Environment-friendly surface treatment device for boiler equipment parts

Abstract

This invention discloses an environmentally friendly surface treatment device for boiler equipment components, comprising a treatment chamber, a workbench, a first fan, a second fan, and an exhaust pipe. The fans include a casing, an impeller, and a rotating shaft. The air inlet side of the casing has an axially extending inlet ring. The inlet ring comprises a first arc-shaped ring portion and an inlet protrusion portion. The inlet protrusion portion protrudes radially from the outer periphery of the first arc-shaped ring portion. The inlet protrusion portion includes a first side portion, an arc-shaped portion, and a second side portion connected sequentially. The first and second side portions are symmetrical about a line of symmetry passing through the rotation axis of the impeller. The angle between the first side portion and the line of symmetry is α, where 5° < α < 60°. This invention can reduce turbulence at the impeller inlet, increase the air intake, thereby increasing the fan output air volume, reducing noise, and improving fan efficiency.

Description

Technical Field

[0001] This invention relates to the field of surface treatment devices for boiler equipment parts, and specifically to an environmentally friendly surface treatment device for boiler equipment parts, which is used for surface treatment such as grinding, sandblasting or spraying of boiler equipment parts. Background Technology

[0002] An existing environmentally friendly surface treatment device for boiler equipment parts includes a treatment chamber, a workbench, a first fan, a second fan, and an exhaust pipe. The first fan is installed on the top of the treatment chamber, and the second fans are installed on both sides of the bottom of the treatment chamber. The outlet end of the second fan is connected to the exhaust pipe, and a filter and purification device is connected to the exhaust pipe. The first fan is used to supply air into the treatment chamber, and the second fan is used to exhaust the gas in the treatment chamber to achieve filtration and purification of air containing dust / impurities. The first fan or the second fan includes a shell, an impeller, and a rotating shaft. The impeller is mounted on the rotating shaft and rotatably installed in the shell. The outer periphery of the shell has an outlet pipe extending radially, and the air inlet side of the shell has an inlet ring extending axially, forming the air inlet of the fan.

[0003] The existing inlet ring is circular or nearly elliptical, but the existing fans still have significant turbulence at the impeller inlet, which affects and reduces the air volume and output. The noise and efficiency of the fans need to be further improved. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an environmentally friendly surface treatment device for boiler equipment parts. Through the design of the inlet ring of the fan, it can reduce the turbulence at the impeller inlet, increase the air intake, thereby increasing the fan output, reducing noise, and improving the fan efficiency.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An environmentally friendly surface treatment device for boiler equipment parts includes a treatment chamber, a workbench, a first fan, a second fan, and an exhaust pipe. The first fan is installed on the top of the treatment chamber, and the second fans are installed on both sides of the bottom of the treatment chamber. The outlet end of the second fan is connected to the exhaust pipe, and a filter purification device is connected to the exhaust pipe. The first or second fan includes a housing, an impeller, and a rotating shaft. The impeller is mounted on the rotating shaft and rotatably installed inside the housing. The outer periphery of the housing has an outlet pipe extending radially, and the air inlet side of the housing has an inlet ring extending axially, forming the air inlet of the fan. The inlet ring is characterized in that: the inlet ring includes a first arc-shaped ring portion and an inlet protrusion portion. The inlet protrusion portion protrudes radially from the outer periphery of the first arc-shaped ring portion. The inlet protrusion portion includes a first side portion, an arc-shaped portion, and a second side portion connected in sequence. The first side portion and the second side portion are symmetrical about a line of symmetry passing through the rotation axis of the impeller. The angle between the first side portion and the line of symmetry is α, where 5° < α < 80°.

[0006] Furthermore, 20° < a < 40°.

[0007] Furthermore, on this line of symmetry, there is a radial distance L between the outer end point of the arc-shaped portion and the outer periphery of the circle containing the first arc-shaped ring portion, and the impeller has a radius R, where L = (0.2-0.4)R.

[0008] Furthermore, grooves are provided on the first side and the second side, and multiple grooves are arranged in an array along the length direction of the first side or the second side. The axial depth of the grooves is less than the axial height of the inlet ring.

[0009] Furthermore, the housing includes an impeller cavity shell and an outlet pipe. The outlet pipe has an outlet edge and a side edge. The side edge is tangent to the outer periphery of the impeller cavity shell. The angle between the outlet edge and the line of symmetry is b, where 60° < b < 80°.

[0010] Furthermore, the angle between the side and the line of symmetry is c, where 5° < c < 25°.

[0011] Furthermore, the impeller includes blades, with multiple blades distributed circumferentially and connected to the outer circumferential surface of the rotating shaft. The leading edge of the blades has a horizontal portion, which is disposed adjacent to the inlet ring.

[0012] Furthermore, the first or second fan is a centrifugal fan, and the inlet ring is neither circular nor elliptical.

[0013] Furthermore, the first arc-shaped ring is part of a circle.

[0014] The present invention provides an environmentally friendly surface treatment device for boiler equipment parts. Through the design of the inlet ring of the fan, it can reduce turbulence at the impeller inlet, increase the air intake, thereby increasing the fan output, reducing noise, and improving fan efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the environmentally friendly surface treatment device for boiler equipment parts according to the present invention; Figure 2 This is a schematic diagram of the main structure of the fan in the environmentally friendly surface treatment device of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the fan in the environmentally friendly surface treatment device of the present invention.

[0016] In the figure: processing chamber 1, workbench 2, first fan 3, second fan 4, exhaust pipe 5, shell 31, impeller 32, blade 321, rotating shaft 33, outlet pipe 34, outlet edge 341, side edge 342, inlet ring 35, first arc-shaped ring 36, inlet protrusion 37, first side 371, second side 372, arc-shaped part 373, groove 374. Detailed Implementation

[0017] To make the technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of the present invention, and are only used to explain the present invention, not to limit the present invention. It should be noted that, for ease of description, only the parts / structures related to the present invention are shown in the accompanying drawings. Other related parts can be referred to with ordinary design. In the absence of conflict, the embodiments and technical features in the embodiments of the present invention can be combined with each other to obtain new embodiments.

[0018] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention. Furthermore, unless otherwise defined, the technical or scientific terms used in the description of this invention should have the ordinary meaning understood by those skilled in the art.

[0019] The present invention will now be described in further detail with reference to the accompanying drawings.

[0020] like Figure 1-3As shown, an environmentally friendly surface treatment device for boiler equipment parts is used for surface treatment such as grinding, polishing, sandblasting, or spraying of boiler equipment parts. It includes a treatment chamber 1, a workbench 2, a first fan 3, a second fan 4, and an exhaust pipe 5. The first fan 3 is installed on the top of the treatment chamber 1, and the second fans 4 are installed on both sides of the bottom of the treatment chamber 1. The outlet end of the second fan 4 is connected to the exhaust pipe 5, and a filter and purification device is connected to the exhaust pipe 5. The first fan 3 is used to supply air into the treatment chamber 1, and the second fan 4 is used to exhaust the gas in the treatment chamber 1, so as to achieve filtration and purification of air containing dust / impurities, reduce pollution to personnel or the environment, and is an environmentally friendly surface treatment device.

[0021] The first fan 3 or the second fan 4 includes a housing 31, an impeller 32, and a rotating shaft 33. The impeller 32 is mounted on the rotating shaft 33 and rotatably mounted inside the housing 31. The outer periphery of the housing 31 has an outlet pipe 34 extending radially, and the air inlet side of the housing 31 has an inlet ring 35 extending axially. The first fan 3 or the second fan 4 is a centrifugal fan, and the inlet ring 35 is non-circular and non-elliptical (approximately elliptical), forming the air inlet of the fan. Its characteristic is... The inlet ring 35 includes a first arc-shaped ring portion 36 and an inlet protrusion 37. The inlet protrusion 37 protrudes radially from the outer periphery of the first arc-shaped ring portion 36. The inlet protrusion 37 includes a first side portion 371, an arc-shaped portion 373, and a second side portion 372 connected in sequence. The first side portion 371 and the second side portion 372 are symmetrical about the line of symmetry XX, which passes through the rotation axis of the impeller 32. The included angle between the first side portion 371 and the line of symmetry XX is α, where 5° < α < 60°.

[0022] Furthermore, 20° < a < 40°, preferably a = 30°.

[0023] The present invention discloses an environmentally friendly surface treatment device for boiler equipment parts. Through the design of the inlet ring 35 of the fan, it can reduce turbulence at the impeller inlet, increase the air intake, thereby increasing the fan output, reducing noise, and improving fan efficiency.

[0024] On the line of symmetry XX, there is a radial distance L between the outer end point of the arc-shaped portion 373 and the outer periphery of the circle containing the first arc-shaped ring portion 36, and the impeller 32 has a radius R, where L = (0.2-0.4)R, preferably 0.3.

[0025] In one embodiment, grooves 374 are formed on the first side portion 371 and the second side portion 372. Multiple grooves 374 are arranged in an array along the length of the first side portion 371 or the second side portion 372, and the axial depth of the grooves 374 is less than the axial height of the inlet ring 35. By forming grooves 374 on the first side portion 371 and the second side portion 372, turbulence at the impeller inlet can be further reduced, and the air intake volume can be increased, thereby further improving the fan's output air volume, reducing noise, and improving fan efficiency.

[0026] In one embodiment, the housing 31 includes an impeller cavity housing and an outlet pipe 34. The outlet pipe 34 has an outlet edge 341 and a side edge 342. The side edge 342 is tangent to the outer periphery of the impeller cavity housing. The angle between the outlet edge 341 and the line of symmetry XX is b, 60° < b < 80°, preferably b = 70°.

[0027] The angle between side 342 and the line of symmetry XX is c, where 5° < c < 25°, and preferably c = 16°.

[0028] The present invention defines the relative position and relationship between the inlet protrusion 37 and the outlet pipe 34 by designing angles a, b, and c. This design can improve the smoothness of the airflow entering from the inlet protrusion 37 to the outlet pipe 34, thereby further increasing the fan's output air volume, reducing noise, and improving the fan's efficiency.

[0029] The impeller 32 includes blades 321, a plurality of blades 321 are distributed circumferentially and connected to the outer peripheral surface of the rotating shaft 33, and the leading edge of the blades 321 has a horizontal / straight portion, the horizontal portion being disposed adjacent to the inlet ring 35.

[0030] The first arc-shaped ring 36 is part of a circle.

[0031] The present invention discloses an environmentally friendly surface treatment device for boiler equipment parts. Through the design of the inlet ring 35 of the fan, it can reduce turbulence at the impeller inlet, increase the air intake, thereby increasing the fan output, reducing noise, and improving fan efficiency.

[0032] The above embodiments are illustrative of the present invention and not intended to limit the invention. It is understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly surface treatment device for boiler equipment parts, comprising a treatment chamber (1), a workbench (2), a first fan (3), a second fan (4), and an exhaust pipe (5). The first fan is installed on the top of the treatment chamber, and the second fan is installed on both sides of the bottom of the treatment chamber. The outlet end of the second fan is connected to the exhaust pipe, and a filter purification device is connected to the exhaust pipe. The first fan or the second fan comprises a housing (31), an impeller (32), and a rotating shaft (33). The impeller is mounted on the rotating shaft and rotatably mounted inside the housing. The outer periphery of the housing has an outlet pipe (34) extending radially, and the air inlet side of the housing has an inlet ring (35) extending axially, which forms the air inlet of the fan. Its features are: The inlet ring includes a first arc-shaped ring portion (36) and an inlet protrusion portion (37). The inlet protrusion portion protrudes radially from the outer periphery of the first arc-shaped ring portion. The inlet protrusion portion includes a first side portion (371), an arc-shaped portion (373), and a second side portion (372) connected in sequence. The first side portion and the second side portion are symmetrical about a line of symmetry that passes through the rotation axis of the impeller. The angle between the first side portion and the line of symmetry is α, where 20° < α < 40°. On this line of symmetry, there is a radial distance L between the outer end point of the arc-shaped portion and the outer periphery of the circle containing the first arc-shaped ring portion, and the impeller has a radius R, where L = (0.2-0.4)R. Grooves (374) are provided on the first side and the second side. Multiple grooves are arranged in an array along the length of the first side or the second side. The axial depth of the grooves is less than the axial height of the inlet ring.

2. The environmentally friendly surface treatment device for boiler equipment parts as described in claim 1, characterized in that, The housing includes an impeller cavity shell and an outlet pipe (34). The outlet pipe has an outlet edge (341) and a side edge (342). The side edge is tangent to the outer periphery of the impeller cavity shell, and the angle between the outlet edge and the line of symmetry is b, where 60° < b < 80°.

3. The environmentally friendly surface treatment device for boiler equipment parts as described in claim 2, characterized in that, The angle between the side and the line of symmetry is c, where 5° < c < 25°.

4. The environmentally friendly surface treatment device for boiler equipment parts as described in claim 1, characterized in that, The impeller includes blades (321), multiple blades are distributed circumferentially and connected to the outer circumferential surface of the rotating shaft, and the leading edge of the blades has a horizontal portion, which is disposed adjacent to the inlet ring.

5. An environmentally friendly surface treatment device for boiler equipment parts as described in claim 1, characterized in that, The first arc-shaped ring is part of a circle.

Images