Discharge lamp tungsten rod electrode radiating fin mounting structure

Abstract

The utility model discloses a tungsten rod electrode radiating fin mounting structure of a discharge lamp. Comprising a tungsten rod electrode body and at least two cooling fins, 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. The discharge lamp tungsten rod electrode heat dissipation fin installation structure solves the technical problems that a plurality of heat dissipation grooves are evenly formed in a tungsten rod electrode in an existing discharge lamp, the heat dissipation effect of the increased surface area is poor, 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.

Description

Technical Field

[0001] This application relates to the field of tungsten rod electrode technology, specifically to the heat sink fin mounting structure of tungsten rod electrode for discharge lamps. 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 with metallic tungsten (melting point as high as 3422℃) as the main component and rare earth oxides (such as cerium oxide, lanthanum oxide, etc.) added.

[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 peening the outer peripheral surface of the anode with aluminum oxide, 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 tungsten rod electrode heat sink mounting structure for a discharge lamp, so as to solve the problems mentioned in the background art.

[0007] The technical solution adopted by this application to solve its technical problem is: a tungsten rod electrode heat sink fin mounting structure for a discharge lamp, including a tungsten rod electrode body and at least two heat sink fins, wherein 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 an external threaded portion, and the heat dissipation fins are provided with a connecting hole. The connecting hole is provided with an internal threaded portion that matches the external threaded portion. The internal threaded portions of the heat dissipation fins are all threadedly connected to the external threaded portions. A gap is left between two adjacent heat dissipation fins on the tungsten rod electrode body.

[0009] Further, the part between the front end and the outer threaded part of the rear end of the tungsten rod electrode body is a main body part, and the inner diameter of the connecting hole of the heat dissipation fin is consistent with the outer diameter of the main body part.

[0010] Further, the heat dissipation fin is welded with the outer threaded part of the rear end of the tungsten rod electrode body.

[0011] Further, the heat dissipation fin is welded with the outer threaded part by using molybdenum material through fusion welding technology.

[0012] Further, the heat dissipation fins are distributed on the tungsten rod electrode body at equal intervals.

[0013] Further, the rear end of the tungsten rod electrode body is a supporting end, and the supporting end is connected with a supporting rod.

[0014] The beneficial effects of the present application are: the discharge lamp tungsten rod electrode heat dissipation fin mounting structure provided by the present application is formed by turning the outer periphery of the tungsten rod electrode body to form an outer threaded part. On the one hand, the groove structure formed by the outer threaded part can increase the heat dissipation effect, and at the same time, the rear end is set away from the working end, which can reduce the high temperature influence of the working end on the rear welding point, increase the stability of the heat dissipation fin welded thereon, and improve the service life. On the other hand, the heat dissipation fin can be fixed to the tungsten rod electrode body through threaded connection, which increases the surface area of the tungsten rod electrode body for heat dissipation, and also enables the number of heat dissipation fins and the distance between adjacent heat dissipation fins to be flexibly adjusted, quickly installed on the tungsten rod electrode body, and welded. The whole process is simple and convenient, and is suitable for tungsten rod electrode bodies of various diameters. Compared with the traditional cutting and slotting method, the processing difficulty is lower.

[0015] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings accompanying the specification of the present application form a part thereof, and serve to provide further understanding of the present application, the illustrative embodiments of the present application and its description serve to explain the present application, and do not constitute an improper limitation on the present application.

[0017] In the drawings:

[0018] Figure 1 is the overall schematic diagram of the present application;

[0019] Figure 2 is the cross-sectional schematic diagram of the tungsten rod electrode of the present application;

[0020] Figure 3 is the schematic diagram of the tungsten rod electrode body of the present application;

[0021] Figure 4 Fig. 1 is a schematic view of a heat dissipation fin of the present application;

[0022] In the drawings, reference numerals:

[0023] 1. discharge lamp; 2. heat dissipation fin; 21. connecting hole; 22. internal thread part; 3. tungsten rod electrode body; 31. working end; 32. main body part; 33. external thread part; 34. supporting end; 4. cathode; 5. supporting rod. DETAILED DESCRIPTION

[0024] It should be noted that the embodiments and features in the present application can be combined with each other without conflict. The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0025] In order 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 described in detail below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0026] As Figures 1-4 shown, the present application provides a technical solution: a discharge lamp tungsten rod electrode heat dissipation fin mounting structure, comprising a tungsten rod electrode body 3 and at least two heat dissipation fins 2, the front end of the tungsten rod electrode body 3 is a working end 31, the working end 31 is used for being arranged opposite to the cathode 4 of the discharge lamp 1, the rear end of the tungsten rod electrode body 3 is used for being connected with the supporting rod 5;

[0027] The rear end of the tungsten rod electrode body 3 is provided with an external thread part 33, the heat dissipation fin 2 penetrates the connecting hole 21, the connecting hole 21 is provided with an internal thread part 22 matched with the external thread part 33, the internal thread part 22 of the heat dissipation fin 2 is in threaded connection with the external thread part 33, and a gap is left between the adjacent two heat dissipation fins 2 on the tungsten rod electrode body 3.

[0028] The part between the front end of the tungsten rod electrode body 3 and the external thread part 33 of the last end is a main body part 32, and the inner diameter of the connecting hole 21 of the heat dissipation fin 2 is consistent with the outer peripheral diameter of the main body part 32.

[0029] The heat dissipation fin 2 and the external thread part 33 of the rear end of the tungsten rod electrode body 3 are welded.

[0030] The heat dissipation fin 2 and the external thread part 33 are welded and fixed, and the molybdenum material is welded by using the fusion welding technology.

[0031] The heat dissipation fins 2 are distributed equidistantly on the tungsten rod electrode body 3.

[0032] The rear end of the tungsten rod electrode body 3 is a supporting end 34, which is connected with the supporting rod 5.

[0033] In one embodiment, the working principle of the structure is as follows:

[0034] Specifically, the tungsten rod electrode body 3 is installed on a lathe, the rear end of the tungsten rod electrode body 3 is turned to form an external thread part 33 away from the working end 31, so that the ambient temperature is low, the heat dissipation fins 2 with the hole diameter of the connecting hole 21 consistent with the outer diameter of the body part 32 are selected, the internal thread part 22 of the heat dissipation fin 2 is matched with the external thread part 33, the heat dissipation fin 2 is rotated to the front end of the external thread part 33, then the molybdenum material is welded and fixed by using the melting welding technology, and the heat dissipation fins 2 are sequentially installed from front to back according to the above steps, and welded and fixed, which can be quickly positioned at the predetermined position.

[0035] In summary, by turning the outer periphery of the tungsten rod electrode body 3 to form the external thread part 33, on the one hand, the groove structure formed by the external thread part 33 can increase the heat dissipation effect, and at the same time, the rear end is arranged away from the working end 31, which can reduce the high temperature influence of the working end 31 on the welding points behind it, increase the stability of the heat dissipation fins 2 welded thereon, and improve the service life; on the other hand, the heat dissipation fins 2 can be fixed to the tungsten rod electrode body 3 through threaded connection, which increases the surface area of the tungsten rod electrode body 3, and also enables the number of heat dissipation fins 2 and the distance between adjacent heat dissipation fins 2 to be flexibly adjusted, quickly installed on the tungsten rod electrode body 3, and welded, the whole process is simple and convenient, and suitable for tungsten rod electrode bodies 3 of various diameters, compared with the traditional cutting and grooving method, the processing difficulty is relatively low; and the technical problems that the existing discharge lamp tungsten rod electrode is evenly arranged with a plurality of heat dissipation grooves, the increased surface area has poor heat dissipation effect, the heat dissipation grooves cannot reach the deep and fine process if the machining method is used, and the efficiency is very low if the laser is used for grooving are solved.

[0036] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tungsten rod electrode heat sink mounting structure for a discharge lamp, characterized in that: It includes a tungsten rod electrode body (3) and at least two heat dissipation fins (2). The front end of the tungsten rod electrode body (3) is a working end (31), which is used to be arranged opposite to the cathode (4) of the discharge lamp (1). The rear end of the tungsten rod electrode body (3) is used to connect with a support rod (5). The tungsten rod electrode body (3) has an external threaded portion (33) at its rear end. The heat dissipation fins (2) have a connecting hole (21) through them. The connecting hole (21) has an internal threaded portion (22) that matches the external threaded portion (33). The internal threaded portions (22) of the heat dissipation fins (2) are all threadedly connected to the external threaded portions (33). There is a gap between two adjacent heat dissipation fins (2) on the tungsten rod electrode body (3).

2. The tungsten rod electrode heat sink mounting structure for a discharge lamp according to claim 1, characterized in that: The part between the external threaded portion (33) at the front end and the rear end of the tungsten rod electrode body (3) is the main body portion (32), and the inner diameter of the connecting hole (21) of the heat dissipation fin (2) is consistent with the outer circumferential diameter of the main body portion (32).

3. The tungsten rod electrode heat sink mounting structure for discharge lamps according to claim 2, characterized in that: The heat dissipation fins (2) are welded to the external threaded portion (33) at the rear end of the tungsten rod electrode body (3).

4. The tungsten rod electrode heat sink mounting structure for a discharge lamp according to claim 3, characterized in that: The heat dissipation fins (2) and the external threaded portion (33) are welded together using molybdenum material and a fusion welding technique.

5. The tungsten rod electrode heat sink mounting structure for a discharge lamp according to claim 1, characterized in that: The heat dissipation fins (2) are distributed at equal intervals on the tungsten rod electrode body (3).

6. The tungsten rod electrode heat sink mounting structure for a discharge lamp according to claim 1, characterized in that: The rear end of the tungsten rod electrode body (3) is a support end (34), which is connected to the support rod (5).

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