Device for detecting boiler flue leakage point

Abstract

The utility model discloses a device for detecting leakage points of a boiler flue, which comprises a shell with a top opening, the bottom of the shell is connected with a negative pressure meter through a connecting pipe, two opposite sides of the shell are provided with clamping grooves matched with corners of a flue pipeline in shape, and the tops of the clamping grooves extend to the opening of the shell. The two side faces, provided with the clamping grooves, of the shell are rotationally connected with shielding assemblies used for sealing the clamping grooves correspondingly. Compared with the prior art, the opening of the shell can be in contact with the straight pipe of the flue pipeline, and the shell can be clamped at the corner position of the flue pipeline through the clamping groove, so that when a leakage point exists in the flue pipeline, gas in the shell can be extracted by the leakage point to form negative pressure, and the negative pressure is reflected by the negative pressure meter; therefore, personnel can conveniently judge whether leakage points exist in the flue pipeline or not through the negative pressure meter.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a device for detecting leakage points of boiler flues. Background Art

[0002] A boiler is an energy conversion device. The fuel input into the boiler heats water through combustion and outputs steam with a certain amount of thermal energy to the outside for power generation or direct use by the unit.

[0003] The boiler flue pipe is generally rectangular. Leakage points will increase the heat loss of the boiler, which does not meet the requirements of energy conservation and environmental protection. Long-term operation will also cause damage to the flue and affect the safe and stable operation of the boiler. Therefore, it is necessary to regularly inspect the flue pipe to determine whether it has leaks.

[0004] At present, the method of detecting boiler flue leaks generally uses torches or candles. After lighting the torch or candle, move it close to the flue pipe and move it along the flue pipe. By the swing of the flame, it is determined whether the flue pipe has a leak. This method is time-consuming and labor-intensive, and is affected by windy environments and has low accuracy. Utility Model Content

[0005] The main purpose of the utility model is to provide a device for detecting leaks in a boiler flue, wherein the opening of the shell can contact the straight pipe of the flue pipe, and the shell can also be engaged with the corner position of the flue pipe through a slot. Therefore, when there is a leak in the flue pipe, the gas in the shell will be drawn out by the leak to form a negative pressure, which is reflected by a negative pressure gauge, making it easy for personnel to judge whether there is a leak in the flue pipe through the negative pressure gauge.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A device for detecting boiler flue leaks comprises a shell with an opening at the top, the bottom of the shell being connected to a negative pressure gauge via a connecting pipe, two opposite sides of the shell being provided with slots matching the corner shape of the flue pipe and the top of the slot extending to the opening of the shell, and two side surfaces of the shell having the slot being rotatably connected to shielding components for closing the slot.

[0008] Furthermore, the shielding assembly includes a baffle for shielding the card slot, one end of the baffle is rotatably connected to the shell via a rotating shaft, the top of the baffle is a horizontal plane and is consistent in height with the top opening of the shell, and the other end of the baffle is connected to the shell via an elastic assembly, and the elastic assembly and baffle of the same group of shielding assemblies are located on the same side of the shell.

[0009] Furthermore, the elastic component includes a positioning plate fixed on the shell, a torsion spring is fixed on the positioning plate, and one end of the torsion spring is fixedly connected to the baffle.

[0010] Furthermore, an L-shaped plate is provided at the end of the baffle away from the rotating shaft, a locking screw is threadedly connected to the end of the L-shaped plate contacting the baffle, and the other end of the L-shaped plate is fixed to the shell.

[0011] Furthermore, a groove matching the edge of the slot is formed on the side of the housing having the slot, and a first sealing strip is fixed in the slot. One end of the first sealing strip is located outside the slot and has an arc-shaped cross section.

[0012] Furthermore, the surfaces of the baffle and the shell that are in contact with the flue pipe are both glued and connected with a second sealing strip.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The opening of the shell of the utility model can be in contact with the straight pipe of the flue pipe, and the shell can also be engaged with the corner position of the flue pipe through the card slot. Therefore, when there is a leak in the flue pipe, the gas in the shell will be drawn out by the leak to form a negative pressure, which will be reflected by the negative pressure gauge, making it easy for personnel to judge whether there is a leak in the flue pipe through the negative pressure gauge.

[0015] The L-shaped plate of the utility model contacts the baffle plate to limit the position of the baffle plate, and the locking screw can be rotated to abut against the baffle plate, thereby further fixing the baffle plate.

[0016] The first sealing strip of the utility model is made of rubber. When the baffle covers the slot, the baffle will fully contact with the first sealing strip to improve the sealing performance after the shell and the straight pipe of the flue pipe are in contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is an overall schematic diagram of a device for detecting boiler flue leakage.

[0018] Figure 2 The utility model is a shell schematic diagram of a device for detecting boiler flue leakage.

[0019] Figure 3 The utility model is a schematic diagram of the structure of a shielding component of a device for detecting boiler flue leakage points.

[0020] Figure 4 The utility model is a schematic diagram of the connection between the shell and the first sealing strip of a device for detecting boiler flue leakage.

[0021] Figure 5 The utility model is a schematic diagram of detecting a flue pipe corner by a device for detecting boiler flue leakage.

[0022] In the figure: 1. shell; 2. baffle; 3. slot; 4. second sealing strip; 5. L-shaped plate; 6. locking screw; 7. connecting pipe; 8. negative pressure gauge; 9. elastic component; 901. positioning plate; 902. torsion spring; 10. rotating shaft; 11. first sealing strip; 12. groove. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] like Figure 1-4 As shown, a device for detecting boiler flue leakage includes a shell 1 with an opening at the top, the bottom of the shell 1 is connected to a negative pressure gauge 8 through a connecting pipe 7, two opposite sides of the shell 1 are provided with a slot 3 matching the corner shape of the flue pipe and the top of the slot 3 extends to the opening of the shell 1, and the two side surfaces of the shell 1 having the slot 3 are rotatably connected to a shielding component for closing the slot 3.

[0025] In this embodiment, if Figure 1 and Figure 3 As shown, the shielding assembly includes a baffle 2 for shielding the card slot 3, one end of the baffle 2 is rotatably connected to the shell 1 through a rotating shaft 10, the position where the rotating shaft 10 is connected to the shell 1 is located near the top opening of the shell 1, the top of the baffle 2 is a horizontal plane and is consistent with the height of the top opening of the shell 1, the other end of the baffle 2 is connected to the shell 1 through an elastic assembly 9, the elastic assembly 9 and the baffle 2 of the same group of shielding assemblies are located on the same side of the shell 1, the elastic assembly 9 includes a positioning plate 901 fixed to the shell 1, a torsion spring 902 is fixed on the positioning plate 901, and one end of the torsion spring 902 is fixedly connected to the baffle 2;

[0026] The baffle 2 will fit tightly to the side of the shell 1 under the action of the elastic component 9 and the rotating shaft 10, so as to cover the card slot 3 of the shell 1. When the personnel fit the opening of the shell 1 to the straight channel of the flue pipe, the top plane of the baffle 2 will also contact the straight channel of the flue pipe. Therefore, when a leak occurs in the straight channel of the flue pipe in the opening of the shell 1, the gas in the shell 1 will be extracted to form a negative pressure. Since the negative pressure gauge 8 can detect the change of the air pressure in the shell 1, the personnel can judge whether there is a leak in the straight channel of the flue pipe in contact with the opening of the shell 1 by the change of the value of the negative pressure gauge 8.

[0027] When it is necessary to detect the corners of the flue pipe, Figure 5As shown, the personnel aligns the shell 1 with the corner of the flue pipe and ensures that the two sides of the shell 1 with the slots 3 are respectively located on both sides of the corner of the flue pipe. Then, the personnel applies force to the shell 1. At this time, the baffle 2 will contact the flue pipe to generate a force, which will overcome the force applied by the torsion spring 902 to the baffle 2, thereby causing the baffle 2 to rotate around the rotating shaft 10 so that the baffle 2 no longer blocks the slot 3. Therefore, the shell 1 is in full contact with the corner of the flue pipe through the slot 3. When there is a leak at the corner of the flue pipe, the gas in the shell 1 will also enter the flue pipe through the leak to form a negative pressure. Therefore, the negative pressure gauge 8 can also detect whether there is a leak at the corner of the flue pipe.

[0028] Among them, Figure 1 and Figure 3 As shown, an L-shaped plate 5 is provided at the end of the baffle 2 away from the rotating shaft 10, and a locking screw 6 is threadedly connected to the end of the L-shaped plate 5 contacting the baffle 2, and the other end of the L-shaped plate 5 is fixed to the shell 1. When the baffle 2 blocks the card slot 3, a part of the baffle 2 will be located between the L-shaped plate 5 and the shell 1. At this time, the L-shaped plate 5 contacts the baffle 2 to limit the baffle 2, and the locking screw 6 can be rotated to press against the baffle 2, thereby further fixing the baffle 2.

[0029] Among them, Figure 2 and Figure 4 As shown, the shell 1 has a groove 12 on the side of the slot 3 that matches the edge of the slot 3, and a first sealing strip 11 is fixed in the groove 12. One end of the first sealing strip 11 is located outside the groove 12 and has an arc-shaped cross-section. The first sealing strip 11 is made of rubber. When the baffle 2 covers the slot 3, the baffle 2 will fully contact with the first sealing strip 11, thereby improving the sealing performance of the shell 1 after contacting the straight pipe of the flue pipe. In addition, since the cross-section of the first sealing strip 11 located outside the groove 12 is arc-shaped, the baffle 2 will not be stuck under the action of the deformation of the first sealing strip 11 itself, so that the baffle 2 can rotate normally.

[0030] Among them, Figure 1 As shown, the surfaces of the baffle 2 and the shell 1 contacting the flue pipe are glued with a second sealing strip 4, which can improve the tightness of the shell 1 and the baffle 2 when contacting the flue pipe, and avoid the presence of gaps when the shell 1 and the baffle 2 contact the flue pipe.

[0031] Working principle: there is negative pressure in the flue pipe. When a leak occurs on the pipe, the air flows inward. When the personnel fits the opening of the shell 1 to the straight path of the flue pipe, the top plane of the baffle 2 will contact the straight path of the flue pipe. If there is a leak on this straight path, the gas in the shell 1 will be drawn out by the leak to form a negative pressure. The negative pressure gauge 8 can detect the change in the air pressure in the shell 1. Therefore, the personnel can judge whether there is a leak on the straight path of the flue pipe in contact with the opening of the shell 1 by the change in the value of the negative pressure gauge 8. When it is necessary to detect the corner of the flue pipe, the personnel align the shell 1 with the corner of the flue pipe. And ensure that the two sides of the shell 1 with the slot 3 are respectively located on both sides of the corner of the flue pipe. Then, the person applies force to the shell 1. At this time, the baffle 2 will contact the flue pipe to generate a force, and this force will overcome the force applied by the torsion spring 902 to the baffle 2, and then the baffle 2 will rotate around the rotating shaft 10, so that the baffle 2 no longer blocks the slot 3. Therefore, the shell 1 is in full contact with the corner of the flue pipe through the slot 3. If there is a leak at this corner, the gas in the shell 1 will also be drawn out by the leak to form a negative pressure. At this time, the value of the negative pressure gauge 8 becomes smaller, and if the value of the negative pressure gauge 8 remains unchanged, it means that there is no leak.

[0032] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A device for detecting boiler flue leaks, comprising a housing (1) with an opening at the top, characterized in that: The bottom of the shell (1) is connected to a negative pressure gauge (8) via a connecting pipe (7); two opposite sides of the shell (1) are provided with a card slot (3) matching the corner shape of the flue pipe, and the top of the card slot (3) extends to the opening of the shell (1); and the two side surfaces of the shell (1) having the card slot (3) are rotatably connected to shielding components for closing the card slot (3).

2. A device for detecting boiler flue leakage according to claim 1, characterized in that: The shielding assembly comprises a baffle (2) for shielding the card slot (3); one end of the baffle (2) is rotatably connected to the housing (1) via a rotating shaft (10); the top of the baffle (2) is a horizontal plane and is at the same height as the top opening of the housing (1); the other end of the baffle (2) is connected to the housing (1) via an elastic assembly (9); the elastic assembly (9) and the baffle (2) of the same group of shielding assemblies are located on the same side of the housing (1).

3. A device for detecting boiler flue leakage according to claim 2, characterized in that: The elastic component (9) comprises a positioning plate (901) fixed on the housing (1), a torsion spring (902) being fixed on the positioning plate (901), and one end of the torsion spring (902) being fixedly connected to the baffle (2).

4. A device for detecting boiler flue leakage according to claim 2 or 3, characterized in that: An L-shaped plate (5) is provided at the end of the baffle (2) away from the rotating shaft (10); a locking screw (6) is threadedly connected to the end of the L-shaped plate (5) contacting the baffle (2); and the other end of the L-shaped plate (5) is fixed to the housing (1).

5. The device for detecting boiler flue leakage according to claim 4, characterized in that: The housing (1) has a groove (12) on the side of the groove (3) which matches the edge of the groove (3). A first sealing strip (11) is fixed in the groove (12). One end of the first sealing strip (11) is located outside the groove (12) and has an arc-shaped cross section.

6. The device for detecting boiler flue leakage according to claim 4, characterized in that: The surfaces of the baffle (2) and the shell (1) that are in contact with the flue pipe are both glued and connected with a second sealing strip (4).

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