A plastic-sealed branching device and its assembly process

Abstract

The present invention discloses a plastic-sealed branching device, which includes a locking nut, a shuttle-shaped spring chuck is arranged inside the locking nut, the spring chuck and the locking nut are locked by a conical sleeve, the conical sleeve is connected to the branch cable by a straight terminal, and the locking nut is wrapped with a first filling plastic layer; a Z-shaped terminal is arranged inside the first filling plastic layer, one end of the Z-shaped terminal is coaxial with the locking nut, and the other end is connected to the branch cable; the first filling plastic layer is wrapped with a second filling plastic layer, and one end of the first filling plastic layer and the second filling plastic layer are fixedly connected to a flange and a gland. The assembly process of the present invention includes steps S1-S9, the present invention is fixed to the customer's mechanism by a flange between the client, the construction is convenient, and the customer is convenient to use; the molding process completely fills the gap between the parts, and the electrical performance is better under the same volume; the clamping process is used to realize the power supply of the shielding layer, and the production process is simple and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical connectors, and in particular to a plastic-sealed splitter and an assembly process thereof. Background Art

[0002] The function of the cable splitter is to separate the shielding layer and inner conductor layer of the high-voltage coaxial cable from the same cable into two independent cables, which is convenient for connection with corresponding devices, allowing the shielding layer and the inner conductor to form a complete circuit loop to realize the input and output of current.

[0003] Usually, the insulation shell of the branching device is assembled by machined parts, which needs to be assembled on site at the client. The client construction period is long and the installation cost is high. At the same time, it will pollute the client's on-site environment. In addition, there are usually gaps between the assemblies. The relevant gaps have the risk of high-voltage breakdown under high-voltage environment, and the withstand voltage level will be affected under the same volume. The shielding layer connection power supply mode is to wrap the external copper wire tightly around the shielding layer copper wire to bundle it, then solder it with tin, and then weld the branch cable 17 on it. This solution is complicated to operate, the process is cumbersome, and the reliability is also low. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a plastic-sealed splitter and an assembly process thereof, which can solve the problems of poor sealing and breakdown risk of the assembled splitter in the prior art.

[0005] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0006] A plastic-sealed branching device is provided, which includes a locking nut, a shuttle-shaped spring clamp is arranged inside the locking nut, the spring clamp and the locking nut are locked by a tapered sleeve, the tapered sleeve is connected to the branch cable by a straight terminal, and the locking nut is wrapped with a first filling plastic layer; a Z-shaped terminal is arranged inside the first filling plastic layer, one end of the Z-shaped terminal is coaxial with the locking nut, and the other end is connected to the branch cable; the first filling plastic layer is wrapped with a second filling plastic layer, and one end of the first filling plastic layer and the second filling plastic layer are fixedly connected to a flange and a cable gland.

[0007] Furthermore, the conical sleeve is clamped in the gap between the spring clamp and the locking nut by applying a lateral force, a support tube is arranged in the spring clamp, and the support tube is clamped in the inner insulating layer of the main coaxial cable.

[0008] Furthermore, a "T"-shaped groove is provided on the end surface of the flange, one end of the second filling plastic layer is embedded in the "T"-shaped groove, and a plurality of mutually matching convex teeth and grooves are provided between the first filling plastic layer and the second filling plastic layer.

[0009] Furthermore, a gland is provided inside the flange, and a sealing ring is provided between the gland and the flange.

[0010] Furthermore, the outer cover of the second filling plastic layer is provided with a rubber sleeve, and the outer surface of the rubber sleeve is provided with a plurality of protrusions.

[0011] Furthermore, a positioning groove is arranged on the periphery of the locking nut.

[0012] Furthermore, a plurality of positioning posts are disposed on the first filling plastic layer, and the positioning posts are embedded in the second filling plastic layer.

[0013] Furthermore, a bracket is arranged in the first filling plastic layer, the bracket is sleeved outside the insulating layer of the inner conductor of the main coaxial cable, and the bracket is arranged between the insulating layer and the branch cable.

[0014] Furthermore, the connection end of the Z-type terminal and the straight terminal are staggered in the axial direction of the main coaxial cable.

[0015] An assembly process of a plastic-sealed splitter comprises the following steps:

[0016] S1: Pre-insert the flange, sealing ring and cable gland into the cut and stripped main coaxial cable;

[0017] S2: The spring collet and the locking nut are pre-assembled together by axial pressure, and then positioned at the stripping position of the main coaxial cable;

[0018] S3: bury the support tube under the shielding layer of the main coaxial cable and push it to a predetermined position, insert the conical sleeve into the main coaxial cable, and insert it between the spring collet and the locking nut, and assemble it with the spring collet and the locking nut to form a locking structure;

[0019] S4: The straight terminal is connected to the inner conductor of the branch cable through a crimping process, and then the screw on the head of the straight terminal is threadedly connected to the screw hole on the conical sleeve to achieve the connection between the shielding layer of the main coaxial cable and the inner conductor of the branch cable;

[0020] S5: Then, a bracket is inserted into the insulation layer of the stripped inner conductor of the main coaxial cable, and then the inner conductor of the main coaxial cable and the inner conductor of the branch cable are crimped together with the two ends of the Z-type terminal to achieve the connection between the inner conductor of the main coaxial cable and the inner conductor of the branch cable;

[0021] S6: putting the components assembled in step S5 into a primary molding mold, injecting hot material into the primary molding mold, and after the hot material cools to form a first filling plastic layer, taking out the primary molding mold to complete the molding of the first filling plastic layer;

[0022] S7: A thread is formed on the connection end between the first filling plastic layer and the flange, and an internal thread is formed on the connection end of the flange;

[0023] S8: Wrap nylon tape around the outer insulation layer of the main coaxial cable close to the first filling plastic layer, and then assemble and lock the flange, gland and sealing ring, ensuring that the gland presses the nylon tape, the flange is threadedly connected to the first filling plastic layer, and apply primer to the flange and the outer periphery of the roots of the two branch cables;

[0024] S9: loading the components assembled in step S8 into a secondary molding die, injecting hot material into the secondary molding die, and after cooling to form a second filling plastic layer, taking out the secondary molding die to complete the molding of the second filling plastic layer;

[0025] S10: Two rubber sleeves are mounted on the molded second filling plastic layer to complete the assembly of the entire plastic-sealed splitter.

[0026] The beneficial effects of the present invention are as follows: this scheme connects one of the branch cables with the tapered sleeve through a straight terminal, and the tapered sleeve pushes the spring clamp and the shielding layer of the main coaxial cable through a locking mechanism to press tightly, thereby realizing the connection and conduction between the shielding layer and one branch cable; and the other branch cable is connected to the inner conductor of the main coaxial cable by crimping the Z-type terminal and the inner conductor of the main coaxial cable; and through the injection molding process, hot insulating material is injected to encapsulate the aforementioned components and fix their positions; and then through the secondary injection molding process, the first molded components and the external flange are encapsulated, molded and fixed, and finally the design corresponding to the electrical performance requirements and appearance requirements is completed.

[0027] A "T"-shaped groove is opened on the end face of the flange to ensure that the second filling plastic layer of the secondary molding can be tightly combined with the end face of the flange to avoid the problem of the two being separated; by wrapping nylon tape on the outer insulation layer of the main coaxial cable, it is prevented that the liquid of the hot material will not burn the outer insulation layer during the thermoforming of the second filling plastic layer, thereby affecting the electrical performance of the main coaxial cable; the gland and the sealing ring are sealed together to prevent the thermal insulation material from "escaping" during the thermoforming process.

[0028] The pre-buried support tube plays a supporting role to avoid the main coaxial cable corresponding position not having hard support during the locking process of the conical sleeve, and thus being unable to clamp the shielding layer. At the same time, the support tube has a slotted structure, which can be deformed and reduce the inner diameter during the extrusion process, clamping the main coaxial cable into the inner insulation layer. The entire product is covered with a rubber sleeve on the outside, which further improves the electrical performance and also has an aesthetic effect. The surface of the rubber sleeve has convexities, which not only has an aesthetic effect but also has a non-slip grip. The coloring of the rubber sleeve also serves as a high-voltage warning.

[0029] A positioning groove is designed on the locking nut, and a matching positioning groove and positioning ring are designed on the first molding mold. The corresponding structure can realize the X / Y / Z three-dimensional positioning of the product to ensure that the plastic structure of the first molding meets the design. Multiple positioning columns are designed on the plastic structure of the first molding to ensure that the plastic structure of the first molding is centered in the mold of the second molding, ensure that the wall thickness of the second molding is uniform, and avoid deflection and deformation due to molding pressure.

[0030] The present invention is fixed to the customer's mechanism through a flange between the client's ends, which is convenient for construction and easy for customers to use. The molding process completely fills the gaps between the parts, and the electrical performance is better under the same volume. The clamping process is used to realize the power supply of the shielding layer, and the production process is simple and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional cross-sectional view of a plastic-sealed splitter.

[0032] Figure 2 This is a structural diagram of the first filling plastic layer.

[0033] Figure 3 Schematic diagram of the support tube structure.

[0034] Among them, 1. positioning groove, 2. convex teeth, 3. "T"-shaped groove, 4. positioning ring, 5. positioning column, 6. cable gland, 7. flange, 8. rubber sleeve, 9. second filling plastic layer, 10. locking nut, 11. spring collet, 12. conical sleeve, 13. support tube, 14. first filling plastic layer, 15. bracket, 16. Z-type terminal, 17. branch cable, 18. branch cable inner conductor, 19. straight terminal, 20. sealing ring, 21. nylon tape. DETAILED DESCRIPTION

[0035] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0036] like Figure 1As shown, the plastic-sealed branching device includes a locking nut 10, a shuttle-shaped spring clamp 11 is arranged inside the locking nut 10, the spring clamp 11 and the locking nut 10 are locked by a conical sleeve 12, the spring clamp 11 is clamped in the locking nut 10, and the conical sleeve 12 is connected to the branch cable 17 through a straight terminal 19, and the locking nut 10 is wrapped with a first filling plastic layer 14; a Z-type terminal 16 is arranged in the first filling plastic layer 14, one end of the Z-type terminal 16 is coaxial with the locking nut 10, and the other end is fixedly connected to the branch cable 17; the first filling plastic layer 14 is wrapped with a second filling plastic layer 9, and one end of the first filling plastic layer 14 and the second filling plastic layer 9 are both fixedly connected to the flange 7 and the cable gland 6; the connection end of the Z-type terminal 16 is staggered with the straight terminal 19 in the axial direction of the main coaxial cable.

[0037] This solution connects one of the branch cables 17 to the tapered sleeve 12 through a straight terminal 19, and the tapered sleeve 12 pushes the spring clamp 11 to press the shielding layer of the main coaxial cable through a locking mechanism, so as to achieve connection and conduction between the shielding layer and one branch cable 17; and the other branch cable 17 is connected to the inner conductor of the main coaxial cable by crimping the Z-type terminal 16 and the inner conductor of the main coaxial cable; and through the injection molding process, hot insulating material is injected to encapsulate each connecting component and fix the position; and then through the secondary injection molding process, the first molded component is encapsulated, molded and fixed with the external flange 7, and finally the design corresponding to the electrical performance requirements and appearance requirements is completed.

[0038] like Figure 1 and Figure 3 As shown, the conical sleeve 12 is clamped in the gap between the spring collet 11 and the locking nut 10 by applying a lateral force, and a support tube 13 is provided in the spring collet 11, and the support tube 13 is clamped and sleeved on the inner insulating layer of the main coaxial cable. The pre-buried support tube 13 plays a supporting role to avoid the main coaxial cable having no hard support at the corresponding position during the locking process of the conical sleeve 12, and thus being unable to clamp the shielding layer. At the same time, the support tube 13 has a slotted structure, which can be deformed and reduce the inner diameter during the extrusion process, and clamp the main coaxial cable into the inner insulating layer.

[0039] like Figure 1 and Figure 2 As shown, a "T"-shaped groove 3 is provided on the end surface of the flange 7, and one end of the second filling plastic layer 9 is embedded in the "T"-shaped groove 3. The "T"-shaped groove 3 is provided on the end surface of the flange 7 to ensure that the second filling plastic layer 9 formed by secondary molding can be tightly combined with the end surface of the flange 7 to avoid the problem of the two being separated.

[0040] A plurality of mutually matching protruding teeth 2 and grooves are disposed between the first filling plastic layer 14 and the second filling plastic layer 9 to facilitate axial fixation of the first filling plastic layer 14 and the second filling plastic layer 9 .

[0041] A gland 6 is clamped inside the flange 7, a sealing ring 20 is clamped between the gland 6 and the flange 7, and the gland 6 is sleeved on the unstripped end of the main coaxial cable; by winding a nylon tape 21 on the outer insulating layer of the main coaxial cable, it is prevented that the liquid of the hot material will burn the outer insulating layer during the thermoforming of the second filling plastic layer 9, thereby affecting the electrical performance of the main coaxial cable; the gland 6 and the sealing ring 20 cooperate to perform sealing, thereby preventing the thermal insulation material from "escaping" during the thermoforming process.

[0042] The second filling plastic layer 9 is covered with two rubber sleeves 8, and the outer surfaces of the two rubber sleeves 8 are provided with a number of protrusions; the rubber sleeve 8 is covered on the outside of the entire product, which further improves the electrical performance and has an aesthetic effect. The surface of the rubber sleeve 8 has protrusions, which has an anti-slip effect when held on the basis of aesthetics, and the coloring of the rubber sleeve 8 plays a role of high voltage warning.

[0043] A positioning groove 1 is provided on the periphery of the locking nut 10, and a positioning groove 1 and a positioning ring 4 are designed to match it on the first molding mold. The corresponding structure can realize the X / Y / Z three-dimensional positioning of the product to ensure that the plastic structure of the first molding meets the design.

[0044] A plurality of positioning posts 5 are provided on the first filling plastic layer 14, and the positioning posts 5 are embedded in the second filling plastic layer 9. A plurality of positioning posts 5 are designed on the first molded plastic structure to ensure that the first molded plastic structure is centered in the second molded mold, to ensure that the second molded wall thickness is uniform, and to avoid deflection and deformation due to molding pressure.

[0045] A bracket 15 is provided in the first filling plastic layer 14. The bracket 15 is sleeved outside the inner conductor of the main coaxial cable and is provided between the inner conductor and the branch cable 17 to support the inner conductor of the main coaxial cable and the branch cable 17 to prevent the branch cable and the main coaxial cable from being squeezed together due to molding pressure.

[0046] The assembly process of the plastic-sealed splitter in this embodiment includes the following steps:

[0047] S1: Pre-insert the flange 7, the sealing ring 20 and the cable gland 6 into the cut and stripped main coaxial cable;

[0048] S2: The spring collet 11 and the locking nut 10 are pre-assembled together by axial pressure, and then installed at the stripping position of the main coaxial cable for positioning;

[0049] S3: The support tube 13 is buried under the shielding layer of the main coaxial cable and pushed to the stripping position. The conical sleeve 12 is inserted into the inner conductor of the main coaxial cable and inserted between the spring clamp 11 and the locking nut 10, and assembled with the spring clamp 11 and the locking nut 10 to form a locking structure; during the locking process, the wedge-shaped structure of the conical sleeve 12 pushes the spring clamp 11 to move downward, and under the support of the pre-buried support tube 13, the purpose of clamping and conducting the shielding layer 4 of the main coaxial cable is achieved;

[0050] S4: The straight terminal 19 is fixedly connected to the inner conductor 18 of the branch cable through a crimping process, and then the screw at the head of the straight terminal 19 is threadedly connected to the screw hole on the conical sleeve 12 to achieve communication between the shielding layer of the main coaxial cable and the inner conductor 18 of the branch cable;

[0051] S5: Then, insert the bracket 15 onto the inner conductor of the stripped main coaxial cable, and then crimp the inner conductor of the main coaxial cable and the inner conductor 18 of the branch cable with the two ends of the Z-type terminal 16 to achieve the connection between the inner conductor and the branch cable 17; during the installation process, ensure that the Z-type terminal 16 and the straight terminal 19 are staggered by a certain distance in the axial direction;

[0052] S6: putting the components assembled in step S5 into a first molding mold, and injecting hot material of the first filling plastic layer 14 into the first molding mold, and after the hot material is cooled and formed, taking out the first molding mold, and completing the molding of the first filling plastic layer 14;

[0053] S7: Threading is performed on the connection end between the first filling plastic layer 14 and the flange 7, and threading is performed on the connection end of the flange 7;

[0054] S8: Wrap nylon tape 21 around the outer insulation layer of the main coaxial cable close to the first filling plastic layer 14 to prevent the molding material from scalding the outer insulation layer of the main coaxial cable, then assemble and lock the flange 7, gland 6 and sealing ring 20, ensure that the gland 6 presses the nylon tape 21, and apply primer to the flange 7 and the outer periphery of the root of the two branch cables 17, ensure that the flange 7 and the two branch cables 17 are tightly connected to the second filling plastic layer 9, and the flange 7 is threadedly connected to the first filling plastic layer 14 to prevent the hot material from leaking when the hot material is injected into the second filling plastic layer 9;

[0055] S9: putting the components assembled in steps S1-S7 into a secondary molding die, injecting hot material of the second filling plastic layer 9 into the secondary molding die, and after cooling and molding, taking out the secondary molding die, thereby completing the molding of the second filling plastic layer 9;

[0056] S10: Two rubber sleeves 8 are mounted on the molded second filling plastic layer 9 to complete the assembly of the entire plastic-sealed splitter.

[0057] The present invention is fixed to the customer's mechanism through a flange between the client's ends, which is convenient for construction and easy for customers to use. The molding process completely fills the gaps between the parts to achieve insulation, and the electrical performance is better at the same volume. The clamping process is used to achieve power extraction from the shielding layer, and the production process is simple and reliable.

Claims

1. A plastic sealed splitter, characterized in that: The invention comprises a locking nut (10), wherein a shuttle-shaped spring clamp (11) is arranged inside the locking nut (10), wherein the spring clamp (11) and the locking nut (10) are locked by a conical sleeve (12), wherein the conical sleeve (12) is connected to a branch cable (17) by a straight terminal (19), and the locking nut (10) is wrapped with a first filling plastic layer (14); a Z-shaped terminal (16) is arranged inside the first filling plastic layer (14), wherein one end of the Z-shaped terminal (16) is coaxial with the locking nut (10), and the other end is connected to the branch cable (17), and the inner conductor (18) of the main coaxial cable and the branch cable (17) are crimped together with the two ends of the Z-shaped terminal (16); the first filling plastic layer (14) is wrapped with a second filling plastic layer (9), and one end of each of the first filling plastic layer (14) and the second filling plastic layer (9) is fixedly connected to a flange (7) and a cable gland (6); The conical sleeve (12) is clamped in the gap between the spring clamp (11) and the locking nut (10) by applying a lateral force, a support tube (13) is provided in the spring clamp (11), the support tube (13) is clamped and sleeved on the inner insulation layer of the main coaxial cable, and the support tube (13) is buried under the shielding layer of the main coaxial cable.

2. The plastic-sealed splitter according to claim 1, characterized in that: A "T"-shaped groove (3) is provided on the end surface of the flange (7), one end of the second filling plastic layer (9) is embedded in the "T"-shaped groove (3), and a plurality of mutually matching convex teeth (2) and grooves are provided between the first filling plastic layer (14) and the second filling plastic layer (9).

3. The plastic-sealed splitter according to claim 2, characterized in that: A gland (6) is provided inside the flange (7), and a sealing ring (20) is provided between the gland (6) and the flange (7).

4. The plastic-sealed splitter according to claim 3, characterized in that: The second filling plastic layer (9) is covered with a rubber sleeve (8), and the outer surface of the rubber sleeve (8) is provided with a plurality of protrusions.

5. The plastic-sealed splitter according to claim 4, characterized in that: A positioning groove (1) is provided on the periphery of the locking nut (10).

6. The plastic-sealed splitter according to claim 5, characterized in that: A plurality of positioning posts (5) are provided on the first filling plastic layer (14), and the positioning posts (5) are embedded in the second filling plastic layer (9).

7. The plastic-sealed splitter according to claim 6, characterized in that: A bracket (15) is arranged in the first filling plastic layer (14), and the bracket (15) is sleeved outside the insulation layer of the inner conductor of the main coaxial cable, and the bracket (15) is arranged between the insulation layer and the branch cable (17).

8. The plastic-sealed splitter according to claim 7, characterized in that: The connection end of the Z-shaped terminal (16) and the straight terminal (19) are staggered in the axial direction of the main coaxial cable.

9. An assembly process for the plastic-sealed splitter according to claim 8, characterized in that: The following steps are involved: S1: Pre-insert the flange (7), sealing ring (20) and cable gland (6) onto the cut and stripped main coaxial cable; S2: The spring collet (11) and the locking nut (10) are pre-assembled together by axial pressure, and then mounted on the stripping position of the main coaxial cable for positioning; S3: burying the support tube (13) under the shielding layer of the main coaxial cable and pushing it to a predetermined position, inserting the conical sleeve (12) into the main coaxial cable and between the spring clamp (11) and the locking nut (10), and assembling the spring clamp (11) and the locking nut (10) into a locking structure; S4: The straight terminal (19) is connected to the inner conductor (18) of the branch cable by a crimping process, and then the screw on the head of the straight terminal (19) is threadedly connected to the screw hole on the conical sleeve (12), so that the shielding layer of the main coaxial cable is connected to the inner conductor (18) of the branch cable; S5: Then, a support (15) is inserted into the insulation layer of the stripped inner conductor of the main coaxial cable, and then the inner conductor of the main coaxial cable and the inner conductor of the branch cable (18) are crimped together with the two ends of the Z-shaped terminal (16) to achieve the connection between the inner conductor of the main coaxial cable and the inner conductor of the branch cable (18); S6: loading the components assembled in step S5 into a first molding die, and injecting hot material into the first molding die. After the hot material cools down to form a first filling plastic layer (14), the first molding die is removed to complete the molding of the first filling plastic layer (14); S7: A thread is formed on the connection end between the first filling plastic layer (14) and the flange (7), and an internal thread is formed on the connection end of the flange (7); S8: Wrap nylon tape (21) around the outer insulation layer of the main coaxial cable near the first filling plastic layer (14), and then assemble and lock the flange (7), the gland (6) and the sealing ring (20), ensuring that the gland (6) presses the nylon tape (21), the flange (7) is threadedly connected to the first filling plastic layer (14), and apply primer to the outer periphery of the flange (7) and the roots of the two branch cables (17); S9: placing the components assembled in step S8 into a secondary molding die, injecting hot material into the secondary molding die, and after cooling to form a second filling plastic layer (9), taking out the secondary molding die, thereby completing the molding of the second filling plastic layer (9); S10: Two rubber sleeves (8) are mounted on the molded second filling plastic layer (9), thereby completing the assembly of the entire plastic-sealed branching device.

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