CN1921238A - Hydraulic wire pressure welding clamp with overload protection function - Google Patents
Hydraulic wire pressure welding clamp with overload protection function Download PDFInfo
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- CN1921238A CN1921238A CN 200610096022 CN200610096022A CN1921238A CN 1921238 A CN1921238 A CN 1921238A CN 200610096022 CN200610096022 CN 200610096022 CN 200610096022 A CN200610096022 A CN 200610096022A CN 1921238 A CN1921238 A CN 1921238A
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Abstract
The invention relates to a hydraulic wire clamper with overload protection. Wherein, it comprises one clamper whose upper part has clamping open; the clamping open has upper and lower modules; the lower part has chamber with a piston to divide it into upper and lower oil chambers; the bottom of lower oil chamber has base and bottom cover; the lower side part of clamper is fixed with discharge and boost oil tube interfaces through to the upper and lower oil chambers; the upper module via upper module base is positioned at the clamping open; the lower module via its module base is mounted on the piston; the piston has one overload protective valve whose bottom is through to the lower oil chamber and upper part is through to the oil outlet of piston rod; the oil outlet is through to the space outside piston rod or the oil feeding chamber, to avoid explosion via over pressure. The invention can protect clamper and user.
Description
Technical field
The present invention relates to a kind of hydraulic conductor compression jointing tongs, be used in electric power transmission ﹠ distribution (change) electric line construction or the maintenance, crimping lead or steel strand wire are carried out crimping continues and the reinforcement crimping, belong to power line construction facility technical field with overload protection function.
Background technology
For hydraulic conductor compression jointing tongs, be no lack of in the literature and be seen in, A is for example arranged) hydraulic conductor compression jointing tongs that .CN2089210U recommended; B) hydraulic conductor compression jointing tongs of .CN2133065Y introduction; C) hydraulic conductor compression jointing tongs of .CN2295279Y disclosure; D) the disclosed portable hydraulic conductor compression jointing tongs of .CN23206596Y; E) hydraulic conductor compression jointing tongs of .CN2626093Y bulletin.
Document A) technical scheme of being recommended is to solve the spacing in pressing mechanism central bearing point and force and uses the volume that dwindles Press Plier, uses laborsaving.Document B) technical scheme of Jie Shaoing is that it is that the jaw of upper and lower jaw after involutory forms oval jaw that shape with the upper and lower associated jaw portion of Press Plier changes involutory each other rear center ovalize hole into.Document D) disclosed technical scheme mainly be little, in light weight around volume, labour intensity is low, the crimping time is short, actuating pressure was both high and stable or the like (the 1st page of 14-16 is capable for specification).
Document C) and document E) disclosed binding between hydraulic conductor compression jointing tongs and the hydraulic power unit and concrete operation principle in more detail.From document C) know (Instructions Page 2 reciprocal the 2nd section); hydraulic conductor compression jointing tongs to the crimping process of lead is: start hydraulic power unit; reversing valve operated; making hydraulic oil oil pocket after the oil pipe that boosts enters is in the lower oil cavitie of piston; the promotion piston rises; movable mold is cooperated with fixed die pushes therebetween and sleeve pipe that be placed on the lead; (size of pressure is by the Pressure gauge reflection that is located on the hydraulic power unit under certain pressure; overvoltage protection is realized by the safety valve that is located on the hydraulic power unit); after sleeve pipe is extruded distortion; sleeve pipe just with the pipe in lead link together securely; reversing valve operated then, making hydraulic oil oil pocket before relief conduit enters is in the upper oil cavitie of piston, and piston is moved down; push away thereby make under the movable mold, finished pressure joint thus some points.Document E) operation principle is with document C), but it can embody make Press Plier in entire work process, satisfy low-pressure, big flow advances the crimping at a slow speed of superhigh pressure low discharge, the big flow returning quickly of low-pressure fast.
By above-mentioned explanation, can know that fully hydraulic conductor compression jointing tongs is to match with the hydraulic power unit that carries unit head (abbreviation pumping plant) to use.Can illustrate that specifically unload, boost tubing interface 12a, the 12b of caliper 1 by communicating with the upper and lower oil pocket (not shown) of piston 11 respectively of setting firmly on it is respectively by means of sending oil pipe and the reversal valve 22 that has the pumping plant 2 of unit head 21 to be connected accordingly by Fig. 1.
Yet the disclosed all hydraulic conductor compression jointing tongs of above-mentioned document all lacks the overload protection function of self, only is the protection to pumping plant, controls by the Pressure gauge on the pumping plant, for example document C) shown in.Exposed problems is: Pressure gauge self is fragile, malfunctioning, causes trouble to replacing; By manually pressure being adjusted, specifically be by observing manometric pointer indicating value, but, therefore can't guarantee the accuracy of required pressure because the collimation error can't be eliminated; Overload protection to pumping plant is a kind of indirect protection to caliper, and its protection effect is very to be short of, because after pumping plant work a period of time, wearing and tearing can appear in the parts of each side, be difficult to avoid the leakage of hydraulic oil, therefore, the Pressure gauge indicating value is not equal to the actual working pressure value of pumping plant; The physical behavior of hydraulic oil self can change, for example in the pumping plant course of work, especially worked after a period of time, the heating of oil temperature, cause hydraulic oil by thick thinning, can not reach the required pressure of normal crimping requirement, otherwise, after a period of time of stopping using, enable once more, then cool off owing to oily temperature, the concentration of hydraulic oil rarely becomes thickly by original, and therefore, the actual working pressure of Press Plier shows as and is higher than gauge hand indicating value pressure, thereby cause the caliper explosion, undermine staff's personal safety.The caliper explosion of the hydraulic conductor compression jointing tongs of finding, what is heard is on ordinary days promptly caused by above-mentioned factors, so, in order to avoid the generation of caliper explosion casualty accident effectively, above-mentioned document C) adopted safety guard has been set, yet this only is safeguard procedures, but not the plan of effecting a permanent cure.
Summary of the invention
Task of the present invention is that a kind of hydraulic conductor compression jointing tongs with overload protection function that can stop to jeopardize because of the caliper explosion phenomenon generation of personal safety effectively will be provided.
Task of the present invention is finished like this; a kind of hydraulic conductor compression jointing tongs with overload protection function; it comprises a caliper; the top of caliper is formed with jaw; be respectively arranged with in the jaw; counterdie; the bottom of caliper is formed with cavity volume; be provided with piston in the cavity volume; on piston is divided into cavity volume; lower oil cavitie; the bottom of lower oil cavitie is provided with base and bottom successively, and the caliper following side is installed with respectively with last; what lower oil cavitie communicated unloads; the tubing interface that boosts, wherein; patrix is positioned the jaw place by upper bolster; and counterdie falls within on the piston by its mould column base, and described piston content is provided with an overload protection valve, and the valve pocket bottom of this overload protection valve communicates with lower oil cavitie; and valve pocket top communicates with draining hole on the piston boit that is opened in piston, and draining hole and upper oil cavitie extraneous with piston boit appointed and selected one and communicate.
Overload protection valve of the present invention comprises valve pocket; spring; valve; valve seat; spring bearer plate; adjust screw; valve gap; valve pocket is contained in the valve pocket chamber that is opened on the piston; the sidepiece of valve pocket offers the release oilhole that communicates with valve pocket; the release oilhole communicates with draining hole on the piston boit; spring; valve places in the valve pocket of valve pocket; valve seat is fixed on the bottom of valve pocket; offer first oilhole on it; first oilhole communicates with second oilhole that is opened in bottom, valve pocket chamber; second oilhole communicates with lower oil cavitie; valve is corresponding to first oilhole, and the lower end of spring is bearing on the valve, and the upper end is bearing on the spring bearer plate; spring bearer plate is fixed with the bottom of adjusting screw; the upper end of adjusting screw is stretched over outside the valve pocket, and with the turret head threaded engagement at valve pocket top, valve gap revolves in the valve cover cavity that fits over the valve pocket top of chamber.
Draining of the present invention hole is opened in the top of piston boit, and communicates with the external world.
Draining of the present invention hole is opened in the bottom of piston boit, and communicates with upper oil cavitie.
The bottom of valve seat of the present invention is fixed with sealing gasket.
Valve pocket of the present invention is provided with external screw teeth, and the nearly middle part in described valve pocket chamber and be provided with internal screw thread with the corresponding position of described external screw teeth, external screw teeth matches with internal screw thread.
Advantage of the present invention: lead is being carried out under the crimped status; if the pressure in the lower oil cavitie has surpassed the force value that caliper can bear (being generally about 80MPa); the overload protection valve is opened so; let out extraneous or leak into upper oil cavitie after making hydraulic oil in the lower oil cavitie through the overload protection valve again to piston boit by the draining hole on the piston boit; therefore; can both not help protecting caliper, play guaranteeing role again field operation personnel's personal safety because of hypertonia causes the caliper bursting accident.
Description of drawings
Figure 1 shows that the schematic diagram that caliper and the pumping plant of being furnished with unit head connect mutually.
Figure 2 shows that the present invention disposes the structure chart of the caliper of overload protection valve.
Figure 3 shows that overload protection valve of the present invention is contained in the assembling schematic diagram in the piston.
Figure 4 shows that the cutaway view of Fig. 3.
Figure 5 shows that the embodiment schematic diagram that the draining hole communicates with the piston boit external world.
Embodiment
By the description of applicant, will help to understand technical scheme essence of the present invention more, and advantage of the present invention and effect are further represented, but embodiment generally can not be used for limiting the present invention embodiment.
Referring to Fig. 2, provided caliper 1, the top of caliper 1 constitutes an opening, industry is called jaw, and upper and lower mould 13,14 is set in the jaw, and patrix 13 is as fixed die, connect by reference column (not shown) and upper bolster 131, and upper bolster 131 is positioned on the caliper 1 by alignment pin 1311, because the linking method that this binding and prior art are for example instructed among the CN2295279Y is identical, so the applicant exempts from and gives unnecessary details.Counterdie 14 uses with patrix 13 pairings, and it is to be located on the piston 11 by the die shoe hole 1113 (Fig. 3 shows) that mould post 141 insertions that are arranged on the counterdie 14 are opened on the piston boit 111.Known reason, upper and lower mould the 13, the 14th can be according to the difference of the wire gauge that is crimped and can change, and therefore, the version that goes out shown in the figure is not unique, so can not limit content of the present invention thus.
The bottom of caliper 1 has been processed into one and has formed close cavity behind assembling base 17, bottom 18, and this cavity volume is the cavity volume of piston 11.Piston 11 is by the inwall formation sealing of at least one sealing ring 113 with cavity volume, and the epicoele of piston 11 is a upper oil cavitie 15, and cavity of resorption is a lower oil cavitie 16.Treat in regular turn base 17, bottom 18 to be assemblied on the caliper 1 again after piston 11 is packed in the cavity volume of caliper 1 bottom, for preventing the leakage of the hydraulic oil in the lower oil cavitie 16, therefore can sealing ring 171 be set to base 17, the zone between base 17 and the piston 11 is lower oil cavitie 16.Upper and lower oil pocket 15,16 communicates with unload, boost tubing interface 12a, the 12b that receive on caliper 1 respectively.Specifically can be in conjunction with Fig. 1, when pumping plant 2 work, by oil pipe through the tubing interface 12b that boosts to lower oil cavitie 16 fuel feeding, so, piston 11 just rises, and by piston 11 counterdie 14 is closed up to patrix 13; Otherwise, when oil pipe through relief conduit interface 12a to upper oil cavitie 15 fuel feeding, piston 11 just moves down so, by piston 11 counterdie 14 and patrix 13 is repelled each other out.
In piston 11, be provided with one as the technology of the present invention main points and as a kind of overload protection valve 19 of version wherein, the bottom of these overload protection valve 19 valve pockets should communicate with lower oil cavitie 16, upper lateral part then can be by two kinds of selections, the one, offer respectively the draining hole 1111 identical at the base portion of piston boit 111 with upper oil cavitie 15, overload protection valve 19, make the hydraulic oil that comes from overload protection valve 19 leak into upper oil cavitie 15 through draining hole 1111; The 2nd, draining hole 1111 is opened in the portion on the upper side of piston boit 111, the hydraulic oil that comes from overload protection valve 19 is directly let out outside piston boit 111 through draining hole 1111, promptly directly let out the external world.Self-evident, the latter's mentality of designing is inferior to the former, because it understands dirty and caliper 1, and can cause the loss of hydraulic oil.Yet the latter's mentality of designing also has little vast strong point, for example, is let out toward extraneous hydraulic oil by draining hole 1111 in case see on the caliper 1, and the Pressure gauge on the surperficial pumping plant 2 has damaged or be malfunctioning, thereby can remind the user to change Pressure gauge.
Referring to Fig. 3 and Fig. 4; in order to hold or to claim to be installed to overload protection valve 19 of the present invention in the piston 11; therefore; on piston 11, must process a valve pocket chamber 112 that is used for scooping out overload protection valve 19; and valve cover cavity 1122 to the tool internal thread of upper design in valve pocket chamber 112; the middle part is processed with and is used for for the matched internal screw thread 1123 of the external screw teeth on the valve pocket 191 1914, and second oilhole 1121 that communicates with lower oil cavitie 16 is offered in the bottom.In the present embodiment, draining hole 1111 has been opened in the base portion of the piston boit 111 of piston 11, and this position is just corresponding to upper oil cavitie 15, and therefore the hydraulic oil that comes from the draining hole 1111 has no to leak into lavishly in the upper oil cavitie 15.
The upper end of valve pocket 191 promptly is processed with the part expansion of external screw teeth 1914 and establishes, so that be able to and cooperate by thread 1123, the bottom open end fixed valve base 194 of valve pocket 191, it is corresponding with second oilhole 1121 and communicate that the central authorities of valve seat 194 offer first oilhole, 1941, the first oilholes 1941.In order to make the valve seat 194 and the bottom in valve pocket chamber 112 realize good sealing effect, therefore be equipped with sealing gasket 1942 in the bottom of valve seat 194.Spring 192, valve 193 are placed in the valve pocket 1911 of valve pocket 191, valve 193 correspondences are at first oilhole, 1941 positions, when the pressure of the hydraulic oil in the lower oil cavitie 16 reaches when being enough to overcome the active force of 192 pairs of valves 193 of spring, spring 192 is shunk, valve 193 is opened moving, the hydraulic oil that surpasses predetermined pressure enters valve pocket 1911 through second oilhole 1121, during the release oilhole 1912 that communicates with valve pocket 1911 on being opened in valve pocket 191 is let out and entered upper oil cavitie 15 as the low pressure oil pocket toward draining hole 1111 again.Valve gap 197 is rotated with in valve cover cavity 1122, and valve pocket 191 is played the qualification effect.Adjusting screw 195 for elastic force (pressure) setting of spring 192 by turn realizes, when screw 195 is adjusted in conrotatory, the spring bearer plate that is fixed in its lower end is moved down, causing spring 192 shrinks, otherwise it is then lax, obtain therefrom fixed pressure (be generally 80MPa, but specifically be to decide) according to the actual pressure that bears of caliper 1 to opening valve 193.
Not being subjected to the given version of the foregoing description for the concrete structure of overload protection valve 19 limits; allly corresponding overload protection valve is set in piston 11 uses the effect that prevents that caliper 1 from damaging because of overload of playing; so all should be considered as the technical scheme scope that not unconventional the present invention limits; because; objectively the structure of overload protection valve 19 can have various variations; can not be one by one to the greatest extent to enumerate; but it is set in the piston 11 of caliper 1 of hydraulic conductor compression jointing tongs sheerly applicant's the act of starting.
Referring to Fig. 5, as another kind of execution mode to draining hole 1111, inwall in valve pocket chamber 112 processes one and had both communicated with draining hole 1111, the drain pan 1114 that communicates with valve cover cavity 1122 again, and process an oil outlet 1115 that communicates with valve cover cavity 1122 on the top of piston boit 111, so hydraulic oil is let out to the external world through release oilhole 1912, draining hole 1111, drain pan 1114, oil outlet 1115 successively, all the other are with the description to Fig. 3, Fig. 4.
In conjunction with Fig. 2 to Fig. 4 operation principle of the present invention that underdraws, during use, by unload, boost tubing interface 12a, the 12b and finish hydraulic circuit by pumping plant 2 illustrated in fig. 1 and connect of corresponding a pair of oil pipe with caliper 1 of the present invention.The opening pressure of the overload protection valve 19 on the caliper 1 is adjusted at rated value scope, for example 80MPa by adjusting screw 195.At operation field, earlier outside the lead that need engage, put sleeve pipe by operating personnel, also be about to pipe box and continue at need on the lead of (crimping), sleeve pipe is placed on the counterdie 14, and makes counterdie 13 be brought together into counterdie 14 by upper bolster 131.Work along with pumping plant 2, and by operation to the reversal valve on the pumping plant 2, hydraulic oil enters lower oil cavitie 16 from the tubing interface 12b that boosts, increase gradually along with the hydraulic-oil quantity in the lower oil cavitie 16, activation plug 11 moves on gradually, drive on the counterdie 14 and move, will be squeezed into hexagon (is example with mold shape shown in Figure 2) at the sleeve pipe between the upper and lower mould 13,14 to cooperate patrix 13, thereby sleeve pipe is crimped on securely with lead.If in the crimping process; when the pressure of the hydraulic oil in the lower oil cavitie 16 has surpassed caliper 1 resultant pressure limit of bearing for example greater than 80MPa; so; valve 193 shake off spring 192 to its active force and open; hydraulic oil just enters valve pocket 1911 through second oilhole 1121, first oilhole 1941 successively; and then let out to upper oil cavitie 15 through release oilhole 1912, draining hole 1111, use the protection of playing caliper 1, can there be the anxiety that jeopardizes personal safety because of caliper 1 explosion.Crimping finishes, and operates the reversal valve on the pumping plant 2 before this, makes hydraulic oil enter upper oil cavitie 15 from relief conduit interface 12a, and lower oil cavitie 16 oil returns, upper and lower mould 13,14 is scolded out each other, and the lead after finishing crimping is shifted out from jaw.Usually; on pumping plant 2, itself be furnished with Pressure gauge, but owing to depend merely on many shortcomings that Pressure gauge exists the front to mention, therefore after overload protection valve 19 of the present invention is set; the effect of duplicate protection can be played, the described drawback in the prior art can be eliminated especially fully.
Claims (6)
1; a kind of hydraulic conductor compression jointing tongs with overload protection function; it comprises a caliper (1); the top of caliper (1) is formed with jaw; be respectively arranged with in the jaw; counterdie (13); (14); the bottom of caliper (1) is formed with cavity volume; be provided with piston (11) in the cavity volume; on piston (11) is divided into cavity volume; lower oil cavitie (15); (16); the bottom of lower oil cavitie (16) is provided with base (17) and bottom (18) successively; caliper (1) following side is installed with respectively with last; lower oil cavitie (15); what (16) communicate unloads; tubing interface (12a) boosts; (12b); wherein; patrix (13) is positioned the jaw place by upper bolster (131); and counterdie (14) is located on the piston (11) by its mould post (141); it is characterized in that described piston (11) content is provided with an overload protection valve (19); the valve pocket bottom of this overload protection valve (19) communicates with lower oil cavitie (16); and valve pocket top communicates with draining hole (1111) on the piston boit that is opened in piston (11) (111), and both appoint draining hole (1111) and upper oil cavitie (15) extraneous with piston boit and select one and communicate.
2; hydraulic conductor compression jointing tongs with overload protection function according to claim 1; it is characterized in that described overload protection valve (19) comprises valve pocket (191); spring (192); valve (193); valve seat (194); spring bearer plate (196); adjust screw (195); valve gap (197); valve pocket (191) is contained in the valve pocket chamber (112) that is opened on the piston (11); the sidepiece of valve pocket (191) offers the release oilhole (1912) that communicates with valve pocket (1911); release oilhole (1912) communicates with draining hole (1111) on the piston boit (111); spring (192); valve (193) places in the valve pocket (1911) of valve pocket (191); valve seat (194) is fixed on the bottom of valve pocket (191); offer first oilhole (1941) on it; first oilhole (1941) communicates with second oilhole (1121) that is opened in bottom, valve pocket chamber (112); second oilhole (1121) communicates with lower oil cavitie (16); valve (193) is corresponding to first oilhole (1941); the lower end of spring (192) is bearing on the valve (193); the upper end is bearing on the spring bearer plate (196); spring bearer plate (196) is fixed with the bottom of adjusting screw (195); the upper end of adjusting screw (195) is stretched over outside the valve pocket (191); and with turret head (1913) threaded engagement at valve pocket (191) top, valve gap (197) revolves in the valve cover cavity (1122) that fits over top, valve pocket chamber (112).
3, the hydraulic conductor compression jointing tongs with overload protection function according to claim 1 and 2 is characterized in that described draining hole (1111) is opened in the top of piston boit (111), and communicates with the external world.
4, the hydraulic conductor compression jointing tongs with overload protection function according to claim 1 is characterized in that described draining hole (1111) is opened in the bottom of piston boit (111), and communicates with upper oil cavitie (15).
5, the hydraulic conductor compression jointing tongs with overload protection function according to claim 2 is characterized in that the bottom of described valve seat (194) is fixed with sealing gasket (1942).
6, the hydraulic conductor compression jointing tongs with overload protection function according to claim 2; it is characterized in that described valve pocket (191) is provided with external screw teeth (1914); and the nearly middle part in described valve pocket chamber (112) and be provided with internal screw thread (1123) with the corresponding position of described external screw teeth (1914), both match external screw teeth (1914) and internal screw thread (1123).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100960228A CN100421315C (en) | 2006-09-11 | 2006-09-11 | Hydraulic wire pressure welding clamp with overload protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100960228A CN100421315C (en) | 2006-09-11 | 2006-09-11 | Hydraulic wire pressure welding clamp with overload protection function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1921238A true CN1921238A (en) | 2007-02-28 |
| CN100421315C CN100421315C (en) | 2008-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100960228A Expired - Fee Related CN100421315C (en) | 2006-09-11 | 2006-09-11 | Hydraulic wire pressure welding clamp with overload protection function |
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| CN (1) | CN100421315C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532058A (en) * | 2013-09-30 | 2014-01-22 | 国家电网公司 | Aluminum tube crimping device |
| CN104485564A (en) * | 2014-12-15 | 2015-04-01 | 重庆市渝坝汽车配件有限公司 | Cable press-fitting equipment |
| CN112042065A (en) * | 2018-04-09 | 2020-12-04 | 豪倍公司 | Decagon compression mould |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3300917B2 (en) * | 1996-11-01 | 2002-07-08 | 株式会社泉精器製作所 | Hydraulic compressor with counter |
| CN2348969Y (en) * | 1998-11-14 | 1999-11-17 | 玉环县新洋液压机械厂 | Hand operated hydraulic pliers |
| CN2535632Y (en) * | 2002-02-26 | 2003-02-12 | 浙江临海海宏集团有限公司 | Double throttle straight-moving type over-flow valve |
| US6668613B2 (en) * | 2002-04-09 | 2003-12-30 | Fci Americas Technology, Inc. | Hydraulic compression tool and hydraulic compression tool motor |
| CN2675987Y (en) * | 2004-01-12 | 2005-02-02 | 刘聚磊 | Steel ball oil sealed hydraulic safety valve |
| CN200950519Y (en) * | 2006-09-11 | 2007-09-19 | 常熟市重量电力机具有限公司 | Hydraulic conductor crimping tong having overload protection function |
-
2006
- 2006-09-11 CN CNB2006100960228A patent/CN100421315C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532058A (en) * | 2013-09-30 | 2014-01-22 | 国家电网公司 | Aluminum tube crimping device |
| CN103532058B (en) * | 2013-09-30 | 2018-05-29 | 国家电网公司 | A kind of aluminum pipe compression bonding apparatus |
| CN104485564A (en) * | 2014-12-15 | 2015-04-01 | 重庆市渝坝汽车配件有限公司 | Cable press-fitting equipment |
| CN112042065A (en) * | 2018-04-09 | 2020-12-04 | 豪倍公司 | Decagon compression mould |
| US11677203B2 (en) | 2018-04-09 | 2023-06-13 | Hubbell Incorporated | Decagon compression die |
| CN112042065B (en) * | 2018-04-09 | 2024-03-29 | 豪倍公司 | Decagon compression mould |
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| Publication number | Publication date |
|---|---|
| CN100421315C (en) | 2008-09-24 |
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Granted publication date: 20080924 Termination date: 20130911 |