CN213227215U - Medium-pressure resin bus expansion joint pouring mold - Google Patents
Medium-pressure resin bus expansion joint pouring mold Download PDFInfo
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- CN213227215U CN213227215U CN202020017113.3U CN202020017113U CN213227215U CN 213227215 U CN213227215 U CN 213227215U CN 202020017113 U CN202020017113 U CN 202020017113U CN 213227215 U CN213227215 U CN 213227215U
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Abstract
The utility model discloses a medium-voltage resin bus expansion joint pouring mould, after the female row of resin bus expansion joint the latter half passes pouring die cavity bottom stripper plate slotted hole, by steel die sleeve top flexible coupling positioning mechanism, the extension length and the female row looks interval of the female row of female row spacing fixed of female row positioning mechanism below, the resin of watering again, after the resin pouring of the latter half is accomplished, the stripper plate moves the drawing of patterns downwards along two cold-proof screw rods under the promotion of two nuts, after the resin bus expansion joint is lifted by the drawing die crane and overturns, lower stripper plate resets, repeat the above-mentioned process, satisfy the expansion joint and pour the demand perpendicularly, guarantee the surface quality after all installation face drawing of patterns and the positioning size precision of inserts; can suspend fixed resin generating line expansion joint one side end in midair through ratchet steel wire lifting hook, overcome the unable bearing's in flexible coupling position problem when the opposite side is pour, simple structure, location convenient operation, the position precision is high, pours the steady quality, and factor of safety is high.
Description
Technical Field
The utility model relates to a mould is pour to middling pressure resin generating line expansion joint.
Background
An expansion joint bus needs to be configured in a bus system of a power transmission and distribution product in the power industry within a specified distance so as to adapt to position errors in engineering installation and relieve size changes caused by thermal expansion in system operation; the expansion joint of the medium-pressure resin bus is generally formed by two end pouring bodies and a middle part which are in flexible connection, the size is large and heavy, the two pouring bodies need to be respectively poured and formed, and the installation and connection are difficult after pouring and forming; and the flexible coupling part of resin generating line expansion joint can not the bearing, need keep the female arranging at resin generating line expansion joint both ends at vertical position again pouring the in-process, still need taut flexible coupling part to keep at vertical state simultaneously, prevents that high temperature from damaging the insulating layer of flexible coupling part, and the location operation is inconvenient, and the position precision is not high, pours the quality unstability, still has the potential safety hazard.
Disclosure of Invention
The utility model aims to solve the technical problem that a pour steady quality is provided, and the position precision is high, simple structure, convenient operation's well pressure resin generating line expansion joint pouring die.
The utility model discloses a mould is pour to medium-pressure resin generating line expansion joint, its characterized in that: the lower stripper plate is provided with a slotted hole for the lower end part of the phase line busbar at the lower half part of the resin busbar expansion joint to extend out; the outer part of the steel die sleeve is fixedly supported and connected to a portal frame through a fixed support frame, a flexible connection positioning mechanism capable of spacing and supporting the lower end part of the flexible connection part of the resin bus expansion joint according to the phase distance requirement is arranged at the top of the steel die sleeve, and a bus positioning mechanism capable of spacing and supporting the lower half part of the resin bus expansion joint according to the phase distance requirement and the bus extension length requirement is arranged below the pouring die; a suspension mechanism capable of suspending and fixing the upper half part of the resin bus expansion joint is arranged below the top of the portal frame, and a die-drawing crane capable of hoisting and demoulding the poured resin bus expansion joint is arranged above the top of the portal frame;
the steel die sleeve is of a T-shaped structure, the outer ends of a pair of symmetrically arranged fixed support frames are respectively and fixedly connected to the inner side surfaces of the portal frame upright columns on two sides, and the inner ends of the fixed support frames are matched with the T-shaped structure to limit and support the steel die sleeve;
the lower parts of the pair of fixed supporting frames are respectively and fixedly connected with a screw rod which vertically extends downwards, and two ends of the lower stripper plate are respectively connected to the screw rods in a limiting way through an upper nut and a lower nut;
the bus bar positioning mechanism comprises a bus bar positioning plate fixedly connected to the lower end of the screw rod and a bus bar positioning rod fixedly arranged above the bus bar positioning plate, and two ends of the bus bar positioning rod are fixedly supported above the bus bar positioning plate through fulcrums respectively;
the upper surface of the busbar positioning plate and the corresponding position of the end part of each phase line busbar of the resin busbar expansion joint are respectively provided with a limiting groove;
the suspension mechanism comprises a main pulley and a main steel wire rope which are arranged in the middle of a top frame of the portal frame, a copper bar hanging wheel is arranged on the upper part of the outer side surface of a stand column on one side of the portal frame, one end of the main steel wire rope is tensioned and pulled by the copper bar hanging wheel, the other end of the main steel wire rope bypasses the main pulley and is connected with a main hook, the main hook is hung in a hanging ring in the middle of the upper part of a transverse hanging plate, a plurality of vertical clamping plates are arranged below the transverse hanging plate, and each vertical clamping plate can be matched and fixedly connected;
each vertical clamping plate comprises a pair of L-shaped plates, the L-shaped plates are arranged oppositely and are fixedly connected to the transverse hanging plate through short edges respectively, and the distance between the long edges of the L-shaped plates is matched with the thickness of the resin bus expansion joint busbar;
the suspension mechanism further comprises a pair of auxiliary pulleys and an auxiliary steel wire rope, the pair of auxiliary pulleys are symmetrically arranged at positions, located on two sides of the main pulley, of the top frame of the portal frame, the lower parts of the outer side surfaces of the upright columns on two sides of the portal frame are respectively provided with a left pull wheel and a right pull wheel, one end of the auxiliary steel wire rope of the pair of auxiliary pulleys is respectively tensioned and pulled by the left pull wheel and the right pull wheel, and the other end of the auxiliary steel wire rope of the pair of auxiliary pulleys is respectively; after the resin block at the lower half part of the resin bus expansion joint is poured and lifted and turned by a die-drawing crane, the auxiliary hook can assist in suspending the resin block;
a transition pulley is arranged above the end part of the portal frame top frame corresponding to the copper bar hanging wheel, and a main steel wire rope is tensioned and drawn to be connected to the main pulley from the copper bar hanging wheel through the transition pulley; the main hook and the auxiliary hook are ratchet wheel steel wire hooks;
the flexible connection positioning mechanism comprises a plurality of pairs of clamping plates corresponding to flexible connection positions of each phase of resin bus expansion joint, one clamping plate of each pair of clamping plates is a fixed clamping plate, the other clamping plate is a movable clamping plate, one end of the movable clamping plate is hinged to the fixed clamping plate, and the other end of the movable clamping plate is a free end and can be locked by a lock catch on the fixed clamping plate.
In the pouring mold for the medium-pressure resin bus expansion joint of the utility model, after the bus bar at the lower half part of the resin bus expansion joint passes through the slotted hole of the lower stripper plate at the bottom of the pouring mold cavity, the flexible connection part is limited and fixed by a busbar positioning mechanism, the extension length of the busbar and the phase distance of the busbar are accurately positioned, and the flexible connection part is limited and fixed by a flexible connection positioning mechanism at the top of the steel die sleeve, meanwhile, the spacing position of the busbar in the pouring mold cavity is controlled, resin is poured, after the resin pouring of the lower half part of the resin busbar expansion joint is finished, the lower stripper plate is pushed by the double nuts to move downwards along the two warm-keeping screw rods for stripping, after the resin bus expansion joint is lifted and turned over by the die-drawing crane, the lower stripper plate is reset, the limiting and fixing of the busbar and the flexible connection are repeated, and the other half of resin is continuously poured, so that the pouring work of two resin blocks of the resin bus expansion joint is completed, the vertical pouring requirement of the expansion joint is met, and the surface quality of all mounting surfaces after being demoulded and the positioning size precision of the insert are ensured to the maximum extent; the end head at one side of the resin bus expansion joint can be suspended and fixed through the ratchet wheel steel wire lifting hook, the problem that the soft connection part cannot bear load when the other side is poured is solved, and the whole body is lifted and demoulded through a pattern drawing crane after pouring is finished; simple structure, location convenient operation, the position precision is high, pours the steady quality, and factor of safety is high.
Drawings
Fig. 1 is a schematic structural view of a lower half part of a resin bus expansion joint of a pouring mold for a resin bus expansion joint in the embodiment of the present invention;
FIG. 2 is an enlarged schematic view of a portion of the structure of FIG. 1;
fig. 3 is the embodiment of the utility model provides an in the embodiment of press resin generating line expansion joint casting die pour accomplish after the latter half of resin generating line expansion joint is pour and is overturn, continue to pour another half time structure schematic diagram.
Detailed Description
As shown in the figure, the overall plan scheme of the medium-pressure resin bus expansion joint casting mold is as follows:
firstly, selecting a portal frame as a basic supporting structure, fixedly arranging a pouring mold below the interior of the portal frame 3, wherein the pouring mold is firstly surrounded by a steel mold sleeve 11 and a lower stripper plate 12 to form a pouring mold cavity, and the lower stripper plate 12 is provided with a plurality of slotted holes, the number and the size of the slotted holes respectively correspond to the number and the size of a resin bus expansion joint busbar 14, so that the lower end part of the phase line busbar 14 on the lower half part of the resin bus expansion joint extends to the lower part along the slotted holes; the outer part of the steel die sleeve 11 is fixedly supported and connected to the inner part of the portal frame 3 through a fixed support frame, so that the support is stable, and the operations such as positioning, pouring and the like are facilitated; the top of the steel die sleeve 11 is provided with a flexible connection positioning mechanism 8 according to the requirement of the phase distance, the lower end part of the flexible connection part 7 of the resin bus expansion joint is limited and supported by the flexible connection positioning mechanism 8 according to the requirement of the phase distance, a bus positioning mechanism is arranged below the casting die, and the lower half part of the phase line bus 14 of the resin bus expansion joint is limited and supported by the bus positioning mechanism according to the requirement of the phase distance and the bus extension length, so that the displacement deviation is avoided in the casting process, and the casting quality is stable; a suspension mechanism is arranged below the top of the portal frame 3, and the suspension mechanism suspends and fixes the upper half part of the resin bus expansion joint, so that the problem that the soft connection part cannot bear load when the resin block on the other side is poured is solved, the soft connection part is kept in a vertical state, the insulating layer of the soft connection part is prevented from being deformed or even damaged due to the influence of pouring temperature, the product quality is ensured, and the efficiency is improved; and finally, installing a die-drawing crane above the top of the portal frame 3, and lifting the poured resin bus expansion joint by the die-drawing crane to perform demoulding.
Specifically, the method comprises the following steps:
the steel die sleeve 11 adopts a T-shaped structure to adapt to a T-shaped structure formed by the fact that the total width of a casting body at the joint of the flexible connecting part of the resin bus expansion joint and the phase line bus is larger than the total width requirement of the casting body of the phase line bus, and a corresponding internal cavity is arranged according to the appearance structure requirement of an insulator of each phase line bus; the T-shaped structure of the steel die sleeve 11 also has the function of a limiting step; the fixed support frames outside the steel die sleeve 11 are a pair of fixed support frames 9 which are symmetrically arranged, the outer ends of the pair of fixed support frames 9 are respectively and fixedly connected to the inner side surfaces of the upright columns on the two sides of the portal frame 3, the inner ends of the fixed support frames are matched with the T-shaped structure to limit and support the steel die sleeve 11, the supporting strength is high, and the structure is stable;
a screw 18 extending downwards along the vertical direction is respectively fixedly connected below the pair of fixed supporting frames 9, and two ends of the lower stripper plate 12 are respectively connected on the screw 18 in a limiting way through a double-nut structure formed by combining an upper nut 17 and a lower nut 16; after the resin of resin generating line expansion joint the latter half is pour and is accomplished, the drawing die plate removes the drawing of patterns downwards along two cold-proof screw rods under promoting through two nuts, and resin generating line expansion joint lifts by crane the upset back, and the drawing die plate resets under the rethread two nuts promotes, and second half resin continues to be pour to repeated spacing fixed female arranging, flexible coupling, accomplishes two resin blocks of resin generating line expansion joint and pours work.
A transverse busbar positioning plate 15 is fixedly connected to the lower end of the screw rod 18, a transverse busbar positioning rod 13 is fixedly arranged above the busbar positioning plate, and two ends of the busbar positioning rod 13 are fixedly supported above the busbar positioning plate 15 through pivots respectively; the busbar positioning rod 13 can be arranged at one side above the busbar positioning plate 15, each phase line busbar of the resin busbar expansion joint can be aligned in an external limiting mode, and the two ends of the resin busbar expansion joint can also be fixedly supported through supporting points after sequentially penetrating through connecting holes in each phase line busbar of the resin busbar expansion joint, so that the latter operation mode is complicated;
the upper surface of the busbar positioning plate 15 and the position corresponding to the end part of each phase line busbar 14 of the resin busbar expansion joint are respectively provided with a limiting groove, the lower end part of the phase line busbar 14 on the lower half part of the resin busbar expansion joint of each phase line busbar 14 extends to the lower part along the slotted hole and then extends into the limiting groove, the limiting groove and the busbar positioning rod are combined to form a busbar positioning mechanism, and meanwhile, each phase line busbar 14 is positioned and fixed in the vertical direction, the horizontal direction and the longitudinal direction;
the suspension mechanism comprises a main pulley 27 and a main steel wire rope 23 which are arranged in the middle of a top frame of the gantry hanger, a copper bar hanging wheel 5 is arranged on the upper part of the outer side surface of a side upright post of the gantry hanger 3, one end of the main steel wire rope 23 is tensioned and pulled by the copper bar hanging wheel 5, the other end of the main steel wire rope bypasses the main pulley 27 and is connected with a main hook, the main hook is hung in a hanging ring 22 in the middle above a transverse hanging plate 4, and the upper half part which is not poured or is poured and turned is fixed on a resin bus expansion joint through the main hook and the hanging ring 22 in a matching way; the specific connection structure of the resin bus expansion joint and the resin bus expansion joint is that a plurality of vertical clamping plates 21 are arranged below a transverse hanging plate 4, and each vertical clamping plate 21 is matched and fixedly connected with a connection hole at the end part of a phase line bus bar of the resin bus expansion joint respectively so as to suspend and fix the upper half part of the resin bus expansion joint, overcome the problem that a soft connection part cannot bear the weight when a resin block on the other side is poured, and simultaneously keep the soft connection part in a vertical state;
furthermore, each vertical clamping plate 21 comprises a pair of L-shaped plates, the pair of L-shaped plates are arranged oppositely and fixedly connected to the bottom surface of the transverse hanging plate 4 through short edges respectively, the distance between the long edges of the pair of L-shaped plates is matched with the thickness of the phase line busbar of the resin bus expansion joint, the end part of the phase line busbar of the resin bus expansion joint is clamped through the matching of the pair of L-shaped plates, and the L-shaped plates can be fixedly connected with the connecting holes at the end part of the phase line busbar through bolts, so;
furthermore, because the resin block 6 at the lower half part of the resin bus expansion joint has heavier weight after being poured, therefore, the suspension mechanism is also provided with a pair of auxiliary pulleys 26 and an auxiliary steel wire rope 24, the pair of auxiliary pulleys 26 are symmetrically arranged at the positions of the top frame of the portal frame 3 at the two sides of the main pulley 27, a left pulling wheel 19 and a right pulling wheel 10 are respectively arranged at the lower parts of the outer side surfaces of upright posts at two sides of a portal frame 3, one ends of auxiliary steel wire ropes 24 of a pair of auxiliary pulleys 26 are respectively tensioned and pulled by the left pulling wheel 19 and the right pulling wheel 10, the other ends of the auxiliary steel wire ropes respectively bypass the pair of auxiliary pulleys 24 and then are connected with an auxiliary hook 20, a resin block 6 at the lower half part of a resin bus expansion joint is poured and lifted and turned by a drawing crane, a fixed hanging ring structure is respectively arranged at two ends of the T-shaped structure of the resin block 6, and the auxiliary hook and the fixed hanging ring are matched to assist in hanging the resin block, so that the hanging reliability is improved;
a pair of splint of difference fixed mounting that flexible coupling positioning mechanism 8 corresponds to every looks flexible coupling's of resin generating line expansion joint position at steel die sleeve top, one of them splint of every pair of splint set up to solid fixed splint, another splint set up to movable clamp, the articulated connection of movable clamp one end is on solid fixed splint, the latter half phase line female row of resin generating line expansion joint passes pours the die cavity and spacing fixed back, hug closely every looks flexible coupling on every solid fixed splint to splint, the free end of rotatory movable splint, make movable splint and solid fixed splint cooperation press from both sides tight flexible coupling, hasp locking movable splint on the solid fixed splint again, and convenient operation.
In the pouring mold for the medium-pressure resin bus expansion joint of the utility model, after the bus bar at the lower half part of the resin bus expansion joint passes through the slotted hole of the lower stripper plate at the bottom of the pouring mold cavity, the flexible connection part is limited and fixed by a busbar positioning mechanism, the extension length of the busbar and the phase distance of the busbar are accurately positioned, and the flexible connection part is limited and fixed by a flexible connection positioning mechanism at the top of the steel die sleeve, meanwhile, the spacing position of the busbar in the pouring mold cavity is controlled, resin is poured, after the resin pouring of the lower half part of the resin busbar expansion joint is finished, the lower stripper plate is pushed by the double nuts to move downwards along the two warm-keeping screw rods for stripping, after the resin bus expansion joint is lifted and turned over by the die-drawing crane, the lower stripper plate is reset, the limiting and fixing of the busbar and the flexible connection are repeated, and the other half of resin is continuously poured, so that the pouring work of two resin blocks of the resin bus expansion joint is completed, the vertical pouring requirement of the expansion joint is met, and the surface quality of all mounting surfaces after being demoulded and the positioning size precision of the insert are ensured to the maximum extent; the end head at one side of the resin bus expansion joint can be suspended and fixed through the ratchet wheel steel wire lifting hook, the problem that the soft connection part cannot bear load when the other side is poured is solved, and the whole body is lifted and demoulded through a pattern drawing crane after pouring is finished; simple structure, location convenient operation, the position precision is high, pours the steady quality, and factor of safety is high.
The method is characterized in that:
1. utility model's medium-voltage resin bus expansion joint pouring die, overall structure satisfies the expansion joint and pours the demand perpendicularly, and furthest has guaranteed the surface quality after all installation face drawing of patterns and the positioning dimension precision of inserts.
2. The end head of one side can be fixed through the ratchet wheel steel wire lifting hook mechanism, and the problem that the soft connection part cannot be weighed when the other side is poured is solved.
3. The bottom of the die carrier is provided with a busbar positioning plate and a positioning rod, so that the extension length of the busbar and the distance between the busbars can be accurately positioned.
4. Three sets of flexible connection positioning plates are also designed above the pouring steel die so as to control the positions of the busbars at intervals in the die cavity.
5. Two 1-ton electric hoists are arranged at the top of the die carrier, so that the product can be conveniently and directly pulled out of the die cavity through the lifting hook and the lower stripper plate after the resin product is completely cured.
Claims (10)
1. The utility model provides a mould is pour to medium-pressure resin generating line expansion joint which characterized in that: the lower stripper plate is provided with a slotted hole for the lower end part of the phase line busbar at the lower half part of the resin busbar expansion joint to extend out; the outer part of the steel die sleeve is fixedly supported and connected to a portal frame through a fixed support frame, a flexible connection positioning mechanism capable of spacing and supporting the lower end part of the flexible connection part of the resin bus expansion joint according to the phase distance requirement is arranged at the top of the steel die sleeve, and a bus positioning mechanism capable of spacing and supporting the lower half part of the resin bus expansion joint according to the phase distance requirement and the bus extension length requirement is arranged below the pouring die; and a suspension mechanism capable of suspending and fixing the upper half part of the resin bus expansion joint is arranged below the top of the portal frame, and a die-drawing crane capable of hoisting and demoulding the poured resin bus expansion joint is arranged above the top of the portal frame.
2. The medium-pressure resin busbar expansion joint pouring mold according to claim 1, wherein: the steel die sleeve is of a T-shaped structure, the outer ends of a pair of symmetrically arranged fixed support frames are respectively and fixedly connected to the inner side surfaces of the portal frame stand columns on the two sides, and the inner ends of the fixed support frames are matched with the T-shaped structure to limit and support the steel die sleeve.
3. The medium-pressure resin busbar expansion joint pouring mold according to claim 2, wherein: the lower parts of the pair of fixed supporting frames are respectively fixedly connected with a screw rod which vertically extends downwards, and two ends of the lower stripper plate are respectively in limit connection with the screw rod through an upper nut and a lower nut.
4. The medium-pressure resin busbar expansion joint pouring mold according to claim 3, wherein: the female positioning mechanism that arranges includes that a fixed connection arranges the locating plate at female of screw rod lower extreme and the female locating lever that arranges in female locating plate top of arranging, arranges the locating lever both ends and arranges the locating lever top at female locating plate through fulcrum fixed support respectively.
5. The medium-pressure resin busbar expansion joint pouring mold according to claim 4, wherein: and the upper surface of the busbar positioning plate and the corresponding position of the end part of each phase line busbar of the resin busbar expansion joint are respectively provided with a limiting groove.
6. The casting mold for the medium-pressure resin bus expansion joint as claimed in any one of claims 1 to 5, wherein: the suspension mechanism comprises a main pulley and a main steel wire rope which are arranged in the middle of a top frame of the portal frame, a copper bar hanging wheel is arranged on the upper portion of the outer side surface of a stand column on one side of the portal frame, one end of the main steel wire rope is tensioned and pulled by the copper bar hanging wheel, the other end of the main steel wire rope bypasses the main pulley and is connected with a main hook, the main hook is hung in a hanging ring in the middle of the upper portion of a transverse hanging plate, a plurality of vertical clamping plates are arranged below the transverse hanging plate, and each vertical clamping plate can be matched and fixedly connected.
7. The medium-pressure resin busbar expansion joint pouring mold according to claim 6, wherein: each vertical clamping plate comprises a pair of L-shaped plates, the L-shaped plates are arranged in a mutually opposite mode and are respectively fixedly connected to the transverse hanging plate through short edges, and the distance between the long edges of the L-shaped plates is matched with the thickness of the resin bus expansion joint busbar.
8. The medium-pressure resin busbar expansion joint pouring mold according to claim 7, wherein: the suspension mechanism further comprises a pair of auxiliary pulleys and an auxiliary steel wire rope, the pair of auxiliary pulleys are symmetrically arranged at positions, located on two sides of the main pulley, of the top frame of the portal frame, the lower parts of the outer side surfaces of the upright columns on two sides of the portal frame are respectively provided with a left pull wheel and a right pull wheel, one end of the auxiliary steel wire rope of the pair of auxiliary pulleys is respectively tensioned and pulled by the left pull wheel and the right pull wheel, and the other end of the auxiliary steel wire rope of the pair of auxiliary pulleys is respectively; after the resin blocks at the lower half part of the resin bus expansion joint are poured and lifted and turned by a die-drawing crane, the auxiliary hooks can assist in suspending the resin blocks.
9. The medium-pressure resin busbar expansion joint pouring mold according to claim 8, wherein: a transition pulley is arranged above the end part of the portal frame top frame corresponding to the copper bar hanging wheel, and a main steel wire rope is tensioned and drawn to be connected to the main pulley from the copper bar hanging wheel through the transition pulley; the main hook and the auxiliary hook are ratchet wheel steel wire hooks.
10. The medium-pressure resin busbar expansion joint pouring mold according to claim 9, wherein: the flexible connection positioning mechanism comprises a plurality of pairs of clamping plates corresponding to flexible connection positions of each phase of resin bus expansion joint, one clamping plate of each pair of clamping plates is a fixed clamping plate, the other clamping plate is a movable clamping plate, one end of the movable clamping plate is hinged to the fixed clamping plate, and the other end of the movable clamping plate is a free end and can be locked by a lock catch on the fixed clamping plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020017113.3U CN213227215U (en) | 2020-01-06 | 2020-01-06 | Medium-pressure resin bus expansion joint pouring mold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020017113.3U CN213227215U (en) | 2020-01-06 | 2020-01-06 | Medium-pressure resin bus expansion joint pouring mold |
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| CN213227215U true CN213227215U (en) | 2021-05-18 |
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| CN202020017113.3U Active CN213227215U (en) | 2020-01-06 | 2020-01-06 | Medium-pressure resin bus expansion joint pouring mold |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111070523A (en) * | 2020-01-06 | 2020-04-28 | 威腾电气集团股份有限公司 | Medium-pressure resin bus expansion joint pouring mold |
| CN114434609A (en) * | 2021-12-23 | 2022-05-06 | 重庆中航建设（集团）有限公司 | Movable rail shaping steel die without support |
-
2020
- 2020-01-06 CN CN202020017113.3U patent/CN213227215U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111070523A (en) * | 2020-01-06 | 2020-04-28 | 威腾电气集团股份有限公司 | Medium-pressure resin bus expansion joint pouring mold |
| CN114434609A (en) * | 2021-12-23 | 2022-05-06 | 重庆中航建设（集团）有限公司 | Movable rail shaping steel die without support |
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