Suspended air inlet furnace end combustion device

Abstract

The utility model relates to the technical field of gas stoves, in particular to a furnace end combustion device with suspended air inlet, which is provided with a gas inlet pipe, a gas jet hole, a combustor gas inlet pipe and a combustor gas inlet, an air inlet gap is arranged between the combustor gas inlet and the gas jet hole, gas is conveyed to the gas jet hole through the gas inlet pipe, and the gas is fed into the combustor gas inlet pipe through the air inlet gap. The arrangement of the air inlet gap enables external air to smoothly enter the burner air inlet pipe through the burner air inlet, full contact of the gas and the air is effectively ensured, full burning of the gas is ensured, and the problem that when an existing furnace end works, the gas is not prone to being burnt is effectively solved. The problems that fuel gas and air need to be mixed for sufficient combustion, however, due to the leakproofness of a gas cooker, fuel gas cannot be in sufficient contact with sufficient air, fuel gas combustion is incomplete, fuel gas waste is caused, and potential safety hazards in the using process are increased are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas stoves, in particular to a burner combustion device with suspended air intake. Background Art

[0002] As cooking technology and industrial heating demands continue to evolve, burners, as core components of gas cooktops and industrial heating equipment, play a crucial role. By efficiently mixing fuel and air and igniting them, they produce a stable, adjustable flame. This not only meets the precise temperature control requirements of the cooking process, but also improves energy efficiency and safety, making them an indispensable technical component of modern kitchens and industrial heating.

[0003] When the burner of an existing gas stove is working, gas and air need to be mixed for sufficient combustion. However, due to the airtightness of the gas stove, the gas often cannot fully contact with sufficient air, resulting in incomplete gas combustion and gas waste. In addition, incomplete gas combustion will also produce harmful gases, increasing safety hazards during use.

[0004] The present invention is proposed in view of the deficiencies in the prior art. Utility Model Content

[0005] In view of the above-mentioned existing burners, when working, gas and air need to be mixed for full combustion. However, due to the airtightness of the gas stove, the gas often cannot fully contact with sufficient air, resulting in incomplete gas combustion, which not only causes gas waste but also increases safety hazards during use. The technical solution adopted by the present invention to solve the technical problem is:

[0006] A burner combustion device with suspended air inlet comprises a burner body, a mounting base connected to the burner body, a gas inlet pipe and a gas jet hole communicating with the gas inlet pipe being provided on the mounting base, a burner assembly being provided on the burner body, the burner assembly comprising a burner inlet pipe and a burner inlet located on a side of the burner inlet pipe close to the gas jet hole, an air inlet gap communicating with the outside being provided between the burner inlet and the gas jet hole.

[0007] Furthermore, a gas outlet pipe is provided on the mounting base and is arranged toward the burner air inlet. The gas jet holes are located on the gas outlet pipe, and the burner air inlet pipe and the gas outlet pipe are suspended in the air.

[0008] Furthermore, a mounting base for mounting the burner assembly is provided on the burner body, and a connecting assembly is provided between the mounting base and the mounting base.

[0009] Furthermore, the burner assemblies are arranged at intervals along the circumferential direction of the mounting base, and the burner air inlet pipes and the gas outlet pipes are arranged correspondingly.

[0010] Furthermore, the connecting assembly includes a first connecting column and a second connecting column, one end of the first connecting column is located in the middle of the mounting base, the other end of the first connecting column is located in the middle of the mounting base, and the second connecting column is arranged at intervals along the circumferential direction of the mounting base.

[0011] Furthermore, the gas outlet pipe and the burner air inlet pipe are coaxially arranged, and the size of the burner air inlet is larger than the size of the gas injection hole.

[0012] Furthermore, the outer wall of the burner air inlet pipe is provided with a thread that is threadedly connected to the mounting base, so that the burner assembly can be installed on the mounting base.

[0013] Furthermore, the burner assembly also includes a burner communicated with the burner air inlet pipe, the burner includes a combustion chamber with an upward opening, and a combustion spacer located on the combustion chamber, wherein the combustion spacer is provided with a plurality of combustion holes.

[0014] Furthermore, the burner air inlet pipe is threadedly connected to the burner at a side away from the gas injection hole.

[0015] Furthermore, a support column arranged in a vertical direction is provided at the bottom of the mounting base, and a reinforcing rib is provided between the mounting base and the support column.

[0016] The beneficial effects of the utility model are as follows:

[0017] The utility model discloses a gas inlet pipe and a gas jet hole, wherein the gas inlet pipe and the gas jet hole are communicated with each other, and the burner assembly comprises a burner inlet pipe and a burner inlet port, and the burner inlet pipe and the burner inlet port are communicated with each other, and an air inlet gap that is communicated with the outside is provided between the burner inlet pipe and the gas jet hole. The gas is transported to the gas jet hole through the burner inlet port and is transported to the burner inlet pipe through the burner inlet port, thereby supplying the burner assembly with combustion gas. The provision of the air inlet gap allows external air to smoothly pass through the burner inlet port and enter the burner inlet pipe, which is conducive to ensuring sufficient contact between gas and air, thereby ensuring sufficient combustion of gas, and effectively solves the problem that the existing burner head needs to mix gas and air for sufficient combustion when working. However, due to the airtightness of the gas stove, the gas is often unable to fully contact with sufficient air, resulting in incomplete combustion of the gas, which not only causes gas waste, but also increases safety hazards during use.

[0018] The present invention will be further described below with reference to the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is one of the structural diagrams of the connection between the burner body and the mounting base of the utility model;

[0020] Figure 2 This is a schematic structural diagram of the burner body of the present invention;

[0021] Figure 3 This is a structural diagram of the mounting base of the utility model;

[0022] Figure 4 This is the second structural diagram of the connection between the burner body and the mounting base of the utility model;

[0023] Figure 5 for Figure 4 Schematic cross-sectional view along line AA;

[0024] Figure 6 This is an exploded schematic diagram of the connection between the burner body and the mounting base of the present invention. DETAILED DESCRIPTION

[0025] The following describes the embodiments of the present invention in detail with reference to the accompanying drawings.

[0026] like Figures 1 to 6 The burner combustion device shown in the figure has a suspended air inlet, comprising a burner body 1, a mounting base 2 connected to the burner body 1, a gas inlet pipe 3 provided on the mounting base 2, and a gas jet hole 41 communicating with the gas inlet pipe 3. The burner body 1 is provided with a burner assembly 5, the burner assembly 5 comprising a burner inlet pipe 51, a burner inlet port 52 located on a side of the burner inlet pipe 51 proximal to the gas jet hole 41, and an air inlet gap 6 communicating with the outside provided between the burner inlet port 52 and the gas jet hole 41.

[0027] The utility model discloses a gas inlet pipe and a gas jet hole, wherein the gas inlet pipe and the gas jet hole are communicated with each other, and the burner assembly comprises a burner inlet pipe and a burner inlet port, and the burner inlet pipe and the burner inlet port are communicated with each other, and an air inlet gap that is communicated with the outside is provided between the burner inlet pipe and the gas jet hole. The gas is transported to the gas jet hole through the burner inlet port and is transported to the burner inlet pipe through the burner inlet port, thereby supplying the burner assembly with combustion gas. The provision of the air inlet gap allows external air to smoothly pass through the burner inlet port and enter the burner inlet pipe, which is conducive to ensuring sufficient contact between gas and air, thereby ensuring sufficient combustion of gas, and effectively solves the problem that the existing burner head needs to mix gas and air for sufficient combustion when working. However, due to the airtightness of the gas stove, the gas is often unable to fully contact with sufficient air, resulting in incomplete combustion of the gas, which not only causes gas waste, but also increases safety hazards during use.

[0028] Optionally, in some embodiments, the gas inlet pipe 3 and the gas jet hole 41 are located at the same horizontal plane, and the gas is transported to the gas jet hole 41 through the gas inlet pipe 3, and then sprayed toward the burner air inlet 52 through the gas jet hole 41. At the same time, external air enters the burner air inlet 52 through the air inlet gap 6, thereby ensuring sufficient contact between the gas and air.

[0029] Furthermore, as a preferred embodiment of the present invention but not a limitation, the gas inlet pipe 3 is arranged in a horizontal direction, and the mounting base 2 is also provided with a gas outlet pipe 4 arranged in a vertical direction and communicating with the gas inlet pipe 3, and the gas jet hole 41 is located on the side of the gas outlet pipe 4 close to the burner air inlet 52.

[0030] Specifically, in the process of the gas jet hole 41 spraying gas to the burner air inlet 52, the air flow generated by the gas injection will form a certain pressure gradient. Due to the high gas injection speed, a high-pressure area is formed around the air inlet gap 6, ensuring that the gas can smoothly enter the burner air inlet 52 and the gas will not leak into the external environment through the air inlet gap 6; secondly, by controlling the distance between the gas jet hole 41 and the burner air inlet 52, within a certain range, it can effectively ensure that external air enters the burner air inlet 52 through the air inlet gap 6, and prevent gas leakage from occurring; finally, in the process of burning gas, the burner assembly 5 forms a negative pressure area. The negative pressure effect increases the amount of air entering from the air inlet gap 6, and at the same time, it also enhances the effect of preventing gas leakage.

[0031] like Figures 1 to 6 The mounting base 2 shown is provided with a gas outlet pipe 4 arranged in the direction of the burner air inlet 52, the gas jet hole 41 is located on the gas outlet pipe 4, and the burner air inlet pipe 51 and the gas outlet pipe 4 are suspended in the air;

[0032] Furthermore, the gas outlet pipe 4 is arranged toward the burner air inlet 52 , which helps to ensure that the gas can be directly and efficiently sprayed toward the burner air inlet 52 , effectively reducing the loss and interference of the gas during the transmission process.

[0033] Furthermore, the suspended arrangement between the burner air inlet pipe 51 and the gas outlet pipe 4 is beneficial to increasing the contact area between the gas and the external air, so that the gas and air are mixed more fully, which is beneficial to improving the combustion efficiency.

[0034] Furthermore, the gas outlet pipe 4 and the gas inlet pipe 3 are vertically connected. The vertical connection setting is conducive to reducing the space occupied by the equipment, so that the overall structure of the installation base 2 is more compact; secondly, the vertically connected pipeline layout helps to reduce the resistance and vortex of the gas in the pipeline, thereby improving the circulation efficiency of the gas, so that the gas can be more smoothly transmitted to the gas injection hole 41 through the gas inlet pipe 3.

[0035] like Figures 1 to 6 The burner body 1 shown is provided with a mounting base 7 for mounting the burner assembly 5, and a connecting assembly 71 is provided between the mounting base 7 and the mounting base 2;

[0036] Furthermore, the arrangement of the mounting base 7 can provide a stable mounting platform for the burner assembly 5, which helps to ensure that the burner assembly 5 does not shake or move during operation.

[0037] Optionally, in some embodiments, the burner assembly 5 and the mounting base 7 may be connected by snap-fit ​​connection, slot connection, or the like.

[0038] Furthermore, as a preferred embodiment of the present invention but not a limitation, the burner assembly 5 and the mounting base 7 are connected by threaded connection.

[0039] Furthermore, the connection assembly 71 is provided so that the mounting base 7 and the mounting base 2 can be firmly fixed together, effectively reducing the vibration and displacement of the burner assembly 5 during operation, thereby ensuring the stability of the burner body 1 during long-term use.

[0040] Optionally, the connection between the mounting base 7 and the mounting base 2 may be achieved by threaded connection, snap connection, slot connection, or the like.

[0041] like Figures 1 to 6 The burner assemblies 5 shown are arranged at intervals along the circumferential direction of the mounting base 7, and the burner air inlet pipes 51 and the gas outlet pipes 4 are arranged correspondingly;

[0042] Optionally, the number of burner assemblies 5 can be several, such as 2, 3, 4, etc. The burner assemblies 5 are arranged at intervals along the circumferential direction of the mounting base 7, which is conducive to ensuring uniform heat distribution, helping to improve the heating effect, and at the same time, effectively avoiding overheating of the center or overcooling of the edge.

[0043] Optionally, in some embodiments, there are several burner assemblies 5, and the number of burner air inlet pipe 51 and gas outlet pipe 4 is one. Gas is sprayed to the burner air inlet pipe 51 through one gas outlet pipe 4, and one burner air inlet pipe 51 provides gas combustion to several burner assemblies 5 at the same time.

[0044] Furthermore, as a preferred embodiment of the present invention but not a limitation, the number of burner assemblies 5 is the same as the number of burner air inlet pipes 51 and gas outlet pipes 4. One gas outlet pipe 4 corresponds to one burner air inlet pipe 51 and one burner assembly 5, which helps to ensure that each burner 53 can obtain a sufficient and stable gas and air mixture, helps to optimize the combustion efficiency, so that the gas can be fully burned, reduce gas emissions from incomplete combustion of the gas, and effectively improve thermal efficiency.

[0045] Specifically, there are three burner assemblies 5, three burner air inlet pipes 51 and three gas outlet pipes 4. The cross-section of the mounting base 2 is "Y"-shaped, the cross-section of the mounting base 7 is circular, and the three gas outlet pipes 4 are respectively located on the three sides of the mounting base 2. The three burner assemblies 5 and the burner air inlet pipes 51 are respectively arranged corresponding to the three gas outlet pipes 4.

[0046] like Figures 1 to 6 The connecting assembly 71 shown includes a first connecting post 711 and a second connecting post 712. One end of the first connecting post 711 is located in the middle of the mounting base 7, and the other end of the first connecting post 711 is located in the middle of the mounting base 2. The second connecting posts 712 are spaced apart along the circumference of the mounting base 7.

[0047] Furthermore, the first connecting column 711 serves as a central support, effectively connecting the mounting base 7 with the mounting base 2, which is beneficial to enhancing the stability of the entire structure. The second connecting columns 712 are arranged at intervals along the circumferential direction, providing additional support points for the connection between the mounting base 7 and the mounting base 2, further enhancing the stability of the structure.

[0048] Furthermore, the first connecting column 711 provides support in the center, while the second connecting column 712 is distributed along the circumference, which can evenly disperse the force between the mounting base 7 and the mounting base 2, thereby avoiding local stress concentration, helping to reduce the risk of material fatigue and damage, and thus extending the service life of the equipment.

[0049] Optionally, one end of the first connecting column 711 is connected to the slot of the mounting base 2, and the other end of the first connecting column 711 is threadedly connected to the mounting base 7, one end of the second connecting column 712 is connected to the slot of the mounting base 2, and the other end of the second connecting column 712 is plugged into the mounting base 7. The detachable connection is set so that the mounting base 7 and the mounting base 2 can be easily docked and separated, which is conducive to simplifying the installation and disassembly process, does not require complicated tools or too many operating steps, and is convenient for quick replacement or maintenance.

[0050] like Figures 1 to 6 The gas outlet pipe 4 and the burner air inlet pipe 51 are coaxially arranged, and the size of the burner air inlet 52 is larger than the size of the gas injection hole 41;

[0051] Furthermore, the gas outlet pipe 4 and the burner inlet pipe 51 are coaxially arranged, which helps to ensure that the flow path of the gas from the gas outlet pipe 4 to the burner inlet pipe 51 is more direct and smooth, and helps to reduce the resistance and eddy current of the gas during transmission.

[0052] Furthermore, the size of the burner air inlet 52 is larger than the size of the gas jet hole 41, so that the gas is fully expanded and mixed when entering the burner air inlet pipe 51 through the burner air inlet 52. The expanded gas can be better mixed with the air to form a uniform gas-air mixture, thereby improving combustion efficiency.

[0053] like Figures 1 to 6 The outer wall of the burner air inlet pipe 51 is provided with a thread 511 threadedly connected to the mounting base 7, so that the burner assembly 5 is mounted on the mounting base 7;

[0054] Furthermore, the threaded connection is provided so that the burner air inlet pipe 51 can be easily fixed to the mounting base 7 without the need for additional fasteners or tools, thereby making the installation process simpler and faster, and effectively reducing the installation difficulty and cost.

[0055] Furthermore, the threaded connection has excellent stability and reliability, which can ensure that the burner air inlet pipe 51 is firmly fixed on the mounting base 7, helping to prevent the burner air inlet pipe 51 from loosening or falling off during operation, thereby ensuring the continuity and safety of the combustion process.

[0056] Furthermore, the threaded connection makes it relatively easy to disassemble the burner air inlet pipe 51 from the mounting base 7. When the user needs to maintain, replace or clean the burner air inlet pipe 51, it can be easily removed from the mounting base 7 without destroying the connection structure, which helps to extend the service life of the equipment and reduce maintenance costs.

[0057] like Figures 1 to 6The burner assembly 5 shown further includes a burner 53 in communication with the burner air inlet pipe 51 , the burner 53 including a combustion chamber 531 with an upward opening, a combustion spacer 532 located on the combustion chamber 531 , and a plurality of combustion holes 533 provided on the combustion spacer 532 ;

[0058] Furthermore, the combustion chamber 531 opens upward, and the combustion hole 533 on the combustion partition 532 is conducive to limiting the outlet position of the flame, effectively preventing the flame from overflowing or irregular combustion, and helping to improve the safety of the equipment.

[0059] Furthermore, the combustion partition 532 serves as a partition structure within the combustion chamber 531, which can stabilize the flame shape and prevent the flame from fluctuating violently or going out during the combustion process. The provision of multiple combustion holes 533 also helps to adjust the flame size and stability, effectively ensuring the smooth progress of the combustion process.

[0060] Optionally, in some embodiments, the burner 53 and the burner air inlet pipe 51 may be connected by a snap connection, a slot connection, or the like.

[0061] Furthermore, as a preferred embodiment of the present invention but not a limitation, the burner 53 and the burner air inlet pipe 51 are connected by threaded connection.

[0062] like Figures 1 to 6 The burner air inlet pipe 51 shown is threadedly connected to the burner 53 on the side away from the gas injection hole 41;

[0063] Furthermore, the threaded connection is provided so that the burner air inlet pipe 51 can be easily fixed to the burner 53 without the need for additional fasteners or tools, thereby making the installation process simpler and faster, and effectively reducing the installation difficulty and cost.

[0064] Furthermore, the threaded connection has excellent stability and reliability, which can ensure a firm and stable connection between the burner air inlet pipe 51 and the burner 53, and help prevent the burner 53 from loosening or falling off during operation, thereby ensuring the continuity and safety of the combustion process.

[0065] Furthermore, the threaded connection makes it relatively easy to disassemble the burner 53 from the burner air inlet pipe 51. When the user needs to maintain, replace or clean the burner 53, it can be easily removed from the burner air inlet pipe 51 without destroying the connection structure, which helps to extend the service life of the equipment and reduce maintenance costs.

[0066] like Figures 1 to 6 The bottom of the mounting base 2 is provided with a support column 21 arranged in a vertical direction, and a reinforcing rib 22 is provided between the mounting base 2 and the support column 21;

[0067] Furthermore, the support column 21 is arranged in the vertical direction, which can effectively improve the vertical stability of the mounting base 2. The setting of the reinforcing rib 22 is conducive to strengthening the connection between the support column 21 and the mounting base 2, which helps to improve the stability of the overall structure and effectively prevent the equipment from shaking or deformation due to vibration or external force during use.

[0068] Furthermore, by providing the support columns 21 and the reinforcing ribs 22 , the load-bearing capacity of the mounting base 2 can be significantly improved.

[0069] Furthermore, the provision of the reinforcing ribs 22 helps to distribute the stress more evenly throughout the entire mounting base 2 and the support column 21 , thereby reducing local stress concentration and effectively improving the overall stability and durability of the structure.

[0070] Optionally, the reinforcing ribs 22 are arranged at intervals along the circumference of the support column 21 , which is conducive to forming a continuous support structure, thereby significantly improving the structural stability of the entire mounting base 2 and the support column 21 .

[0071] The implementation of this embodiment is as follows:

[0072] A suspended air inlet burner combustion device comprises a burner body 1, a mounting base 2 connected to the burner body 1, a gas inlet pipe 3, a gas outlet pipe 4 connected to the gas inlet pipe 3, and a gas jet hole 41 located on the gas outlet pipe 4, a burner assembly 5 is provided on the burner body 1, the burner assembly 5 comprises a burner inlet pipe 51, a burner inlet port 52 located on the burner inlet pipe 51, an air inlet gap 6 communicating with the outside is provided between the burner inlet port 52 and the gas jet hole 41, when the gas is transported to the gas jet hole 41 through the gas inlet pipe 3, the gas jet hole 41 passes through the gas inlet pipe 3. The burner air inlet 52 delivers gas to the burner air inlet pipe 51, thereby supplying the burner assembly 5 with gas for combustion. The provision of the air inlet gap 6 allows external air to smoothly pass through the burner air inlet 52 and enter the burner air inlet pipe 41, thereby ensuring sufficient contact between the gas and air, thereby ensuring sufficient combustion of the gas. This effectively solves the problem that existing burners require gas and air to be mixed for sufficient combustion during operation. However, due to the airtightness of gas stoves, the gas often cannot fully contact with sufficient air, resulting in incomplete combustion of the gas, which not only wastes gas but also increases safety hazards during use. The burner assembly 5 also includes a burner 53 connected to the burner air inlet pipe 51. The number of burners 53, the burner air inlet pipe 51, and the gas outlet pipe 4 are the same. One gas outlet pipe 4 corresponds to one burner air inlet pipe 51 and one burner 53. This helps ensure that each burner 53 receives a sufficient and stable gas and air mixture, helps optimize combustion efficiency, ensures sufficient combustion of the gas, reduces gas emissions from incomplete combustion, and effectively improves thermal efficiency.

[0073] The above examples are merely used to further illustrate the technical content of the present invention for easier understanding by the reader. However, they do not limit the implementation of the present invention to these examples. Any technical extension or reinvention based on the present invention is protected by the present invention. The scope of protection of the present invention shall be determined by the claims.

Claims

1. A suspended air-inlet burner combustion device, comprising a burner body (1) and a mounting base (2) connected to the burner body (1), characterized in that: The mounting base (2) is provided with a gas inlet pipe (3) and a gas jet hole (41) communicating with the gas inlet pipe (3); the burner body (1) is provided with a burner assembly (5); the burner assembly (5) comprises a burner inlet pipe (51), a burner inlet port (52) located on a side of the burner inlet pipe (51) close to the gas jet hole (41); and an air inlet gap (6) communicating with the outside is provided between the burner inlet port (52) and the gas jet hole (41).

2. The burner head combustion device with suspended air inlet according to claim 1, characterized in that: A gas outlet pipe (4) is provided on the mounting base (2) and is arranged in the direction of the burner air inlet (52). The gas jet hole (41) is located on the gas outlet pipe (4). The burner air inlet pipe (51) and the gas outlet pipe (4) are suspended in the air.

3. The burner head combustion device with suspended air inlet according to claim 2, characterized in that: The burner body (1) is provided with a mounting base (7) for mounting the burner assembly (5), and a connecting assembly (71) is provided between the mounting base (7) and the mounting base (2).

4. The burner head combustion device with suspended air inlet according to claim 3, characterized in that: The burner assemblies (5) are arranged at intervals along the circumferential direction of the mounting base (7), and the burner air inlet pipe (51) and the gas outlet pipe (4) are arranged correspondingly.

5. The burner head combustion device with suspended air inlet according to claim 3, characterized in that: The connecting assembly (71) comprises a first connecting column (711) and a second connecting column (712), wherein one end of the first connecting column (711) is located in the middle of the mounting base (7), the other end of the first connecting column (711) is located in the middle of the mounting base (2), and the second connecting columns (712) are arranged at intervals along the circumferential direction of the mounting base (7).

6. The burner head combustion device with suspended air inlet according to claim 2, characterized in that: The gas outlet pipe (4) and the burner air inlet pipe (51) are coaxially arranged, and the size of the burner air inlet (52) is larger than the size of the gas injection hole (41).

7. The burner head combustion device with suspended air inlet according to claim 3, characterized in that: The outer wall of the burner air inlet pipe (51) is provided with a thread (511) threadedly connected to the mounting base (7), so that the burner assembly (5) is mounted on the mounting base (7).

8. The burner head combustion device with suspended air inlet according to claim 2, characterized in that: The burner assembly (5) further comprises a burner (53) in communication with the burner air inlet pipe (51), the burner (53) comprising a combustion chamber (531) with an upward opening, and a combustion spacer (532) located on the combustion chamber (531), wherein the combustion spacer (532) is provided with a plurality of combustion holes (533).

9. The burner head combustion device with suspended air inlet according to claim 8, characterized in that: The burner air inlet pipe (51) is threadedly connected to the burner (53) at a side away from the gas injection hole (41).

10. The burner head combustion device with suspended air inlet according to claim 1, characterized in that: A support column (21) arranged in a vertical direction is provided at the bottom of the mounting base (2), and a reinforcing rib (22) is provided between the mounting base (2) and the support column (21).

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