Heated cable joint structure

Abstract

This invention discloses a heating cable connector structure, relating to the technical field of heavy oil thermal recovery equipment. The heating cable connector structure includes: a cylindrical first mounting portion and a first connecting portion. The first mounting portion is used for mounting the end of a heating cable. The first connecting portion has a first connecting terminal. The first connecting portion is sealed to the first mounting portion via a quick-release structure. A first sealing element is provided within the first connecting portion, and the first connecting terminal is mounted on the first sealing element. The first connecting terminal can be detachably connected to the heating cable harness. The first mounting portion has a first quick-release sealing structure, which can fix the end of the heating cable within the first mounting portion and form a seal between the heating cable and the first mounting portion. The technical solution provided by this invention can solve the problem of cumbersome sealing at the heating cable and connector.

Description

Technical Field

[0001] This invention relates to the field of heavy oil thermal recovery equipment technology, and in particular to a heating cable joint structure. Background Technology

[0002] In heavy oil extraction, electric heating is used to reduce the viscosity of crude oil, facilitating extraction. Heating cables are placed underground and connected to the power cables on the surface or drilling platform via connectors (cable crossover devices / heating cable adapters). The connection between the heating cable and the connector is sealed with adhesive, a cumbersome and time-consuming process that is inconvenient for on-site use. Summary of the Invention

[0003] The main objective of this invention is to propose a heating cable connector structure that aims to solve the problem of complicated sealing at the heating cable and connector.

[0004] To achieve the above objectives, the heating cable connector structure proposed in this invention includes: The first mounting part and the first connecting part are cylindrical in shape. The first mounting part is used for mounting the end of the heating cable. The first connecting part is provided with a first connecting terminal. The first connecting part is sealed to the first mounting part through a quick-release structure. The first connecting part is provided with a first sealing element. The first connecting terminal is installed on the first sealing element. The first connecting terminal can be detachably connected to the wire harness of the heating cable. The first mounting part is provided with a first quick-release sealing structure, which can fix the end of the heating cable in the first mounting part and form a seal between the heating cable and the first mounting part.

[0005] In one embodiment, the wire harness is connected to the first connection terminal via a second connection terminal, the second connection terminal being plugged into the first connection terminal and fixed together by screw fastening; And / or, the first seal is made of rubber and is formed by casting.

[0006] In one embodiment, the inner wall of the first mounting portion is provided with a first limiting step, which is used to limit the end of the heating cable. The first quick-release sealing structure includes a wedge ring and a first fixing member. The wedge ring is disposed inside the first mounting part and can be sleeved on the outside of the heating cable. The inner wall of the first mounting part has a first inclined surface that cooperates with the wedge ring. The first fixing member is detachably connected to the first mounting part and can push against the wedge ring so that the wedge ring moves toward the first inclined surface.

[0007] In one embodiment, the first fastener is configured as a cylindrical structure, the outer side of the first fastener is threadedly connected to the inner wall of the first mounting portion, the first fastener has a first end located inside the first mounting portion, and the first end is capable of pushing against the wedge ring.

[0008] In one embodiment, the first quick-release sealing structure further includes a first ring body, which is disposed between the first fixing member and the wedge-shaped ring, and the first fixing member can push against the wedge-shaped ring through the first ring body.

[0009] In one embodiment, the first end is provided with a first clearance groove, and the first ring body can be disposed in the first clearance groove; The inner wall of the first mounting part is provided with a second clearance groove, which is located at the end of the first limiting step facing the first fixing member; Alternatively, the inner wall of the first mounting part may also be provided with a first mounting groove, which is used for mounting the first sealing ring; Alternatively, the heating cable connector structure may further include a second fastener that can pass through the first mounting portion and be connected to the heating cable.

[0010] In one embodiment, the quick-release structure includes a second connecting portion, which is connected to the first mounting portion via a second quick-release sealing structure, and the second connecting portion is connected to the first connecting portion via a third quick-release sealing structure.

[0011] In one embodiment, the second quick-release sealing structure includes a cylindrical second fixing member, an annular protrusion is provided on the outer side of the first mounting part, a second step is provided on the inner wall of the second connecting part, the first mounting part is inserted into the second connecting part, one end of the annular protrusion abuts against the second step, the second fixing member is detachably connected to the second connecting part and abuts against the other end of the annular protrusion.

[0012] In one embodiment, the outer side of the second fastener is threadedly connected to the inner wall of the second connecting portion; And / or, a second sealing ring is further provided between the second connecting part and the first mounting part; And / or, the second quick-release sealing structure further includes a first fastener capable of positioning the second fixing member outside the first mounting portion.

[0013] In one embodiment, the third quick-release sealing structure includes a first threaded section disposed on the outside of the first connecting portion and a second threaded section disposed on the inner wall of the second connecting portion and away from the first mounting portion, wherein the first connecting portion is connected to the second connecting portion through the first threaded section and the second threaded section; And / or, the second connecting part is provided with a through hole on its periphery, and a second sealing element is provided at the through hole.

[0014] The technical solution of the present invention uses a quick-release structure to connect the first connecting part and the first mounting part, and the first connecting part is provided with a first sealing element. The first mounting part is provided with a first quick-release sealing structure. The first quick-release sealing structure can fix the end of the heating cable in the first mounting part and form a sealing structure between the heating cable and the first mounting part. At the same time, the quick-release structure can seal the connection between the first connecting part and the first mounting part, so that the connection between the first connecting part and the first mounting part is also sealed. Thus, under the action of the quick-release structure and the first quick-release sealing structure, the first connecting part and the first mounting part can be quickly connected to complete the installation of the heating cable, and can ensure that the connection has a good sealing effect, thereby solving the technical problems existing in the prior art. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 A schematic diagram of an embodiment of the heating cable connector structure provided by the present invention; Figure 2 for Figure 1 A schematic diagram of the internal structure of the heating cable connector; Figure 3 This is an assembly diagram of an embodiment of the first connecting part and the second connecting terminal in the heating cable connector structure provided by the present invention. Figure 4 This is an assembly diagram of an embodiment of the first mounting part, the second connecting part, and the second fixing member in the heating cable connector structure provided by the present invention. Figure 5 This is an assembly diagram of an embodiment of the first quick-release sealing structure in the heating cable connector structure provided by the present invention.

[0017] Explanation of icon numbers: 100. First mounting part; 110. First limiting step; 120. First inclined surface; 130. Second clearance groove; 140. Ring protrusion; 200, First connecting part; 210, First connecting terminal; 230, First sealing element; 300. Second connecting part; 310. Second step; 320. Second sealing element; 400. Heating cable; 410. Wire harness; 500. First quick-release sealing structure; 510. Wedge ring; 511. Second inclined surface; 520. First fixing member; 521. First end; 522. First clearance groove; 530. First ring body; 540. First sealing ring; 600. Second quick-release sealing structure; 610. Second fastener; 620. Second sealing ring; 630. First fastener; 800. Second fastener; 900, Second connection terminal.

[0018] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0022] In heavy oil extraction, electric heating is used to reduce the viscosity of crude oil, making it easier to extract. The heating cable is placed underground and connected to the surface cable via a connector (cable runner). When connecting the heating cable and the connector, the heating current is sealed to the connector by injecting glue. Because the glue sealing method is cumbersome and time-consuming, it is inconvenient for on-site use.

[0023] This invention proposes a heating cable connector structure.

[0024] Please see Figure 1 , Figure 2 In one embodiment of the present invention, the heating cable connector structure includes: The first mounting portion 100 and the first connecting portion 200 are cylindrical in shape. The first mounting portion 100 is used for mounting the end of the heating cable 400. The first connecting portion 200 is provided with a first connecting terminal 210. The first connecting portion 200 is sealed to the first mounting portion 100 through a quick-release structure. The first connecting portion 200 is provided with a first sealing element 230, and the first connecting terminal 210 is installed in the first sealing element 230. The first connecting terminal 210 can be detachably connected to the wire harness 410 of the heating cable 400. The first mounting portion 100 is provided with a first quick-release sealing structure 500, which can fix the end of the heating cable 400 in the first mounting portion 100 and form a seal between the heating cable 400 and the first mounting portion 100. It should be noted that the heating cable 400 is fixed in the first mounting portion 100 through the first quick-release sealing structure 500. Next, the connecting terminal is connected to the wire harness 410. The connecting terminal and wire harness 410 can be plugged in or detachably connected by screws. Further, in some embodiments, refer to... Figure 3 , Figure 4 , Figure 5 The wiring harness 410 is connected to the first connecting terminal 210 via a second connecting terminal 900. Specifically, the second connecting terminal 900 is first inserted into the first connecting terminal 210, and then fixed in place by screws. It should be noted that one end of the first connecting terminal 210 is connected to the wiring harness 410, and the other end is connected to the ground circuit. In other words, the wiring harness 410 of the heating cable 400 can be connected to a ground circuit via the first connecting terminal 210. Further, after the second connecting terminal 900 is connected to the first connecting terminal 210, the first connecting part 200 and the first mounting part 100 are connected via a quick-release structure. In some embodiments, the quick-release structure can be configured as a threaded cylindrical structure, rotatably mounted on the first connecting part 200. The first mounting part 100 has threads on its outer side, and the cylindrical structure connects to the threads on the outer side of the first mounting part 100, thereby connecting the first connecting part 200 and the first mounting part 100.

[0025] Furthermore, since the first connecting part 200 is provided with a first sealing element 230, and the first connecting terminal 210 is installed on the first sealing element 230, the first connecting terminal 210 can be set through the first sealing element 230 or not. It should be noted that if the first connecting terminal 210 is not set through the first sealing element 230, the first sealing element 230 is provided with a guide groove. The second connecting terminal 900 is first inserted into the guide groove, and under the action of the guide groove, it is connected to the first connecting terminal 210.

[0026] The present invention uses a quick-release structure to connect the first connecting part 200 and the first mounting part 100. The first connecting part 200 is provided with a first sealing element 230, and the first mounting part 100 is provided with a first quick-release sealing structure 500. The first quick-release sealing structure 500 can fix the end of the heating cable 400 in the first mounting part 100 and form a sealing structure between the heating cable 400 and the first mounting part 100. At the same time, the quick-release structure can seal the connection between the first connecting part 200 and the first mounting part 100, so that the connection between the first connecting part 200 and the first mounting part 100 is also sealed. Thus, under the action of the quick-release structure and the first quick-release sealing structure 500, the first connecting part 200 and the first mounting part 100 can be quickly connected to complete the installation of the heating cable 400 and ensure a good sealing effect at the connection.

[0027] Furthermore, in some embodiments, reference is made to... Figure 3The first sealing element is made of rubber and is formed by casting. It should be noted that when the first sealing element is formed by casting, it can be seen that the first connecting terminal 210 and the second connecting terminal 900 are in a vacuum state.

[0028] In one embodiment, reference Figure 5 The inner wall of the first mounting part 100 is provided with a first limiting step 110. The first limiting step 110 is used to limit the end of the heating cable 400. It can be understood that when the heating cable 400 is inserted into the interior of the first mounting part 100, the end of the heating cable 400 abuts against the first limiting step 110. It should be noted that when the heating cable 400 is inserted into the first mounting part 100, the wire harness 410 of the heating cable 400 is exposed on the outside of the end. That is to say, the end of the heating cable 400 is stripped to expose the wire harness 410 inside the heating cable 400. The specific exposed length of the wire harness 410 is selected according to the installation specifications of the heating cable 400.

[0029] The first quick-release sealing structure 500 includes a wedge-shaped ring 510 and a first fixing member 520. The wedge-shaped ring 510 is disposed inside the first mounting portion 100 and can be sleeved on the outside of the heating cable 400. The inner wall of the first mounting portion 100 has a first inclined surface 120 that mates with the wedge-shaped ring 510. When the heating cable 400 is installed inside the first mounting portion 100, the wedge-shaped ring 510 is sleeved on the outside of the heating cable 400. Specifically, in use, the wedge-shaped ring 510 can be first sleeved on the outside of the heating cable 400 at a preset position. This preset position is the distance between the end of the heating cable 400 and the first inclined surface 120 when the heating cable 400 is fully installed inside the first mounting portion 100, or slightly greater than the distance between the end of the heating cable 400 and the first inclined surface 120. The first fixing member 520 is detachably connected to the first mounting portion 100 and can push against the wedge ring 510, causing the wedge ring 510 to move toward the first inclined surface 120, wherein the wedge ring 510 is configured as an open ring. Further, in some embodiments, the first fixing member 520 and the first mounting portion 100 can be connected by a snap-fit ​​mechanism. Specifically, the first fixing member 520 is first inserted into the first mounting portion 100, and then the first fixing member 520 and the first mounting portion 100 are connected together by a snap-fit ​​mechanism. During insertion, the first fixing member 520 can push against the wedge ring 510, causing the wedge ring to move toward the first inclined surface 120. When the wedge ring 510 moves toward the first inclined surface 120, the friction between the wedge ring 510 and the heating cable 400 increases under the action of the first inclined surface 120, and the sealing effect between them is improved with the increase in friction. Similarly, after the first fixing member 520 releases the locking relationship (buckle locking) between itself and the first mounting part 100, the first fixing member 520 can be pulled out from the first mounting part 100, and the heating cable 400 can then be pulled out from the first mounting part 100, which facilitates the disassembly and assembly of the heating cable 400.

[0030] In one embodiment, reference Figure 5The first fixing member 520 is configured as a cylindrical structure. The outer side of the first fixing member 520 is threadedly connected to the inner wall of the first mounting portion 100. The first fixing member 520 has a first end 521, which is located inside the first mounting portion 100. The first end 521 can push against the wedge-shaped ring 510. Specifically, during installation, the first fixing member 520 is inserted into the inner wall of the first mounting portion 100. Then, by rotating the first fixing member 520, it moves inward into the first mounting portion 100. When it moves to the designated position, the first fixing member 520 pushes against the wedge-shaped ring 510. It should be noted that when the first fixing member 520 and the first mounting portion 100 are connected by a threaded connection, the threaded connection can form a good seal between the first fixing member 520 and the first mounting portion 100.

[0031] In one embodiment, reference Figure 5 The first quick-release sealing structure 500 also includes a first ring body 530, which is disposed between the first fixing member 520 and the wedge ring 510. The first fixing member 520 can push against the wedge ring 510 through the first ring body 530. It should be noted that the vibration generated by the wedge ring 510 can be reduced by the first ring body 530 and then transmitted to the first fixing member 520. Without the first ring body 530, the vibration generated by the wedge ring 510 during use would directly act on the first fixing member 520, thereby affecting the connection stability between the first fixing member 520 and the first mounting part 100.

[0032] In one embodiment, reference Figure 5 The first end 521 is provided with a first clearance groove 522, and the first ring body 530 can be disposed in the first clearance groove 522. This arrangement allows the first ring body 530 and the first fixing member 520 to have a partial overlap in structure along the axis of the first ring body 530, which can reduce the space occupied. The inner wall of the first mounting part 100 is provided with a second clearance groove 130. The second clearance groove 130 is located at one end of the first limiting step 110 facing the first fixing member 520. It should be noted that the second clearance groove 130 can make way for the first end 521 of the first fixing member 520 so that the first ring body 530 can abut against the wedge ring 510.

[0033] Furthermore, in some embodiments, reference is made to... Figure 5The wedge-shaped ring 510 has a second inclined surface 511 at one end near the first fixing member 520. The first ring body 530 abuts against the second inclined surface 511. Under the action of the second inclined surface 511, the wedge-shaped ring 510 can apply a reaction force to the first ring body 530, thereby increasing the friction between the first ring body 530 and the heating cable 400, thus improving the sealing effect between the first ring body 530 and the heating cable 400. The first ring body 530 is configured as an open ring. It should also be noted that if the first fixing member 520 is pulled out from the first mounting part 100, the first ring body 530 can be easily removed from the first mounting part 100 because it lacks the clamping force of the first fixing member 520.

[0034] In one embodiment, reference Figure 5 The inner wall of the first mounting part 100 is also provided with a first mounting groove, which is used for the installation of the first sealing ring 540. It should be noted that after the heating cable 400 is installed into the first mounting part 100, the first sealing ring 540 can further improve the sealing between the heating cable 400 and the inner wall of the first mounting part 100.

[0035] In one embodiment, reference Figure 1 , Figure 2 The heating cable 400 structure also includes a second fastener 800, which penetrates the first mounting portion 100 and connects to the heating cable 400. Further, the second fastener 800 is configured as a screw, with its axis perpendicular to the axis of the first mounting portion 100. The screw further improves the connection stability between the heating cable 400 and the first mounting portion 100. Specifically, the screw passes through the first mounting portion 100 and abuts against the outside of the heating cable 400, increasing friction to enhance the connection stability. However, this design is not limited to this. In other embodiments, the screw can also extend into the outer sheath of the heating cable 400 to a certain depth. Without affecting the operation of the internal wiring harness 410 of the heating cable 400, this method provides a constraint between the heating cable 400 and the first mounting portion 100, thereby increasing the connection stability.

[0036] In one embodiment, reference Figure 1 , Figure 2The quick-release structure includes a second connecting part 300, which is connected to the first mounting part 100 via a second quick-release sealing structure 600. The second connecting part 300 is also connected to the first connecting part 200 via a third quick-release sealing structure. It should be noted that the second connecting part 300 is provided between the first connecting part 200 and the first mounting part 100, which can indirectly transmit vibration. In other words, the second connecting part 300 can absorb vibration.

[0037] In one embodiment, reference Figure 4 The second quick-release sealing structure 600 includes a cylindrical second fixing member 610. The outer side of the first mounting part 100 is provided with an annular protrusion 140, and the inner wall of the second connecting part 300 is provided with a second step 310. The first mounting part 100 is inserted into the second connecting part 300, and one end of the annular protrusion 140 abuts against the second step 310. The second fixing member 610 is detachably connected to the second connecting part 300 and abuts against the other end of the annular protrusion 140. Specifically, the second fixing member 610 can be sleeved on the outer side of the first mounting part 100. At this time, the first mounting part 100 is inserted into the second connecting part 300, so that one end of the annular protrusion 140 abuts against the second step 310. Then, the second fixing member 610 is connected and fixed to the second connecting part 300 and abuts against the other end of the annular protrusion 140, thereby fixing the annular protrusion 140 on the second connecting part 300, and thus realizing the connection between the first mounting part 100 and the second connecting part 300.

[0038] In one embodiment, reference Figure 4 The outer side of the second fixing member 610 is threadedly connected to the inner wall of the second connecting part 300, which facilitates the connection between the second fixing member 610 and the second connecting part 300. At the same time, the threaded connection improves the sealing effect at the connection between the second fixing member 610 and the second connecting part 300.

[0039] In one embodiment, reference Figure 4 A second sealing ring 620 is also provided between the second connecting part 300 and the first mounting part 100, which can improve the sealing effect between the second connecting part 300 and the first mounting part 100.

[0040] In one embodiment, reference Figure 1The second quick-release sealing structure 600 also includes a first fastener 630, which can position the second fixing member 610 on the outside of the first mounting part 100 to prevent the second fixing member 610 from loosening during use. The first fastener 630 is configured as a screw, which passes through the second fixing member 610 and abuts against the outside of the first mounting part 100. By increasing the friction between the screw and the first mounting part 100, the connection stability between the second fixing member 610 and the first mounting part 100 is improved.

[0041] In one embodiment, reference Figure 5 The third quick-release sealing structure includes a first threaded section on the outside of the first connecting part 200 and a second threaded section on the inner wall of the second connecting part 300 and away from the first mounting part 100. The first connecting part 200 is connected to the second connecting part 300 through the first threaded section and the second threaded section, which facilitates quick disassembly and installation of the first connecting part 200 and the second connecting part 300 and improves the disassembly and installation efficiency between them.

[0042] In one embodiment, reference Figure 1 The second connecting portion 300 has a through hole on its periphery, and a second sealing element 320 is provided at the through hole. Further, this through hole can serve as a vent during installation. It can also serve as an injection hole; when used as an injection hole, injecting adhesive into the second connecting portion 300 can further improve the sealing effect between the first connecting portion 200 and the first mounting portion 100. It should be noted that there are two through holes, and the second sealing element 320 is configured as a plug.

[0043] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A heating cable connector structure, characterized in that, comprising: a first mounting part and a first connecting part of cylindrical structure, wherein the interior of the first mounting part is used for mounting the end part of a heating cable, the first connecting part is provided with a first connecting terminal, the first connecting part is in sealed connection with the first mounting part through a quick-release structure, a first sealing member is arranged inside the first connecting part, the first connecting terminal is mounted on the first sealing member, and the first connecting terminal can be detachably connected with the wire harness of the heating cable; The first mounting part is provided with a first quick-release sealing structure, which can fix the end part of the heating cable in the first mounting part and form a seal between the heating cable and the first mounting part.

2. The heating cable connector structure as described in claim 1, characterized in that, The wire harness is connected with the first connecting terminal through a second connecting terminal, the second connecting terminal is plugged with the first connecting terminal, and the two are fixed to each other by means of screw locking; and / or, the first sealing member is made of rubber, and the first sealing member is formed by casting.

3. The heating cable connector structure as described in claim 1, characterized in that, The inner wall of the first mounting part is provided with a first limiting step, and the first limiting step is used for limiting the end part of the heating cable; The first quick-release sealing structure comprises a wedge ring and a first fixing member, the wedge ring is arranged in the first mounting part and can be sleeved on the outer side of the heating cable; the inner wall of the first mounting part is provided with a first inclined surface matched with the wedge ring, the first fixing member is detachably connected with the first mounting part and can push the wedge ring, so that the wedge ring moves towards the first inclined surface.

4. The heating cable connector structure as described in claim 3, characterized in that, The first fixing member is configured as a cylindrical structure, the outer side of the first fixing member is in threaded connection with the inner wall of the first mounting part, the first fixing member has a first end, the first end is located inside the first mounting part, and the first end can push the wedge ring.

5. The heating cable connector structure as described in claim 4, characterized in that, The first quick-release sealing structure further comprises a first ring body, the first ring body is arranged between the first fixing member and the wedge ring, and the first fixing member can push the wedge ring through the first ring body.

6. The heating cable connector structure as described in claim 5, characterized in that, The first end is provided with a first avoiding groove, and the first ring body can be arranged in the first avoiding groove; The inner wall of the first mounting part is provided with a second avoiding groove, and the second avoiding groove is arranged at one end of the first limiting step facing the first fixing member; or, the inner wall of the first mounting part is further provided with a first mounting groove, and the first mounting groove is used for mounting a first sealing ring; or, the heating cable joint structure further comprises a second fastener, and the second fastener can penetrate through the first mounting part and is connected with the heating cable.

7. The heating cable connector structure as described in claim 1, characterized in that, The quick-release structure comprises a second connecting part, the second connecting part is connected with the first mounting part through a second quick-release sealing structure, and the second connecting part is connected with the first connecting part through a third quick-release sealing structure.

8. The heating cable connector structure as described in claim 7, characterized in that, The second quick-release sealing structure comprises a second fixing member of cylindrical structure, a ring protrusion is arranged on the outer side of the first mounting part, a second step is arranged on the inner wall of the second connecting part, the first mounting part is inserted into the second connecting part, one end of the ring protrusion abuts against the second step, and the second fixing member is detachably connected with the second connecting part and abuts against the other end of the ring protrusion.

9. The heating cable connector structure as described in claim 8, characterized in that, The outer side of the second fastener is threadedly connected to the inner wall of the second connecting part; And / or, a second sealing ring is further provided between the second connecting part and the first mounting part; And / or, the second quick-release sealing structure further includes a first fastener capable of positioning the second fixing member outside the first mounting portion.

10. The heating cable connector structure as described in claim 7, characterized in that, The third quick-release sealing structure includes a first threaded section disposed on the outside of the first connecting part and a second threaded section disposed on the inner wall of the second connecting part and away from the first mounting part. The first connecting part is connected to the second connecting part through the first threaded section and the second threaded section. And / or, the second connecting part is provided with a through hole on its periphery, and a second sealing element is provided at the through hole.

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