CN219283385U

CN219283385U - Self-closing device is prevented to boiler draught fan export air door

Info

Publication number: CN219283385U
Application number: CN202223277095.0U
Authority: CN
Inventors: 李翔
Original assignee: Yunnan Xiangdian Blower Co ltd
Current assignee: Yunnan Xiangdian Blower Co ltd
Priority date: 2023-05-10
Filing date: 2023-05-10
Publication date: 2023-06-30
Anticipated expiration: 2033-05-10

Abstract

The utility model discloses an automatic closing prevention device for an outlet air door of a boiler induced draft fan, which comprises a sleeve frame and a disassembly and assembly component, wherein the rear end of the interior of the sleeve frame is connected with a connecting frame in a sliding manner, the outer end of the front surface of the connecting frame is provided with a sealing gasket, the rear end of the connecting frame is welded with an air outlet pipe, the disassembly and assembly component for quick disassembly is arranged in the left end and the right end of the sleeve frame, the disassembly and assembly component comprises a pull ring, a clamping plate, a sliding rod, a baffle plate and a return spring, one side of the pull ring is fixedly connected with the clamping plate, the clamping plate is clamped with the connecting frame, the front end of one side of the clamping plate is connected with the sliding rod, the sliding rod is connected with the sleeve frame in a sliding manner, one end of the sliding rod is fixedly provided with the baffle plate, and one side of the baffle plate is connected with the return spring. This boiler draught fan export air door prevents self-closing device is through the setting of dismouting subassembly, is convenient for pull ring for cardboard and connecting frame separation, just can be quick dismantle the cover frame, thereby be convenient for maintain the maintenance to preventing self-closing device.

Description

Self-closing device is prevented to boiler draught fan export air door

Technical Field

The utility model relates to the technical field of boiler induced draft fans, in particular to an automatic closing prevention device for an outlet air door of a boiler induced draft fan.

Background

The boiler induced draft fan is a machine which increases the pressure of gas and discharges the gas by means of the mechanical energy input by a motor, and is a driven fluid machine. Boiler induced draft fans are widely used for ventilation and air induction in power production, factories, mines, tunnels, cooling towers, vehicles, ships, boilers and industrial furnaces. Because boiler in the operation in-process, draught fan export air door can reduce the opening degree gradually because of the vibration, then draught fan export wind pressure increases, and power consumption increases and causes extravagant, consequently need use and prevent self-closing device to fix a position the air door.

When the existing air door self-closing prevention device is used, the air door self-closing prevention device is inconvenient to detach, so that maintenance and overhaul are laborious.

Accordingly, the present utility model has been made in view of the above problems, and an object of the present utility model is to provide an automatic closing prevention device for an outlet damper of a boiler induced draft fan, which is more practical.

Disclosure of Invention

The utility model aims to provide an automatic closing prevention device for an outlet air door of a boiler induced draft fan, so as to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a boiler draught fan export air door anti-self-closing device, includes cover frame and dismouting subassembly, the inside rear end sliding connection of cover frame has the linking frame, and the front outer end of linking frame is provided with sealed the pad, the rear end welding of linking frame has out the tuber pipe for quick assembly disassembly's dismouting subassembly sets up inside the left and right sides both ends of cover frame, the dismouting subassembly includes pull ring, cardboard, slide bar, baffle and reset spring, one side fixedly connected with cardboard of pull ring, and cardboard and linking frame looks block, one side front end of cardboard is connected with the slide bar, and slide bar and cover frame sliding connection, the one end of slide bar is fixed with the baffle, and one side of baffle is connected with reset spring.

Further, the upper right end of cover frame is provided with the auto-lock subassembly that is used for reinforcing stability, auto-lock subassembly is including fixed section of thick bamboo, slide bar, handle and transfer line, the upper right end of connecting frame is settled there is fixed section of thick bamboo, and the inside sliding connection of right-hand member of fixed section of thick bamboo has the slide bar, the handle is settled to the right-hand member of slide bar, and the inside left end sliding connection of slide bar has the transfer line.

Further, the self-locking assembly further comprises a fixing ring, a tooth block and a positioning ring, wherein the fixing ring is fixed on the outer side of the left end of the sliding rod, the tooth block is arranged on the left side of the fixing ring, the positioning ring is arranged on the left side of the tooth block, and the positioning ring is fixedly connected with the fixing cylinder.

Further, the tooth blocks are distributed at equal intervals on the left side of the fixed ring in a circumferential mode, and the fixed ring is meshed with the positioning ring through the tooth blocks.

Further, the self-locking assembly further comprises balls, a baffle ring and a positioning spring, the balls are connected to the right side of the fixing ring in a sliding mode, the baffle ring is arranged outside the right side of the balls, and the positioning spring is connected to the right side of the baffle ring.

Further, the upper end of cover frame is inside to be provided with the adjusting part that is used for adjusting the air exit size, adjusting part includes positive and negative tooth lead screw, sliding sleeve, connecting plate, door plant and spacing groove, the sliding sleeve has been cup jointed to positive and negative tooth lead screw's middle part symmetry, and the bottom mounting of sliding sleeve has the connecting plate, the door plant has been settled to the bottom of connecting plate, the spacing groove has been seted up to the front end of cover frame inside, and the door plant passes through spacing groove and cover frame sliding connection.

Further, the section of the transmission rod is rectangular, and the transmission rod is fixedly connected with the positive and negative tooth screw rod.

The utility model provides an automatic closing prevention device for an outlet air door of a boiler induced draft fan, which has the following beneficial effects: this self-closing device is prevented to boiler draught fan export air door adopts the mutually supporting between a plurality of subassemblies, not only can be quick prevent self-closing device to the air door dismouting to improve the convenience when repairing the maintenance, and can also adjust the size of air outlet according to the demand, in order to increase the adaptation scope of device, and can also strengthen the stability after the regulation.

1. According to the utility model, the pull ring is conveniently pulled through the arrangement of the dismounting assembly, so that the clamping plate is separated from the connecting frame, the sleeve frame can be quickly dismounted, the self-closing prevention device is convenient to maintain and overhaul, the connecting frame can limit the upper, lower, left and right directions of the sleeve frame by sleeving the sleeve frame on the connecting frame during installation, the sealing gasket can strengthen the sealing performance between the connecting frame and the sleeve frame, and after the clamping plate is sleeved on the outer side of the connecting frame, the return spring can push the baffle plate to enable the sliding rod to position the clamping plate, so that the convenience and the stability during installation are improved;

2. according to the utility model, after the door plate is opened, the stop ring can be pushed by the positioning spring, so that the fixed ring is meshed with the positioning ring through the tooth blocks, the sliding rod in the fixed ring can not rotate, the stability of the opened air door is enhanced, and during adjustment, the handle is convenient to pull, so that the sliding rod drives the fixed ring to move right, and the sliding rod is separated from the positioning ring, thereby facilitating the rotation of the sliding rod, the position of the door plate is adjusted, the convenience in use is improved, and the friction loss between the fixed ring and the stop ring can be reduced through the arrangement of the balls, so that the rotation is more labor-saving;

3. according to the utility model, through the arrangement of the adjusting component, when the handle is rotated, the slide bar drives the positive and negative screw rod to rotate through the transmission rod, and the sliding sleeve can drive the door plate to move through the connecting plate, so that the door plate can move in the limiting groove, the position of the door plate can be adjusted, and the size of the air outlet can be adjusted according to requirements, so that the adaptation range of the device is enlarged.

Drawings

FIG. 1 is a schematic diagram of the whole cross-sectional elevation of a self-closing prevention device for an outlet air door of a boiler induced draft fan;

FIG. 2 is a schematic diagram of the overall top cross-sectional structure of the self-closing prevention device for the outlet damper of the induced draft fan of the boiler;

FIG. 3 is a schematic perspective view of a connecting frame of the self-closing prevention device for an outlet air door of a boiler induced draft fan;

fig. 4 is an enlarged schematic view of the structure of the self-closing prevention device for the outlet damper of the induced draft fan in fig. 1 at a position a.

In the figure: 1. a sleeve frame; 2. a connection frame; 3. a sealing gasket; 4. an air outlet pipe; 5. disassembling and assembling the assembly; 501. a pull ring; 502. a clamping plate; 503. a slide bar; 504. a baffle; 505. a return spring; 6. a self-locking assembly; 601. a fixed cylinder; 602. a slide bar; 603. a handle; 604. a transmission rod; 605. a fixing ring; 606. tooth blocks; 607. a positioning ring; 608. a ball; 609. a baffle ring; 610. a positioning spring; 7. an adjustment assembly; 701. a positive and negative tooth lead screw; 702. a sliding sleeve; 703. a connecting plate; 704. a door panel; 705. and a limit groove.

Detailed Description

Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.

As shown in fig. 1, fig. 2 and fig. 3, a boiler induced draft fan outlet air door anti-self-closing device comprises a sleeve frame 1 and a dismounting assembly 5, wherein the rear end of the interior of the sleeve frame 1 is slidably connected with a connecting frame 2, the front outer end of the connecting frame 2 is provided with a sealing gasket 3, the connecting frame 2 can limit the upper, lower, left and right directions of the sleeve frame 1, the sealing gasket 3 can strengthen the sealing performance between the connecting frame 2 and the sleeve frame 1, the rear end of the connecting frame 2 is welded with an air outlet pipe 4, the dismounting assembly 5 for quick dismounting is arranged in the left and right ends of the sleeve frame 1, the dismounting assembly 5 comprises a pull ring 501, a clamping plate 502, a sliding rod 503, a baffle 504 and a return spring 505, one side of the pull ring 501 is fixedly connected with the clamping plate 502, the clamping plate 502 is clamped with the connecting frame 2, the pull ring 501 is convenient to pull the clamping plate 502 is separated from the connecting frame 2, and the sleeve frame 1 can be quickly dismounted, thereby being convenient for maintenance and repair of the anti-self-closing device, the front end of one side of the clamping plate 502 is connected with the sliding rod 503, the sliding rod 503 is in sliding connection with the sleeve frame 1, one end of the sliding rod 503 is fixedly provided with the baffle 504, one side of the baffle 504 is connected with the return spring 505, the return spring 505 can push the baffle 504, the sliding rod 503 is used for positioning the clamping plate 502 so as to improve the convenience and stability during installation, the upper end of the sleeve frame 1 is internally provided with the adjusting component 7 used for adjusting the size of the air outlet, the adjusting component 7 comprises a positive and negative screw 701, a sliding sleeve 702, a connecting plate 703, a door plate 704 and a limiting groove 705, the sliding sleeve 702 is symmetrically sleeved at the middle part of the positive and negative screw 701, the connecting plate 703 is fixed at the bottom end of the sliding sleeve 702, the bottom end of the connecting plate 703 is provided with the door plate 704, the limiting groove 705 is arranged at the front end of the sleeve frame 1, and the door plate 704 is in sliding connection with the sleeve frame 1 through the limiting groove 705, when the front and back tooth screw 701 rotates, the sliding sleeve 702 can drive the door plate 704 to move through the connecting plate 703, so that the door plate 704 can move in the limiting groove 705, the position of the door plate 704 can be adjusted, and the size of the air outlet can be adjusted according to requirements, so that the adaptation range of the device is enlarged.

As shown in fig. 4, the upper right end of the sleeve frame 1 is provided with a self-locking component 6 for enhancing stability, the self-locking component 6 comprises a fixed cylinder 601, a slide bar 602, a handle 603 and a transmission rod 604, the upper right end of the connecting frame 2 is provided with the fixed cylinder 601, the right end of the fixed cylinder 601 is connected with the slide bar 602 in a sliding way, the right end of the slide bar 602 is provided with the handle 603, the left end of the inside of the slide bar 602 is connected with the transmission rod 604 in a sliding way, the section of the transmission rod 604 is rectangular, the transmission rod 604 is fixedly connected with the positive and negative lead screw 701, the slide bar 602 can drive the positive and negative lead screw 701 to rotate so as to adjust the opening size of the air door, the self-locking component 6 further comprises a fixed ring 605, a tooth block 606 and a positioning ring 607, the outer side of the left end of the slide bar 602 is fixedly provided with the fixed ring 605, and the left side of the fixed ring 605 is provided with the tooth block 606, the left side of tooth piece 606 is provided with holding ring 607, and holding ring 607 and fixed cylinder 601 fixed connection, the tooth piece 606 is circumference equidistance about the left side of holding ring 605 and distributes, and holding ring 605 meshes with holding ring 607 through tooth piece 606, can make the slide bar 602 in the holding ring 605 unable rotation, with the stability after reinforcing door plant 704 opens, self-locking assembly 6 still includes ball 608, baffle ring 609 and positioning spring 610, the right side of holding ring 605 is sideslip is connected with ball 608, and the right side outside of ball 608 is provided with baffle ring 609, through the setting of ball 608, can reduce the friction loss between holding ring 605 and the baffle ring 609, more laborsaving when making to rotate, the right side of baffle ring 609 is connected with positioning spring 610, positioning spring 610 can promote the baffle ring 609, thereby can be quick lock the direction of rotation of holding ring 605.

In summary, when the self-closing prevention device for the outlet air door of the boiler induced draft fan is used, firstly, according to the structure shown in fig. 1 and 4, when the self-closing prevention device is used, the handle 603 is conveniently pulled, the slide bar 602 drives the fixed ring 605 to move rightwards to be separated from the positioning ring 607, so that the slide bar 602 is conveniently rotated, the convenience in use is improved, friction loss between the fixed ring 605 and the baffle ring 609 can be reduced through the arrangement of the balls 608, the rotation is more labor-saving, then, when the handle 603 is rotated, the slide bar 602 drives the positive and negative screw 701 to rotate through the transmission rod 604, the sliding sleeve 702 can drive the door plate 704 to move through the connection plate 703, so that the position of the door plate 704 can be adjusted in the limiting groove 705, the size of the air outlet can be adjusted according to requirements, the adaptation range of the self-closing prevention device is enlarged, then, after the hand is loosened, the positioning spring 610 can push the baffle ring 609, so that the fixing ring 605 is meshed with the positioning ring 607 through the tooth block 606, so that the sliding rod 602 in the fixing ring 605 can not rotate, so as to enhance the stability of the door plate 704 after being opened, finally according to the structure shown in fig. 2 and 3, the pull ring 501 is conveniently pulled, the clamping plate 502 is separated from the connecting frame 2, the sleeve frame 1 can be quickly disassembled, so that the self-closing prevention device is conveniently maintained and overhauled, and when the self-closing prevention device is installed, the connecting frame 2 can limit the vertical and horizontal directions of the sleeve frame 1 by sleeving the sleeve frame 1 on the connecting frame 2, the sealing performance between the connecting frame 2 and the sleeve frame 1 can be enhanced by the sealing gasket 3, and after the clamping plate 502 is sleeved on the outer side of the connecting frame 2, the baffle plate 504 is pushed by the reset spring 505, so that the clamping plate 502 is positioned by the sliding rod 503, so as to improve the convenience and stability during installation.

The embodiments of the utility model have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides a boiler draught fan export air door anti-self-closing device, includes cover frame (1) and dismouting subassembly (5), its characterized in that, the inside rear end sliding connection of cover frame (1) has connecting frame (2), and the front outer end of connecting frame (2) is provided with sealed pad (3), the rear end welding of connecting frame (2) has tuber pipe (4), is used for quick assembly disassembly dismouting subassembly (5) set up in the left and right sides of cover frame (1) inside, dismouting subassembly (5) include pull ring (501), cardboard (502), slide bar (503), baffle (504) and reset spring (505), one side fixedly connected with cardboard (502) of pull ring (501), and cardboard (502) and connecting frame (2) looks block, one side front end of cardboard (502) is connected with slide bar (503), and slide bar (503) and cover frame (1) sliding connection, one end of slide bar (503) is fixed with baffle (504), and one side of baffle (504) is connected with reset spring (505).

2. The boiler induced draft fan outlet air door self-closing prevention device according to claim 1, wherein the right upper end of the sleeve frame (1) is provided with a self-locking assembly (6) for enhancing stability, the self-locking assembly (6) comprises a fixed cylinder (601), a sliding rod (602), a handle (603) and a transmission rod (604), the right upper end of the connecting frame (2) is provided with the fixed cylinder (601), the right end of the fixed cylinder (601) is internally connected with the sliding rod (602) in a sliding manner, the right end of the sliding rod (602) is provided with the handle (603), and the inner left end of the sliding rod (602) is connected with the transmission rod (604) in a sliding manner.

3. The device for preventing the self-closing of the outlet air door of the induced draft fan of the boiler according to claim 2, wherein the self-locking assembly (6) further comprises a fixing ring (605), a tooth block (606) and a positioning ring (607), the outer side of the left end of the sliding rod (602) is fixedly provided with the fixing ring (605), the tooth block (606) is arranged on the left side of the fixing ring (605), the positioning ring (607) is arranged on the left side of the tooth block (606), and the positioning ring (607) is fixedly connected with the fixing cylinder (601).

4. A boiler induced draft fan outlet damper self-closing prevention device according to claim 3, wherein the tooth blocks (606) are circumferentially equidistant about the left side of the fixing ring (605), and the fixing ring (605) is meshed with the positioning ring (607) through the tooth blocks (606).

5. A boiler induced draft fan outlet damper anti-self-closing device according to claim 3, wherein the self-locking assembly (6) further comprises a ball (608), a baffle ring (609) and a positioning spring (610), the ball (608) is connected to the right side of the fixed ring (605) in a sliding manner, the baffle ring (609) is arranged on the outer portion of the right side of the ball (608), and the positioning spring (610) is connected to the right side of the baffle ring (609).

6. The boiler induced draft fan outlet air door anti-self-closing device according to claim 2, characterized in that an adjusting component (7) used for adjusting the size of an air outlet is arranged inside the upper end of the sleeve frame (1), the adjusting component (7) comprises a positive and negative screw rod (701), a sliding sleeve (702), a connecting plate (703), a door plate (704) and a limiting groove (705), the sliding sleeve (702) is symmetrically sleeved in the middle of the positive and negative screw rod (701), the connecting plate (703) is fixed at the bottom end of the sliding sleeve (702), the door plate (704) is arranged at the bottom end of the connecting plate (703), the limiting groove (705) is formed in the front end of the sleeve frame (1), and the door plate (704) is in sliding connection with the sleeve frame (1) through the limiting groove (705).

7. The device for preventing the self-closing of an outlet air door of a boiler induced draft fan according to claim 6, wherein the section of the transmission rod (604) is rectangular, and the transmission rod (604) is fixedly connected with the positive and negative screw rod (701).