CN218972106U

CN218972106U - Pipeline coupling mechanism and coal-fired power plant boiler bellows

Info

Publication number: CN218972106U
Application number: CN202222856319.7U
Authority: CN
Inventors: 明小林; 缪淼; 何磊; 王大志; 何春林; 张进; 晁晓波
Original assignee: Guizhou Dafang Power Generation Co ltd; Dongfang Boiler Group Co Ltd
Current assignee: Guizhou Dafang Power Generation Co ltd; Dongfang Boiler Group Co Ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-05-05
Anticipated expiration: 2032-10-28

Abstract

The utility model discloses a pipeline connecting mechanism and a coal-fired power plant boiler bellows, which comprise a connecting assembly, and comprise an air inlet pipe, a filter element, a connecting pipe, a first fixing pipe, a limiting piece and a fastening piece, wherein the filter element is fixed at the end part of the air inlet pipe, the connecting pipe is arranged at one side of the filter element, the first fixing pipe is arranged at the end part of the connecting pipe, the limiting piece is arranged on the connecting pipe, and the fastening piece is arranged on the connecting pipe and is matched with the limiting piece. According to the utility model, the connection between the air supply pipeline and the fan pipeline is more convenient and stable through the connecting component, and the fan pipeline can be installed and disassembled only through one rotating action, so that the working efficiency is higher compared with the working efficiency in the prior art through a flange or welding mode.

Description

Pipeline coupling mechanism and coal-fired power plant boiler bellows

Technical Field

The utility model relates to the technical field of coal-fired power plant boiler bellows, in particular to a pipeline connecting mechanism and a coal-fired power plant boiler bellows.

Background

The coal-fired boiler is coal burned by fuel, steam is generated or the coal heat is changed into hot water after being converted, but not all the heat is fully and effectively converted, and a part of the heat is not consumed in a reactive mode, so that the efficiency problem exists, generally, the larger boiler efficiency is higher, between 60% and 80%, the combustion efficiency of the burner is improved by arranging a bellows in the using process of the coal-fired boiler, the air supply pipeline of the bellows of the boiler in the prior art is generally connected between the external fan pipeline by a flange or welding and the like, the disassembly of the air supply pipeline of the bellows of the boiler in the prior art is very inconvenient when the boiler is overhauled or cleaned, the working efficiency of workers is influenced, meanwhile, the oxygen concentration of the two side areas of the hearth is high in a long-term operation, the oxygen concentration of the middle area of the hearth is low, the middle area of the hearth is in a wind lack state, so that the flame combustion is delayed, the middle area is not fully combusted, the combustion efficiency is low, the horizontal flue is high/the ash deposition is serious, the CO concentration in the smoke is high, and the like, and the economical efficiency, stability and the stability and safety of the boiler combustion are seriously influenced.

Disclosure of Invention

This section is intended to outline some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description summary and in the title of the application, to avoid obscuring the purpose of this section, the description summary and the title of the utility model, which should not be used to limit the scope of the utility model.

The present utility model has been made in view of the above and/or problems occurring in the prior art pipe connection and the windbox of a coal-fired utility boiler.

Therefore, the problem to be solved by the utility model is that the air supply pipeline of the boiler bellows in the prior art is generally connected with the external fan pipeline by a flange or welding mode, so that the disassembly is very inconvenient during the overhaul or cleaning, and the working efficiency of staff is affected.

In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a pipeline coupling mechanism, its includes, coupling assembling, including air-supply line, filter, connecting pipe, first fixed pipe, locating part and fastener, the filter be fixed in the air-supply line tip, the connecting pipe set up in filter one side, first fixed pipe set up in the connecting pipe tip, the locating part set up in on the connecting pipe, the fastener set up in on the connecting pipe, and with the locating part cooperation.

As a preferred embodiment of the pipe connection mechanism of the present utility model, wherein: the filter piece comprises a mounting box and a filter screen, wherein the mounting box is fixed at the end part of the air inlet pipe, and the filter screen is arranged in the mounting box.

As a preferred embodiment of the pipe connection mechanism of the present utility model, wherein: the filter piece further comprises a clamping plate, wherein the clamping plate is fixed on the inner top wall and the inner bottom wall of the mounting box, and the filter screen is positioned on the inner side of the clamping plate.

As a preferred embodiment of the pipe connection mechanism of the present utility model, wherein: the connecting assembly further comprises a sealing ring, wherein the sealing ring is fixed in the first fixed pipe, and one end of the sealing ring is positioned in the connecting pipe.

As a preferred embodiment of the pipe connection mechanism of the present utility model, wherein: the connecting assembly further comprises guide rods which are fixed on two sides of one end of the first fixed pipe, guide grooves are formed in the connecting pipes, and the guide rods are inserted into the guide grooves.

As a preferred embodiment of the pipe connection mechanism of the present utility model, wherein: the limiting piece comprises an inserting block, a second fixing pipe and a limiting block, wherein the inserting block is fixed at the end part of the first fixing pipe, a slot is formed in one end of the connecting pipe, the inserting block is inserted into the slot, the second fixing pipe is fixed at the top and the bottom of the connecting pipe, the limiting block slides in the second fixing pipe, a limiting groove is formed in the inserting block, and the limiting block is inserted into the limiting groove.

As a preferred embodiment of the pipe connection mechanism of the present utility model, wherein: the limiting piece further comprises a stop block and a reset spring, wherein the stop block is fixed on two sides of the limiting piece and is positioned in the second fixed pipe, and two ends of the reset spring are respectively fixed with the stop block and the inner wall of the second fixed pipe.

As a preferred embodiment of the pipe connection mechanism of the present utility model, wherein: the fastener comprises a threaded ring and a push ring, wherein the threaded ring is in threaded connection with the connecting pipe, and the push ring is fixed on the side face of the threaded ring.

The utility model has the beneficial effects that: according to the utility model, the connection between the air supply pipeline and the fan pipeline is more convenient and stable through the connecting component, and the fan pipeline can be installed and disassembled only through one rotating action, so that the working efficiency is higher compared with the working efficiency in the prior art through a flange or welding mode.

Therefore, the problems to be solved by the utility model are that the oxygen concentration of the areas at two sides of the hearth is high in long-term operation, and the oxygen concentration of the area in the middle of the hearth is low, so that the middle of the hearth is in a windless state, and the problems of low combustion efficiency, serious ash accumulation at the position of the horizontal flue with high height/high retreating, high concentration in flue gas and the like are caused by delayed flame combustion and insufficient combustion in the middle of the hearth, so that the economy, stability and safety of boiler combustion are seriously affected.

As a preferable scheme of the pipeline connecting mechanism and the coal-fired power plant boiler bellows, the utility model comprises the following steps: the air box assembly comprises a shell, a hearth and a burner, wherein the air inlet pipe is communicated with two sides of the shell, the hearth is fixed in the shell, and the burner is fixed at the top and the bottom of the hearth.

As a preferable scheme of the pipeline connecting mechanism and the coal-fired power plant boiler bellows, the utility model comprises the following steps: the bellows assembly further includes windshields secured to both sides of the top and bottom of the firebox, the windshields dividing the top and bottom of the firebox into a first duct and a second duct.

The utility model has the beneficial effects that: according to the utility model, the wind shield is arranged, so that the wind box can uniformly supply wind to the burners at the two sides and the middle part when supplying wind, and the condition that the burners at the middle part are lack of oxygen and the like is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

FIG. 1 is an overall construction diagram of a duct connection mechanism and a coal-fired power plant boiler bellows.

FIG. 2 is a cross-sectional view of a duct connection and a stop for a coal-fired utility boiler windbox.

FIG. 3 is another view of the piping connection and filter element of the coal-fired utility boiler windbox.

FIG. 4 is another view of the pipe connection and the stop for the windbox of the coal-fired utility boiler.

FIG. 5 is an overall cross-sectional view of the piping connection mechanism and the coal-fired power plant boiler windbox.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 and 2, in a first embodiment of the present utility model, a pipe connection mechanism and a coal-fired power plant boiler bellows are provided, which include a connection assembly 100 for adjoining a fan pipe to a bellows pipe and greatly improving the assembly and disassembly efficiency thereof.

Specifically, the connection assembly 100 includes an air inlet pipe 101, a filter element 102, a connection pipe 103, a first fixing pipe 104, a limiting element 105 and a fastening element 106, wherein the filter element 102 is fixed at the end of the air inlet pipe 101, the connection pipe 103 is arranged at one side of the filter element 102, the first fixing pipe 104 is arranged at the end of the connection pipe 103, the limiting element 105 is arranged on the connection pipe 103, and the fastening element 106 is arranged on the connection pipe 103 and is matched with the limiting element 105.

Wind of the fan enters the air inlet pipe 101 and the air box from the first fixed pipe 104 and the connecting pipe 103, the wind is filtered through the filtering piece 102, excessive dust and other impurities are prevented from entering the air box, the combustion efficiency of the combustor is affected, then the connection between the first fixed pipe 104 and the connecting pipe 103 is more convenient and stable through the limiting piece 105 and the fastening piece 106, and when the operation of overhauling or cleaning the air box is required to be removed, the working efficiency is higher.

Example 2

Referring to fig. 2 to 4, this embodiment is based on the previous embodiment, which is a second embodiment of the present utility model.

Specifically, the filter 102 includes a mounting case 102a and a filter screen 102b, the mounting case 102a is fixed to an end portion of the air inlet duct 101, and the filter screen 102b is disposed in the mounting case 102 a.

The installation box 102a is rectangular, and the air entering the air inlet pipe 101 is filtered through the installation box 102a and the filter screen 102b, so that excessive dust and other impurities in the air are prevented from entering the bellows, and the combustion efficiency of the combustor is prevented from being influenced.

The filter 102 further includes a card 102c secured to the inner top and bottom walls of the mounting case 102a, with the filter screen 102b positioned inside the card 102 c.

The clamping plate 102c is used for fixing and limiting the filter screen 102b, so that the filter screen is more firmly installed.

The connection assembly 100 further comprises a sealing ring 107 fixed in the first fixing tube 104, and one end of the sealing ring 107 is located in the connection tube 103.

The sealing ring 107 is located between the first fixing pipe 104 and the connecting pipe 103, and is used for sealing the contact position of the first fixing pipe 104 and the connecting pipe, so as to avoid air leakage and other phenomena in the air supply process.

The connecting assembly 100 further comprises a guide rod 108 fixed on two sides of one end of the first fixing tube 104, a guide groove K is formed in the connecting tube 103, and the guide rod 108 is inserted into the guide groove K.

The first fixing tube 104 is guided and limited by the guide rod 108 and the guide groove K, so that the first fixing tube is more accurate and stable when being mounted on the connecting tube 103.

The limiting piece 105 comprises an inserting block 105a, a second fixed tube 105b and a limiting block 105c, wherein the inserting block 105a is fixed at the end part of the first fixed tube 104, a slot M is formed in one end of the connecting tube 103, the inserting block 105a is inserted into the slot M, the second fixed tube 105b is fixed at the top and the bottom of the connecting tube 103, the limiting block 105c slides in the second fixed tube 105b, a limiting groove N is formed in the inserting block 105a, and the limiting block 105c is inserted into the limiting groove N.

The insert 105a is rectangular, and the connecting pipe 103 is initially positioned through the insert 105a and the slot M, so that the installation is more convenient and stable, and the insert 105a is fixed and limited through the limiting block 105c and the limiting groove N, so that the insert is prevented from being separated from the slot M, the first fixing pipe 104 is further fixed, and the connecting pipe 103 is prevented from being separated in the using process.

The limiting member 105 further comprises a stop block 105d and a return spring 105e, wherein the stop block 105d is fixed on two sides of the limiting block 105c and is positioned in the second fixed tube 105b, and two ends of the return spring 105e are respectively fixed with the stop block 105d and the inner wall of the second fixed tube 105 b.

The stopper 105d is used for limiting the stopper 105c, preventing the stopper 105c from being separated from the second fixing tube 105b, and the reset spring 105e applies a force to the stopper 105c for moving outwards, that is, in an initial state, the stopper 105c is located outside the slot M, so that the insert 105a can be more conveniently inserted into the slot M.

The fastener 106 includes a threaded ring 106a and a push ring 106b, the threaded ring 106a is screwed on the connection pipe 103, and the push ring 106b is fixed to a side surface of the threaded ring 106 a.

The connecting pipe 103 is provided with threads, the threaded ring 106a is in threaded connection with the connecting pipe 103 through the threads, when the push ring 106b moves towards the direction of the second fixed pipe 105b, the limit block 105c can be pushed inwards, the limit block 105c is inserted into the slot M, and the inner side, in contact with the limit block 105c, of the push ring 106b is subjected to chamfering treatment, so that the limit block 105c can be pushed inwards more conveniently.

Example 3

Referring to fig. 5, a third embodiment of the present utility model is based on the first two embodiments.

Specifically, the bellows assembly 200 includes a housing 201, a furnace 202, and a burner 203, wherein the air inlet pipe 101 is communicated with two sides of the housing 201, the furnace 202 is fixed in the housing 201, and the burner 203 is fixed at the top and bottom of the furnace 202.

Neither the furnace 202 nor the burner 203 is of prior art and will not be described in detail herein.

The windbox assembly 200 also includes windshields 204 secured to both the top and bottom sides of the firebox 202, the windshields 204 dividing the top and bottom portions of the firebox 202 into a first duct J1 and a second duct J2.

The wind guard 204 is L-shaped, and the first air duct J1 is located outside the wind guard 204 and used for independently supplying air to the middle burner, and the second air duct J2 is used for supplying air to the burners on two sides, so that the conditions of oxygen deficiency and the like of the middle burner are greatly avoided, and the combustion efficiency is influenced.

When the fixing device is used, the first fixing tube 104 is arranged at one end of the connecting tube 103, the guide rod 108 is inserted into the guide groove K, the inserting block 105a is inserted into the inserting groove M, the first fixing tube 104 is pre-fixed through the guide rod 108 and the inserting block 105a, the fixing device is more convenient to install, then the threaded ring 106a is manually rotated, the threaded ring 106a and the push ring 106b move towards the direction of the second fixing tube 105b, at the moment, the limit block 105c is pushed inwards through the push ring 106b, the limit block 105c is inserted into the limit groove N, and the limit block 105c can be fixed through the threaded ring 106a and the push ring 106b, and the first fixing tube 104 is further fixed through the limit block 105c, so that the fixing device is more convenient and stable to install.

It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present utility model may be modified or substituted without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered in the scope of the claims of the present utility model.

Claims

1. A pipe connection mechanism, characterized in that: comprising the steps of (a) a step of,

coupling assembling (100), including air-supply line (101), filter element (102), connecting pipe (103), first fixed pipe (104), locating part (105) and fastener (106), filter element (102) are fixed in air-supply line (101) tip, connecting pipe (103) set up in filter element (102) one side, first fixed pipe (104) set up in connecting pipe (103) tip, locating part (105) set up in on connecting pipe (103), fastener (106) set up in on connecting pipe (103), and with locating part (105) cooperation.

2. The pipe coupling according to claim 1, wherein: the filter (102) comprises a mounting box (102 a) and a filter screen (102 b), wherein the mounting box (102 a) is fixed at the end part of the air inlet pipe (101), and the filter screen (102 b) is arranged in the mounting box (102 a).

3. The pipe coupling according to claim 2, wherein: the filter element (102) further comprises a clamping plate (102 c) which is fixed to the inner top wall and the inner bottom wall of the mounting box (102 a), and the filter screen (102 b) is located on the inner side of the clamping plate (102 c).

4. A pipe connection according to claim 2 or 3, wherein: the connecting assembly (100) further comprises a sealing ring (107) which is fixed in the first fixed pipe (104), and one end of the sealing ring (107) is positioned in the connecting pipe (103).

5. The pipe coupling according to claim 4, wherein: the connecting assembly (100) further comprises a guide rod (108) which is fixed on two sides of one end of the first fixed pipe (104), a guide groove (K) is formed in the connecting pipe (103), and the guide rod (108) is inserted into the guide groove (K).

6. The pipe coupling according to claim 5, wherein: the limiting piece (105) comprises a plug block (105 a), a second fixed pipe (105 b) and a limiting block (105 c), wherein the plug block (105 a) is fixed at the end part of the first fixed pipe (104), a slot (M) is formed in one end of the connecting pipe (103), the plug block (105 a) is inserted into the slot (M), the second fixed pipe (105 b) is fixed at the top and the bottom of the connecting pipe (103), the limiting block (105 c) slides in the second fixed pipe (105 b), a limiting groove (N) is formed in the plug block (105 a), and the limiting block (105 c) is inserted into the limiting groove (N).

7. The pipe coupling according to claim 6, wherein: the limiting piece (105) further comprises a stop block (105 d) and a return spring (105 e), the stop block (105 d) is fixed on two sides of the limiting block (105 c) and is positioned in the second fixing tube (105 b), and two ends of the return spring (105 e) are respectively fixed with the stop block (105 d) and the inner wall of the second fixing tube (105 b).

8. The pipe coupling according to claim 6 or 7, wherein: the fastener (106) comprises a threaded ring (106 a) and a push ring (106 b), wherein the threaded ring (106 a) is in threaded connection with the connecting pipe (103), and the push ring (106 b) is fixed on the side face of the threaded ring (106 a).

9. A coal-fired power plant boiler bellows, characterized in that: comprising a pipe connection according to any one of claims 1-8, and

bellows subassembly (200), including shell (201), furnace (202) and combustor (203), air-supply line (101) with shell (201) both sides intercommunication, furnace (202) are fixed in shell (201), combustor (203) are fixed in furnace (202) top and bottom.

10. The coal-fired utility boiler windbox according to claim 9, wherein: the bellows assembly (200) further includes windshields (204) secured to both sides of the top and bottom of the firebox (202), the windshields (204) dividing the top and bottom of the firebox (202) into a first air duct (J1) and a second air duct (J2).