An online detection component for harmful gases in ventilation ducts

Abstract

The utility model discloses an online detection component for harmful gases in a ventilation duct, wherein a gas channel is provided on a cover plate; a plurality of ventilation holes are distributed on the outer side of the cover plate surrounding the gas channel; a sealing sheet is hinged on the front side of the cover plate, and has a closed position for closing the ventilation holes and an open position for opening the ventilation holes; a torsion spring is connected between the cover plate and the sealing sheet; a plurality of fasteners are arranged at intervals on the outer side of the cover plate surrounding the gas channel; the fasteners have movable ends that move toward or away from the gas channel; the movable ends of the plurality of fasteners are enclosed to form a fastening space that matches the outer peripheral wall of the ventilation duct; and a gas detection device is connected to the rear end of the gas channel. The utility model can intercept the gas discharged from the ventilation duct to gather the harmful gases, realize timely and accurate detection of the harmful gases, and will not interfere with the normal exhaust operation of the ventilation duct when the exhaust volume of the ventilation duct is large, thereby effectively meeting the detection requirements of harmful gases in the ventilation duct.

Description

Technical Field

[0001] The utility model relates to the technical field of harmful gas detection devices, in particular to an online detection component for harmful gas in a ventilation duct. Background Art

[0002] In industrial production and building environments, ventilation ducts are key facilities to ensure air circulation and air quality. However, due to the potential risk of harmful gas leakage, traditional ventilation systems lack effective monitoring methods and are unable to detect harmful gas leaks in a timely manner, which may lead to serious health and safety accidents. During temporary inspections of ventilation ducts, it is conventional to install gas sensors in the ventilation ducts. When the ventilation ducts are exhausting, harmful gases pass through the gas sensors and are detected by the gas sensors. When the concentration of harmful gases emitted by the ventilation ducts per unit time or per unit volume is too small, it is difficult to detect the harmful gases discharged from the ventilation ducts in a timely and accurate manner, and harmful gas leaks cannot be detected in a timely manner. The online detection effect is poor, and it is difficult to meet the harmful gas detection needs of the ventilation ducts. Utility Model Content

[0003] In view of the above-mentioned technical problems, the purpose of the utility model is to propose an online detection component for harmful gases in ventilation ducts, which can intercept the gases discharged in the ventilation ducts to gather the harmful gases, realize timely and accurate detection of the harmful gases, and will not interfere with the normal exhaust operation of the ventilation ducts when the exhaust volume of the ventilation ducts is large, thereby effectively meeting the detection needs of harmful gases in the ventilation ducts.

[0004] The technical solution of the utility model is achieved as follows: an online detection component for harmful gases in a ventilation duct, comprising a cover plate, a gas detection device, a sealing sheet, a torsion spring, and a fastener;

[0005] The cover plate is provided with a gas channel; the gas channel has an inlet end formed on the back side of the cover plate and an outlet end formed on the front side of the cover plate; the cover plate is provided with a plurality of ventilation holes distributed around the outer side of the gas channel;

[0006] A sealing piece is provided corresponding to each of the ventilation holes; the sealing piece is hinged to the front side of the cover plate, and has a closed position for closing the ventilation hole and an open position for opening the ventilation hole; the torsion spring is connected between the cover plate and the sealing piece, and has an elastic force for driving the sealing piece to move from the open position to the closed position;

[0007] A plurality of fasteners are arranged at intervals on the outer side of the cover plate surrounding the gas passage; the fasteners have movable ends that move toward or away from the gas passage; the movable ends of the plurality of fasteners enclose a fastening space that matches the outer peripheral wall of the ventilation duct;

[0008] The gas detection device is connected to the rear end of the gas channel and is used to detect the gas discharged from the outlet end of the gas channel.

[0009] Furthermore, the ventilation hole is a strip hole extending radially along the cover plate; a hinge position is formed on the cover plate outside one end of the strip hole away from the gas channel; and one end of the sealing plate is connected to the hinge position.

[0010] Furthermore, the edge of the cover plate extends toward the back side to form an extended edge; the fastener is threadedly connected to the extended edge.

[0011] Furthermore, the gas detection device includes a shell and a detection sensor; the shell is provided with a gas inlet and a gas outlet; the detection sensor is arranged in the shell and located between the gas inlet and the gas outlet; the gas inlet is connected to the outlet end of the gas channel.

[0012] Furthermore, the inlet end of the gas channel is a trumpet-shaped structure; the small mouth end of the trumpet-shaped structure extends to form the outlet end of the gas channel.

[0013] Furthermore, the inlet end of the gas channel extends toward the back side of the cover plate, and a designed distance is formed between the inlet end of the gas channel and the back side of the cover plate.

[0014] Furthermore, the sealing sheet is a rubber sheet.

[0015] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0016] 1. The utility model uses a cover plate and fasteners in coordination, so that the cover plate can cover the end of the ventilation duct, thereby intercepting the gas discharged from the ventilation duct to gather harmful gases and increase the concentration of harmful gases. During the conventional exhaust operation of the ventilation duct, the gas in the ventilation duct is discharged from the gas channel, and the gas detection device detects the gas, thereby realizing timely and accurate detection of harmful gases, so that harmful gas leaks can be discovered in time. Through the coordinated use of the sealing plate and the ventilation hole, when the exhaust volume of the ventilation duct is large and the exhaust capacity of the gas channel is insufficient, the airflow in the ventilation duct pushes the sealing plate to rotate and open the ventilation hole to improve the overall ventilation capacity, so as not to interfere with the normal exhaust operation of the ventilation duct, so as to meet the detection requirements of harmful gases in ventilation ducts with different exhaust volumes.

[0017] 2. The utility model can fix the cover plate on ventilation ducts with different pipe diameters by adjusting the fasteners, so as to meet the harmful gas detection requirements of ventilation ducts with different pipe diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The technical solution of the utility model is further described below in conjunction with the accompanying drawings:

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the overall structure of the utility model;

[0020] Figure 2 for Figure 1 A cross-sectional structural diagram of ;

[0021] Figure 3 for Figure 1 Exploded view of;

[0022] Figure 4 for Figure 1 A schematic diagram of a three-dimensional structure from another perspective;

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the sealing sheet and the torsion spring of the utility model;

[0024] Among them: 1. Cover plate; 11. Extended edge; 12. Ventilation hole; 2. Gas channel; 21. Inlet end; 22. Outlet end; 3. Gas detection device; 31. Shell; 32. Gas inlet; 33. Gas outlet; 34. Detection sensor; 4. Articulated seat; 5. Sealing piece; 6. Torsion spring; 7. Fastener; 71. Rubber pad. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0026] like Figure 1-5 The figure shows an online detection component for harmful gases in a ventilation duct as described in this embodiment, which is assembled to the air outlet position of the ventilation duct to perform online detection of the gas discharged from the ventilation duct. The detection component includes a cover plate 1, a gas detection device 3, a sealing sheet 5, a torsion spring 6, a fastener 7 and other devices or components. Among them, the cover plate 1 is a circular structure with a designed outer diameter so that it can completely cover the air outlet of the ventilation duct. The cover plate 1 has a back and a front. The back of the cover plate 1 is defined as the side facing the ventilation duct. A gas channel 2 is formed on the cover plate 1. The gas channel 2 extends along the central axis direction of the cover plate 1, and has an inlet end 21 formed on the back side of the cover plate 1 and an outlet end 22 formed on the front side of the cover plate 1. When the cover plate 1 is covered on the ventilation duct, the gas discharged from the ventilation duct can enter the gas channel 2 through the inlet end 21 and then be discharged from the outlet end 22.

[0027] The aforementioned gas detection device 3 is connected to the outlet end 22 of the gas channel 2 through a flange to detect the gas discharged from the outlet end 22 of the gas channel 2. It is used to detect the gas flowing in the gas channel 2. The gas detection device 3 is a conventional structure of the prior art, including a shell 31 and a detection sensor 34. A gas inlet 32 ​​and a gas outlet 33 are processed on the shell 31. The detection sensor 34 is arranged in the shell 31 and is located between the gas inlet 32 ​​and the gas outlet 33. The gas inlet 32 ​​is connected to the outlet end 22 of the gas channel 2. The gas discharged from the outlet end 22 of the gas channel 2 enters the shell 31 through the gas inlet 32, and the gas contacts the detection sensor 34 to be detected, and then the gas is discharged from the gas outlet 33. The above-mentioned detection sensor 34 can be a wired or wireless sensor in the prior art.

[0028] Among them, the inlet end 21 of the gas channel 2 extends toward the back side of the cover plate 1, and a designed distance is formed between the inlet end 21 of the gas channel 2 and the back side of the cover plate 1. Through the above structural design, after the cover plate 1 is assembled on the ventilation duct, the inlet end 21 of the gas channel 2 penetrates into the interior of the ventilation duct, and a gathering space is formed between the inlet end 21 of the gas channel 2 and the cover plate 1, so as to gather part of the gas discharged from the ventilation duct. In order to guide the gas in the ventilation duct, the inlet end 21 of the gas channel 2 is designed as a trumpet-shaped structure. The small mouth end of the trumpet-shaped structure extends to form the outlet end 22 of the gas channel 2.

[0029] The aforementioned cover plate 1 is provided with a plurality of ventilation holes 12 distributed along the circumferential direction of the cover plate 1 around the outer side of the gas channel 2. The ventilation hole 12 runs through the front and side of the cover plate 1. In the present embodiment, in the specific structural design, the ventilation hole 12 is a strip hole extending radially along the cover plate 1. Through the structural design, when the cover plate 1 covers the end of the ventilation duct of different pipe diameters, at least part of the ventilation hole 12 can be connected to the ventilation duct. A sealing piece 5 is installed corresponding to each ventilation hole 12. The sealing piece 5 is hinged to the front side of the cover plate 1, and has a closed position for closing the ventilation hole 12 and an open position for opening the ventilation hole 12. A torsion spring 6 is connected between the cover plate 1 and the sealing piece 5, which provides an elastic effect to drive the sealing piece 5 to move from the open position to the closed position. In the initial state, when the cover plate 1 is in any orientation, under the action of the torsion spring 6, the sealing piece 5 can cover the ventilation hole 12. In the present embodiment, a hinged position is formed on the cover plate 1 at the outer side of one end of the ventilation hole 12 away from the gas channel 2. The hinged position is fixed with a hinge seat 4 by screws. One end of a sealing sheet 5 is hingedly connected to the hinge seat 4. The sealing sheet 5 is a rubber sheet with a designed weight.

[0030] The aforementioned cover plate 1 is processed with a plurality of fasteners 7 at intervals along the circumferential direction of the cover plate 1 around the outer side of the gas channel 2. In this embodiment, the number of fasteners 7 is four. The fastener 7 is a rod-shaped structure, and the fastener 7 has a movable end that moves toward or away from the gas channel 2. The movable ends of the plurality of fasteners 7 enclose a fastening space that matches the outer peripheral wall of the ventilation duct. The movable end of the fastener 7 abuts against the outer wall of the ventilation duct, so that the cover plate 1 can be fixedly assembled to the ventilation duct. By driving the movable end of the fastener 7 away from the gas channel 2, the cover plate 1 can be removed from the ventilation duct. In this embodiment, an annular extension edge 11 is formed on the edge of the cover plate 1 extending toward the back side. The fastener 7 is threadedly connected to the extension edge 11. By rotating the fastener 7 in the forward and reverse directions, the movable ends of each fastener 7 can be moved closer to or away from each other. A rubber pad 71 is installed on the movable end of the fastener 7, and when assembled, the rubber pad 71 abuts against the outer wall of the ventilation duct.

[0031] In the above structural design, the cover plate 1 has a designed outer diameter, and the cover plate 1 can be fixed on ventilation ducts with different diameters by adjusting the fasteners 7, thereby meeting the harmful gas detection requirements of ventilation ducts with different diameters.

[0032] During specific assembly, the cover plate 1 is sealed at the end of the ventilation duct, and the fasteners 7 are rotated so that the movable ends of the fasteners 7 are in contact with the outer wall of the ventilation duct, thereby fixing the cover plate 1 to the ventilation duct, and the gas detection device 3 is fixed to the outlet end 22 of the gas channel 2 by flange connection. In use, the cover plate 1 seals the end of the ventilation duct, so that the gas discharged in the ventilation duct can be intercepted to gather harmful gases and increase the concentration of harmful gases during detection. During the conventional exhaust operation of the ventilation duct, the gas in the ventilation duct is discharged from the gas channel 2, and the gas detection device 3 performs online real-time detection of the discharged gas, thereby realizing timely and accurate detection of harmful gases, so that harmful gas leakage can be found in time. When the exhaust volume of the ventilation duct is large and the exhaust capacity of the gas channel 2 is insufficient, the airflow in the ventilation duct drives the cover plate 5 to rotate and open the ventilation hole 12, and part of the gas is discharged from the ventilation hole 12, thereby improving the overall ventilation capacity, so as not to interfere with the normal exhaust operation of the ventilation duct, so as to meet the detection requirements of harmful gases in ventilation ducts with different exhaust volumes.

[0033] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An online detection assembly for harmful gases in a ventilation duct, comprising a cover plate, a gas detection device, a sealing sheet, a torsion spring, and a fastener; characterized in that: The cover plate is provided with a gas channel; the gas channel has an inlet end formed on the back side of the cover plate and an outlet end formed on the front side of the cover plate; the cover plate is provided with a plurality of ventilation holes distributed around the outer side of the gas channel; A sealing piece is provided corresponding to each of the ventilation holes; the sealing piece is hinged to the front side of the cover plate, and has a closed position for closing the ventilation hole and an open position for opening the ventilation hole; the torsion spring is connected between the cover plate and the sealing piece, and has an elastic force for driving the sealing piece to move from the open position to the closed position; A plurality of fasteners are arranged at intervals on the outer side of the cover plate surrounding the gas passage; the fasteners have movable ends that move toward or away from the gas passage; the movable ends of the plurality of fasteners enclose a fastening space that matches the outer peripheral wall of the ventilation duct; The gas detection device is connected to the rear end of the gas channel and is used to detect the gas discharged from the outlet end of the gas channel.

2. The online detection component for harmful gases in ventilation ducts according to claim 1 is characterized by: The ventilation hole is a strip hole extending radially along the cover plate; a hinge position is formed on the cover plate outside one end of the strip hole away from the gas channel; one end of the sealing sheet is connected to the hinge position.

3. The online detection component for harmful gases in ventilation ducts according to claim 1 is characterized in that: The edge of the cover plate extends toward the back side to form an extended edge; the fastener is threadedly connected to the extended edge.

4. The online detection component for harmful gases in ventilation ducts according to claim 1 is characterized by: The gas detection device comprises a shell and a detection sensor; the shell is provided with a gas inlet and a gas outlet; the detection sensor is arranged in the shell and located between the gas inlet and the gas outlet; the gas inlet is connected to the outlet end of the gas channel.

5. The online detection component for harmful gases in ventilation ducts according to claim 1 is characterized in that: The inlet end of the gas channel is a trumpet-shaped structure; the small mouth end of the trumpet-shaped structure extends to form the outlet end of the gas channel.

6. The online detection component for harmful gases in ventilation ducts according to claim 1 is characterized by: The inlet end of the gas channel extends toward the back side of the cover plate, and a designed distance is formed between the inlet end of the gas channel and the back side of the cover plate.

7. The online detection component for harmful gases in ventilation ducts according to claim 1 is characterized by: The sealing sheet is a rubber sheet.

Images