CN202905644U - Fuse tube for high voltage fuse - Google Patents
Fuse tube for high voltage fuse Download PDFInfo
- Publication number
- CN202905644U CN202905644U CN 201220529002 CN201220529002U CN202905644U CN 202905644 U CN202905644 U CN 202905644U CN 201220529002 CN201220529002 CN 201220529002 CN 201220529002 U CN201220529002 U CN 201220529002U CN 202905644 U CN202905644 U CN 202905644U
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- Prior art keywords
- fuse
- contact
- insulating cylinder
- barrel
- bottom contact
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Abstract
The utility model provides a fuse tube for a high voltage fuse, and that an insulating tube falls off from a lower contact and a fuse tube falls off from a main body insulator when a fuse element is blown can be prevented. According to the fuse tube for the high voltage fuse, an upper end of the insulating tube is fixed with a tubular upper contact through a fixed element, a lower contact passes through the insulating tube and is installed on the insulating tube, the lower contact is provided with an annular contact part, a lower end of the insulating tube is fixedly installed with a display tube, a spring is arranged between the lower contact and the display tube, and a fuse filled in the insulating tube is stretched between the upper contact and the lower contact through a spring. The contact part of the lower contact is provided with a sponge. The insulating tube is provided with a step part which presses against the sponge. Therefore the insulating tube is prevented from falling off from the lower contact when the fuse element is blown. In addition, the fuse tube is also prevented from falling off from the main body insulator.
Description
Technical field
The utility model relates to fuse barrel for high-voltage fuse.
Background technology
In the past, in order to protect power distribution transformer, used the high-tension fuse of in the main body insulator of porcelain system, taking in the fuse cylinder.The fuse cylinder is connected upper electrode with lower electrode.Be provided with the insulating cylinder that the top contact of tubulose is fixing in the upper end of fuse cylinder.The top contact is connected with upper electrode.Run through the bottom contact that the contact site with ring-type is installed at insulating cylinder.The bottom contact is connected with lower electrode.Be provided with restriction section with the contact site butt of bottom contact at the outer peripheral face of bottom contact.
Lower end at insulating cylinder is fixed with display barrel.Between bottom contact and display barrel, be provided with spring.In insulating cylinder, stretching between top contact and bottom contact by spring is provided with fuse.The electrical fuse element of fuse and fuse lead-in wire are cascaded.Front end at the fuse lead-in wire is provided with splicing ear.On the fixed part that is arranged on the contact of bottom, with the trip bolt splicing ear that is being fixedly clamped.The top contact of fuse cylinder and bottom contact are by fuse lead-in wire and electrical fuse element electrical connection.Electrical fuse element fuses when one has the electric current of overrate to flow through the distribution line that connects at once.
When the electrical fuse element of high-tension fuse fused, under the elastic force pressure and Action of Gravity Field of spring, insulating cylinder was mobile downwards with respect to the bottom contact that is connected with lower electrode.Mobile insulating cylinder stops to move downwards by the restriction section of insulating cylinder and the contact site butt of bottom contact downwards.The high-tension fuse that electrical fuse element has fused, mobile downwards by insulating cylinder, see display barrel from the lower ending opening section of main body insulator.
Patent documentation 1:200820116156.6
Yet, in above-mentioned patent documentation 1 described high-tension fuse, if the elastic force pressure of spring is large or the contact site damage of the restriction section of insulating cylinder and/or bottom contact, then when electrical fuse element fuses, insulating cylinder is not limited by the bottom contact, might come off from the bottom contact.In addition, even add the gas pressure that the gas that produces when being fused by electrical fuse element causes at the elastic force pressure by spring, so that in the situation that insulating cylinder is limited by the bottom contact, the fuse cylinder also might come off from the main body insulator because of the power of being used to downwards.So, require a kind of can prevent when electrical fuse element fuses insulating cylinder from the bottom contact come off, and the fuse barrel for high-voltage fuse that comes off from the main body insulator of fuse cylinder.
The utility model content
The utility model is made in light of this situation, and its purpose is, provides a kind of and can prevent that when electrical fuse element fuses insulating cylinder is from the bottom contact comes off and the fuse cylinder comes off from the main body insulator fuse barrel for high-voltage fuse.
The following describes to achieve these goals means and action effect thereof.
A kind of mode of the present utility model, be fixed with the top contact of tubulose by retaining element in the upper end of insulating cylinder, run through at described insulating cylinder the bottom contact is installed, this bottom contact has the contact site of ring-type, lower end at described insulating cylinder is fixedly mounted with display barrel, between described bottom contact and described display barrel, be provided with and suppress parts, the fuse that is seated in the described insulating cylinder stretches and is arranged between described top contact and the described bottom contact by the described parts that suppress, contact site at described bottom contact is provided with buffer unit, is provided with restriction section with described buffer unit butt in any one party of described insulating cylinder and described retaining element.
According to this structure, be provided with buffer unit at the contact site of the ring-type of bottom contact.Therefore, when electrical fuse element fuses, with respect to bottom contact mobile insulating cylinder downwards, when any one party restriction section in insulating cylinder and the retaining element and buffer unit butt, impact between restriction section and the contact site is cushioned parts and absorbs, impact is relaxed, and suppresses the damage of restriction section.Thus, even the elastic force pressure of spring is large, can prevent that also insulating cylinder from coming off.In addition, even the elastic force pressure of spring adds the gas pressure that the gas that produces when being fused by electrical fuse element causes, can prevent that also the fuse cylinder from coming off from the main body insulator.
In above-mentioned fuse barrel for high-voltage fuse, described buffer unit is arranged in the incorporating section in the contact site of described bottom contact.
According to this structure, buffer unit is arranged in the incorporating section in the contact site of bottom contact.Therefore, buffer unit does not expose, so when being inserted into the fuse cylinder in the main body insulator, buffer unit does not contact with the main body insulator, can prevent the buffer unit distortion.
In above-mentioned fuse barrel for high-voltage fuse, be provided with butt parts with described restriction section butt at the upper surface of described buffer unit.
According to this structure, be provided with the butt parts at the upper surface of buffer unit, so prevent the direct impact buffer component of restriction section, can suppress the distortion of buffer unit and deteriorated.
In above-mentioned fuse barrel for high-voltage fuse, described restriction section is arranged on the stage portion on the top of described insulating cylinder.
According to this structure, with the stage portion of insulating cylinder as restriction section.Therefore, even the contact site butt of the stage portion of insulating cylinder and bottom contact also can suppress the restriction section damage of insulating cylinder, can prevent that insulating cylinder from coming off.
In above-mentioned fuse barrel for high-voltage fuse, described restriction section is described retaining element.
According to this structure, with retaining element as restriction section.Therefore, even the contact site butt of retaining element and bottom contact can not damage yet, can prevent that insulating cylinder from coming off.
According to the utility model, in fuse barrel for high-voltage fuse, can prevent that when electrical fuse element fuses insulating cylinder comes off and the fuse cylinder comes off from the main body insulator from the bottom contact.
Description of drawings
Fig. 1 is the cutaway view of formation of high-tension fuse that the fuse barrel for high-voltage fuse of an execution mode of the present utility model has been installed.
Fig. 2 is the half sectional view of the formation of the fuse barrel for high-voltage fuse that do not fuse of expression fuse.
The half sectional view of the formation of the fuse barrel for high-voltage fuse when Fig. 3 is the expression blown fuse.
Fig. 4 is the half sectional view of the formation of the fuse barrel for high-voltage fuse after the expression blown fuse.
Fig. 5 is the half sectional view of the formation of the fuse barrel for high-voltage fuse after expression other routine blown fuses of the present utility model.
Fig. 6 is the half sectional view of the formation of the fuse barrel for high-voltage fuse after expression other routine blown fuses of the present utility model.
Fig. 7 is the half sectional view of the formation of the fuse barrel for high-voltage fuse after expression other routine blown fuses of the present utility model.
Symbol description
1... high-tension fuse, 10... main body insulator, 11... upper chambers, 12... bottom compartment, 12a... inwall, 13... upper end, 14... lower ending opening section, 15... lower sides, 16... fine protrusions, 17... adhesive, 18... insulation pleat, 21... upper mould cone, 23... upper electrode, 24... arc-extinguishing stick, 31... lower die cone, 34... lower electrode, 35... extinguishing arc cylinder, 37... lower electrode sheet, 39... liner, 40... fuse cylinder, 41... top contact, 42... insulating cylinder, 42a... stage portion, 43... retaining element, 43a... lower end, 44... fuse, 45... electrical fuse element, 46... fuse lead-in wire, 46a... splicing ear, 47... bottom contact, 47a... contact site, 47b... fixed part, 47c... incorporating section, 48... display barrel, 49... spring, 50... trip bolt, 55... close cover, 56... opening/closing portion, 60... sponge, 61... packing ring, 62... spring, 63... sponge, 63a... covering section.
Embodiment
The execution mode that the utility model is specialized is described below with reference to Fig. 1～Fig. 4.
As shown in Figure 1, the main body insulator 10 of the porcelain system of high-tension fuse 1 forms cylindric.Outer peripheral face at main body insulator 10 is formed with a plurality of insulation pleats 18.The lower ending opening of main body insulator 10 forms lower ending opening section 14.The inside of main body insulator 10 is formed with columned upper chambers 11 and columned bottom compartment 12, and bottom compartment 12 is communicated with the bottom of upper chambers 11, and its internal diameter enlarges greatlyr than upper chambers 11.
In high-tension fuse 1, taken in fuse cylinder 40 in the upper chambers 11 in main body insulator 10 and the bottom compartment 12.In high-tension fuse 1, be provided with upper electrode 23 and lower electrode 34.In the upper end 13 of main body insulator 10, pasting conical upper mould cone 21 by adhesive.The external cable that is connecting distribution line at the lead-out wire of upper mould cone 21.In addition, on the lower sides 15 of main body insulator 10, pasting conical lower die cone 31 by adhesive.On the lead-out wire of lower die cone 31, connecting the machines such as transformer that are located on the distribution line by external cable.
On lower electrode 34, be provided with the lower electrode sheet 37 of a plurality of leaf-spring-like.The elastic force pressure of contact site 47a by lower electrode sheet 37 that is arranged on the bottom contact 47 of fuse cylinder 40 kept by the mode of this lower electrode sheet 37 with clamping.Above lower electrode 34, be provided with resinous liner 39.
Be fixed with adhesive 17 at the inwall 12a of the bottom compartment 12 of main body insulator 10 and close cover 55, this closes the lower ending opening section 14 of cover 55 capping main body insulators 10.Close cover 55 and formed the round-ended cylinder shape by elastomeric elements such as the elastomeric material of flame retardancy or soft synthetic resins.Central authorities at the above-below direction of the outer peripheral face that closes cover 55 are formed with flange part 55a, and this flange part 55a is outstanding and in all-round formation to radial outside.In addition, with the inwall 12a that closes cover 55 opposed bottom compartment 12 on, be formed with fine protrusions 16.Fine protrusions 16 is to form by the fragment that the inwall 12a in bottom compartment 12 is fixedly mounted with insulator.
In the time of on will closing cover 55 and be installed to the lower ending opening section 14 of main body insulator 10, after the inwall 12a of bottom compartment 12 coating adhesive 17, be installed on the bottom compartment 12 of main body insulator 10 closing cover 55.When carrying out this installation, the upper surface by making the flange part 55a that closes cover 55 and the lower surface butt of main body insulator 10 determine to close the installation site of cover 55.Closing the adhesive 17 of the scheduled amount in slit between the inwall 12a of bottom compartment 12 of the outer peripheral face of cover 55 and main body insulator 10 fills and leads up.Thus, close on the inwall 12a of bottom compartment 12 that cover 55 is packed in main body insulator 10, bottom compartment 12 is capped.At this moment, closing cover 55 gives prominence to downwards than the lower ending opening section 14 of main body insulator 10.
In addition, be provided with radial joint-cutting 56a in the bottom of closing cover 55, form thus opening/closing portion 56.Opening/closing portion 56 fuse cylinder 40 grades by in open based on joint-cutting 56a, fuse cylinder 40 grades by after close.Opening/closing portion 56 formed by elastomeric element owing to closing cover 55, so can open and close by strain.Be formed with teat 55b cylindraceous in the lower end of closing cover 55.
Under fuse cylinder 40 was inserted into state in the main body insulator 10, top contact 41 can contact with upper electrode 23 with switching on, and bottom contact 47 can contact with lower electrode 34 with switching on.That is to say, under fuse cylinder 40 was housed in state in the main body insulator 10, upper electrode 23 and lower electrode 34 were by 40 electrical connections of fuse cylinder.
As shown in Figure 2, be formed with the incorporating section 47c of enlarged-diameter in the inboard of the contact site 47a of bottom contact 47.Incorporating section 47c the inboard of contact site 47a and bottom contact 47 axially on side opening.In the 47c of incorporating section, take in the circular sponge 60 as buffer unit.Upper surface in incorporating section 47c sponge 60 is provided with the shape packing ring 61 identical with the upper surface of sponge 60.Sponge 60 and packing ring 61 laminations are arranged in the 47c of incorporating section, and being positioned at packing ring 61 can be from outstanding position, the upper surface of contact site 47a.The internal diameter of the internal diameter of sponge 60 and packing ring 61 is set to insert and leads in the insulating cylinder 42, with the stage portion 42a butt of insulating cylinder 42.
The action of the fuse cylinder 40 when electrical fuse element 45 fuses then, is described with reference to Fig. 2～Fig. 4.
As shown in Figure 2, under the state that electrical fuse element 45 does not fuse, fuse 44 is in the state that is stretched and arranges.
In addition, bottom contact 47 is positioned at the bottom of fuse cylinder 40.
As shown in Figure 3, when because lightning impulse etc. causes being connected with the electric current that overrate is arranged in the distribution line of high-tension fuse 1 when flowing through, just fusing of electrical fuse element 45, thereby the tensioning state of fuse lead-in wire 46 is disengaged, under the effect of the elastic force of spring 49, only have insulating cylinder 42 to be forced downwardly direction and move.So under the state that the bottom of fuse cylinder 40 contact 47 is gripped by lower electrode 34, top contact 41 breaks away from from upper electrode 23.When insulating cylinder 42 moves downwards, the packing ring 61 in the contact site 47a of the step-like stage portion 42a bump bottom contact 47 of insulating cylinder 42.
During the upper surface of the stage portion 42a of insulating cylinder 42 bump packing ring 61, the upper surface butt of the lower surface of packing ring 61 and sponge 60 will be so the impact absorption of sponge 60 generation during with the stage portion 42a bump of insulating cylinder 42 will be impacted mitigation.In addition, because sponge 60 impact-absorbings and so that impact to relax, so fuse cylinder 40 power of being used to is downwards also relaxed simultaneously.So display barrel 48 exposes from the lower end of closing cover 55 of main body insulator 10.Thus, show the fusing of electrical fuse element 45 by display barrel 48.
As shown in Figure 4, absorbed the sponge 60 of impacting and be returned as original shape, the lower end of the stage portion 42a of insulating cylinder 42 is in the state with the upper surface butt of the packing ring 61 of the contact site 47a of bottom contact 47.
According to execution mode described above, can access following effect.
(1) is provided as the sponge 60 of buffer unit at the contact site of the ring-type of bottom contact 47, is provided with stage portion 42a as restriction section at insulating cylinder 42.Therefore, when electrical fuse element fused, with respect to bottom contact 47 downwards stage portion 42a and sponge 60 butts of mobile insulating cylinder 42, the impact between stage portion 42a and the contact site 47a was absorbed by sponge 60.Thus, even the elastic force pressure of spring 49 is large, impacts and relaxed, and can suppress the stage portion 42a damage of insulating cylinder 42, prevent that insulating cylinder 42 from coming off from bottom contact 47.In addition, even the gas pressure that the gas that the elastic force pressure of spring 49 produces when adding by electrical fuse element 45 fusing causes, because the impact when insulating cylinder 42 and bottom contact 47 butt is absorbed by sponge 60, so the power of being used to is downwards relaxed, prevents that fuse cylinder 40 from coming off from the main body insulator.
(2) sponge 60 is arranged on the interior incorporating section of contact site 47a of bottom contact 47.Therefore, sponge 60 can not expose, so fuse cylinder 40 is being inserted into main body insulator 10 when interior, sponge 60 does not contact with main body insulator 10, can prevent sponge 60 distortion.
(3) be provided with packing ring 61 as the butt parts at the upper surface of sponge 60, so prevent from directly clashing into sponge 60 as the stage portion 42a of restriction section, can suppress the distortion of sponge 60 and deteriorated.
(4) with packing ring 61 as the butt parts, so can suppress the distortion of sponge 60 and deteriorated by easy structure.
In addition, above-mentioned execution mode can be implemented according to the following mode of having carried out suitable change.
In the above-described embodiment, be provided with the stage portion 42a of the conduct restriction section that contacts with the contact site 47a of bottom contact 47 on the top of insulating cylinder 42, as shown in Figure 5, can at insulating cylinder 42 stage portion 42a be set yet, and with the lower end 43a of retaining element 43 as restriction section.Like this, even the contact site 47a butt of retaining element 43 and bottom contact 47 can not damage yet, can prevent that insulating cylinder 42 from coming off from bottom contact 47.In addition, can prevent that fuse cylinder 40 from coming off from main body insulator 10.
In the above-described embodiment, as buffer unit, adopt sponge 60, yet as shown in Figure 6, as buffer unit, also can substitute sponge 60, adopted spring 62.Like this, by the elastic force of change spring 62, can change the uptake of impact.
In addition, buffer unit can change to sponge 60, spring 62 other elastomeric materials in addition.
As shown in Figure 7, also can be used as the sponge 63 of buffer unit with the upper end covering of the contact site 47a of bottom contact 47.That is to say, at the rising wood of sponge 63, be provided with the 63a of covering section outstanding and that give prominence to the side downwards.Like this, can suppress sponge 63 breaks away from from contact site 47a because of the bump of insulating cylinder 42.
Claims (5)
1. fuse barrel for high-voltage fuse,
Be fixed with the top contact of tubulose by retaining element in the upper end of insulating cylinder, run through at described insulating cylinder the bottom contact is installed, this bottom contact has the contact site of ring-type, lower end at described insulating cylinder is fixedly mounted with display barrel, between described bottom contact and described display barrel, be provided with and suppress parts, the fuse that is seated in the described insulating cylinder stretches and is arranged between described top contact and the described bottom contact by the described parts that suppress, and described fuse barrel for high-voltage fuse is characterised in that
Contact site at described bottom contact is provided with buffer unit,
Be provided with restriction section with described buffer unit butt in any one party of described insulating cylinder and described retaining element.
2. fuse barrel for high-voltage fuse according to claim 1 is characterized in that,
Described buffer unit is arranged in the incorporating section in the contact site of described bottom contact.
3. fuse barrel for high-voltage fuse according to claim 2 is characterized in that,
Be provided with butt parts with described restriction section butt at the upper surface of described buffer unit.
4. the described fuse barrel for high-voltage fuse of any one according to claim 1～3 is characterized in that,
Described restriction section is arranged on the stage portion on the top of described insulating cylinder.
5. the described fuse barrel for high-voltage fuse of any one according to claim 1～3 is characterized in that,
Described restriction section is described retaining element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220529002 CN202905644U (en) | 2012-09-29 | 2012-09-29 | Fuse tube for high voltage fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220529002 CN202905644U (en) | 2012-09-29 | 2012-09-29 | Fuse tube for high voltage fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202905644U true CN202905644U (en) | 2013-04-24 |
Family
ID=48126278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220529002 Expired - Fee Related CN202905644U (en) | 2012-09-29 | 2012-09-29 | Fuse tube for high voltage fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202905644U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106128901A (en) * | 2016-08-24 | 2016-11-16 | 辽宁华隆电力科技股份有限公司 | A kind of two-part insulating ceramic and upper locking injection fuse box |
-
2012
- 2012-09-29 CN CN 201220529002 patent/CN202905644U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106128901A (en) * | 2016-08-24 | 2016-11-16 | 辽宁华隆电力科技股份有限公司 | A kind of two-part insulating ceramic and upper locking injection fuse box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20170929 |