Kiln with independently adjustable gas spray guns

Abstract

The utility model discloses a kiln with an independently adjustable gas spray gun. The kiln comprises a kiln frame body, a conveying assembly and a pressurizing gas spray gun, the kiln frame body is a shell of which the middle part is provided with a heating cavity; the conveying assembly is horizontally arranged in the heating cavity of the kiln frame body; the left end and the right end of the kiln frame body are provided with a feeding port and a discharging port respectively. The conveying assembly is used for conveying a to-be-heated workpiece; and the plurality of pressurizing gas spray guns are divided into two layers, are respectively arranged on the upper side and the lower side of the conveying assembly, and are fixedly arranged on the front side plate and the rear side plate of the kiln frame body. According to the kiln with the independently-adjustable gas spray guns, combustion-supporting air can be pressurized and accelerated, and the combustion efficiency is improved; the spraying speed is increased, the operation stroke is increased, the flame adjustability is improved, and energy consumption is reduced; high-temperature gas forms stirring and whirlwind due to pressure difference, so that workpieces are uniformly heated, and the heat absorption efficiency is high; the temperature loss is reduced, so that the energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of kilns, in particular to a kiln with an independently adjustable gas spray gun. Background Art

[0002] Existing kilns such as roller kilns and tunnel kilns have the following problems:

[0003] The combustion-supporting air volume and speed of each gas spray gun in the kiln cannot be adjusted independently. When the temperature in the kiln is uneven, the gas and combustion-supporting air (the combustion-supporting air referred to in this application refers to preheated high-temperature air) of the gas spray gun in the low-temperature area cannot be increased individually to increase combustion and raise the temperature in the corresponding area of the kiln.

[0004] The hot air in the kiln cannot effectively form a cyclone and flow, resulting in low heat absorption efficiency of the workpiece and no energy saving;

[0005] Longer gas spray guns, due to the length of the spray gun tube, do not have enough combustion air supply, resulting in an imbalance in the air-fuel ratio (the mass ratio between air and fuel in the mixture), incomplete combustion of the gas, forming carbon deposits and clogging the gas nozzle.

[0006] Most of the combustion-supporting air used in gas spray guns on the market has no additional external power to pressurize it to spray out at high speed, resulting in a fixed stroke of the combustion-supporting air and gas after they are sprayed out from the burner. The operating stroke of the spray gun cannot be adjusted, resulting in poor stirring of the temperature atmosphere in the furnace, low heat absorption efficiency of the product, and large temperature difference. Utility Model Content

[0007] The purpose of the utility model is to provide a kiln with an independently adjustable gas 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 the injection speed, increase the operating stroke, increase the flame adjustability, and reduce energy consumption; the high-temperature gas forms stirring and cyclones due to the pressure difference, so that the workpiece is heated evenly, the heat absorption efficiency is high, and the temperature loss is reduced, thereby reducing energy consumption.

[0008] In order to solve the above technical problems, the technical solution of the utility model is:

[0009] A kiln with independently adjustable gas spray guns, comprising a kiln frame, a conveying assembly, and a pressurized gas spray gun;

[0010] The kiln frame is a shell with a heating cavity in the middle; the conveying assembly is horizontally arranged in the heating cavity of the kiln frame; the left and right ends of the kiln frame are respectively provided with a feed port and a discharge port;

[0011] The conveyor assembly is used to transport the workpieces to be heated within the kiln. Common workpieces to be heated include ceramic tiles and porcelain. The conveyor assembly includes a power unit and several horizontally arranged rollers, each connected to the power unit's ends to rotate the rollers. The workpieces to be heated are placed on the upper surface of the conveyor assembly.

[0012] A plurality of pressurized gas spray guns are divided into two layers, an upper layer and a lower layer, which are respectively arranged on the upper and lower sides of the conveying component and fixed on the kiln frame.

[0013] The pressurized gas spray gun includes a spray gun housing, a gas conduit, a gas nozzle, a burner, and a combustion-supporting air pressurization component;

[0014] The spray gun housing is a cylindrical housing with an open front end and an inner cavity in the middle, and a bearing mounting seat is provided at the rear end;

[0015] The rear end of the spray gun housing is also provided with a pressurizing chamber, which is communicated with the inner cavity;

[0016] The combustion-supporting air booster assembly is located within the booster chamber and includes a booster impeller, a rotating shaft, bearings, a motor, a heat dissipation impeller, and a heat-insulating sleeve. The motor is fixed to the rear end of the spray gun housing, with its output shaft connected to the rotating shaft. A bearing is sleeved on the outer wall of the rotating shaft, and the bearing is mounted within a bearing mounting seat. The outer wall of the front end of the rotating shaft is sleeved with a heat-insulating sleeve, and the outer wall of the heat-insulating sleeve is sleeved with the booster impeller, while the outer wall of the rear end is sleeved with the heat dissipation impeller.

[0017] The motor drives the rotating shaft and the boost impeller to rotate, thereby pressurizing the combustion-supporting air in the boost chamber, so that the combustion-supporting air passes through the inner cavity of the spray gun shell at high speed and is ejected from the front side, thereby increasing the ejection stroke of the combustion-supporting air.

[0018] The heat dissipation impeller can cool the motor, and a filter is provided on the outside of the heat dissipation impeller to isolate debris.

[0019] An air inlet is provided on one side of the boost chamber, and the air inlet is connected to a combustion-supporting air source.

[0020] The gas conduit is a pipe body with a guide cavity in the middle. It 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.

[0021] The burner is disc-shaped and is installed at the front opening (gas outlet) of the spray gun housing to fully mix the fuel gas and combustion-supporting air;

[0022] The burner is provided with a plurality of gas outlet holes 1, which pass through the front and rear end surfaces of the burner (obliquely pass through); the plurality of gas outlet holes 1 are arranged in a ring around the center of the burner.

[0023] A mounting hole is provided in the middle of the burner, and the gas nozzle is arranged in the mounting hole;

[0024] 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.

[0025] The burner has a plurality of oblique air cavities arranged on the annular outer wall thereof in a spirally inclined ring. The air ejected from the spiral rotation wraps around the outside of the gas, and the combustion-supporting air ejected from the gas outlet holes cross-mixes with the gas.

[0026] Preferably, the booster gas spray gun includes a short tube spray gun 102 and a long tube spray gun 101 in terms of size specifications; the short tube spray gun 102, the long tube spray gun 101, the short tube spray gun 102, and the long tube spray gun 101 are arranged in the order of the front side plate and the rear side plate of the kiln frame; the short tube spray gun 102 and the long tube spray gun 101 are arranged adjacent to each other; the booster gas spray guns on the front side plate and the rear side plate are staggered.

[0027] 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.

[0028] Optionally, the rotating shaft and the motor output shaft are integrally formed.

[0029] Since the combustion-supporting air is preheated high-temperature air, the booster impeller in contact with the combustion-supporting air will form a high temperature due to heat conduction. Providing a heat-insulating sleeve between the booster impeller and the motor output shaft can effectively avoid the high temperature of the motor and ensure the service life of the motor and a normal working environment.

[0030] Beneficial effects of the utility model:

[0031] Its structure is simple and reasonable, and its operation is stable and reliable. It can efficiently mix gas and air to improve combustion efficiency; increase the injection speed, increase the flame length, and increase the working stroke; by adjusting the gas injection speed, the high-temperature gas in the furnace is stirred, so that the workpiece is heated evenly, the heat absorption efficiency is increased, the temperature loss is reduced, and the energy consumption is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of a kiln with independently adjustable gas spray guns according to the present invention;

[0033] Figure 2 This is a schematic structural diagram of the pressurized gas spray gun of the present invention;

[0034] Figure 3 This is a cross-sectional view of the pressurized gas spray gun of the present invention;

[0035] Figure 4 This is a schematic structural diagram of the gas nozzle and burner of the present utility model. DETAILED DESCRIPTION

[0036] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the descriptions of these embodiments are intended to aid understanding of the present invention and do not constitute limitations on the present invention. Furthermore, the technical features involved in the various embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.

[0037] like Figure 1-4 As shown, a kiln with independently adjustable gas spray guns includes a kiln frame 8, a conveying assembly 9, and a pressurized gas spray gun 10;

[0038] The kiln frame 8 is a shell with a heating chamber 81 in the middle; the conveying assembly 9 is horizontally arranged in the heating chamber 81 of the kiln frame 8; the left and right ends of the kiln frame 8 are respectively provided with a feed port and a discharge port;

[0039] The conveyor assembly 9 is used to transport the workpiece to be heated, responsible for conveying the workpiece within the kiln. Common workpieces to be heated include ceramic tiles and porcelain. The conveyor assembly 9 includes a power unit and several rollers 91. These rollers 91 are arranged horizontally and side by side, with their ends connected to the power unit, which drives the rollers 91 to rotate. The power unit includes a conveyor motor and a drive sprocket, which are conventional and will not be described here. The workpiece to be heated is placed on the upper surface of the conveyor assembly 9.

[0040] A plurality of pressurized gas spray guns 10 are divided into upper and lower layers, respectively disposed on the upper and lower sides of the conveying assembly 9 , and fixedly mounted on the front side plate and the rear side plate of the kiln frame 8 .

[0041] The pressurized gas spray gun 10 includes a spray gun housing 1, a gas conduit 2, a gas nozzle 3, a burner 4, and a combustion air pressurization assembly 5;

[0042] The spray gun housing 1 is a cylindrical housing with an open front end and an inner cavity 11 in the middle, and a bearing mounting seat 6 is provided at the rear end.

[0043] The rear end of the spray gun housing 1 is further provided with a boost chamber 7, which is communicated with the inner chamber 11;

[0044] The combustion-supporting air boosting assembly 5 is disposed within the boosting chamber 7 and includes a boosting impeller 51, a rotating shaft 52, a bearing 53, a motor 54, a heat dissipation impeller 55, and a heat-insulating sleeve 56. The motor 54 is fixed to the rear end of the spray gun housing 1, with its output shaft connected to the rotating shaft 52. A bearing 53 is sleeved on the outer wall of the rotating shaft 52, and the bearing 53 is disposed within the bearing mounting seat 6. The outer wall of the front end of the rotating shaft 52 is sleeved with a heat-insulating sleeve 56, and the outer wall of the heat-insulating sleeve 56 is sleeved with the boosting impeller 51, and the outer wall of the rear end of the rotating shaft 52 is sleeved with the heat dissipation impeller 55.

[0045] The motor 54 drives the rotating shaft 52 and the boost impeller 51 to rotate, thereby pressurizing the combustion-supporting air in the boost chamber 7, so that the combustion-supporting air passes through the inner cavity 11 of the spray gun housing 1 at high speed and is ejected from the front side, thereby increasing the ejection stroke of the combustion-supporting air.

[0046] The heat dissipation impeller 55 can cool the motor 54 . A filter 57 is provided on the outside of the heat dissipation impeller 55 to isolate foreign matter.

[0047] An air inlet 71 is provided on one side of the boost chamber 7 , and the air inlet 71 is connected to a combustion-supporting air source through a pipeline.

[0048] The gas conduit 2 is a pipe body with a 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 22 and its front end connected to the gas nozzle 3.

[0049] The burner 4 is disc-shaped and is mounted on the front opening (gas outlet) of the spray gun housing 1 to fully mix the fuel gas and the combustion-supporting air.

[0050] The burner 4 is provided with a plurality of gas outlet holes 41 , which pass through the front and rear end surfaces of the burner 4 (obliquely pass through); the plurality of gas outlet holes 41 are arranged in a ring around the center of the burner 4 .

[0051] A mounting hole is provided in the middle of the burner 4, and the gas nozzle 3 is arranged in the mounting hole;

[0052] The gas nozzle 3 is provided with a plurality of gas outlet holes 2 32 , which are radially arranged at the front end of the gas nozzle 3 .

[0053] The burner 4 has a plurality of oblique air cavities 43 arranged on the annular outer wall thereof in a spirally inclined ring. The spirally rotating air is wrapped around the outside of the gas, and the combustion-supporting air ejected from the gas outlet holes is cross-mixed with the gas.

[0054] Preferably, the booster gas spray gun 10 includes a short tube spray gun 102 and a long tube spray gun 101 in terms of size specifications; the short tube spray gun 102, the long tube spray gun 101, the short tube spray gun 102, and the long tube spray gun 101 are arranged in the order of arrangement on the front side plate and the rear side plate of the kiln frame 8; the short tube spray gun 102 and the long tube spray gun 101 are arranged adjacent to each other; the booster gas spray guns 10 on the front side plate and the rear side plate are staggered.

[0055] Preferably, to facilitate product assembly, the spray gun housing 1 includes a front shell 12 and a rear shell 13, and the front shell 12 and the rear shell 13 are connected by threaded connection, welding, snap connection, etc.

[0056] Optionally, the rotating shaft 52 and the output shaft of the motor 54 are integrally formed.

[0057] Since the combustion-supporting air is preheated high-temperature air, the booster impeller 51 in contact with the combustion-supporting air will form a high temperature due to heat conduction. An insulating sleeve 56 is provided between the booster impeller 51 and the output shaft of the motor 54, which can effectively avoid the high temperature of the motor 54 and ensure the service life of the motor 54 and the normal working environment.

[0058] 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. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and the changes still fall within the scope of protection of the present invention.

Claims

1. A kiln with independently adjustable gas spray guns, characterized by: Including kiln frame, conveying components, and pressurized gas spray gun; The kiln frame is a shell with a heating cavity in the middle; the conveying assembly is horizontally arranged in the heating cavity of the kiln frame; the left and right ends of the kiln frame are respectively provided with a feed port and a discharge port; The conveying assembly is used to convey the workpiece to be heated; A plurality of pressurized gas spray guns are divided into two layers and are respectively arranged on the upper and lower sides of the conveying component and are fixed on the front side plate and the rear side plate of the kiln frame.

2. The kiln with independently adjustable gas spray guns according to claim 1, characterized in that: The pressurized gas spray gun comprises a spray gun housing, a gas conduit, a gas nozzle, a burner, and a combustion-supporting air pressurization component.

3. The kiln with independently adjustable gas spray guns according to claim 2, characterized in that: The spray gun housing is a cylindrical housing with an open front end and an inner cavity in the middle, and a bearing mounting seat is provided at the rear end; The rear end of the spray gun housing is also provided with a pressurizing chamber, which is communicated with the inner cavity; The combustion-supporting air boosting assembly is arranged in the boosting chamber, and includes a boosting impeller, a rotating shaft, a bearing, a motor, a heat dissipation impeller, and a heat-insulating sleeve; the motor is fixed to the rear end of the spray gun housing, and its output shaft is connected to the rotating shaft; the outer wall of the rotating shaft is sleeved with a bearing, and the bearing is arranged in a bearing mounting seat; the outer wall of the front end of the rotating shaft is sleeved with a heat-insulating sleeve, the outer wall of the heat-insulating sleeve is sleeved with a boosting impeller, and the outer wall of the rear end is sleeved with a heat dissipation impeller.

4. The kiln with independently adjustable gas spray guns according to claim 3, characterized in that: The gas conduit is a pipe body with a 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; An air inlet is provided on one side of the boost chamber, and the air inlet is connected to a combustion-supporting air source through a pipeline.

5. The kiln with independently adjustable gas spray guns according to claim 4, 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 pass through the front and rear end surfaces of the burner; the plurality of gas outlet holes 1 are arranged in a ring around the center of the burner; 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 kiln with independently adjustable gas spray guns according to claim 5, 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 are radially arranged at the front end of the gas nozzle.

7. The kiln with independently adjustable gas spray guns according to any one of claims 1 to 6, characterized in that: The boost gas spray guns include short tube spray guns and long tube spray guns in terms of size specifications; the short tube spray guns and long tube spray guns are arranged adjacent to each other; the boost gas spray guns on the front side plate and the rear side plate are staggered.

8. The kiln with independently adjustable gas spray guns according to claim 3, characterized in that: The spray gun housing includes a front shell and a rear shell, and the front shell and the rear shell are connected by threads; The rotating shaft and the motor output shaft are integrally formed.

9. The kiln with independently adjustable gas spray guns according to claim 3, characterized in that: The conveying assembly includes a power component and a plurality of rollers. The plurality of rollers are arranged horizontally side by side, and their ends are connected to the power component, which drives the rollers to rotate. The power component includes a conveying motor and a transmission sprocket.

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