CN112064591B - An assembled gate bottom edge structure and repair method thereof - Google Patents
An assembled gate bottom edge structure and repair method thereof Download PDFInfo
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- CN112064591B CN112064591B CN202010799330.7A CN202010799330A CN112064591B CN 112064591 B CN112064591 B CN 112064591B CN 202010799330 A CN202010799330 A CN 202010799330A CN 112064591 B CN112064591 B CN 112064591B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
- E02B7/54—Sealings for gates
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
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Abstract
本发明涉及一种装配型闸门底缘结构及其修补方法。本发明的一种装配型闸门底缘结构包括门体、支承件、抗磨件和连接螺栓，支承件焊接固定在门体下端，抗磨件通过连接螺栓可拆连接在支承件上，抗磨件的迎水面与面板的迎水面平齐。抗磨件上端与面板之间具有间隙，抗磨件与支承件的相对面形状适配且涂抹有密封胶，在适配穿孔与间隙中均填充有环氧砂浆，通过这种方式解决了闸门底缘处的密封问题，避免闸门渗水。通过支承件的连接，以抗磨件取代了原闸门易被磨蚀破坏的面板下缘处，在抗磨件被磨蚀后凿除适配穿孔与间隙中的环氧砂浆，加热融化密封胶，拆卸连接螺栓即可实现抗磨件的快速拆除及后续的更换。
The present invention relates to an assembled gate bottom edge structure and a repair method thereof. An assembled gate bottom edge structure of the present invention includes a gate body, a support, an anti-wear part and a connecting bolt. The support is welded and fixed to the lower end of the gate body. The anti-wear part is detachably connected to the support by connecting bolts. The water-facing surface of the anti-wear part is flush with the water-facing surface of the panel. There is a gap between the upper end of the anti-wear part and the panel. The relative surfaces of the anti-wear part and the support are adapted in shape and coated with sealant. The adapted perforations and the gap are filled with epoxy mortar. In this way, the sealing problem at the bottom edge of the gate is solved to prevent water seepage in the gate. Through the connection of the support, the anti-wear part replaces the lower edge of the panel of the original gate that is easily damaged by abrasion. After the anti-wear part is abraded, the epoxy mortar in the adapted perforations and the gap is chiseled out, the sealant is heated to melt, and the connecting bolts are removed to achieve rapid removal and subsequent replacement of the anti-wear part.
Description
Technical Field
The invention relates to an assembled gate bottom edge structure and a repairing method thereof.
Background
The gate used in the hydraulic and hydroelectric engineering is a control device for flood discharge, the flow is discharged when the gate is opened, the discharge is stopped when the gate is closed, and the gate can be used for intercepting water flow, controlling water level, adjusting flow, discharging sediment, floating objects and the like. The gate structure bears the important responsibility of discharging floods and sand in the water conservancy project, a large amount of silt can be discharged through opening and closing the gate in the river with high sand content, but the bottom edge structure of the gate is also found to be damaged and destroyed to different degrees along with the operation, the analysis results in that the high-speed high-sand-content water flow is accumulated to form local defects through long-term abrasion, cavitation is induced, cavitation is caused, the coupling effect of abrasion and cavitation accelerates the local destruction, the bottom of the gate is seriously damaged through, the water stopping effect of the gate is seriously affected, and the long-term operation on site finds that the damage is mainly concentrated at the position away from the bottom edge of the lower end of the gate. The repair method in the prior art is to cut out the part with serious abrasion damage, repair the cut-out vacancy by using a proper steel plate, and repair the rest parts without serious damage by adopting a repair welding method. The disadvantage of this repair is that: the welding workload is extremely large, the strength is difficult to ensure by field welding, the structural strength is reduced by repeated repair welding of the defect part, the repair difficulty is increased, and the flood prevention and flood preparation requirements of the gate equipment are not facilitated.
Disclosure of Invention
The invention aims to provide an assembled gate bottom edge structure to solve the technical problems of long gate repairing period and high difficulty in the prior art; the invention also aims to provide a repair method of the bottom edge structure of the assembled gate.
In order to achieve the above purpose, the invention adopts the technical scheme that the bottom edge structure of the assembled gate comprises:
The bottom edge structure of the assembled gate comprises a gate body, supporting pieces, wear-resistant pieces and connecting bolts, wherein the gate body comprises a panel and main beams, the main beams are transversely arranged on the back surface of the panel at intervals up and down, the lower ends of the panel extend downwards beyond the main beams at the lowest ends to form overhanging parts, the supporting pieces are fixedly welded between the main beams and the overhanging parts, the upper ends of the back surface of the supporting pieces are abutted to the back surface of the panel, the supporting pieces are provided with bolt through holes, the wear-resistant pieces are provided with the adapting through holes which correspond to the bolt through holes one by one, the wear-resistant pieces are arranged on the back surface of the supporting pieces through the connecting bolts, the back surface of the wear-resistant pieces is level with the back surface of the panel, and the wear-resistant pieces are adapted to the opposite surfaces of the supporting pieces in shape and are coated with sealant; the adapting hole is a counter bore sunk in the water facing side, the connecting bolt is completely sunk in the adapting hole, the outer end of the connecting bolt is lower than the water facing end hole of the adapting hole, a gap is formed between the wear-resistant piece and the panel, and epoxy mortar is filled in the gap and the adapting hole outside the connecting bolt.
Further, a chamfer is machined on the back surface of the upper end of the wear-resistant piece, and the chamfer enables the width of the back water side of the gap to be larger than the width of the front water side.
Further, a mortise-tenon matching structure is arranged between the lower end of the wear-resistant piece and the lower end of the supporting piece, and sealing glue is smeared between the matching surfaces of the mortise-tenon matching structure.
Further, the mortise-tenon matching structure comprises a convex rib arranged at the lower end of the supporting piece and a groove arranged at the lower end of the wear-resistant piece.
Further, the wear member has a strength and hardness that are higher than the faceplate.
Further, the door body and the supporting piece are made of low alloy structural steel 16Mn, and the wear-resistant piece comprises a main material made of 0Cr13Ni5Mo and a tungsten carbide wear-resistant layer coated on the surface.
Further, the support piece comprises a main support part and reinforcing rib plates, wherein the reinforcing rib plates are uniformly distributed along the length direction of the main support part, and the main support part is fixed at the lower end of the door body through welding.
Further, epoxy mortar is smeared on the water facing side of the wear-resistant piece and the lower end of the panel, and the thickness of the epoxy mortar on the water facing side is gradually reduced from bottom to top so that the upper end of the epoxy mortar is smoothly transited to the panel.
The invention relates to a method for repairing a bottom edge structure of an assembled gate, which adopts the following technical scheme:
The method for repairing the bottom edge structure of the assembled gate comprises the following steps of firstly, preparing a supporting piece, an antiwear piece and a connecting bolt, wherein an adaptive hole is formed in the antiwear piece; secondly, cutting out an abrasion area at the lower part of the original gate panel, wherein the lower end of the panel can be ensured to extend out of the main beam to form an overhanging part during cutting; thirdly, enabling the upper end of the upstream surface of the supporting piece to be abutted against the upstream surface of the panel, and welding and fixing the supporting piece between the main beam at the lowest end and the overhanging part; fourthly, smearing sealant on the opposite surfaces of the anti-wear part and the support part, connecting the anti-wear part on the water facing side of the support part through a connecting bolt, enabling the anti-wear part to be tightly matched with the opposite surfaces of the support part, ensuring that the water facing surface of the anti-wear part is flush with the lower end of the water facing surface of the panel after installation, enabling a gap to be reserved between the upper end of the anti-wear part and the lower end of the panel, and enabling the outer end of the connecting bolt to be lower than an orifice of the water facing end of the adapting hole; and fifthly, filling epoxy mortar in the gap and the fit holes on the outer sides of the connecting bolts.
Further, in the first step, the main body material of the wear-resistant piece is 0Cr13Ni5Mo, and tungsten carbide wear-resistant layers are required to be coated at the upstream surface and the lower end surface which are in direct contact with water flow; the process for coating the tungsten carbide anti-abrasion layer comprises the following steps: firstly, carrying out pretreatment on a main body made of 0Cr13Ni5 Mo; secondly, depositing tungsten carbide powder on the surface of a main body by using a supersonic flame spraying technology, spraying the tungsten carbide powder for a plurality of times, cooling the main body before the temperature of the main body exceeds 100 ℃, then spraying the main body for the next time, and adding a hole sealing agent to the sprayed surface until the thickness of the coating reaches 300-350 mu m.
The invention has the beneficial effects that: the invention comprises a door body, a supporting piece, an anti-wear piece and a connecting bolt, wherein the supporting piece is welded and fixed at the lower end of the door body, the anti-wear piece is detachably connected to the supporting piece through the connecting bolt, and the upstream surface of the anti-wear piece is level with the upstream surface of the panel. The gap is formed between the upper end of the wear-resistant piece and the panel, the shape of the opposite surface of the wear-resistant piece and the opposite surface of the support piece are adapted and coated with sealant, and epoxy mortar is filled in the adapting holes and the gap, so that the sealing problem at the bottom edge of the gate is solved, and the water seepage of the gate is avoided. Through the connection of the supporting piece, the lower edge of the panel of the original gate which is easy to be abraded and damaged is replaced by the abrasion-resistant piece, epoxy mortar in the adapting perforation and the gap is chiseled after the abrasion-resistant piece is abraded, the sealant is melted by heating, and the quick dismantling and subsequent replacement of the abrasion-resistant piece can be realized by disassembling the connecting bolt.
Drawings
FIG. 1 is a schematic view of an embodiment of a bottom edge structure of an assembled gate according to the present invention;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is an enlarged partial schematic view of FIG. 2A;
fig. 4 is a front view of fig. 3.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
An embodiment of an assembled gate bottom edge structure of the present invention:
The invention relates to a specific structure of a bottom edge structure of an assembled gate, which is shown in fig. 1 to 4, and comprises a gate body 1, a supporting piece 2 and a wear-resistant piece 3. The door body 1 comprises a panel 11 and main beams 12, wherein the panel 11 plays a role in retaining water, the main beams 12 are transversely arranged on the back surface of the panel 11 at intervals up and down to play a role in strengthening, and the lower end of the panel 11 extends downwards beyond the main beam 12 at the lowest end to form an overhanging part. The support 2 is welded and fixed between the main beam 12 and the overhanging portion, and the wear-resistant member 3 is mounted on the upstream surface (i.e., in front of the support 2) by the connecting bolt 4 to play a role of water blocking.
The support 2 includes a main support portion 21 having the same length as the width of the panel 11 and reinforcing ribs 22 uniformly distributed along the length direction of the main support portion 21, and the main support portion 21 is fixed to the lower end of the door body 10 by welding. Specifically, the upper end of the back surface of the main support portion 21 is connected below the main beam 12 through a first fillet weld 23, the back surface of the main support portion 21 is connected to the lower end of the back surface of the panel 11 through a second fillet weld 24, and the back surface of the main support portion 21 abuts against the back surface of the panel 11 after connection. The support 2 is provided with a plurality of bolt through holes 25 along the length direction, the thickness of the wear-resistant piece 3 is the same as that of the panel 11, the support is provided with adapting through holes 31 corresponding to the bolt through holes 25 one by one, the connecting bolts 4 penetrate through the bolt through holes 25 and the adapting through holes 31 one by one to fix the wear-resistant piece 3 in front of the support 2, and after the wear-resistant piece 3 is installed, the upstream surface of the wear-resistant piece 3 is level with the upstream surface of the panel 11. In this embodiment, the door body 1 has an arc-shaped structure, but has a large curvature, and the abrasion part is present in a small range of the lower edge, so that the upstream surface of the abrasion-resistant member 3 can be processed into a plane. In other embodiments, the upstream surface of the wear member 3 may be formed with a curved surface having the same curvature as the panel 11.
In other embodiments, the door body 1 may also be a flat plate structure.
The adapting hole 31 is a counter bore, the connecting bolt 4 is completely sunk into the adapting hole 31, the outer end (i.e. the end towards which the head faces) of the connecting bolt is lower than the water facing end orifice of the adapting hole 31, epoxy mortar is filled in the adapting hole 31 outside the connecting bolt 4, the epoxy mortar has a sealing function, and the connecting bolt can prevent water seepage at the bolt connection part and water flow abrasion damage at the connecting bolt 4.
A gap 34 is arranged between the upper end of the wear-resistant member 3 and the lower end of the panel 11, and the gap 34 is filled with epoxy mortar which has the following functions: firstly, the sealing waterproof effect can be achieved, and the gate is prevented from water seepage; secondly, the reinforcement effect can be achieved; thirdly, the gap between the panel 11 and the abrasion resistant member 3 can be compensated, and the gap is particularly suitable for gate repairing work, because the part of the panel 11 where holes appear due to abrasion needs to be cut off on site during gate repairing, the straightness is extremely difficult to ensure, and the gap between the panel 11 and the abrasion resistant member 3 in the width direction of the gate is not a constant value.
In a more preferred embodiment, epoxy mortar is applied to both the water facing side of the wear member 3 and the lower end of the panel 11 to completely protect the wear member, and the thickness of the epoxy mortar is gradually reduced from bottom to top so that the upper end of the epoxy mortar smoothly transitions to the panel 11 to prevent the epoxy mortar from being flushed by water flow. In a specific operation, the epoxy mortar in the pouring holes 32 and the gaps 34 should be filled first, and then the lower ends of the wear-resistant piece 3 and the panel should be smoothly smeared with the epoxy mortar for leveling.
In this embodiment, the chamfer 33 is machined on the back surface of the upper end of the wear-resistant member 3, and the chamfer 33 makes the width of the back surface side of the gap 34 larger than the width of the front surface side, so that the bonding strength between the epoxy mortar and the gap 34 can be further increased. In other embodiments, the chamfer 33 may not be machined on the upper back surface of the wear member 3.
A sealant is provided between the back surface of the wear member 3 and the upstream surface of the main support portion 21 to further enhance sealing performance and prevent water seepage from the gate. In this embodiment, the lower end of the main supporting portion 21 is convex forward (protruding toward the upstream surface) to form a rib 26, the lower end of the wear-resistant member 3 is concave inward (concave on the upstream surface side) to form a groove 32 fully matching with the rib 26, and sealant is applied to the mating surfaces of the rib 26 and the groove 32. The rib 26 can be used as a positioning piece when the wear-resistant piece 3 is installed, can increase the area of an adhesive surface and the adhesive strength, can bear a part of the weight of the wear-resistant piece 3, and can reduce the shearing force applied to the connecting bolt 4. In other embodiments, other forms of mortise-tenon matching structures can be arranged between the wear-resistant piece 3 and the main supporting portion 21, and sealant is coated on the matching surfaces of the mortise-tenon matching structures so as to play a role in mounting and positioning and increasing the adhesive area.
In this embodiment, the door body 1 and the supporting member 2 are made of low alloy structural steel 16Mn, the wear-resistant member 3 is made of 0Cr13Ni5Mo, and tungsten carbide wear-resistant layers are coated on the upstream surface and the lower end surface of the door body, which are in direct contact with water flow, to further enhance wear resistance. The strength and hardness of 0Cr13Ni5Mo are better than 16Mn, so that the abrasion resistance and cavitation resistance of the abrasion resistant member 3 are better, and the tungsten carbide abrasion resistant layer coated on the upstream surface and the lower end surface can further enhance the surface strength of the abrasion resistant member 3 and can also give consideration to the economical efficiency.
In other embodiments, the tungsten carbide abrasion-resistant layer may also be coated on the outer surface of the primary material; the surface of the wear-resistant piece 3 can also adopt an epoxy carborundum wear-resistant coating; experiments prove that the abrasion condition is not serious, and the abrasion-resistant plate can be directly manufactured by using 0Cr13Ni5Mo material, so that a coating is omitted; furthermore, the high-chromium cast iron with better wear resistance can be used for manufacturing the wear-resistant plate so as to omit a coating; on the premise of not considering the improvement of the self wear resistance of the wear-resistant piece 3, the wear-resistant piece 3 can be made of the same material as the door body 1, and the effects of shortening the repairing period and reducing the repairing difficulty can be achieved.
The invention relates to an embodiment of an assembly type gate bottom edge structure repairing method, which comprises the following steps:
the invention relates to a repair method for a bottom edge structure of an assembled gate, which comprises the following steps:
The first step: the method comprises the steps of machining a proper supporting piece 2 and a proper wear-resistant piece 3 in a factory, machining a connecting bolt 4 or a purchased connecting bolt 4, machining a bolt through hole 25 on the supporting piece 2, and machining an adapting through hole 31 on the wear-resistant piece 3;
In this step, the main body material of the wear-resistant member 3 is 0Cr13Ni5Mo, and it is necessary to coat the tungsten carbide wear-resistant layer at the upstream surface and the lower end surface which directly contact the water flow. The process for coating the tungsten carbide anti-abrasion layer comprises the following steps: firstly, carrying out surface cleaning, edge and corner rounding and surface sand blasting pretreatment on a main body made of 0Cr13Ni5 Mo; secondly, the tungsten carbide powder is deposited on the surface of the main body by using a supersonic flame spraying technology, the tungsten carbide powder is sprayed for a plurality of times, the thickness of a coating sprayed for a single time is about 10 mu m, and the main body needs to be cooled after being sprayed for 1 to 2 times and then sprayed for the next time until the thickness of the coating reaches 300 mu m-350 mu m. After the spraying is finished, a hole sealing agent needs to be added to the surface so as to enable the tungsten carbide powder to be better bonded and better solidified with the workpiece. The cooling of the spraying interval is used for ensuring that the temperature of the main structural member does not exceed 100 ℃ in the spraying process and preventing the main structural member from deforming and denaturing due to the temperature rise. After detection, the tensile strength of the main body reaches 985MPa, the yield strength reaches 875MPa, and the hardness reaches 285HBS. The surface hardness of the sprayed tungsten carbide coating is not lower than 1159 (HV 0.3), and the bonding strength of the tungsten carbide coating and the main body is not lower than 70MPa.
And a second step of: cutting off the abrasion area at the lower part of the original gate panel on site, wherein the lower end of the panel 11 can be ensured to extend out of the main beam 12 to form an overhanging part during cutting;
And a third step of: the upper end of the upstream surface of the supporting piece 2 is abutted against the back surface of the panel 11, and the supporting piece 2 is welded and fixed between the main beam 12 and the overhanging part at the lowest end by welding at the positions of the first fillet weld 23 and the second fillet weld 24;
Fourth step: smearing sealant on the opposite surfaces of the antiwear piece 3 and the support piece 2, connecting the antiwear piece 3 on the upstream side of the support piece 2 through a connecting bolt 4, wherein after the antiwear piece 3 is installed, the upstream surface of the antiwear piece 3 is flush with the lower end of the upstream surface of the panel 11, and a gap 34 is formed between the upper end of the antiwear piece 3 and the lower end of the panel 11;
Fifth step: the gap 34 and the fitting hole 31 on the outer side of the connecting bolt 4 are filled with epoxy mortar.
Sixth step: and (3) coating epoxy mortar on the lower ends of the wear-resistant piece 3 and the panel 11 for leveling, wherein the thickness of the epoxy mortar is gradually reduced from bottom to top so as to smoothly transition the upper end of the epoxy mortar to the panel 11.
In other embodiments, the sixth step may also be omitted.
Experimental data of a certain hydraulic engineering of the yellow river reach show that under the condition that the adaptive perforation 31 and the gap 34 are filled with epoxy mortar, the maximum sand content is 594kg/m after approximately 800h flushing, the abrasion rate of the epoxy mortar is 15% after inspection, the damage form is most surface pits, cracks and integral peeling are less, the internal abrasion-resistant part 3 can be well protected, the abrasion-resistant part 3 and the abrasion-resistant layer on the surface of the abrasion-resistant part are not damaged or destroyed, the abrasion-resistant part 3 does not need to be replaced, and the abrasion-resistant part 3 is only required to be cured by re-smearing the epoxy mortar after the epoxy mortar is chiseled, so that the service life of the abrasion-resistant part 3 is prolonged, and the gate maintenance is facilitated.
The last explanation is: the above embodiments are only for illustrating the technical solution of the present invention, but not for limiting, and other modifications and equivalents thereof by those skilled in the art should be included in the scope of the claims of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (8)
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| CN202010799330.7A CN112064591B (en) | 2020-08-11 | 2020-08-11 | An assembled gate bottom edge structure and repair method thereof |
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| CN202010799330.7A CN112064591B (en) | 2020-08-11 | 2020-08-11 | An assembled gate bottom edge structure and repair method thereof |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212294560U (en) * | 2020-08-11 | 2021-01-05 | 黄河水利水电开发总公司 | Assembly type gate bottom edge structure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2018309C (en) * | 1989-06-06 | 2001-05-08 | Howard W. Robinson | Bladesaver assembly |
| CN2339622Y (en) * | 1998-10-26 | 1999-09-22 | 赵显臣 | Reservoir water gate fitted with wear- resisting bottom board |
| CN202595710U (en) * | 2012-05-30 | 2012-12-12 | 中国水电建设集团夹江水工机械有限公司 | Partially changeable gate panel |
| CN207295651U (en) * | 2017-08-29 | 2018-05-01 | 刘伟 | A kind of New pattern chest wall check gate |
| CN110344838B (en) * | 2019-08-22 | 2024-05-17 | 中电建铁路建设投资集团有限公司 | Soil pressure balance shield structure with gate blowout prevention structure and shield method |
| CN110777740A (en) * | 2019-12-03 | 2020-02-11 | 黄河水利委员会黄河水利科学研究院 | Reservoir drainage hole gate bottom plate based on wear-resistant nonmetal elastic coating-steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN212294560U (en) * | 2020-08-11 | 2021-01-05 | 黄河水利水电开发总公司 | Assembly type gate bottom edge structure |
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