Ventilation device and boiler ventilation system

Abstract

The utility model discloses a ventilation device and a boiler ventilation system, the ventilation device comprises a ventilation box, at least one side wall of the ventilation box is provided with an air inlet channel, the air inlet channel is communicated with an inner cavity of the ventilation box, and a filter screen is arranged at the communication position; a fixing block is arranged in the air inlet channel, fan blades are arranged between the fixing block and the filter screen, and the fan blades are rotationally connected with the fixing block through a transmission rod; a scraping block is arranged on the inner surface of the filter screen, the scraping block is connected with the transmission rod through a transmission mechanism, and under the action of the transmission mechanism, the scraping block is attached to the inner surface of the filter screen to move. The utility model solves the technical problem that the combustion ventilation of the boiler is influenced by the blockage of the filter screen.

Description

Technical Field

[0001] The utility model belongs to the technical field of ventilation devices, and in particular relates to a ventilation device and a boiler ventilation system. Background Art

[0002] A boiler is an energy conversion device that outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy. It is mainly used for daily life and also has a small amount of application in industrial production. Most existing boilers heat by burning coal. In order to allow the coal to contact with more air for full combustion, a combustion ventilation device is usually installed at the bottom of the boiler.

[0003] The current boiler combustion ventilation device is usually composed of a ventilation box, a vent on the ventilation box, and a filter fixedly connected to the vent. That is, the vent of the ventilation box is connected to the air outlet of the fan through a transmission pipe, and the air is introduced into the boiler through the ventilation box. The slag produced by the boiler combustion is filtered through the filter to prevent the heavy slag from entering the vent in reverse, and it needs to be cleaned regularly. After the filter has been used for a period of time, the slag will adhere to the filter and then block the filter. The filter needs to be removed and replaced and cleaned regularly to avoid affecting the combustion ventilation of the boiler. Utility Model Content

[0004] In view of the current technical problems, the utility model aims to provide a ventilation device and a boiler ventilation system, wherein the ventilation device can solve the technical problem that filter blockage affects boiler combustion ventilation.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A ventilation device comprises a ventilation box, at least one side wall of which is provided with an air inlet channel, the air inlet channel is connected with the inner cavity of the ventilation box, and a filter is provided at the connecting point; its structural features are: a fixed block is provided in the air inlet channel, a fan blade is provided between the fixed block and the filter, and the fan blade and the fixed block are rotatably connected by a transmission rod; a scraper block is provided on the inner surface of the filter, and the scraper block is connected to the transmission rod through a transmission mechanism, and under the action of the transmission mechanism, the scraper block moves in contact with the inner surface of the filter.

[0007] When the ventilation device is in use, the fresh air blown in by the fan enters the ventilation box through the air inlet channel and is introduced into the boiler. While ventilating, the fan blades rotate under the action of the fresh air, causing the transmission rod to rotate and drive the scraper block to move along the inner surface of the filter through the transmission mechanism, thereby cleaning and scraping the slag on the filter, solving the problem of filter blockage and ensuring the efficiency of boiler combustion ventilation.

[0008] Preferably, the transmission mechanism includes a transmission plate and a transmission block arranged in the ventilation box, a cavity arranged on the side wall of the ventilation box, a positioning rod and a transmission part arranged in the cavity, and the cavity is connected to the air inlet channel; a slide groove is provided on the inner wall of the cavity, and a sliding block is slidably connected in the slide groove, and the outer end of the sliding block extends into the ventilation box and is fixedly connected to the transmission plate; one end of the positioning rod is rotatably connected to one side wall of the cavity, and the other end passes through the other opposite side wall of the cavity and the transmission plate and is connected to the transmission block; one end of the transmission plate is fixedly connected to the scraper block, and two toggle blocks are arranged at intervals on the other end, and the transmission block is arranged between the two toggle blocks and cooperates with the two toggle blocks; the transmission rod is connected to the positioning rod through the transmission part, and under the action of the transmission part, the positioning rod rotates and drives the transmission block to rotate, so that the transmission plate moves along the slide groove and drives the scraper block to move along the inner surface of the filter screen. The transmission plate is fixed and guided by setting a slide groove and a sliding block. The fan blades rotate under the action of fresh air, causing the transmission rod to rotate, and the positioning rod and the transmission block are driven to rotate through the transmission part. The toggle block drives the transmission plate to move along the slide groove under the force exerted by the transmission block when it rotates, so that the scraper block moves along the inner surface of the filter screen to clean the slag.

[0009] Specifically, the transmission block is provided with three protrusions, and the two toggle blocks are symmetrically arranged along the length direction of the transmission plate; when the transmission block rotates, the three protrusions intermittently apply force to the two toggle blocks, so that the transmission plate moves along the slide groove.

[0010] Preferably, the transmission part includes a synchronous belt, a first synchronous wheel connected to the positioning rod, and a second synchronous wheel connected to the transmission rod, and the first synchronous wheel and the second synchronous wheel are connected by a synchronous belt. The transmission rod drives the first synchronous wheel to rotate through the second synchronous wheel and the synchronous belt, thereby driving the positioning rod to rotate.

[0011] Preferably, a protective cover is provided on the inner side wall of the ventilation box, and the transmission plate and the toggle block are both arranged in the protective cover; one end of the transmission plate is arranged in the protective cover, and the other end penetrates the side wall of the protective cover and is connected to the scraper block. The protective cover can shield and protect the part of the transmission mechanism located in the ventilation box to prevent the falling slag from affecting the operation of the transmission mechanism.

[0012] Preferably, the opposite side walls of the ventilation box are provided with air inlet channels, the opposite inner side walls of the ventilation box are provided with downwardly inclined feed plates, and the feed plates are arranged below the filter screen; the inner bottom wall of the ventilation box is provided with a guide block, and the guide block is provided with two inclined guide surfaces, which are arranged opposite to the feed plate. Through the cooperation of the feed plate and the guide block, it is convenient to guide and collect the scraped and dropped slag, and prevent the slag from being blown back into the boiler in reverse.

[0013] Specifically, a dust removal port is provided on the bottom wall of the fume box, and the dust removal port is arranged on both sides of the material guide block; a sealing block is provided at the dust removal port, and the sealing block is rotatably connected to the fume box. The dust removal port and the sealing block cooperate to facilitate the regular removal and cleaning of the slag that falls into the fume box. When a certain amount of slag is accumulated at the dust removal port, the sealing block is opened, and the slag is discharged through the dust removal port. After the slag is discharged, the sealing block is closed.

[0014] Preferably, the scraping block is provided with bristles, and the bristles abut against the filter screen. The cleaning efficiency of the filter screen can be improved by providing the bristles.

[0015] Specifically, a mesh plate is provided on the top of the ventilation box, and a sealing gasket is provided at the connection between the mesh plate and the ventilation box; a mounting block is provided on the outer wall of the ventilation box, and at least one mounting hole is provided on the mounting block. The mesh plate can prevent large pieces of slag and coal from falling into the interior of the ventilation box, and the sealing gasket can improve the sealing performance. The mounting block and the mounting hole are provided to facilitate the installation of the ventilation box on the boiler.

[0016] Based on the same inventive concept, the utility model also provides a boiler ventilation system, including a fan, a transmission pipe, a boiler and the ventilation device as described above, the air outlet of the fan is connected to the input end of the transmission pipe; the output end of the transmission pipe is connected to the air inlet channel, and the bottom of the boiler is connected to the inner cavity of the ventilation box.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The ventilation device and boiler ventilation system of the utility model can clean and scrape the slag on the filter screen during ventilation, thereby solving the problem of filter screen blockage and ensuring the efficiency of boiler combustion ventilation.

[0019] 2. The ventilation device and boiler ventilation system of the utility model can shield the part of the transmission mechanism located in the ventilation box by setting a protective cover to prevent the falling slag from affecting the operation of the transmission mechanism, and through the cooperation of the discharge plate and the guide block, it is convenient to guide and collect the scraped and fallen slag, and prevent the slag from being blown back into the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the ventilation device of the utility model;

[0021] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the central ventilation box;

[0022] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of the protective cover inside the central ventilation box;

[0023] Figure 4 for Figure 1 Another schematic diagram of the cross-section structure of the central ventilation box;

[0024] Figure 5 for Figure 3 Schematic diagram of the separation structure of the transmission plate and the transmission block.

[0025] In the figure:

[0026] 1-ventilation box; 2-air inlet channel; 3-fixed block; 4-filter screen; 5-transmission rod; 6-fan blades; 7-transmission mechanism; 71-cavity; 72-positioning rod; 73-transmission block; 731-bump; 74-first synchronous wheel; 75-synchronous belt; 76-transmission plate; 77-sliding block; 78-second synchronous wheel; 79-slide groove; 710-sliding block; 8-mesh plate; 9-protective cover; 10-unloading plate; 11-guide block; 12-sealing block; 13-installation block; 14-scraping block. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following text, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0028] like Figure 1 As shown, a ventilation device provided in this embodiment includes a ventilation box 1, and air inlet channels 2 are opened on the opposite side walls of the ventilation box 1. A mounting block 13 is provided on the outer wall of the ventilation box 1, and two mounting holes are provided on the mounting block 13. Through the cooperation of the mounting block 13 and the mounting holes, it is convenient to install the ventilation box 1 on the boiler. A mesh plate 8 is provided on the top of the ventilation box 1, and a sealing gasket is provided at the connection between the mesh plate 8 and the ventilation box 1. By providing the mesh plate 8, large pieces of slag and coal can be prevented from falling into the interior of the ventilation box 1. As shown Figure 2 As shown, the air inlet channel 2 is connected to the inner cavity of the ventilation box 1, and a filter screen 4 is provided at the connection point. A fixing block 3 is fixedly connected to the inner wall of the air inlet channel 2, and a fan blade 6 is provided between the fixing block 3 and the filter screen 4. The fan blade 6 is rotatably connected to the fixing block 3 through a transmission rod 5.

[0029] like Figure 2As shown, a transmission mechanism 7 is provided in the ventilation box 1, and the transmission mechanism 7 includes a transmission plate 76 and a transmission block 73 provided in the ventilation box 1, a cavity 71 provided on the side wall of the ventilation box 1, and a positioning rod 72, a first synchronous wheel 74, a synchronous belt 75, and a second synchronous wheel 78 provided in the cavity 71, and the cavity 71 is connected with the air inlet channel 2. A slide groove 79 is provided on the inner wall of the cavity 71, and a sliding block 710 is slidably connected in the slide groove 79, and the outer end of the sliding block 710 extends into the ventilation box 1 and is fixedly connected to the transmission plate 76. One end of the positioning rod 72 is rotatably connected to one side wall of the cavity 71, and the other end passes through the other opposite side wall of the cavity 71 and the transmission plate 76 and is connected to the transmission block 73. As shown Figure 5 As shown, two toggle blocks 77 are fixedly connected to the side opposite to the transmission plate 76 and the transmission block 73. The two toggle blocks 77 are symmetrically arranged along the length direction of the transmission plate 76. The bottom end of the transmission plate 76 is fixedly connected to the scraper block 14. The scraper block 14 is provided with bristles, which abut against the filter screen 4. The transmission block 73 is provided with three protrusions 731, which cooperate with the two toggle blocks 77. When the transmission block 73 rotates, the three protrusions 731 intermittently apply force to the two toggle blocks 77. Figure 4 As shown, the positioning rod 72 is fixedly connected to a first synchronous wheel 74, and the transmission rod 5 is fixedly connected to a second synchronous wheel 78. The first synchronous wheel 74 is connected to the second synchronous wheel 78 through a synchronous belt 75. Figure 3 and Figure 4 As shown, the inner wall of the ventilation box 1 is fixedly connected with a protective cover 9, the transmission plate 76 and the toggle block 77 are both arranged in the protective cover 9, and a through slot adapted to the transmission plate 76 is provided at the bottom of the protective cover 9. One end of the transmission plate 76 is arranged in the protective cover 9, and the other end passes through the through slot of the protective cover 9 and is connected to the scraper block 14. By providing the protective cover 9, the part of the transmission mechanism 7 located in the ventilation box 1 can be shielded to prevent the falling slag from affecting the operation of the transmission mechanism 7.

[0030] like Figure 2 and Figure 3 As shown, the opposite inner side walls of the ventilation box 1 are fixedly connected with downwardly inclined material discharge plates 10, which are arranged below the filter screen 4. The inner bottom wall of the ventilation box 1 is fixedly connected with a material guide block 11, which is conical and has two inclined material guide surfaces, which are arranged opposite to the material discharge plate 10. Figure 4 As shown, a cleaning port is provided at the bottom of the fume box 1, and the cleaning port is arranged on both sides of the guide block 11. The inner side wall of the cleaning port is rotatably connected to a sealing block 12 via a rotating shaft. Through the cooperation of the unloading plate 10 and the guide block 11, it is convenient to guide and collect the scraped and dropped slag, and prevent the slag from being blown back into the boiler. Through the cooperation of the cleaning port and the sealing block 12 therein, it is convenient to regularly remove and clean the slag that falls into the fume box 1.

[0031] This embodiment also provides a boiler ventilation system, including a fan, a transmission pipe, a boiler and the above ventilation device, wherein the air outlet of the fan is connected to the input end of the transmission pipe. The output end of the transmission pipe is connected to the air inlet channel 2, and the bottom of the boiler is connected to the inner cavity of the ventilation box 1.

[0032] During operation, the fan is started to blow fresh air into the ventilation box 1 and then into the boiler. The heavier slag that falls is protected and filtered through the filter screen 4. At the same time, the fresh air blown in by the fan acts on the fan blades 6 and drives the fan blades 6 to rotate. The fan blades 6 drive the transmission rod 5 to rotate. The transmission rod 5 drives the first synchronous wheel 74 to rotate through the second synchronous wheel 78 and the synchronous belt 75. Then the first synchronous wheel 74 drives the transmission block 73 to rotate through the positioning rod 72. Three protrusions 731 are provided on the transmission block 73. During the rotation of the transmission block 73, the three protrusions 731 intermittently apply force to two symmetrically distributed toggle blocks 77, so that the transmission plate 76 drives the scraper block 78 to move up and down, so that the bristles on the scraper block 78 scrape and clean the slag attached to the filter screen 4, thereby ensuring the efficiency of ventilation and combustion.

[0033] The contents explained in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the embodiments by those skilled in the art fall within the scope defined by the claims attached to the present invention.

Claims

1. A ventilation device, comprising a ventilation box (1), wherein at least one side wall of the ventilation box (1) is provided with an air inlet channel (2), the air inlet channel (2) is connected to the inner cavity of the ventilation box (1), and a filter screen (4) is provided at the connection point; characterized in that: A fixed block (3) is provided in the air inlet channel (2), a fan blade (6) is provided between the fixed block (3) and the filter screen (4), and the fan blade (6) and the fixed block (3) are rotatably connected via a transmission rod (5); A scraping block (14) is provided on the inner surface of the filter screen (4). The scraping block (14) is connected to the transmission rod (5) via a transmission mechanism (7). Under the action of the transmission mechanism (7), the scraping block (14) moves in contact with the inner surface of the filter screen (4).

2. The ventilation device according to claim 1, characterized in that: The transmission mechanism (7) comprises a transmission plate (76) and a transmission block (73) arranged in the ventilation box (1), a cavity (71) arranged on the side wall of the ventilation box (1), a positioning rod (72) and a transmission part arranged in the cavity (71), and the cavity (71) is connected to the air inlet channel (2); a slide groove (79) is provided on the inner side wall of the cavity (71), and a sliding block (710) is slidably connected in the slide groove (79), and the outer end of the sliding block (710) extends into the ventilation box (1) and is fixedly connected to the transmission plate (76); one end of the positioning rod (72) is rotatably connected to a side wall of the cavity (71), and the other end of the positioning rod (72) is rotatably connected to a side wall of the cavity (71). One end portion passes through the other opposite side wall of the cavity (71) and the transmission plate (76) and is connected to the transmission block (73); one end of the transmission plate (76) is fixedly connected to the scraper block (14), and two toggle blocks (77) are arranged at intervals on the other end, and the transmission block (73) is arranged between the two toggle blocks (77) and cooperates with the two toggle blocks (77); the transmission rod (5) is connected to the positioning rod (72) through a transmission part, and under the action of the transmission part, the positioning rod (72) rotates and drives the transmission block (73) to rotate, so that the transmission plate (76) moves along the slide groove (79) and drives the scraper block (14) to move along the inner surface of the filter screen (4).

3. The ventilation device according to claim 2, characterized in that: The transmission block (73) is provided with three protrusions (731), and the two toggle blocks (77) are symmetrically arranged along the length direction of the transmission plate (76); when the transmission block (73) rotates, the three protrusions (731) intermittently apply force to the two toggle blocks (77), so that the transmission plate (76) moves along the slide groove (79).

4. The ventilation device according to claim 2, characterized in that: The transmission part comprises a synchronous belt (75), a first synchronous wheel (74) connected to the positioning rod (72), and a second synchronous wheel (78) connected to the transmission rod (5); the first synchronous wheel (74) and the second synchronous wheel (78) are connected via the synchronous belt (75).

5. The ventilation device according to claim 2, characterized in that: A protective cover (9) is provided on the inner side wall of the ventilation box (1), and a transmission plate (76) and a toggle block (77) are both arranged inside the protective cover (9); one end of the transmission plate (76) is arranged inside the protective cover (9), and the other end penetrates through the side wall of the protective cover (9) and is connected to a scraper block (14).

6. The ventilation device according to claim 1, characterized in that: The opposite side walls of the ventilation box (1) are provided with air inlet channels (2), and the opposite inner side walls of the ventilation box (1) are provided with downwardly inclined material discharge plates (10), and the material discharge plates (10) are arranged below the filter screen (4); the inner bottom wall of the ventilation box (1) is provided with a material guide block (11), and the material guide block (11) is provided with two inclined material guide surfaces, and the material guide surfaces are arranged opposite to the material discharge plate (10).

7. The ventilation device according to claim 6, characterized in that: The bottom wall of the ventilation box (1) is provided with a debris removal opening, which is arranged on both sides of the material guide block (11); a sealing block (12) is provided at the debris removal opening, and the sealing block (12) is rotatably connected to the ventilation box (1).

8. The ventilation device according to any one of claims 1 to 7, characterized in that: The scraping block (14) is provided with bristles, and the bristles abut against the filter screen (4).

9. The ventilation device according to any one of claims 1 to 7, characterized in that: A mesh plate (8) is provided on the top of the ventilation box (1), and a sealing gasket is provided at the connection between the mesh plate (8) and the ventilation box (1); a mounting block (13) is provided on the outer wall of the ventilation box (1), and at least one mounting hole is provided on the mounting block (13).

10. A boiler ventilation system, comprising a fan, a transmission pipe and a boiler, wherein the air outlet of the fan is connected to the input end of the transmission pipe; characterized in that: It also includes a ventilation device as claimed in any one of claims 1 to 9, wherein the output end of the transmission pipe is connected to the air inlet channel (2), and the bottom of the boiler is connected to the inner cavity of the ventilation box (1).

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