Electric heating tube sealing silica gel cap

Abstract

The utility model provides an electric heating tube sealing silica gel cap, which relates to the technical field of electric heating tube fittings, and comprises a sealing cap, the middle part of the sealing cap is provided with a penetrating hole, the lower side of the sealing cap is provided with an inserting groove, a sealing sleeve is arranged between the inserting groove and the penetrating hole, the outer side wall of the sealing sleeve is arranged to be an arc-shaped side wall, and the arc-shaped side wall is provided with a through hole. The inner wall of the sealing sleeve abuts against the terminal stud, an inner ring groove is formed in the inner wall of the sealing sleeve, a plurality of enclasping rings connected end to end from top to bottom are arranged in the inner ring groove, the outer edges of the enclasping rings are flush with the inner wall of the penetrating hole, and a plurality of displacement grooves are formed in the lower side face of each enclasping ring. According to the utility model, the electric heating tube and the terminal stud can be sealed through the deformation of the sealing sleeve, and the terminal stud is downwards extruded by the enclasping ring through the deformation quantity, so that the connection of the terminal stud is more stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric heating tube accessories, in particular to a sealing silica gel cap of electric heating tube. BACKGROUND

[0002] Electric heating tube is an electrical component that converts electrical energy into heat. It is mainly made of metal tube, with spiral-shaped electric heating alloy wire wound inside and filled with magnesium oxide powder with good insulation and heat conduction performance in the gap. The end of the electric heating tube is usually sealed with silica gel to ensure its simple structure, high mechanical strength, high thermal efficiency, safety and reliability, and long service life.

[0003] The electric heating tube terminal on the market is usually directly plugged into the end of the metal tube through the sealing cap, and the existing sealing cap is usually connected by mutual extrusion sealing through a simple groove. This groove sealing method has poor insulation sealing effect and poor holding effect on the terminal. Long-term use will cause the terminal to move outward and lose the sealing effect, which will cause the insulation material to be damp, affect the insulation resistance performance of the electric heating tube, and even cause the electric heating tube to leak. UTILITY MODEL CONTENT

[0004] (I) Technical problem solved

[0005] In view of the deficiencies of the prior art, the utility model provides a sealing silica gel cap of electric heating tube, which solves the problems raised in the above background technology.

[0006] (II) Technical scheme

[0007] To achieve the above purpose, the utility model realizes the following technical scheme:

[0008] A sealing silica gel cap of electric heating tube, comprising an electric heating tube and a terminal head, a sealing cap is installed between the electric heating tube and the terminal head, a through hole is formed in the middle of the sealing cap, the terminal head is plugged into the through hole, a plug-in groove is formed on the lower side of the sealing cap, the plug-in groove is sleeved on the end of the electric heating tube, a sealing sleeve is arranged between the plug-in groove and the through hole, the cross section of the sealing sleeve gradually decreases from top to bottom, the outer side wall of the sealing sleeve is arranged as an arc-shaped side wall, the inner wall of the sealing sleeve coincides with the through hole, the electric heating tube is in sliding contact with the arc-shaped side wall of the sealing sleeve, and the inner wall of the sealing sleeve is in contact with the terminal head.

[0009] Preferably, the inner wall of the sealing sleeve is provided with an inner ring groove, and a plurality of holding rings connected end to end from top to bottom are arranged in the inner ring groove, and the outer edge of the holding ring is flush with the inner wall of the through hole.

[0010] Preferably, the cross section of the embracing ring is triangular, the upper side of the embracing ring abuts on the terminal end, and the lower side of the embracing ring is provided with displacement grooves.

[0011] Preferably, the inner wall of the sealing sleeve is provided with a positioning groove, and a ceramic ring is arranged in the positioning groove and abuts on the terminal end.

[0012] Preferably, the terminal end is provided with an abutting cap which abuts on the upper side of the sealing cap.

[0013] (Three) beneficial effects

[0014] The utility model provides a kind of electric heating tube sealing silica gel cap.

[0015] 1, the sealing cap of the utility model is set in the top of electric heating tube, with the process of being inserted into the insertion slot of sealing cap, the position of electric heating tube sliding abutment on the arc-shaped side wall of sealing sleeve gradually makes the deformation amount of sealing sleeve gradually increase to be tightly attached on terminal end to form sealing, while due to the deformation amount of sealing sleeve gradually decreases from top to bottom, the embracing ring is embraced to terminal end by the displacement groove extrusion of the embracing ring, and terminal end is extruded downward, so that abutting cap can be extruded tightly on the upper side of sealing cap to achieve better sealing effect.

[0016] 2, the terminal end ceramic ring of the utility model makes the lower end of sealing sleeve reverse deformation and embrace electric heating tube, so that the connection effect of sealing cap and electric heating tube is better, and sealing cap is prevented from falling off from electric heating tube. DRAWINGS

[0017] Figure 1 It is a structure schematic view of the electric heating tube of the utility model;

[0018] Figure 2 It is a structure schematic view of the sealing cap of the utility model;

[0019] Figure 3 It is Figure 2 the local enlarged view of A in the middle.

[0020] In the drawing: 1, electric heating tube; 2, terminal end; 3, sealing cap; 4, abutting cap; 5, sealing sleeve; 6, ceramic ring; 7, embracing ring; 8, displacement groove. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings of the embodiments of the utility model.

[0022] The utility model embodiment provides a kind of electric heating tube sealing silica gel cap,

[0023] As Figures 1-2 shown, including electric heating tube 1 and terminal head 2, the upper part of the terminal head 2 is provided with a resistance cap 4, the electric heating tube 1 and the terminal head 2 are installed with a sealing cap 3, the resistance cap 4 is resisted on the upper side of the sealing, the middle part of the sealing cap 3 is provided with a through hole, the terminal head 2 is inserted into the through hole, the lower side of the sealing cap 3 is provided with an insertion slot, the insertion slot is sleeved on the end of the electric heating tube 1, the sealing sleeve 5 is arranged between the insertion slot and the through hole, the cross section of the sealing sleeve 5 gradually decreases from top to bottom, the outer side wall of the sealing sleeve 5 is arranged as an arc side wall, the inner wall of the sealing sleeve 5 coincides with the through hole, the electric heating tube 1 is slidably resisted on the arc side wall of the sealing sleeve 5, the inner wall of the sealing sleeve 5 is resisted on the terminal head 2, the lower side of the inner wall of the sealing sleeve 5 is provided with a positioning slot, the ceramic ring 6 is arranged in the positioning slot, and the ceramic ring 6 is resisted on the terminal head 2.

[0024] As Figure 3 shown, the inner wall of the sealing sleeve 5 is provided with an inner ring groove, the inner ring groove is provided with a plurality of clamping rings 7 connected head to tail from top to bottom, the outer edge of the clamping ring 7 is flush with the inner wall of the through hole, the clamping ring 7 can be hidden in the inner ring groove, and the clamping ring 7 will not be affected when the terminal head 2 is inserted into the through hole, avoiding extruding the clamping ring 7 to deform downward in advance, so that the subsequent clamping ring 7 clamps and presses the terminal head 2 more conveniently, the cross section of the clamping ring 7 is triangular, the clamping ring 7 includes a horizontal side and an inclined side from top to bottom, the horizontal side extends horizontally outward from the inner ring groove to be flush with the through hole, the inclined side extends from the inner wall of the inner ring groove to the outer edge of the horizontal side, the upper side of the clamping ring 7 is resisted on the terminal head 2, and the lower side of the clamping ring 7 is provided with a plurality of displacement grooves 8. Due to the extrusion of the electric heating tube 1 on the arc side wall, the deformation amount of the sealing sleeve 5 gradually decreases from top to bottom, that is, the horizontal deformation amount of the clamping ring 7 located at the horizontal side position on the upper side is greater than the horizontal deformation amount of the clamping ring 7 located at the inclined side position on the lower side, so that the clamping ring 7 deforms horizontally and downward at the same time, that is, the clamping ring 7 resists and clamps the terminal head 2 while extruding the terminal head 2 downward, so that the resistance cap 4 on the terminal head 2 extrudes tightly on the upper side of the sealing cap 3, achieving better sealing effect while avoiding the loosening of the terminal head 2.

[0025] Work flow: the utility model discloses the plug-in of wiring terminal 2 is inserted in the through hole of sealing cap 3, then the sealing cap 3 is set in the upper end of electric heating tube 1, with the in-depth of electric heating tube 1 and extrude the arc-shaped side wall of sealing sleeve 5, with the gradually increasing of the thickness of sealing sleeve 5, the gradually increasing of horizontal inward deformation amount, sealing sleeve 5 is tightly attached on the outer wall of wiring terminal and forms the sealing, and ceramic ring 6 will extrude sealing sleeve 5 in reverse and contact on the inner wall of electric heating tube 1, forms the sealing of electric heating tube 1.

[0026] In the process of sealing, the holding ring 7 in the inner ring groove is deformed inward and holds the wiring terminal 2 at the same time, and because the deformation amount of the horizontal side on the upper side is greater than that of the inclined side on the lower side, the holding ring 7 will be deformed downward while being horizontally deformed, and the displacement groove 8 provides displacement during deformation, and in this process, the horizontal side extrudes the wiring terminal 2 to slide downward, making the connection between the wiring terminal 2 and the sealing cap 3 more secure and avoiding loosening, and also pressing the wiring terminal 2 downward as a whole, increasing the pressure of the abutting cap 4 on the sealing cap 3, and improving the sealing effect between the sealing cap 3 and the abutting cap 4.

[0027] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A sealing silicone cap for an electric heating element, comprising an electric heating element and a wiring terminal, wherein a sealing cap is installed between the electric heating element and the wiring terminal, characterized in that: The sealing cap has a through hole in the middle, and the terminal is inserted into the through hole. The sealing cap has a insertion groove on the lower side, and the insertion groove is fitted onto the end of the heating tube. A sealing sleeve is provided between the insertion groove and the through hole. The width of the sealing sleeve gradually decreases from top to bottom. The outer side wall of the sealing sleeve is set as an arc-shaped side wall. The inner wall of the sealing sleeve coincides with the through hole. The heating tube slides and abuts against the arc-shaped side wall of the sealing sleeve. The inner wall of the sealing sleeve abuts against the terminal.

2. The silicone cap for sealing an electric heating element according to claim 1, characterized in that: The inner wall of the sealing sleeve is provided with an inner ring groove, and several clamping rings connected end to end from top to bottom are provided in the inner ring groove. The outer edge of the clamping ring is flush with the inner wall of the through hole.

3. The silicone cap for sealing an electric heating tube according to claim 2, characterized in that: The clamping ring has a triangular cross-section, the upper side of the clamping ring abuts against the terminal, and the lower side of the clamping ring is provided with several displacement grooves.

4. The sealing silicone cap for an electric heating tube according to claim 3, characterized in that: The lower inner wall of the sealing sleeve is provided with a positioning groove, and a ceramic ring is provided in the positioning groove, which abuts against the terminal.

5. A silicone cap for sealing a heating element according to claim 4, characterized in that: The terminal is provided with an abutment cap, which abuts against the upper side of the seal.

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