CN215863322U

CN215863322U - Connecting device for furnace tube and kiln head boiler

Info

Publication number: CN215863322U
Application number: CN202122336268.0U
Authority: CN
Inventors: 温晓旭
Original assignee: Xiahe Qilianshan Andoo Cement Co ltd
Current assignee: Xiahe Qilianshan Andoo Cement Co ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-02-18
Anticipated expiration: 2031-09-26

Abstract

The utility model discloses a connecting device for a furnace tube, which comprises a superheater inlet header, a first flange plate, a second flange plate and a superheater tube bundle, wherein an annular boss is arranged on a binding surface of the first flange plate, a mounting hole is also arranged on the binding surface, the mounting hole is positioned on the outer side of the annular boss, a gas outlet of the superheater inlet header is positioned on the inner side of the annular boss, an annular groove corresponding to the annular boss is formed in the second flange plate, a sealing ring is arranged in the annular groove, a threaded hole corresponding to the mounting hole is also formed in the second flange plate, a through hole is formed in the second flange plate, the through hole is positioned on the inner side of the annular groove, and a gas inlet of the superheater tube bundle is positioned in the through hole. The annular boss on the first flange plate is matched with the annular groove on the second flange plate, so that the sealing performance of the superheater inlet header and the superheater tube bundle when the superheater inlet header and the superheater tube bundle are connected through the first flange plate and the second flange plate is ensured, and high-temperature gas leakage is prevented.

Description

Connecting device for furnace tube and kiln head boiler

Technical Field

The utility model relates to the field of kiln-head boilers, in particular to a connecting device for furnace tubes and a kiln-head boiler.

Background

The boiler flange is convenient for connecting the pipeline with the boiler, and the flange is a part for connecting the pipes and is used for connecting the pipe ends; there are also flanges on the inlet and outlet of the equipment for the connection between two pieces of equipment, such as reducer flanges. The boiler is an energy conversion device, the energy input to the boiler comprises chemical energy and electric energy in fuel, the boiler outputs steam, high-temperature water or an organic heat carrier with certain heat energy, the hot water or the steam generated in the boiler can directly provide heat energy for industrial production and people life, and can also be converted into mechanical energy through a steam power device or be converted into electric energy through a generator.

The air temperature of the boiler inlet of the existing kiln-head boiler is very high, and the superheater tube bundle is easy to deform under the long-time work, so that potential safety hazards such as explosion, tube explosion and the like exist in the operation of the boiler; secondly, the problem of high-temperature gas leakage is easy to occur due to poor installation strength and weak sealing effect at the joint of the boiler pipeline.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a connecting device for furnace tubes and a kiln head boiler.

The purpose of the utility model is realized by the following technical scheme: a connecting device for boiler tube, including over heater import collection case, first ring flange, second ring flange and over heater tube bank, be provided with annular boss on the binding face of first ring flange, and still be provided with the mounting hole on the binding face, the mounting hole is located the outside of annular boss, the gas outlet of over heater import collection case is located the inboard of annular boss, set up the annular groove that corresponds with annular boss on the second ring flange, be used for the erection seal circle in the annular groove, the screw hole that corresponds with the mounting hole has also been seted up on the second ring flange, the through-hole has been seted up on the second ring flange, the through-hole is located the annular groove inboard, the income gas port of over heater tube bank is located the through-hole, and first ring flange and second ring flange pass through the bolt and closely cooperate.

Preferably, the mounting holes are circumferentially distributed on the abutting surface.

Preferably, the outer side of the superheater tube bundle is provided with a reinforcing frame, and the reinforcing frame is positioned on the surface of the second flange plate.

Preferably, the cross section of the annular groove is trapezoidal, the width of the notch of the annular groove is smaller than the width of the groove bottom of the annular groove, and the thickness of the annular boss is matched with the width of the notch.

Preferably, the outer surface of the superheater tube bundle is wrapped with a heat insulation layer.

Preferably, the superheater tube bundle is made of high-temperature resistant material.

Preferably, the superheater tube bundle is 12Cr1MoGVG alloy steel boiler tubes.

The utility model provides a kiln hood boiler, includes the connecting device for boiler tube of above-mentioned arbitrary one, still includes outlet tube bank, and the income gas port of over heater tube bank is connected with the gas outlet of over heater import header, and the tube bank fixed bolster is installed to the middle section of over heater tube bank, and the gas outlet and the outlet tube bank intercommunication of over heater tube bank.

Preferably, the inlet of the superheater tube bundle is located at the top of the superheater inlet header.

The utility model has the following advantages: according to the utility model, the annular boss on the first flange plate is matched with the annular groove on the second flange plate, so that the sealing performance of the superheater inlet header and the superheater tube bundle when connected through the first flange plate and the second flange plate is ensured, and high-temperature gas leakage is prevented.

Drawings

FIG. 1 is a schematic diagram of the arrangement of superheater inlet header, superheater tube bundle and outlet tube bundle mounting locations;

FIG. 2 is a schematic view of the mounting structure of the first flange and the second flange;

FIG. 3 is a schematic structural view of the first flange;

FIG. 4 is a schematic structural view of a second flange;

FIG. 5 is a schematic view of a heater tube bundle;

in the figure, 1-superheater inlet header, 2-superheater tube bundle, 3-tube bundle fixing support, 4-outlet tube bundle, 6-first flange, 7-second flange, 9-reinforcing frame, 10-bolt, 11-annular boss, 12-mounting hole, 13-through hole, 14-annular groove, 15-threaded hole and 16-heat insulation layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element that is referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In this embodiment, as shown in fig. 2, fig. 3 and fig. 4, the connecting device for the furnace tube includes a superheater inlet header 1, a first flange 6, a second flange 7 and a superheater tube bundle 2, an annular boss 11 is provided on an attachment surface of the first flange 6, and a mounting hole 12 is further provided on the attachment surface, the mounting hole 12 is located outside the annular boss 11, and preferably, the mounting hole 12 is circumferentially distributed on the attachment surface. The gas outlet of the superheater inlet header 1 is located on the inner side of the annular boss 11, the second flange 7 is provided with an annular groove 14 corresponding to the annular boss 11, the annular groove 14 is internally used for installing a sealing ring, the second flange 7 is also provided with a threaded hole 15 corresponding to the installation hole 12, the second flange 7 is provided with a through hole 13, the through hole 13 is located on the inner side of the annular groove 14, the gas inlet of the superheater tube bundle 2 is located in the through hole 13, and the first flange 6 and the second flange 7 are closely matched through a bolt 10. Through the annular boss 11 on the first ring flange 6 and the annular groove 14 on the second ring flange 7 cooperate with each other to guarantee the leakproofness when superheater import collection box 1 and superheater tube bank 2 are connected through first ring flange 6 and second ring flange 7, prevent that high temperature gas from leaking. Specifically, the worker attaches the first flange 6 to the second flange 7, inserts the annular boss 11 into the annular groove 14, thereby extrudes the seal ring in the annular groove 14, ensures the sealing performance, prevents gas leakage, and fixes the first flange 6 and the second flange 7 by rotating the screw of the bolt 10 into the threaded hole 15 and the mounting hole 12.

Further, a reinforcing frame 9 is arranged on the outer side of the superheater tube bundle 2, and the reinforcing frame 9 is positioned on the surface of the second flange 7. In particular, the reinforcing frame 9 on the outside of the superheater tube bundle 2 makes the mounting between the superheater tube bundle 2 and the second flange 7 stronger.

In the present embodiment, the cross section of the annular groove 14 is trapezoidal, the width of the notch of the annular groove 14 is smaller than the width of the groove bottom of the annular groove 14, and the thickness of the annular boss 11 matches with the width of the notch. Specifically, the width of the groove opening of the annular groove 14 is smaller than the width of the groove bottom of the annular groove 14, so that the seal ring is prevented from falling out of the annular groove 14.

In this embodiment, as shown in FIG. 5, the outer surface of the superheater tube bundle 2 is wrapped with a layer of insulation 16. The purpose of the insulation layer 16 is to prevent workers from accidentally touching the surface of the superheater tube bundle 2 and causing burns, and preferably, the insulation layer 16 is an asbestos layer.

In the present embodiment, the superheater tube bundle 2 is made of a material resistant to high temperatures. Preferably, the superheater tube bundle 2 is 12Cr1MoGVG alloy steel boiler tubes. In particular, the 12Cr1MoGVG alloy boiler tubes also have high abrasion resistance, and therefore, the superheater tube bundle 2 also reduces the wind and sand abrasion caused by clinker particles.

As shown in figure 1, the kiln head boiler comprises any one of the connecting device for the boiler tube, and further comprises an outlet tube bundle 4, wherein an air inlet of the superheater tube bundle 2 is connected with an air outlet of a superheater inlet header 1, a tube bundle fixing support 3 is installed in the middle section of the superheater tube bundle 2, and the air outlet of the superheater tube bundle 2 is communicated with the outlet tube bundle 4. Specifically, the tube bundle fixing support 3 mainly functions to limit the superheater tube bundle 2, and gas in the superheater inlet header 1 is discharged through a gas outlet pipe of the gas outlet pipe, enters the superheater tube bundle 2, and is finally introduced into the superheater tube bundle 4. Further, the air inlet of the superheater tube bundle 2 is positioned at the top of the superheater inlet header 1. In this embodiment, superheater inlet header 1 and outlet tube bank 4 are prior art, and can be obtained through the market purchase according to actual need.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.

Claims

1. A connecting device for boiler tube, its characterized in that: comprises a superheater inlet header (1), a first flange plate (6), a second flange plate (7) and a superheater tube bundle (2), wherein an annular boss (11) is arranged on a binding surface of the first flange plate (6), a mounting hole (12) is also arranged on the binding surface, the mounting hole (12) is positioned on the outer side of the annular boss (11), a gas outlet of the superheater inlet header (1) is positioned on the inner side of the annular boss (11), an annular groove (14) corresponding to the annular boss (11) is formed in the second flange plate (7), a sealing ring is arranged in the annular groove (14), a threaded hole (15) corresponding to the mounting hole (12) is also formed in the second flange plate (7), a through hole (13) is formed in the second flange plate (7), and the through hole (13) is positioned on the inner side of the annular groove (14), the gas inlet of the superheater tube bundle (2) is positioned in the through hole (13), and the first flange plate (6) and the second flange plate (7) are tightly matched through a bolt (10).

2. The connection device for furnace tubes according to claim 1, characterized in that: the mounting holes (12) are circumferentially distributed on the binding surface.

3. The connection device for furnace tubes according to claim 2, characterized in that: and a reinforcing frame (9) is arranged on the outer side of the superheater tube bundle (2), and the reinforcing frame (9) is positioned on the surface of the second flange plate (7).

4. The connection device for furnace tubes according to claim 3, characterized in that: the cross-section of annular groove (14) is trapezoidal, just the notch width of annular groove (14) is less than the tank bottom width of annular groove (14), the thickness and the notch width phase-match of annular boss (11).

5. The connection device for furnace tubes according to claim 4, characterized in that: the outer surface of the superheater tube bundle (2) is wrapped with a heat insulation layer (16).

6. The connection device for furnace tubes according to claim 5, characterized in that: the superheater tube bundle (2) is made of high-temperature-resistant materials.

7. The connection device for furnace tubes according to claim 6, characterized in that: the superheater tube bundle (2) is a 12Cr1MoGVG alloy steel boiler tube.

8. A kiln head boiler is characterized in that: the connecting device for the furnace tube comprises any one of the claims 1 to 7, and further comprises an outlet tube bundle (4), wherein an air inlet of the superheater tube bundle (2) is connected with an air outlet of the superheater inlet header (1), a tube bundle fixing support (3) is installed in the middle section of the superheater tube bundle (2), and the air outlet of the superheater tube bundle (2) is communicated with the outlet tube bundle (4).

9. A kiln head boiler according to claim 8, characterized in that: and the air inlet of the superheater tube bundle (2) is positioned at the top of the superheater inlet header (1).