CN206099286U - A cable joint - Google Patents

Abstract

The utility model provides a cable joint, include: the insulating sleeve, the second channel that has first passageway and communicate each other with first passageway, the sleeve pipe sets up the first end at first passageway, the threaded rod sets up in first passageway, crimping copper nose sets up in the second channel, and the first end of crimping copper nose is connected with the threaded rod, the second end and the cable junction of crimping copper nose, temperature measuring device sets up on the threaded rod. The technical scheme of the utility model the problem of the unable accurate temperature measurement of a cable joint among the prior art has been solved.

Description

Cable Connector

technical field

The utility model relates to the electrical field, in particular to a cable joint.

Background technique

In recent years, with the progress of society, electric power safety has attracted more and more national attention. At the beginning of the 21st century, the power grid transformation overhead project minimized the unsafe factors caused by overhead wires (cables). However, in recent years, it has been found that although the safety problem in the line has been solved, the connection problem of the cable connection position of the power distribution equipment is on the rise year by year. Among them, most of the accidents are caused by the heating of cable connection parts, so how to intuitively know the heating temperature and heating parts of cables is imminent. At this stage, many companies use infrared temperature measuring devices to measure the temperature of cables and connectors. However, they can only judge the heating point but cannot accurately reflect the heating temperature, and cannot judge whether the heating point is in a safe temperature range, so the effect is not good.

How to solve the problem of temperature measurement of cable terminals and ensure safe and reliable power supply is the need to promote economic development and build a harmonious society. It is a very difficult task before us, and it is also a big problem that has been difficult to solve for a long time.

Utility model content

The main purpose of the utility model is to provide a cable joint to solve the problem that the cable joint in the prior art cannot measure temperature accurately.

In order to achieve the above object, the utility model provides a cable joint, comprising: an insulating sleeve having a first channel and a second channel communicating with the first channel; a sleeve arranged at the first end of the first channel; The threaded rod is set in the first channel; the crimping copper nose is set in the second channel, the first end of the crimping copper nose is connected with the threaded rod, and the second end of the crimping copper nose is connected with the cable; temperature measuring device , set on the threaded rod.

Further, the temperature measuring device is arranged on the side of the crimping copper nose away from the bushing.

Further, the threaded rod is fixed on the crimping copper nose through a nut, and the temperature measuring device is in contact with the nut.

Further, the cable joint further includes an insulating plug, and the insulating plug is arranged at the second end of the first channel.

Further, the insulating plug has a central through hole, and the cable connector further includes a sensor, and the sensor is arranged in the central through hole.

Further, the cable joint also includes an insulating plug, and the insulating plug is matched with the stopper of the insulating plug.

Further, the cable joint also includes a shielding layer, and the shielding layer is sheathed outside the insulating sleeve.

Further, a shielding layer grounding hole is provided on the shielding layer.

Further, the cable joint also includes a stress cone, the stress cone is arranged in the second channel, and the stress cone is sleeved on the cable.

Further, the cable joint also includes a pressure equalizing layer, which is arranged on the inner walls of the first passage and the second passage, and the circumferential outer side of the crimping copper nose, the contact between the crimping copper nose and the insulating sleeve, and the stress cone and the insulating sleeve. A pressure equalizing layer is arranged at the contact of the insulating sleeve.

Applying the technical solution of the utility model, the cable joint includes an insulating sleeve, a sleeve, a threaded rod, a crimping copper nose and a temperature measuring device. Wherein, the insulating sleeve has a first channel and a second channel communicating with the first channel. A sleeve is disposed at the first end of the first channel. A threaded rod is disposed within the first channel. The crimping copper lug is arranged in the second channel, the first end of the crimping copper lug is connected with the threaded rod, and the second end of the crimping copper lug is connected with the cable. The temperature measuring device is set on the threaded rod. In this application, since the heat-prone part of the cable joint is the connection part between the crimped copper nose and the threaded rod, installing a temperature measuring device at this position can accurately and effectively measure the heating temperature, and then the temperature measured by the temperature measuring device The signal is transmitted to the receiving device and uploaded to the receiving terminal, thereby realizing real-time temperature monitoring of the cable joint. In this way, the staff can judge whether the heating temperature of the cable joint is in the safe temperature range, which is helpful for the staff to check and troubleshoot the faulty equipment in advance.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 shows a schematic diagram of an exploded structure of an embodiment of a cable joint according to the present invention.

Wherein, the above-mentioned accompanying drawings include the following reference signs:

10. Insulating sleeve; 11. First channel; 12. Second channel; 20. Sleeve; 30. Threaded rod; 40. Crimp copper nose; 50. Temperature measuring device; 60. Insulating plug; 70. Sensor; 80, insulation plug plug.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. The following description of at least one exemplary embodiment is merely illustrative in nature, and in no way serves as any limitation of the invention and its application or use. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

The relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authorized Specification. In all examples shown and discussed herein, any specific values should be construed as exemplary only, and not as limitations. Therefore, other examples of the exemplary embodiment may have different values. It should be noted that like numerals and letters denote like items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent figures.

In the description of the present utility model, it should be understood that orientation words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" etc. indicate The orientation or positional relationship is generally based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description. In the absence of a contrary statement, these orientation words do not indicate or imply the referred device Or components must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be construed as limiting the protection scope of the present utility model; the orientation words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

For the convenience of description, spatially relative terms may be used here, such as "on ...", "over ...", "on the surface of ...", "above", etc., to describe the The spatial positional relationship between one device or feature shown and other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as "above" or "above" other devices or configurations would then be oriented "beneath" or "above" the other devices or configurations. under other devices or configurations". Thus, the exemplary term "above" can encompass both an orientation of "above" and "beneath". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing corresponding components. To limit the scope of protection of the utility model.

Fig. 1 shows a schematic diagram of an exploded structure of an embodiment of a cable joint according to the present utility model. Nose 40 and temperature measuring device 50. Wherein, the insulating sleeve 10 has a first channel 11 and a second channel 12 communicating with the first channel 11 . The bushing 20 is arranged at the first end of the first channel 11 . A threaded rod 30 is disposed within the first channel 11 . The crimping copper nose 40 is arranged in the second channel 12 , the first end of the crimping copper nose 40 is connected with the threaded rod 30 , and the second end of the crimping copper nose 40 is connected with the cable. The temperature measuring device 50 is arranged on the threaded rod 30 .

Applying the technical solution of this embodiment, since the heat-prone part of the cable joint is the connection part between the crimped copper nose 40 and the threaded rod 30, the temperature measuring device 50 installed at this part can accurately and effectively measure the heating temperature, and then the measured The temperature signal measured by the temperature device 50 is transmitted to the receiving device and uploaded to the receiving terminal, thereby realizing real-time temperature monitoring of the cable joint. In this way, the staff can judge whether the heating temperature of the cable joint is in the safe temperature range, which is helpful for the staff to check and troubleshoot the faulty equipment in advance.

The insulating sleeve 10 includes a first cylinder and a second cylinder. Wherein, the second cylinder is arranged on the through hole of the circumferential side wall of the first cylinder, and the first cylinder and the second cylinder are perpendicular to each other. Specifically, the first passage (11) is arranged in the first cylinder, and the second passage (12) is arranged in the second cylinder.

The outer surface of the sleeve 20 is in the shape of a truncated cone, that is, the outer diameter of one end of the sleeve 20 is smaller than the outer diameter of the other end. Specifically, the end with a smaller outer diameter is close to the sleeve 20 , and the end with a larger outer diameter is away from the sleeve 20 . The above structure makes it easier to connect the bushing 20 and the insulating sleeve 10 , and is convenient for the staff to operate.

As shown in FIG. 1 , the temperature measuring device 50 is arranged on the side of the crimping copper nose 40 away from the bushing 20 . The temperature measuring device 50 can enter the first channel 11 from the side of the insulating sleeve 10 away from the bushing 20 , and the above structure makes the temperature measuring device 50 easy to install.

As shown in FIG. 1 , the threaded rod 30 is fixed on the crimping copper nose 40 through a nut, and the temperature measuring device 50 is in contact with the nut. Preferably, the threaded rod 30 is a stepped rod. When cables are connected to products such as ring network cabinets, central cabinets, and cable branch boxes, the crimping copper nose 40 is set on the threaded rod 30 earlier. During the sleeve installation process, the upper step of the threaded rod 30 faces the crimping copper nose 40 to stop. The stepped cylinder with smaller diameter on the threaded rod 30 is provided with external threads, and the crimping copper nose 40 is sleeved on the threaded rod 30 and contacts the step surface, and the crimping copper nose 40 is fixed on the threaded rod 30 through the cooperation of the nut and the thread. , so as to realize the fixation of the crimping copper nose 40 .

As shown in FIG. 1 , the cable joint further includes an insulating plug 60 disposed at the second end of the first channel 11 . The above-mentioned structure can provide insulation protection for the second end of the first channel 11, thereby improving the safety of the staff during the use of the cable joint and ensuring personal safety. As shown in FIG. 1 , in this embodiment, the outer surface of the insulating plug 60 is in the shape of a truncated cone, that is, the outer diameter of one end of the insulating plug 60 is smaller than the outer diameter of the other end. Specifically, the end with a smaller outer diameter is close to the sleeve 20 , and the end with a larger outer diameter is away from the sleeve 20 . The above structure makes it easier to install the insulating plug 60 into the first channel 11 . At the same time, the end with a large outer diameter is provided with an annular flange, which is more convenient for the staff to operate the insulating plug 60 .

As shown in FIG. 1 , the insulating plug 60 has a central through hole, and the cable connector further includes a sensor 70 disposed in the central through hole. The sensor 70 receives the temperature signal measured by the temperature measuring device 50 and transmits the temperature signal to a signal receiving device matched with the cable joint. The sensor 70 is arranged in the central through hole of the insulating plug 60, which can prevent the electromagnetic wave signal in the cable from interfering with the sensor 70, thereby improving the accuracy of temperature measurement.

As shown in FIG. 1 , the cable joint further includes an insulating plug 80 , and the insulating plug 80 is matched with the stopper of the insulating plug 60 . The insulating plug plug 80 can prevent the sensor 70 from falling off from the insulating plug 60 , and cooperate with the insulating plug 60 to seal the sensor 70 in the first channel 11 of the insulating sleeve 10 . The above structure can prevent other signals from causing signal interference to the sensor 70 , thereby improving the accuracy of the temperature measuring device 50 .

In this embodiment, the cable joint further includes a shielding layer, and the shielding layer is sheathed outside the insulating sleeve 10 . Since the current passing through the cable is relatively large, a magnetic field will be generated around the current. In order not to affect other components, the shielding layer is set outside the insulating sleeve 10 to shield the above-mentioned magnetic field in the cable. At the same time, the setting of the shielding layer on the cable joint can play a certain role in grounding protection. If the cable core wire is damaged, the leaked current can reach the ground along the shielding layer, thus playing a role of safety protection.

In this embodiment, a shielding layer grounding hole is provided on the shielding layer. Ground the cable joint through the grounding hole of the shielding layer, so as to play a role of safety protection. In the running state, the shielding layer is at zero potential in a good grounding state. When the cable fails, it has the ability to conduct short-circuit current in a very short time.

In the technical solution of this embodiment, the cable joint further includes a stress cone, the stress cone is arranged in the second channel 12, and the stress cone is sleeved on the cable. Electrical stress control is an extremely important part in the design of medium and high voltage cable accessories. Electric stress control is to control the electric field distribution and electric field intensity inside the cable accessories, that is, to take appropriate measures to make the electric field distribution and electric field intensity in the best state, so as to improve the reliability and service life of the cable accessories.

For cable joints, the electric field distortion is the most serious, and the most affecting joint operation reliability is the cutting of the outer shield of the cable, while the influence of the electric field distortion of the middle joint of the cable is not only the cutting of the outer shield of the cable, but also the cutting of the insulation of the cable end. In order to improve the electrical stress distribution at the cutting point of the cable insulation shielding layer, specifically, the following three methods are generally used to improve:

1. The geometric shape method, that is, the stress cone is used to relieve the stress concentration of the electric field;

2. Parameter control methods, including the use of high dielectric constant materials and non-linear resistance materials to alleviate electric field stress concentration;

3. Comprehensive control method, that is, the use of capacitor cones to alleviate the stress concentration of the electric field.

In this embodiment, the geometry method is used, that is, the stress cone is used to relieve the electric field stress concentration in the cable joint. From an electrical point of view, stress cones are also the most reliable and efficient method. The stress cone extends through the cutting part of the shielding layer, making the zero potential form a trumpet shape, improving the electric field distribution of the shielding layer, reducing the possibility of corona generation, reducing the damage of insulation, and thus improving the service life of the cable joint.

In this embodiment, the cable joint also includes a pressure equalizing layer, which is arranged on the inner walls of the first channel 11 and the second channel 12, and crimps the circumferential outer side of the copper nose 40, crimps the copper nose 40 and the insulating sleeve A pressure equalizing layer is provided at the contact of the cylinder 10 and the contact of the stress cone and the insulating sleeve 10 . The function of the equalizing layer is to make good contact between the conductor and the insulating layer, and to eliminate the local electric field distortion caused by the rough surface of the conductor. Specifically, there are two main purposes of setting the equalizing layer in the cable joint: one is to uniformly crimp the external electric field of the copper lug 40 and eliminate the air gap between the crimping copper lug 40 and the insulating sleeve 10 . Second, it is equivalent to increasing the fillet radius inside the insulating sleeve 10, which can improve the distribution of the electric field at the corner and achieve the purpose of reducing the maximum electric field intensity. Usually, the equalizing layer is formed by applying semi-conductor paint (glue).

This application develops a new type of temperature-measuring cable joint supporting receiving device and special software system, which can store, back up, and prompt the terminal temperature and position. The temperature can be set and prompted through the supporting software, and information can be sent to the designated mobile phone according to the existing communication technology. Or the background monitoring system, which helps the staff to check and troubleshoot the faulty equipment in advance.

The design idea of the cable connector in this embodiment is as follows:

Before the operation of the equipment, during the cable installation process, the easy-to-heat part of the cable is the connection part between the cable crimping copper nose 40 and the threaded rod 30, and the temperature measuring device 50 is installed at this part, which can accurately and effectively measure the heating temperature. The signal is transmitted to the receiving device and uploaded to the receiving terminal, and the temperature of the cable joint is monitored in real time.

From the above description, it can be seen that the above-mentioned embodiments of the utility model have achieved the following technical effects:

Since the heat-prone part of the cable joint is the connection part between the crimped copper nose and the threaded rod, installing a temperature measuring device at this part can accurately and effectively measure the heating temperature, and then transmit the temperature signal measured by the temperature measuring device to the receiving device and uploaded to the receiving terminal, thus realizing real-time temperature monitoring of the cable joints. In this way, the staff can judge whether the heating temperature of the cable joint is in the safe temperature range, which is helpful for the staff to check and troubleshoot the faulty equipment in advance.

The beneficial effects of the application are as follows:

1. It helps the staff to know the real-time temperature of the cable joint effectively.

2. Control the opening of the circuit breaker by setting the temperature to reduce the hazard of failure.

3. Strong pertinence, can effectively determine the location of fever, and the prompting effect is good.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. A cable joint, characterized in that it comprises: An insulating sleeve (10), having a first channel (11) and a second channel (12) communicating with the first channel (11); a sleeve (20), arranged at the first end of the first channel (11); a threaded rod (30), arranged in said first channel (11); The crimping copper nose (40) is arranged in the second channel (12), the first end of the crimping copper nose (40) is connected with the threaded rod (30), and the crimping copper nose ( 40) the second end is connected with the cable; The temperature measuring device (50) is arranged on the threaded rod (30). 2. The cable joint according to claim 1, characterized in that, the temperature measuring device (50) is arranged on a side of the crimping copper nose (40) away from the sleeve (20). 3. The cable joint according to claim 1, characterized in that, the threaded rod (30) is fixed on the crimping copper nose (40) by a nut, and the temperature measuring device (50) is connected with the nut touch. 4. The cable joint according to claim 1, characterized in that, the cable joint further comprises an insulating plug (60), and the insulating plug (60) is arranged at the second end of the first channel (11). 5. The cable joint according to claim 4, characterized in that, the insulating plug (60) has a central through hole, the cable joint further comprises a sensor (70), and the sensor (70) is arranged in the central through hole middle. 6. The cable joint according to claim 5, characterized in that, the cable joint further comprises an insulating plug (80), and the insulating plug (80) is matched with the stop of the insulating plug (60) . 7. The cable joint according to claim 1, characterized in that, the cable joint further comprises a shielding layer, and the shielding layer is sheathed outside the insulating sleeve (10). 8. The cable joint according to claim 7, wherein a shielding layer grounding hole is provided on the shielding layer. 9. The cable joint according to claim 1, characterized in that, the cable joint further comprises a stress cone, the stress cone is arranged in the second channel (12), and the stress cone is sleeved on the on the cable. 10. The cable joint according to claim 9, characterized in that, the cable joint further comprises an equalizing layer, and the equalizing layer is arranged on the first channel (11) and the second channel (12) on the inner wall of the crimping copper nose (40), the contact between the crimping copper nose (40) and the insulating sleeve (10) and the stress cone and the insulating sleeve (10) The pressure equalizing layer is arranged at the contact point.