Stepped tungsten rod electrode of discharge lamp and discharge lamp

Abstract

The utility model discloses a stepped tungsten rod electrode of a discharge lamp and the discharge lamp. Comprising a tungsten rod electrode body, the front end of the tungsten rod electrode body is a working end, the working end is used for being arranged opposite to a cathode of a discharge lamp, and the rear end of the tungsten rod electrode body is used for being connected with a supporting rod. According to the stepped tungsten rod electrode of the discharge lamp and the discharge lamp, the technical problems that the heat dissipation effect of the increased surface area is poor due to the fact that a plurality of heat dissipation grooves are evenly formed in the tungsten rod electrode in an existing discharge lamp, if a metal machining mode is adopted, the heat dissipation grooves cannot achieve the deep and thin technology, and if laser is used for grooving, the efficiency is very low are solved.

Description

Technical Field

[0001] This application relates to the field of tungsten rod electrode technology, specifically a stepped tungsten rod electrode for a discharge lamp and the discharge lamp itself. Background Technology

[0002] Tungsten rod electrodes are a high-performance metallic material widely used in industrial fields, especially playing a key role in welding technology. Tungsten rod electrodes are electrode materials made by adding rare earth oxides (such as cerium oxide, lanthanum oxide, etc.) as the main component of metallic tungsten (melting point as high as 3422°C).

[0003] An existing patent (publication number: CN102376523A) discloses a discharge lamp. This invention provides a discharge lamp that prevents the discharge capacitor from blackening without complicated processing steps. It achieves this by shot blasting aluminum oxide onto the outer peripheral surface of the anode, causing the aluminum oxide to adhere to the outer surface in a dispersed state. Then, the anode is vacuum-heated below the melting point of the aluminum oxide to remove impurity gases. When the lamp is turned on, as the temperature of the anode rises, the aluminum oxide melts and evaporates, and the evaporated aluminum oxide adheres to the inner surface of the light-emitting tube.

[0004] The existing discharge lamp has a tungsten rod electrode with several heat dissipation grooves evenly arranged on it. The increased surface area does not result in good heat dissipation. If gold processing is used, the heat dissipation grooves cannot be deep and fine. If laser is used to make grooves, the efficiency will be very low.

[0005] Therefore, it is necessary to provide a tungsten rod electrode heat sink ring mounting structure to solve the above problems. Summary of the Invention

[0006] In view of the above-mentioned problems in the prior art, the purpose of this application is to provide a stepped tungsten rod electrode for a discharge lamp and a discharge lamp to solve the problems mentioned in the background art.

[0007] The technical solution adopted by this application to solve its technical problem is: a stepped tungsten rod electrode of a discharge lamp and a discharge lamp, including a tungsten rod electrode body, the front end of the tungsten rod electrode body is a working end, the working end is used to be arranged opposite to the cathode of the discharge lamp, and the rear end of the tungsten rod electrode body is used to connect with a support rod.

[0008] The rear end of the tungsten rod electrode body is provided with a stepped structure. The stepped structure has at least two shafts connected sequentially in the front-rear direction. The cross-sectional area of ​​the front shaft is larger than the cross-sectional area of ​​the rear shaft in two adjacent shafts. The connecting surface between two adjacent shafts forms a stepped surface.

[0009] At least one of the stepped surfaces is provided with a heat dissipation ring, the stepped surface and the front end face of the corresponding heat dissipation ring are in contact, the heat dissipation ring is sleeved on the shaft portion on the rear side of the corresponding stepped surface, and the heat dissipation ring is welded and fixed to the shaft portion.

[0010] Furthermore, each of the stepped surfaces is provided with a corresponding heat dissipation ring.

[0011] Furthermore, the portion between the front end and the rear end of the tungsten rod electrode body is the main body, and the connecting surface between the rear end of the shaft and the main body forms a stepped surface.

[0012] The outer periphery of the stepped surface between the rearmost shaft portion and the main body portion is connected to the main body portion, and the inner periphery of the stepped surface between the rearmost shaft portion and the main body portion is connected to the rearmost shaft portion.

[0013] Furthermore, the cross-section of the shaft portion is circular, and each shaft portion is coaxially arranged with respect to the others.

[0014] Furthermore, the inner wall of the heat dissipation ring forms an inner hole, and the inner hole of the heat dissipation ring matches the shaft portion where it is located.

[0015] Furthermore, the inner diameter of the heat dissipation ring's inner hole is equal to the outer diameter of the shaft portion to which it is located.

[0016] Furthermore, a support end is connected to the rear of the shaft at the very end, and the support end is connected to the support rod.

[0017] Furthermore, the heat dissipation ring is welded to the shaft using molybdenum material and a fusion welding technique.

[0018] Furthermore, a discharge lamp includes the stepped tungsten rod electrode of the discharge lamp described above.

[0019] The beneficial effects of this application are as follows: The stepped tungsten rod electrode and discharge lamp provided by this application increase the heat dissipation effect of the tungsten rod electrode surface by adopting the method of installing heat dissipation rings. The interaction between the shaft and the stepped surface of the stepped structure allows each heat dissipation ring to be quickly positioned in a predetermined position, which facilitates subsequent welding operations. This results in better positional accuracy and stability of the heat dissipation rings after welding. Moreover, the heat dissipation rings, after being limited by the shaft and the stepped surface, can only move backward, that is, there is only one free end. Therefore, the stability of the heat dissipation ring installation can be greatly improved, avoiding easy loosening due to thermal expansion and contraction or vibration during use, and further improving service life. In addition, each heat dissipation ring is located at the rear end of the tungsten rod electrode body, away from the working end of high-temperature operation, thereby keeping the temperature low and preventing the solder joint from melting under high temperature for a long time.

[0020] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 This is an overall schematic diagram of the present application;

[0023] Figure 2 This is a schematic cross-sectional view of the tungsten rod electrode body of this application;

[0024] Figure 3 For the purposes of this application Figure 2 Enlarged diagram of area A in the middle;

[0025] Figure 4 This is a schematic diagram of the tungsten rod electrode body of this application;

[0026] Figure 5 This is a schematic diagram of the heat dissipation ring of this application;

[0027] The following are the labeling elements in the figure:

[0028] 1. Discharge lamp; 2. Heat dissipation ring; 21. Inner hole; 3. Tungsten rod electrode body; 31. Working end; 32. Main body; 33. Shaft; 331. Stepped surface; 34. Support end; 4. Cathode; 5. Support rod. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0031] like Figure 1-5As shown, this application provides a technical solution: a stepped tungsten rod electrode for a discharge lamp and a discharge lamp, including a tungsten rod electrode body 3, the front end of the tungsten rod electrode body 3 being a working end 31, the working end 31 being arranged opposite to the cathode 4 of the discharge lamp 1, and the rear end of the tungsten rod electrode body 3 being connected to a support rod 5.

[0032] The rear end of the tungsten rod electrode body 3 is provided with a stepped structure. The stepped structure has at least two shaft portions 33 connected sequentially in the front-rear direction. The cross-sectional area of ​​the front shaft portion 33 of the two adjacent shaft portions 33 is larger than the cross-sectional area of ​​the rear shaft portion 33. The connecting surface between the two adjacent shaft portions 33 forms a stepped surface 331.

[0033] At least one stepped surface 331 is provided with a heat dissipation ring 2. The stepped surface 331 and the front end face of the corresponding heat dissipation ring 2 are in contact. The heat dissipation ring 2 is sleeved on the shaft portion 33 on the rear side of the corresponding stepped surface 331, and the heat dissipation ring 2 is welded and fixed to the shaft portion 33.

[0034] Each step surface 331 is provided with a corresponding heat dissipation ring 2.

[0035] The portion between the front end and the rear end of the tungsten rod electrode body 3 is the main body 32, and the connecting surface between the rear end shaft portion 33 and the main body 32 forms a stepped surface 331.

[0036] The outer periphery of the step surface 331 between the rearmost shaft portion 33 and the main body portion 32 is connected to the main body portion 32, and the inner periphery of the step surface 331 between the rearmost shaft portion 33 and the main body portion 32 is connected to the rearmost shaft portion 33.

[0037] The cross-section of the shaft portion 33 is circular, and each shaft portion 33 is coaxially arranged with respect to the others.

[0038] The inner ring wall of the heat dissipation ring 2 forms an inner hole 21, and the inner hole 21 of the heat dissipation ring 2 matches the shaft portion 33 where it is located.

[0039] The inner diameter of the inner hole 21 of the heat dissipation ring 2 is equal to the outer diameter of the shaft portion 33 where it is located.

[0040] A support end 34 is connected to the rear of the shaft portion 33 at the very end, and the support end 34 is connected to the support rod 5.

[0041] The heat dissipation ring 2 is welded and fixed to the shaft 33 using molybdenum material and fusion welding technology.

[0042] In one embodiment, the structure works as follows:

[0043] Specifically, the tungsten rod electrode body 3 is mounted on a lathe, and the outer periphery of the rear end of the tungsten rod electrode body 3 is machined to form a stepped structure, which is far away from the working end 31, so that the ambient temperature is low. The stepped structure consists of at least two shaft portions 33 connected in sequence along the front-rear direction. The cross-sectional area of ​​the front shaft portion 33 of the two adjacent shaft portions 33 is larger than the cross-sectional area of ​​the rear shaft portion 33.

[0044] Select a heat dissipation ring 2 with an inner hole 21 that matches the outer diameter of each shaft part 33. First, put the heat dissipation ring 2 on the step surface 331 between the last shaft part 33 and the main body part 32. This allows for quick positioning in the predetermined position. Then, use molybdenum material to weld the ring using a fusion welding technique to fix the heat dissipation ring 2 on the step surface 331. Follow the above steps to install and weld the heat dissipation ring 2 on the shaft part 33 from front to back.

[0045] In summary, this device, by incorporating heat dissipation rings 2, increases the heat dissipation surface area of ​​the tungsten rod electrode body 3. The stepped shaft 33 and stepped surface 331 work together to allow each heat dissipation ring 2 to be quickly positioned in a predetermined location, facilitating subsequent welding operations. This results in better positional accuracy and stability of the heat dissipation rings 2 after welding. Furthermore, the heat dissipation rings 2, after being limited by the shaft 33 and stepped surface 331, can only move backward, meaning they have only one free end. This significantly improves the stability of the heat dissipation rings 2 installation, preventing them from easily loosening due to thermal expansion and contraction or vibration during use, thus further extending their service life. In addition, each heat dissipation ring 2 is located at the rear end of the tungsten rod electrode body 3, away from the high-temperature working end 31, thereby keeping the temperature low and preventing the weld joint from melting under prolonged high temperatures. This solves the technical problems of existing discharge lamps where the surface area of ​​the tungsten rod electrode, evenly arranged with several heat dissipation grooves, is not ideal for heat dissipation. Additionally, if metalworking is used, the heat dissipation grooves cannot achieve the required depth and fineness, and laser grooving would be inefficient.

[0046] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A stepped tungsten rod electrode for a discharge lamp, characterized by: It includes a tungsten rod electrode body (3), the front end of which is a working end (31), the working end (31) is used to be arranged opposite to the cathode (4) of the discharge lamp (1), and the rear end of which is used to connect with the support rod (5). The rear end of the tungsten rod electrode body (3) is provided with a stepped structure. The stepped structure has at least two shaft portions (33) connected sequentially in the front-rear direction. The cross-sectional area of ​​the front shaft portion (33) of the two adjacent shaft portions (33) is larger than the cross-sectional area of ​​the rear shaft portion (33). The connecting surface between the two adjacent shaft portions (33) forms a stepped surface (331). At least one of the stepped surfaces (331) is provided with a heat dissipation ring (2), the front end face of the stepped surface (331) and the corresponding heat dissipation ring (2) are in contact, the heat dissipation ring (2) is sleeved on the shaft portion (33) on the rear side of the corresponding stepped surface (331), and the heat dissipation ring (2) is welded and fixed to the shaft portion (33).

2. A stepped tungsten rod electrode for a discharge lamp as claimed in claim 1, characterized in that: Each of the stepped surfaces (331) is provided with a corresponding heat dissipation ring (2).

3. A stepped tungsten rod electrode for a discharge lamp as claimed in claim 2, characterized in that: The portion between the front end and the rear end of the tungsten rod electrode body (3) is the main body (32), and the connecting surface between the rear end of the shaft portion (33) and the main body (32) forms a stepped surface (331). The outer periphery of the step surface (331) between the last end shaft portion (33) and the main body portion (32) is connected to the main body portion (32), and the inner periphery of the step surface (331) between the last end shaft portion (33) and the main body portion (32) is connected to the last end shaft portion (33).

4. A stepped tungsten rod electrode for a discharge lamp as claimed in claim 3, characterized in that: The cross-section of the shaft portion (33) is circular, and each shaft portion (33) is coaxially arranged with each other.

5. The stepped tungsten electrode of a discharge lamp according to claim 1, characterized in that: The inner ring wall of the heat dissipation ring (2) forms an inner hole (21), and the inner hole (21) of the heat dissipation ring (2) matches the shaft portion (33) where it is located.

6. A stepped tungsten rod electrode for a discharge lamp as claimed in claim 5, characterized in that: The inner diameter of the inner hole (21) of the heat dissipation ring (2) is equal to the outer diameter of the shaft portion (33) where it is located.

7. The stepped tungsten electrode of a discharge lamp according to claim 1, characterized in that: The rear end of the shaft (33) is connected to a support end (34), which is connected to the support rod (5).

8. The stepped tungsten electrode of a discharge lamp of claim 1, characterized in that: The heat dissipation ring (2) is welded to the shaft (33) using molybdenum material and welding technology.

9. A discharge lamp characterized by: The stepped tungsten rod electrode includes the discharge lamp according to any one of claims 1-8.

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