CN201789265U - Composite outlet rod of cable terminal for gas or liquid insulating electrical device - Google Patents
Composite outlet rod of cable terminal for gas or liquid insulating electrical device Download PDFInfo
- Publication number
- CN201789265U CN201789265U CN2010202661542U CN201020266154U CN201789265U CN 201789265 U CN201789265 U CN 201789265U CN 2010202661542 U CN2010202661542 U CN 2010202661542U CN 201020266154 U CN201020266154 U CN 201020266154U CN 201789265 U CN201789265 U CN 201789265U
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- Prior art keywords
- outlet bar
- retainer ring
- location hole
- limiting section
- cable
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Abstract
The utility model relates to the field of power and electrical equipment, in particular to a cable terminal applied to a gas or liquid insulating electrical device, and discloses a composite outlet rod for a cable terminal for a gas or liquid insulating electrical device, which comprises an outlet rod body and a fixing ring. The outlet rod body is provided with an end, the cable penetrates out of the end of the outlet rod body, the fixing ring is provided with a positioning hole, the end of the outlet rod body is assembled in the positioning hole of the fixing ring along the axial direction of the positioning hole, a first limit portion, a second limit portion and a partition portion are formed at the end, the first limit portion is used for limiting relative excessive deviation of the axis of the outlet rod body from that of the positioning hole, the second limit portion separated from the first limit portion is used for limiting excessive movement of the fixing ring towards the direction of the other end opposite to the end, and the partition portion is positioned between the first limit portion and the second limit portion.
Description
Technical field
The utility model relates to the electric power electrical apparatus field, relates in particular to the cable termination that is applied in gas or the fluid insulation electric equipment.
Background technology
Power cable generally be used in distribution and the transmission of electricity hierarchical network supply of electric power, be used for electric power from the power plant or the power station be transported to city or rural user.The conductor that power cable is generally made by copper or aluminum is coated with the multilayer electric screen layer and the insulating barrier of rubber-plastics material at conductor.The outside is transmitted the sheath protection of the metallic shield cover and the waterproof sealing of earth current in addition.Power cable design is used for transmission voltage from 1000 volts to 500 kilovolts electric energy.
When power cable is connected with other electric equipment, need carry out necessary processing to the end of cable to guarantee electric property and weatherability reliably and with long-term.Usually, cable termination is used to protect cable end piece and is connected with miscellaneous equipment.
After cable was cut off, the conductor of cable was exposed in the air, and its current potential is 100% high pressure; Outside the metal screen layer of cable also was exposed on, its current potential was 0.Shielding of rubber and plastic between conductor and metal screen layer and insulation protection are also by according to the rules apart from peeling off.
At this moment, faced problems such as environmental pollution, corrosion by the conductor of strip off, rubber and plastic shielding/insulating barrier, metal level.After the rubber and plastic screen was cut off, the continuous distribution of the electric field in original cable was just broken.Can produce the high concentration phenomenon of local electric field strength in the place of the rubber and plastic of cable shielding mouthful.This phenomenon will change the distribution shape of electric field, and has increased the possibility of insulation breakdown.Cable termination, the discontinuous Electric Field Distribution of even cut cable on the one hand; Extra external insulation and weather resisteant protection also is provided in addition.
Usually, two kinds of cable termination technology are arranged: " open " cable termination and " closed " cable termination.For " open " cable termination, generally operate in the air-insulated environment." closed " cable termination then operates in the environment of insulating gas or liquid.Wherein, " closed " cable termination is mainly by forming with lower member: electric stress control piece, external insulator, outlet bar, upper fixing element and following fixture.
Yet, in the actual motion service of cable termination, the electric stress control piece may or be caused by external force owing to the variation of cable operating temperature to move up and down, thereby cause the electric stress control piece to change with respect to the position of cable main insulation and external insulator, and then the Electric Field Distribution of the original design of change, make the interior local electric field strength of cable termination sharply raise, and the deterioration of aggravation cable terminal insulation is until puncture.Therefore, need carry out strict fixing, limit it and move arbitrarily the electric stress control piece.
The general practice is to install goring push spring additional in the bottom of electric stress control piece at present, and enough mechanical thrusts are provided, and prevents that the electric stress control piece from moving down.Simultaneously, also loading onto fixture on the top of electric stress spare stops it to move up.
In general, as shown in Figure 1, gas or fluid insulation electric equipment cable termination comprise insulator 8, goring push spring, metal tail pipe, outlet bar 1A, retainer ring 9A, 9B and the electric stress control piece 8A that has flow guiding disc 7.As shown in Figure 2, common erection sequence is as follows: according to the cable of preliminary treatment shown in the installation instructions 5; Metal tail pipe and goring push spring are placed assigned address; Slip into electric stress control piece 8A precalculated position to the cable 5; Outlet bar 1A is crimped on the cable conductor 5A; On electric stress control piece 8A and outlet bar 1A, install retainer ring 9A, 9B; Earlier external insulator 8 is installed in the cable vault of electric equipment of gas or fluid insulation; Again cable 5 whole insertions in the external insulator 8; At last, screw the set bolt on the goring push spring, make electric stress control piece 8A closely contact with external insulator 8 in the appointed area so that the effect of uniform electric field to be provided according to designing requirement, guarantee that simultaneously the flow guiding disc 7 in outlet bar 1 and the external insulator 8 correctly is connected, and makes loaded current be able to flow into flow guiding disc fully from cable conductor.
Fig. 3 and Fig. 3 a are depicted as the desirable installation situation of traditional gas or liquid electric equipment cable termination outlet bar.
But (especially Fig. 3 can see most clearly that between cable conductor 5 and conductor retainer ring 9A a gap is arranged a), and another gap is between conductor retainer ring 9A and electric stress control piece retainer ring 9B from Fig. 3.Cable 5 is being inserted in the process of external insulator 8,, is making the dislocation of outlet bar easily because the existence in these two gaps is arranged.For this gas or fluid insulation electric equipment cable termination, to the position of outlet bar with require very strict with the contact quality of external insulator flow guiding disc.(especially Fig. 4 a) has shown the situation that a kind of outlet bar 1A that is caused by above-mentioned two kinds of gaps misplaces to Fig. 4 in external insulator 8.The worst situation is that the bias x at outlet bar 1A misalignment external insulator center reaches 10mm.This departing from can be caused outlet bar 1A and flow guiding disc 7 loose contacts, thereby contact resistance is risen, and produces extra heat under by the situation of big electric current, may cause whole cable termination electrical failure at last.
Simultaneously, traditional fixture generally separates with the outlet bar, for multiple-piece designs.Its technical scheme complexity is not easy to operate in installation.
The utility model content
The purpose of this utility model is to solve the existence mentioned in the background technology and at least one technical problem in traditional gas or the liquid electric equipment cable termination outlet bar.
At least one technical scheme of the present utility model is achieved in that
A kind of compound outlet bar that is used for gas or fluid insulation electric equipment cable termination, described compound outlet bar comprises:
Have the outlet bar body of end, wherein cable passes through the end of outlet bar body; And retainer ring, retainer ring has location hole, and wherein the end of outlet bar body is assemblied in the location hole of retainer ring along the axis direction of location hole; Wherein,
This end is formed with:
First limiting section, this first limiting section are used to limit the excessive deflection of the axis of outlet bar body with respect to the axis of location hole;
Second limiting section, this second limiting section and first limiting section are spaced apart, and are used to limit retainer ring excessively moving towards the direction of the other end relative with the end; And
Compartment, this compartment is between first limiting section and second limiting section.
According to a specific embodiment, the end is cylindrical, and first and second limiting sections are respectively outwards to protrude the first and second obstruct steps that form along the radial direction of cylinder-shaped end.
According to another specific embodiment, the end is cylindrical, and first and second limiting sections comprise several lug bosses that form along outside protrusion of radial direction of cylinder-shaped end respectively.For example, above-mentioned some lug bosses can be in the radial direction the some salient points of dispersed placement at cylinder-shaped end.
According to a specific embodiment, location hole further comprises first annular distance part and the second annular distance part, and wherein, the external diameter of first limiting section is less than the mean inside diameter of first annular distance part, thereby the assurance retainer ring can axially being free to slide along outlet bar body; Simultaneously, the external diameter of second limiting section is greater than the mean inside diameter of second annular distance part, thus the end that prevents retainer ring disengaging outlet bar body.
According to a specific embodiment, retainer ring can slide up and down along the axis direction of outlet bar body.
According to a specific embodiment, has the slit between the compartment of outlet bar body and the location hole of retainer ring.
According to a specific embodiment, retainer ring also comprises second location hole that is used to locate cable.
According to a specific embodiment, second location hole and first location hole have common axis.
The utility model has following technique effect at least: a kind of compound outlet bar that is integrated with retainer ring is provided, by being formed on two limiting sections (for example intercepting step) on the compound outlet bar, prevent retainer ring excessively moving with respect to the outlet bar, and be limited under the improper installation situation compound outlet bar with respect to the offset of retainer ring, prevent the dislocation of outlet bar, thereby avoid the various technical problems that occur in the above-mentioned background technology; Wherein, the retainer ring in the utility model has had the function of cable conductor retainer ring and electric stress control piece retainer ring in the prior art concurrently, has avoided multiple-piece design of the prior art, has simplified operation and has installed.In addition, the compound outlet bar that provides of the utility model can also be simplified the mounting process of gas or fluid insulation electric equipment cable termination.
Description of drawings
For above-mentioned and other purpose of the present utility model, feature and advantage can be become apparent more, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is the structural representation of traditional gas or liquid electric equipment cable termination;
Fig. 2 is the installation steps diagram of traditional gas or liquid electric equipment cable termination;
Fig. 3 is traditional gas or the liquid electric equipment cable termination outlet bar view when being in desirable installation site;
Fig. 3 a is a partial enlarged drawing among Fig. 3;
Fig. 4 shows the state when traditional gas or liquid electric equipment cable termination outlet bar are in the arranged in dislocation position;
Fig. 4 a is a partial enlarged drawing among Fig. 4;
Fig. 5 is the described structural representation that is used for the compound outlet bar of gas or fluid insulation electric equipment cable termination of specific embodiment of the utility model;
Fig. 6 is the exploded sketch of the described compound outlet bar of the above-mentioned specific embodiment of the utility model;
Fig. 7 is the installation steps diagram that adopts the gas or the liquid electric equipment cable termination of the described compound outlet bar of the above-mentioned specific embodiment of the utility model;
Fig. 8 shows the state when compound outlet bar in the gas that adopts the described compound outlet bar of the above-mentioned specific embodiment of the utility model or the liquid electric equipment cable termination is in improper installation site;
Fig. 8 a is a partial enlarged drawing among Fig. 8.
Embodiment
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish label is represented same or analogous element.The embodiment that describes below with reference to accompanying drawing is exemplary, is intended to explain the utility model, and can not be interpreted as a kind of restriction of the present utility model.
See also Fig. 5-8a, the utility model provides a kind of compound outlet bar that is used for gas or fluid insulation electric equipment cable termination.As shown in Figure 5 and Figure 6, this compound outlet bar 4 comprises outlet bar body 1 and retainer ring 2, and outlet bar body 1 has end 10, and wherein cable 5 is worn mast body 1 and passed through the end 10 of outlet bar body 1; And retainer ring 2 has location hole 20, and wherein the end 10 of outlet bar body 1 is assemblied in the location hole 20 of retainer ring 2 along the axis direction of location hole 20.According to the utility model, end 10 is formed with first limiting section 11, second limiting section 12 and compartment 13, the first limiting sections 11 and is used to limit the excessive deflection of the axis of outlet bar body 1 with respect to the axis of location hole 20; Second limiting section 12 and first limiting section 11 are spaced apart, and are used to limit retainer ring 2 excessively moving towards the direction of the other end relative with end 10; And compartment 13 is between first limiting section 11 and second limiting section 12.According to the utility model, as shown in Figure 7, this compound outlet bar is applied in the cable termination, correctly is connected with flow guiding disc 7 in the external insulator 8, makes loaded current be able to flow into flow guiding disc 7 fully from being crimped on the composite cable conductor.According to the utility model, compound outlet bar 4 mainly comprises outlet bar body 1 and 2 two parts of retainer ring, wherein, and as shown in Figure 6, retainer ring 2 was assemblied in out on the outlet bar body 1 of position limiting structure (for example obstruct groove) during fabrication, thereby formed a compound outlet bar 4.
According to this specific embodiment, as shown in Figure 5 and Figure 6, end 10 is cylindrical, first and second limiting sections 11,12 are respectively along the radial direction of cylinder-shaped end 10 and outwards protrude and the first and second obstruct steps 11,12 of formation, and obstruct step described herein is specially the annular projection that forms around cylinder-shaped end 10 in the present embodiment.Certainly, in another embodiment, end 10 is cylindrical, and first and second limiting sections 11,12 also can comprise several lug bosses that form along outside protrusion of radial direction of cylinder-shaped end 10 respectively.For example, above-mentioned some lug bosses can be in the radial direction the some salient points (not shown) of dispersed placement at cylinder-shaped end.According to this specific embodiment, location hole 20 further comprises the first annular distance part 201 and the second annular distance part 202, wherein, first intercepts the mean inside diameter of the external diameter of step (first limiting section) 11 less than the first annular distance part 201, thereby guarantees that retainer ring 2 can axially being free to slide along outlet bar body 1; Simultaneously, second intercepts the internal diameter of the external diameter of step (second limiting section) 12 greater than the second annular distance part 202, thereby prevents that retainer ring 2 breaks away from outlet bar body 1.According to the utility model, as Fig. 5 and shown in Figure 7, along with first of outlet bar body 1 intercepts axial be free to slide of step (first limiting section) 11 in the second annular distance part 202 of the location hole 20 of retainer ring 2, like this, intercept between the step (first and second limiting sections) 11,12 first and second, retainer ring 2 can slide up and down adjustable range according to the position of electric stress control piece 6.Simultaneously, there is a micro gap between compartment 13 that forms between first obstruct platform (first limiting section) rank 11 of outlet bar body 1 and the second obstruct step (second limiting section) 12 and the retainer ring 2, that is to say to have the slit between the second annular distance part 202 of the compartment 13 of outlet bar body 1 and the location hole 20 of retainer ring 2.So, can allow expanding with heat and contract with cold at cable termination outlet bar in service body 1.
In addition, according to the utility model, retainer ring 2 is all-in-one-piece retainer rings 2, has had the function of existing cable conductor retainer ring and electric stress control piece retainer ring concurrently.Particularly, retainer ring 2 comprises that also second location hole, 21, the second location holes 21 and first location hole 20 that are used to locate cable 5 have common axis except having location hole 20.Therefore, the retainer ring 2 in the utility model has had the function of cable conductor retainer ring and electric stress control piece retainer ring in the prior art concurrently, has avoided multiple-piece design of the prior art, has simplified operation and has installed.Correspondingly, the compound outlet bar 4 that provides of the utility model can also be simplified the mounting process of gas or fluid insulation electric equipment cable termination.What deserves to be mentioned is, in the present invention, be positioned at cable 5 in second location hole 5 except cable conductor, can also comprise the accessory that is arranged on the cable conductor outside, and cable conductor and these accessories are positioned in all in second location hole 21.As shown in Figure 7, retainer ring 2 will closely contact with the flow guiding disc 7 of external insulator 8 by second location hole 21.Retainer ring 2 can be made by macromolecular material, for example, and polytetrafluoroethylene.So, in the compound outlet bar 4 that the utility model provides, all-in-one-piece retainer ring 2 can also be simplified the mounting process of gas or fluid insulation electric equipment cable termination.
Therefore, in the compound outlet bar 4 that the utility model provides, on the outlet bar body 1 first intercepts step (first limiting section) thereby 11 cooperates with the location hole 21 of retainer ring 2 and to have limited outlet bar body 1 excessive deflection when mounted, and second on the outlet bar body 1 intercepts step (second limiting section) 12 and prevent that then retainer ring 2 is upwards excessive mobile.Therefore, when inserting cable 5 in the external insulator 8, the retainer ring 2 on the compound outlet bar 4 that the utility model provides will closely contact with the flow guiding disc 7 of external insulator 8, can import load current low-loss ground into flow guiding disc 7, sees Fig. 7.
The explanation that above-mentioned embodiment of the present utility model is only exemplary principle of the present utility model and effect thereof, but not be used to limit the utility model, know and it will be understood by those skilled in the art that, under the situation that does not depart from spirit and scope of the present utility model, any changes and improvements that the utility model is done are all in scope of the present utility model.Rights protection scope of the present utility model, should as the application claim defined is as the criterion.
Claims (8)
1. a compound outlet bar that is used for gas or fluid insulation electric equipment cable termination is characterized in that, described compound outlet bar comprises:
Outlet bar body (1) with end (10), wherein cable (5) passes through the described end (10) of described outlet bar body (1); With
Retainer ring (2), described retainer ring (2) has location hole (20), and the described end (10) of wherein said outlet bar body (1) is assemblied in the described location hole (20) of described retainer ring (2) along the axis direction of described location hole (20);
Described end (10) is formed with:
First limiting section (11), described first limiting section (11) are used to limit the excessive deflection of the axis of described outlet bar body (1) with respect to the axis of described location hole (20);
Second limiting section (12), described second limiting section (12) and described first limiting section (11) are spaced apart, and are used to limit described retainer ring (2) excessively moving towards the direction of the other end relative with described end (10); And
Compartment (13), described compartment (13) are positioned between described first limiting section (11) and described second limiting section (12).
2. compound outlet bar as claimed in claim 1, wherein:
Described end (10) is cylindrical, and described first and second limiting sections (11,12) are respectively along the radial direction of described cylinder-shaped end (10) and outwards protrude and the first and second obstruct steps (11,12) of formation.
3. compound outlet bar as claimed in claim 1, wherein:
Described end (10) is cylindrical, and described first and second limiting sections (11,12) comprise several lug bosses that form along outside protrusion of radial direction of described cylinder-shaped end (10) respectively.
4. compound outlet bar as claimed in claim 1, wherein:
Described location hole (20) further comprises first annular distance part (201) and second annular distance part (202), wherein, the external diameter of described first limiting section (11) is less than the mean inside diameter of described first annular distance part (201), thereby guarantees that described retainer ring (2) can axially being free to slide along described outlet bar body (1); Simultaneously, the external diameter of described second limiting section (12) is greater than the mean inside diameter of described second annular distance part (202), thus the described end (10) that prevents described retainer ring (2) the described outlet bar body of disengaging (1).
5. compound outlet bar as claimed in claim 1, wherein:
Described retainer ring (2) can slide up and down along the axis direction of described outlet bar body (1).
6. compound outlet bar as claimed in claim 1, wherein:
Has the slit between the described compartment (13) of described outlet bar body (1) and the described location hole (20) of described retainer ring (2).
7. as arbitrary described compound outlet bar among the claim 1-6, wherein:
Described retainer ring (2) also comprises second location hole (21) that is used to locate described cable (5).
8. compound outlet bar as claimed in claim 7, wherein:
Described second location hole (21) has common axis with described first location hole (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202661542U CN201789265U (en) | 2010-07-16 | 2010-07-16 | Composite outlet rod of cable terminal for gas or liquid insulating electrical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202661542U CN201789265U (en) | 2010-07-16 | 2010-07-16 | Composite outlet rod of cable terminal for gas or liquid insulating electrical device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201789265U true CN201789265U (en) | 2011-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202661542U Expired - Lifetime CN201789265U (en) | 2010-07-16 | 2010-07-16 | Composite outlet rod of cable terminal for gas or liquid insulating electrical device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201789265U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969690A (en) * | 2012-12-21 | 2013-03-13 | 江苏普朗克电力科技有限公司 | Outdoor terminal with reliable sealing structure |
-
2010
- 2010-07-16 CN CN2010202661542U patent/CN201789265U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969690A (en) * | 2012-12-21 | 2013-03-13 | 江苏普朗克电力科技有限公司 | Outdoor terminal with reliable sealing structure |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110406 |
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| CX01 | Expiry of patent term |