CN211981473U

CN211981473U - Cable intermediate joint with signal acquisition function

Info

Publication number: CN211981473U
Application number: CN202020595723.1U
Authority: CN
Inventors: 赵法强; 汪建波; 陈加文; 袁汉凯
Original assignee: Shenzhen Power Supply Bureau Co Ltd
Current assignee: Shenzhen Power Supply Bureau Co Ltd
Priority date: 2020-04-20
Filing date: 2020-04-20
Publication date: 2020-11-20
Anticipated expiration: 2030-04-20

Abstract

The application relates to a cable intermediate head with signal acquisition function includes: sealing tube, connecting pipe, cable, at least two shielding subassemblies and collecting pipe. This application embodiment is through being provided with the sealed tube, the sealed tube will the connecting pipe with the cable is sealed hold in the cavity. The sealing tube is further provided with a collecting tube, when the connecting tube and the cable are subjected to partial discharge, the generated partial discharge signal is concentrated in the accommodating cavity, and the collecting tube is communicated with the accommodating cavity. Therefore, when the partial discharge signal of the cable intermediate joint needs to be collected or monitored, the external collection or signal collection equipment only needs to be connected with the free end of the collection pipe. The embodiment of the application solves the technical problem that the partial discharge signal in the cable intermediate head is difficult to collect in the prior art, and achieves the technical effect of improving the partial discharge signal collection effect in the cable intermediate head.

Description

Cable intermediate joint with signal acquisition function

Technical Field

The application relates to the technical field of electrical equipment, in particular to a cable intermediate joint with a signal acquisition function.

Background

With the development of economy, the cabling rate of urban distribution networks is higher and higher, and a large number of cable intermediate connectors are used. The cable intermediate joint has the characteristics of convenience in installation, good insulating property, high temperature resistance and acid-base resistance, and is widely applied to distribution networks.

The problem of the fault of the middle joint of the cable is continuously caused, which seriously threatens the safe and stable operation of the power grid and sometimes even causes the tripping of the feeder line. The cable has simple structure and large current-carrying capacity, but because the construction level and the installation quality of different manufacturers are different, the operation and maintenance of some cables are rough, and the phenomenon of partial discharge is prominent. Partial discharge is the main cause of cable insulation damage, and the change of the partial discharge amount can relatively comprehensively and sensitively reflect the insulation condition of electrical equipment, and is often used for representing the running stability of cables. When the cable intermediate joint is partially discharged, various partial discharge signals can be released, such as: electric signals, optical signals, sound signals, gas signals and the like, but the cable intermediate joint is of a totally-enclosed structure at present, and the shielding layer is arranged on the outer layer, so that the signals are shielded, and partial discharge signals in the cable intermediate joint are difficult to collect.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a cable intermediate connector with a signal acquisition function to solve the problem that a partial discharge signal inside the cable intermediate connector is difficult to acquire.

A cable intermediate joint with signal acquisition functionality, comprising:

a sealed tube including opposing first and second openings, the sealed tube having a receiving cavity;

the connecting pipe is arranged in the accommodating cavity;

the cable penetrates through the connecting pipe, and two ends of the cable extend to the outer surface of the sealing pipe through the first opening and the second opening respectively;

the at least two shielding assemblies are respectively arranged at two ends of the sealing tube and used for sealing the first opening and the second opening, and the cable penetrates through the first opening, the second opening and the at least two shielding assemblies;

one end of the collecting pipe is arranged on the sealing pipe, the other end of the collecting pipe is free, and the collecting pipe is communicated with the accommodating cavity;

and the signal acquisition equipment is arranged at the other end of the collecting pipe and is used for acquiring the partial discharge signals transmitted by the collecting pipe.

In one embodiment, the method further comprises the following steps:

the groove is arranged on the inner surface of the sealing tube.

In one embodiment, the number of the grooves is multiple, and the grooves are distributed in a net shape in a cross communication manner.

In one embodiment, the method further comprises the following steps:

the adjusting seam is arranged on the sealing pipe along the length direction of the sealing pipe;

and the sealing strip is arranged along the length direction of the sealing pipe and seals the adjusting seam.

In one embodiment, the method further comprises the following steps:

and the at least two sealing hoops are respectively sleeved at two ends of the sealing pipe and used for tightening the adjusting seam.

In one embodiment, the sealing cuff is an open sealing cuff comprising:

the first jack and the second jack are respectively arranged at two ends of the open type sealing hoop;

and the connecting rod is inserted in the first jack and the second jack and used for tightening two ends of the open type sealing hoop.

In one embodiment, the method further comprises the following steps:

the mounting, set up in the one end of connecting rod, with the connection can be dismantled to the connecting rod, be used for with the connecting rod is fixed in sealed hoop.

In one embodiment, the method further comprises the following steps:

and the valve is arranged on the collecting pipe and used for controlling the communication and the closing between the collecting pipe and the accommodating cavity.

In one embodiment, the sealing tube is provided with a through hole, and the collecting tube penetrates through the through hole and is communicated with the accommodating cavity.

In one embodiment, the method further comprises the following steps:

and the vacuum pump is connected with the free end of the collecting pipe.

The embodiment of the application provides a cable intermediate head with signal acquisition function, includes: sealing tube, connecting pipe, cable, at least two shielding subassemblies and collecting pipe. This application embodiment is through being provided with the sealed tube, the sealed tube will the connecting pipe with the cable is sealed hold in the cavity. The sealing tube is further provided with a collecting tube, when the connecting tube and the cable are subjected to partial discharge, the generated partial discharge signal is concentrated in the accommodating cavity, and the collecting tube is communicated with the accommodating cavity. Therefore, when the partial discharge signal of the cable intermediate joint needs to be collected or monitored, the external collection or signal collection equipment only needs to be connected with the free end of the collection pipe. The embodiment of the application solves the technical problem that the partial discharge signal in the cable intermediate head is difficult to collect in the prior art, and achieves the technical effect of improving the partial discharge signal collection effect in the cable intermediate head.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of a cable intermediate joint structure with a signal acquisition function according to an embodiment of the present application;

fig. 2 is a schematic view of a cable intermediate joint structure with a signal acquisition function according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a cable intermediate joint sealing hoop with a signal acquisition function according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a cable intermediate connector valve with a signal acquisition function according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a vacuum pump with a cable intermediate connector and a signal acquisition function according to an embodiment of the present application.

Description of reference numerals:

10. the cable intermediate joint has a signal acquisition function;

100. a sealing tube;

110. a first opening;

120. a second opening;

130. a receiving cavity;

140. a groove;

150. adjusting the seam;

151. a sealing strip;

160. a through hole;

200. a connecting pipe;

300. a cable;

400. a shielding assembly;

500. a collection pipe;

600. a sealing band;

610. a first jack;

620. a second jack;

630. a connecting rod;

640. a fixing member;

700. a valve;

800. a vacuum pump;

900. and a signal acquisition device.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clearly understood, the cable intermediate joint with signal acquisition function of the present application is further described in detail by embodiments and with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

The embodiment of the application provides a cable intermediate head 10 with a signal acquisition function, which can be applied to any power utilization environment and used for locking and fixing a cable inlet and a cable outlet, so that all sections of cables are connected into a whole.

Referring to fig. 1, an embodiment of the present application provides a cable intermediate connector 10 with a signal acquisition function, including: sealing tube 100, connecting tube 200, cable 300, shield assembly 400, collection tube 500, and signal acquisition device 900.

The sealing tube 100 is hollow and has two ends penetrating, the sealing tube 100 includes a first opening 110 and a second opening 120 opposite to each other, and the sealing tube 100 has a receiving cavity 130. The sealing tube 100 serves as a housing for providing an installation space for other electrical components such as the cable 300 and the like, and also serves to protect the internal electrical components. The sealing tube 100 may be cylindrical, prismatic, or any other shape, and the sealing tube 100 may be made of any metal material or alloy material, such as steel, copper, or copper-nickel alloy. The outer surface of the sealing tube 100 may be smooth or rough, for example, the outer surface of the sealing tube 100 may be provided with a plurality of protrusions or threads, etc. to increase friction with a hand or a tool, thereby facilitating installation. The inner surface of the sealing tube 100 may be smooth to facilitate transmission of various partial discharge signals, and the inner surface of the sealing tube 100 may also be rough, for example, provided with a plurality of protrusions to facilitate providing a mounting base or support for internal electrical components. The sealing tube 100 of the present embodiment is not limited in any way, and only needs to satisfy a function of providing an installation space for other electrical components such as the cable 300.

Connecting pipe 200 set up in hold cavity 130, the both ends of connecting pipe 200 link up, connecting pipe 200 is used for connecting the inlet wire cable and the cable of being qualified for the next round of competitions, for inlet wire cable 300 with the cable provides to connect and makes appear, prevents the inlet wire cable with the cable of being qualified for the next round of competitions splits under the action of gravity. The connection tube 200 may be made of any metal material or alloy material, or may be made of conductive non-metal material such as graphite. The connecting tube 200 may be cylindrical or ellipsoidal, and the diameter of the connecting tube 200 may be specifically selected or designed according to the actual size of the cable 300, which is not limited in this embodiment.

The cable 300 is inserted into the connection pipe 200, and both ends of the cable 300 extend to the outer surface of the sealing pipe 100 through the first opening 110 and the second opening 120, respectively. The cable 300 may be any type of cable, and the cable 300 may be formed by twisting a plurality of or a plurality of groups of wires, and may include an incoming cable and an outgoing cable, which are respectively used for inputting and outputting information. The cable 300 may be any type of cable, and may be a dc cable or an ac cable, for example: power cables, control cables, signal cables, coaxial cables, and the like. The cable 300 is not limited in this embodiment, and only needs to satisfy the function of transmitting electrical signals.

The number of the shielding assemblies 400 is two, and when the number of the shielding assemblies 400 is two, the two shielding assemblies 400 are respectively disposed at two ends of the sealing tube 100 to seal the first opening 110 and the second opening 120. The shield assembly 400 may be made of any metal or alloy material, such as: copper, iron, cobalt-nickel alloys, and the like. The shielding assembly 400 may have any shape, may be disposed inside the sealing tube 100, or may be disposed on the outer surface of the sealing tube 100, and the shielding assembly 400 may have the same size as the first opening 110 and the second opening 120, and may be sealed at the first opening 110 and the second opening 120. The shielding assembly 400 may be larger than the first opening 110 and the second opening 120 and disposed on the outer surface of the sealing tube 100. The shielding assembly 400 is not particularly limited in this embodiment, and only needs to satisfy the function of blocking the first opening 110 and the second opening 120 to prevent leakage of the internal partial discharge signal.

One end of the collection pipe 500 is disposed in the sealing pipe 100, and the collection pipe 500 penetrates the accommodation cavity 130. The collection tube 500 includes two opposing ports, a first end and a second end, respectively. The first end of the collection tube 500 is disposed at the sealing tube 100, and may be inserted into the housing of the sealing tube 100, or may extend to the receiving cavity 130 through the housing of the sealing tube 100. The other end of the collection tube 500 may be used to connect to a signal collection device or other collection or detection device. The collecting pipe 500 may be made of a conductive material, or may be formed by sleeving an inner metal pipe and an outer insulating pipe. In this embodiment, the collecting tube 500 is not limited at all, and only needs to be capable of communicating with the accommodating cavity 130 to collect the partial discharge signal inside the accommodating cavity 130.

The other end of the collecting pipe 500 is connected to a signal collecting device 900, and the signal collecting device 900 is disposed at the other end of the collecting pipe 500 and is used for collecting a partial discharge signal transmitted through the collecting pipe 500, that is, a partial discharge signal generated when partial discharge occurs in the connecting pipe 200 and the cable 300 in the sealing pipe 100, such as an electrical signal, a gas signal, or a liquid signal. The signal acquisition device 900 may be one or multiple devices, and is configured to acquire and monitor the partial discharge signals of different types. In this embodiment, the signal collecting device 900 is not limited at all, and only needs to fulfill the function of monitoring the partial discharge signal generated when the partial discharge occurs in the connection tube 200 and the cable 300 in the sealing tube 100.

The working principle of the cable intermediate joint 10 with the signal acquisition function provided by the embodiment of the application is as follows:

the embodiment of the present application provides that the cable intermediate head 10 with the signal acquisition function is provided with a sealing tube 100, the sealing tube 100 has a containing cavity 130, and the connecting tube 200 and the cable 300 are arranged in the containing cavity 130 of the sealing tube 100. When a partial discharge occurs at the connection tube 200 and the cable 300, a partial discharge signal, such as an electric signal, a gas signal, a liquid signal, etc., is generated, and the partial discharge signal is concentrated to the receiving cavity 130. The collecting pipe 500 is arranged on the sealing pipe 100, the collecting pipe 500 is communicated with the accommodating cavity 130, and when partial discharge signals at the connecting pipe 200 and the cable 300 are required to be collected or monitored, the partial discharge signals in the accommodating cavity 130 can be collected only by connecting the collecting pipe 500.

The present embodiment provides a cable intermediate joint 10 with a signal acquisition function, including: the sealing tube 100, the connecting tube 200, the cable 300, at least two of the shielding assemblies 400, and the collecting tube 500. In this embodiment, the sealing tube 100 is provided, and the sealing tube 100 seals the connecting tube 200 and the cable 300 in the accommodating cavity 130. The sealing tube 100 is further provided with a collecting tube 500, when a partial discharge occurs between the connecting tube 200 and the cable 300, a partial discharge signal is concentrated in the accommodating cavity 130, and the collecting tube 500 is communicated with the accommodating cavity 130. Therefore, when the partial discharge signal of the cable intermediate joint needs to be collected or monitored, the external collection or signal collection device 900 only needs to be connected with the free end of the collection pipe 500. The embodiment solves the technical problem that the partial discharge signal in the cable intermediate joint 10 is difficult to collect in the prior art, and achieves the technical effect of improving the partial discharge signal collection effect in the cable intermediate joint 10.

Referring to fig. 2 and 3 together, in an embodiment, the cable intermediate connector 10 with signal acquisition function further includes: groove 140, adjustment slit 150, sealing strip 151, sealing cuff 600, and fastener 640.

The groove 140 is opened on the inner surface of the sealing tube 100 to provide a space for accommodating and circulating a gas signal and a liquid signal generated when the cable 300 and the connection tube 200 are partially discharged. A plurality of protrusions may be further disposed on the inner surface of the sealing tube 100 at intervals, a groove 140 is formed between the plurality of protrusions, and the protrusions may be made of a conductive material or an insulating material, which is not particularly limited in this embodiment. The number of the grooves 140 may be one or a plurality of grooves 140, and when the number of the grooves 140 is a plurality, the plurality of grooves 140 may be cross-connected and distributed in a mesh shape, or may be arranged according to a certain rule, for example, may be distributed in a checkerboard shape, a star shape, or the like. The groove 140 may be rectangular, arc-shaped, or inverted triangular. In this embodiment, the groove 140 is not limited at all, and only needs to satisfy the function of providing an accommodating and flowing space for the gas signal, the liquid signal, and the like in the partial discharge signal.

The adjusting seam 150 is opened in the sealing tube 100 along the length direction of the sealing tube 100, and the adjusting seam 150 penetrates through both ends of the sealing tube 100. When the cable intermediate joint 10 with the signal acquisition function is installed, a worker can apply force to two sides along the radial direction of the sealing tube 100, so that the width of the adjusting seam 150 is enlarged, the cable 300 can be conveniently placed into the accommodating cavity 130 through the adjusting seam 150, no other auxiliary tool is needed in the process, manual operation is simple, and the cable 300 cannot be damaged. The width of the adjusting slit 150 may be specifically designed according to actual conditions, and the adjusting slit 150 is not specifically limited in this embodiment, and only needs to fulfill the function of providing an inlet for the cable 300 to be placed in the accommodating cavity 130.

The sealing strips 151 are disposed along the length direction of the sealing tube 100 to seal the adjustment slits 150. The sealing strip 151 may be made of any flexible material, such as: rubber, flexible plastic, etc., the sealing strip 151 may also be made of any hard material, such as pure metal, alloy, rigid plastic, wood, etc. The length of the sealing strip 151 is not less than the height of the sealing tube 100, and the width of the sealing strip 151 may be equal to the width of the adjusting slot 150, or may be greater than the width of the adjusting slot 150. The sealing strip 151 is not particularly limited in this embodiment, and only needs to satisfy the function of sealing the adjustment slit 150.

The sealing hoops 600 are used for tightening the adjusting seams 150, the number of the sealing hoops 600 is not less than two, and when the number of the sealing hoops 600 is two, the two sealing hoops 600 are respectively sleeved at two ends of the sealing pipe 100. The sealing band 600 may be a closed sealing band or an open sealing band. The closed sealing hoop can be directly sleeved at two ends of the sealing pipe 100 and is convenient to fix, and the open sealing hoop is sleeved at two ends of the sealing hoop 600, so that workers can conveniently install and disassemble. When the sealing cuff 600 is an open sealing cuff, the open sealing cuff may include: a first receptacle 610, a second receptacle 620, and a connection rod 630. The first insertion hole 610 and the second insertion hole 620 are respectively arranged at two ends of the open type sealing hoop, and the first insertion hole 610 and the second insertion hole 620 are opposite in position. The first insertion hole 610 and the second insertion hole 620 may have the same size and shape, or may have different sizes and shapes, for example, they may be circular, diamond-shaped, or any other polygon, and the first insertion hole 610 and the second insertion hole 620 only need to meet the requirement of relative positions, so as to facilitate the insertion of the connection rod 630. The connecting rod 630 is inserted into the first insertion hole 610 and the second insertion hole 620, and is used for tightening both ends of the open type sealing band. The connecting rod 630 may be a bolt, and the like, and the inner surfaces of the first insertion hole 610 and the second insertion hole 620 are provided with internal threads, which match with the threads on the bolt and can be connected by threads. The connecting rod 630 may be made of any hard material, such as: pure metals, alloys, rigid plastics, wood, etc. In this embodiment, the connection rod 630 is not limited at all, and only needs to be able to fix the first insertion hole 610 and the second insertion hole 620.

The fixing member 640 is disposed at one end of the connection rod 630, detachably connected to the connection rod 630, and configured to fix the connection rod 630 to the seal hoop 600. The fixing member 640 may be a fastener or a nut, and when the fixing member 640 is a nut, the connecting rod 630 may be a bolt, and the bolt and the nut are matched with each other and detachably connected. The securing member 640 may be made of any hard material, such as: pure metals, alloys, rigid plastics, wood, etc. The fixing member 640 of this embodiment is not particularly limited, and only needs to fulfill the function of fixing the connecting rod 630 to the sealing band 600.

Referring to fig. 4 and 5 together, in an embodiment, the cable intermediate connector 10 with signal acquisition function further includes: a valve 700 and a vacuum pump 800.

The valve 700 is disposed in the collection tube 500, and is used for controlling the communication and closing between the collection tube 500 and the accommodating cavity 130. The valve 700 may be disposed at the free end of the collection tube 500, or may be disposed at any position of the collection tube 500 away from the outer surface of the sealing tube 100. The valve 700 may be any one of a vacuum valve, a low pressure valve, a high pressure valve, or an ultrahigh pressure valve, and the valve 700 may be made of a cast steel material, a plastic material, or other non-standard materials. The valve 700 of this embodiment is not limited in any way, and only needs to fulfill the function of controlling the communication and closing between the collecting pipe 500 and the accommodating cavity 130.

The vacuum pump 800 is connected to the free end of the collecting pipe 500, and is used for providing a negative pressure to suck out a gas signal or a liquid signal in the accommodating cavity 130 of the sealing pipe 100 for collection or detection by an external device. The vacuum pump 800 may be any one of a liquid ring pump, a direct-coupled rotary vane pump, and a roots pump. The power of the vacuum pump 800 may be specifically selected or set according to actual situations, and the vacuum pump 800 is not limited in this embodiment, and only needs to provide a negative pressure to suck out the gas signal or the liquid signal in the accommodating cavity 130 in the sealing tube 100.

In one embodiment, the sealing tube 100 defines a through hole 160, and the collecting tube 500 is disposed through the through hole 160 and communicates with the accommodating cavity 130. The through hole 160 may be opened at any position of the sealing tube 100, and the through hole 160 may be circular, square, or any other shape. When the aperture of the through hole 160 is larger than the tube diameter of the collecting tube 500, a filler may be added to the gap between the collecting tube 500 and the through hole 160 for sealing. The inner or outer surface of the free end of the collection tube 500 may be threaded to facilitate a threaded connection with an external device to make the connection between the collection tube 500 and the external device more secure.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A cable intermediate joint with signal acquisition function, characterized by comprising:

the connecting pipe is arranged in the accommodating cavity;

2. The cable intermediate joint with signal acquisition function according to claim 1, further comprising:

the groove is arranged on the inner surface of the sealing tube.

3. The cable intermediate joint with signal acquisition function as claimed in claim 2, wherein the number of the grooves is plural, and the plural grooves are distributed in a net shape in a cross communication manner.

4. The cable intermediate joint with signal acquisition function according to claim 1, further comprising:

5. The cable intermediate joint with signal acquisition function according to claim 4, characterized by further comprising:

6. The signal acquisition capable cable intermediate joint according to claim 5, wherein the sealing hoop is an open sealing hoop, and the open sealing hoop comprises:

7. The cable intermediate joint with signal acquisition function according to claim 6, characterized by further comprising:

8. The cable intermediate joint with signal acquisition function according to claim 1, further comprising:

9. The intermediate cable joint with the signal acquisition function as claimed in claim 1, wherein the sealing tube has a through hole, and the collecting tube penetrates through the through hole and is communicated with the accommodating cavity.

10. The cable intermediate joint with signal acquisition function according to claim 1, further comprising:

and the vacuum pump is connected with the free end of the collecting pipe.