CN203165832U - High voltage fuse - Google Patents
High voltage fuse Download PDFInfo
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- CN203165832U CN203165832U CN 201320090758 CN201320090758U CN203165832U CN 203165832 U CN203165832 U CN 203165832U CN 201320090758 CN201320090758 CN 201320090758 CN 201320090758 U CN201320090758 U CN 201320090758U CN 203165832 U CN203165832 U CN 203165832U
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- tension fuse
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Abstract
The utility model relates to a high voltage fuse. When the load disconnection operation of a distribution circuit and some disassembly operations such as replacement of a fuse tube, are performed, an operation rod is easily inserted and pulled out with respect to a main body insulator. The high voltage fuse comprises a cylindrical main insulator (1), wherein an upper electrode is fixed on the upper end and a lower electrode is fixed on the side surface of the lower part of the insulator; and a bottom-cylindrical capping component (60) for capping a lower-end opening part (14) of the main body insulator (10). A plurality of slices (67) are formed on the bottom of the capping component (60) by radial slits (66). An opening/closing part (64) for opening/closing the slices (67) is arranged on the bottom of the capping component (60). A plurality of projections (68) are arranged on the lower surface (64a) of the opening/closing part (64). Thus, the operation rod is easily inserted and pulled out with respect to the main body insulator (10).
Description
Technical field
The utility model relates to high-tension fuse.
Background technology
In the past, known promising protection power distribution transformer arranged, was taking in the high-tension fuse of fuse tube in porcelain main body insulator processed.Be provided with upper electrode and lower electrode in this high-tension fuse.The fuse tube is connected upper electrode with lower electrode.In the upper end of fuse tube, be provided with the insulating cylinder of having fixed the tubular upper contact.In insulating cylinder, run through that the bottom contact with ring-type contact site being installed.Lower end at insulating cylinder is fixed with display barrel.Between bottom contact and display barrel, be provided with the parts of energizing.In insulating cylinder, between top contact and bottom contact, be provided with fuse by the parts stretching of energizing.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, the binding terminal has been fixedly clamped.
Cover is fixedly closed in lower end at the main body insulator.Close cover with the lower ending opening portion capping of main body insulator.Be provided with switching portion in the bottom surface of closing cover, this switching portion forms joint-cutting radially and opens and closes by being.When the load opening operation of the distribution line in carrying out high-tension fuse, the handling operations such as replacing of fuse tube, operator is climbed up electric pole and is carried out operation safely and use hook stick.When using hook stick to load and unload the fuse tube, the switching portion that makes the hook stick pushing close cover, portion opens with switching, is inserted in the main body insulator.
The patent documentation 1:ZL patent No. 201120493783.3
Yet, in above-mentioned high-tension fuse, make hook stick pushing close the switching portion of cover and when being inserted into the main body insulator in and since contacted with the periphery of hook stick by the section of the joint-cutting cutting of switching portion cause impedance greatly, be difficult to insertion.In addition, in above-mentioned high-tension fuse, when the hook stick in will being inserted into the main body insulator was extracted, the section of the switching portion that contacts with the periphery of hook stick was difficult to take out to the direction displacement of closing.Therefore, wish to have a kind of high-tension fuse that can make hook stick insert and extract with respect to the main body insulator easily.
The utility model content
The utility model is In view of the foregoing made, its purpose is, a kind of high-tension fuse is provided, when carrying out the handling operations such as replacing of the load opening operation of distribution line, fuse tube, carries out hook stick easily with respect to the insertion of main body insulator and extract.
Below, the mode and the action effect thereof that are used for realizing above-mentioned purpose are described.
Solve the high-tension fuse of above-mentioned problem, possess: main body insulator cylindraceous, fixedly there is upper electrode its upper end, and fixedly there is lower electrode side, its underpart; And the cover that closes that bottom tube-like is arranged, it will be formed at the peristome capping of the lower end of described main body insulator, in the described bottom of closing cover, be formed with a plurality of sections by radial joint-cutting, the described bottom of closing cover becomes the switching portion that can open and close by described section, is provided with a plurality of projections or prominent bar at the lower surface of described switching portion.
According to this structure, be provided with a plurality of projections or prominent bar at the lower surface of the switching portion that closes cover.Therefore, when carrying out the handling operations such as replacing of the load opening operation of distribution line, fuse tube, make the hook stick pushing be provided with the switching portion that closes cover of a plurality of projections or prominent bar, hook stick is inserted in the main body insulator.At this moment, a plurality of projections or prominent bar contact with the periphery of hook stick, and point contacts or line contacts thereby section and the periphery of hook stick are not that face contact, can reduce contact area, so can reduce contact impedance.In addition, when the hook stick in will being inserted into the main body insulator is extracted, contact with the periphery of hook stick and the section of the switching portion that opens to the direction displacement of closing.At this moment, a plurality of projections or prominent bar contact with the periphery of hook stick, thereby section and the periphery of hook stick are not faces contact but put to contact, and can reduce contact area, so can alleviate contact impedance.Thus, can easily hook stick be inserted into the main body insulator, and easily hook stick be extracted from the main body insulator.
In above-mentioned high-tension fuse, preferably be provided with radial groove in the described bottom of closing cover, form described joint-cutting at described groove.
According to this structure, the radial groove that is formed with joint-cutting is arranged at the bottom of closing cover.Therefore, owing to form joint-cutting along groove, so carry out the joint-cutting operation easily.In addition, the section of joint-cutting is difficult to see because of groove, so can keep outward appearance good.
In above-mentioned high-tension fuse, the preferred described cover that closes possesses: stationary magazine creel cylindraceous portion is installed in the lower inner wall of described main body insulator; And expose a portion, and continuous with described stationary magazine creel portion, expose to the outside of described main body insulator, and a described portion of exposing has described switching portion, the described internal diameter that exposes a portion forms greatlyyer than the internal diameter of described stationary magazine creel portion.
According to this structure, the internal diameter that will expose a portion forms greatlyyer than the internal diameter of stationary magazine creel portion.Therefore, compare with the situation that forms switching portion in stationary magazine creel portion, can increase the length of the section of switching portion.Thus, bending becomes easily, so can reduce contact impedance.
In above-mentioned high-tension fuse, the described switching of the ratio portion in the preferred described described inwall that exposes a portion that closes cover forms the taper surface continuous with the inwall of described stationary magazine creel portion by the part of described stationary magazine creel portion side.
According to this structure, the inwall that exposes a portion that closes cover forms taper surface.Therefore, when inserting hook stick, fuse tube, by taper surface hook stick, fuse tube are directed to the central authorities of main body insulator, insert operation easily.
In above-mentioned high-tension fuse, preferably on described lower electrode, by the fixedly connected lower die awl of fixed part, form accommodating groove on the described outer wall top of closing the described stationary magazine creel portion of cover, this accommodating groove is taken in described fixed part.
According to this structure, formed accommodating groove on the outer wall top of the stationary magazine creel portion that closes cover.Therefore, can not close cover and fixed part butt and crooked situation, can positively be fixed on the main body insulator with closing cover.
In above-mentioned high-tension fuse, preferably be provided with flange part on the described described outer wall top of exposing a portion of closing cover, be provided with described teat or the slot part that closes the installation direction of cover of expression at the lower surface of described flange part.
According to this structure, be provided with teat or slot part at the lower surface of flange part.Therefore, by teat or slot part are served as a mark, will close cover and be installed on the main body insulator, thereby the accommodating groove that closes cover is alignd with fixed part.
In above-mentioned high-tension fuse, it is the taper shape on summit that the preferred described described switching portion that closes cover forms with central authorities.
According to this structure, the switching portion that closes cover forms taper shape.Therefore, can suppress section because of the sagging switching portion opening that causes of deterioration year in year out.Thus, can suppress dust, rainwater etc. enters in the main body insulator from the switching portion that closes cover.
In above-mentioned high-tension fuse, preferably be formed with a plurality of projections or prominent bar at the described upper surface that closes the described switching portion of cover.
According to this structure, be formed with a plurality of projections or prominent bar at the upper surface of the switching portion that closes cover.Therefore, when the hook stick in will being inserted into the main body insulator was extracted, the periphery of hook stick might contact with the upper surface of the switching portion that is provided with a plurality of projections or prominent bar.At this moment, a plurality of projections or prominent bar contact with the periphery of hook stick, thereby can reduce contact area than comparing with whole situation about contacting of section, can alleviate contact impedance.Thus, can easily extract hook stick from the main body insulator.
In above-mentioned high-tension fuse, preferably the described cover that closes is provided with a plurality of described switching portion.
According to this structure, close cover and be provided with a plurality of switching portion.Therefore, can suppress dust, rainwater etc. enters in the main body insulator from the switching portion that closes cover.
The utility model effect
According to the utility model, when carrying out the handling operations such as replacing of the load opening operation of distribution line, fuse tube, can easily carry out hook stick with respect to the insertion of main body insulator and extract.
Description of drawings
Fig. 1 is the cutaway view of the summary structure of expression high-tension fuse.
Fig. 2 is the amplification view of the structure of closing cover of expression high-tension fuse.
Fig. 3 is the amplification view of structure of the switching portion that closes cover of expression high-tension fuse.
Fig. 4 is the upward view of the lower surface that closes cover of expression high-tension fuse.
Fig. 5 is the end view of the structure of closing cover of expression high-tension fuse.
Fig. 6 is that the expression hook stick is with respect to the cutaway view of the insertion state of high-tension fuse.
Fig. 7 is the cutaway view of the structure of closing cover of expression high-tension fuse.
Fig. 8 is the amplification view of structure of the switching portion that closes cover of expression high-tension fuse.
Fig. 9 is the cutaway view of the structure of closing cover of expression high-tension fuse.
Figure 10 is the lower surface figure of the lower surface that closes cover of expression high-tension fuse.
Description of reference numerals
1 ... high-tension fuse, 10 ... the main body insulator, 11 ... upper chambers, 12 ... bottom compartment, 12a ... inwall, 13 ... the upper end, 14 ... lower ending opening portion, 14a ... the lower surface, 15 ... lower sides, 16 ... micro crowning, 17 ... adhesive, 18 ... the insulation pleat, 21 ... the upper mould awl, 21a ... lead-out wire, 23 ... upper electrode, 31 ... the lower die awl, 31a ... lead-out wire, 32 ... connecting line, 33 ... tetragonal nut, 34 ... lower electrode, 35 ... the extinguishing arc tube, 36 ... buffer unit, 37 ... buffer board, 40 ... the fuse tube, 41 ... the top contact, 42 ... insulating cylinder, 44 ... fuse, 45 ... electrical fuse element, 46 ... the fuse lead-in wire, 46a ... splicing ear, 47 ... the bottom contact, 47a ... contact site, 47b ... fixed part, 48 ... display barrel, 49 ... spring, 50 ... trip bolt, 55 ... part is installed, 60 ... close cover, 61 ... stationary magazine creel portion, 61a ... groove, 61b ... accommodating groove, 62 ... expose a portion, 62a ... taper surface, 63 ... flange part, 63a ... upper surface, 63b ... lower surface, 63c ... projecting strip part, 64 ... switching portion, 64a ... lower surface, 64b ... upper surface, 65 ... groove, 66 ... joint-cutting, 67 ... section, 68 ... projection, 69 ... prominent bar, 70 ... hook stick, 71 ... chimeric cartridge unit.
Embodiment
As shown in Figure 1, the porcelain of high-tension fuse 1 main body insulator 10 processed 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 portion 14.In the inside of main body insulator 10, be formed with columned upper chambers 11 and columned bottom compartment 12, bottom compartment 12 is communicated with the bottom of upper chambers 11, and its internal diameter enlarges greatlyyer than upper chambers 11.High-tension fuse 1 is installed on the carriage of electric pole by part 55 is installed.Installation part 55 is fixed on the periphery of the above-below direction central authorities of main body insulator 10.
In high-tension fuse 1, taken in fuse tube 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 awl 21 by adhesive.The external cable that is connecting distribution line at the lead-out wire 21a of upper mould awl 21.In addition, on the lower sides 15 of main body insulator 10, pasting conical lower die awl 31 by adhesive.Cardinal extremity at the lead-out wire 31a of lower die awl 31 is connected with connecting line 32.The connecting line 32 of lower die awl 31 is fixed on the lower electrode 34 by screw.Connecting line 32 is fixed in the main body insulator 10 by the tetragonal nut 33 as fixed part.Lower die awl 31 is fixed on the main body insulator 10 by tetragonal nut 33.On the lead-out wire 31a of lower die awl 31, connecting the machines such as transformer that are located on the distribution line by external cable.Lower electrode 34 is by the chimeric bottom compartment 12 that is limited in the main body insulator 10.Dispose resinous buffer unit 36 on the top of lower electrode 34.Buffer unit 36 is across the top butt of buffer board 37 with bottom compartment 12.
On the inwall 12a of the bottom compartment 12 of main body insulator 10, be fixed with adhesive 17 and close cover 60, this closes cover 60 with lower ending opening portion 14 cappings of main body insulator 10.Close cover 60 and formed the round-ended cylinder shape by the elastomeric material of crack resistance or soft elastomeric elements such as synthetic resin.
As shown in Figure 2, closing cover 60 possesses: be fixed on the stationary magazine creel portion 61 on the main body insulator 10; And expose a portion 62, continuous with stationary magazine creel portion 61, and expose to the outside of main body insulator 10.In exposing a portion 62, be provided with the bottom with lower ending opening portion 14 cappings of main body insulator 10.In the above-below direction central authorities of the outer peripheral face that closes cover 60, be formed with to the outstanding flange part 63 of radial outside along whole Zhou Fangxiang.Flange part 63 is positioned at stationary magazine creel portion 61 and exposes the continuous part of a portion 62.Stationary magazine creel portion 61, expose a portion 62 and flange part 63 forms as one by the rubber-like insulating material.Periphery in stationary magazine creel portion 61 is formed with slot part 61a.The inner diameter D 2 of exposing a portion 62 forms the 1 big (D2＞D1) of inner diameter D than stationary magazine creel portion 61.Therefore, the situation than switching portion is set in stationary magazine creel portion 61 can increase switching portion 64.
Be formed with micro crowning 16 with the inwall 12a that closes cover 60 opposed bottom compartment 12.Micro crowning 16 installs insulator De Po crushed sheet by the inwall 12a in bottom compartment 12 and forms.In the time will closing cover 60 and be installed in the lower ending opening portion 14 of main body insulator 10, coating adhesive 17 on the inwall 12a of bottom compartment 12 is installed to the stationary magazine creel portion 61 that closes cover 60 bottom compartment 12 of main body insulator 10.When mounted, the upper surface 63a by making the flange part 63 that closes cover 60 and the lower surface 14a butt of main body insulator 10 decide the installation site of closing cover 60.Close adhesive 17 landfills of the scheduled amount in slit between the inwall 12a of bottom compartment 12 of the outer peripheral face of cover 60 and slot part 61a and main body insulator 10.Thus, close on the inwall 12a of bottom compartment 12 that cover 60 is fixed on main body insulator 10, bottom compartment 12 is capped.At this moment, the portion 62 of exposing that closes cover 60 gives prominence to downwards than the lower ending opening portion 14 of main body insulator 10.
The inwall that exposes a portion 62 is provided with taper surface 62a, and taper surface 62a's is more continuous with the inwall of stationary magazine creel portion 61 by the part of stationary magazine creel portion 61 sides than switching portion 64.Therefore, when inserting hook stick or fuse tube 40, can hook stick or fuse tube 40 be directed to the central authorities of main body insulator 10 by taper surface 62a.
As shown in Figure 3 and Figure 4, the lower surface in the bottom of closing cover 60 is formed with the radial groove 65 that the bottom has been carried out 8 five equilibriums.Form joint-cutting 66 at this groove 65, thereby form a plurality of sections 67.Joint-cutting 66 forms by hand or machinery along groove 65.Therefore, can easily form joint-cutting 66 by groove 65.In addition, the section of joint-cutting 66 is difficult in sight because of groove 65.
The bottom of closing cover 60 becomes can be by the 67 switching portions 64 that open and close of cutting into slices.By joint-cutting 66, switching portion 64 opens when butts such as fuse tube 40 or hook sticks 70 and when inserting, and switching portion 64 closes when fuse tube 40, hook stick 70 etc. is extracted.Switching portion 64 closes cover 60 and formed by elastomeric element, so can open and close by strain.
As shown in Figure 5, be formed with accommodating groove 61b on the periphery top of the slot part 61a of the stationary magazine creel portion 61 that closes cover 60, accommodating groove 61b takes in tetragonal nut 33.Therefore, the situation that the stationary magazine creel portion 61 of cover 60 is out of shape with tetragonal nut 33 butts can not appear closing.In addition, accommodating groove 61b and adhesive 17 suppress tetragonal nut 33 rotations, so can suppress 31 rotations of lower die awl.
As shown in Figure 4 and Figure 5, be provided with projecting strip part 63c as teat at the lower surface 63b of the flange part 63 that closes cover 60, projecting strip part 63c represents to close cover 60 with respect to the installation direction of main body insulator 10.Projecting strip part 63c is arranged on the position identical with accommodating groove 61b at the circumferencial direction that closes cover 60.Projecting strip part 63c is along from the radially extension setting towards the edge portion of flange part 63 of the outer surface that exposes a portion 62.Therefore, in the time will closing cover 60 and install on the main body insulator 10, projecting strip part 63c can be served as a mark, take in the mode of tetragonal nut 33 with accommodating groove 61b and install.
The effect of the high-tension fuse 1 that constitutes in the above described manner then, is described.
When in high-tension fuse 1, having overcurrent to flow through, electrical fuse element 45 fusing of fuse 44.At this moment, the tensioning state of fuse lead-in wire 46 is disengaged, and the insulating cylinder 42 of fuse tube 40 is mobile downwards under the elastic force effect of spring 49.The insulating cylinder 42 of fuse tube 40 forces to move to the position of being ended by bottom contact 47 cards.Top contact 41 breaks away from from upper electrode 23, and insulating cylinder 42 is outstanding to the below of main body insulator 10.At this moment, by pressing of display barrel 48, the switching portion 64 that closes cover 60 is open, and display barrel 48 is outstanding from closing cover 60.Therefore, electrical fuse element 45 from high-tension fuse 1 to the outside that report has fused.Operator can be by coming Visual Confirmation to have overcurrent to pass through to the outstanding display barrel 48 in the below of main body insulator 10.
Operation when then, record is for example loaded opening operation to distribution line in construction etc.
As shown in Figure 6, when for example in construction etc., distribution line being loaded opening operation, use the hook stick 70 chimeric with the bottom contact 47 of fuse tube 40.Be provided with the chimeric cartridge unit 71 that bottom contact 47 is chimeric at the leading section of hook stick 70.
Make the chimeric cartridge unit 71 of hook stick 70 push the switching portion 64 that closes cover 60, when the section 67 of switching portion 64 is pushed open to the inside, hook stick 70 is inserted into the inside of closing cover 60.And, the chimeric cartridge unit 71 of hook stick 70 is fitted to bottom contact 47.At this moment, Yi Bian be inserted into the outer surface of the chimeric cartridge unit 71 of the hook stick 70 that closes cover 60 inside and contact with the projection 68 of the section 67 of switching portion 64 on one side and insert.Therefore, section 67 and the periphery of the chimeric cartridge unit 71 of hook stick 70 are not that face contact but puts and contacts, and can easily insert hook stick 70.
Then, under this chimerism, when hook stick 70 was pulled down, the releasing that engages of lower electrode 34 and bottom contact 47 was so can pull out fuse tube 40 from high-tension fuse 1.At this moment, Yi Bian the outer surface that is inserted into the chimeric cartridge unit 71 of the hook stick 70 that closes cover 60 inside and fuse tube 40 contacts with the projection 68 of the section 67 of switching portion 64 on one side is drawn out.And by the chimeric cartridge unit 71 of hook stick 70 and pulling out of fuse tube 40, the section 67 of switching portion 64 is to the direction displacement of closing.But, because section 67 becomes point to contact with the chimeric cartridge unit 71 of hook stick 70 and the periphery of fuse tube 40, so chimeric cartridge unit 71 and the fuse tube 40 of hook stick 70 easily can be pulled out.
When being installed to fuse tube 40 on the high-tension fuse 1, the chimeric cartridge unit 71 of hook stick 70 is fitted to the bottom contact 47 of fuse tube 40.Make the front end of fuse tube 40 push the switching portion 64 that closes cover 60, when the section 67 of switching portion 64 is pushed open to the inside, the chimeric cartridge unit 71 of fuse tube 40 and hook stick 70 is inserted into the inside of bottom compartment 12.When carrying out this insertion, be directed to the central authorities of main body insulator 10 by a plurality of sections 67 and taper surface 62a.Then, with lower electrode 34 and the 47 engaging clampings of bottom contact, fuse tube 40 is remained in the main body insulator 10.
Then, with the chimeric releasing between the chimeric cartridge unit 71 of bottom contact 47 and hook stick 70, under the state that keeps fuse tube 40 is installed on the high-tension fuse 1, only hook stick 70 is extracted in main body insulator 10.At this moment, identical when unloading fuse tube 40, section 67 becomes to put with the periphery of chimeric cartridge unit 71 and fuse tube 40 and contacts, and can easily insert and pull out.In addition, need to change fuse tube 40 grades in electrical fuse element 45 fusing and when unloading fuse tube 40 or also identical when being installed to fuse tube 40 on the high-tension fuse 1.
According to the execution mode of above explanation, can access following effect.
(1) a plurality of projections 68 have been formed at the lower surface 64a of the switching portion 64 that closes cover 60.Therefore, when carrying out the handling operations such as replacing of the load opening operation of distribution line, fuse tube 40, the switching portion 64 that makes hook stick 70 pushings close cover 60.So a plurality of projections 68 contact with the periphery of hook stick 70,67 not that face contacts but some contact with the periphery of hook stick 70 thereby cut into slices.Thus, contact area can be reduced, contact impedance can be alleviated.In addition, when the hook stick 70 in will being inserted into main body insulator 10 is extracted, contact with the periphery of hook stick 70 and the section 67 of the switching portion 64 that opens to the direction displacement of closing.Even in this case, because a plurality of projections 68 contacts with the periphery of hook stick 70, do not contact but put and contact so section and the periphery of hook stick are not faces, can reduce contact area, can alleviate contact impedance.Thus, hook stick 70 can be easily inserted in the main body insulator 10, hook stick 70 easily can be extracted from main body insulator 10.
(2) the radial groove 65 that is formed with joint-cutting 66 is arranged at the bottom of closing cover 60.Therefore, owing to form joint-cutting 66 along groove 65, so form joint-cutting 66 easily.In addition, the section of joint-cutting 66 is difficult to see because of groove 65, so can keep outward appearance good.
(3) inner diameter D 2 of exposing a portion 62 forms greatlyyer than the inner diameter D 1 of stationary magazine creel portion 61.Therefore, than the situation that forms switching portion 64 in stationary magazine creel portion 61, can increase the length of the section 67 of switching portion 64.Thus, because the length of section 67 is elongated, so bending easily can reduce contact impedance.
(4) inwall that exposes a portion 62 that closes cover 60 forms taper surface.Therefore, when inserting hook stick 70 or fuse tube 40, by taper surface hook stick 70 or fuse tube 40 are directed to the central authorities of main body insulator 10, insert operation easily.
(5) formed accommodating groove 61b on the outer wall top of the stationary magazine creel portion 61 that closes cover 60.Therefore, can not close cover 60 and be out of shape as tetragonal nut 33 butts of fixed part and crooked situation, can positively be fixed on main body insulator 10 with closing cover 60.
(6) be provided with projecting strip part 63c as teat at the lower surface 63b of flange part 63.Therefore, 63c serves as a mark with projecting strip part, will close cover 60 and be installed on the main body insulator 10, thereby the accommodating groove 61b that closes cover 60 is alignd with tetragonal nut 33 as fixed part.
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, being provided with projecting strip part 63c at the lower surface 63b of the flange part 63 that closes cover 60, yet being not limited to the teat of prominent bar, also can be rectangular-shaped teat or columned teat.In addition, being not limited to teat, also can be slot part.
In the above-described embodiment, as teat, projecting strip part 63c is arranged on the lower surface 63b of the flange part 63 that closes cover 60, yet also teat can be arranged on the side of the flange part 63 that closes cover 60.
In the above-described embodiment, formed accommodating groove 61b in the stationary magazine creel portion 61 that closes cover 60, accommodating groove 61b will bore 31 tetragonal nuts of fixing 33 as fixed part to lower die and take in.Form the length that does not contact with tetragonal nut 33 if close the stationary magazine creel portion 61 of cover 60, then also the formation of accommodating groove 61b can be omitted.
In the above-described embodiment, be provided with taper surface 62a at the inwall that exposes a portion 62 that closes cover 60, this taper surface 62a is connected the inner diameter D 1 of stationary magazine creel portion 61 with inner diameter D 2 these two different inner diameters that expose a portion 62.But, can at the inwall that exposes a portion 62 taper surface 62a be set yet, but by the different stationary magazine creel portion of internal diameter 61 with expose a portion 62 and form stage portion.
In the above-described embodiment, the inner diameter D 2 that will expose a portion 62 is made as the 1 big (D1＜D2) of inner diameter D than the stationary magazine creel portion 61 that closes cover 60.Also the inner diameter D 1 of stationary magazine creel portion 61 can be made as identical (D1=D2) with the inner diameter D 2 of exposing a portion 62.
In the above-described embodiment, carrying out the mode of 8 five equilibriums and groove 65 is set with the switching portion 64 that will close cover 60, and formed joint-cutting 66 at groove 65, yet be not limited to 8 five equilibriums, also can be other five equilibriums that grade such as 4 five equilibriums or 6.In addition, be not limited to switching portion 64 is carried out five equilibrium, the section 67 of switching portion 64 also can form different sizes.
In the above-described embodiment, the lower surface in the bottom of the switching portion 64 that closes cover 60 is provided with groove 65, yet as long as can easily form joint-cutting 66, can adopt Any shape.In addition, also can omit the formation of groove 65.
In the above-described embodiment, the switching portion 64 that closes cover 60 is formed level, however also can be as shown in Figure 7, the switching portion 64 that closes cover 60 is formed taper shape towards the top.Like this, even under the sagging situation, also can suppress switching portion 64 and open along with deterioration year in year out in section 67.Thus, can suppress dust, rainwater etc. enters in the main body insulator 10 from the switching portion 64 that closes cover 60.
In the above-described configuration, as shown in Figure 8, also can be near the central authorities of the upper surface 64b of the switching portion 64 that closes cover 60 a plurality of projections 68 of formation.Like this, when the hook stick 70 in will being inserted into main body insulator 10 and fuse tube 40 are extracted, section 67 is to turning in, even the periphery of hook stick 70 and fuse tube 40 contacts with the upper surface 64b of the switching portion 64 that closes cover 60, a plurality of projections 68 also can contact with the periphery of hook stick 70.Thus, section 67 and the periphery of hook stick 70 and fuse tube 40 are not that face contact but put to contact, and can reduce contact area, can alleviate contact impedance.Thus, can easily extract hook stick 70 and fuse tube 40 from main body insulator 10.
In the above-described embodiment, only near the central authorities of the upper surface 64b of switching portion 64, formed projection 68, yet also can form projection 68 at the entire upper surface 64b of switching portion 64.
In the above-described embodiment, formed projection 68 whole of the lower surface 64a of switching portion 64, however also can be only near the central authorities of the lower surface 64a of switching portion 64 formation projection 68.
In the above-described embodiment, be provided with 1 switching portion 64 closing cover 60, yet as shown in Figure 9, also can a plurality of switching portion 64 be set closing cover 60.At this moment, the position of joint-cutting 66 can be the same or different.Like this, can further suppress dust, rainwater etc. enters in the main body insulator 10 from the switching portion 64 that closes cover 60.
In the above-described embodiment, be provided with a plurality of projections 68 in switching portion 64, yet as shown in figure 10, also can a plurality of prominent bars 69 be set in switching portion 64.For example, prominent bar 69 is radial setting from the central authorities of switching portion 64.Like this, when 40 pushings of hook stick 70 and fuse tube be provided with a plurality of prominent bars 69 close the switching portion 64 of cover 60 time, a plurality of prominent bars 69 contact with the periphery of hook stick 70 and fuse tube 40.Thus, section 67 and the periphery of hook stick 70 are not that face contacts but line contacts, and can reduce contact area, can alleviate contact impedance.In addition, the section 67 of the switching portion 64 that opens even contact with the periphery of hook stick 70 and fuse tube 40 is to the direction displacement of closing, and a plurality of prominent bars 69 still contact with the periphery of hook stick 70 and fuse tube 40.Thus, section 67 contacts with the outer peripheral face of hook stick 70 and fuse tube 40 rather than line contacts, and can reduce contact area, can alleviate contact impedance.
In the above-described embodiment, also can be on the same one side of switching portion 64 projection and the combination of prominent bar be arranged, a side in projection and the prominent bar and another face in the top and bottom of switching portion 64 also can be set at a face of the top and bottom of switching portion 64 the opposing party in projection and the prominent bar is set.
In the above-described embodiment, with switching portion 64 with close cover 60 and form as one, separately form yet also can and close cover 60 with switching portion 64.
Claims (9)
1. high-tension fuse possesses: main body insulator cylindraceous, and fixedly there is upper electrode its upper end, and fixedly there is lower electrode side, its underpart; And the cover that closes that bottom tube-like is arranged, it will be formed at the peristome capping of the lower end of described main body insulator, and described high-tension fuse is characterised in that,
In the described bottom of closing cover, be formed with a plurality of sections by radial joint-cutting,
The described bottom of closing cover becomes the switching portion that can open and close by described section,
Lower surface in described switching portion is provided with a plurality of projections or prominent bar.
2. high-tension fuse according to claim 1 is characterized in that,
Be provided with radial groove in the described bottom of closing cover,
Form described joint-cutting at described groove.
3. high-tension fuse according to claim 2 is characterized in that,
The described cover that closes possesses:
Stationary magazine creel cylindraceous portion is installed in the lower inner wall of described main body insulator; And
Expose a portion, continuous with described stationary magazine creel portion, expose to the outside of described main body insulator, and a described portion of exposing has described switching portion,
The described internal diameter that exposes a portion forms greatlyyer than the internal diameter of described stationary magazine creel portion.
4. high-tension fuse according to claim 3 is characterized in that,
The described switching of ratio portion in the described described inwall that exposes a portion that closes cover forms the taper surface continuous with the inwall of described stationary magazine creel portion by the part of described stationary magazine creel portion side.
5. high-tension fuse according to claim 4 is characterized in that,
On described lower electrode, by the fixedly connected lower die awl of fixed part,
Form accommodating groove on the described outer wall top of closing the described stationary magazine creel portion of cover, this accommodating groove is taken in described fixed part.
6. high-tension fuse according to claim 5 is characterized in that,
Be provided with flange part on the described described outer wall top of exposing a portion of closing cover,
Lower surface at described flange part is provided with described teat or the slot part that closes the installation direction of cover of expression.
7. high-tension fuse according to claim 6 is characterized in that,
It is the taper shape on summit that the described described switching portion that closes cover forms with central authorities.
8. high-tension fuse according to claim 7 is characterized in that,
Be formed with a plurality of projections or prominent bar at the described upper surface that closes the described switching portion of cover.
9. according to any described high-tension fuse of claim 1～8, it is characterized in that,
The described cover that closes is provided with a plurality of described switching portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320090758 CN203165832U (en) | 2013-02-28 | 2013-02-28 | High voltage fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320090758 CN203165832U (en) | 2013-02-28 | 2013-02-28 | High voltage fuse |
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| Publication Number | Publication Date |
|---|---|
| CN203165832U true CN203165832U (en) | 2013-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320090758 Expired - Fee Related CN203165832U (en) | 2013-02-28 | 2013-02-28 | High voltage fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203165832U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106129925A (en) * | 2016-07-02 | 2016-11-16 | 卢国孝 | A kind of Novel multimedia line concentrating case |
-
2013
- 2013-02-28 CN CN 201320090758 patent/CN203165832U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106129925A (en) * | 2016-07-02 | 2016-11-16 | 卢国孝 | A kind of Novel multimedia line concentrating case |
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| 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: 20130828 Termination date: 20210228 |