CN211502767U

CN211502767U - Flue gas backward flow formula combustor

Info

Publication number: CN211502767U
Application number: CN201922218216.6U
Authority: CN
Inventors: 徐宝芳; 李微琴; 徐云雷; 黄文君
Original assignee: Yueqing Yideli Burner Co ltd
Current assignee: Yueqing Yideli Burner Co ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-09-15
Anticipated expiration: 2029-12-11

Abstract

The utility model relates to the technical field of burners, and aims to provide a flue gas backflow type burner which comprises a combustion cylinder, a combustion head, a fan and a gas valve group; the gas valve group is provided with a gas control device; an air inlet cover is arranged at an air inlet of the fan, and an air quantity adjusting device is arranged on the air inlet cover; the air inlet cover is also provided with a return pipe connected with a boiler chimney; the backflow butterfly valve comprises a servo motor, a valve rod connected to an output shaft of the servo motor, and a valve plate rotationally connected to the inside of the backflow pipe by taking the valve rod as a shaft; one end of the valve rod penetrates to the outer side of the return pipe, and an indicating rod is arranged at the end part along the radial direction. The servo motor is used for controlling the valve rod to rotate, and the valve rod drives the valve plate to rotate in the return pipe, so that the flow of the smoke passing through the return pipe is controlled; and the indicating rod is convenient for operators to observe the rotating angle of the valve rod so as to determine the size of a channel opened by the valve plate in the return pipe.

Description

Flue gas backward flow formula combustor

Technical Field

The utility model relates to a technical field of combustor, in particular to flue gas backward flow formula combustor.

Background

In recent years, the economic growth of China is rapid, the energy consumption is remarkably improved, and the problem of environmental pollution caused by the energy consumption is increasingly severe. At present, the environmental protection department in China has higher and higher requirements on the emission limit of pollutants generated by combustion. For this reason, reducing nitrogen oxide emissions is one of the main goals of current combustor designs.

The above prior art solutions have the following drawbacks: the flow of air and fuel gas can be respectively controlled by the air quantity regulating device and the fuel gas regulating device, and the flow of the returned flue gas does not have any control measure, so that the regulation of the mixing ratio of the air and the fuel gas is not facilitated.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, one of the purposes of the utility model is to provide a flue gas backward flow formula combustor can control the flue gas backward flow volume, has the effect of the air-conditioning gas mixture ratio of being convenient for.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a flue gas reflux type burner comprises a combustion cylinder, a combustion head arranged at the front end of the combustion cylinder, a fan arranged at the rear end of the combustion cylinder and a gas valve group; the gas valve group is provided with a gas control device; an air inlet cover is arranged at an air inlet of the fan, and an air quantity adjusting device is arranged on the air inlet cover; the air inlet cover is also provided with a return pipe connected with a boiler chimney; the backflow butterfly valve comprises a servo motor, a valve rod connected to an output shaft of the servo motor, and a valve plate rotationally connected to the inside of the backflow pipe by taking the valve rod as a shaft; one end of the valve rod penetrates to the outer side of the return pipe, and an indicating rod used for indicating the rotation angle of the valve plate is arranged at the end part along the radial direction.

By adopting the technical scheme, the servo motor is utilized to control the valve rod to rotate, and the valve rod drives the valve plate to rotate in the return pipe, so that the flow of the smoke passing through the return pipe is controlled; and the indicating rod is convenient for operators to observe the rotating angle of the valve rod so as to determine the size of a channel opened by the valve plate in the return pipe.

The utility model discloses further set up to: the return pipe is provided with a mounting plate for mounting the servo motor, and the mounting plate is perpendicular to the valve rod; the mounting plate and the return pipe are arranged at intervals to form a movable space; the output shaft of the servo motor and the end part of the valve rod are connected in the movable space, and the indicating rod is arranged at one end of the valve rod connected with the output shaft; and the mounting plate is provided with an observation hole for observing the rotation angle of the indicating rod.

Through adopting above-mentioned technical scheme, utilize the observation hole to be convenient for operating personnel to observe the turned angle of instruction lever.

The utility model discloses further set up to: the observation hole is arc-shaped around the axial lead of the valve rod, and the radius of the arc is smaller than the length of the indicating rod; the mounting panel is provided with first angulometry scale along the circular arc direction of observation hole on the lateral wall of back of flow pipe.

By adopting the technical scheme, when an operator observes the indicating rod through the observation hole, the rotating angle of the indicating rod can be determined according to the scale pointed by the indicating rod.

The utility model discloses further set up to: the end of the indicating rod is provided with an indicating needle which extends towards the direction of the mounting plate and penetrates through the observation hole, and the indicating needle is arranged in parallel with the axis line of the valve rod.

By adopting the technical scheme, the scales pointed by the indicating needle can be conveniently determined by an operator, and the reading accuracy is improved.

The utility model discloses further set up to: an arc-shaped plate bent along the arc direction is arranged on one side, close to the axial lead, of the observation hole on the mounting plate, and the arc-shaped plate extends towards the direction far away from the return pipe; a second angle measurement scale is arranged on the upper end face of the arc plate along the arc direction; the end of the indicating needle extends to the second angle measuring scale.

Through adopting above-mentioned technical scheme, utilize pointer and the pointed second angulation scale of pointer, the operating personnel of being convenient for carries out the reading to valve rod turned angle from different angles.

The utility model discloses further set up to: the arc-shaped plate is connected to one side, close to the axial lead, in the observation hole in a sliding mode along the axial lead, and a gap for the pointer to penetrate through is reserved between the arc-shaped plate and the upper end wall of the observation hole; one end of the arc-shaped plate, which is close to the backflow pipe, is provided with a fixed plate extending towards the axial lead direction, and the fixed plate is provided with a fixed hole; the mounting plate is provided with a fixing screw rod corresponding to the position of the fixing hole, and the fixing screw rod is provided with a fixing nut for fixing the fixing plate.

Through adopting above-mentioned technical scheme, make the arc can dismantle and connect on the mounting panel, be convenient for change different scales.

The utility model discloses further set up to: the output shaft of the servo motor is connected with the valve rod through a coupler, and the coupler comprises a driving block fixedly connected with the output shaft of the servo motor, a driven block fixedly connected with the valve rod and a sliding block connected between the driving block and the driven block; the indicating rod is fixedly connected to the driven block along the radial direction of the valve rod.

By adopting the technical scheme, the output shaft of the servo motor and the valve rod are connected by the coupler, so that the buffering and vibration damping effects are realized, and the dynamic performance of the shafting is improved.

The utility model discloses further set up to: the driven block is provided with a fastening hole, and one side of the fastening hole is provided with a key slot; the lower end of the indicating rod is provided with a fastening block in interference fit with the fastening hole, and one side of the fastening block is provided with a positioning key matched with the key groove; when the positioning key is positioned in the key groove, the indicating needle penetrates through the observation hole along the axial lead direction of the valve rod.

By adopting the technical scheme, the angle of the indicating rod is positioned by utilizing the positioning key and the key groove, so that the indicating needle can accurately point to the scale along the axial lead direction of the valve rod.

To sum up, the beneficial effects of the utility model are that:

1. the servo motor is used for controlling the valve rod to rotate, and the valve rod drives the valve plate to rotate in the return pipe, so that the flow of the smoke passing through the return pipe is controlled; the rotating angle of the valve rod can be conveniently observed by an operator through the indicating rod, so that the size of a channel opened by the valve plate in the return pipe can be conveniently determined;

2. utilize the pointer to point to the second angulation scale on the arc, the operating personnel of being convenient for carries out the reading to valve rod turned angle from the angle of difference.

Drawings

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

FIG. 2 is a schematic diagram of an explosion structure of the backflow butterfly valve and the mounting plate of the present invention;

FIG. 3 is an enlarged schematic view at A in FIG. 1;

fig. 4 is a schematic sectional structure diagram of the coupler and the indicating rod of the present invention.

Reference numerals: 1. a combustion can; 2. a burner head; 3. a fan; 31. an air inlet cover; 32. an air volume adjusting device; 4. a gas valve group; 41. a gas control device; 5. a return pipe; 51. mounting a plate; 511. an observation hole; 512. a first angularity scale; 513. fixing the screw rod; 514. fixing a nut; 52. an activity space; 53. an arc-shaped plate; 531. a fixing plate; 5311. a fixing hole; 532. a second angularity scale; 6. a backflow butterfly valve; 61. a servo motor; 62. a valve stem; 63. a valve plate; 64. an indication lever; 641. an indicator needle; 642. a fastening block; 643. a positioning key; 7. a coupling; 71. an active block; 72. a driven block; 721. a fastening hole; 722. a keyway; 73. a slide block.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiment discloses a flue gas backward flow formula combustor, as shown in fig. 1, including a combustion section of thick bamboo 1, the one end of a combustion section of thick bamboo 1 is worn to the furnace body and is provided with in the tip and is used for lighting and spraying flame's combustion head 2, and the other end of a combustion section of thick bamboo 1 is located the furnace body outside and has in end connection has and is used for the fan 3 towards the air of blowing in 1 of a combustion section of thick bamboo and is used for leading into the gas valves 4 of gas in combustion head 2. The gas valve group 4 is provided with a gas control device 41 for controlling gas flow, an air inlet of the fan 3 is fixedly connected with an air inlet cover 31 with an opening at the lower end, and an air volume adjusting device 32 is arranged at the opening at the lower end of the air inlet cover 31; the instantaneous flow rates of the gas and the air are controlled by the gas control device 41 and the air volume adjusting device 32, respectively.

As shown in fig. 1 and 2, a return pipe 5 is further connected to the chimney of the furnace body in a branched manner, and the other end of the return pipe 5 is connected to the air inlet cover 31, so as to introduce the flue gas generated after combustion into the fan 3, thereby achieving the effects of diluting oxygen in the air and reducing the emission of nitrogen oxides. The return pipe 5 is connected with one end of the air inlet cover 31 and is provided with a return butterfly valve 6, and the return butterfly valve 6 comprises a valve rod 62, a valve plate 63 fixedly connected to the valve rod 62 and a servo motor 61 for driving the valve rod 62 to rotate; the return pipe 5 is fixedly connected with an installation plate 51 for installing a servo motor 61, and a movable space 52 is formed between the installation plate 51 and the return pipe 5 at intervals; the mounting plate 51 is perpendicular to the output shaft of the servo motor 61, the output shaft of the servo motor 61 and one end of the valve rod 62 located in the movable space 52 are connected with a same axis line through the coupler 7, and one end of the valve rod 62 far away from the servo motor 61 is rotatably connected in the return pipe 5 along the radial direction of the return pipe 5, so that the valve plate 63 located in the return pipe 5 is used for controlling the size of the flow area of the return pipe 5.

As shown in fig. 2 and 4, the coupling 7 includes a driving block 71 fixedly connected to the output shaft of the servo motor 61, a driven block 72 fixedly connected to the valve rod 62, and a slider 73 connected between the driving block 71 and the driven block 72. An indicating rod 64 is fixedly connected to the driven block 72 along the radial direction, and an indicating needle 641 which is parallel to the axial line of the valve rod 62 and extends towards the mounting plate 51 is welded at the end part of the indicating rod 64; the mounting plate 51 is provided with an observation hole 511 for observing the rotation angle of the indicating rod 64, the observation hole 511 is in an arc shape around the axis of the valve rod 62, the radius of the arc is smaller than the length of the indicating rod 64, and the indicating needle 641 can pass through the observation hole 511; and a first angularity scale 512 (see fig. 3) is provided on the side wall of the mounting plate 51 facing away from the return pipe 5 in the direction of the arc of the observation hole 511. By observing the position of the first protractor scale 512 to which the pointer 641 passes through the observation hole 511 points, the operator can determine the angle of rotation of the valve stem 62 to determine the size of the passage opened by the valve plate 63 in the return pipe 5.

As shown in fig. 2 and 4, the driven block 72 has a fastening hole 721 opened along the radial direction, and one side of the fastening hole 721 facing the mounting plate 51 has a key slot 722 penetrated toward the outside; a fastening block 642 in interference fit with the fastening hole 721 is integrally formed at the lower end of the indication rod 64, and a positioning key 643 in fit with the key slot 722 is arranged at one side of the fastening block 642; the angle of the indicating rod 64 is positioned by the positioning key 643 and the key slot 722, so that the indicating needle 641 can accurately pass through the observation hole 511 in the axial line direction of the valve rod 62 and point to the scale.

As shown in fig. 2 and 3, an arc plate 53 curved in an arc direction is detachably mounted on the mounting plate 51 on a side of the observation hole 511 close to the axis. The arc plate 53 is connected to one side of the observation hole 511 close to the axis in a sliding manner along the axis, and a gap for the pointer 641 to pass through is reserved between the arc plate 53 and the upper end wall of the observation hole 511; the arc plate 53 extends in a direction away from the return pipe 5, a fixing plate 531 extending in the axial lead direction is welded at one end of the arc plate 53 close to the return pipe 5, a fixing hole 5311 is formed in the fixing plate 531, a fixing screw 513 is welded at a position, corresponding to the fixing hole 5311, on the mounting plate 51, and a fixing nut 514 used for fixing the fixing plate 531 and the mounting plate 51 together is connected to the fixing screw 513 in a threaded manner. The upper end surface of the arc plate 53 is provided with a second angle measurement scale 532 along the arc direction, and the end of the pointer 641 extends to the second angle measurement scale 532. The second angle scale 532 pointed by the pointer 641 and the pointer 641 is used to facilitate the operator to read the rotation angle of the valve stem 62 from different angles.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A flue gas reflux type combustor comprises a combustion cylinder (1), a combustion head (2) arranged at the front end of the combustion cylinder (1), a fan (3) arranged at the rear end of the combustion cylinder (1) and a gas valve group (4); the gas valve group (4) is provided with a gas control device (41); an air inlet cover (31) is arranged at an air inlet of the fan (3), and an air volume adjusting device (32) is arranged on the air inlet cover (31); a return pipe (5) connected with a boiler chimney is also arranged on the air inlet cover (31); the method is characterized in that: the backflow butterfly valve (6) is arranged on the backflow pipe (5), and the backflow butterfly valve (6) comprises a servo motor (61), a valve rod (62) connected to an output shaft of the servo motor (61), and a valve plate (63) rotatably connected into the backflow pipe (5) by taking the valve rod (62) as a shaft; one end of the valve rod (62) penetrates to the outer side of the return pipe (5), and an indicating rod (64) used for indicating the rotation angle of the valve plate (63) is arranged at the end part along the radial direction.

2. The flue gas recirculation burner of claim 1, wherein: the return pipe (5) is provided with a mounting plate (51) for mounting a servo motor (61), and the mounting plate (51) is perpendicular to the valve rod (62); a movable space (52) is formed between the mounting plate (51) and the return pipe (5) at intervals; the output shaft of the servo motor (61) and the end part of the valve rod (62) are connected in the movable space (52), and the indicating rod (64) is arranged at one end of the valve rod (62) connected with the output shaft; the mounting plate (51) is provided with an observation hole (511) for observing the rotation angle of the indicating rod (64).

3. The flue gas recirculation burner of claim 2, wherein: the observation hole (511) is in an arc shape around the axis line of the valve rod (62), and the radius of the arc is smaller than the length of the indicating rod (64); the side wall of the mounting plate (51) back to the return pipe (5) is provided with a first angle measurement scale (512) along the arc direction of the observation hole (511).

4. The flue gas recirculation burner of claim 3, wherein: an indicating needle (641) extending towards the direction of the mounting plate (51) and penetrating through the observation hole (511) is arranged at the end part of the indicating rod (64), and the indicating needle (641) is arranged in parallel with the axial lead of the valve rod (62).

5. The flue gas recirculation burner of claim 4, wherein: an arc-shaped plate (53) bent along the arc direction is arranged on one side, close to the axial lead, of the observation hole (511) on the mounting plate (51), and the arc-shaped plate (53) extends towards the direction far away from the return pipe (5); a second angle measurement scale (532) is arranged on the upper end face of the arc-shaped plate (53) along the arc direction; the end of the pointer (641) extends to a second angle scale (532).

6. The flue gas recirculation burner of claim 5, wherein: the arc-shaped plate (53) is connected to one side, close to the axial lead, in the observation hole (511) in a sliding mode along the axial lead, and a gap for the pointer (641) to penetrate through is reserved between the arc-shaped plate (53) and the upper end wall of the observation hole (511); a fixing plate (531) extending towards the axial lead direction is arranged at one end, close to the return pipe (5), of the arc-shaped plate (53), and a fixing hole (5311) is formed in the fixing plate (531); the mounting plate (51) is provided with a fixing screw (513) at a position corresponding to the fixing hole (5311), and the fixing screw (513) is provided with a fixing nut (514) for fixing the fixing plate (531).

7. The flue gas recirculation burner of claim 4, wherein: the output shaft of the servo motor (61) is connected with the valve rod (62) through a coupler (7), and the coupler (7) comprises a driving block (71) fixedly connected with the output shaft of the servo motor (61), a driven block (72) fixedly connected with the valve rod (62), and a sliding block (73) connected between the driving block (71) and the driven block (72); the indicating rod (64) is fixedly connected to the driven block (72) along the radial direction of the valve rod (62).

8. The flue gas recirculation burner of claim 7, wherein: a fastening hole (721) is formed in the driven block (72), and a key groove (722) is formed in one side of the fastening hole (721); a fastening block (642) in interference fit with the fastening hole (721) is arranged at the lower end of the indicating rod (64), and a positioning key (643) matched with the key groove (722) is arranged at one side of the fastening block (642); when the positioning key (643) is located in the key groove (722), the indicator pin (641) passes through the observation hole (511) in the axial line direction of the valve rod (62).