A moisture-proof silica gel cap for a heating tube nozzle

Abstract

This utility model relates to the technical field of heating tubes and discloses a moisture-proof silicone cap for the opening of a heating tube. The cap includes a cap body with a cavity inside. The cavity is used to fit over the opening of the heating tube body. One end of the cavity is open, and the other end has a cold needle hole. A pressure ring is provided at the end of the cavity near the cold needle hole. The diameter of the pressure ring is smaller than the diameter of the cavity, and a bevel is provided on the inner wall edge of the pressure ring near the cavity. The moisture-proof silicone cap fits over the heating tube body through the cavity. Because the diameter of the pressure ring is smaller than the diameter of the cavity, it facilitates silicone filling. The bevel provides a larger contact area between the filled silicone and the end face of the heating tube body, resulting in a thicker cured silicone layer. This prevents voids at the opening of the heating tube body, improves sealing, and effectively enhances insulation and moisture-proof performance.

Description

Technical Field

[0001] This utility model relates to the technical field of heating tubes, and more specifically, to a moisture-proof silicone cap for the opening of a heating tube. Background Technology

[0002] Heating elements or heating coils typically have a silicone cap fitted over the cold pin (heating element lead-out rod or cold end lead-out piece), and then silicone is filled inside the silicone cap so that the end of the heating element is sealed after the silicone cures.

[0003] However, the interior of traditional silicone caps is usually a flat cavity. After the silicone cap is fitted onto the heating element port, the inner wall of the silicone cap will be in contact with the heating element port, without leaving a cavity for silicone filling. This results in a relatively small amount of silicone filling. After filling, it will be squeezed, causing the silicone to be unevenly distributed after curing, thin in thickness, and even have local unfilled areas leading to voids. This results in poor sealing of the heating element port, poor moisture resistance, and a relatively short service life. Utility Model Content

[0004] In order to overcome the defects of the existing technology, this utility model provides a moisture-proof silicone cap for the opening of a heating tube, so as to solve the problems in the existing technology.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a moisture-proof silicone cap for the opening of a heating tube, comprising a cap body, wherein a cavity is provided in the cap body, the cavity is used to fit onto the opening of the heating tube body, one end of the cavity is open, and the other end is provided with a cold needle hole, a pressure ring is provided at the end of the cavity near the cold needle hole, the diameter of the pressure ring is smaller than the diameter of the cavity, and the inner wall edge of the pressure ring near the cavity is provided with a beveled edge.

[0006] In the aforementioned moisture-proof silicone cap for the opening of a heating tube, the inclined flange is inclined from the inner wall of the pressure ring towards the inner wall of the tube cavity.

[0007] In the aforementioned moisture-proof silicone cap for the heating tube opening, the end face of the pressure ring near the tube cavity is provided with an abutting step, and the inclined flange is connected to the inner wall of the tube cavity through the abutting step.

[0008] In the aforementioned moisture-proof silicone cap for the heating tube opening, a cold needle is inserted into the heating tube body, and an insulating layer is filled between the cold needle and the inner wall of the heating tube body. The cold needle is inserted into the cold needle hole, and the abutting step abuts against the end face of the heating tube body, so that a silicone filling cavity is formed between the pressure ring and the inclined flange.

[0009] In the aforementioned moisture-proof silicone cap for the opening of a heating element, the silicone filling cavity covers the upper end of the heating element body and the insulating layer.

[0010] In the aforementioned moisture-proof silicone cap for the heating element inlet, the insulating layer is a magnesium oxide filling layer.

[0011] In the aforementioned moisture-proof silicone cap for the heating tube opening, the cap body and the pressure ring are an integral silicone structure.

[0012] The beneficial effects of this utility model are as follows: by fitting the cavity onto the heating tube body, the cold needle of the heating tube body is inserted into the cold needle hole, causing the pressure ring to press against the end face of the heating tube body. Since the diameter of the pressure ring is smaller than the diameter of the cavity, the position between the pressure rings will not contact the end of the heating tube body to form a cavity, thus facilitating the filling of silicone. Under the action of the beveled edge, the contact area between the filled silicone and the end face of the heating tube body is larger, resulting in more uniform and thicker silicone after curing. This prevents voids from appearing at the opening of the heating tube body, improves the sealing performance, and effectively enhances the insulation and moisture-proof performance. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the cap and heating tube body in this embodiment.

[0014] Figure 2 This is a schematic diagram of the internal structure of the cap and heating tube in this embodiment.

[0015] Figure 3 This is a schematic diagram of the internal structure of the cap body in this embodiment.

[0016] In the diagram: 1. Cap body; 2. Cold needle hole; 3. Tube cavity; 4. Pressure ring; 5. Beveled edge; 6. Abutment step; 7. Heating tube body; 8. Insulating layer; 9. Cold needle; 10. Silicone filling cavity. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0018] Combination Figures 1 to 3The illustration shows a moisture-proof silicone cap for the opening of a heating element, comprising a cap body 1, with a cavity 3 inside the cap body 1. The cavity 3 is used to fit over the opening of the heating element body 7. One end of the cavity 3 is open, and the other end has a cold needle hole 2. A pressure ring 4 is provided at the end of the cavity 3 near the cold needle hole 2. The diameter of the pressure ring 4 is smaller than the diameter of the cavity 3, and a beveled edge 5 is provided on the inner wall edge of the pressure ring 4 near the cavity 3. A cold needle 9 is inserted inside the heating element body 7, and an insulating layer 8 is filled between the cold needle 9 and the inner wall of the heating element body 7. The cold needle 9 is inserted into the cold needle hole 2. In this embodiment, the cavity 3 fits over the heating element body 7, allowing the heating element to... The cold needle of tube body 7 is inserted into the cold needle hole 2, so that the pressure ring 4 presses against the end face of the heating tube body 7. Since the diameter of the pressure ring 4 is smaller than the diameter of the tube cavity 3, the position between the pressure rings 4 will not contact the end of the heating tube body 7 to form a cavity, thus facilitating the filling of silicone. Under the action of the beveled edge 5, the contact area between the filled silicone and the end face of the heating tube body 7 is larger, so that the filled silicone is more uniform after curing and the thickness is thicker than the traditional filling silicone, thereby preventing the appearance of voids at the tube opening of the heating tube body 7, improving the sealing performance, effectively improving the insulation and moisture-proof performance, and extending the service life of the heating tube.

[0019] Specifically, in this embodiment, the inclined flange 5 is inclined from the inner wall of the pressure ring 4 towards the inner wall of the cavity 3, so that the diameter of the filled silicone is larger at the end near the heating tube body 7, and the contact area with the heating tube body 7 is increased.

[0020] In this embodiment, the end face of the pressure ring 4 near the cavity 3 is provided with an abutting step 6, and the inclined flange 5 is connected to the inner wall of the cavity 3 through the abutting step 6. This allows the filled silicone to contact the opening of the heating tube body 7 with a larger area, resulting in better silicone filling and preventing voids. Specifically, in this embodiment, the abutting step 6 abuts against the end face of the heating tube body 7, forming a silicone filling cavity 10 between the pressure ring 4 and the inclined flange 5. The width of the abutting step 6 is half the thickness of the heating tube body 7, so that after the silicone is filled into the silicone filling cavity 10, it can better cover the surface of the heating tube body 7.

[0021] Specifically, the silicone filling cavity 10 covers the upper end of the heating tube body 7 and the insulation layer 8; so that after the filling silicone cures, it prevents moisture from entering between the heating tube body 7 and the insulation layer 8, thereby improving the moisture-proof performance.

[0022] It is worth noting that in this embodiment, the insulating layer 8 is a magnesium oxide filling layer, and the cap 1 and the pressure ring 4 are an integral silicone structure.

[0023] In this embodiment, after the moisture-proof silicone cap is placed on the heating tube body 7, silicone is filled into the silicone filling cavity 10. After the silicone cures, it can effectively increase the amount of silicone at the tube opening during internal verification. The number of tests is 2500 pieces. After soaking in water for 3 hours, it is taken out and air-dried naturally. The insulation value DC500V is tested, and the test results are all >2000MΩ. After 45 days, the insulation value is retested and is all >1000MΩ.

[0024] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A moisture-proof silica gel cap for the mouth of a heat pipe, comprising a cap body (1), characterized in that, The cap body (1) is provided with a cavity (3), which is used to fit onto the opening of the heating tube body (7). One end of the cavity (3) is open, and the other end is provided with a cold needle hole (2). A pressure ring (4) is provided at the end of the cavity (3) near the cold needle hole (2). The diameter of the pressure ring (4) is smaller than the diameter of the cavity (3). The inner wall edge of the pressure ring (4) near the cavity (3) is provided with a beveled edge (5).

2. A moisture resistant silica cap for a heat pipe nozzle as claimed in claim 1, wherein, The inclined flange (5) is inclined from the inner wall of the pressure ring (4) toward the inner wall of the cavity (3).

3. A moisture resistant silica cap for a heat pipe nozzle as claimed in claim 2, wherein, The end face of the pressure ring (4) near the cavity (3) is provided with an abutting step (6), and the inclined flange (5) is connected to the inner wall of the cavity (3) through the abutting step (6).

4. A moisture-proof silicone cap for the opening of a heating element according to claim 3, characterized in that, A cold needle (9) is inserted inside the heating tube body (7). An insulating layer (8) is filled between the cold needle (9) and the inner wall of the heating tube body (7). The cold needle (9) is inserted into the cold needle hole (2). The abutting step (6) abuts against the end face of the heating tube body (7), so that a silicone filling cavity (10) is formed between the pressure ring (4) and the inclined edge (5).

5. A moisture resistant silica cap for a heat pipe nozzle as claimed in claim 4, wherein, The silicone filling cavity (10) covers the upper end of the heating tube body (7) and the insulating layer (8).

6. A moisture resistant silica cap for a heat pipe nozzle as claimed in claim 4, wherein, The insulating layer (8) is a magnesium oxide filling layer.

7. A moisture resistant silica cap for a heat pipe nozzle as claimed in claim 1, wherein, The cap body (1) and the pressure ring (4) are an integral silicone structure.

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