Low-temperature cable joint

Abstract

The utility model provides a low-temperature cable joint. The low-temperature cable joint comprises a split structure, a heating layer and a heat preservation layer. Each split body comprises a half shell and a corrugated pipe type expansion joint, and the two half shells are connected through a butt joint opening and fixed through bolts; and a sealing insulation pad and a water-blocking expansion strip are arranged in each half shell, so that the low-temperature sealing performance is improved. The heating layer is arranged in the half shell, and the heat preservation layer is arranged on the outer surface of the half shell. The expansion joint can axially expand and contract to adapt to cable deformation, and a lead port is provided with a sealing layer and a hoop for fixation, so that waterproof and mechanical stability in a low-temperature environment is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable joint technical field, especially a kind of cable joint for low temperature. BACKGROUND

[0002] In low temperature environment, the sealing property and conductive performance of cable joint are susceptible to influence.The conventional cable joint lacks effective heat preservation measures in low temperature environment, and the material has poor environmental adaptability, is difficult to adapt to thermal expansion and contraction caused by temperature change, and is prone to joint loosening or damage. SUMMARY

[0003] Therefore, the main purpose of the utility model is to solve one of the above problems.

[0004] The utility model provides a kind of cable joint for low temperature, comprising: split, heating layer, heat preservation layer;

[0005] The split includes half shell, expansion joint;The half shell includes butt joint, fixed base, sealing ring, sealing insulation pad;One end of the half shell is connected with the expansion joint, the other end of the half shell is provided with the butt joint, the top end and the bottom end of the butt joint are equipped with the fixed base, the butt joint is provided with the sealing ring, the inside of the one end of the half shell connected with the expansion joint is provided with the sealing insulation pad;The end of the expansion joint away from the half shell is provided with lead-in port, the lead-in port is used to pass into and out of cable, the lead-in port is fixed with cable by clamp;The heating layer is arranged in the half shell interior side close to cable, and the heating layer is powered by cable conductor shunt passage;The heat preservation layer is arranged on the outer surface of the half shell;The split has two, and the butt joint of two split abuts each other, and the fixed base between two split is connected by bolt.

[0006] Further, the lead-in port of the expansion joint is provided with sealing layer inside.

[0007] Further, the sealing insulation pad is provided with water-blocking expansion strip close to one end of the expansion joint.

[0008] Further, the expansion joint is axially expandable corrugated tube type expansion joint.

[0009] Further, the heating layer is PTC ceramic heating element.

[0010] Further, the heat preservation layer is microporous foamed EPDM material.

[0011] The utility model has the advantages of the following:

[0012] The corrugated pipe expansion joint can absorb cable axial expansion, avoids joint cracking due to low temperature contraction or mechanical vibration; the built-in heating layer cable shunt passage is self-powered, realizes anti-freezing; the external heat preservation layer can reduce heat loss, improves low temperature environment adaptability. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a low temperature cable joint structure schematic diagram of the utility model;

[0014] Figure 2 It is a split schematic diagram of the utility model;

[0015] 1, split; 101, half shell; 1011, butt joint; 1012, fixed seat; 1013, sealing ring; 1014, sealing insulating pad; 1015, water blocking expansion strip; 102, expansion joint; 1021, lead port; 1022, sealing layer; 2, heating layer; 3, heat preservation layer. DETAILED DESCRIPTION

[0016] The application will be described in further detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and not to limit the utility model. In addition, it should be noted that, for the convenience of description, only the parts related to the utility model are shown in the drawings. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0017] In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance, in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. The application will be described in detail below with reference to the drawings and embodiments.

[0018] As Figure 1As shown in the preferred embodiment of the utility model, a low-temperature cable joint comprises: a split body 1, a heating layer 2, and a heat preservation layer 3.

[0019] As shown in the preferred embodiment of the utility model, a low-temperature cable joint comprises: a split body 1, a heating layer 2, and a heat preservation layer 3. Figure 2 As shown, the split body 1 comprises a half shell 101 and an expansion joint 102; the half shell 101 comprises a butt joint 1011, a fixing seat 1012, a sealing ring 1013, and a sealing insulation pad 1014; one end of the half shell 101 is connected to the expansion joint 102, the other end of the half shell 101 is provided with the butt joint 1011, the top end and the bottom end of the butt joint 1011 are both provided with the fixing seat 1012, the butt joint 1011 is provided with the sealing ring 1013, and the inside of the end of the half shell 101 connected to the expansion joint 102 is provided with the sealing insulation pad 1014; the end of the expansion joint 102 away from the half shell 101 is provided with a lead wire port 1021, the lead wire port 1021 is used for penetrating into and out of the cable, and the lead wire port 1021 is fixed to the cable through a clamp; the expansion joint 102 can compensate for the deformation of the cable caused by low-temperature shrinkage or mechanical stress, thereby avoiding cracking of the joint due to tension or pressure.

[0020] As shown in the preferred embodiment of the utility model, a low-temperature cable joint comprises: a split body 1, a heating layer 2, and a heat preservation layer 3. Figure 2 As shown, the heating layer 2 is arranged inside the half shell 101 near one side of the cable, the heating layer 2 is powered through a cable conductor shunt passage, the temperature inside the joint is maintained above the freezing point, and condensate water is prevented from freezing to cause a decrease in insulation performance.

[0021] As shown in the preferred embodiment of the utility model, a low-temperature cable joint comprises: a split body 1, a heating layer 2, and a heat preservation layer 3. Figure 2 As shown, the heat preservation layer 3 is arranged on the outer surface of the half shell 101 to reduce heat loss and improve the energy efficiency of the heating layer.

[0022] The split body 1 has two, the butt joints 1011 of the two split bodies 1 abut each other, and the fixing seats 1012 of the two split bodies 1 are connected through the bolts, so that the joint is easy to install and maintain, and the cable joint is provided with basic protection.

[0023] As a preferred embodiment of the utility model, the following additional technical features can also be provided:

[0024] As shown in the preferred embodiment of the utility model, a low-temperature cable joint comprises: a split body 1, a heating layer 2, and a heat preservation layer 3. Figure 2 As shown in a preferred embodiment, the inside of the lead wire port 1021 of the expansion joint 102 is provided with a sealing layer 1022, which further blocks water vapor from penetrating into the joint from the gap between the cable and the lead wire port 1021, thereby preventing the joint from being damaged by ice expansion.

[0025] As shown in the preferred embodiment of the utility model, a low-temperature cable joint comprises: a split body 1, a heating layer 2, and a heat preservation layer 3. Figure 2As shown, in a preferred embodiment, the sealing and insulating pad 1014 is provided with a water-blocking expansion strip 1015 near one end of the expansion joint 102, which automatically expands to fill the gap when water is encountered, thereby blocking the ingress of water vapor along the axial direction of the cable, and is particularly suitable for use in snowmelt or humid and cold environments.

[0026] In a preferred embodiment, the expansion joint 102 is an axially expandable corrugated tube expansion joint, in which the corrugated tube structure connects the half shell and the cable to allow axial expansion deformation, and the corrugated tube design enhances the fatigue resistance of the joint and adapts to repeated freeze-thaw cycles in extremely cold regions.

[0027] In a preferred embodiment, the heating layer 2 is a PTC ceramic heating element, and the PTC material has a self-regulating temperature property, in which the resistance of the PTC material automatically increases with temperature rise, thereby preventing overheating and ensuring energy saving and safety.

[0028] In a preferred embodiment, the heat preservation layer 3 is a microporous foamed EPDM material, which has a low thermal conductivity that can effectively reduce heat loss, and excellent weather resistance that can resist ultraviolet light, ozone and extreme low temperature aging, thereby prolonging the service life of the joint. The basic principles and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A cable joint for low temperature use, characterized in that Include: Split (1), heating layer (2), heat preservation layer (3); The split (1) includes a half shell (101), an expansion joint (102); The half shell (101) includes a docking interface (1011), a fixed seat (1012), a sealing ring (1013), a sealing insulation pad (1014); The half shell (101) is connected with the expansion joint (102) at one end, the other end of the half shell (101) is provided with the docking interface (1011), the docking interface (1011) is provided with the fixed seat (1012) at the top and bottom, the docking interface (1011) is provided with the sealing ring (1013), the half shell (101) is provided with the sealing insulation pad (1014) inside the end connected with the expansion joint (102); The end of the expansion joint (102) away from the half shell (101) is provided with a lead port (1021), the lead port (1021) is used for penetrating into and out of the cable, and the lead port (1021) is fixed with the cable through a clamp; The heating layer (2) is arranged inside the half shell (101) close to one side of the cable, and the heating layer (2) is powered through a cable conductor shunt passage; The heat preservation layer (3) is arranged on the outer surface of the half shell (101); The split (1) has two, and the docking interfaces (1011) of the two splits (1) abut each other, and the fixed seats (1012) of the two splits (1) are provided with bolts and are connected through the bolts.

2. The cable joint for low temperature according to claim 1, wherein, The lead port (1021) of the expansion joint (102) is provided with a sealing layer (1022) inside.

3. The cable joint for low temperature according to claim 1, wherein, The sealing insulation pad (1014) is provided with a water blocking expansion strip (1015) close to one end of the expansion joint (102).

4. The cable joint for low temperature according to claim 1, wherein, The expansion joint (102) is a corrugated pipe type expansion joint which can be axially expanded.

5. The cable joint for low temperature according to claim 1, wherein, The heating layer (2) is a PTC ceramic heating element.

6. The cable joint for low temperature according to claim 1, wherein, The heat preservation layer (3) is a microporous foamed EPDM material.

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