Induced draft fan with mounting structure for power plant boiler

Abstract

The utility model relates to an induced draft fan with an installation structure for a power plant boiler, which comprises an induced draft fan body, an induced draft pipeline is integrally processed on one side of the induced draft fan body, one end of an external pipeline is inserted into the induced draft pipeline, a buckle on the surface of the external pipeline is clamped with a groove in a rotary clamping seat, and the rotary clamping seat is fixed on the induced draft fan body. When the external pipeline is disassembled, the external pipeline is firstly pushed towards the direction of the air inducing pipeline, the fixing frame extrudes the elastic piece, the buckle is separated from a groove in the rotary clamping seat, a hand wheel is rotated to drive a double-threaded rod to rotate, and the external pipeline is disassembled. Therefore, the two pressing plates are driven to slide in the frame body and get close to each other, the pressing plates extrude one end of the rotating clamping base, rotation of the rotating clamping base is achieved, the elastic restorer is extruded, the clamping groove in the rotating clamping base is separated from the clamping and fixing relation with the surface of the buckle, an external pipeline is disassembled, and the induced draft fan is convenient to install and disassemble.

Description

Technical Field

[0001] The utility model relates to the technical field of induced draft fan equipment, in particular to an induced draft fan for a power plant boiler with an installation structure. Background Art

[0002] The function of the induced draft fan is to increase the power of the flue gas flow during the operation of the boiler, so as to ensure that the flue gas can also be discharged into the atmosphere after purification. Therefore, the operation of the induced draft fan directly affects the overall operation quality of the thermal power plant. In the future development of thermal power plants, the induced draft fan needs to be promptly repaired and replaced. The connection between the traditional induced draft fan and the flue is usually threaded, which is complicated and inconvenient for loading and unloading operations.

[0003] A connection structure of an induced draft fan for a power plant boiler that is easy to align and assemble (application number: 201921619396.2), including an induced draft fan body and a pipeline body, a support plate is provided on the top of the induced draft fan body, and a through hole and a first connecting hole are respectively provided on the support plate, and the through hole is provided in the middle of the support plate, a receiving groove is provided inside the support plate, and a connecting spring is installed inside the receiving groove, and the top end of the connecting spring is fixedly connected to the bottom surface of the limit plate, the limit plate is located inside the receiving groove, and a limit frame is fixedly installed on the top surface of the limit plate, and the limit frame passes through the top surface of the support plate; a connecting plate is fixedly installed at the bottom end of the pipeline body, and a second connecting hole is provided on the connecting plate, and the connecting plate is installed above the support plate. In the utility model, the pipeline body is positioned by the snap connection between the connecting plate and the limit frame, which can effectively prevent the pipeline body and the connecting plate from being misaligned, and facilitate the bolt fixing of the connecting plate and the support plate.

[0004] The connection between the conventional induced draft fan and the flue in the above patent is usually threaded, which is complicated and inconvenient for loading and unloading operations. Therefore, we need to provide an induced draft fan for a power plant boiler with an installation structure. Utility Model Content

[0005] The utility model aims to provide an induced draft fan for a power plant boiler with an installation structure, so as to solve the problem in the above background technology that the connection between the traditional induced draft fan and the flue is usually threaded, which is complicated and inconvenient for loading and unloading operations.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an induced draft fan for a power plant boiler with an installation structure, comprising an induced draft fan body, one side of the induced draft fan body is integrally processed with an induced draft duct, one side of the induced draft duct is slidably mounted with an external duct, the front and back sides of the external duct are both mounted with buckles, and the surface of the induced draft duct is mounted with a fixing mechanism adapted to the buckle;

[0007] The fixing mechanism includes a mounting plate, a rotating socket, an elastic resetter and a pressing mechanism. Rotating sockets are provided on both sides of the air duct, and the grooves inside the rotating sockets are snapped into contact with the surface of the buckle. Mounting plates are rotatably installed on the top and bottom of the rotating sockets, and the surface of the mounting plate is fixedly installed on the surface of the air duct. Elastic resetters for restoring the rotating sockets are installed on both sides of the air duct, and a pressing mechanism for simultaneously rotating the two rotating sockets is provided on the top of the air duct.

[0008] Preferably, the pressing mechanism includes a frame, a double-threaded rod, a pressing plate and a handwheel, the frame is fixedly installed on the top of the air duct, the double-threaded rod is rotatably installed inside the frame, pressing plates are threadedly installed on both sides of the surface of the double-threaded rod, the bottoms of the two pressing plates pass through the bottom of the frame and fit with the surface of the rotating base, and the double-threaded rod passes through one side of the frame and is installed with a handwheel.

[0009] Preferably, two pulleys are installed on both sides of the two pressing plates, and the inner wall of the frame is provided with a sliding groove matched with the pulleys.

[0010] Preferably, it also includes an elastic part, which includes a fixed frame, a movable frame, a groove and a spring device. The fixed frame is fixedly installed inside the air duct, and a movable frame is slidably installed at one end of the external duct. Four spring devices are clamped on one side of the external duct through four grooves, and one end of the four spring devices is clamped on the surface of the movable frame.

[0011] Preferably, the bottom of the induced draft fan body is connected to a connecting seat, and an air inlet groove is provided inside the connecting seat.

[0012] Preferably, assembly plates with holes are fixedly mounted on both sides of the connecting seat.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model inserts one end of the external pipe into the induced air duct, so that the buckle on the surface of the external pipe is engaged with the groove inside the rotating clamping seat, so that the induced air duct and the external pipe are installed. The elastic resetter supports the rotating clamping seat, so that the engagement between the rotating clamping seat and the buckle is stable. When the external pipe is removed, the external pipe is first pushed in the direction of the induced air duct to realize the fixing frame squeezing the elastic part, so that the buckle is separated from the groove in the rotating clamping seat, and the double-threaded rod is driven to rotate by turning the hand wheel, thereby driving the two pressing plates to slide in the frame and approach each other, so that the pressing plate squeezes one end of the rotating clamping seat, so that the rotating clamping seat is rotated and the elastic resetter is squeezed, and the slot inside the rotating clamping seat is separated from the buckle surface. The external pipe is removed, which is convenient for the installation and disassembly of the induced air fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a three-dimensional diagram of the elastic member of the utility model;

[0017] Figure 3 It is a three-dimensional diagram of the local structure of the utility model;

[0018] Figure 4 It is a three-dimensional diagram of the pressing mechanism of the utility model.

[0019] In the figure: 1. induced draft fan body; 2. induced draft duct; 3. external duct; 4. buckle; 5. fixing mechanism; 51. mounting plate; 52. rotating clamp; 53. elastic resetter; 54. pressing mechanism; 541. frame; 542. double threaded rod; 543. pressing plate; 544. hand wheel; 6. pulley; 7. slide groove; 8. elastic member; 81. fixed frame; 82. movable frame; 83. groove; 84. spring device; 9. air inlet groove; 10. assembly plate; 11. connecting seat. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 The utility model provides a technical solution: an induced draft fan for a power plant boiler with an installation structure, comprising an induced draft fan body 1, an induced draft duct 2 is integrally processed on one side of the induced draft fan body 1, an external pipe 3 is slidably installed on one side of the induced draft duct 2, buckles 4 are installed on the front and back of the external pipe 3, and a fixing mechanism 5 adapted to the buckle 4 is installed on the surface of the induced draft duct 2;

[0022] The fixing mechanism 5 includes a mounting plate 51, a rotating base 52, an elastic resetter 53 and a pressing mechanism 54. The rotating base 52 is provided on both sides of the air duct 2. The groove 83 inside the rotating base 52 is engaged with the surface of the buckle 4. The top and bottom of the rotating base 52 are rotatably mounted with mounting plates 51. The surface of the mounting plate 51 is fixedly mounted on the surface of the air duct 2. Elastic resetters 53 for restoring the rotating base 52 are installed on both sides of the air duct 2. The top of the air duct 2 is provided with a pressing mechanism 54 for rotating the two rotating bases 52 at the same time.

[0023] The pressing mechanism 54 includes a frame 541, a double-threaded rod 542, a pressing plate 543 and a hand wheel 544. The frame 541 is fixedly installed on the top of the air duct 2, and the double-threaded rod 542 is rotatably installed inside the frame 541. The pressing plates 543 are threadedly installed on both sides of the surface of the double-threaded rod 542. The bottoms of the two pressing plates 543 penetrate the bottom of the frame 541 and fit the surface of the rotating holder 52. The hand wheel 544 is installed on one side of the double-threaded rod 542 that penetrates the frame 541.

[0024] When the external pipe 3 is removed, the external pipe 3 is first pushed toward the air duct 2 to squeeze the elastic member 8 by the fixed frame 81, and the buckle 4 is separated from the groove 83 in the rotating clamping seat 52. The double-threaded rod 542 is rotated by rotating the hand wheel 544, thereby driving the two pressing plates 543 to slide in the frame 541 and approach each other, so that the pressing plate 543 squeezes one end of the rotating clamping seat 52, and the rotating clamping seat 52 is rotated and squeezes the elastic resetter 53. The groove in the rotating clamping seat 52 is separated from the surface of the buckle 4, and the external pipe 3 is removed.

[0025] Two pulleys 6 are installed on both sides of the two pressing plates 543, and the inner wall of the frame 541 is provided with a slide groove 7 adapted to the pulleys 6;

[0026] Specifically, the movement of the pressing plate 543 can drive the pulley 6 to slide in the sliding groove 7, thereby enhancing the sliding stability of the pressing plate 543.

[0027] It also includes an elastic member 8, which includes a fixed frame 81, a movable frame 82, a groove 83 and a spring device 84. The fixed frame 81 is fixedly installed inside the air duct 2, and the movable frame 82 is slidably installed at one end of the external duct 3. Four spring devices 84 are clamped on one side of the external duct 3 through four grooves 83, and one end of the four spring devices 84 is clamped on the surface of the movable frame 82.

[0028] It should be noted that when the surface of the fixed frame 81 is in contact with the surface of the movable frame 82, the spring device 84 in the groove 83 is compressed, so that the sealing between the induced draft fan body 1 and the external pipe 3 is better. At the same time, under the action of the spring device 84, the buckle 4 will always resist the groove 83 in the rotating socket 52, and the connection is more stable. At the same time, when the induced draft pipe 2 and the external pipe 3 are separated, the external pipe 3 can be ejected.

[0029] In order to facilitate the support and air intake of the induced draft fan body 1 , a connecting seat 11 is connected to the bottom of the induced draft fan body 1 , and an air intake groove 9 is opened inside the connecting seat 11 .

[0030] In order to facilitate the fixed installation and use of the connecting base 11 , assembly plates 10 with holes are fixedly installed on both sides of the connecting base 11 .

[0031] The device inserts one end of the external pipe 3 into the air duct 2, so that the buckle 4 on the surface of the external pipe 3 is engaged with the groove 83 inside the rotating clamping seat 52, so that the air duct 2 and the external pipe 3 are installed. The elastic resetter 53 supports the rotating clamping seat 52, so that the rotating clamping seat 52 and the buckle 4 are stably engaged. When removing the external pipe 3, the external pipe 3 is first pushed toward the air duct 2 to realize the fixing frame 81 to squeeze the elastic member 8, so that the buckle 4 is separated from the groove 83 in the rotating clamping seat 52, and the double-threaded rod 542 is driven to rotate by rotating the hand wheel 544, thereby driving the two pressing plates 543 to slide in the frame 541 and approach each other, so that the pressing plate 543 squeezes one end of the rotating clamping seat 52, realizes the rotation of the rotating clamping seat 52 and squeezes the elastic resetter 53, and the slot inside the rotating clamping seat 52 is separated from the clamping and fixing relationship with the surface of the buckle 4, and the external pipe 3 is removed. Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An induced draft fan for a power plant boiler having an installation structure, comprising an induced draft fan body (1), characterized in that: An induced draft duct (2) is integrally formed on one side of the induced draft fan body (1); an external duct (3) is slidably mounted on one side of the induced draft duct (2); buckles (4) are mounted on the front and back sides of the external duct (3); and a fixing mechanism (5) matched with the buckle (4) is mounted on the surface of the induced draft duct (2); The fixing mechanism (5) comprises a mounting plate (51), a rotating clamping seat (52), an elastic resetter (53) and a pressing mechanism (54); rotating clamping seats (52) are arranged on both sides of the air duct (2); the groove (83) inside the rotating clamping seat (52) is clamped with the surface of the buckle (4); the top and bottom of the rotating clamping seat (52) are rotatably mounted with mounting plates (51); the surface of the mounting plate (51) is fixedly mounted on the surface of the air duct (2); elastic resetters (53) for restoring the rotating clamping seat (52) are arranged on both sides of the air duct (2); and a pressing mechanism (54) for simultaneously rotating the two rotating clamping seats (52) is arranged on the top of the air duct (2).

2. The induced draft fan for a power plant boiler with an installation structure according to claim 1, characterized in that: The pressing mechanism (54) comprises a frame (541), a double-threaded rod (542), a pressing plate (543) and a hand wheel (544); the frame (541) is fixedly mounted on the top of the air duct (2); the double-threaded rod (542) is rotatably mounted inside the frame (541); pressing plates (543) are threadedly mounted on both sides of the surface of the double-threaded rod (542); the bottoms of the two pressing plates (543) pass through the bottom of the frame (541) and fit with the surface of the rotating holder (52); and a hand wheel (544) is mounted on one side of the double-threaded rod (542) passing through the frame (541).

3. The induced draft fan for a power plant boiler with an installation structure according to claim 2, characterized in that: Two pulleys (6) are installed on both sides of the two pressing plates (543), and the inner wall of the frame (541) is provided with a sliding groove (7) adapted to the pulleys (6).

4. The induced draft fan for a power plant boiler with an installation structure according to claim 1, characterized in that: It also comprises an elastic member (8), the elastic member (8) comprising a fixed frame (81), a movable frame (82), a groove (83) and a spring device (84); the fixed frame (81) is fixedly installed inside the air duct (2); the movable frame (82) is slidably installed at one end of the external duct (3); four spring devices (84) are clamped on one side of the external duct (3) through four grooves (83), and one end of the four spring devices (84) is clamped on the surface of the movable frame (82).

5. The induced draft fan for a power plant boiler with an installation structure according to claim 1, characterized in that: The bottom of the induced draft fan body (1) is connected to a connecting seat (11), and an air inlet groove (9) is provided inside the connecting seat (11).

6. The induced draft fan for a power plant boiler with a mounting structure according to claim 5, characterized in that: Mounting plates (10) with holes are fixedly mounted on both sides of the connection seat (11).

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