Flue gas flow adjusting device of low-nitrogen combustor

Abstract

The utility model relates to the technical field of flow adjusting devices, and discloses a low-nitrogen burner smoke flow adjusting device which comprises a valve body, a connecting pipe is fixedly connected to one side of the valve body, a U-shaped frame is fixedly connected to the inner wall of the connecting pipe, a filter screen is slidably connected to the inner wall of the U-shaped frame, and a valve clack is arranged in the valve body. The side, close to the filter screen, of the valve clack is fixedly connected with a first connecting block, the first connecting block is rotationally connected with a connecting plate, the side, away from the first connecting block, of the connecting plate is rotationally connected with a second connecting block, the side, away from the connecting plate, of the second connecting block is fixedly connected with a square plate, and a first square groove is formed in the top of the square plate. First racks are fixedly connected to the inner walls of the two sides of the first square groove correspondingly, and the two first racks are connected with gears in an engaged mode correspondingly. Particle impurities can be prevented from entering the valve body, smoothness of a channel in the valve body can be guaranteed, the blocking risk is reduced, and the stability and reliability of the device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flow regulating devices, in particular to a flue gas flow regulating device for a low-nitrogen burner. Background Art

[0002] A low-nitrogen burner is a device specially designed to reduce the emission of nitrogen oxides (NOx) generated during the combustion process. It is usually used in combustion equipment such as industrial boilers, gas turbines, and gas engines. The low-nitrogen burner adopts advanced combustion technology to optimize the combustion process and reduce the generation of nitrogen oxides, thereby achieving the purpose of reducing emission concentrations. The flue gas flow regulating device of the low-nitrogen burner is usually used to control the flow of flue gas entering the flue gas treatment system. By adjusting the flue gas flow, the normal operation of the flue gas treatment system can be ensured. However, most of the low-nitrogen burner flue gas flow regulating devices in the prior art still have problems that need to be solved during use.

[0003] Most of the low-nitrogen burner flue gas flow regulating devices in the prior art lack a mechanism for filtering particulate impurities in the flue gas. When the flue gas passes through the low-nitrogen burner flue gas flow regulating device, most of the particulate impurities will remain inside the valve body of the low-nitrogen burner flue gas flow regulating device. After continuous accumulation, the internal space of the valve body will be reduced, which will lead to inaccurate flow regulation and the risk of blockage. Therefore, it is necessary to design a low-nitrogen burner flue gas flow regulating device to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a low-nitrogen burner flue gas flow regulating device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A low-nitrogen burner flue gas flow regulating device comprises a valve body, one side of the valve body is fixedly connected to a connecting pipe, the inner wall of the connecting pipe is fixedly connected to a U-shaped frame, the inner wall of the U-shaped frame is slidably connected to a filter screen, a valve disc is arranged inside the valve body, the valve disc is fixedly connected to a first connecting block on a side close to the filter screen, the first connecting block is rotatably connected to a connecting plate, the connecting plate is rotatably connected to a second connecting block on a side away from the first connecting block, the second connecting block is fixedly connected to a square plate on a side away from the connecting plate, a first square groove is provided on the top of the square plate, the first square groove has inner walls on both sides fixedly connected to a first rack, two of the first racks are meshedly connected to a gear, two of the gears are meshedly connected to a second rack, the two second racks are not in the same horizontal plane, two of the second racks are fixedly connected to a brush plate on a side away from each other, two of the brush plates are provided with a cleaning brush on a side close to the filter screen, the cleaning brush contacts the filter screen, the square plate sleeve is provided with a The invention relates to a square tube, wherein the square tube is fixedly connected to a connecting tube, and the bottom inner wall of the connecting tube is fixedly connected to two L-shaped fixing plates, and the top of the L-shaped fixing plate is fixedly connected to a plug rod on the side close to the gear, and the plug rod is passed through the gear. Since a filter is used to filter particulate impurities in the flue gas and the filter can be cleaned during the flow rate adjustment process, the technical means effectively solves the problem that most of the low-nitrogen burner flue gas flow regulating devices in the prior art proposed in the background technology lack a mechanism for filtering particulate impurities in the flue gas. When the flue gas passes through the low-nitrogen burner flue gas flow regulating device, most of the particulate impurities will remain in the valve body of the low-nitrogen burner flue gas flow regulating device. After continuous accumulation, the internal space of the valve body will be reduced, which will lead to inaccurate flow regulation and the risk of clogging. Therefore, the particulate impurities are prevented from entering the interior of the valve body, which can ensure the smooth passage of the internal channel of the valve body, reduce the risk of clogging, and improve the stability and reliability of the device.

[0007] As a further solution of the utility model, two round rods are passed through each of the two second racks, and the round rods are fixedly connected to the connecting pipe.

[0008] As a further solution of the utility model, an opening is opened at the top of the connecting pipe, and a sealing cover is installed at the opening at the top of the connecting pipe using bolts.

[0009] As a further solution of the utility model, a mounting frame is fixedly connected to the top of the valve body, and a servo motor is fixedly connected to the top of the mounting frame.

[0010] As a further solution of the present invention, the output shaft of the servo motor is fixedly connected to a valve shaft, the valve shaft penetrates the mounting frame and the valve body, and the valve shaft is fixedly connected to the valve disc.

[0011] As a further solution of the utility model, the valve body and the connecting pipe are both fixedly connected with a flange, and the flange and the connecting pipe are both provided with a second square groove, and the second square groove is adapted to the square plate.

[0012] The beneficial effects of the utility model are:

[0013] The utility model: due to the technical means of using a filter to filter the particulate impurities in the flue gas and being able to clean the filter during the process of adjusting the flow rate, the utility model effectively solves the problem that most of the existing low-nitrogen burner flue gas flow regulating devices in the background technology lack a mechanism for filtering the particulate impurities in the flue gas. When the flue gas passes through the low-nitrogen burner flue gas flow regulating device, most of the particulate impurities will remain inside the valve body of the low-nitrogen burner flue gas flow regulating device. After continuous accumulation, the internal space of the valve body will be reduced, which will lead to inaccurate flow regulation and the risk of clogging. The problem, thereby achieving the technical effect of preventing particulate impurities from entering the interior of the valve body, ensuring the smooth passage of the internal channel of the valve body, reducing the risk of clogging, and improving the stability and reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a three-dimensional structural schematic diagram of a low-nitrogen burner flue gas flow regulating device proposed by the utility model;

[0015] Figure 2 This is a schematic diagram of the first partial structure of a low-nitrogen burner flue gas flow rate regulating device proposed by the utility model;

[0016] Figure 3 This is a second partial structural schematic diagram of a low-nitrogen burner flue gas flow regulating device proposed by the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the connection plate of a low-nitrogen burner flue gas flow regulating device proposed by the utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the second rack of a low-nitrogen burner flue gas flow regulating device proposed by the utility model;

[0019] Figure 6 This is a schematic diagram of the expanded structure of the filter screen of a low-nitrogen burner flue gas flow regulating device proposed by the utility model.

[0020] In the figure: 1. valve body; 2. connecting pipe; 3. U-shaped frame; 4. filter screen; 5. valve disc; 6. first connecting block; 7. connecting plate; 8. second connecting block; 9. square plate; 10. first square groove; 11. first rack; 12. gear; 13. second rack; 14. brush plate; 15. cleaning brush; 16. square tube; 17. round rod; 18. sealing cover; 19. mounting frame; 20. servo motor; 21. L-shaped fixing plate; 22. valve shaft; 23. flange; 24. second square groove. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] Reference Figure 1-Figure 6A low-nitrogen burner flue gas flow regulating device comprises a valve body 1, a connecting pipe 2 is fixedly connected to one side of the valve body 1, a U-shaped frame 3 is fixedly connected to the inner wall of the connecting pipe 2, a filter screen 4 is slidably connected to the inner wall of the U-shaped frame 3, a valve flap 5 is arranged inside the valve body 1, a first connecting block 6 is fixedly connected to the valve flap 5 on the side close to the filter screen 4, the first connecting block 6 is rotatably connected to the connecting plate 7, the connecting plate 7 is rotatably connected to the second connecting block 8 on the side away from the first connecting block 6, and the second connecting block 8 is fixed on the side away from the connecting plate 7. A square plate 9 is connected, a first square groove 10 is opened on the top of the square plate 9, and the inner walls on both sides of the first square groove 10 are fixedly connected with first racks 11, and the two first racks 11 are meshed with gears 12, and the two gears 12 are meshed with second racks 13. The two second racks 13 are not in the same horizontal plane, and the two second racks 13 are fixedly connected with brush plates 14 on the sides away from each other. The two brush plates 14 are provided with cleaning brushes 15 on the side close to the filter screen 4, and the cleaning brushes 15 are in contact with the filter screen 4. The shaped plate 9 is provided with a square tube 16, and the square tube 16 is fixedly connected to the connecting tube 2. Two L-shaped fixing plates 21 are fixedly connected to the bottom inner wall of the connecting tube 2. The top of the L-shaped fixing plate 21 is fixedly connected with a plug rod on the side close to the gear 12, and the plug rod is penetrated by the gear 12. Since a filter is used to filter the particulate impurities in the flue gas and the filter can be cleaned during the flow rate adjustment process, the problem that most of the low-nitrogen burner flue gas flow regulating devices in the prior art lack a mechanism for filtering the particulate impurities in the flue gas is effectively solved in the background technology. When the flue gas passes through the low-nitrogen burner flue gas flow regulating device, most of the particulate impurities will remain in the valve body of the low-nitrogen burner flue gas flow regulating device. After continuous accumulation, the internal space of the valve body will be reduced, which will lead to inaccurate flow regulation and the risk of clogging. The problem also exists, thereby achieving the technical effect of preventing particulate impurities from entering the interior of the valve body, ensuring the smooth passage of the internal channel of the valve body, reducing the risk of clogging, and improving the stability and reliability of the device.

[0024] In this embodiment, two round rods 17 are respectively passed through the two second racks 13 , and the round rods 17 are fixedly connected to the connecting pipe 2 .

[0025] In this embodiment, an opening is opened at the top of the connecting pipe 2, and a sealing cover 18 is installed at the opening of the top of the connecting pipe 2 using bolts.

[0026] In this embodiment, a mounting bracket 19 is fixedly connected to the top of the valve body 1 , and a servo motor 20 is fixedly connected to the top of the mounting bracket 19 .

[0027] In this embodiment, the output shaft of the servo motor 20 is fixedly connected to the valve shaft 22 . The valve shaft 22 penetrates the mounting frame 19 and the valve body 1 . The valve shaft 22 is fixedly connected to the valve flap 5 .

[0028] In this embodiment, the valve body 1 and the connecting pipe 2 are both fixedly connected with a flange 23 , and the flange 23 and the connecting pipe 2 are both provided with a second square groove 24 , which is matched with the square plate 9 .

[0029] Working principle: When using this device, the flange 23 can be connected to the flue gas pipe of most low-nitrogen burners by bolts. The servo motor 20 can be started, and the output shaft of the servo motor 20 will drive the valve shaft 22 to rotate, and the valve shaft 22 will drive the valve flap 5 to rotate, so as to adjust the flow rate of the flue gas. When the flue gas is discharged, the particulate impurities in the flue gas will be filtered by the filter 4, so as to avoid the direct discharge of the particulate impurities and the accumulation of particulate impurities in the valve body 1 to reduce the space inside the valve body 1, so as to ensure the accuracy of the flow rate and protect the valve body 1. When the device is used for a period of time, a part of the particulate impurities will accumulate on the filter 4, and the servo motor 20 can be started to rotate the valve flap 5, and the valve flap 5 will drive the first connecting block 6 to move, and the first connecting block 6 will drive the connecting plate 7 to move, and the connecting plate 7 will drive the second connecting block 8 to move, and the second connecting block 8 will drive The movable square plate 9 moves along the square tube 16. The movement of the square plate 9 will drive the first rack 11 to move, and the first rack 11 will drive the gear 12 to rotate, and the gear 12 will drive the second rack 13 to move. By setting the round rod 17, the second rack 13 will gradually disengage from the round rod 17 when it moves, so as to ensure that the second rack 13 will not deviate when it moves. The movement of the second rack 13 will drive the brush plate 14 to move, and the brush plate 14 will drive the cleaning brush 15 to move to clean the filter 4, and clean up the particulate impurities accumulated on the filter 4. When the valve disc 5 rotates in the opposite direction and returns to the initial position, the two cleaning brushes 15 will also move away from each other and return to the initial position. When maintaining the device, the bolts on the sealing cover 18 can be removed, and the sealing cover 18 can be removed, the filter 4 can be pulled out for replacement, and the particulate impurities in the connecting pipe 2 can be cleaned.

[0030] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A low-nitrogen burner flue gas flow regulating device, comprising a valve body (1), characterized in that: A connecting pipe (2) is fixedly connected to one side of the valve body (1), a U-shaped frame (3) is fixedly connected to the inner wall of the connecting pipe (2), a filter screen (4) is slidably connected to the inner wall of the U-shaped frame (3), a valve flap (5) is arranged inside the valve body (1), a first connecting block (6) is fixedly connected to the valve flap (5) on the side close to the filter screen (4), the first connecting block (6) is rotatably connected to a connecting plate (7), the connecting plate (7) is rotatably connected to a second connecting block (8) on the side away from the first connecting block (6), the second connecting block (8) is fixedly connected to a square plate (9) on the side away from the connecting plate (7), a first square groove (10) is provided on the top of the square plate (9), the inner walls on both sides of the first square groove (10) are fixedly connected to first racks (11), and the two The first racks (11) are meshedly connected with a gear (12), and the two gears (12) are meshedly connected with a second rack (13). The two second racks (13) are not on the same horizontal plane. The two second racks (13) are fixedly connected with a brush plate (14) on the side away from each other. The two brush plates (14) are provided with a cleaning brush (15) on the side close to the filter (4). The cleaning brush (15) is in contact with the filter (4). The square plate (9) is sleeved with a square tube (16). The square tube (16) is fixedly connected to the connecting tube (2). The bottom inner wall of the connecting tube (2) is fixedly connected with two L-shaped fixing plates (21). The top of the L-shaped fixing plate (21) is fixedly connected with an insertion rod on the side close to the gear (12). The insertion rod is inserted into the gear (12).

2. The low nitrogen burner flue gas flow regulating device according to claim 1, characterized in that: Two round rods (17) are respectively provided through the two second racks (13), and the round rods (17) are fixedly connected to the connecting pipe (2).

3. The low nitrogen burner flue gas flow regulating device according to claim 2, characterized in that: The top of the connecting pipe (2) is provided with an opening, and a sealing cover (18) is installed at the opening of the top of the connecting pipe (2) using bolts.

4. The low nitrogen burner flue gas flow regulating device according to claim 1, characterized in that: The top of the valve body (1) is fixedly connected to a mounting frame (19), and the top of the mounting frame (19) is fixedly connected to a servo motor (20).

5. The low nitrogen burner flue gas flow regulating device according to claim 4, characterized in that: The output shaft of the servo motor (20) is fixedly connected to a valve shaft (22), the valve shaft (22) is inserted through the mounting frame (19) and the valve body (1), and the valve shaft (22) is fixedly connected to the valve flap (5).

6. The low nitrogen burner flue gas flow regulating device according to claim 5, characterized in that: The valve body (1) and the connecting pipe (2) are both fixedly connected with a flange (23), and the flange (23) and the connecting pipe (2) are both provided with a second square groove (24), and the second square groove (24) is adapted to fit the square plate (9).

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