Dry-type outdoor terminal

Abstract

The utility model belongs to the technical field of cables, and particularly relates to a dry-type outdoor terminal, which comprises an outer insulator, a conducting rod sleeved in the outer insulator, a cable penetrating through the conducting rod, a stress cone used for fixing the cable and a tail pipe arranged at the bottom of the outer insulator, the end part of the external insulation is also provided with a waterproof top plate, and the top plate is provided with a wiring terminal which is conducted with the end part of the cable. Liquid insulation media do not need to be filled, external insulation completely serves as electrical insulation, liquid insulation is prone to chemical reaction under high voltage to be decomposed into other impurities, and therefore electrical stability is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of cables, and in particular relates to a dry outdoor terminal. Background Art

[0002] The outdoor terminals of power cables usually use oil-filled terminals, but there are some problems:

[0003] 1. If Figure 1 As shown, oil filling generally refers to a liquid medium with electrical insulation. There is often a problem of oil leakage, which leads to reduced insulation performance inside the product, and subsequently leads to electrical accidents, resulting in power outages in the main transmission line, and huge economic losses;

[0004] 2. There is a large internal oil filling space requirement, so the design structure is large and the cost is high;

[0005] 3. The overall surface of the cable insulation must be smooth. If there are defects, it is easy to cause partial discharge and bring the risk of reduced electrical life;

[0006] 4. When placed in an open outdoor environment for a long time, high sealing performance is required for the top. If the sealing is poor and rainwater enters, the performance of the cable insulation and liquid insulating medium may drop sharply, bringing the risk of reduced electrical life. Utility Model Content

[0007] In order to solve the above technical problems, the utility model provides a dry outdoor terminal.

[0008] It comprises an outer insulation, a conductive rod sleeved in the outer insulation, a cable arranged through the conductive rod, a stress cone for fixing the cable, and a tail pipe arranged at the bottom of the outer insulation, wherein:

[0009] The outer insulating end is also provided with a top plate suitable for waterproofing, and a connection terminal connected to the end of the cable is installed on the top plate.

[0010] Furthermore, the top plate extends downward with a flange to form a mounting cavity, the outer insulation is arranged in the mounting cavity, and a mounting hole is opened on the top plate, wherein:

[0011] The size of the mounting hole matches the size of the wiring terminal.

[0012] Furthermore, a sealing ring is also provided on the top plate to ensure that the wiring terminal is sealed and connected to the top plate.

[0013] Furthermore, the stress cone includes a body, an insulating rubber disposed above the body, and a spring pressure plate disposed at the lower end of the body, wherein:

[0014] One end of the spring pressure plate abuts against the insulating rubber, and the other end is fixed to the bottom of the outer insulation.

[0015] Furthermore, two sides of the cross section of the body are arc-shaped, and the body is made of conductive rubber.

[0016] Further, the spring pressure plate includes a fixing plate fixedly arranged on the outer insulating bottom, a top rod slidably arranged on the fixing plate, a fin arranged on the top rod and a spring sleeved on the top rod, wherein:

[0017] One end of the spring abuts against the fixing plate, and the other end abuts against the fin;

[0018] The push rod abuts against the insulating rubber.

[0019] Furthermore, a bottom plate is provided at the bottom of the outer insulation, and the fixing plate is fixedly arranged on the bottom plate.

[0020] Furthermore, the tail pipe is fixedly arranged on the fixing plate.

[0021] Furthermore, the bottom of the conductive rod abuts against the top of the insulating rubber.

[0022] Furthermore, the connection terminal is electrically connected to a conductor of the cable.

[0023] The beneficial effects of the utility model are:

[0024] 1. No need to fill liquid insulating medium, and the electrical insulation is completely based on external insulation. Liquid insulation is prone to chemical reaction and decomposition into other impurities under high voltage, so the electrical stability is better;

[0025] 2. Simple installation. The cable insulation only needs to be polished at the interface with the stress cone. The overall length of the outdoor terminal is generally more than 1m, which greatly improves the installation efficiency.

[0026] 3. Small size, lower cost and more convenient transportation.

[0027] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by implementing the present invention.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a schematic diagram of the installation of the prior art of the utility model;

[0031] Figure 2 This is a schematic diagram of the dry outdoor terminal structure of the utility model;

[0032] Figure 3 It is a schematic diagram of the conductive rod structure of the utility model;

[0033] Figure 4 It is a schematic diagram of the external insulation structure of the utility model;

[0034] Figure 5 It is a schematic diagram of the stress cone structure of the utility model;

[0035] Figure 6 It is a schematic diagram of the structure of the spring pressure plate of the utility model;

[0036] Figure 7 It is a schematic diagram of the tail pipe structure of the utility model;

[0037] Figure 8 It is a schematic diagram of the top plate structure of the utility model;

[0038] Fig. 9 It is a schematic diagram of the bottom plate structure of the utility model;

[0039] Fig.10 It is a schematic diagram of the cable structure of the utility model;

[0040] Fig.11 It is a schematic diagram of the wiring terminal structure of the utility model.

[0041] In the figure:

[0042] 100, external insulation, 110, conductive rod, 120, cable, 121, conductor, 122, cable insulation, 123, cable outer semiconductor, 124, metal sheath, 125, cable outer sheath, 130, stress cone, 131, body, 132, insulating rubber, 133, spring, 134, fixing plate, 135, top rod, 136, fin, 140, tail pipe, 150, top plate, 151, flange, 152, sealing ring, 153, mounting hole, 160, terminal block, 170, bottom plate. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] Example 1

[0045] like Figure 1 As shown, the dry outdoor terminal of this embodiment includes an outer insulation 100, a conductive rod 110 sleeved in the outer insulation 100, a cable 120 arranged through the conductive rod 110, a stress cone 130 for fixing the cable 120, and a tail pipe 140 arranged at the bottom of the outer insulation 100, wherein a top plate 150 suitable for waterproofing is also provided at the end of the outer insulation 100, and a connection terminal 160 connected to the end of the cable 120 is installed on the top plate 150. The outer insulation 100 is used as a solid insulation to prevent the liquid insulation from chemically reacting and decomposing into other impurities under high voltage. The cable 120 includes a conductor 121, a cable insulation 122 coated on the outside of the conductor 121, a cable outer semiconductor 123 at the bottom of the cable insulation 122, a metal sheath 124 sleeved on the cable outer semiconductor 123, and a cable outer sheath 125 sleeved on the metal sheath 124. The terminal block 160 is connected to the conductor 121 of the cable 120, and the cable 120 is arranged through the outer insulation 100 and the tail tube 140. The bottom cavity of the terminal block 160 is used to connect the conductor 121 of the cable 120, and the top is connected to the equipment terminal, which plays a role in continuous current transmission. The conductive rod 110 is located inside the outer insulation 100, and is made of a light metal material with characteristics such as light material, high conductivity, low cost, and high strength, such as aluminum alloy. The inside of the conductive rod 110 is a cavity, and when the cable 120 is installed, the cable 120 only needs to be inserted from the bottom; the bottom of the conductive rod 110 is a bell-mouth structure, which is used to reduce the electric field strength; the outer insulation 100 is an insulating material with strong hydrophobicity (such as epoxy resin).

[0046] The top plate 150 extends downward with a flange 151 to form a mounting cavity. The size of the mounting cavity is adapted to the outer diameter of the outer insulation 100, so that the outer insulation 100 is arranged in the mounting cavity. The top plate 150 is provided with a mounting hole 153, wherein the size of the mounting hole 153 is adapted to the size of the wiring terminal 160. The wiring terminal 160 passes through the mounting hole 153 to connect with the device terminal.

[0047] In order to improve the sealing between the connection terminal 160 and the top plate 150 and prevent rainwater from entering, a sealing ring 152 is further provided on the top plate 150 to ensure that the connection terminal 160 is sealed and connected to the top plate 150 .

[0048] The stress cone 130 includes a body 131, an insulating rubber 132 disposed above the body 131, and a spring 133 pressure plate disposed at the lower end of the body 131, wherein one end of the spring 133 pressure plate abuts against the insulating rubber 132, and the other end is fixed to the bottom of the outer insulation 100. The stress cone 130 is used to evacuate the electric field at the outer semiconductor 123 port of the cable and enhance the electrical insulation of the dry terminal sleeve. The spring 133 pressure plate can continuously provide pressure to the body 131 and the insulating rubber 132. The two sides of the cross section of the body 131 are arc-shaped to ensure the interface matching pressure of the stress cone 130 with the outer insulation 100 and the conductive rod 110. The material of the body 131 is conductive rubber.

[0049] The spring 133 pressure plate includes a fixing plate 134 fixedly arranged at the bottom of the outer insulation 100, a top rod 135 slidably arranged on the fixing plate 134, a fin 136 arranged on the top rod 135, and a spring 133 sleeved on the top rod 135, wherein one end of the spring 133 abuts against the fixing plate 134, and the other end abuts against the fin 136; the top rod 135 abuts against the insulating rubber 132. The force of the spring 133 enables the top rod 135 to always abut against the body 131 to provide continuous pressure.

[0050] The bottom of the outer insulation 100 is provided with a bottom plate 170, the fixing plate 134 is fixedly arranged on the bottom plate 170; the tail pipe 140 is fixedly arranged on the fixing plate 134. The tail pipe 140 is used to connect with the metal sheath 124 of the cable 120, and the seven-fold sealing cable 120 and the electric metal sheath 124 are grounded.

[0051] The bottom of the conductive rod 110 abuts against the top of the insulating rubber 132. The conductive rod 110 contacts the insulating rubber 132 to ensure the downward pressure of the insulating rubber 132. The top plate 150 extends downward with a flange 151 to form a mounting cavity. The size of the mounting cavity is adapted to the outer diameter of the outer insulation 100 so that the outer insulation 100 can be arranged in the mounting cavity. The top plate 150 is provided with a mounting hole 153, wherein the size of the mounting hole 153 is adapted to the size of the wiring terminal 160. The wiring terminal 160 passes through the mounting hole 153 to connect with the device terminal.

[0052] In order to improve the sealing between the connection terminal 160 and the top plate 150 and prevent rainwater from entering, a sealing ring 152 is further provided on the top plate 150 to ensure that the connection terminal 160 is sealed and connected to the top plate 150 .

[0053] The stress cone 130 includes a body 131, an insulating rubber 132 disposed above the body 131, and a spring 133 pressure plate disposed at the lower end of the body 131, wherein one end of the spring 133 pressure plate abuts against the insulating rubber 132, and the other end is fixed to the bottom of the outer insulation 100. The stress cone 130 is used to evacuate the electric field at the outer semi-conducting port of the cable 120 and enhance the electrical insulation of the dry terminal sleeve. The spring 133 pressure plate can continuously provide pressure to the body 131 and the insulating rubber 132. The two sides of the cross section of the body 131 are arc-shaped to ensure the interface matching pressure of the stress cone 130, the outer insulation 100 and the conductive rod 110. The material of the body 131 is conductive rubber.

[0054] The spring 133 pressure plate includes a fixing plate 134 fixedly arranged at the bottom of the outer insulation 100, a top rod 135 slidably arranged on the fixing plate 134, a fin 136 arranged on the top rod 135, and a spring 133 sleeved on the top rod 135, wherein one end of the spring 133 abuts against the fixing plate 134, and the other end abuts against the fin 136; the top rod 135 abuts against the insulating rubber 132. The force of the spring 133 enables the top rod 135 to always abut against the body 131 to provide continuous pressure.

[0055] The bottom of the outer insulation 100 is provided with a bottom plate 170, the fixing plate 134 is fixedly arranged on the bottom plate 170; the tail pipe 140 is fixedly arranged on the fixing plate 134. The tail pipe 140 is used to connect with the metal sheath 124 of the cable 120, and the seven-fold sealing cable 120 and the electric metal sheath 124 are grounded.

[0056] The bottom of the conductive rod 110 abuts against the top of the insulating rubber 132. The conductive rod 110 contacts the insulating rubber 132 to ensure downward pressure of the insulating rubber 132.

[0057] All devices (parts without specific structure) selected in this application are universal standard parts or parts known to those skilled in the art, and their structures and principles are known to those skilled in the art through technical manuals or conventional experimental methods. In addition, the software programs involved in this application are all prior art, and this application does not involve any improvement to the software programs.

[0058] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0060] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0061] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0062] In addition, each functional unit in each embodiment of the present utility model may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0063] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A dry outdoor terminal, characterized in that: include: An outer insulation, a conductive rod sleeved in the outer insulation, a cable arranged through the conductive rod, a stress cone for fixing the cable, and a tail pipe arranged at the bottom of the outer insulation, wherein: The outer insulating end is also provided with a top plate suitable for waterproofing, and a connection terminal connected to the end of the cable is installed on the top plate.

2. The dry outdoor terminal according to claim 1, characterized in that: The top plate extends downward with a flange to form a mounting cavity, the outer insulation is arranged in the mounting cavity, and a mounting hole is opened on the top plate, wherein: The size of the mounting hole matches the size of the wiring terminal.

3. The dry outdoor terminal according to claim 2, characterized in that: The top plate is also provided with a sealing ring to seal the connection terminal to the top plate.

4. The dry outdoor terminal according to claim 1, characterized in that: The stress cone includes a body, an insulating rubber disposed above the body, and a spring pressure plate disposed at the lower end of the body, wherein: One end of the spring pressure plate abuts against the insulating rubber, and the other end is fixed to the bottom of the outer insulation.

5. The dry outdoor terminal according to claim 4, characterized in that: Both sides of the cross section of the body are arc-shaped, and the material of the body is conductive rubber.

6. The dry outdoor terminal according to claim 4, characterized in that: The spring pressure plate comprises a fixing plate fixedly arranged on the outer insulating bottom, a top rod slidably arranged on the fixing plate, a fin arranged on the top rod and a spring sleeved on the top rod, wherein: One end of the spring abuts against the fixing plate, and the other end abuts against the fin; The push rod abuts against the insulating rubber.

7. The dry outdoor terminal according to claim 6, characterized in that: A bottom plate is disposed at the bottom of the outer insulation, and the fixing plate is fixedly disposed on the bottom plate.

8. The dry outdoor terminal according to claim 7, characterized in that: The tail pipe is fixedly arranged on the fixing plate.

9. The dry outdoor terminal according to claim 4, characterized in that: The bottom of the conductive rod abuts against the top of the insulating rubber.

10. The dry outdoor terminal according to claim 1, characterized in that: The connection terminal is electrically connected to the conductor of the cable.

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