Natural gas efficient energy-saving spray gun

Abstract

The utility model discloses an efficient and energy-saving natural gas spray gun which comprises a spray gun shell, a fuel gas guide pipe, a fuel gas spray head, a burner and an air pressurization assembly. The spray gun shell is a columnar shell with an opening in the front end and an inner cavity in the middle, and a bearing mounting seat is arranged at the rear end of the spray gun shell; the air pressurizing assembly is arranged in an inner cavity of the spray gun shell and comprises fan blades, a rotating shaft, a bearing and a motor. The rotating shaft penetrates through the middle of the spray gun shell, and the outer wall of the rear side of the rotating shaft is sleeved with a bearing. The bearing is arranged in the bearing mounting seat; the rear end of the rotating shaft is connected with a motor output shaft; the fuel gas guide pipe is a pipe body with a flow guide cavity in the middle and is arranged in the middle of the spray gun shell, the tail end of the fuel gas guide pipe is connected with the fuel gas input pipe, and the front end of the fuel gas guide pipe is connected with the fuel gas nozzle. According to the efficient and energy-saving natural gas spray gun, fuel gas and air can be efficiently mixed, and the combustion efficiency is improved; the flame length is increased, and the operation stroke is increased; and high-temperature gas forms cyclone and vortex, so that the workpiece is uniformly heated.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas combustion equipment, in particular to a natural gas high-efficiency energy-saving spray gun. Background Art

[0002] Existing natural gas spray guns have the problem of uneven mixing of natural gas and air during the combustion process, resulting in low combustion efficiency, wasted energy, and possible environmental pollution. In addition, the structural design of some spray guns is unreasonable and cannot adapt to the combustion requirements under different working conditions. For example, in working conditions such as ceramic kilns and industrial kilns, the flame sprayed by the spray gun needs to have a long stroke, and the high-temperature gas is preferably formed into a whirlwind and vortex, so that the workpiece in the furnace can be heated more evenly. However, the spray guns currently on the market cannot meet the above requirements.

[0003] Most natural gas burners on the market use a method where gas is discharged from the middle and combustion-supporting air (high-speed air flow) is discharged from the periphery to surround the gas in the middle for mixing. However, this method cannot efficiently mix gas and air, resulting in incomplete combustion, low combustion efficiency, and energy waste. At the same time, the combustion-supporting air has no external power to pressurize it to spray out at high speed, resulting in a shorter travel of the combustion-supporting air and gas after being sprayed out from the burner, a shorter flame column formed by gas combustion, and a shorter operating travel of the spray gun. Utility Model Content

[0004] The utility model aims to provide a natural gas high-efficiency energy-saving spray gun, which has a simple and reasonable structure and stable and reliable operation; can efficiently mix gas and air to improve combustion efficiency; increase flame length and increase operating stroke; high-temperature gas forms a cyclone to heat the workpiece evenly.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A natural gas high-efficiency energy-saving spray gun, comprising a spray gun housing, a gas conduit, a gas nozzle, a burner, and an air pressurizing component;

[0007] The spray gun housing is a columnar housing with an opening at the front end and an inner cavity in the middle, and a bearing mounting seat at the rear end;

[0008] The air pressurizing assembly is arranged in the inner cavity of the spray gun housing, and includes a fan blade, a rotating shaft, a bearing, and a motor; the rotating shaft is arranged in the middle of the spray gun housing, and a bearing is sleeved on the outer wall of the rear side; the bearing is arranged in a bearing mounting seat; the rear end of the rotating shaft is connected to the motor output shaft, or the rotating shaft and the motor output shaft are integrally formed. The motor drives the rotating shaft to rotate and the fan blade to rotate, thereby pressurizing the air and airflow in the inner cavity of the spray gun housing, so that the airflow is ejected from the front side at a high speed, and the ejection stroke of the airflow is increased.

[0009] The gas conduit is a pipe body with a flow guide cavity in the middle, which is arranged in the middle of the spray gun housing, with its tail end connected to the gas input pipe and its front end connected to the gas nozzle.

[0010] Preferably, in order to reasonably arrange and optimize the product structure, a cylindrical cavity is provided in the middle of the rotating shaft, and the gas conduit is passed through the cylindrical cavity. The cylindrical cavity serves as a clearance hole.

[0011] The burner is disc-shaped and is installed at the front opening (gas outlet) of the spray gun housing to fully mix the gas and air;

[0012] The burner is provided with a plurality of gas outlet holes 1, which penetrate the front and rear end surfaces of the burner (obliquely penetrate); the plurality of gas outlet holes 1 are arranged in a ring around the center of the burner.

[0013] A mounting hole is provided in the middle of the burner, and the gas nozzle is arranged in the mounting hole;

[0014] The gas nozzle is provided with a plurality of gas outlet holes 2, and the plurality of gas outlet holes are radially arranged at the front end of the gas nozzle.

[0015] The annular outer wall of the burner is evenly provided with a plurality of oblique air chambers, which are arranged on the annular outer wall of the burner in a spirally inclined ring. The air ejected by the spiral rotation wraps around the outside of the gas, and the air ejected from the gas outlet hole is cross-mixed with the gas.

[0016] Preferably, to facilitate product assembly, the spray gun housing includes a front shell and a rear shell, and the front shell and the rear shell are connected by threaded connection, welding, snap connection, etc.

[0017] Beneficial effects of the utility model:

[0018] Its structure is simple and reasonable, and its operation is stable and reliable. It can efficiently mix fuel gas and air to improve combustion efficiency. It can increase the flame length and the operating stroke. The high-temperature gas forms a cyclone to heat the workpiece evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a natural gas high-efficiency energy-saving spray gun of the utility model;

[0020] Figure 2 This is a top view of a natural gas high-efficiency energy-saving spray gun of the utility model;

[0021] Figure 3 for Figure 2 Sectional view in the AA direction;

[0022] Figure 4 This is a schematic diagram of the structure decomposition of a natural gas high-efficiency energy-saving spray gun according to another embodiment of the utility model;

[0023] Figure 5 A top view of a natural gas high-efficiency energy-saving spray gun according to another embodiment of the utility model;

[0024] Figure 6 for Figure 5 Cross-sectional view along the DD direction. DETAILED DESCRIPTION

[0025] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] like Figure 1-6 As shown, a natural gas high-efficiency energy-saving spray gun includes a spray gun housing 1, a gas conduit 2, a gas nozzle 3, a burner 4, and an air pressurizing component 5;

[0027] The spray gun housing 1 is a columnar housing with an opening at the front end and an inner cavity 11 in the middle, and a bearing mounting seat 12 at the rear end;

[0028] The air pressurizing assembly 5 is arranged in the inner cavity 11 of the spray gun housing 1, and includes a fan blade 51, a rotating shaft 52, a bearing 53, and a motor 54; the rotating shaft 52 is arranged in the middle of the spray gun housing 1, and a bearing 53 is sleeved on the outer wall of the rear side; the bearing 53 is arranged in the bearing mounting seat 12; the rear end of the rotating shaft 52 is connected to the output shaft of the motor 54, or the rotating shaft 52 and the output shaft of the motor 54 are integrally formed. The motor 54 drives the rotating shaft 52 and the fan blade 51 to rotate, thereby pressurizing the air and airflow in the inner cavity 11 of the spray gun housing 1, so that the airflow is ejected from the front side at a high speed, and the ejection stroke of the airflow is increased.

[0029] The gas conduit 2 is a pipe body with a flow guide cavity 21 in the middle. It is arranged in the middle of the spray gun housing 1, with its tail end connected to the gas input pipe 6 and its front end connected to the gas nozzle 3.

[0030] Preferably, in order to reasonably arrange and optimize the product structure, a cylindrical cavity 55 is provided in the middle of the rotating shaft 52, and the gas conduit 2 is passed through the cylindrical cavity 55. The cylindrical cavity 55 serves as a clearance hole.

[0031] The burner 4 is disc-shaped and is installed at the front opening (gas outlet) of the spray gun housing 1 to fully mix the gas and air;

[0032] The burner 4 is provided with a plurality of gas outlet holes 41 , which penetrate the front and rear end surfaces of the burner 4 (obliquely penetrate); the plurality of gas outlet holes 41 are arranged in a ring around the center of the burner 4 .

[0033] A mounting hole is provided in the middle of the burner 4, and the gas nozzle 3 is arranged in the mounting hole;

[0034] The gas nozzle 3 is provided with a plurality of gas outlet holes 31 , and the plurality of gas outlet holes 31 are radially arranged at the front end of the gas nozzle 3 .

[0035] A plurality of oblique air chambers 43 are evenly distributed on the annular outer wall of the burner 4, and the plurality of oblique air chambers 43 are arranged in a spirally inclined ring on the annular outer wall of the burner 4. The air ejected by the spiral rotation wraps around the outside of the gas, and the ejected air and the gas are cross-mixed.

[0036] Preferably, to facilitate product assembly, the spray gun housing 1 includes a front shell 13 and a rear shell 14, and the front shell 13 and the rear shell 14 are connected by threaded connection, welding, snap connection, etc.

[0037] As another embodiment of the air pressurizing assembly 5, the air pressurizing assembly 5 further includes a driving gear 56 and a driven gear 57. The driven gear 57 is sleeved on the outer wall of the rear end of the rotating shaft 52, and the driving gear 56 is sleeved on the outer wall of the output shaft of the motor 54. The driving gear 56 and the driven gear 57 are meshed and connected. This facilitates the installation of the motor 54, and the motor 54 and the rotating shaft 52 are staggered (staggered from the same axis).

[0038] Optionally, an air inlet 7 is further provided on the outer wall of the spray gun housing 1 .

[0039] Optionally, it further includes a motor mounting seat 58 , which is fixedly mounted on the rear end of the spray gun housing 1 , and the motor 54 is fixedly mounted on the motor mounting seat 58 .

[0040] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A natural gas high-efficiency energy-saving spray gun, comprising a spray gun housing, a gas conduit, a gas nozzle, and a burner, characterized in that: Also included is an air pressurization assembly; The spray gun housing is a columnar housing with an opening at the front end and an inner cavity in the middle, and a bearing mounting seat at the rear end; The air pressurizing assembly is arranged in the inner cavity of the spray gun housing, and includes a fan blade, a rotating shaft, a bearing, and a motor; the rotating shaft is arranged in the middle of the spray gun housing, and a bearing is sleeved on the outer wall of the rear side; the bearing is arranged in the bearing mounting seat; the rear end of the rotating shaft is connected to the output shaft of the motor; The gas conduit is a pipe body with a flow guide cavity in the middle, which is arranged in the middle of the spray gun housing, with its tail end connected to the gas input pipe and its front end connected to the gas nozzle.

2. The natural gas high-efficiency energy-saving spray gun according to claim 1, characterized in that: The burner is disc-shaped and mounted on the front opening of the spray gun housing; The burner is provided with a plurality of gas outlet holes 1, which penetrate the front and rear end surfaces of the burner; and the plurality of gas outlet holes 1 are arranged in a ring around the center of the burner.

3. The natural gas high-efficiency energy-saving spray gun according to claim 2 is characterized in that: A mounting hole is provided in the middle of the burner, and the gas nozzle is arranged in the mounting hole; The gas nozzle is provided with a plurality of gas outlet holes 2, and the plurality of gas outlet holes 2 are radially arranged at the front end of the gas nozzle.

4. The natural gas high-efficiency energy-saving spray gun according to claim 3 is characterized in that: A cylindrical cavity is provided in the middle of the rotating shaft, and the gas conduit is passed through the cylindrical cavity.

5. The natural gas high-efficiency energy-saving spray gun according to claim 4, characterized in that: A plurality of oblique air cavities are evenly distributed on the annular outer wall of the burner, and the plurality of oblique air cavities are arranged on the annular outer wall of the burner in a spirally inclined ring.

6. The natural gas high-efficiency energy-saving spray gun according to any one of claims 1 to 5, characterized in that: The air pressurizing component also includes a driving gear and a driven gear; the driven gear is sleeved on the outer wall of the rear end of the rotating shaft, and the driving gear is sleeved on the outer wall of the motor output shaft, and the driving gear and the driven gear are meshed and connected.

7. The natural gas high-efficiency energy-saving spray gun according to claim 5, characterized in that: The spray gun housing comprises a front shell and a rear shell, and the front shell and the rear shell are connected by threads.

8. The natural gas high-efficiency energy-saving spray gun according to claim 7, characterized in that: The rotating shaft and the motor output shaft are integrally formed.

9. The natural gas high-efficiency energy-saving spray gun according to claim 5, characterized in that: The outer wall of the spray gun housing is also provided with an air inlet.

10. The natural gas high-efficiency energy-saving spray gun according to claim 6, characterized in that: It also includes a motor mount.

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