CN211854061U - Power boiler flue seal structure - Google Patents

Abstract

The utility model discloses a power plant boiler flue sealing structure, which comprises a first sealing ring and a second sealing ring, wherein the top and the bottom of the first sealing ring and the top and the bottom of the second sealing ring are both fixedly provided with a fixed seat, the inside of the first sealing ring and the inside of the second sealing ring are both provided with an alarm structure, the inner wall of the first sealing ring and the inner wall of the second sealing ring are both fixedly provided with a plurality of spring rods, one ends of the spring rods are respectively and fixedly connected with the outer wall of the first inner ring and the outer wall of the second inner ring, the utility model can realize that when the flue welding part has continuous leakage, the air in the cavity is extruded from the opening part, the air circulation drives the vibration sheet to vibrate, the leakage is reminded by sending sound, when the flue welding part has a large amount of gas leakage, the first inner ring and the second inner ring are jacked up, the steel needle punctures the air bag, the red powder in the air bag is thrown out to give an early warning to operators.

Description

Power boiler flue seal structure

Technical Field

The utility model relates to a seal structure, in particular to power boiler flue seal structure belongs to the sealed technical field of boiler.

Background

The boiler tail flue refers to a flue arranged at the tail of the boiler and used for discharging smoke. The leakage of the boiler back flue usually comes from two parts: one part is that the flue is in a negative pressure state and leaks into the flue from the position where the outer wall of the flue is not tightly sealed; the other part is leaked through the air preheater tube or the baffle plate of the flue gas system. The air leakage of the tail flue of the boiler affects the running economy of the boiler and the running safety of downstream desulfurization equipment.

In view of the above, chinese patent No. CN204829966U proposes a sealing device for the joint between a boiler and a flue, which satisfies the expansion gap of axial, lateral and angular displacement by the matching installation of an inner sleeve, an outer sleeve and a compensating pipe; chinese patent No. CN202267072U proposes a flue sealing structure of a vertical gas turbine waste heat boiler, wherein a fixed partition plate is arranged on one side of a flue wallboard close to a heating surface module, and two ends of a glass fiber cotton connecting plate are respectively connected with the fixed partition plate and a flue gas baffle plate; chinese patent No. CN204372155U proposes a sealing structure of a flue at the furnace tail. However, the sealing structure in the patent has a common sealing effect on the welding position of the boiler flue, is lack of a leakage alarm device, cannot give out early warning to the outside due to leakage, reminds an operator to take action in time, and meanwhile, the operator needs to spend a large amount of time and energy on searching leakage points, so that the working strength of the operator is increased, and the working efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a power boiler flue seal structure to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a power boiler flue seal structure, includes first sealing ring and second sealing ring, the top and the bottom of first sealing ring and the top and the bottom of second sealing ring are all fixed and are equipped with the fixing base, four two screws have all been seted up at the middle part of fixing base, first sealing ring and second sealing ring are through a plurality of bolt swing joint, the inside of first sealing ring and the inside of second sealing ring all are provided with alarm structure.

Preferably, a plurality of spring rods are fixedly arranged on the inner wall of the first sealing ring and the inner wall of the second sealing ring, and one ends of the plurality of spring rods are fixedly connected with the outer wall of the first inner ring and the outer wall of the second inner ring respectively.

Preferably, the middle part of first inner circle bottom all is fixed and is equipped with the stopper, spacing hole has all been seted up at the middle part on second inner circle top, all be fixed on the inner wall of first inner circle and on the inner wall of second inner circle and be equipped with the rubber seal, two the inside of rubber seal all inlays and is equipped with the support ring.

Preferably, the alarm structure is including seting up at the inside cavity of two rubber sealing rings, two a plurality of openings have all been seted up at the both ends of rubber sealing ring, and are a plurality of the opening communicates each other with the cavity that corresponds respectively, and is a plurality of open-ended inside all is fixed and is equipped with a plurality of vibration thin slices.

Preferably, two air bags are fixedly arranged on the inner wall of the first sealing ring and the inner wall of the second sealing ring, and red powder is filled in the four air bags.

Preferably, two steel needles are fixedly arranged on the outer wall of the first inner ring and the outer wall of the second inner ring, and the positions of the four steel needles are matched with the positions of the four air bags.

Compared with the prior art, the beneficial effects of the utility model are that:

in the utility model, the spring rod, the first inner ring and the second inner ring are arranged to move towards the direction far away from the flue when the welding part of the flue expands due to the action of high-temperature gas, the spring rod is compressed, when the welding part of the flue contracts when meeting cold, the spring rod recovers deformation, the first inner ring and the second inner ring are pushed to move towards the direction close to the flue, so that the welding part of the flue is always kept in a sealing state, which is beneficial to providing a sealing effect, when the welding part of the flue continuously leaks, the cavity in the sealing rubber ring is repeatedly extruded, the air in the cavity is extruded from the opening, when the air passes through the opening, the air can drive the vibrating sheet to vibrate, the sound is sent out to remind an operator of leakage, the operator can take treatment measures in time, when a large amount of gas leaks from the welding part of the flue, with first inner circle and second inner circle by jack-up, the steel needle punctures the gasbag, and the red powder in the gasbag is spilled out, sends the early warning to operating personnel to can be for operating personnel provides the approximate position of leakage point, be favorable to operating personnel to discover the leakage point, practiced thrift operating personnel investigation leakage point's time.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic side view of the present invention;

fig. 3 is a schematic view of the internal structure of the middle seal rubber ring of the present invention;

FIG. 4 is a partial enlarged view of the middle opening of the present invention;

fig. 5 is an enlarged view of a portion a of fig. 2 according to the present invention.

In the figure: 1. a first seal ring; 2. a second seal ring; 3. a first inner race; 4. a second inner race; 5. a fixed seat; 6. an air bag; 7. a steel needle; 8. a spring lever; 9. a screw hole; 10. sealing the rubber ring; 11. a support ring; 12. a cavity; 13. an opening; 14. vibrating the sheet; 15. a limiting block; 16. and a limiting hole.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made 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" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows:

as shown in fig. 1-5, a power boiler flue seal structure, including first sealing ring 1 and second sealing ring 2, fixing base 5 has all been fixed to the top and the bottom of first sealing ring 1 and the top and the bottom of second sealing ring 2, two screw 9 have all been seted up at the middle part of four fixing base 5, first sealing ring 1 and second sealing ring 2 are through a plurality of bolt swing joint, it is sealed effectual through bolted connection, and easy to assemble and dismantlement, the inside of first sealing ring 1 and the inside of second sealing ring 2 all are provided with alarm structure.

Example two:

on the basis of the first embodiment, as shown in fig. 2, a plurality of spring rods 8 are fixedly arranged on the inner wall of the first sealing ring 1 and the inner wall of the second sealing ring 2, one ends of the spring rods 8 are fixedly connected with the outer wall of the first inner ring 3 and the outer wall of the second inner ring 4 respectively, the middle part of the bottom end of the first inner ring 3 is fixedly provided with a limiting block 15, the middle part of the top end of the second inner ring 4 is provided with a limiting hole 16, when the welding part of the flue expands due to the action of high-temperature gas, the first inner ring 3 and the second inner ring 4 move in the direction away from the flue, the spring rods 8 are compressed, when the welding part of the flue meets cold contraction, the spring rods 8 recover deformation to push the first inner ring 3 and the second inner ring 4 to move in the direction close to the flue, so that the welding part of the flue is always kept in a sealing state, and sealing rubber rings 10 are fixedly arranged on the inner wall of the first inner ring 3, sealing rubber ring 10 can strengthen frictional force, improves fixed effect to can strengthen sealed effect, two sealing rubber ring 10's inside all inlays and is equipped with support ring 11, and support ring 11 provides the rigidity for sealing rubber ring 10 and supports, and when flue welding department appeared leaking, sealing rubber ring 10 can provide preliminary shutoff.

Example three:

on the basis of the first embodiment and the second embodiment, as shown in fig. 2 and 4, the alarm structure includes cavities 12 formed in two sealing rubber rings 10, two ends of the two sealing rubber rings 10 are respectively provided with a plurality of openings 13, the plurality of openings 13 are respectively communicated with the corresponding cavities 12, a plurality of vibrating sheets 14 are fixedly arranged in the plurality of openings 13, when the continuous leakage occurs at the flue welding position, the leaked gas repeatedly extrudes the cavities 12 in the sealing rubber rings 10, the air in the cavities 12 is extruded from the openings 13, the air drives the vibrating sheets 14 to vibrate when passing through the openings 13, the vibrating sheets 14 make a sound to remind the operator of the leakage, which is beneficial for the operator to take treatment measures in time, two air bags 6 are fixedly arranged on the inner wall of the first sealing ring 1 and the inner wall of the second sealing ring 2, red powder is all equipped with to the inside of four gasbag 6, all fixed two steel needles 7 that are equipped with on the outer wall of first inner circle 3 and on the outer wall of second inner circle 4, the position phase-match of four steel needles 7 and four gasbag 6, when flue welding department takes place a large amount of gas leakage, the gas of leakage is with first inner circle 3 and 4 jack-ups of second inner circle, steel needle 7 punctures gasbag 6, red powder in the gasbag 6 is shed out, send the early warning to operating personnel, and can provide the approximate position of leakage point for operating personnel, be favorable to operating personnel to discover the leakage point, operating personnel investigation leakage point's time has been practiced thrift.

It should be noted that, the utility model relates to a power boiler flue sealing structure, at first install first sealing ring 1 and second sealing ring 2 at the welding position of flue through the bolt, when the welding position of flue expands because of the effect of high-temperature gas, first inner circle 3 and second inner circle 4 move to the direction far away from the flue, spring rod 8 is compressed, when the welding position of flue meets cold shrinkage, spring rod 8 restores deformation, promote first inner circle 3 and second inner circle 4 to move to the direction near the flue, make the welding position of flue keep the seal state all the time, when the flue welding position appears the trace leakage, can carry out preliminary shutoff to the leakage point through the cooperation of sealed rubber ring 10, first inner circle 3 and second inner circle 4, when the flue welding position appears the continuous leakage, receive the effect that the gas that leaks extrudes repeatedly, the cavity 12 inside sealed rubber ring 10 is extrudeed repeatedly, the air in the cavity 12 is squeezed out from the opening 13, the air can drive the vibrating sheet 14 to vibrate when passing through the opening 13, the vibrating sheet 14 makes a sound to remind an operator of leakage, when a large amount of gas leaks from the welding position of the flue, the leaked gas jacks the first inner ring 3 and the second inner ring 4, the steel needle 7 punctures the air bag 6, the red powder in the air bag 6 is thrown out to give an early warning to the operator, and the approximate position of a leakage point can be provided for the operator.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. The utility model provides a power boiler flue seal structure, includes first sealing ring (1) and second sealing ring (2), its characterized in that: the top and the bottom of first sealing ring (1) and the top and the bottom of second sealing ring (2) are all fixed and are equipped with fixing base (5), four two screw (9) have all been seted up at the middle part of fixing base (5), first sealing ring (1) and second sealing ring (2) are through a plurality of bolt swing joint, the inside of first sealing ring (1) and the inside of second sealing ring (2) all are provided with alarm structure.

2. The power plant boiler flue sealing structure of claim 1, characterized in that: a plurality of spring rods (8) are fixedly arranged on the inner wall of the first sealing ring (1) and the inner wall of the second sealing ring (2), and one ends of the spring rods (8) are fixedly connected with the outer wall of the first inner ring (3) and the outer wall of the second inner ring (4) respectively.

3. The power plant boiler flue sealing structure of claim 2, characterized in that: the middle part of first inner circle (3) bottom all is fixed and is equipped with stopper (15), spacing hole (16) have all been seted up at the middle part on second inner circle (4) top, all be fixed on the inner wall of first inner circle (3) and on the inner wall of second inner circle (4) and be equipped with rubber seal (10), two the inside of rubber seal (10) all inlays and is equipped with support ring (11).

4. The power plant boiler flue sealing structure of claim 1, characterized in that: alarm structure is including offering cavity (12) in two sealed rubber ring (10) insides, two a plurality of openings (13), a plurality of have all been seted up at the both ends of sealed rubber ring (10) opening (13) communicate each other with cavity (12) that correspond respectively, and is a plurality of the inside of opening (13) is all fixed and is equipped with a plurality of vibration thin slice (14).

5. The power plant boiler flue sealing structure of claim 1, characterized in that: the inner wall of the first sealing ring (1) and the inner wall of the second sealing ring (2) are fixedly provided with two air bags (6), and the interiors of the air bags (6) are all filled with red powder.

6. The power plant boiler flue sealing structure of claim 2, characterized in that: two steel needles (7) are fixedly arranged on the outer wall of the first inner ring (3) and the outer wall of the second inner ring (4), and the positions of the steel needles (7) are matched with the positions of the four air bags (6).

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