CN216868461U - Energy-saving emission-reducing gas boiler - Google Patents
Energy-saving emission-reducing gas boiler Download PDFInfo
- Publication number
- CN216868461U CN216868461U CN202122951215.XU CN202122951215U CN216868461U CN 216868461 U CN216868461 U CN 216868461U CN 202122951215 U CN202122951215 U CN 202122951215U CN 216868461 U CN216868461 U CN 216868461U
- Authority
- CN
- China
- Prior art keywords
- gas boiler
- fixed
- energy
- glue
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 45
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 21
- 239000003292 glue Substances 0.000 claims description 48
- 238000009413 insulation Methods 0.000 claims description 21
- 230000009467 reduction Effects 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 8
- 230000007723 transport mechanism Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000003287 bathing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The utility model discloses an energy-saving emission-reducing gas boiler which comprises a gas boiler main body, and is further provided with a chimney, an emission-reducing mechanism, a net plate frame, a carrying mechanism and a supporting mechanism, wherein the carrying mechanism consists of a fixed ring, a heat-insulating mounting ring, a connecting triangular block and a carrying handle, and the supporting mechanism consists of a stable circular block, a mounting circular groove, a supporting column and a wear-resistant cushion block. According to the energy-saving emission-reducing gas boiler, the carrying mechanism is arranged on the outer wall of the gas boiler main body through the arranged fixing ring, the arranged carrying handle is convenient for lifting the gas boiler main body for carrying, the gas boiler main body is moved to a position needing to be placed, the lower end of the gas boiler main body is more stable through the arranged stabilizing round block, the arranged wear-resistant cushion block can reduce the wear of the ground to the lower end of the supporting column, the problem that the stability of the supporting mechanism is influenced due to excessive wear is avoided, and a better use prospect is brought to the technical field of energy-saving emission-reducing gas boilers.
Description
Technical Field
The utility model relates to the technical field of energy-saving emission-reducing gas boilers, in particular to an energy-saving emission-reducing gas boiler.
Background
The gas-fired boiler comprises a gas-fired water boiler, a gas-fired hot water boiler, a gas-fired steam boiler and the like, wherein the gas-fired hot water boiler is also called a gas-fired heating boiler and a gas-fired bathing boiler, the gas-fired boiler refers to a boiler with fuel gas as the name implies, and the gas-fired boiler is most economical compared with an oil-fired boiler and an electric boiler, so that most people select the gas-fired boiler as boiler equipment for steam, heating and bathing.
In the prior art, a chinese patent document with chinese patent number CN202022536052.4 describes an energy-saving emission-reducing gas boiler, wherein an energy-saving emission-reducing gas boiler is disclosed, which has the disadvantage that the existing gas boiler has the following two problems when being installed and used:
1. the existing gas boiler is inconvenient to carry.
2. The lower end of the existing gas boiler is not stable enough.
Aiming at the defects, certain adverse effects are brought to the using process of people, and therefore an energy-saving and emission-reducing gas boiler is provided, and the problems are solved.
SUMMERY OF THE UTILITY MODEL
Solves the technical problem
Aiming at the defects of the prior art, the utility model provides an energy-saving emission-reducing gas boiler which has the advantages of convenience in carrying, stability and the like and can effectively solve the problems in the background art.
Technical scheme
In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides an energy saving and emission reduction gas boiler, includes the gas boiler main part, the upper end internal surface of gas boiler main part can be dismantled and connect the chimney, the outer wall of chimney can be dismantled and connect emission reduction mechanism, the inner wall of emission reduction mechanism can be dismantled and connect the net plate frame, the middle part fixed connection transport mechanism of gas boiler main part outer wall, the lower extreme external surface fixed connection supporting mechanism of gas boiler main part.
Preferably, the carrying mechanism comprises a fixed circular ring, a heat insulation mounting ring, a connecting triangular block and a carrying handle.
Preferably, the thermal-insulated collar is located the outer wall of fixed ring, it is provided with four groups to connect the triangular block, and is located the front and back end of fixed ring and thermal-insulated collar lower extreme surface respectively, the transport handle is provided with two sets ofly, and is located the front and back end at thermal-insulated collar outer wall middle part respectively.
Preferably, be provided with the fire-proof glue between the fixed ring and the thermal-insulated collar, the outer wall of fixed ring passes through the inner wall fixed connection of fire-proof glue and thermal-insulated collar, the fixed ring with be connected and be provided with the fire-proof glue between the three hornblocks, the upper end surface of fixed ring passes through the fire-proof glue and is connected the lower extreme fixed surface of three hornblocks and be connected, thermal-insulated collar and be connected and be provided with the fire-proof glue between the three hornblocks, the upper end surface of thermal-insulated collar passes through the fire-proof glue and is connected the lower extreme fixed surface of three hornblocks and be connected, be provided with the fixed glue between thermal-insulated collar and the transport handle, the outer wall of thermal-insulated collar passes through the fixed glue and is connected with the rear end fixed surface of transport handle.
Preferably, the supporting mechanism comprises a stable round block, a mounting round slot, a supporting column and a wear-resistant cushion block.
Preferably, the installation circular groove is located the center of stabilizing the outer surface of the round block upper end, the support columns are provided with four groups, and are respectively located the front end, the rear end and the two ends of the outer surface of the stabilizing round block lower end, the wear-resistant cushion blocks are provided with four groups, and are respectively located the outer surfaces of the lower ends of the four groups of support columns.
Preferably, the installation circular groove is opened at the upper end surface of stabilizing the circle piece, be provided with the fixed glue between stabilizing the circle piece and the support column, the lower extreme surface of stabilizing the circle piece is connected through the upper end external fixed surface of fixed glue and support column, be provided with the fixed glue between support column and the stand wear pad, the lower extreme surface of support column is connected through the upper end external fixed surface of fixed glue and stand wear pad.
Compared with the prior art, the utility model has the following beneficial effects:
according to the utility model, the carrying mechanism is arranged on the outer wall of the gas boiler main body through the arranged fixed ring, the arranged carrying handle is convenient for lifting the gas boiler main body for carrying, the gas boiler main body is moved to a position to be placed, the lower end of the gas boiler main body is more stable through the arranged stable round block, the arranged wear-resistant cushion block can reduce the wear of the ground to the lower end of the supporting column, and the influence on the stability of the supporting mechanism caused by excessive wear is avoided.
Drawings
FIG. 1 is a schematic view of the overall structure of an energy-saving emission-reducing gas boiler according to the present invention.
FIG. 2 is a schematic structural diagram of a conveying mechanism in the energy-saving and emission-reducing gas boiler.
FIG. 3 is a schematic structural diagram of a support mechanism in an energy-saving and emission-reducing gas boiler according to the present invention.
FIG. 4 is a schematic view of the bottom surface structure of the support mechanism in the energy-saving and emission-reducing gas boiler of the present invention.
FIG. 5 is a schematic view of the internal structure of the support mechanism in the energy-saving and emission-reducing gas boiler.
In the figure: 1. a gas boiler main body; 2. a chimney; 3. an emission reduction mechanism; 4. a screen frame; 5. a carrying mechanism; 6. a support mechanism; 51. fixing the circular ring; 52. a thermally insulating mounting ring; 53. connecting the triangular blocks; 54. carrying the grip; 61. stabilizing the round block; 62. installing a circular groove; 63. a support pillar; 64. and (4) a wear-resistant cushion block.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Detailed description of the preferred embodiment
The embodiment is an embodiment of an energy-saving emission-reducing gas-fired boiler.
As shown in fig. 1 to 5, an energy-saving emission-reducing gas boiler comprises a gas boiler main body 1, and is the prior art by citing an energy-saving emission-reducing gas boiler of an energy-saving emission-reducing gas boiler with chinese patent No. CN202022536052.4, wherein an inner surface of an upper end of the gas boiler main body 1 is detachably connected with a chimney 2, an outer wall of the chimney 2 is detachably connected with an emission-reducing mechanism 3, an inner wall of the emission-reducing mechanism 3 is detachably connected with a mesh plate frame 4, a middle part of an outer wall of the gas boiler main body 1 is fixedly connected with a carrying mechanism 5, and an outer surface of a lower end of the gas boiler main body 1 is fixedly connected with a supporting mechanism 6.
The carrying mechanism 5 comprises a fixed ring 51, a heat insulation mounting ring 52, a connecting triangular block 53 and a carrying handle 54; the heat insulation mounting ring 52 is positioned on the outer wall of the fixed circular ring 51, four groups of connecting triangular blocks 53 are arranged and are respectively positioned at the front end and the rear end of the outer surface of the upper end and the lower end of the fixed circular ring 51 and the heat insulation mounting ring 52, and two groups of carrying handles 54 are arranged and are respectively positioned at the front end and the rear end of the middle part of the outer wall of the heat insulation mounting ring 52; the fireproof glue is arranged between the fixed ring 51 and the heat insulation mounting ring 52, the outer wall of the fixed ring 51 is fixedly connected with the inner wall of the heat insulation mounting ring 52 through the fireproof glue, the fireproof glue is arranged between the fixed ring 51 and the connecting triangular block 53, the outer surface of the upper end of the fixed ring 51 is fixedly connected with the outer surface of the lower end of the connecting triangular block 53 through the fireproof glue, the fireproof glue is arranged between the heat insulation mounting ring 52 and the connecting triangular block 53, the outer surface of the upper end of the heat insulation mounting ring 52 is fixedly connected with the outer surface of the lower end of the connecting triangular block 53 through the fireproof glue, the fixing glue is arranged between the heat insulation mounting ring 52 and the carrying handle 54, and the outer wall of the heat insulation mounting ring 52 is fixedly connected with the outer surface of the rear end of the carrying handle 54 through the fixing glue; the supporting mechanism 6 comprises a stable round block 61, a mounting round slot 62, a supporting column 63 and a wear-resistant cushion block 64; the mounting circular grooves 62 are positioned in the center of the outer surface of the upper end of the stabilizing circular block 61, four groups of supporting columns 63 are arranged and are respectively positioned at the front end, the rear end and the two ends of the outer surface of the lower end of the stabilizing circular block 61, and four groups of wear-resistant cushion blocks 64 are arranged and are respectively positioned on the outer surfaces of the lower ends of the four groups of supporting columns 63; the installation circular groove 62 is seted up at the upper end surface of stabilizing the circle piece 61, is provided with the fixed glue between stabilizing the circle piece 61 and the support column 63, and the lower extreme surface of stabilizing the circle piece 61 is connected through the fixed glue and the upper end external surface fixed connection of support column 63, is provided with the fixed glue between support column 63 and the stand wear pad 64, and the lower extreme surface of support column 63 is connected through the fixed glue and stand wear pad 64's upper end external surface fixed connection.
It should be noted that the utility model is an energy-saving emission-reducing gas boiler, which comprises a gas boiler main body 1, a chimney 2, an emission-reducing mechanism 3, a mesh plate frame 4, a carrying mechanism 5 and a supporting mechanism 6, wherein the carrying mechanism 5 comprises a fixed ring 51, a heat-insulating mounting ring 52, a connecting triangular block 53 and a carrying handle 54, the carrying mechanism 5 is mounted on the outer wall of the gas boiler main body 1 through the arranged fixed ring 51, the carrying handle 54 is mounted on the outer wall of the fixed ring 51 through the arranged heat-insulating mounting ring 52, the heat of the gas boiler main body 1 is conducted to the fixed ring 51 through the outer wall and then conducted to the heat-insulating mounting ring 52 through the fixed ring 51, the arranged heat-insulating mounting ring 52 can reduce the influence of the heat on holding the carrying handle 54, the arranged connecting triangular block 53 enables the fixed ring 51 to be more stable on the outer wall of the gas boiler main body 1, the arranged carrying handle 54 facilitates the carrying of the gas boiler main body 1, remove the position that needs to place, this energy saving and emission reduction gas boiler's supporting mechanism 6 is by stabilizing the circle piece 61, installation circular slot 62, support column 63 constitutes with stand wear and tear cushion 64, it is more stable to let 1 lower extreme of gas boiler main part through the stable circle piece 61 that sets up, the installation circular slot 62 of setting is convenient to install gas boiler main part 1 on supporting mechanism 6, four group's support columns 63 of setting let the lower extreme of supporting mechanism 6 more stable, stand wear and tear cushion 64 through the setting can reduce the wearing and tearing of ground to support column 63 lower extreme, it influences to avoid wearing and tearing excessively to lead to the stability of supporting mechanism 6 to receive.
Detailed description of the utility model
The embodiment is an embodiment of a carrying mechanism 5 used for an energy-saving and emission-reducing gas boiler.
As shown in fig. 1-2, a conveying mechanism 5 for an energy-saving emission-reducing gas boiler comprises a fixed ring 51, a heat-insulating mounting ring 52, a connecting triangular block 53 and a conveying handle 54, wherein the heat-insulating mounting ring 52 is positioned on the outer wall of the fixed ring 51, four groups of connecting triangular blocks 53 are arranged and are respectively positioned at the front end and the rear end of the outer surface of the upper end and the lower end of the fixed ring 51 and the heat-insulating mounting ring 52, two groups of conveying handles 54 are arranged and are respectively positioned at the front end and the rear end of the middle part of the outer wall of the heat-insulating mounting ring 52, fire-proof glue is arranged between the fixed ring 51 and the heat-insulating mounting ring 52, the outer wall of the fixed ring 51 is fixedly connected with the inner wall of the heat-insulating mounting ring 52 through the fire-proof glue, fire-proof glue is arranged between the fixed ring 51 and the connecting triangular block 53, the outer surface of the upper end of the fixed ring 51 is fixedly connected with the outer surface of the lower end of the connecting triangular block 53 through the fire-proof glue, fire-proof glue is arranged between the heat-insulating mounting ring 52 and the connecting triangular block 53, the outer surface of the upper end of the heat insulation mounting ring 52 is fixedly connected with the outer surface of the lower end of the connecting triangular block 53 through fireproof glue, fixing glue is arranged between the heat insulation mounting ring 52 and the carrying handle 54, and the outer wall of the heat insulation mounting ring 52 is fixedly connected with the outer surface of the rear end of the carrying handle 54 through the fixing glue.
Detailed description of the preferred embodiment
The embodiment is an embodiment of a supporting mechanism 6 used on an energy-saving emission-reducing gas boiler.
As shown in fig. 1 and 3-5, the supporting mechanism 6 for the energy-saving emission-reducing gas-fired boiler comprises a stabilizing circular block 61, a mounting circular groove 62, supporting columns 63 and wear-resistant cushion blocks 64, wherein the mounting circular groove 62 is positioned in the center of the outer surface of the upper end of the stabilizing circular block 61, four groups of the supporting columns 63 are arranged, and are respectively positioned at the front end, the rear end and the two ends of the outer surface of the lower end of the stabilizing round block 61, four groups of abrasion-resistant cushion blocks 64 are arranged, and are located the lower extreme surface of four groups of support columns 63 respectively, and installation circular slot 62 is seted up at the upper end surface of stabilizing circular block 61, is provided with the fixed glue between stabilizing circular block 61 and the support column 63, and the lower extreme surface of stabilizing circular block 61 passes through the fixed glue and is connected with the upper end surface fixed connection of support column 63, is provided with the fixed glue between support column 63 and the stand wear pad 64, and the lower extreme surface of support column 63 passes through the fixed glue and is connected with stand wear pad 64's upper end surface fixed connection.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed.
Claims (7)
1. The utility model provides an energy saving and emission reduction gas boiler, includes gas boiler main part (1), its characterized in that: the upper end internal surface of gas boiler main part (1) can be dismantled and connect chimney (2), the outer wall of chimney (2) can be dismantled and connect emission reduction mechanism (3), the inner wall of emission reduction mechanism (3) can be dismantled and connect screen frame (4), the middle part fixed connection transport mechanism (5) of gas boiler main part (1) outer wall, the lower extreme external surface fixed connection supporting mechanism (6) of gas boiler main part (1).
2. The energy-saving emission-reducing gas boiler according to claim 1, wherein: the carrying mechanism (5) comprises a fixed circular ring (51), a heat insulation mounting ring (52), a connecting triangular block (53) and a carrying handle (54).
3. The energy-saving emission-reducing gas boiler according to claim 2, wherein: the thermal-insulated collar (52) is located the outer wall of fixed ring (51), it is provided with four groups to connect triangle piece (53), and is located the front and back end of fixed ring (51) and thermal-insulated collar (52) upper and lower end surface respectively, transport handle (54) are provided with two sets ofly, and are located the front and back end in thermal-insulated collar (52) outer wall middle part respectively.
4. An energy saving and emission reduction gas boiler according to claim 3, characterized in that: fireproof glue is arranged between the fixed circular ring (51) and the heat insulation mounting ring (52), the outer wall of the fixed circular ring (51) is fixedly connected with the inner wall of the heat insulation mounting ring (52) through fireproof glue, fireproof glue is arranged between the fixed circular ring (51) and the connecting triangular block (53), the outer surface of the upper end of the fixed circular ring (51) is fixedly connected with the outer surface of the lower end of the connecting triangular block (53) through fireproof glue, fireproof glue is arranged between the heat insulation mounting ring (52) and the connecting triangular block (53), the outer surface of the upper end of the heat insulation mounting ring (52) is fixedly connected with the outer surface of the lower end of the connecting triangular block (53) through fireproof glue, a fixing glue is arranged between the heat insulation mounting ring (52) and the carrying handle (54), the outer wall of the heat insulation mounting ring (52) is fixedly connected with the outer surface of the rear end of the carrying handle (54) through fixing glue.
5. The energy-saving emission-reducing gas boiler according to claim 1, wherein: the supporting mechanism (6) comprises a stable round block (61), a mounting round groove (62), a supporting column (63) and a wear-resistant cushion block (64).
6. The energy-saving emission-reducing gas boiler according to claim 5, wherein: the installation circular groove (62) is located the center of stabilizing the outer surface of the upper end of the circular block (61), the support columns (63) are provided with four groups, and are respectively located at the front end, the rear end and the two ends of the outer surface of the lower end of the stabilizing circular block (61), the wear-resistant cushion blocks (64) are provided with four groups, and are respectively located on the outer surfaces of the lower ends of the four groups of support columns (63).
7. The energy-saving emission-reducing gas boiler according to claim 6, wherein: the upper end surface at stable disk (61) is seted up in installation circular slot (62), be provided with the fixed glue between stable disk (61) and support column (63), the lower extreme surface of stable disk (61) passes through the fixed glue and is connected with the upper end external fixed surface of support column (63), be provided with the fixed glue between support column (63) and stand wear and tear cushion (64), the lower extreme surface of support column (63) passes through the fixed glue and is connected with the upper end external fixed surface of stand wear and tear cushion (64).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122951215.XU CN216868461U (en) | 2021-11-29 | 2021-11-29 | Energy-saving emission-reducing gas boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122951215.XU CN216868461U (en) | 2021-11-29 | 2021-11-29 | Energy-saving emission-reducing gas boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216868461U true CN216868461U (en) | 2022-07-01 |
Family
ID=82127224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122951215.XU Expired - Fee Related CN216868461U (en) | 2021-11-29 | 2021-11-29 | Energy-saving emission-reducing gas boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216868461U (en) |
-
2021
- 2021-11-29 CN CN202122951215.XU patent/CN216868461U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN216868461U (en) | Energy-saving emission-reducing gas boiler | |
| CN208042102U (en) | A kind of horizontal gas-fired boiler | |
| CN216047633U (en) | Stove head distance adjusting device | |
| CN217636226U (en) | Electric wall-mounted furnace capable of preventing dry burning | |
| CN201155856Y (en) | Efficient energy-saving convection chamber of heating stove | |
| CN201187820Y (en) | Energy-assembling furnace rack | |
| CN213362628U (en) | Wall-mounted type electric heating stove side heating type light wave electric heating tube mounting structure | |
| CN205208937U (en) | Integrated form gas is from hot -water tank | |
| CN2252296Y (en) | Energy saving gas stove | |
| CN211695435U (en) | Suspension type fixing mechanism for tubular heat exchanger | |
| CN214038536U (en) | Energy-saving device for outdoor heat supply | |
| CN215637141U (en) | Comprehensive energy-saving stainless steel furnace head | |
| CN207422342U (en) | A kind of wall-hung boiler being easy for installation and removal | |
| CN213873185U (en) | Light pipe type heating furnace | |
| CN212261188U (en) | Solar heat collection type barbecue oven | |
| CN221839751U (en) | Indoor and outdoor portable stove | |
| CN218884268U (en) | Indoor temperature adjusting device based on full premix gas boiler | |
| CN210345572U (en) | Burner for gas stove | |
| CN201137958Y (en) | Energy saving fire concentrating circle of high-efficient combustor | |
| CN217082926U (en) | High-efficiency energy-saving combined solar heat pump hot water unit | |
| CN201285182Y (en) | Balcony-hanging split type solar stand | |
| CN214120198U (en) | Umbrella-shaped room heater convenient to installation | |
| CN216408931U (en) | Detachable multilayer boiler | |
| CN108343995A (en) | A kind of full top intaking air gas combustion stove of oxygen-enriched combusting | |
| CN213931485U (en) | Wall-mounted furnace support convenient to mount |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220701 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |