CN113914626A - Municipal works are with cast-in-place concrete template vibrating device - Google Patents

Municipal works are with cast-in-place concrete template vibrating device Download PDF

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Publication number
CN113914626A
CN113914626A CN202111173910.6A CN202111173910A CN113914626A CN 113914626 A CN113914626 A CN 113914626A CN 202111173910 A CN202111173910 A CN 202111173910A CN 113914626 A CN113914626 A CN 113914626A
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CN
China
Prior art keywords
iii
fixed
plate
fixing
shaft
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Granted
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CN202111173910.6A
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Chinese (zh)
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CN113914626B (en
Inventor
李峰
庞广明
李辉彬
王鑫
闰广川
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Linyi Municipal Group Co Ltd
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Linyi Municipal Group Co Ltd
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Priority to CN202111173910.6A priority Critical patent/CN113914626B/en
Publication of CN113914626A publication Critical patent/CN113914626A/en
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Publication of CN113914626B publication Critical patent/CN113914626B/en
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/06Solidifying concrete, e.g. by application of vacuum before hardening
    • E04G21/08Internal vibrators, e.g. needle vibrators
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/06Solidifying concrete, e.g. by application of vacuum before hardening
    • E04G21/063Solidifying concrete, e.g. by application of vacuum before hardening making use of vibrating or jolting tools
    • E04G21/065Solidifying concrete, e.g. by application of vacuum before hardening making use of vibrating or jolting tools acting upon the shuttering

Abstract

The invention discloses a vibrating device of a cast-in-place concrete template for municipal engineering, which comprises a vibrating mechanism and a template; the vibrating mechanism is fixed on the template; the two ends of the template are provided with an inserting block II and an inserting groove II, the inserting block II is positioned on one side of the template, and the inserting groove II is positioned on the other side of the template; one end of the template is provided with an inserting groove I and a connecting plate II, and the other end of the template is provided with an inserting block I and a connecting plate II; the template is provided with longitudinal rails which are symmetrically distributed, the template is provided with transverse rails which are symmetrically distributed, and two ends of each longitudinal rail are connected with the transverse rails; the inner side of the longitudinal rail is provided with a sliding chute II and a rack, and the rack is fixed on one side of the sliding chute II; the top end of the longitudinal rail is provided with a supporting block, the supporting block is provided with a baffle plate, the baffle plate is provided with a depended wheel II, and the bottom plate of the longitudinal rail is provided with an infrared sensor III; the inner side of the transverse rail is provided with a sliding groove III, and one end of the transverse rail, which is close to the longitudinal rail, is provided with an infrared sensor II. The auxiliary vibration device can realize auxiliary vibration on the outer surfaces of the pouring formworks at different heights through the vibrator.

Description

Municipal works are with cast-in-place concrete template vibrating device
Technical Field
The invention belongs to the technical field of municipal engineering bridge construction, and particularly relates to a vibrating device for a cast-in-place concrete template for municipal engineering.
Background
An inserting type vibrator is firstly selected during the pouring process of a stand column or a bridge guardrail in municipal bridge construction; the plug-in vibrator can be operated by an operator at will, but concrete is continuously settled at the same time as the upright column is continuously poured and raised;
1) in the pouring process, the upright post main body has better mixing effect through vibration of the vibrator; after the pouring is finished and the template is disassembled, a large amount of bubbles exist on the inner surface of the template and the outer surface of the upright post at the joint of the template, and the surface is not neat; the surface vibration is not uniform, so external vibration is needed;
2) when the pouring upright post is too high, the vibrator is purely operated manually to vibrate outside the template, so that the convenience is high;
therefore, a vibration device is needed to replace the constructors to perform auxiliary vibration on pouring formworks with different heights.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a cast-in-place concrete template vibrating device for municipal engineering, which can realize auxiliary vibration on the outer surfaces of pouring templates with different heights through a vibrator.
In order to achieve the purpose, the invention adopts the technical scheme that:
a kind of municipal works use the vibrating device of the cast-in-place concrete template, including vibrating mechanism and template; the vibration mechanism is fixed on the templates, and the templates are mutually spliced to form a pouring mold; the two ends of the template are provided with an inserting block II and an inserting groove II, the inserting block II is positioned on one side of the template, and the inserting groove II is positioned on the other side of the template; one end of the template is provided with an inserting groove I and a connecting plate II, and the other end of the template is provided with an inserting block I and a connecting plate II; the template is provided with longitudinal rails which are symmetrically distributed, the template is provided with transverse rails which are symmetrically distributed, and two ends of each longitudinal rail are connected with the transverse rails.
The inner side of the longitudinal rail is provided with a sliding chute II and a rack, and the rack is fixed on one side of the sliding chute II; the top end of the longitudinal rail is provided with a supporting block, the supporting block is provided with a baffle plate, the baffle plate is provided with a depended wheel II, and the bottom plate of the longitudinal rail is provided with an infrared sensor III; the inner side of the transverse rail is provided with a sliding groove III, and one end of the transverse rail, which is close to the longitudinal rail, is provided with an infrared sensor II.
The vibration mechanism comprises a fixed seat I, a slide rail I, a mounting seat I, a mounting frame, a fixing plate I, a screw rod I, a fixing plate VI, a fixing plate II, a mounting plate III and a tightening mechanism; the slide rail I is provided with a pair of fixed plates I which are symmetrically and fixedly connected, a through groove I is formed in the side edge of the slide rail I, and a sliding groove I is formed in the inner side of the slide rail I; two ends of the sliding rail I are provided with fixing seats I, the fixing seats I are provided with motors I, and the mounting seats I are movably connected with the sliding rail I; the mounting frame is movably connected with the mounting seat I; two ends of a lead screw I are fixed on a fixed seat I through bearing seats, and the shaft end of a motor I is connected with the lead screw I through a coupler; the fixing plate VI is fixedly connected with the fixing plate I through bolts, and the fixing plate II and the mounting plate III are fixed on the fixing plate VI; the tightening mechanism is fixedly connected with the fixing plate II and the mounting plate III; lead screw I passes through threaded connection mount pad I.
A fixing plate IV is arranged at one end of the mounting seat I, idler wheels I are arranged on two sides of the other end of the mounting seat I, the idler wheels I are arranged in the sliding grooves I and play a role in supporting and guiding, a sliding rail II is arranged on the inner side of the mounting seat I, a motor II is arranged outside the mounting seat I, and a bevel gear is arranged on an output shaft of the motor II; the mounting frame comprises a fixed arm, a mounting seat II, a mounting plate I, a fixed plate V, a lead screw II and a vibrating machine; the fixed arms are provided with a pair of fixed arms and are fixedly connected through a fixed plate V; one end of the fixed arm is provided with a mounting plate I and is connected with the mounting plate I through a bolt; the other end of the fixed arm is provided with a mounting seat II; the fixed arm is arranged in the sliding rail II; two ends of the screw II are respectively connected with the mounting plate I and the fixing plate V through bearings, the screw II is movably connected with the fixing plate IV through threads, and one end of the screw II is provided with a bevel gear and is meshed with a shaft end bevel gear of the motor II; the vibrating machine is installed on the installation base II.
A pair of mounting plates II is arranged on the fixing plate II, a transmission shaft is arranged on the mounting plates II, two ends of the transmission shaft are connected with the mounting plates II through bearings, a gear I, a roller III and a chain wheel III are respectively arranged at two ends of the transmission shaft, the roller III is arranged on the outer side of the gear I, and the chain wheel III is arranged on the inner side of the gear I; a bevel gear is arranged in the middle of the transmission shaft; the motor III is fixed on the fixing plate VI and the fixing plate I, and a bevel gear is arranged on a shaft of the motor III and meshed with the bevel gear in the middle of the transmission shaft; and a group of idler wheels IV and idler wheels I are arranged on the fixing plate II, and the idler wheels I are arranged on one side of the idler wheels IV.
The mounting plate III is arranged below the fixing plate II; a motor V, a fixed block I, an electric cylinder II, a connecting rod I, a fixed block II and a rotating shaft are arranged on one side surface of the mounting plate III; a motor V is fixed at one end of the mounting plate III, and a chain wheel is arranged at the shaft end of the motor V; the fixed block I is arranged at the other end of the mounting plate III, and one side of the fixed block I is provided with a chain wheel II; the fixed block II is arranged between the motor V and the fixed block I; one end of the electric cylinder II is movably connected with the fixing block I through a pin shaft; the middle of the connecting rod I is movably connected with a fixed block II through a rotating shaft; one end of a jacking shaft of the electric cylinder II is hinged with one end of a connecting rod I, and the other end of the connecting rod I is hinged with the middle of the rotating shaft.
The other side surface of the mounting plate III is provided with a fixing frame I, a fixing seat II, a connecting rod II, a chain, a idler wheel I, a fixing plate III, an electric cylinder III and a connecting arm; the fixing frame I penetrates through the mounting plate III and is movably connected through a through hole; one end of the fixing frame I is provided with a rectangular square frame, the other end of the fixing frame I is provided with a chain wheel, and one end of the rotating shaft is arranged in the rectangular square frame; the fixed seat II is provided with a roller IV and a T-shaped guide block which are respectively positioned below and above the fixed seat II; one end of a central shaft of the roller IV on the fixed seat II is provided with a chain wheel; one end of the connecting rod II is hinged with one end of the rotating shaft, and the other end of the connecting rod II is hinged with the fixed seat II; the mounting plate III is provided with a through groove II, a through groove III and a T-shaped guide groove on the plate surface, the through groove II is arranged on one side of the through groove III, and the T-shaped guide groove is arranged on the bottom surface of the mounting plate III; the connecting rod II is arranged in the through groove II, and the T-shaped guide block is arranged in the T-shaped guide groove; a chain wheel at the shaft end of the motor V, a chain wheel II at one side of the fixing block I, a chain wheel at one end of the fixing frame I and a chain wheel at one end of the roller IV are movably connected through a chain; the chain is arranged in the through groove III; the idler wheel I is arranged in the sliding groove III, and the idler wheel IV is arranged on an extending plate surface of the sliding groove III in the transverse rail.
A T-shaped groove is formed in the bottom of the fixing plate VI, a T-shaped block is arranged at the bottom end of the fixing plate III, and the fixing plate III is inserted into the T-shaped groove through the T-shaped block; two ends of the connecting arm are fixedly connected with a fixing plate III, and a roller III, a gear I and a chain wheel III are arranged on the side surface of the fixing plate III; gyro wheel III, gear I, sprocket III pass through axis of rotation fixed connection, and bearing swing joint fixed plate III is passed through to axis of rotation one end, and gear I is located between gyro wheel III and the sprocket III.
The tightening mechanism comprises a fixing plate V, a fixing frame II, a guide shaft, a fixing shaft and a spring; the two ends of the fixing plate V are fixedly connected with a mounting plate III and a fixing plate II; the fixed frame II is provided with a guide shaft and a fixed shaft, and the guide shaft and the fixed shaft penetrate through the fixed plate V and are movably connected through a through hole; a limiting plate is arranged at the other end of the fixed shaft, the spring is sleeved on the fixed shaft, one end of the spring is in contact with the fixed plate V, and the other end of the spring is in contact with the limiting plate; a chain wheel is arranged on the fixing frame II; the chain wheel at the end of the transmission shaft is connected with the chain wheel on the fixing frame II and the chain wheel on the side face of the fixing plate III through chains.
Be equipped with electric jar I on the fixed plate I, electric jar I is fixed on fixed plate I and is located in the middle of slide rail I, and I apical axis end of electric jar is equipped with a set of bracing piece and symmetric distribution, is equipped with a plurality of gyro wheels II on the bracing piece, and I axle heads of electric jar are connected to bracing piece one end hinge, and the bracing piece is connected fixed plate I through the pivot hinge of rotating simultaneously.
Compared with the prior art, the invention has the beneficial effects that:
1) the vibrating mechanism is powered by a motor V to drive a idler wheel I and a roller wheel IV to move on the transverse track, powered by a motor III to drive a roller wheel III and a gear I to move up and down between the longitudinal tracks, and meanwhile, the vibrating mechanism can be switched between the transverse track and the longitudinal tracks, so that the vibrating requirement of pouring templates at different heights is met;
2) the mounting seat I and the mounting frame can provide power through the motor I and are driven by the lead screw I to move up and down along the sliding groove I to complete up-and-down adjustment of the vibration position of the vibration mechanism, and then the movement of the vibration mechanism on the transverse track is matched to realize the movement of the vibration position in a transverse range; the long distance adjustment of the vibration position in the up-and-down direction is realized through the longitudinal rail.
Drawings
FIG. 1 is a schematic structural view of a vibration device of a cast-in-place concrete template for municipal engineering, which is disclosed by the invention;
FIG. 2 is a schematic structural diagram of a template in the vibration device of the cast-in-place concrete template for municipal engineering, which is disclosed by the invention;
FIG. 3 is a schematic view of a connection structure of a template and a vibrating mechanism in the vibration device of the cast-in-place concrete template for municipal engineering;
FIG. 4 is a schematic structural view of a vibrating mechanism in the vibrating device for the cast-in-place concrete template for municipal engineering according to the invention;
FIG. 5 is a schematic structural view of a mounting base I and a mounting rack in the vibration device of the cast-in-place concrete template for municipal engineering, which is disclosed by the invention;
FIG. 6 is a schematic structural view of a mounting frame in the vibration device of the cast-in-place concrete template for municipal engineering of the invention;
FIG. 7 is a schematic structural view of a fixing plate II and a mounting plate III shown in FIG. 4;
FIG. 8 is a schematic view I of the mounting plate III shown in FIG. 4;
FIG. 9 is a second schematic structural view of the mounting plate III of FIG. 4;
FIG. 10 is a schematic bottom view of the mounting plate III of FIG. 9;
FIG. 11 is a schematic view of the longitudinal rail of FIG. 2;
FIG. 12 is a schematic structural view of the transverse rail of FIG. 2;
FIG. 13 is a schematic structural view of the tightening mechanism of FIG. 4;
in the figure: 1. a vibration mechanism; 101. a fixed seat I; 1011. a motor I; 102. a slide rail I; 1021. a chute I; 1022. a through groove I; 103. a mounting seat I; 1031. a fixing plate IV; 1032. a roller I; 1033. a motor II; 1034. a slide rail II; 104. a mounting frame; 1041. a fixed arm; 1042. a mounting base II; 1043. a mounting plate I; 1044. a fixing plate V; 1045. a screw II; 1046. a vibrator; 105. a fixing plate I; 1051. an infrared sensor I; 106. a screw I; 107. an electric cylinder I; 1071. a support bar; 10711. a roller II; 108. a fixing plate VI; 1081. a T-shaped groove; 109. fixing a plate II; 1091. mounting a plate II; 1092. a drive shaft; 10921. a sprocket III; 1093. a roller III; 1094. a gear I; 1095. a motor III; 1096. a idler wheel I; 1097. a roller IV; 110. mounting a plate III; 1101. a motor V; 1102. a fixed block I; 11021. a chain wheel II; 1103. an electric cylinder II; 1104. a connecting rod I; 1105. a fixed block II; 1106. a rotating shaft; 1107. a chain; 1108. a fixing frame I; 1109. a fixed seat II; 11091. a T-shaped guide block; 1110. a connecting rod II; 11001. a through groove II; 11002. a through groove III; 11003. a T-shaped guide groove; 11010. a fixing plate III; 11011. an electric cylinder III; 11012. a connecting arm; 111. a tightening mechanism; 1111. a fixing plate V; 1112. a fixing frame II; 1113. a guide shaft; 1114. a fixed shaft; 1115. a spring; 2. a template; 201. a longitudinal rail; 2011. a rack; 2012. a chute II; 2013. a baffle plate; 20131. a idler wheel II; 2014. an infrared sensor III; 2015. a support block; 202. a transverse rail; 2021. a chute III; 2023. an infrared sensor II; 203. a connecting plate I; 204. a slot I; 205. inserting a block I; 206. inserting a block II; 207. a slot II; 208. a connecting plate II; 3. concrete column.
Detailed Description
For the convenience of understanding of those skilled in the art, the technical solution of the present invention will be further described in detail with reference to fig. 1 to 13.
A municipal works use the vibrating device of the cast-in-place concrete template, including vibrating mechanism 1 and template 2; the vibration mechanism 1 is fixed on the templates 2, and the templates 2 are mutually spliced to form a pouring mold for pouring the concrete upright post 3; an inserting block II 206 and an inserting groove II 207 are arranged at the two ends of the template 2, the inserting block II 206 is positioned at one side of the template 2, and the inserting groove II 207 is positioned at the other side of the template 2; one end of the template 2 is provided with a slot I204 and a connecting plate II 208, and the other end of the template 2 is provided with an inserting block I205 and a connecting plate II 208; the template 2 is provided with longitudinal rails 201 which are symmetrically distributed, the template 2 is provided with transverse rails 202 which are symmetrically distributed, and two ends of each longitudinal rail 201 are connected with the corresponding transverse rail 202; when the adjacent templates 2 are transversely connected, the adjacent templates 2 are firstly inserted into the slots II 207 through the inserting blocks II 206 for guiding butt joint, and then the connecting plates I203 are connected through bolts; when the adjacent templates 2 are longitudinally connected, the adjacent templates are firstly inserted into the insertion blocks I205 through the insertion slots I204 for butt joint guide; then the connecting plate II 208 is connected through bolts, and the vibration mechanism 1 can ascend or descend along the longitudinal rail 201 and move along the transverse rail 202 into different areas of different templates 2 for vibration operation.
A sliding groove II 2012 and a rack 2011 are arranged on the inner side of the longitudinal rail 201, and the rack 2011 is fixed on one side of the sliding groove II 2012; a supporting block 2015 is arranged at the top end of the longitudinal rail 201, a baffle 2013 is arranged on the supporting block 2015, a leaning wheel II 20131 is arranged on the baffle 2013, and an infrared sensor III 2014 is arranged on the bottom plate of the longitudinal rail 201; the inner side of the transverse rail 202 is provided with a sliding groove III 2021, and one end of the transverse rail 202, which is close to the longitudinal rail 201, is provided with an infrared sensor II 2023.
The vibration mechanism 1 comprises a fixed seat I101, a slide rail I102, a mounting seat I103, a mounting rack 104, a fixing plate I105, a screw rod I106, a fixing plate VI 108, a fixing plate II 109, a mounting plate III 110 and a tightening mechanism 111; the slide rail I102 is provided with a pair of fixed plates I105 which are symmetrically and fixedly connected, a through groove I1022 is formed in the side edge of the slide rail I102, and a sliding groove I1021 is formed in the inner side of the slide rail I102; two ends of the sliding rail I102 are provided with fixing seats I101, the fixing seats I101 are provided with motors I1011, and the mounting seats I103 are movably connected with the sliding rail I102; the mounting frame 104 is movably connected with the mounting base I103; two ends of a lead screw I106 are fixed on a fixing seat I101 through bearing seats, and the shaft end of a motor I1011 is connected with the lead screw I106 through a coupler; the fixing plate VI 108 is fixedly connected with the fixing plate I105 through bolts, and the fixing plate II 109 and the mounting plate III 110 are fixed on the fixing plate VI 108; the tightening mechanism 111 is fixedly connected with the fixing plate II 109 and the mounting plate III 110; the lead screw I106 is connected with the mounting base I103 through threads; power is provided through a motor I1011, and a screw I106 drives a mounting seat I103 to move up and down along a sliding rail I102.
A fixing plate IV 1031 is arranged at one end of the mounting seat I103, rollers I1032 are arranged on two sides of the other end of the mounting seat I103, the rollers I1032 are arranged in the sliding groove I1021 to play a supporting and guiding role, a sliding rail II 1034 is arranged on the inner side of the mounting seat I103, a motor II 1033 is arranged outside the mounting seat I103, and a bevel gear is arranged on an output shaft of the motor II 1033; the mounting frame 104 comprises a fixed arm 1041, a mounting seat II 1042, a mounting plate I1043, a fixed plate V1044, a screw II 1045 and a vibrator 1046; a pair of fixed arms 1041 are fixedly connected through a fixed plate v 1044; one end of the fixed arm 1041 is provided with an installation plate I1043 and connected through a bolt; the other end of the fixed arm 1041 is provided with a mounting seat II 1042; the fixed arm 1041 is arranged in the sliding rail II 1034; two ends of the screw II 1045 are respectively connected with the mounting plate I1043 and the fixing plate V1044 through bearings, the screw II 1045 is movably connected with the fixing plate IV 1031 through threads, and one end of the screw II 1045 is provided with a bevel gear and is meshed with the bevel gear at the shaft end of the motor II 1033; the vibrating machine 1046 is mounted on the mounting seat II 1042; the motor II 1033 provides power to drive the screw II 1045 to rotate, so that the mounting rack 104 is driven to ascend or descend along the sliding rail II 1034 to avoid interference with the longitudinal rail 201 in the transverse movement; the motor II 1033 drives the mounting frame 104 and the vibrating machine 1046 to move up and down along the sliding rail II 1034, and the vibrating machine 1046 is controlled to contact the surface of the template 2 to vibrate.
A pair of mounting plates II 1091 are arranged on the fixing plate II 109, a transmission shaft 1092 is arranged on the mounting plates II 1091, two ends of the transmission shaft 1092 are connected with the mounting plates II 1091 through bearings, two ends of the transmission shaft 1092 are respectively provided with a gear I1094, a roller III 1093 and a chain wheel III 10921, the roller III 1093 is arranged on the outer side of the gear I1094, and the chain wheel III 10921 is arranged on the inner side of the gear I1094; a bevel gear is arranged in the middle of the transmission shaft 1092; the motor III 1095 is fixed on the fixing plate VI 108 and the fixing plate I105, and a bevel gear is arranged on the shaft of the motor III 1095 and meshed with the bevel gear in the middle of the transmission shaft 1092; a motor III 1095 provides power to drive a transmission shaft 1092 to rotate; and a group of idler wheels IV 1097 and idler wheels I1096 are arranged on the fixing plate II 109, and the idler wheels I1096 are arranged on one side of the idler wheels IV 1097.
The mounting plate III 110 is arranged below the fixing plate II 109; one side surface of the mounting plate III 110 is provided with a motor V1101, a fixed block I1102, an electric cylinder II 1103, a connecting rod I1104, a fixed block II 1105 and a rotating shaft 1106; a motor V1101 is fixed at one end of the mounting plate III 110, and a chain wheel is arranged at the shaft end of the motor V1101; the fixing block I1102 is arranged at the other end of the mounting plate III 110, and one side of the fixing block I1102 is provided with a chain wheel II 11021; the fixed block II 1105 is arranged between the motor V1101 and the fixed block I1102; one end of the electric cylinder II 1103 is movably connected with the fixing block I1102 through a pin shaft; the middle of the connecting rod I1104 is movably connected with a fixed block II 1105 through a rotating shaft; one end of a top shaft of the electric cylinder II 1103 is hinged with one end of a connecting rod I1104, and the other end of the connecting rod I1104 is hinged with the middle of a rotating shaft 1106.
The other side surface of the mounting plate III 110 is provided with a fixing frame I1108, a fixing seat II 1109, a connecting rod II 1110, a chain 1107, a idler wheel I1096, a fixing plate III 11010, an electric cylinder III 11011 and a connecting arm 11012; the fixing frame I1108 penetrates through the mounting plate III 110 and is movably connected through a through hole; one end of the fixing frame I1108 is provided with a rectangular frame, the other end of the fixing frame I is provided with a chain wheel, and one end of the rotating shaft 1106 is arranged in the rectangular frame; the fixed seat II 1109 is provided with a roller IV 1097 and a T-shaped guide block 11091 which are respectively positioned below and above the fixed seat II 1109; one end of a central shaft of a roller IV 1097 on the fixed seat II 1109 is provided with a chain wheel; one end of the connecting rod II 1110 is hinged with one end of the rotating shaft 1106, and the other end of the connecting rod II is hinged with the fixed seat II 1109; a through groove II 11001, a through groove III 11002 and a T-shaped guide groove 11003 are formed in the mounting plate III 110, the through groove II 11001 is formed in one side of the through groove III 11002, and the T-shaped guide groove 11003 is formed in the bottom surface of the mounting plate III 110; the connecting rod II 1110 is arranged in the through groove II 11001; the T-shaped guide block 11091 is arranged in the T-shaped guide groove 11003; a chain wheel at the shaft end of the motor V1101, a chain wheel II 11021 at one side of the fixing block I1102, a chain wheel at one end of the fixing frame I1108 and a chain wheel at one end of the roller IV 1097 are movably connected through a chain 1107; the chain 1107 is arranged in the through groove III 11002; the idler wheel I1096 is arranged in the sliding groove III 2021, and the roller wheel IV 1097 is arranged on the surface of an extending plate of the sliding groove III 2021 in the transverse rail 202.
The bottom of the fixed plate VI 108 is provided with a T-shaped groove 1081, the bottom end of the fixed plate III 11010 is provided with a T-shaped block, and the fixed plate III 11010 is inserted into the T-shaped groove 1081 through the T-shaped block; two ends of the connecting arm 11012 are fixedly connected with a fixing plate III 11010, and the side surface of the fixing plate III 11010 is provided with a roller III 1093, a gear I1094 and a chain wheel III 10921; the roller III 1093, the gear I1094 and the chain wheel III 10921 are fixedly connected through a rotating shaft, one end of the rotating shaft is movably connected with the fixing plate III 11010 through a bearing, and the gear I1094 is arranged between the roller III 1093 and the chain wheel III 10921.
The tightening mechanism 111 comprises a fixing plate V1111, a fixing frame II 1112, a guide shaft 1113, a fixing shaft 1114 and a spring 1115; two ends of the fixing plate V1111 are fixedly connected with a mounting plate III 110 and a fixing plate II 109; the fixing frame II 1112 is provided with a guide shaft 1113 and a fixing shaft 1114, the guide shaft 1113 and the fixing shaft 1114 penetrate through the fixing plate V1111 and are movably connected through a through hole, and the guide shaft 1113 prevents the fixing frame II 1112 from rotating; a limiting plate is arranged at the other end of the fixed shaft 1114, the spring 1115 is sleeved on the fixed shaft 1114, one end of the spring 1115 pushes against the fixed plate V1111, and the other end of the spring 1115 pushes against the limiting plate; a chain wheel is arranged on the fixing frame II 1112; a chain wheel III 10921 at the end of the transmission shaft 1092 is connected with a chain wheel on the fixed frame II 1112 and a chain wheel III 10921 at the side surface of the fixed plate III 11010 through chains; when the vibration mechanism 1 moves downwards along the longitudinal rail 201, firstly, the electric cylinder III 11011 pushes the fixing plate III 11010 to slide downwards along the T-shaped groove 1081, so that the gear I1094 at the end part of the transmission shaft 1092 and the gear I1094 at the side surface of the fixing plate III 11010 can be simultaneously connected with the racks 2011 of the upper and lower adjacent longitudinal rails 201; the climbing power of the motor III 1095 is prevented from being interrupted; the tightening mechanism 111 ensures the tightening force during the chain driving process through the spring 1115.
The connecting rod I1104 is pushed to rotate by ejecting or recovering the top shaft of the electric cylinder II 1103, so that the rotating shaft 1106 is driven to rotate, the fixing frame I1108 is driven to ascend or descend, and the fixing seat II 1109 is driven to fold towards the middle or slide towards two sides along the T-shaped guide groove 11003; the fixing frame I1108 and the chain wheels on the fixing frame I1108 play a role in tightening the chain 1107 in the whole movement process; the motor V1101 provides power to drive the roller IV 1097 on the bottom surface of the mounting plate III 110 to roll along the extension plate surface of the sliding groove III 2021, and further drives the fixing plate VI 108 and the vibrating mechanism 1 to move along the transverse rail 202.
Be equipped with I107 of electric jar on fixed plate I105, I107 of electric jar is fixed on fixed plate I105 and is located in the middle of I102 of slide rail, and I107 apical axis of electric jar end is equipped with a set of bracing piece 1071 and symmetric distribution, is equipped with II 10711 of a plurality of gyro wheels on the bracing piece 1071, and I107 axle heads of bracing piece 1071 end hinge connection electric jar, and bracing piece 1071 hinges fixed plate I105 through the axis of rotation simultaneously.
When the vibrating mechanism 1 needs to move to other templates 2 for vibrating operation, the vibrating mechanism can move and transfer along the transverse rail 202 and the longitudinal rail 201 in a matched mode; when the transverse movement is converted into the longitudinal movement, firstly, the motor V1101 drives the fixing plate I105 and the vibration mechanism 1 to move along the transverse rail 202, when the infrared sensor I1051 and the infrared sensor II 2023 are mutually interacted, the electric cylinder I107 is started and the jacking shaft is returned to enable the support rod 1071 to be retracted and unfolded by taking the rotating shaft as an axis, the support rod 1071 slides into the support block 2015 and the baffle 2013 through the roller II 10711 in the transverse movement process, the roller II 10711 and the idler II 20131 enable the support rod 1071 to slide more smoothly, and the support rod 1071 plays a role of pre-support; when the infrared sensor I1051 and the infrared sensor III 2014 sense, the motor V1101 stops rotating, the vibration mechanism 1 stops moving transversely, the top shaft of the electric cylinder II 1103 is ejected out, the fixing seat II 1109 is driven to be folded towards the middle along the T-shaped guide groove 11003 and then to be separated from the transverse track 202, the interference of the vibration mechanism 1 on the longitudinal track 201 during climbing is avoided, and the supporting rod 1071 is matched with the baffle 2013 to play a role in supporting the vibration mechanism 1 in an auxiliary mode, so that the vibration mechanism 1 is prevented from sliding down the track; then, when the climbing state is achieved, the jacking shaft of the electric cylinder I107 is continuously recovered, the supporting rod 1071 jacks the vibration mechanism 1, the motor III 1095 is started in the jacking process, the gear I1094 is meshed with the rack 2011, the roller III 1093 slides along the sliding groove II 2012, the vibration mechanism 1 is driven to climb along the longitudinal rail 201, and then the jacking shaft of the electric cylinder I107 is rapidly ejected at the moment, so that the supporting rod 1071 is gathered by taking the rotating shaft as the axis to complete recovery and reset.
When the vibration mechanism 1 selects transverse movement, firstly, the infrared sensor I1051 is closed, the electric cylinder II 1103 recovers the top shaft when the vibration mechanism 1 passes through the intersection of the transverse rail 202 and the longitudinal rail 201, and then the fixing seat II 1109 is controlled to slide towards two sides along the T-shaped guide groove, so that the symmetrically installed fixing seat II 1109 can simultaneously cross the intersection of the transverse rail 202 and the longitudinal rail 201 and contact two adjacent groups of transverse rails 202, and transverse continuous movement is realized to avoid power disconnection; the use of the through groove I1022 in the transverse moving process avoids the mutual interference between the slide rail I102 and the support block 2015 and the baffle 2013; meanwhile, when the rail moves transversely, the motor II 1033 provides power to drive the mounting rack 104 and the vibrating machine 1046 to rise along the sliding rail II 1034 so as to avoid interference with the longitudinal rail 201; when the vibration mechanism 1 descends, firstly, the electric cylinder III 11011 pushes the fixing plate III 11010 to slide downwards along the T-shaped groove 1081, so that the gear I1094 on the side surface of the fixing plate III 11010 can contact the rack 2011 connected with the downward longitudinal rail 201, and the up-and-down climbing power interruption of the motor III 1095 is avoided; the rollers III 1093 and the gears I1094 on the two sides of the fixing plate II 109 and the mounting plate III 110 move downwards along the sliding groove II 2012 and the rack 2011 to drive the vibration mechanism 1 to move downwards; the tightening mechanism 111 ensures the tensioning force of the chain in the transmission process through the action of the spring 1115; when the descending process is completed and then the transverse moving is carried out, firstly, the electric cylinder II 1103 is started to provide power to push the fixing seat II 1109 and the roller IV 1097 thereof to be dispersedly connected into the adjacent transverse rail 202 towards two sides, and then the fixing plate III 11010 is retracted through the electric cylinder III 11011 to avoid interference with the transverse rail 202.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the present invention as defined in the accompanying claims.

Claims (8)

1. A kind of municipal works use the vibrating device of the cast-in-place concrete template, including vibrating mechanism and template; it is characterized in that the vibration mechanism is fixed on the template; the plurality of templates are mutually spliced to form a pouring mold; the two ends of the template are provided with an inserting block II and an inserting groove II, the inserting block II is positioned on one side of the template, and the inserting groove II is positioned on the other side of the template; one end of the template is provided with an inserting groove I and a connecting plate II, and the other end of the template is provided with an inserting block I and a connecting plate II; the template is provided with longitudinal rails which are symmetrically distributed, the template is provided with transverse rails which are symmetrically distributed, and two ends of each longitudinal rail are connected with the transverse rails; the inner side of the longitudinal rail is provided with a sliding chute II and a rack, and the rack is fixed on one side of the sliding chute II; the top end of the longitudinal rail is provided with a supporting block, the supporting block is provided with a baffle plate, the baffle plate is provided with a depended wheel II, and the bottom plate of the longitudinal rail is provided with an infrared sensor III; a sliding groove III is formed in the inner side of the transverse rail, and an infrared sensor II is arranged at one end, close to the longitudinal rail, of the transverse rail;
the vibration mechanism comprises a fixed seat I, a slide rail I, a mounting seat I, a mounting frame, a fixing plate I, a screw rod I, a fixing plate VI, a fixing plate II, a mounting plate III and a tightening mechanism; the slide rail I is provided with a pair of fixed plates I which are symmetrically and fixedly connected, a through groove I is formed in the side edge of the slide rail I, and a sliding groove I is formed in the inner side of the slide rail I; two ends of the sliding rail I are provided with fixing seats I, the fixing seats I are provided with motors I, and the mounting seats I are movably connected with the sliding rail I; the mounting frame is movably connected with the mounting seat I; two ends of a lead screw I are fixed on a fixed seat I through bearing seats, and the shaft end of a motor I is connected with the lead screw I through a coupler; the fixing plate VI is fixedly connected with the fixing plate I through bolts, and the fixing plate II and the mounting plate III are fixed on the fixing plate VI; the tightening mechanism is fixedly connected with the fixing plate II and the mounting plate III; lead screw I passes through threaded connection mount pad I.
2. The cast-in-place concrete formwork vibrating device for municipal engineering according to claim 1, characterized in that one end of the mounting seat I is provided with a fixing plate IV, two sides of the other end of the mounting seat I are provided with rollers I, the rollers I are arranged in the sliding grooves I to play a role in supporting and guiding, the inner side of the mounting seat I is provided with a sliding rail II, the outer part of the mounting seat I is provided with a motor II, and an output shaft of the motor II is provided with a bevel gear; the mounting frame comprises a fixed arm, a mounting seat II, a mounting plate I, a fixed plate V, a lead screw II and a vibrating machine; the fixed arms are provided with a pair of fixed arms and are fixedly connected through a fixed plate V; one end of the fixed arm is provided with a mounting plate I and is connected with the mounting plate I through a bolt; the other end of the fixed arm is provided with a mounting seat II; the fixed arm is arranged in the sliding rail II; two ends of the screw II are respectively connected with the mounting plate I and the fixing plate V through bearings, the screw II is movably connected with the fixing plate IV through threads, and one end of the screw II is provided with a bevel gear and is meshed with a shaft end bevel gear of the motor II; the vibrating machine is installed on the installation base II.
3. The cast-in-place concrete formwork vibrating device for municipal engineering according to claim 1, wherein the fixing plate II is provided with a pair of mounting plates II, the mounting plates II are provided with transmission shafts, two ends of each transmission shaft are connected with the mounting plates II through bearings, two ends of each transmission shaft are respectively provided with a gear I, a roller III and a chain wheel III, the roller III is arranged on the outer side of the gear I, and the chain wheel III is arranged on the inner side of the gear I; a bevel gear is arranged in the middle of the transmission shaft; the motor III is fixed on the fixing plate VI and the fixing plate I, and a bevel gear is arranged on a shaft of the motor III and meshed with the bevel gear in the middle of the transmission shaft; and a group of idler wheels IV and idler wheels I are arranged on the fixing plate II, and the idler wheels I are arranged on one side of the idler wheels IV.
4. The cast-in-place concrete template vibrating device for municipal engineering according to claim 1, characterized in that the mounting plate III is arranged below the fixing plate II; a motor V, a fixed block I, an electric cylinder II, a connecting rod I, a fixed block II and a rotating shaft are arranged on one side surface of the mounting plate III; a motor V is fixed at one end of the mounting plate III, and a chain wheel is arranged at the shaft end of the motor V; the fixed block I is arranged at the other end of the mounting plate III, and one side of the fixed block I is provided with a chain wheel II; the fixed block II is arranged between the motor V and the fixed block I; one end of the electric cylinder II is movably connected with the fixing block I through a pin shaft; the middle of the connecting rod I is movably connected with a fixed block II through a rotating shaft; one end of a jacking shaft of the electric cylinder II is hinged with one end of a connecting rod I, and the other end of the connecting rod I is hinged with the middle of the rotating shaft.
5. The cast-in-place concrete template vibrating device for municipal engineering according to claim 4, characterized in that the other side of the mounting plate III is provided with a fixing frame I, a fixing seat II, a connecting rod II, a chain, a idler wheel I, a fixing plate III, an electric cylinder III and a connecting arm; the fixing frame I penetrates through the mounting plate III and is movably connected through a through hole; one end of the fixing frame I is provided with a rectangular square frame, the other end of the fixing frame I is provided with a chain wheel, and one end of the rotating shaft is arranged in the rectangular square frame; a roller IV and a T-shaped guide block are arranged on the fixing seat II and are respectively positioned below and above the fixing seat II, and a chain wheel is arranged at one end of a central shaft of the roller IV on the fixing seat II; one end of the connecting rod II is hinged with one end of the rotating shaft, and the other end of the connecting rod II is hinged with the fixed seat II; the mounting plate III is provided with a through groove II, a through groove III and a T-shaped guide groove on the plate surface, the through groove II is arranged on one side of the through groove III, and the T-shaped guide groove is arranged on the bottom surface of the mounting plate III; the connecting rod II is arranged in the through groove II, and the T-shaped guide block is arranged in the T-shaped guide groove; a chain wheel at the shaft end of the motor V, a chain wheel II at one side of the fixing block I, a chain wheel at one end of the fixing frame I and a chain wheel at one end of the roller IV are movably connected through a chain; the chain is arranged in the through groove III; the idler wheel I is arranged in the sliding groove III, and the idler wheel IV is arranged on an extending plate surface of the sliding groove III in the transverse rail.
6. The cast-in-place concrete template vibrating device for municipal engineering according to claim 1, characterized in that the bottom of the fixed plate VI is provided with a T-shaped groove, the bottom end of the fixed plate III is provided with a T-shaped block, and the fixed plate III is inserted into the T-shaped groove through the T-shaped block; two ends of the connecting arm are fixedly connected with a fixing plate III, and a roller III, a gear I and a chain wheel III are arranged on the side surface of the fixing plate III; gyro wheel III, gear I, sprocket III pass through axis of rotation fixed connection, and bearing swing joint fixed plate III is passed through to axis of rotation one end, and gear I is located between gyro wheel III and the sprocket III.
7. The cast-in-place concrete template vibrating device for municipal engineering according to claim 1, wherein the tightening mechanism comprises a fixing plate V, a fixing frame II, a guide shaft, a fixing shaft and a spring; the two ends of the fixing plate V are fixedly connected with a mounting plate III and a fixing plate II; the fixed frame II is provided with a guide shaft and a fixed shaft, and the guide shaft and the fixed shaft penetrate through the fixed plate V and are movably connected through a through hole; a limiting plate is arranged at the other end of the fixed shaft, the spring is sleeved on the fixed shaft, one end of the spring is in contact with the fixed plate V, and the other end of the spring is in contact with the limiting plate; a chain wheel is arranged on the fixing frame II; the chain wheel at the end of the transmission shaft is connected with the chain wheel on the fixing frame II and the chain wheel on the side face of the fixing plate III through chains.
8. The vibrating device for the cast-in-place concrete formwork for municipal engineering according to claim 1, characterized in that the fixing plate I is provided with an electric cylinder I, the electric cylinder I is fixed on the fixing plate I and located in the middle of the slide rail I, the top shaft end of the electric cylinder I is provided with a group of support rods which are symmetrically distributed, the support rods are provided with a plurality of rollers II, one end of each support rod is hinged with the end of the electric cylinder I, and the support rods are hinged with the fixing plate I through rotating shafts.
CN202111173910.6A 2021-09-29 2021-09-29 Municipal works are with cast-in-place concrete template vibrating device Active CN113914626B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115652985A (en) * 2022-12-26 2023-01-31 山东科技大学 Composite pile-barrel foundation and construction method thereof

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1006369A6 (en) * 1991-12-11 1994-08-02 Callens Henri Evarist Vibrating panel cover and covering grip for this
CN106012717A (en) * 2016-08-04 2016-10-12 中铁十七局集团第三工程有限公司 Vibratory leveling device
CN206158194U (en) * 2016-11-15 2017-05-10 中冶建工集团有限公司 Concrete vibration system
CN106836662A (en) * 2016-12-01 2017-06-13 中国二十冶集团有限公司 The concrete construction method of Curved Roof
CN108661240A (en) * 2018-05-22 2018-10-16 中国矿业大学 A kind of straight type wall structure column construction method
CN109732774A (en) * 2019-01-22 2019-05-10 江苏若琪建筑产业有限公司 A kind of overlapping sheet metal forming plate vibration device
CN110107090A (en) * 2019-05-17 2019-08-09 钱野 A kind of cast-in-place concrete electromagnetism Vibration Technology and its implementing device
CN110467112A (en) * 2019-09-18 2019-11-19 山东华泰钢结构工程有限公司 A kind of especially big formed steel construction longitudinal direction climbing device
CN110607911A (en) * 2019-09-03 2019-12-24 中建一局华江建设有限公司 Electric rail type hammering template vibrating system and construction method thereof
CN212045302U (en) * 2020-03-27 2020-12-01 江苏江扬建材机械有限公司 Porous reinforced concrete culvert pipe external mold
CN112160602A (en) * 2020-09-03 2021-01-01 中建三局集团有限公司 Integrated flat plate vibrator for concrete vibrating, surface collecting and film covering maintenance

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1006369A6 (en) * 1991-12-11 1994-08-02 Callens Henri Evarist Vibrating panel cover and covering grip for this
CN106012717A (en) * 2016-08-04 2016-10-12 中铁十七局集团第三工程有限公司 Vibratory leveling device
CN206158194U (en) * 2016-11-15 2017-05-10 中冶建工集团有限公司 Concrete vibration system
CN106836662A (en) * 2016-12-01 2017-06-13 中国二十冶集团有限公司 The concrete construction method of Curved Roof
CN108661240A (en) * 2018-05-22 2018-10-16 中国矿业大学 A kind of straight type wall structure column construction method
CN109732774A (en) * 2019-01-22 2019-05-10 江苏若琪建筑产业有限公司 A kind of overlapping sheet metal forming plate vibration device
CN110107090A (en) * 2019-05-17 2019-08-09 钱野 A kind of cast-in-place concrete electromagnetism Vibration Technology and its implementing device
CN110607911A (en) * 2019-09-03 2019-12-24 中建一局华江建设有限公司 Electric rail type hammering template vibrating system and construction method thereof
CN110467112A (en) * 2019-09-18 2019-11-19 山东华泰钢结构工程有限公司 A kind of especially big formed steel construction longitudinal direction climbing device
CN212045302U (en) * 2020-03-27 2020-12-01 江苏江扬建材机械有限公司 Porous reinforced concrete culvert pipe external mold
CN112160602A (en) * 2020-09-03 2021-01-01 中建三局集团有限公司 Integrated flat plate vibrator for concrete vibrating, surface collecting and film covering maintenance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115652985A (en) * 2022-12-26 2023-01-31 山东科技大学 Composite pile-barrel foundation and construction method thereof

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