Circumferential uniform distribution graded regulation and control air door

Abstract

The utility model relates to the technical field of combustors, and discloses a circumferentially and uniformly distributed graded regulation and control air door, which comprises a machine body, a rolling support, a graded rotating sleeve, a distribution cylinder, a tail cover, a driven arm, a driver, a rotating shaft, a driving arm, a connecting rod and the like, air flowing through the air inlet is called primary air; the annular flow channel outside the primary air channel is a secondary air channel, and air flowing through the secondary air channel is called secondary air. Air enters the corresponding primary air channel and the corresponding secondary air channel in the machine body through the primary air inlet hole and the secondary air inlet hole of the grading rotating sleeve and finally flows out of the machine body from the end. Floating movement between the grading rotating sleeve and the machine body is achieved through the rolling supporting assembly, the clearance between regulation and control air doors is reduced, driving torque is reduced, repeatability precision is improved, meanwhile, the air doors are regulated and controlled in real time in an electronic ratio regulation mode, accurate matching between air and fuel gas is achieved, and stable operation of equipment is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a circumferentially uniformly distributed graded regulating air door. Background Art

[0002] The petroleum industry heating furnace is an important component of the oil and gas gathering and transportation process in oil and gas fields, and is currently mainly in the form of fuel.

[0003] However, there are a large number of natural ventilation heating furnaces and a wide variety of furnace types. They are difficult to accurately control air distribution, have high pollutant emissions, and their operating conditions are easily affected by the external environment. Especially in the northern regions with large temperature differences between winter and summer, operating stability is even more difficult to control. Utility Model Content

[0004] The utility model aims to provide a circumferentially uniformly distributed graded control damper to solve the problems in the prior art of the difficulty in accurately controlling the air distribution of natural ventilation burners, poor adaptability to working conditions, and high nitrogen oxide emissions.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A circumferentially uniformly distributed graded control damper is designed, which comprises: a body, a rolling support, a graded rotating sleeve, a distribution cylinder, a tail cover, a driven arm, a driver, a rotating shaft, a driving arm, a connecting rod, etc.

[0007] The machine body contains two independent air flow channels, of which the inner flow channel is the primary air channel, and the air flowing through it is called the primary air; the annular flow channel outside the primary air channel is the secondary air channel, and the air flowing through it is called the secondary air. The air enters the corresponding primary and secondary air channels in the machine body through the primary and secondary air inlet holes of the graded rotary sleeve, and finally flows out of the machine body from the end.

[0008] The graded rotating sleeve rotates along the axis driven by the driver, active arm, rotating shaft and driven arm, thereby increasing or reducing the air inlet area, ultimately achieving the goal of regulating air distribution.

[0009] In detail, the primary and secondary air ducts are provided with track grooves for rolling support work.

[0010] In detail, the graded rotary sleeve comprises a primary air rotary sleeve and a secondary air rotary sleeve arranged coaxially, the primary air rotary sleeve is provided with a circumferentially distributed primary air inlet hole, and the secondary air duct is provided with a circumferentially distributed secondary air inlet hole; the graded rotary sleeve is provided with an installation position for installing a rolling support.

[0011] In detail, the rolling support includes a support shaft, a rolling bearing, etc., wherein the support shaft is fixed to the mounting position of the graded rotating sleeve, and the rolling bearing rolls in the working track groove of the machine body.

[0012] In detail, the distribution cylinder comprises a cylinder body and two reinforcement rings. The cylinder body is provided with circumferentially distributed air inlet holes.

[0013] In detail, the tail cover is a circular structure, including a fire viewing window, a flame monitoring device installation interface, an ignition burner installation interface, a main burner installation interface, and a spare interface.

[0014] In detail, the driven arm, driver, rotating shaft, active arm, connecting rod, etc. constitute a driving mechanism, which is located next to the damper. Its working method is as follows: when the driver receives a working signal, it drives the rotating shaft to rotate, the rotating shaft drives the active arm, the active arm drives the connecting rod, the connecting rod drives the driven arm, and finally the driven arm drives the graded rotating sleeve to realize the adjustment of the air distribution.

[0015] The design scheme proposed by the utility model has the following beneficial effects during application:

[0016] 1. The rolling support assembly adopted in the utility model enables floating motion between the graded rotating sleeve and the machine body, reduces the clearance between the regulating dampers, reduces the driving torque, and improves the repeatability accuracy.

[0017] 2. The utility model is provided with a distribution cylinder, which can be manually pre-adjusted to further improve the adaptability.

[0018] The electronic ratio adjustment method is used to control the air damper in real time to achieve accurate matching of air and gas. This solves the problems in the existing technology, such as the difficulty in accurately controlling the air distribution of the burner, poor adaptability to working conditions, and high nitrogen oxide emissions, thus ensuring stable operation of the equipment.

[0019] 3. The utility model has the advantages of compact structure, small size, wide adaptability to furnace types, and convenient installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an assembly diagram of a circumferentially uniformly distributed graded control air door of the utility model;

[0021] Figure 2 This is a cross-sectional view of the body structure of a circumferentially uniformly distributed graded control damper of the utility model;

[0022] Figure 3 It is a cross-sectional view of a graded rotating sleeve of a circumferentially uniformly distributed graded control air door of the utility model;

[0023] Figure 4 This is a cross-sectional view of a rolling support of a circumferentially uniformly distributed graded control damper of the utility model;

[0024] Figure 5 It is a cross-sectional view of a distribution cylinder of a circumferentially uniformly distributed graded control air door of the utility model;

[0025] Figure 6 This is a layout diagram of a tail cover with circumferentially evenly distributed graded control air doors according to the utility model.

[0026] In the figure: 201-body; 202-rolling support; 203-grading rotating sleeve; 204-distribution cylinder; 205-tail cover; 206-driven arm; 207-driver; 208-rotating shaft; 209-active arm; 210-connecting rod; 301-mounting flange; 302-secondary air cylinder; 303-primary air cylinder; 304-primary air inlet hole 1; 305-secondary air inlet hole 1; 401-secondary air rotating sleeve gun ring; 402-secondary air rotating sleeve; 403-primary air Rotating sleeve; 404-primary air rotating sleeve gun ring; 405-primary air inlet hole 2; 406-secondary air inlet hole 2; 407-rolling support installation position; 501-rolling shaft; 502-rolling bearing; 601-reinforcement ring; 602-cylinder; 603-locking reinforcement ring; 604-air inlet hole; 701-fire viewing window; 702-spare interface; 703-flame monitoring equipment installation interface; 704-ignition burner installation interface; 705-main burner installation interface. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] Reference Figure 1-Figure 6 , a circumferentially uniformly distributed graded control damper, the damper includes: a body 201, a rolling support 202, a graded rotating sleeve 203, a distribution cylinder 204, a tail cover 205, a driven arm 206, a driver 207, a rotating shaft 208, an active arm 209, a connecting rod 210, etc. The body 201 contains two independent air flow channels, wherein the internal flow channel is a primary air channel, and the air flowing through it is called primary air; the annular flow channel outside the primary air channel is a secondary air channel, and the air flowing through it is called secondary air. The air enters the corresponding primary and secondary air channels in the body 201 through the primary and secondary air inlet holes of the graded rotating sleeve 203, and finally flows out of the body 201 from the end. The graded rotating sleeve 203 rotates along the axis driven by the driver 207, the active arm 209, the rotating shaft 208, and the driven arm 206, thereby increasing or reducing the air inlet area, and finally achieving the control of air distribution.

[0029] It should be further explained that the body 201 contains a coaxially arranged primary air duct 303 and a secondary air duct 302, the primary air duct 303 is provided with a circumferentially distributed primary air inlet hole 304, the secondary air duct 302 is provided with a circumferentially distributed secondary air inlet hole 305, wherein the internal flow channel is the primary air channel, and the air flowing through it is called primary air; the annular flow channel outside the primary air channel is the secondary air channel, and the air flowing through it is called secondary air; the primary and secondary air ducts are provided with track grooves for the rolling support 202 to work.

[0030] It should be further explained that the graded rotary sleeve 203 contains a coaxially arranged primary air rotary sleeve 403 and a secondary air rotary sleeve 402, the primary air rotary sleeve 403 is provided with a circumferentially distributed primary air inlet hole 405, and the secondary air cylinder 302 is provided with a circumferentially distributed secondary air inlet hole 406; the graded rotary sleeve 203 is provided with a mounting position for mounting the rolling support 202.

[0031] It should be further explained that the rolling support 202 includes a support shaft, a rolling bearing, etc., wherein the support shaft is fixed to the mounting position of the grading rotating sleeve 203 , and the rolling bearing rolls in the working track groove of the body 201 .

[0032] It should be further explained that the distribution cylinder 204 comprises a cylinder body 602, a reinforcement ring 601, and a locking reinforcement ring 603. The cylinder body 602 is provided with circumferentially distributed air inlet holes 604. The cylinder body 602 is provided with circumferentially distributed air inlet holes 604.

[0033] It should be further explained that the tail cover 205 is a circular structure, including a fire viewing window 701 , a flame monitoring device installation interface 703 , an ignition burner installation interface 704 , a main burner installation interface 705 , and a spare interface 702 .

[0034] It should be further explained that the driven arm 206, the driver 207, the rotating shaft 208, the active arm 209, the connecting rod 210 and the like constitute a driving mechanism, which is located next to the damper and works in the following manner: when the driver 207 receives a working signal, it drives the rotating shaft 208 to rotate, the rotating shaft 208 drives the active arm 209, the active arm 209 drives the connecting rod 210, the connecting rod 210 drives the driven arm 206, and finally the driven arm drives the graded rotating sleeve 203 to realize the adjustment of the air distribution.

[0035] Working method: When in use, the main burner is installed in the body 201, and the tail cover 205 is covered. The gas supply pipe of the main burner passes through the tail cover 205 corresponding to the main burner installation interface 705, and the gas supply pipe is fixed by fasteners; the flame monitoring device is installed on the flame monitoring device installation interface 703 and fastened by threads; the ignition burner is removed into the body 201 through the ignition burner installation interface 704 and fixed by fasteners; the gas enters the main burner through the main burner gas supply pipe and is ejected from the combustion head, and the ejected gas is ignited by the ignition burner; the graded rotating sleeve 203 rotates along the axis driven by the driver 207, the active arm 209, the rotating shaft 208, and the driven arm 206, so that the air inlet area is increased or reduced, and finally the air distribution is adjusted and the burner is stabilized.

[0036] Compared with the prior art, the burner head has the following advantages.

[0037] Precise air distribution: In terms of mechanical structure, a millimeter-level tiny clearance is used between the graded rotating sleeve 203 and the body 201, which realizes micro-wind control in structure; in terms of electrical control, a high-precision driver 207 is used, and the minimum working division value reaches 0.1% of the full stroke. The accuracy and repeatability of unidirectional work (only forward or only reverse work) and bidirectional work (forward and reverse alternating work) can achieve precise control.

[0038] Flexible operation: The rolling support 202 assembly is adopted to realize floating motion between the grading rotating sleeve 203 and the machine body 201, which reduces the driving torque and eliminates the sense of frustration during air distribution regulation.

[0039] Easy to maintain: the machine body 201, the grading sleeve 203, the distribution cylinder 204, the tail cover 205, etc. are all assembled in a disassembled manner, and any part of the components or assemblies can be repaired or replaced individually after being damaged; at the same time, the components or assemblies such as the driven arm 206, the driver 207, the rotating shaft 208, the active arm 209, the connecting rod 210, etc. are also split structures, which are fixed by fasteners and can also be repaired and replaced individually.

[0040] Stable combustion and improved efficiency: One of the prerequisites for stable and efficient operation is the reasonable and accurate ratio of gas and air. The damper supports the setting of the air-gas ratio according to different working conditions through high-precision electronic ratio adjustment. It also supports the preset distribution between primary and secondary air, ultimately achieving the effect of stable combustion and improved efficiency.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A circumferentially uniformly distributed graded control damper, characterized in that: The regulating damper comprises: a body (201), a rolling support (202), a graded rotating sleeve (203), a distribution cylinder (204), a tail cover (205), a driven arm (206), a driver (207), a rotating shaft (208), an active arm (209), and a connecting rod (210); the body (201) contains two independent air flow channels, wherein the inner flow channel is a primary air channel, and the annular flow channel outside the primary air channel is a secondary air channel; the body (201) contains a coaxially arranged primary air cylinder (303) and a secondary air cylinder (302); the primary air cylinder (303) is provided with a circumferentially distributed primary air inlet hole (304), and the secondary air cylinder (302) is provided with a circumferentially distributed secondary air inlet hole (305); the graded rotating sleeve (203) contains a coaxially arranged primary air rotor sleeve (403) and a secondary air rotor sleeve (402), the primary air rotor sleeve (403) is provided with two circumferentially distributed primary air inlet holes (405), the secondary air cylinder (302) is provided with two circumferentially distributed secondary air inlet holes (406), the grading rotor sleeve (203) is provided with a mounting position for installing a rolling support (202), the rolling support (202) includes a support shaft and a rolling bearing, wherein the support shaft is fixed to the mounting position of the grading rotor sleeve (203), and the rolling bearing is rollingly arranged in the working track groove of the body (201), the distribution cylinder (204) includes a cylinder body (602), a reinforcement ring (601), and a locking reinforcement ring (603), and the cylinder body (602) is provided with circumferentially distributed air inlet holes (604).

2. The circumferentially uniformly distributed graded control damper according to claim 1, characterized in that: The tail cover (205) is a circular structure, comprising a fire viewing window (701), a flame monitoring device installation interface (703), an ignition burner installation interface (704), a main burner installation interface (705), and a spare interface (702).

3. The circumferentially uniformly distributed graded control damper according to claim 2, characterized in that: The driven arm (206), the driver (207), the rotating shaft (208), the active arm (209) and the connecting rod (210) form a driving mechanism, which is located beside the damper.

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