Temporary fixing device for cable joint

Abstract

The utility model discloses a cable joint temporary fixing device which comprises a base, a cross arm is installed on the base, and second clamping mechanisms used for clamping a cable are installed at the two ends of the cross arm. The cross arm is movably connected with the base in a lockable mode, and any second clamping mechanism is movably connected with the cross arm in a lockable mode. According to the utility model, the double-ball joint is used as a movable connecting unit for angle adjustment, so that the device has the characteristics of large adjustable range, multiple adjustable angles and good temporary supporting performance; when a cable joint is welded, support can be effectively provided, existing personnel assistance is replaced, and the stability is improved; and meanwhile, single-person operation can be achieved, and operation human resource investment is reduced.

Description

Technical Field

[0001] This utility model relates to the field of power cable installation technology, and more particularly to the field of cable connection auxiliary device technology, specifically a temporary fixing device for cable joints. Background Technology

[0002] Cable splicing is a frequent task in the power installation industry and a major source of cable safety hazards. During initial installation or subsequent modifications, cable splicing is unavoidable, including tasks like wire bonding, branching, and replacement. Existing cable splicing methods typically include twisting and winding, spiral winding, wire capping, and terminal block methods. While these are commonly used, due to increasingly stringent electrical safety standards and the prevalence of underground cabling, conventional methods are insufficient to meet current wiring requirements and can easily create safety hazards. This is especially true for existing armored cables, where these methods are not effective or secure enough for proper connection. To improve the stability and subsequent safety of cable splicing, this applicant proposes a splicing method combining twisting or crimping with welding. Compared to existing methods, this method offers greater stability and conductivity, eliminating the risk of electrical sparks due to poor contact. This significantly reduces the probability of leaks and fires caused by overheating and increased internal resistance at the cable splice, thus improving overall safety.

[0003] The most critical step in ensuring the stability of cable joint connections is welding. During cable welding, the joint must be kept stable, especially when welding in mid-air. This requires assistance from at least one person to support the joint while another welds. However, if the welding is done in mid-air, it's necessary to perform welding below the wires, completing welding and insulation before reconnecting, which is very inefficient. For later-stage renovation projects, sometimes removing the wires is very difficult, necessitating welding in mid-air. To address this issue, this invention proposes a temporary cable joint fixing device for temporarily securing the cable joint and facilitating welding. Utility Model Content

[0004] To address the problem of welding and fixing cable joints, this application provides a temporary cable joint fixing device for temporarily securing cable joints, particularly for temporary fixing during welding of armored cable cores after winding. With this device, the connection and welding of cable joints can be reduced from requiring two people to a single operator, and the cable joints exhibit good stability during welding, capable of being fixed on the ground and in suspended states. Because this device can be fixed to other suspended cables or load-bearing steel wire ropes using its own structure, it eliminates the need for downlining operations when upgrading or rewiring old lines, thus improving wiring efficiency, operability, and convenience. It provides significant assistance and practicality for cable joint processing.

[0005] To achieve the temporary fixing function of the cable joint, the technical solution provided by this utility model is as follows:

[0006] A temporary cable joint fixing device includes a base with a cross arm mounted on it. Second clamping mechanisms for holding cables are mounted at both ends of the cross arm. The cross arm and the base are connected by a lockable movable connection, and each of the second clamping mechanisms is also connected to the cross arm by a lockable movable connection. The base serves as the supporting structure for the entire fixing device. The lockable movable connection between the base and the cross arm allows for flexible adjustment of the cross arm's position and angle, thus meeting the angle and position requirements for fixing the cable joint in different scenarios. Furthermore, the second clamping mechanism for holding the cable is also connected to the cross arm by a lockable movable connection. The purpose of using lockable movable connections in both of these locations is to improve the overall adjustability of the device, thereby more flexibly meeting diverse fixing needs. The lockability improves structural stability; for example, after adjusting the angle, the joint can be fixed, and then welding can begin. The movable connection allows for better adjustment of the required angle. Combining the lockability and movable connection allows the structure to balance the convenience of adjustment with improved fixing stability.

[0007] Preferably, the device further includes a second joint disposed between the second clamping mechanism and the cross arm. The second joint comprises two parallel plates, with spherical components clamped between the two plates near their ends. An adjustable fastener for clamping the spherical components is disposed through the middle of the two plates. One side of the spherical component is fixedly connected to one end of the cross arm, and the other side of the spherical component is fixedly connected to one end of a connector. The other end of the connector is detachably fixedly connected to the second clamping mechanism.

[0008] To further enhance the stability of the second joint in a fixed state, preferably, the plate has a groove for accommodating the spherical component on the side near the spherical component, and the groove contains an elastic material to increase friction. By increasing friction through the elastic material, the spherical component becomes more stable under the fastening force of the fastener, allowing the cable connector to be adjusted at any angle and maintained at that angle, facilitating connector welding.

[0009] Furthermore, the elastic material is rubber or silicone rubber.

[0010] To further enhance the flexibility of this invention and provide a wider range of angle adjustments, preferably, it also includes a first joint and a locking device movably connected between the cross arm and the base. The first joint has the same structure as the second joint. The locking device has a groove or through hole for accommodating the cross arm, and an adjustable component for locking the cross arm. The adjustable component can be a bolt-locking structure capable of clamping the cross arm located in the groove or through hole, a screw structure threaded into the locking device housing, or any other structure capable of forming a snap-fit ​​fixation with the cross arm, as long as it can achieve the switching / adjustment of the cross arm between fixed and loose states.

[0011] To further enhance the stability of the crossarm and compensate for the potential lack of sufficient support from the first joint alone, this solution also includes at least one first flexible shaft on the base for connecting the locking device. The first flexible shaft can be an existing supportive metal-armored flexible shaft, or a flexible shaft with a steel wire braid and composite material filling. Utilizing the static support and flexibility of the flexible shaft, the support for the crossarm is further enhanced without affecting angle adjustment, thereby improving the support stability during cable joint welding.

[0012] Preferably, the second clamping mechanism includes two hinged half-clamps and a torsion spring disposed on the hinge axis to apply a closing elastic force to the half-clamps. Each of the half-clamps has multiple arc-shaped grooves of different radii on its clamping side, with the arc-shaped grooves closer to the hinge axis having smaller radii. The purpose of providing arc-shaped grooves of different radii is twofold: firstly, to accommodate cables of different diameters; and secondly, to improve clamping stability and protect the cable surface.

[0013] Furthermore, preferably, the surface of the arc-shaped groove is covered with an anti-slip and toughening material. The anti-slip and toughening material helps protect the cable surface and prevents damage to the cable armor at the clamping point.

[0014] More preferably, to improve the insulation of the cable joint, a waterproof joint sleeve needs to be installed on the cable joint. Both ends of the joint sleeve need to be thermoplastically sealed. The sleeve melts when heated, reaching very high temperatures, making it impossible to fix the ends by hand. A clamp is needed to hold the heated and deformed sleeve, ensuring complete adhesion to the internal cable and forming a sealed structure. Therefore, the base of this invention is also equipped with two second flexible shafts. Each second flexible shaft has a third clamping mechanism installed at its free end for clamping the cable. The third clamping mechanism includes a connecting seat for detachable connection with the second flexible shaft, and arc-shaped arms fixedly connected to the connecting seat and symmetrically arranged. The free end of each arc-shaped arm has a cylindrical enlarged end, and an open spring plate that engages with the cylindrical enlarged end to maintain a stable clamping force between the two arc-shaped arms. A reinforcing part is also fixedly installed on each arc-shaped arm, extending outward from the end near the connecting seat to form a protrusion that facilitates the outward opening of the arc-shaped arm. After the connector sleeve is heat-fused, the third clamping mechanism is directly clamped onto the connector sleeve. Utilizing the excellent wrapping properties of the arc-shaped arm, the heat-fused portion of the connector sleeve is completely clamped. Further securing is achieved with snap-fit ​​spring clips until the connector sleeve cools and sets. This eliminates the need for manual clamping and requires no multiple people. Only one person is needed to complete the operation, significantly reducing the manpower required for cable joint welding and sealing, and greatly improving operational convenience.

[0015] To expand the application scenarios of this utility model, preferably, the bottom of the base is further provided with multiple first clamping mechanisms, the structure of which is the same as that of the third clamping mechanism. For suspension applications, the first clamping mechanisms can be used to clamp and fix the cable to an existing cable, cable support cable, or utility pole cable bracket structure, and then the second clamping mechanism can be used to fix the cable joint to be processed, thus realizing multi-scenario applications.

[0016] Beneficial effects:

[0017] This utility model adopts a double ball joint as a movable connection unit for angle adjustment, which has the characteristics of large adjustable range, multiple adjustable angles, and good temporary support. When welding cable joints, it can effectively provide support, replace the existing personnel assistance, and improve stability. At the same time, it can be operated by a single person, reducing the input of human resources for operation.

[0018] This utility model is equipped with a third clamping mechanism for holding the heat fusion joint sleeve, which can exert a stable and continuous clamping force on the high-temperature joint sleeve end, quickly shaping the heat fusion sleeve joint without the need for other auxiliary tools. It is simple and convenient to operate. Compared with the existing methods where operators wear gloves and pinch by hand or use auxiliary clamps for manual clamping, it has significant improvements in stability, safety and appearance regularity. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is the structural isometric drawing of this utility model.

[0021] Figure 2 yes Figure 1 A bottom view.

[0022] Figure 3 yes Figure 1 A schematic diagram of the situation when suspended at a high altitude.

[0023] Figure 4 yes Figure 1 The main view.

[0024] Figure 5 yes Figure 4 Enlarged view of the structure in area A.

[0025] Figure 6 yes Figure 4 Enlarged view of the structure in area B.

[0026] 1-Base; 11-First flexible shaft; 2-First clamping mechanism; 3-First joint; 4-Locking device; 5-Horizontal arm; 6-Second joint; 61-Sheet metal; 62-Spherical component; 63-Fastener; 64-Connector; 7-Second clamping mechanism; 8-Second flexible shaft; 9-Third clamping mechanism; 91-Connecting seat; 92-Arc-shaped arm; 93-Cylindrical enlarged end; 94-Protrusion; 95-Reinforcing part; 96-Open spring sheet; 100-In-service cable; 200-Connecting cable. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0032] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] Example 1:

[0034] See the instruction manual appendix Figure 1As shown, this embodiment provides a temporary cable joint fixing device, including a base 1, on which a cross arm 5 is mounted. Second clamping mechanisms 7 for clamping cables are mounted at both ends of the cross arm 5. The cross arm 5 and the base 1 are connected by a lockable movable connection, and each of the second clamping mechanisms 7 is also connected to the cross arm 5 by a lockable movable connection. The base 1 is the supporting structure of the entire fixing device. The lockable movable connection between the base 1 and the cross arm 5 allows for flexible adjustment of the position and angle of the cross arm 5, thereby meeting the angle and position requirements for fixing the cable joint in different scenarios. Furthermore, the second clamping mechanism 7 for clamping the cable is also connected to the cross arm 5 by a lockable movable connection. The purpose of using lockable movable connections in both of these locations is to improve the overall adjustability of the device, thereby more flexibly meeting diverse fixing needs. The lockability improves structural stability; for example, after adjusting the angle, the joint can be fixed, and then welding can begin. The movable connection allows for better adjustment of the required angle. Combining the lockability and the movable connection allows the structure to balance the convenience of adjustment with improved fixing stability.

[0035] Example 2:

[0036] This embodiment is a further optimization of the structure based on Embodiment 1. See the appendix of the instruction manual for details. Figures 1-6 As shown, it also includes a second joint 6 disposed between the second clamping mechanism 7 and the cross arm 5. The second joint 6 includes two parallel plates 61. Spherical parts 62 are clamped between the two plates 61 near their ends. An adjustable fastener 63 for clamping the spherical parts 62 is disposed through the middle of the two plates 61. One side of the spherical part 62 is fixedly connected to one end of the cross arm 5, and the other side of the spherical part 62 is fixedly connected to one end of the connector 64. The other end of the connector 64 is detachably fixedly connected to the second clamping mechanism 7.

[0037] To improve the stability of the second joint 6 in a fixed state, in this embodiment, the plate 61 has a groove for accommodating the spherical component 62 on the side near the spherical component 62, and an elastic material for increasing friction is disposed in the groove. By increasing friction through the elastic material, the spherical component 62 becomes more stable under the fastening force of the fastener 63. This allows the cable connector to be adjusted at any angle and maintained at that angle, facilitating connector welding. In this embodiment, the elastic material is rubber or silicone rubber.

[0038] To further enhance the flexibility of this invention and provide a wider range of angle adjustments, this embodiment also includes a first joint 3 and a locking device 4 movably connected between the cross arm 5 and the base 1. The first joint 3 has the same structure as the second joint 6. The locking device 4 is provided with a groove or through hole for accommodating the cross arm 5, and an adjustable component for locking the cross arm 5. The adjustable component can be a bolt-locking structure capable of clamping the cross arm 5 located in the groove or through hole, a screw structure threaded into the housing of the locking device 4, or any other structure capable of forming a snap-fit ​​fixation with the cross arm 5, as long as it can achieve the switching / adjustment of the cross arm 5 between fixed and loose states.

[0039] Example 3:

[0040] To further enhance the stability of the cross arm 5 and compensate for the insufficient support force that may exist if only the first joint 3 is used for support, this embodiment also provides at least one first flexible shaft 11 on the base 1 for connecting the locking device 4. The first flexible shaft 11 can be an existing supportive metal-armored flexible shaft, or a flexible shaft with a steel wire braid and composite material filling. By utilizing the static support and flexibility of the flexible shaft, the support for the cross arm 5 is further enhanced without affecting the angle adjustment, thereby improving the support stability during cable joint welding.

[0041] Example 4:

[0042] This embodiment further optimizes upon embodiments 2-3 described above. Specifically, the second clamping mechanism 7 includes two hinged half-clamps and a torsion spring mounted on the hinge axis to apply a closing elastic force to the half-clamps. Each of the half-clamps has multiple arc-shaped grooves of different radii on its clamping side, with the radius of the arc-shaped grooves closer to the hinge axis being smaller. The purpose of setting arc-shaped grooves of different radii is twofold: firstly, to accommodate cables of different diameters; and secondly, to improve clamping stability and protect the cable surface.

[0043] Furthermore, in this embodiment, the surface of the arc-shaped groove is covered with an anti-slip and toughening material. The anti-slip and toughening material helps protect the cable surface and prevents damage to the cable armor at the clamping point.

[0044] More preferably, in order to improve the insulation of the cable joint, a waterproof joint sleeve needs to be installed on the cable joint. The two ends of the joint sleeve need to be thermoplastically sealed. The sleeve melts when heated, and the temperature is very high. It is impossible to fix the two ends of the sleeve by hand. A clamp is needed to hold the sleeve that has been heated and deformed, so that it is completely bonded to the internal cable to form a sealed structure. To this end, the base 1 of this utility model is also provided with two second flexible shafts 8, and the free end of each second flexible shaft 8 is equipped with a third clamping mechanism 9 for clamping cables; the third clamping mechanism 9 includes a connecting seat 91 for detachably connecting with the second flexible shaft 8, an arc-shaped arm 92 fixedly connected to the connecting seat 91 and symmetrically arranged, the free end of the arc-shaped arm 92 is provided with a cylindrical enlarged end 93, and an open spring plate 96 that cooperates with the cylindrical enlarged end 93 to lock together so that the two arc-shaped arms 92 can maintain a stable clamping force, and a reinforcing part 95 is also fixedly provided on the arc-shaped arm 92, the reinforcing part 95 extending outward from the end near the connecting seat 91 to form a protrusion 94 that facilitates the outward opening of the arc-shaped arm 92. After the connector sleeve is heat-fused, the third clamping mechanism 9 is directly clamped onto the connector sleeve. Utilizing the excellent wrapping properties of the arc-shaped arm 92, the heat-fused portion of the connector sleeve is completely clamped. This is further secured by the snap-on spring plate 96 until the connector sleeve cools and sets. This eliminates the need for manual clamping and multiple personnel; only one person is required, significantly reducing manpower investment in cable connector welding and sealing, and improving operational convenience. During use, simply pinching the protrusion 94 by hand overcomes the torsion spring's elasticity to open the arc-shaped arm 92 for clamping. After release, the arc-shaped arm 92 naturally clamps onto the softened or melted connector sleeve. To provide better clamping force, the open spring plate 96 further clamps the arc-shaped arm 92. Figure 6 As shown. The cylindrical enlarged end 93 set at the free end of the arc arm 92 can effectively improve the clamping stability of the open spring plate 96 and prevent clamping dislodgement.

[0045] To expand the application scenarios of this utility model, in this embodiment, the bottom of the base 1 is also provided with multiple first clamping mechanisms 2, the structure of which is the same as that of the third clamping mechanism 9. For suspension applications, the first clamping mechanisms 2 can be used to clamp the cable onto an existing cable, cable support cable, or power pole cable bracket structure for fixation, and then the second clamping mechanism 7 can be used to fix the cable connector to be processed, thus realizing multi-scenario applications.

[0046] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A temporary fixing device for cable joints, characterized in that: The system includes a base (1), on which a cross arm (5) is mounted. Second clamping mechanisms (7) for clamping cables are mounted at both ends of the cross arm (5). The cross arm (5) and the base (1) are connected by a lockable movable connection, and each of the second clamping mechanisms (7) is connected to the cross arm (5) by a lockable movable connection. The base (1) also has two second flexible shafts (8), and each of the second flexible shafts (8) has a third clamping mechanism (9) for clamping cables mounted at its free end. The third clamping mechanism (9) includes mechanisms for clamping cables and for clamping cables. The shaft (8) is detachably connected to the connecting seat (91), and the arc-shaped arm (92) is fixedly connected to the connecting seat (91) and symmetrically arranged. The free end of the arc-shaped arm (92) is provided with a cylindrical enlarged end (93) and an open spring plate (96) that cooperates with the cylindrical enlarged end (93) to make the two arc-shaped arms (92) maintain a stable clamping force. The arc-shaped arm (92) is also fixedly provided with a reinforcing part (95). The reinforcing part (95) extends outward from the end near the connecting seat (91) to form a protrusion (94) that facilitates the arc-shaped arm (92) to open outward.

2. The temporary fixing device for a cable joint according to claim 1, characterized in that: It also includes a second joint (6) disposed between the second clamping mechanism (7) and the cross arm (5). The second joint (6) includes two parallel plates (61). A spherical part (62) is clamped between the two plates (61) near both ends. An adjustable fastener (63) for clamping the spherical part (62) is disposed through the middle of the two plates (61). One side of the spherical part (62) is fixedly connected to one end of the cross arm (5), and the other side of the spherical part (62) is fixedly connected to one end of the connector (64). The other end of the connector (64) is detachably fixedly connected to the second clamping mechanism (7).

3. A temporary fixing device for a cable joint according to claim 2, characterized in that: The plate (61) has a groove for accommodating the spherical part (62) on the side near the spherical part (62), and the groove is provided with an elastic material for increasing friction.

4. A temporary fixing device for a cable joint according to claim 3, characterized in that: The elastic material is rubber or silicone rubber.

5. A temporary fixing device for a cable joint according to claim 2, characterized in that: It also includes a first joint (3) and a locking device (4) that are movably connected between the cross arm (5) and the base (1). The first joint (3) has the same structure as the second joint (6). The locking device (4) is provided with a groove or through hole for accommodating the cross arm (5) and an adjustable member for locking the cross arm (5).

6. A temporary fixing device for a cable joint according to claim 5, characterized in that: The base (1) is also provided with at least one first flexible shaft (11) for connecting the locking device (4).

7. A temporary fixing device for a cable joint according to claim 2, characterized in that: The second clamping mechanism (7) includes two hinged half clamps and a torsion spring provided on the hinge axis to apply a closing elastic force to the half clamps. Each of the half clamps is provided with multiple arc-shaped grooves of different radii on the clamping side, and the arc-shaped grooves closer to the hinge axis have smaller radii.

8. A temporary fixing device for a cable joint according to claim 7, characterized in that: The surface of the arc-shaped groove is covered with a non-slip and tough material.

9. A temporary fixing device for a cable joint according to claim 1, characterized in that: The base (1) is also provided with a plurality of first clamping mechanisms (2) at its bottom, and the structure of the first clamping mechanism (2) is the same as that of the third clamping mechanism (9).

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