CN210196060U - Induced draft device for boiler - Google Patents

Abstract

The utility model relates to a boiler induced air equipment technical field just discloses an induced air device for boiler, which comprises a housing, the left middle part of casing is equipped with the air intake, and the bottom fixed connection of casing has the fan base, the right side of air intake is equipped with the impeller, the impeller is fixed cup jointing with the left end of bearing. The utility model discloses a intercommunication groove of seting up in the bearing, make the inside that the liquid nitrogen in the liquid nitrogen jar passes through connecting pipe and connecting hole entering bearing, avoided the draught fan to arouse the rising of bearing temperature for a long time or unstable operation, the life of bearing has been guaranteed, the economic benefits of draught fan has been improved, and the liquid nitrogen in the bearing utilizes the high low structure in intercommunication groove to flow out from the left end in intercommunication groove, thereby absorb the inside heat of draught fan in a large number, avoided draught fan bulk temperature too high and lead to impeller and bearing etc. to appear warping because of stress, operator's security of the lives and property has been guaranteed, thereby the holistic security of equipment and stability have been improved.

Description

Induced draft device for boiler

Technical Field

The utility model relates to a boiler induced air equipment technical field specifically is an induced air device for boiler.

Background

Along with the application of industrial fan in the boiler trade, boiler fan also more and more receives people's attention, and the draught fan utilizes electric power to make the impeller rotate and produce the negative pressure, and then draws gaseous equipment in the equipment of connection, generally installs at the boiler tail end for draw the hot flue gas in the furnace.

Present boiler draught fan is when using, long-time or unstable operation can lead to the inside bearing temperature rise of draught fan, reduce the life of bearing, and draught fan bulk temperature too high can lead to impeller and bearing etc. to appear warping because of stress, can endanger operator safety when serious, and the impeller is when high-speed rotatory, dust in the boiler flue gas and the incessant friction of impeller can cause the wearing and tearing of impeller, reduce the life of impeller, and can arouse the vibrations of bearing after the impaired impeller loses balance, reduce the holistic stability of draught fan, therefore we provide an induced air device for the boiler.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides an induced draft device for boiler possesses effectual, the impeller life-span of cooling and the high advantage of stability, has solved the problem mentioned among the above-mentioned background art.

The utility model provides a following technical scheme: an air inducing device for a boiler comprises a casing, wherein an air inlet is arranged in the middle of the left side of the casing, a fan base is fixedly connected to the bottom end of the casing, an impeller is arranged on the right side of the air inlet and fixedly sleeved with the left end of a bearing, the right end of the bearing is fixedly sleeved with a motor, a communicating groove is formed in the bearing, a connecting hole located above the right end of the communicating groove is formed in the bearing, a connecting pipe located above the connecting hole is movably sleeved on the bearing, the top end of the connecting pipe is fixedly connected with a liquid nitrogen tank, fixing plates fixedly connected to the two sides of the bottom of the liquid nitrogen tank are respectively movably sleeved with the bearing, the two fixing plates are respectively and fixedly installed on the upper surface of the installing base, an installing block is fixedly connected to the top end of the impeller, a connecting block is fixedly connected to the outer wall of the, the periphery of the rotary table is fixedly connected with the impeller, and an air outlet is formed in the top end of the machine shell.

And carefully selecting, wherein the diameter value of the inner wall of the air inlet is equal to that of the turntable, and the air inlet and the bearing are positioned on the same horizontal position.

Carefully selecting, the left end of bearing is open state, and the right end of bearing is located the right side of intercommunication groove and is the solid form.

And carefully selecting, wherein the opening size of the communicating groove is gradually increased from right to left.

And selecting, wherein the diameter value of the inner wall of the connecting pipe is smaller than that of the connecting hole.

Carefully selecting, the shape of the mounting block is triangular, and the length value of the mounting block is equal to the width value of the impeller.

Compared with the prior art, the utility model discloses possess following beneficial effect:

1. the utility model discloses a intercommunication groove of seting up in the bearing, make the inside that the liquid nitrogen in the liquid nitrogen jar passes through connecting pipe and connecting hole entering bearing, avoided the draught fan to arouse the rising of bearing temperature for a long time or unstable operation, the life of bearing has been guaranteed, the economic benefits of draught fan has been improved, and the liquid nitrogen in the bearing utilizes the high low structure in intercommunication groove to flow out from the left end in intercommunication groove, thereby absorb the inside heat of draught fan in a large number, avoided draught fan bulk temperature too high and lead to impeller and bearing etc. to appear warping because of stress, operator's security of the lives and property has been guaranteed, thereby the holistic security of equipment and stability have been improved.

2. The utility model discloses an establish the top at impeller rotation direction with the installation piece, at first bump with the installation piece and splash to the both sides of installation piece when making the dust in the boiler flue gas and impeller striking, avoided the dust and the impeller friction on a large scale and cause the wearing and tearing of impeller, reduced the degree of wear of impeller, improved the life of impeller to the vibrations that arouse the bearing after having avoided impaired impeller to lose balance have guaranteed the holistic stability of draught fan, the reliability of equipment has been improved.

Drawings

FIG. 1 is a schematic sectional view of the structure of the present invention;

FIG. 2 is a schematic side view of the structure of the present invention;

fig. 3 is a schematic side view of the structure mounting block of the present invention.

In the figure: 1. a housing; 2. an air inlet; 3. a fan base; 4. an impeller; 5. a bearing; 6. a motor; 7. a communicating groove; 8. connecting holes; 9. a connecting pipe; 10. a liquid nitrogen tank; 11. a fixing plate; 12. installing a base; 13. mounting blocks; 14. connecting blocks; 15. a turntable; 16. and (7) air outlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, an induced draft device for a boiler comprises a casing 1, an air inlet 2 is arranged in the middle of the left side of the casing 1, the diameter value of the inner wall of the air inlet 2 is equal to that of a rotary table 15, the air inlet 2 and a bearing 5 are positioned on the same horizontal position, and an impeller 4 is positioned on the right side of the air inlet 2 by the equal diameter value of the air inlet 2 and the rotary table 15 and the correspondence between the air inlet 2 and the bearing 5, thereby avoiding the overheating of the boiler due to insufficient induced draft caused by the leakage of air from the outside when the impeller 4 rotates, ensuring the working efficiency of an induced draft fan, ensuring the normal operation of the boiler, improving the safety and stability of the whole device, a fan base 3 is fixedly connected to the bottom end of the casing 1, the impeller 4 is arranged on the right side of the air inlet 2, the impeller 4 is fixedly sleeved with the left end of the bearing 5, the left end of the bearing 5 is in, the left end of the bearing 5 is in an open state, so that liquid nitrogen entering the communicating groove 7 is enabled to enter the draught fan after overflowing from the left end of the bearing 5, the whole draught fan is cooled by the liquid nitrogen, deformation of an impeller 4, the bearing 5 and the like due to stress action caused by overhigh temperature of the whole draught fan is avoided, the life and property safety of a user is guaranteed, and the safety and the reliability of the draught fan are improved, the right end of the bearing 5 is fixedly sleeved with the motor 6, the communicating groove 7 is formed in the bearing 5, the opening size of the communicating groove 7 is gradually increased from right to left, liquid nitrogen can also flow to the left end of the communicating groove 7 when the bearing 5 rotates at high speed, and then overflows from the inside of the bearing 5 to enter the draught fan, and overhigh temperature of the draught fan caused by the fact that the liquid nitrogen cannot enter the inside of the draught fan, the normal operation of the impeller 4 and the bearing 5 in the draught fan is ensured, the stability of the draught fan is improved, the bearing 5 is provided with the connecting hole 8 which is positioned above the right end of the communicating groove 7, the bearing 5 is movably sleeved with the connecting pipe 9 which is positioned above the connecting hole 8, the diameter value of the inner wall of the connecting pipe 9 is smaller than that of the connecting hole 8, liquid nitrogen can not generate side leakage when entering the communicating groove 7 through the connecting pipe 9 and the connecting hole 8, the low cooling effect of a rotating shaft and the draught fan caused by the side leakage of the liquid nitrogen is avoided, the best cooling effect is ensured after the proper amount of liquid nitrogen enters the rotating shaft and the draught fan, the accuracy and the reliability of the device are improved, the top end of the connecting pipe 9 is fixedly connected with the liquid nitrogen tank 10, the fixing, the two fixing plates 11 are respectively and fixedly installed on the upper surface of the installation base 12, the top end of the impeller 4 is fixedly connected with the installation block 13, the installation block 13 is triangular, the length value of the installation block 13 is equal to the width value of the impeller 4, the triangular shape of the installation block 13 and the length value of the installation block 13 are equal to the width value of the impeller 4, so that dust in boiler flue gas splashes to the two sides of the installation block 13 along the inclination angles of the two sides of the installation block 13 when colliding with the installation block 13, the large-scale friction between the dust and the impeller 4 is avoided, the service life of the impeller 4 is ensured, the vibration of the induced draft fan caused by the unbalance of the damaged impeller 4 is avoided, the stable operation of the induced draft fan is ensured, the stability and the reliability of equipment are improved, the outer wall of the bearing 5 is fixedly connected with the connecting block 14, and the outer wall of the connecting, the periphery of the rotating disc 15 is fixedly connected with the impeller 4, and the top end of the machine shell 1 is provided with an air outlet 16.

The working principle is as follows: opening equipment, motor 6 drives bearing 5 and rotates, bearing 5 drives impeller 4 on the carousel 15 and rotates, make the flue gas in the boiler get into from air intake 2, dust in the boiler flue gas gets into the draught fan inside from the both sides of installation piece 13 after bumping with installation piece 13, then blow off from air outlet 16 through impeller 4's effect, when bearing 5 or draught fan inside temperature were too high, control liquid nitrogen container 10 made the inside that proper amount liquid nitrogen got into intercommunication groove 7 through connecting pipe 9 and connecting hole 8, the liquid nitrogen spills over through the left end of intercommunication groove 7, receive and get into in the draught fan behind the pressure that impeller 4 rotated the production, realize the whole cooling of draught fan, can.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Simultaneously in the utility model discloses an in the drawing, fill the pattern and just do not do any other injecions for distinguishing the picture layer.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides an induced draft device for boiler, includes casing (1), its characterized in that: the left middle part of the casing (1) is provided with an air inlet (2), the bottom of the casing (1) is fixedly connected with a fan base (3), the right side of the air inlet (2) is provided with an impeller (4), the impeller (4) is fixedly sleeved with the left end of a bearing (5), the right end of the bearing (5) is fixedly sleeved with a motor (6), a communicating groove (7) is formed in the bearing (5), the bearing (5) is provided with a connecting hole (8) positioned above the right end of the communicating groove (7), the bearing (5) is movably sleeved with a connecting pipe (9) positioned above the connecting hole (8), the top end of the connecting pipe (9) is fixedly connected with a liquid nitrogen tank (10), two fixing plates (11) fixedly connected with the two sides of the bottom of the liquid nitrogen tank (10) are movably sleeved with the bearing (5) respectively, and the two fixing plates (11) are fixedly installed on the upper surface of an installation base (12) respectively, the top fixedly connected with installation piece (13) of impeller (4), the outer wall fixedly connected with connecting block (14) of bearing (5), the outer wall of connecting block (14) and the inner wall fixed connection of carousel (15), around carousel (15) with impeller (4) fixed connection, the top of casing (1) is equipped with air outlet (16).

2. The draft device for a boiler according to claim 1, wherein: the diameter value of the inner wall of the air inlet (2) is equal to that of the turntable (15), and the air inlet (2) and the bearing (5) are located on the same horizontal position.

3. The draft device for a boiler according to claim 1, wherein: the left end of the bearing (5) is in an open state, and the right end of the bearing (5) is located on the right side of the communicating groove (7) and is in a solid state.

4. The draft device for a boiler according to claim 1, wherein: the size of the opening of the communicating groove (7) is gradually increased from right to left.

5. The draft device for a boiler according to claim 1, wherein: the diameter value of the inner wall of the connecting pipe (9) is smaller than that of the connecting hole (8).

6. The draft device for a boiler according to claim 1, wherein: the mounting block (13) is triangular, and the length value of the mounting block (13) is equal to the width value of the impeller (4).

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