CN215570458U

CN215570458U - Mechanical proportion adjusting mechanism for full-premix combustion of small boiler

Info

Publication number: CN215570458U
Application number: CN202122098321.8U
Authority: CN
Inventors: 雷新力; 夏文龙; 张友明; 夏文广
Original assignee: Shanghai Tancheng Electromechanical Technology Co ltd
Current assignee: Shanghai Tancheng Electromechanical Technology Co ltd
Priority date: 2021-09-01
Filing date: 2021-09-01
Publication date: 2022-01-18
Anticipated expiration: 2031-09-01

Abstract

The utility model discloses a mechanical proportion adjusting mechanism for full premix combustion of a small boiler, belonging to the technical field of full premix combustion, comprising a servo actuator, a fan air inlet and a gas butterfly valve, wherein the output end of the servo actuator is fixedly provided with a rotating shaft, the lower end of the rotating shaft is fixedly provided with a first rocker, the other end of the first rocker is rotatably connected with the gas butterfly valve, the middle position of the rotating shaft is fixedly provided with a second rocker which is connected with the fan air inlet, the fan air inlet and the gas butterfly valve are further controlled by the servo actuator, the cost is reduced, the air flow and the gas flow of the fan air inlet and the gas butterfly valve are conveniently controlled by the first rocker and the second rocker, the reliability is improved by mechanical control, the opening and closing degree of the fan air inlet is further conveniently controlled, the mechanical proportion adjusting mechanism is more precise and flexible, and the continuously optimized air-fuel ratio of a combustion system can be obtained according to different conditions, ensuring that the combustion system burns in an optimal state.

Description

Mechanical proportion adjusting mechanism for full-premix combustion of small boiler

Technical Field

The utility model relates to a proportion adjusting mechanism, in particular to a mechanical proportion adjusting mechanism for full-premix combustion of a small boiler, and belongs to the technical field of full-premix combustion.

Background

The fuel gas comprises natural gas, artificial fuel gas, liquefied petroleum gas, methane, coal gas and air, the mixture gas is fully mixed to form low-nitrogen combustion mixture gas according to the air-fuel ratio requirements of different fuel gases, the mixture gas is fully premixed and combusted, the mixture ratio of the air and the fuel gas at each combustion load point must reach an optimized state in order to ensure that the combustion is kept stable and low-nitrogen emission is achieved under different loads, but when the ratio of the air and the fuel gas is adjusted at present, two servo actuators are respectively adopted to control a fan air inlet and a fuel gas butterfly valve through a process controller, the cost is high, the interference is easy to happen, the stability is poor, and the technical requirements on debugging personnel are high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems, and provides a mechanical proportion adjusting mechanism for full-premix combustion of a small boiler, which can obviously reduce the cost, is convenient for accurately controlling an air inlet of a fan and a gas butterfly valve, is more flexible, can obtain continuously optimized air-fuel ratio of a combustion system according to different conditions, and ensures that the combustion system burns in an optimal state.

The utility model realizes the aim by the following technical scheme, a mechanical proportion adjusting mechanism for small boiler full premix combustion comprises a servo actuator, a fan air inlet and a gas butterfly valve, wherein the output end of the servo actuator is fixedly provided with a rotating shaft, the lower end of the rotating shaft is fixedly provided with a first rocker, the other end of the first rocker is rotatably connected with the gas butterfly valve, the middle position of the rotating shaft is fixedly provided with a second rocker, the other end of the second rocker is rotatably provided with a slide block cam, one side of the slide block cam is fixedly provided with an adjusting sheet, one side of the slide block cam is provided with an adjusting bolt, one side of the fan air inlet is fixedly provided with an adjusting rod, the inside of the fan air inlet is rotatably provided with an air inlet baffle, and one side of the air inlet baffle is fixedly connected with the adjusting rod, and one side of the adjusting rod is in contact with one side of the adjusting sheet, when the adjusting device is used, the rotating shaft is driven to rotate through the servo driver, so that the first rocker and the second rocker rotate, the gas butterfly valve is opened and closed when the first rocker rotates, the slider cam moves when the second rocker rotates, the adjusting rod is pushed to move, the air inlet baffle is driven to rotate, the air inlet amount of the air inlet of the fan is synchronously adjusted along with the gas amount, and the proportion adjustment of full-premix combustion is facilitated.

Preferably, in order to facilitate the pushing of the adjusting rod to rotate, the air inlet of the fan is adjusted, the slider cam is of a triangular structure, the adjusting piece is mounted on one side of the slider cam through the adjusting bolt, a guide rail is slidably clamped at the lower end of the slider cam, the slider cam is convenient to slide on the guide rail, a threaded hole is formed in one side of the slider cam, through holes are uniformly formed in one side of the adjusting piece, the adjusting bolt is inserted into the through holes, one end of the adjusting bolt is connected with the threaded hole, the adjusting piece is connected with the slider cam through the adjusting bolt, the adjusting piece is rotated through the adjusting bolt to enable the adjusting plate to move up and down, the adjusting piece can be adjusted through the adjusting bolt according to the carbon monoxide and nitrogen oxide content discharged by the boiler, and further adjusting and locking the optimal air inlet amount of each load point, and then the boiler full premix burner optimally operates in a full load section, and the adjusting sheet becomes an adjustable slide block cam profile.

Preferably, for the convenience of right the fan air intake with the gas butterfly valve is adjusted, carries out full premix burning, the one end of first rocker is rotated and is installed the gas valve connecting rod, just the one end of gas valve connecting rod is rotated and is installed the gas valve rocker, first rocker passes through the gas valve connecting rod with the gas valve rocker with the gas butterfly valve rotates mutually and is connected, the inside of gas butterfly valve is rotated and is installed the butterfly valve rod, just the intermediate position fixed mounting of butterfly valve rod has the butterfly valve plate, the gas butterfly valve passes through the butterfly valve rod with on the first rocker the gas valve rocker rotates mutually and is connected, rotate on the second rocker and install the air inlet connecting rod, just the one end of air inlet connecting rod with the slider cam rotates mutually and is connected, just the gas valve connecting rod with the waist hole has all been seted up to the one end of air inlet connecting rod, first rocker with the second rocker passes through respectively the waist hole with the gas valve connecting rod with advance The wind connecting rods are connected in a rotating mode, and the working lengths of the first rocking rod and the second rocking rod can be adjusted respectively.

The utility model has the beneficial effects that: the utility model controls the air inlet of the fan and the gas butterfly valve through the servo actuator, reduces the cost, is convenient to control the air flow and the gas flow of the air inlet of the fan and the gas butterfly valve through the first rocker and the second rocker, improves the reliability through mechanical control, is convenient to control the opening and closing degree of the air inlet of the fan by adjusting the position of the adjusting piece, is more precise and flexible, can obtain the continuously optimized air-fuel ratio of the combustion system according to different conditions, and ensures that the combustion system burns in the best state.

Drawings

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

Fig. 2 is a schematic diagram of the overall structure of the utility model after being turned over.

Fig. 3 is a schematic view of the overall structure of the inverted bottom according to the present invention.

Fig. 4 is a schematic structural view of the slider cam according to the present invention.

In the figure: 1. servo actuator, 2, fan air intake, 3, gas butterfly valve, 4, axis of rotation, 5, first rocker, 6, second rocker, 7, slider cam, 8, adjustment sheet, 9 regulation pole, 10, guide rail, 11, screw hole, 12, through-hole, 13, adjusting bolt, 14, air inlet baffle, 15, gas valve connecting rod, 16, gas valve rocker, 17, butterfly valve rod, 18, butterfly valve plate, 19, air inlet connecting rod, 20, waist hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a mechanical proportion adjusting mechanism for small boiler full premix combustion comprises a servo actuator 1, a fan air inlet 2 and a gas butterfly valve 3, wherein an output end of the servo actuator 1 is fixedly provided with a rotating shaft 4, a lower end of the rotating shaft 4 is fixedly provided with a first rocker 5, the other end of the first rocker 5 is rotatably connected with the gas butterfly valve 3, a second rocker 6 is fixedly arranged at the middle position of the rotating shaft 4, the other end of the second rocker 6 is rotatably provided with a slider cam 7, one side of the slider cam 7 is fixedly provided with an adjusting sheet 8, one side of the fan air inlet 2 is fixedly provided with an adjusting rod 9, an air inlet baffle 14 is rotatably arranged inside the fan air inlet 2, one side of the air inlet baffle 14 is fixedly connected with the adjusting rod 9, and one side of the adjusting rod 9 is in contact with one side of the adjusting sheet 8, when in use, drive axis of rotation 4 through servo driver 1 and rotate, and then make first rocker 5 and second rocker 6 rotate, and when first rocker 5 rotates, make gas butterfly valve 3 open and close, when second rocker 6 rotates, make slider cam 7 remove, and then promote to adjust pole 9 and remove, through adjusting bolt 13 and adjustment sheet 8 and then promote air inlet adjusting pole 9 and remove, drive air inlet baffle 14 and rotate, and then make the intake of fan air intake 2 adjust, be convenient for carry out the proportion regulation of full premix burning.

As a technical optimization scheme of the utility model, as shown in figure 1, a slider cam 7 is in a triangular structure, an adjusting sheet 8 is installed on one side of the slider cam 7 through an adjusting bolt 13, a guide rail 10 is slidably clamped at the lower end of the slider cam 7, a threaded hole 11 is formed in one side of the slider cam 7, through holes 12 are uniformly formed in one side of the adjusting sheet 8, the adjusting bolt 13 is inserted into the through holes 12, one end of the adjusting bolt 13 is connected with the threaded hole 11, the adjusting sheet 8 is fixedly connected with the slider cam 7 through the adjusting bolt 13, when a combustor is installed in a boiler and is subjected to thermal debugging, 7 load points are respectively adjusted in a full load section, the adjusting bolt 13 is rotated to enable the adjusting sheet 8 to move up and down relative to the position of the slider cam 7 aiming at each load point, the position of an air inlet adjusting rod 9 is controlled, and an air inlet baffle 14 is further adjusted, changing the air intake of the air inlet 2 of the fan at each load point, when debugging the air-fuel ratio of the burner, according to the actual measurement data of the boiler smoke exhaust on the external smoke analyzer, after the air intake reaches the optimized value, namely, after the air-fuel ratio of the load point reaches the optimization, fixing the upper and lower positions of the corresponding adjusting bolt 13 so as not to rotate, and then adjusting and optimizing the next load point by the same method until the air-fuel ratio of the full load section is optimized.

As a technical optimization scheme of the utility model, as shown in figure 1, one end of a first rocker 5 is rotatably provided with a gas valve connecting rod 15, one end of the gas valve connecting rod 15 is rotatably provided with a gas valve rocker 16, the first rocker 5 is rotatably connected with a gas butterfly valve 3 through the gas valve connecting rod 15 and the gas valve rocker 16, the interior of the gas butterfly valve 3 is rotatably provided with a butterfly valve rod 17, the middle position of the butterfly valve rod 17 is fixedly provided with a butterfly valve plate 18, the gas butterfly valve 3 is rotatably connected with the gas valve rocker 16 on the first rocker 5 through the butterfly valve rod 17, an air inlet connecting rod 19 is rotatably arranged on a second rocker 6, one end of the air inlet connecting rod 19 is rotatably connected with a slider cam 7, one ends of the gas valve connecting rod 15 and the air inlet connecting rod 19 are respectively provided with a waist hole 20, the first rocker 5 and the second rocker 6 are rotatably connected with the gas valve connecting rod 15 and the air inlet connecting rod 19 through the waist holes 20, when using, drive axis of rotation 4 through servo executor 1 and rotate, and then make first rocker 5 and second rocker 6 rotate, and first rocker 5 promotes gas valve connecting rod 15 and gas valve rocker 16 and rotates, and then make butterfly valve rod 17 rotate at the inside of gas butterfly valve 3, realize the linkage, and butterfly valve rod 17 drives butterfly valve plate 18 and rotates, be convenient for control gas flow, and second rocker 6 drives air inlet connecting rod 19 and rotates, make air inlet connecting rod 19 promote or stimulate slider cam 8 at guide rail 2. go up and slide, and then make adjustment sheet 8 promote regulation pole 9 and rotate, make air inlet baffle 14 rotate, be convenient for control air flow, convenient to use.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a mechanical proportion guiding mechanism for small-size boiler full premix burning, includes servo executor (1), fan air intake (2) and gas butterfly valve (3), its characterized in that: the output end fixed mounting of servo executor (1) has axis of rotation (4), just the lower extreme fixed mounting of axis of rotation (4) has first rocker (5), the other end of first rocker (5) with gas butterfly valve (3) rotate mutually and are connected, the intermediate position fixed mounting of axis of rotation (4) has second rocker (6), just the other end of second rocker (6) rotates installs slider cam (7), just one side fixed mounting of slider cam (7) has adjustment flap (8), one side fixed mounting of fan air intake (2) has regulation pole (9), just one side of adjusting pole (9) with one side of adjustment flap (8) contacts.

2. The mechanical proportioning mechanism for the full premix combustion of the small boiler according to claim 1, wherein: the slider cam (7) is of a triangular structure, and the adjusting sheet (8) is installed on one side of the slider cam (7) and is connected with a guide rail (10) in a sliding and clamping mode at the lower end of the slider cam (7).

3. The mechanical proportioning mechanism for the full premix combustion of the small boiler according to claim 1, wherein: a set of threaded holes (11) are formed in one side of the slider cam (7) at an even equal distance, through holes (12) are formed in one side of the adjusting piece (8) at an even equal distance, adjusting bolts (13) are inserted into the through holes (12), one ends of the adjusting bolts (13) are connected with the threaded holes (11) in a matched mode, and the adjusting piece (8) is installed on one side of the slider cam (7) through the adjusting bolts (13) to form a cam adjustable contour line.

4. The mechanical proportioning mechanism for the full premix combustion of the small boiler according to claim 1, wherein: an air inlet baffle (14) is rotatably arranged inside the fan air inlet (2), and one side of the air inlet baffle (14) is fixedly connected with the adjusting rod (9).

5. The mechanical proportioning mechanism for the full premix combustion of the small boiler according to claim 1, wherein: the gas valve is characterized in that a gas valve connecting rod (15) is installed at one end of the first rocker (5) in a rotating mode, a gas valve rocker (16) is installed at one end of the gas valve connecting rod (15) in a rotating mode, and the first rocker (5) is connected with the gas butterfly valve (3) in a rotating mode through the gas valve connecting rod (15) and the gas valve rocker (16).

6. The mechanical proportion adjusting mechanism for the full premix combustion of the small boiler as set forth in claim 5, wherein: the inside of gas butterfly valve (3) is rotated and is installed butterfly valve rod (17), just the intermediate position fixed mounting of butterfly valve rod (17) has butterfly valve plate (18), gas butterfly valve (3) pass through butterfly valve rod (17) with on first rocker (5) gas valve rocker (16) rotate mutually and are connected.

7. The mechanical proportioning mechanism for the full premix combustion of small-sized boilers as claimed in claim 6, wherein: an air inlet connecting rod (19) is rotatably mounted on the second rocker (6), one end of the air inlet connecting rod (19) is rotatably connected with the slider cam (7), a waist hole (20) is formed in one end of the air inlet connecting rod (19) and the gas valve connecting rod (15), and the first rocker (5) and the second rocker (6) are respectively connected with the gas valve connecting rod (15) and the air inlet connecting rod (19) in a rotating mode through the waist hole (20).