CN211041012U

CN211041012U - Anti-jamming baffle valve for heating furnace flue

Info

Publication number: CN211041012U
Application number: CN201921940391.XU
Authority: CN
Inventors: 程向锋; 张炳罡; 杨芳; 武立国
Original assignee: Luoyang Chaolan Energy Saving Technology Co ltd
Current assignee: Luoyang Chaolan Energy Saving Technology Co ltd
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-07-17
Anticipated expiration: 2029-11-12

Abstract

An anti-jamming baffle valve for a heating furnace flue comprises a valve baffle plate arranged in a shell, wherein the valve baffle plate is provided with at least two flow openings, each flow opening is provided with a baffle blade for opening and closing the flow opening, and the baffle blades are connected with a four-bar mechanism; each four-bar linkage is connected with a respective driving mechanism; at least one baffle blade is arranged on one side of the flue gas outlet of the flow opening. The utility model discloses every baffle blade all has independent actuating mechanism and actuating mechanism, does not influence each other between the baffle blade, not only can guarantee that each baffle blade can both reliably close, can realize moreover that zero leaks sealedly. The utility model discloses a baffle blade part or whole be located the one side of contactless flue gas when the flue gas is cut off, avoided the actuating mechanism of baffle blade because of being in hot flue gas environment for a long time in appear jamming, deformation or corruption scheduling problem, improved actuating mechanism's reliability and life.

Description

Anti-jamming baffle valve for heating furnace flue

Technical Field

The utility model relates to a heating furnace technical field especially relates to an anti-sticking puckery flapper valve for heating furnace flue.

Background

The heating furnace is widely applied to the industries of petroleum, chemical industry, electric power, metallurgy and the like, and the baffle in the flue of the heating furnace plays a role in regulating flow and cutting off circulation in a chimney or the flue. The oxygen content, the negative pressure and the flow of the flue gas in the hearth can be controlled by changing the opening degree of the baffle, so that the stop accident caused by flameout of the heating furnace is avoided. And along with waste heat recovery tends to the normality, hot flue gas can only be discharged to the atmosphere through heat exchange, at this moment, the flue baffle needs to be closed completely, and the hot flue gas in the heating furnace is pumped into the heat exchanger by the draught fan for heat replacement, so that the purpose of energy recycling is achieved. If the flue baffle plate leaks, cold air or replaced low-temperature flue gas can be pumped back to the heat exchanger, so that the heat exchange efficiency is reduced and energy is wasted.

The existing flue baffle generally adopts a zero-leakage butterfly valve, but has the defects of high manufacturing cost, overweight weight and suitability for small caliber (less than or equal to 800 mm), and cannot meet the requirement of large-scale heating flue baffles. The shutter type flue baffle can meet the requirement of large-scale flue baffles, the existing shutter type flue baffle is provided with a plurality of baffle blades, and the plurality of baffle blades share one driving mechanism. Because the actuating mechanism of each baffle blade is connected with the same driving mechanism through the transmission rod, the shutter type flue baffle has the defects of long transmission route and poor reliability. On the one hand, because there is the cooperation error between each connecting rod of actuating mechanism, the accumulation of error can cause the jam of connecting rod motion, in case one of them connecting rod appears the jam, will cause whole flue baffle all can't the operation. On the other hand, because the actuating mechanisms of the baffle blades have different sizes and different closing angles, all the baffle blades can be closed reliably, and zero-leakage sealing cannot be realized.

In addition, the baffle blade all designs in the intermediate position of flue baffle at present, and the axis of rotation of baffle blade appears corroding, hesitating easily for a long time in high temperature flue gas environment, influences the reliability and the life of mechanism.

The method has important practical significance for solving the related technical problems and providing an effective solution.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough in the background art, the utility model discloses an anti-sticking puckery flapper valve for heating furnace flue, its aim at:

1. the reliable closing of the baffle plate blade is ensured;

2. each baffle blade can realize zero leakage sealing;

3. avoid the corrosion and the stagnation of the driving shaft and the actuating mechanism, improve the reliability of the actuating mechanism and prolong the service life.

An anti-jamming baffle valve for a heating furnace flue comprises a valve baffle plate arranged in a shell, wherein the valve baffle plate is provided with at least two flow openings, a baffle blade for opening and closing the flow openings is arranged on each flow opening, and the baffle blade is connected with a four-bar mechanism; each four-bar linkage is connected with a respective driving mechanism; at least one baffle blade is arranged on one side of the flue gas outlet of the flow opening.

For improving technical scheme, the casing is the cylinder casing, the valve baffle is circular baffle, is equipped with two circulation mouths at least on circular baffle, circulation mouth evenly distributed along circular baffle's circumference.

In order to improve the technical scheme, the shell is a square barrel-shaped shell, the valve partition plate is a rectangular partition plate, at least two circulation ports are arranged on the rectangular partition plate, and the circulation ports are uniformly distributed on the rectangular partition plate.

In order to improve the technical scheme, the number of the baffle blades is even, when the shell is vertically arranged, half of the baffle blades are arranged on one side of the flue gas inlet of the circulation port, and the other half of the baffle blades are arranged on one side of the flue gas outlet of the circulation port; when the shell is horizontally arranged, the baffle blades are arranged on one side of the smoke outlet of the circulation port and are symmetrically arranged.

In order to improve the technical scheme, the four-bar mechanism comprises a swing rod connected with the baffle blade, and the swing rod is respectively hinged with the free ends of the driving rod and the driven rod; the fixed end of the driving rod is connected with a driving shaft, and the driving shaft is connected with a driving mechanism; the fixed end of the driven rod is hinged to the fixed rod, and the fixed rod is fixed to the inner wall of the shell.

In order to improve the technical scheme, one end of the swing rod, which is connected with the baffle plate blade, is a flat plate, a main support which is hinged with the free end of the driving rod is arranged in the middle of the flat plate, and a pair of side supports are arranged on two sides of the main support; the two driven rods are provided, and the pair of side supporting seats are respectively hinged with the free ends of the two driven rods; and a pair of fixed rods is arranged on the inner wall of the shell and is respectively hinged with the fixed ends of the two driven rods.

In order to improve the technical scheme, the dead lever includes the sleeve pipe, the sleeve pipe suit is in the outside of driving shaft, and sheathed tube one end is fixed on the inner wall of casing, and the other end is equipped with and is used for articulating the articulated seat with the driven lever stiff end.

In order to improve technical scheme, be provided with on the dead lever and be used for the spacing stopper of baffle blade rotation angle, when the baffle blade is opened completely, the baffle blade contacts spacingly with the stopper, and the spacing face of stopper and baffle blade contact is the arc surface.

In order to improve the technical scheme, a limiting block for limiting the rotation angle of the baffle blade is arranged in the shell and is fixed on the inner wall of the shell; when the baffle blade is completely opened, the baffle blade is in contact with the limiting block for limiting, and the limiting surface of the limiting block in contact with the baffle blade is an arc surface.

In order to improve the technical scheme, a soft sealing material is arranged on a sealing surface of the flow opening, and when the baffle blade is completely closed, the baffle blade seals the flow opening through the soft sealing material.

Owing to adopt above-mentioned technical scheme, compare the background art, the utility model discloses following beneficial effect has:

1. due to the fact that the baffle blades are arranged in a split mode, heavy single large blades are avoided, manufacturing cost is reduced, and economical efficiency is good. Because the space that the burst baffle blade occupies is little, consequently need not reserve too big space in the casing.

2. Each baffle blade is provided with an independent actuating mechanism and an independent driving mechanism, the baffle blades are not mutually influenced, the flue can be quickly opened or closed, each baffle blade can be guaranteed to be reliably closed, and zero leakage sealing is realized.

3. The baffle plate blades are partially or completely positioned on one side which is not in contact with the flue gas when the flue gas is cut off, so that the problems of jamming, deformation or corrosion and the like of an actuating mechanism of the baffle plate blades due to long-term hot flue gas environment are avoided, and the reliability and the service life of the actuating mechanism are improved.

4. The stopper can guarantee that the baffle blade no longer continues the rotation after opening completely, avoids the baffle blade to cross and predetermines the termination point, causes flow area's reduction on the contrary, guarantees the flux of flue gas.

Drawings

Fig. 1-2 are schematic structural views of the present invention in example 1.

Fig. 3 to 4 are schematic structural views of the four-bar mechanism in embodiment 1.

Fig. 5 is a schematic structural diagram of the fixing rod.

Fig. 6 is another structure diagram of the fixing rod.

Fig. 7 is a schematic view illustrating the installation of the fixing lever of fig. 6.

Figures 8-9 are schematic views of sealing structures of the fixing rod of figure 6.

Fig. 10-12 are schematic views of the flapper vanes during opening.

Fig. 13 is a schematic structural diagram of a limiting block.

Fig. 14 is a schematic structural view of a stopper integrally connected with the fixing rod in fig. 5.

Fig. 15 is a schematic structural view of a limiting block integrally connected with the fixing rod in fig. 6.

Fig. 16 to 17 are schematic structural views of the present invention in example 2.

Fig. 18 to 19 are schematic structural views of the present invention in example 3.

In the figure: 1. a housing; 2. a baffle blade; 3. a valve partition; 3.1, a flow port; 4. A four-bar linkage; 4.1, a swing rod; 4.2, a driving rod; 4.3, a driven rod; 5. a drive shaft; 6. a drive mechanism; 7. fixing the rod; 7.1, a sleeve; 7.2, a hinged seat; 8. a limiting block; 9. a soft sealing material; 10. and (5) sealing and filling.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

Example 1:

an anti-jamming baffle valve for a flue of a heating furnace is shown in figures 1 and 2 and comprises a shell 1, in the embodiment, the flue of the heating furnace is cylindrical, so that the shell 1 is also cylindrical, a valve partition plate 3 is a circular partition plate, two circulation ports 3.1 are arranged on the circular partition plate, and the two circulation ports 3.1 are approximately semicircular and are uniformly distributed along the circumferential direction of the circular partition plate. Each of the flow ports 3.1 is provided with a baffle blade 2 for opening and closing the flow port 3.1, and the shape of the baffle blade 2 is approximately semicircular corresponding to the shape of the flow port 3.1. The sealing surface of the flow port 3.1 is provided with a soft sealing material 9, and when the flue is closed, the baffle blade 2 and the valve partition 3 seal the flow port 3.1 through the soft sealing material 9 so as to cut off the flow of the flue gas.

The barrier blade 2 is connected to a four-bar linkage 4. The four-bar linkage mechanism 4 is a movement executing mechanism of the baffle plate blade 2, the four-bar linkage mechanism 4 comprises a swing rod 4.1 connected with the baffle plate blade 2, and the swing rod 4.1 is hinged with the free ends of the driving rod 4.2 and the driven rod 4.3 respectively. The fixed end of the driven rod 4.3 is hinged with the fixed rod 7, and the fixed end of the driving rod 4.2 is connected with the driving shaft 5. The movement principle of the four-bar linkage 4 is disclosed in the patent application No. CN02284172.5, and will not be described herein. The four-bar mechanism 4 can realize that the baffle plate blade 2 firstly performs approximate translation when being opened, and then performs large-amplitude rotation after being separated from the soft sealing material 9 by a safe distance, so that the sealing surface is not easy to scratch, the sealing performance is good and reliable, and no abrasion phenomenon exists.

In order to access driving power, the fixed end of the driving rod 4.2 is connected with a driving shaft 5 through a key, and the driving shaft 5 is connected with a driving mechanism 6. It should be noted that the four-bar linkage 4 on each barrier vane 2 is connected to a respective drive mechanism 6 via a respective drive shaft 5. That is, each baffle blade 2 has a set of independent actuator and driving mechanism 6, and any one baffle blade 2 has a problem without affecting the working state of the other baffle blades 2. In addition, each baffle blade 2 is provided with an independent actuating mechanism and a driving mechanism 6, and the baffle blades 2 are not affected with each other, so that on one hand, the flue can be opened or closed quickly, and each baffle blade 2 can be closed reliably; on the other hand, even if the actuating mechanism of each baffle blade 2 has different sizes and different closing angles, the complete closing of each baffle blade 2 and the corresponding flow opening 3.1 is not influenced, and zero-leakage sealing is realized.

In order to enhance the overall strength of the four-bar linkage 4, as shown in fig. 3, 4 and 5, one end of the swing rod 4.1 connected with the baffle blade 2 is a flat plate, and the flat plate is screwed with the baffle blade 2 through a bolt. The middle part of the flat plate is provided with a main support hinged with the free end of the driving rod 4.2, and two sides of the main support are symmetrically provided with a pair of side supports. The flat connection increases the strength of the connection of the oscillating lever 4.1 to the flap blade 2 and also the strength of itself. The number of the driven rods 4.3 is two, and a pair of side supporting seats are respectively hinged with the free ends of the two driven rods 4.3. A pair of fixed rods 7 is arranged on the inner wall of the shell 1, one end of each fixed rod 7 is welded on the inner wall of the shell 1, and the other end of each fixed rod 7 is hinged with the fixed end of the driven rod 4.3. The main support and the pair of side support are separately arranged and are respectively hinged with the free ends of the driving rod 4.2 and the two driven rods 4.3, so that the structural strength of the four-bar linkage mechanism 4 is enhanced.

In order to make the structure of the four-bar linkage 4 more compact, as shown in fig. 6 and 7, the fixing rod 7 comprises a sleeve 7.1, the sleeve 7.1 is sleeved outside the driving shaft 5, one end of the sleeve 7.1 is fixed on the inner wall of the housing 1, and the other end is provided with a hinge seat 7.2 for being hinged with the fixed end of the driven rod 4.3. The drive shaft 5 rotates in the sleeve 7.1, so that the space occupied by the fixing rod 7 for circulation can be reduced.

In order to prevent high-temperature flue gas from entering a gap between the driving shaft 5 and the sleeve 7.1 and forming a corrosion dead zone, as shown in fig. 8 and 9, sealing fillers 10 are filled at two ends of the sleeve 7.1, so that friction between the sleeve 7.1 and the driving shaft 5 can be avoided on one hand, and high-temperature flue gas can be prevented from entering the sleeve 7.1 from the gap between the sleeve 7.1 and the driving shaft 5 and causing corrosion of the dead zone on the other hand.

When the baffle blade 2 is fully opened, the blade 2 is parallel to the flow direction of the flue gas, and the flow rate of the flue gas is maximum at the moment. However, the angle of the existing baffle blade 2 when being fully opened is not controllable, and in the actual operation process, the blade end position cannot be guaranteed to be just in a fully opened state, so that the flow of smoke is affected, and therefore the opening angle of the baffle blade 2 needs to be limited. For this reason, be provided with in casing 1 and be used for spacing stopper 8 to baffle blade 2 rotation angle, stopper 8 is fixed on the inner wall of casing 1, and every baffle blade 2 symmetry sets up two stoppers 8.

As shown in fig. 10, 11, and 12, when the barrier blade 2 is fully opened, the barrier blade 2 contacts the stopper 8 for stopping. The limiting block 8 can be arranged on the four-bar linkage mechanism 4, but due to the amplification effect of the four-bar linkage mechanism 4, even if the four-bar linkage mechanism 4 and the limiting block 8 generate a little limiting error, the opening angle of the baffle blade 2 can be greatly influenced.

As shown in fig. 13, in order to avoid the baffle blade 2 from being damaged by the corner on the stopper 8 when coming into contact with the stopper, the stopper 8 is an arc surface with the stopper surface in contact with the baffle blade 2. It should be noted that the cross section of the limiting block 8 may be approximately rectangular, or may be any round cross section such as circular or U-shaped, but it should be noted that a buffer transition surface is provided. In addition, the shape of the stopper 8 may be changed as the fixing position thereof on the housing 1 is changed, but it is ensured that the position and shape of the stopper 8 do not hinder the opening of the barrier blade 2.

As shown in fig. 14 and 15, in order to reduce the occupation of the flow-through space by the limiting block 8, the limiting block 8 is arranged on the fixing rod 7, so that the baffle blades 2 can be prevented from crossing the preset end position, the flow of the flue gas is ensured, and the trouble of connecting the limiting block 8 by arranging the position on the inner wall of the shell 1 can be avoided. As shown in fig. 1, in order to prevent the high-temperature flue gas in the flue from corroding and sluggish the actuator, in this embodiment, the flue is vertically arranged, the flue gas flows from bottom to top, one of the two baffle blades 2 is arranged on one side of the flue gas outlet of the flow port 3.1, and the other baffle blade 2 is arranged on one side of the flue gas inlet of the flow port 3.1. Due to the design, on one hand, the four-bar mechanism 4 on the baffle blade 2 at the flue gas outlet side can be prevented from being corroded by flue gas, and the baffle blade 2 at the side can be reliably opened in an emergency; on the other hand, when the emergency stop occurs, for example, power failure occurs suddenly, and the driving mechanism 6 fails, the flue gas inlet side baffle blade 2 can be automatically opened under the action of self gravity, so that accidents caused by overhigh pressure in the heating furnace can be prevented.

Example 2:

an anti-jamming flapper valve for a heating furnace flue as described in example 1, in contrast to example 1:

as shown in fig. 16, in the present embodiment, the flue of the heating furnace is a square cylindrical tube, and therefore the casing 1 is also a square cylindrical casing. The valve partition plate 3 is a rectangular partition plate, two rectangular circulation ports 3.1 are arranged on the rectangular partition plate, and the two circulation ports 3.1 are uniformly distributed on the rectangular partition plate. The baffle blades 2 are rectangular in shape corresponding to the shape of the flow openings 3.1. For a cylindrical shell, as the number of baffle vanes 2 increases, the vane sizes differ significantly, and the different vanes need to be machined separately. For the square cylindrical shell, no matter how the number of the baffle blades 2 is increased, the size of each blade can be the same, so that the processing and the manufacturing of the square cylindrical shell blades are more convenient.

As shown in fig. 17, the flue is horizontally arranged, the flue gas flows from right to left, and the two baffle blades 2 are symmetrically arranged on one side of the flue gas outlet of the circulation port 3.1. Due to the design, on one hand, the four-bar mechanism 4 on the side baffle plate blade 2 at the flue gas outlet can be prevented from being corroded by flue gas; on the other hand, when the emergency stop is carried out, one baffle blade 2 of the two baffle blades 2 can be automatically opened under the action of self gravity, so that the accident caused by overhigh pressure in the heating furnace is prevented.

Example 3:

as shown in fig. 18, the number of the baffle blades 2 is even, in this embodiment, the number of the baffle blades 2 is 4, when the housing 1 is vertically disposed, two baffle blades 2 are disposed on one side of the flue gas inlet of the flow port 3.1, and the other two baffle blades 2 are disposed on one side of the flue gas outlet of the flow port 3.1.

As shown in fig. 19, when the casing 1 is horizontally disposed, four baffle blades 2 are disposed on one side of the flue gas outlet of the circulation port 3.1, and the two baffle blades 2 on the upper portion are disposed symmetrically to the two baffle blades 2 on the lower portion.

As can be seen from the embodiment 1 and the embodiment 2, the two arrangement modes can ensure that at least one baffle blade 2 is automatically opened under the action of self gravity when the emergency stop occurs, so that accidents caused by overhigh pressure in the heating furnace are prevented.

The part of the utility model not detailed is prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An anti-jamming baffle valve for a heating furnace flue comprises a valve partition plate (3) arranged in a shell (1), wherein the valve partition plate (3) is provided with at least two flow openings (3.1), each flow opening (3.1) is provided with a baffle blade (2) for opening and closing the flow opening (3.1), and the baffle blades (2) are connected with a four-bar mechanism (4); the method is characterized in that: each four-bar linkage (4) is connected with a respective driving mechanism (6); at least one baffle blade (2) is arranged on one side of the flue gas outlet of the circulation opening (3.1).

2. An anti-jamming flapper valve for a heating furnace flue as claimed in claim 1 wherein: the casing (1) is a cylindrical casing, the valve partition plate (3) is a circular partition plate, at least two circulation ports (3.1) are arranged on the circular partition plate, and the circulation ports (3.1) are uniformly distributed along the circumferential direction of the circular partition plate.

3. An anti-jamming flapper valve for a heating furnace flue as claimed in claim 1 wherein: casing (1) is the square tube shape casing, valve baffle (3) are the rectangle baffle, are equipped with two circulation mouth (3.1) at least on the rectangle baffle, circulation mouth (3.1) evenly distributed is on the rectangle baffle.

4. An anti-jamming flapper valve for a heating furnace flue as claimed in claim 1 wherein: the number of the baffle blades (2) is even, when the shell (1) is vertically arranged, half of the baffle blades (2) are arranged on one side of a flue gas inlet of the circulating port (3.1), and the other half of the baffle blades (2) are arranged on one side of a flue gas outlet of the circulating port (3.1); when the shell (1) is horizontally arranged, the baffle blades (2) are arranged on one side of the smoke outlet of the circulation port (3.1) and are symmetrically arranged.

5. An anti-jamming flapper valve for a heating furnace flue as claimed in claim 1 wherein: the four-bar mechanism (4) comprises a swing rod (4.1) connected with the baffle blade (2), and the swing rod (4.1) is hinged with the free ends of the driving rod (4.2) and the driven rod (4.3) respectively; the fixed end of the driving rod (4.2) is connected with a driving shaft (5), and the driving shaft (5) is connected with a driving mechanism (6); the fixed end of the driven rod (4.3) is hinged to the fixed rod (7), and the fixed rod (7) is fixed to the inner wall of the shell (1).

6. An anti-jamming flapper valve for a heating furnace flue as claimed in claim 5 wherein: one end of the swing rod (4.1) connected with the baffle plate blade (2) is a flat plate, a main support hinged with the free end of the driving rod (4.2) is arranged in the middle of the flat plate, and a pair of side supports are arranged on two sides of the main support; the number of the driven rods (4.3) is two, and a pair of side supporting seats are respectively hinged with the free ends of the two driven rods (4.3); a pair of fixed rods (7) is arranged on the inner wall of the shell (1), and the pair of fixed rods (7) are respectively hinged with the fixed ends of the two driven rods (4.3).

7. An anti-jamming flapper valve for a heating furnace flue as claimed in claim 6 wherein: the fixed rod (7) comprises a sleeve (7.1), the sleeve (7.1) is sleeved outside the driving shaft (5), one end of the sleeve (7.1) is fixed on the inner wall of the shell (1), and the other end of the sleeve is provided with a hinged seat (7.2) which is used for being hinged with the fixed end of the driven rod (4.3).

8. An anti-jamming flapper valve for a flue of a heating furnace as claimed in claim 5, 6 or 7 wherein: be provided with on dead lever (7) and be used for spacing stopper (8) to baffle blade (2) rotation angle, when baffle blade (2) is opened completely, baffle blade (2) and stopper (8) contact spacingly, and the spacing face of stopper (8) and baffle blade (2) contact is the arc surface.

9. An anti-jamming flapper valve for a heating furnace flue as claimed in claim 1 wherein: a limiting block (8) used for limiting the rotating angle of the baffle plate blade (2) is arranged in the shell (1), and the limiting block (8) is fixed on the inner wall of the shell (1); when the baffle plate blade (2) is completely opened, the baffle plate blade (2) is in contact with the limiting block (8) for limiting, and the limiting surface of the limiting block (8) in contact with the baffle plate blade (2) is an arc surface.

10. An anti-jamming flapper valve for a heating furnace flue as claimed in claim 1 wherein: a sealing surface of the flow opening (3.1) is provided with a soft sealing material (9), and when the baffle blade (2) is completely closed, the baffle blade (2) seals the flow opening (3.1) through the soft sealing material (9).