CN208363048U - A kind of microstome one piece casting type plane fixed wheel bulkhead gate - Google Patents
A kind of microstome one piece casting type plane fixed wheel bulkhead gate Download PDFInfo
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- CN208363048U CN208363048U CN201820891628.9U CN201820891628U CN208363048U CN 208363048 U CN208363048 U CN 208363048U CN 201820891628 U CN201820891628 U CN 201820891628U CN 208363048 U CN208363048 U CN 208363048U
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Abstract
The utility model discloses a kind of microstome one piece casting type plane fixed wheel bulkhead gates, including casting door body；The downstream face for casting door body is equipped with top side water seal mounting groove, and the cross sectional shape of top side water seal mounting groove is rectangle, is equipped with top side water-sealed component in top side water seal mounting groove；Top side water-sealed component includes base steel sliding block and rubber pad；Base steel sliding block and rubber pad are fixed in top side water seal mounting groove through one group of sunk screw；The bottom surface for casting door body is equipped with bottom seal mounting groove, is equipped with bottom water sealing assembly in bottom seal mounting groove；Bottom seal in bottom seal mounting groove is fixed in bottom seal mounting groove through bottom seal pressing plate and one group of sunk screw；Bottom seal is closely connect with the rubber pad both ends in the water-sealed component of top side.The water seal of the utility model top side is connect using base steel sliding block and by rubber pad with casting door body, and rubber pad and bottom seal both ends are in close contact, and can effectively ensure that the water-stagnating effect of bulkhead gate under extra-high head.
Description
Technical field
The utility model relates to a kind of microstome one piece casting type plane fixed wheel bulkhead gates, belong to hydraulic and hydroelectric engineering gold
Belong to technical field of structures.
Background technique
For the bulkhead gate of water power or hydraulic engineering, consider that maintenance needs, usually in the front setting together maintenance lock
Door, this microstome plane bulkhead gate higher for head, though gate outer dimension is smaller, water pressure is big, steel plate thickness
Can be thicker, using traditional welding gate structure, weld narrow space, worker operation is difficult, welding quality it is difficult to ensure that, manufacture
Difficulty is larger, and conventional water seal abrasion loss is big, is easily damaged, and opening and closing capacity is also larger, so there is also deficiencies for the prior art, has
To in further perfect.
Utility model content
The purpose of this utility model is to provide a kind of microstome one piece casting type plane fixed wheel bulkhead gates, using high
The whole base steel sliding block of strong composite material is as top side water seal, because the small abrasion loss of base steel sliding block deformation is small, antifatigue execution
Well；And keep bottom seal and the rubber pad of base steel sliding block lower part cementing integral, to ensure gate sealing effect, to overcome existing
There is the deficiency of technology.
To achieve the above objectives, the present invention adopts the following technical solutions:
A kind of microstome one piece casting type plane fixed wheel bulkhead gate of the utility model, including casting door body；Cast door
The downstream face of body is panel of the planar structure as casting door body；Panel downstream face is equipped with top side water seal mounting groove；Top side water seal
The global shape of mounting groove is door type, and the cross sectional shape of top side water seal mounting groove is rectangle, installation in top side water seal mounting groove
There is top side water-sealed component；Top side water-sealed component includes base steel sliding block and rubber pad；Base steel sliding block and rubber pad are through one group of countersunk head spiral shell
Nail is fixed in top side water seal mounting groove；The bottom surface for casting door body is equipped with bottom seal mounting groove, the whole shape of bottom seal mounting groove
Shape is "-" type, and the cross sectional shape of bottom seal mounting groove is rectangle；Bottom water sealing assembly is installed in bottom seal mounting groove；Bottom seal
Component includes bottom seal and bottom seal pressing plate；Bottom seal is fixed on bottom seal mounting groove through one group of sunk screw by bottom seal pressing plate
It is interior；Bottom seal is closely connect with rubber pad both ends.
In aforementioned microstome one piece casting type plane fixed wheel bulkhead gate, the panel upstream face of the casting door body is equipped with one
The longitudinal and cross beam that group intersects in length and breadth forms one group of type chamber being arranged in rows and columns；The below the crossbeam of bottommost is equipped with and is parallel to panel
And the triangle through-hole of horizontal perforation casting door body；Type chamber positioned at casting door body top is the open type chamber of upstream face opening,
Type chamber positioned at casting door body lower part is the closed closed type chamber of upstream face；Through longitudinal deflector hole and cross between type chamber and type chamber
It is penetrated through to deflector hole, longitudinal deflector hole runs through the crossbeam of top；Triangle through-hole is penetrated through through longitudinal deflector hole and closed type chamber；
Two fixed wheel mounting holes up and down, the cross between two fixed wheel mounting holes are respectively equipped on the stringer on casting door body both sides
To deflector hole through the stringer on casting door body both sides；Side slide block is equipped on the outside of the stringer on casting door body both sides；Positioned at casting
It makes and is equipped with lifting hole(eyelet) at the top of the stringer among door body；
In aforementioned microstome one piece casting type plane fixed wheel bulkhead gate, the shape of the casting door body side is similar to hang down
Straight right-angled trapezium, wherein the bevel edge of right-angled trapezium is circular arc；
In aforementioned microstome one piece casting type plane fixed wheel bulkhead gate, fixed wheel group is installed in the fixed wheel mounting hole
Part；Fixed wheel component includes fixed wheel；Fixed wheel is fixedly connected through eccentric shaft with the interior support holes of fixed wheel two sides of mounting hole and external support hole；
Eccentric shaft one end is equipped with locating clamp plate, is equipped on the outside of locating clamp plate and screws head；The axis body of eccentric shaft is divided into three sections, axis body both sides section
Coaxially, axis body interlude and both sides section are not coaxially eccentric segment；Eccentric segment is connect with fixed wheel, one section close to locating clamp plate of axis body
It is connect with external support hole, another section of axis body connect with interior support holes；Sleeve is equipped between fixed wheel and the eccentric segment middle section of eccentric shaft,
Sleeve both ends are equipped with stop collar.
By adopting the above-described technical solution, the utility model is compared with prior art, the utility model has and has as follows
Beneficial effect:
1, small using microstome plane bulkhead gate outer dimension, the little feature of transport difficulty, bulkhead gate uses one
The integral structure of secondary casting and forming；Two fixed wheel installations are symmetrical arranged in the top and the bottom of the stringer on casting door body both sides occupy
Hole, the interior setting fixed wheel of fixed wheel mounting hole also serve as main reversed bearing.Side slide block uses monosymmetric circular arc convex body, lifting hole(eyelet), face
Plate, crossbeam, opened round deflector hole at each area's lattice between stringer are interconnected between each deflector hole, cast liquid good fluidity, just
In casting, without welding, manufacture difficulty is reduced, and plane bulkhead gate quality is guaranteed, scene without carry out gate with
Installation between side wheel simplifies installation procedure, improves installation effectiveness；
2, gate root edge uses arc transition curved body structure, and HYDRODYNAMIC CONDITION RELATING TO is good, when preferably reducing gate operation
Vibration, ensured gate operation safety；
3, in the panel upstream side top side water seal mounting groove that symmetrically enabling type is arranged, it is arranged in top side water seal mounting groove and slides
Dynamic face is the whole base steel sliding block of high-strength composite material as top side water seal, and rubber pad, upstream side door is arranged in base steel slider bottom
Gate rail head corresponding with base steel slide position is arranged in slot, and base steel sliding block and gate rail head contact sealing under effect of water pressure,
Because base steel sliding block deforms, small abrasion loss is small, and antifatigue execution is good；
4, setting upwarps pressing plate on the inside of outer plate, laterally sufficiently limits to top side water seal, effectively prevent the side of top side water seal
It is excessive and fail to deforming；
5, in panel upstream, side bottom is provided with bottom seal mounting groove, and bottom seal, bottom seal are equipped in bottom seal mounting groove
The rubber pad of both ends and base steel slider bottom is in close contact, and is fastened using bottom seal pressing plate by sunk screw, bottom seal and
The rubber pad of base steel sliding block lower part is cementing integral, and gate sealing effect is effectively ensured；
6, arc transition curved body inside configuration is arranged the closed type chamber of approximate trapezoidal-structure and through casting door body
Triangle through-hole is in order to casting；
7, the fixed wheel of microstome plane fixed wheel bulkhead gate also serves as main reversed bearing, uses fixed wheel with traditional main bearing,
Reversed bearing is simple using the anti-wheel of hinge formula elasticity or sliding block comparative structure, convenient for manufacture, and only carries out fixed wheel device and once assembles,
Without the assembly reversely supported, simplifies installation procedure, improve installation effectiveness；
8, casting door body outer dimension is 1~5mm more bigger than actual size, has finishing requirements position mechanical convenient for door body
Required precision is realized in processing.
Detailed description of the invention
Fig. 1 is casting door body downstream face schematic diagram；
Fig. 2 is casting door body upstream face schematic diagram；
Fig. 3 is the D-D cross-sectional view of Fig. 2；
Fig. 4 is the A direction view of Fig. 1；
Fig. 5 is the B-B cross-sectional view of Fig. 1；
Fig. 6 is the C-C cross-sectional view of Fig. 1；
Fig. 7 is the connection schematic diagram of fixed wheel component Yu fixed wheel mounting hole；
Fig. 8 is the connection schematic diagram of bulkhead gate and gate slot；
Fig. 9 is the 3-D view for casting door body.
Description of symbols: 10- cast door body, 11- panel, the top side 12- water seal mounting groove, 15- bottom seal mounting groove,
16- stringer, 17- crossbeam, 18- triangle through-hole, the open type chamber of 19-, the closed type chamber of 20-, the longitudinal direction 21- deflector hole, 22- are lateral
Deflector hole, 23- fixed wheel mounting hole, 24- side slide block, support holes, 26- external support hole, 27- lifting hole(eyelet), 28- circular arc, 30- in 25-
Top side water-sealed component, 31- base steel sliding block, 32- rubber pad, 33- sunk screw, 40- bottom water sealing assembly, 41- bottom seal, the bottom 42-
Water seal pressing plate, 50- fixed wheel component, 51- fixed wheel, 52- eccentric shaft, 53- locating clamp plate, 54- screw head, 55- sleeve, 56- limit
Ring, 60- gate slot, 61- gate rail head.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.
A kind of microstome one piece casting type plane fixed wheel bulkhead gate of the utility model, as shown in Figure 1, including casting door
Body 10；The downstream face for casting door body 10 is panel 11 of the planar structure as casting door body 10；11 downstream face of panel is equipped with top side
Water seal mounting groove 12；The global shape of top side water seal mounting groove 12 is door type, is equipped with top side in top side water seal mounting groove 12
Water-sealed component 30；As shown in figure 5, the cross sectional shape of top side water seal mounting groove 12 is rectangle, top side water-sealed component 30 includes base steel
Sliding block 31 and rubber pad 32；Base steel sliding block 31 and rubber pad 32 are fixed on top side water seal mounting groove 12 through one group of sunk screw 33
It is interior；As shown in Figure 1, the bottom surface of casting door body 10 is equipped with bottom seal mounting groove 15, the global shape of bottom seal mounting groove 15 is one
Font is equipped with bottom water sealing assembly 40 in bottom seal mounting groove 15；As shown in fig. 6, the cross sectional shape of bottom seal mounting groove 15 is
Rectangle；Bottom water sealing assembly 40 includes bottom seal 41 and bottom seal pressing plate 42；Bottom seal pressing plate 42 is through one group of sunk screw 33 bottom of by
Water seal 41 is fixed in bottom seal mounting groove 15；Bottom seal 41 closely connects with 32 both ends of rubber pad in top side water-sealed component 30
It connects.
As shown in Fig. 2, 11 upstream face of panel of casting door body 10 is equipped with one group of stringer 16 intersected in length and breadth and 17 shape of crossbeam
The type chamber being arranged in rows and columns at one group；The below the crossbeam of bottommost, which is equipped with, is parallel to panel 11 and horizontal perforation casting door body 10
Triangle through-hole 18；Type chamber positioned at casting 10 top of door body is shown in heavy line in open type chamber 19(Fig. 2 of upstream face opening
Rectangle frame), the type chamber positioned at casting 10 lower part of door body is rectangle shown in dotted line in the closed closed type chamber 20(Fig. 2 of upstream face
Frame)；It is penetrated through between type chamber and type chamber through longitudinal deflector hole 21 and lateral deflector hole 22, longitudinal deflector hole 21 runs through the cross of top
Beam；Triangle through-hole 18 is penetrated through through longitudinal deflector hole 21 with closed type chamber 20；Positioned at casting 10 both sides of door body stringer (also referred to as
Side bar) on be respectively equipped with two fixed wheel mounting holes 23 up and down, the lateral deflector hole 22 between two fixed wheel mounting holes 23 passes through
Wear the stringer on casting 10 both sides of door body；Side slide block 24 is equipped on the outside of the stringer on casting 10 both sides of door body；Positioned at casting door
Lifting hole(eyelet) 27 is equipped at the top of stringer 16 among body 10；
As shown in figure 3, the shape of casting 10 side of door body is similar to vertical right-angled trapezium, the wherein bevel edge of right-angled trapezium
For 28 fillet surface of circular arc, the right-angle side and top margin rounding of right-angled trapezium.
As shown in fig. 7, being equipped with fixed wheel component 50 in fixed wheel mounting hole 23；Fixed wheel component 50 includes fixed wheel 51；Fixed wheel 51
See through eccentric shaft 52 and support holes 25 in the interior support holes 25 and external support hole 26(of 23 two sides of fixed wheel mounting hole and external support hole 26
Fig. 9) it is fixedly connected；52 one end of eccentric shaft is equipped with locating clamp plate 53, is equipped on the outside of locating clamp plate 53 and screws first 54；Eccentric shaft 52
Axis body is divided into three sections, and axis body both sides section is coaxial, and axis body interlude and both sides section are not coaxially eccentric segment；Eccentric segment and fixed wheel 51 connect
It connects, axis body is connect close to one section of locating clamp plate 53 with external support hole 26, and another section of axis body connect with interior support holes 25；Fixed wheel 51
Sleeve 55 is equipped between the eccentric segment middle section of eccentric shaft 52,55 both ends of sleeve are equipped with stop collar 56.
As shown in figure 8, casting door body 10 is mounted in gate slot 60, gate slot 60 is equipped with and 31 location and shape of base steel sliding block
Corresponding gate rail head 61.
Embodiment
The microstome one piece casting type plane fixed wheel bulkhead gate of this example is as shown in Figures 1 to 3, molding using one-step casting
Cast door body.Top side water seal mounting groove 12, bottom seal mounting groove 15, stringer 16, crossbeam 17, triangle are cast in casting door body 10
It is through-hole 18, open type chamber 19, closed type chamber 20, longitudinal deflector hole 21, lateral deflector hole 22, fixed wheel mounting hole 23, lateral
The structures such as sliding block 24, lifting hole(eyelet) 27.
As shown in Fig. 2, the stringer 16 for being located at casting 10 both sides of door body is used as side bar, the top and the bottom middle position of side bar is symmetrical
If there are two fixed wheel mounting holes 23；23 inside rounding of fixed wheel mounting hole；As shown in fig. 7, being equipped with fixed wheel group in fixed wheel mounting hole 23
Part 50；Fixed wheel component 50 includes fixed wheel 51, and the width that 51 diameter of fixed wheel is slightly less than gate slot 60 also serves as main reversed bearing；Such as Fig. 1 institute
Show, 11 downstream side of panel is symmetrically arranged with the top side water seal mounting groove 12 of gate arrangement；The global shape of top side water seal mounting groove 12
Cross sectional shape for door type, top side water seal mounting groove 12 is illustrated in figure 6 rectangle.Top is installed in top side water seal mounting groove 12
Side sealing component 30；Top side water-sealed component 30 is as shown in figure 5, include base steel sliding block 31 and rubber pad 32；Base steel sliding block 31 and rubber
Rubber mat 32 is fixed in top side water seal mounting groove 12 by sunk screw 33.As shown in Fig. 2, the stringer 16 on casting 10 both sides of door body
Lateral deflector hole 22 is equipped on stringer 16 between top and two fixed wheel mounting holes 23；As shown in fig. 7, fixed wheel 51 passes through bolt
And eccentric shaft 52 is fixed in fixed wheel mounting hole 23；23 two sides of fixed wheel mounting hole are equipped with the external support hole for supporting eccentric shaft 52
26 and interior support holes 25；It is equipped on the outside of external support hole 26 corresponding with the bolt location of 53 annular configuration of locating clamp plate on eccentric shaft 52
Threaded hole (threaded hole be drilling)；As shown in Fig. 2, stringer 16 is equipped with lateral deflector hole 22；Cast 10 both sides of door body
Stringer 16 and remaining stringer 16 between crossbeam 17 be equipped with longitudinal deflector hole 21；As shown in figure 8, side slide block 24 is two sides
Symmetrical circular arc convex body, the gap between side slide block 24 and corresponding 60 track of gate slot are 10~20mm；Cast door body 10
Root edge uses 28 fillet surface body structure of circular arc；28 fillet surface body structure downstream end of circular arc is equipped with bottom seal mounting groove 15, bottom
The shape of water seal mounting groove 15 is illustrated in figure 4 square type notch；Bottom seal 41 is equipped in square type notch, bottom seal 41 passes through one group
Sunk screw 33 and bottom seal pressing plate 42 are fixed in bottom seal mounting groove 15.Bottom seal pressing plate 42 is U-shaped structure.Bottom seal 41
Bottom surface is arc surface outstanding；41 both ends of bottom seal and 31 bottom of top side water seal are in close contact.As shown in figure 8, being set on gate slot 60
There is gate rail head 61 corresponding with 31 location and shape of base steel sliding block；As shown in Figure 3 and Figure 9,28 fillet surface body structure of circular arc
Inside is equipped with the closed type chamber 20 of approximate trapezoidal-structure and the triangle through-hole 18 through casting door body 10.
As shown in fig. 7, being equipped with fixed wheel component 50 in fixed wheel mounting hole 23；Fixed wheel component 50 includes fixed wheel 51；Fixed wheel 51
It is fixedly connected through eccentric shaft 52 with the interior support holes 25 of 23 two sides of fixed wheel mounting hole and external support hole 26；52 one end of eccentric shaft is equipped with
Locating clamp plate 53 is equipped on the outside of locating clamp plate 53 and screws first 54；The axis body of eccentric shaft 52 is divided into three sections, and axis body both sides section is coaxial,
Axis body interlude and both sides section are not coaxially eccentric segment；Eccentric segment is connect with fixed wheel 51, one section close to locating clamp plate 53 of axis body
It is connect with external support hole 26, another section of axis body connect with interior support holes 25；Between fixed wheel 51 and the eccentric segment middle section of eccentric shaft 52
Equipped with sleeve 55,55 both ends of sleeve are equipped with stop collar 56.
The bulkhead gate of this example has outer dimension small, the little feature of transport difficulty.It is equipped with and leads on crossbeam and stringer
Discharge orifice casts liquid good fluidity, convenient for casting.The gate of this example is reduced without welding, manufacture difficulty, and gate quality is protected
Card.Without carrying out the installation between gate and side wheel when in-site installation, installation procedure is simplified, installation effectiveness is improved；Gate bottom
Edge uses arc transition curved body structure, and HYDRODYNAMIC CONDITION RELATING TO is good, preferably reduces vibration when gate operation, has ensured gate
The safety of operation；Top side water seal uses base steel sliding block 31, and is connect by rubber pad with casting door body, rubber pad and bottom seal two
End is in close contact, and can effectively ensure that the water-stagnating effect of bulkhead gate under extra-high head.
Claims (4)
1. a kind of microstome one piece casting type plane fixed wheel bulkhead gate, including casting door body (10)；It is characterized by: casting door
The downstream face of body (10) is panel (11) of the planar structure as casting door body (10)；Panel (11) downstream face is equipped with top side water seal
Mounting groove (12)；The global shape of top side water seal mounting groove (12) is door type, is equipped with top in top side water seal mounting groove (12)
Side sealing component (30), the cross sectional shape of top side water seal mounting groove (12) are rectangle；Top side water-sealed component (30) includes that base steel is sliding
Block (31) and rubber pad (32)；Base steel sliding block (31) and rubber pad (32), which are fixed on top side water seal through one group of sunk screw (33), pacifies
In tankage (12)；The bottom surface for casting door body (10) is equipped with bottom seal mounting groove (15), is equipped with bottom in bottom seal mounting groove (15)
Water-sealed component (40)；The global shape of bottom seal mounting groove (15) is "-" type, and the cross sectional shape of bottom seal mounting groove (15) is
Rectangle；Bottom water sealing assembly (40) includes bottom seal (41) and bottom seal pressing plate (42)；Bottom seal pressing plate (42) is through one group of countersunk head spiral shell
Bottom seal (41) is fixed in bottom seal mounting groove (15) by nail (33)；Rubber in bottom seal (41) and top side water-sealed component (30)
Rubber mat (32) both ends closely connect.
2. microstome one piece casting type plane fixed wheel bulkhead gate according to claim 1, it is characterised in that: the casting door
Panel (11) upstream face of body (10) is equipped with one group of stringer (16) intersected in length and breadth and crossbeam (17) forms one group and is arranged in rows and columns
Type chamber；The below the crossbeam of bottommost is equipped with the triangle through-hole for being parallel to panel (11) and horizontal perforation casting door body (10)
(18)；Type chamber positioned at casting door body (10) top is the open type chamber (19) of upstream face opening, is located at casting door body (10)
The type chamber of lower part is the closed closed type chamber (20) of upstream face；It is led between type chamber and type chamber through longitudinal deflector hole (21) and laterally
Discharge orifice (22) perforation, longitudinal deflector hole (21) run through the crossbeam of top；Triangle through-hole (18) is through longitudinal deflector hole (21) and envelope
Enclosed type chamber (20) perforation；Two fixed wheel mounting holes (23) up and down are respectively equipped on the stringer on casting door body (10) both sides,
Lateral deflector hole (22) between two fixed wheel mounting holes (23) is through the stringer for casting door body (10) both sides；Positioned at casting
Side slide block (24) are equipped on the outside of the stringer on door body (10) both sides；It is equipped at the top of the stringer (16) intermediate positioned at casting door body (10)
Lifting hole(eyelet) (27).
3. microstome one piece casting type plane fixed wheel bulkhead gate according to claim 1, it is characterised in that: the casting door
The shape of body (10) side is similar to vertical right-angled trapezium, and wherein the bevel edge of right-angled trapezium is circular arc (28) fillet surface, directly
The trapezoidal right-angle side in angle and top margin rounding.
4. microstome one piece casting type plane fixed wheel bulkhead gate according to claim 2, it is characterised in that: the fixed wheel peace
Fixed wheel component (50) are installed in dress hole (23)；Fixed wheel component (50) includes fixed wheel (51)；Fixed wheel (51) through eccentric shaft (52) with
The interior support holes (25) of fixed wheel mounting hole (23) two sides are fixedly connected with external support hole (26)；Eccentric shaft (52) one end is equipped with positioning
Snap-gauge (53), locating clamp plate (53) outside, which is equipped with, screws head (54)；The axis body of eccentric shaft (52) is divided into three sections, and axis body both sides section is same
Axis, axis body interlude and both sides section are not coaxially eccentric segment；Eccentric segment is connect with fixed wheel (51), and axis body is close to locating clamp plate (53)
One section connect with external support hole (26), another section of axis body connect with interior support holes (25)；Fixed wheel (51) and eccentric shaft (52)
Sleeve (55) are equipped between eccentric segment middle section, sleeve (55) both ends are equipped with stop collar (56).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820891628.9U CN208363048U (en) | 2018-06-08 | 2018-06-08 | A kind of microstome one piece casting type plane fixed wheel bulkhead gate |
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| CN201820891628.9U CN208363048U (en) | 2018-06-08 | 2018-06-08 | A kind of microstome one piece casting type plane fixed wheel bulkhead gate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109137845A (en) * | 2018-06-08 | 2019-01-04 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of microstome one piece casting type plane fixed wheel bulkhead gate |
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2018
- 2018-06-08 CN CN201820891628.9U patent/CN208363048U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109137845A (en) * | 2018-06-08 | 2019-01-04 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of microstome one piece casting type plane fixed wheel bulkhead gate |
| CN109137845B (en) * | 2018-06-08 | 2024-04-23 | 中国电建集团贵阳勘测设计研究院有限公司 | Small-hole integral casting type plane fixed wheel overhaul gate |
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