CN214249690U

CN214249690U - Air supply device and thermal power generating unit

Info

Publication number: CN214249690U
Application number: CN202022536401.2U
Authority: CN
Inventors: 姜宏伟; 李文东; 姬海峰; 吕景文; 康君; 尚卫军
Original assignee: Xilingol Thermal Power Co Ltd
Current assignee: Xilingol Thermal Power Co Ltd
Priority date: 2020-11-05
Filing date: 2020-11-05
Publication date: 2021-09-21
Anticipated expiration: 2030-11-05

Abstract

The utility model provides an air supply arrangement and thermal power generating unit relates to thermal power generation technical field. The air supply device is applied to a thermal power generating unit and comprises a first air supply pipe, a second air supply pipe and a driving assembly, wherein the two ends of the first air supply pipe are respectively a first air inlet end and a first air outlet end; the first gas transmission pipe comprises a gas inlet pipe section and a gas transmission pipe section from the first gas inlet end to the first gas outlet end in sequence, and the pipe wall of the gas inlet pipe section is provided with a vent hole. The thermal power generating unit comprises an air preheater and the air supply device, wherein the second air outlet end of the air supply device is communicated with the air inlet end of the air preheater. When the air supply device operates, the vibration and the noise generated by the first air delivery pipe are small, and accordingly, the operation stability of the air supply device is good.

Description

Air supply device and thermal power generating unit

Technical Field

The utility model relates to a thermal power technology field particularly, relates to an air supply arrangement and thermal power generating unit.

Background

Thermal power generation is a power generation mode that thermal energy generated by combustible materials during combustion is converted into electric energy through a power generation power device. Specifically, in the thermal power generating unit, fuel is used for heating water in a furnace chamber of a boiler, so that the water is heated to generate steam to drive a steam turbine to do work, and mechanical energy is converted into electric energy.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an air supply arrangement and thermal power generating unit to when solving the air supply arrangement operation among the current thermal power generating unit, the equal great technical problem of vibration and noise that its pipeline entry end produced.

In order to solve the above problems, the utility model provides an air supply device, be applied to thermal power generating unit, including first gas-supply pipe, second gas-supply pipe and drive assembly, the both ends of first gas-supply pipe are first inlet end and first end of giving vent to anger respectively, the both ends of second gas-supply pipe are second inlet end and second end of giving vent to anger respectively, drive assembly is connected between the first end of giving vent to anger and the second end of giving vent to anger, drive assembly is used for driving external gas to flow in from the first inlet end, and flow out from the second end of giving vent to anger;

the first gas transmission pipe comprises a gas inlet pipe section and a gas transmission pipe section from a first gas inlet end to a first gas outlet end in sequence, and the pipe wall of the gas inlet pipe section is provided with a vent hole.

Optionally, the number of the vent holes is multiple, and the vent holes are arranged at intervals along the circumferential direction of the air inlet pipe section.

Optionally, the number of the vent holes is four, every two vent holes are in one group, two groups of the vent holes are respectively located on the side walls of the two opposite sides of the air inlet pipe section, and the two groups of the vent holes correspond to each other one by one.

Optionally, the air supply device further includes a fan heater, and the fan heater is mounted on the pipe section of the air inlet pipe section between the vent hole and the first air inlet end.

Optionally, a silencer is arranged in the gas transmission pipe section.

Optionally, the vent hole is a straight hole, and the vent hole is inclined from the inner end to the outer end toward the first air intake end.

Optionally, the vent hole is detachably plugged with a plugging head.

Optionally, the air supply device further comprises a base and a vibration damping frame, the vibration damping frame comprises a connecting ring, a vibration damping ring and a support body, the bottom end of the support body is fixedly connected to the base, and the top end of the support body is fixedly connected to the connecting ring; the connecting ring is sleeved on the air inlet pipe section, and the vibration reduction ring is clamped between the air inlet pipe section and the connecting ring; the driving component is fixedly arranged on the base.

Optionally, the air supply device further comprises a connecting piece and a vibration damping piece, the vibration damping piece comprises a first vibration damping seat, a second vibration damping seat and a connecting column connected between the first vibration damping seat and the second vibration damping seat, the vibration damping piece is provided with a connecting hole, and the connecting hole penetrates through the first vibration damping seat, the connecting column and the second vibration damping seat; the bottom end of the bracket body is fixedly connected with a connecting lug, the connecting lug is provided with a clamping groove, and the clamping groove is matched and clamped with the connecting column; the connecting piece penetrates through the connecting hole to be connected with the base.

The utility model also provides a thermal power generating unit, including air heater and above-mentioned air supply arrangement, air supply arrangement's second give vent to anger the end with air heater's inlet end intercommunication.

The utility model provides an among the air supply arrangement, the setting of air vent can increase the intake area of first gas-supply pipe, under the same pressure differential, can effectively reduce the air current and flow into the first inlet end velocity of flow to reduce the disturbance that the air current caused at first inlet end, vibration and noise pollution that the first inlet end of corresponding reduction first gas-supply pipe produced improve air supply arrangement's operating stability and operating personnel's use travelling comfort. In addition, the air vent is arranged on the side wall of the air inlet pipe section in the first air delivery pipe, then the distance between the air vent and the first air inlet end is short, on the basis of ensuring the air inlet area of the first air delivery pipe to be increased, the balance of the internal and external pressure difference of the air vent and the first air inlet end is enhanced, so that the air flow speed of the air vent and the first air inlet end is ensured to be small, the disturbance generated by the air flows at two positions is correspondingly ensured to be small, and the vibration and noise pollution generated by the first air delivery pipe are further reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic view of an air supply device provided by the present invention;

fig. 2 is a schematic cross-sectional view of the connection lug, the damping member and the base of the air supply device provided by the present invention connected by the connecting member;

fig. 3 is an explosion diagram of the connection lug and the damping member in the air supply device provided by the present invention.

Description of reference numerals:

100-a first gas delivery pipe; 110-a first air intake end; 120-a first outlet end; 130-an air inlet pipe section; 140-a gas transmission pipe section; 150-a vent; 200-a drive assembly; 210-a motor; 220-an impeller; 230-a housing; 300-a second air delivery conduit; 310-a second air intake end; 320-a second outlet end; 400-air heater; 500-a muffler; 600-a base; 700-a damping member; 710-a first damping mount; 720-connecting column; 730-a second damping mount; 740-connecting holes; 810-connecting lugs; 820-card slot; 900-connecting piece.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment provides an air supply device, which is applied to a thermal power generating unit, and as shown in fig. 1, the air supply device includes a first air pipe 100, a second air pipe 300 and a driving assembly 200, two ends of the first air pipe 100 are respectively a first air inlet end 110 and a first air outlet end 120, two ends of the second air pipe 300 are respectively a second air inlet end 310 and a second air outlet end 320, the driving assembly 200 is connected between the first air outlet end 120 and the second air inlet end 310, and the driving assembly 200 is used for driving external air to flow in from the first air inlet end 110 and flow out from the second air outlet end 320; the first gas delivery pipe 100 comprises a gas inlet pipe section 130 and a gas delivery pipe section 140 in sequence from the first gas inlet end 110 to the first gas outlet end 120, and the pipe wall of the gas inlet pipe section 130 is provided with vent holes 150.

The embodiment also provides a thermal power generating unit, which comprises an air preheater and the air supply device, wherein the second air outlet end 320 of the air supply device is communicated with the air inlet end of the air preheater.

The air supply device and the thermal power generating unit provided by the embodiment comprise a first air conveying pipe 100 and a second air conveying pipe 300 which are used as air conveying pipelines, and a driving assembly 200 which is used as a power source for driving airflow to flow; the thermal power generating unit comprises an air preheater used for preheating air entering the boiler and the air supply device used for conveying air to the air preheater.

When the air supply device is required to convey air to the air preheater, the driving assembly 200 is started, the driving assembly 200 sucks the air in the first air pipe 100 into a negative pressure state, the air in the surrounding environment flows into the first air pipe 100 through the first air inlet end 110 and the vent hole 150 under the action of pressure difference, then flows through the driving assembly 200 and enters the second air pipe 300, and flows to the air preheater through the second air outlet end 320 to supply air to the air preheater, and the air preheater performs preheating treatment on the flowing air to improve the temperature of the air entering the boiler, so that the combustion efficiency in the boiler is improved. When the driving assembly 200 is operated, part of air of the surrounding environment flows into the first air delivery pipe 100 through the first air inlet end 110, the other part of air flows into the first air delivery pipe 100 through the air holes 150, the air inlet area of the first air delivery pipe 100 can be increased by the arrangement of the air holes 150, the flow velocity of the air flowing into the first air inlet end 110 can be effectively reduced under the same pressure difference, so that the disturbance of the air flowing at the first air inlet end 110 is reduced, the vibration and noise pollution generated by the first air inlet end 110 of the first air delivery pipe 100 are correspondingly reduced, and the operation stability of the air supply device and the use comfort of operators are improved. In addition, the vent hole 150 is located on the side wall of the air inlet pipe section 130 in the first air delivery pipe 100, and the distance between the vent hole 150 and the first air inlet end 110 is relatively short, so that on the basis of ensuring that the air inlet area of the first air delivery pipe 100 is increased, the balance of the internal and external pressure difference between the vent hole 150 and the first air inlet end 110 is enhanced, the air flow velocity at the vent hole 150 and the first air inlet end 110 is ensured to be relatively small, the disturbance generated by the air flows at the two positions is correspondingly ensured to be relatively small, and the vibration and noise pollution generated by the first air delivery pipe 100 is further reduced.

Specifically, the thermal power generating unit of this embodiment can be an ultra-supercritical unit, and the thermal power generating unit can set up a plurality of air supply arrangement as required. The driving assembly 200 may include a housing 230, a motor 210, and an impeller 220 pivotally connected to the interior of the housing 230, wherein a driving end of the motor 210 is connected to the impeller 220 for driving the impeller 220 to rotate; specifically, the air inlet of the housing 230 is connected to the first air outlet end 120 of the first air delivery pipe 100, the air outlet of the housing 230 is connected to the second air inlet end 310 of the second air delivery pipe 300, the motor 210 drives the impeller 220 to rotate, the impeller 220 sucks the inside of the first air delivery pipe 100 into a negative pressure state, and the outside air flows into the first air delivery pipe 100 under the action of the internal and external pressure difference, and then flows through the housing 230 and the second air delivery pipe 300 to deliver air to the air preheater.

Alternatively, in this embodiment, the number of the vent holes 150 may be multiple, and the multiple vent holes 150 are arranged at intervals along the circumferential direction of the air intake pipe section 130. When the air inlet structure is used, external air flow can flow into the first air conveying pipe 100 through the plurality of air holes 150, the air inlet area of the first air conveying pipe 100 can be increased in a certain range due to the arrangement of the plurality of air holes 150, and vibration and noise pollution generated by the first air conveying pipe 100 are reduced. Specifically, the number of the vent holes 150 may be determined according to the diameter of the first air delivery pipe 100 and the negative pressure state in the first air delivery pipe 100 when the driving assembly 200 operates.

Specifically, in the present embodiment, as shown in fig. 1, four vent holes 150 may be provided, each two vent holes 150 are in one group, two groups of vent holes 150 are respectively located on two opposite side walls of the air intake section 130, and the two groups of vent holes 150 are in one-to-one correspondence. Here is a specific arrangement form of the vent hole 150, when the vent hole 150 is processed in the closing of the air intake pipe section 130, two corresponding vent holes 150 can be processed on two sides of the air intake pipe section 130 from one side to the other side at one time, that is, two sets of corresponding holes (four holes) can be obtained by twice hole opening, and the processing convenience is high.

Optionally, in this embodiment, the vent hole 150 is detachably plugged with a plugging head. During processing, the vent holes 150 with a large number can be processed on the side wall of the air inlet pipe section 130, the blocking heads can block the vent holes 150 and can also be detached, the blocking number of the vent holes 150 can be determined according to the running state of the driving assembly 200, and the total air inlet area of the vent holes 150 is correspondingly determined, so that the first air inlet end 110 can be subjected to good vibration reduction and noise reduction effects.

In this embodiment, the vent holes 150 may be straight holes, and the vent holes 150 are inclined from the inner end to the outer end toward the first air inlet end 110. When the driving assembly 200 is operated, a first part of air flows into the air inlet pipe section 130 through the first air inlet end 110 and flows approximately along the axial direction of the air inlet pipe section 130; the second part air current flows in through air vent 150 from outside to inside, and when the air current flowed in into air intake pipe section 130, the flow direction of air current was the contained angle setting between with the first part air current flow direction, and the contained angle is less than 90, and relative air vent 150 sets up with air intake pipe section 130 is perpendicular, and the angle of turning that takes place when the second part air current of this embodiment converges with first part air current is less to reduce the disturbance that the air current converged and produced, and then reduce vibration and noise pollution that air intake pipe section 130 produced.

In this embodiment, as shown in FIG. 1, a silencer 500 may be disposed within gas delivery segment 140. When the airflow passes through the gas transmission pipe section 140, the airflow can be subjected to silencing treatment by the silencer 500, so that noise pollution generated when the air supply device operates is reduced, and the use comfort of operators is improved.

In this embodiment, as shown in fig. 1, the air supply device may further include a fan heater 400, and the fan heater 400 is installed at a section of the air intake section 130 between the vent hole 150 and the first air intake end 110. On one hand, when the thermal power generating unit is in operation, the air heater 400 can preheat air flowing through the air heater to increase the temperature of air entering the air preheater, so that the load of the air preheater is reduced, and the temperature of air entering the boiler is ensured; on the other hand, the vent hole 150 is located downstream of the air heater 400, and the airflow flowing in through the vent hole 150 does not pass through the air heater 400, that is, the airflow flowing in only through the first air inlet 110 flows through the air heater 400, so that on the basis of satisfying the preheating effect, the through flow of the air heater 400 is reduced, and the noise pollution caused by the airflow flowing through the air heater 400 is reduced.

Optionally, in this embodiment, the air supply device may further include a base 600 and a vibration damping frame, the vibration damping frame includes a connecting ring, a vibration damping ring, and a support body, a bottom end of the support body is fixedly connected to the base 600, and a top end of the support body is fixedly connected to the connecting ring; the connecting ring is sleeved on the air inlet pipe section 130, and the vibration reduction ring is clamped between the air inlet pipe section 130 and the connecting ring; the driving assembly 200 is fixedly disposed on the base 600. The vibration reduction frame is fixedly connected between the air inlet pipe section 130 and the base 600, so that the air inlet pipe section 130 is fixed, the air inlet pipe section 130 is connected with a connecting ring of the vibration reduction frame through a vibration reduction ring, the vibration reduction ring is made of flexible vibration reduction materials such as silica gel and rubber, and the air inlet pipe section 130 is not rigidly connected with the connecting ring; when the air supply device operates, the vibration reduction frame can play a role in stabilizing and limiting the air inlet pipe section 130, and the vibration reduction ring can effectively prevent the transmission of vibration, so that the vibration generated by the air inlet pipe section 130 is effectively reduced, and the noise pollution generated by the vibration of the air inlet pipe section 130 is correspondingly reduced.

In this embodiment, as shown in fig. 2 and 3, the air supply device may further include a connecting member 900 and a vibration damping member 700, the vibration damping member 700 includes a first vibration damping seat 710, a second vibration damping seat 730, and a connecting rod 720 connected between the first vibration damping seat 710 and the second vibration damping seat 730, the vibration damping member 700 is provided with a connecting hole 740, and the connecting hole 740 penetrates through the first vibration damping seat 710, the connecting rod 720, and the second vibration damping seat 730; the bottom end of the bracket body is fixedly connected with a connecting lug 810, the connecting lug 810 is provided with a clamping groove 820, and the clamping groove 820 is matched and clamped with the connecting column 720; the connection member 900 is connected to the base 600 through the connection hole 740. Here is a specific form that the bottom end of the bracket body is connected with the base 600, an insertion space is formed between the first vibration damping seat 710 and the second vibration damping seat 730, when the connection lug 810 at the bottom end of the bracket body is matched with the vibration damping member 700, the connection lug 810 is inserted into the insertion space, the connection column 720 between the first vibration damping seat 710 and the second vibration damping seat 730 is clamped into the clamping groove 820 of the connection lug 810, the connection member 900 passes through the connection hole 740 to be connected with the base 600, the connection lug 810 is only contacted with the outer wall of the vibration damping member 700, and is not directly contacted with the connection member 900 and the base 600, i.e. there is no rigid connection between the bracket body and the base 600, so as to ensure that the vibration damping member 700 damps the vibration force transmitted by the bracket body to the air inlet pipe section 130, and further reduce the vibration and noise pollution generated by the operation of the air supply device; the connection position of the connection lug 810 and the vibration damping member 700 can be limited by the matching of the connection column 720 and the clamping groove 820, so that the connection firmness of the connection lug 810 and the vibration damping member 700 is improved. Specifically, the connecting member 900 may be a screw, a hole body is formed in the base 600, the screw passes through the connecting hole 740 and then is screwed into the hole body, and a screw head of the screw presses the first vibration damping seat 710, so that the first vibration damping seat 710 and the second vibration damping seat 730 clamp the engaging lug 810 therebetween, thereby ensuring the firmness of connection between the engaging lug 810 and the base 600.

Optionally, the first air inlet end 110 may further be provided with an air guiding ring extending along the circumferential direction thereof, the cross section of the air guiding ring is arc-shaped, and a convex surface of the air guiding ring is disposed outward. When the airflow flows through the first air inlet end 110, the airflow needs to be guided by the air guide ring, and the convex surface of the air guide ring is a smooth transition arc surface, so that the smoothness of the airflow turning at the first air inlet end 110 is improved, the turbulence formed by the airflow turning at the first air inlet end 110 at a large angle is reduced, and the noise pollution caused by large airflow disturbance is reduced.

Finally, it should also be 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. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An air supply device is applied to a thermal power generating unit and is characterized by comprising a first air conveying pipe (100), a second air conveying pipe (300) and a driving assembly (200), wherein a first air inlet end (110) and a first air outlet end (120) are respectively arranged at two ends of the first air conveying pipe (100), a second air inlet end (310) and a second air outlet end (320) are respectively arranged at two ends of the second air conveying pipe (300), the driving assembly (200) is connected between the first air outlet end (120) and the second air inlet end (310), and the driving assembly (200) is used for driving external air to flow in from the first air inlet end (110) and flow out from the second air outlet end (320);

the first gas transmission pipe (100) sequentially comprises a gas inlet pipe section (130) and a gas transmission pipe section (140) from a first gas inlet end (110) to a first gas outlet end (120), and the pipe wall of the gas inlet pipe section (130) is provided with vent holes (150).

2. The air supply device according to claim 1, wherein the plurality of vent holes (150) are arranged at intervals along a circumferential direction of the air intake pipe section (130).

3. The air supply device according to claim 1, wherein the number of the vent holes (150) is four, each two vent holes (150) are in one group, two groups of the vent holes (150) are respectively located on two opposite side walls of the air intake pipe section (130), and two groups of the vent holes (150) are in one-to-one correspondence.

4. An air supply arrangement according to any one of claims 1-3, further comprising a fan heater (400), and wherein the fan heater (400) is mounted to a section of the air inlet duct (130) located between the vent (150) and the first air inlet end (110).

5. An air supply arrangement according to any of claims 1-3, characterised in that a silencer (500) is arranged in the air duct section (140).

6. An air supply arrangement according to any of claims 1-3, characterized in that the air vent (150) is a straight hole and that the air vent (150) is inclined from an inner end to an outer end towards the first air inlet end (110).

7. An air supply device according to any one of claims 1-3, characterized in that the air vent (150) is detachably plugged with a plugging head.

8. The air supply device according to any one of claims 1-3, further comprising a base (600) and a vibration damping frame, wherein the vibration damping frame comprises a connecting ring, a vibration damping ring and a bracket body, the bottom end of the bracket body is fixedly connected to the base (600), and the top end of the bracket body is fixedly connected to the connecting ring; the connecting ring is sleeved on the air inlet pipe section (130), and the vibration reduction ring is clamped between the air inlet pipe section (130) and the connecting ring; the driving component (200) is fixedly arranged on the base (600).

9. The air supply device of claim 8, further comprising a connecting member (900) and a vibration damping member (700), wherein the vibration damping member (700) comprises a first vibration damping seat (710), a second vibration damping seat (730) and a connecting column (720) connected between the first vibration damping seat (710) and the second vibration damping seat (730), the vibration damping member (700) is provided with a connecting hole (740), and the connecting hole (740) penetrates through the first vibration damping seat (710), the connecting column (720) and the second vibration damping seat (730); a connecting lug (810) is fixedly connected to the bottom end of the support body, a clamping groove (820) is formed in the connecting lug (810), and the clamping groove (820) is matched and clamped with the connecting column (720); the connecting piece (900) passes through the connecting hole (740) and is connected with the base (600).

10. A thermal power generating unit, comprising an air preheater and an air supply device as claimed in any one of claims 1 to 9, wherein the second air outlet (320) of the air supply device is communicated with the air inlet of the air preheater.