An anti-foaming device and construction technology for precast box girder pouring

Abstract

The present invention relates to the technical field of concrete defoaming, and specifically discloses a defoaming device and a construction process for precast box girder pouring. The defoaming device for precast box girder pouring includes a mounting frame, a vibrating rod mechanism, and a lifting drive assembly. The vibrating rod mechanism includes a rod body, a mounting seat, and an avoidance mechanism. The avoidance mechanism includes a clamping assembly, an extrusion assembly, and an avoidance drive assembly. The clamping assembly includes clamping blocks and clamping elastic members. The extrusion assembly includes a rotating member, a dial rod, and extrusion elastic members. When the rod body is inserted downward into the concrete and touches the steel bars, the avoidance drive assembly can drive the rotating member to rotate around the axis of the rod body; when the rotating member drives the dial rod to rotate, the dial rod can squeeze and move the clamping blocks to clamp the rod body horizontally. When the defoaming device for precast box girder pouring of the present invention is in use, it can prevent the force of the rod body inserted into the steel bars from being too large, prevent damage to the steel bars, and prevent damage to the rod body and affect its service life.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete defoaming, and particularly relates to a defoaming device and construction technology for precast box girder pouring. Background Art

[0002] After concrete is stirred, a large number of air bubbles will remain inside. If not treated, it is easy to form defects such as honeycombing, pockmarks, and pores after pouring, resulting in a decrease in structural strength, insufficient durability, and even potential safety hazards such as cracks.

[0003] Chinese Patent Application No. CN115478694A discloses a vibrating device and method for concrete, including a vibrating rod body. The vibrating rod body includes a start control unit and a rod body, and also includes a moving vehicle body, a vibrating insertion adjustment mechanism, and a vibrating position adjustment mechanism. A carrying platform is rotatably installed on the moving vehicle body and is located above the moving vehicle body. A vibrating adjustment handle is fixedly installed on the carrying platform. When this vibrating device for concrete vibrates and defoams the poured concrete, it replaces the traditional manual hand-held vibration. Workers do not need to stand in the concrete pouring area to perform hand-held vibration on the concrete. This invention device can not only vibrate the concrete poured in a certain area, but also when vibrating the concrete, the rod body of the vibrating rod body can be vertically inserted into the interior of the concrete, and at the same time, the depth of the rod body of the vibrating rod body inserted into the interior of the concrete can be accurately controlled, and the vibrating effect is better and the practicability is higher.

[0004] The problem of the above-mentioned vibrating device for concrete when vibrating and defoaming the poured concrete is that when the rod body of the vibrating rod body is vertically inserted into the interior of the poured concrete, due to the presence of steel bars inside the concrete, the rod body may be inserted into the steel bars during the process of inserting downward into the interior of the concrete. The acting force when the rod body is inserted into the steel bars is relatively large, which will damage the steel bars and affect the strength of the steel bars, and will also damage the rod body and affect its service life. Summary of the Invention

[0005] The present invention provides a defoaming device and construction technology for precast box girder pouring, aiming to solve the problem in the above-mentioned prior art that when the vibrating device for concrete vibrates and defoams the poured concrete, the rod body being inserted into the steel bars will damage the steel bars and affect the strength of the steel bars, and will also damage the rod body and affect its service life.

[0006] In the first aspect, the defoaming device for precast box girder pouring provided by the present invention adopts the following technical solutions:

[0007] An anti-foaming device for precast box girder pouring, comprising a mounting frame, a vibrating rod mechanism and a lifting drive assembly arranged on the mounting frame. The vibrating rod mechanism includes a rod body, and also includes a mounting seat and an avoidance mechanism. The lifting drive assembly can drive the mounting seat to move up and down. The avoidance mechanism includes a clamping assembly, a pressing assembly and an avoidance drive assembly. A vertically penetrating mounting hole is formed in the mounting seat, and the rod body is vertically arranged in the mounting hole. At least two clamping assemblies are evenly spaced around the rod body. The clamping assembly includes a clamping block and a clamping elastic member. One end of the clamping elastic member is fixedly connected to the clamping block, and the other end of the clamping elastic member is fixedly connected to the mounting seat. The clamping elastic member can press the clamping block against the rod body to clamp the rod body.

[0008] The pressing assembly includes a rotating member, a dial rod and a pressing elastic member. When the rod body of the vibrating rod mechanism is inserted downward into the concrete and touches the steel bar, the avoidance drive assembly can drive the rotating member to rotate around the axis of the rod body; one end of the dial rod is rotatably arranged on the rotating member, and the rotation axis of the dial rod is parallel to the axis of the rod body. The pressing elastic member connects the dial rod and the rotating member. When the pressing elastic member is in a natural state, the other end of the dial rod extends toward the inner side of the rotation trajectory of the rotating member to form an overhanging end; when the rotating member drives the dial rod to rotate, the dial rod can press and move the clamping block that clamps the rod body horizontally.

[0009] The beneficial effects are as follows: When the anti-foaming device for precast box girder pouring of the present invention is in use, the device is first installed on the box girder, and the rod body of the vibrating rod mechanism is positioned above the concrete to be defoamed. Then, the lifting drive assembly is controlled to drive the mounting seat to move downward, thereby driving the rod body of the vibrating rod mechanism to be inserted downward into the concrete. When the rod body of the vibrating rod mechanism is inserted downward into the concrete and touches the steel bar, the rod body is blocked by the steel bar and cannot continue to move downward. At this time, the avoidance drive assembly drives the rotating member to rotate around the axis of the rod body. During the rotation, when the dial rod passes through the clamping block, it can press the clamping block, causing the clamping block to clamp the rod body and move horizontally. The rod body of the vibrating rod mechanism moves horizontally, so as to avoid the steel bar below, thereby preventing the force exerted on the steel bar by the rod body from being too large, preventing damage to the steel bar, and preventing damage to the rod body and affecting its service life.

[0010] Preferably, the rotating member is a circular tubular structure, the axis of the rotating member is collinear with the axis of the rod body, an internal gear ring is coaxially fixed on the rotating member. The avoidance drive assembly includes an avoidance drive member, a gear and a fixing frame. The fixing frame is fixed on the mounting seat, the gear is rotatably arranged on the fixing frame, the gear meshes with the internal gear ring, the rotation axis of the gear is parallel to the axis of the internal gear ring, the avoidance drive member is used to drive the gear to rotate, and one end of the dial rod is rotatably arranged on the inner peripheral surface of the rotating member.

[0011] Preferably, the vibrating rod mechanism further includes a rotary drive, a driving pulley, a driven pulley assembly, a tensioning assembly, a vibrating rotating shaft, and an eccentric block fixed on the vibrating rotating shaft. The rotary drive is fixed on the mounting base, and the output rotating shaft of the rotary drive is coaxially and fixedly arranged with the driving pulley. The rotation axis of the driving pulley is in a vertical state. The vibrating rotating shaft is coaxially and rotatably arranged in the rod body, and the upper end of the vibrating rotating shaft extends upward out of the rod body to form an outer extension end. The driven pulley assembly is coaxially arranged on the outer extension end. A transmission belt is wound between the driving pulley and the driven pulley assembly. The tensioning assembly is fixed on the mounting base, and the tensioning assembly can keep the transmission belt in a taut state all the time.

[0012] Preferably, the rod body includes a clamping section and a sliding section. The sliding section slides up and down below the clamping section. The lower end of the vibrating rotating shaft is located in the sliding section and abuts against the bottom wall of the sliding section. The vibrating rotating shaft slides up and down in the rod body. A reset elastic member is further arranged in the clamping section. One end of the reset elastic member is fixedly connected with the vibrating rotating shaft, and the other end is fixedly connected with the clamping section. The reset elastic member makes the lower end of the vibrating rotating shaft always abut against the bottom wall of the sliding section. The driven pulley assembly includes a driven pulley and a driven mating wheel. The driven pulley is coaxially and rotatably arranged at the upper end of the clamping section. The transmission belt is wound between the driving pulley and the driven pulley. The driven mating wheel is coaxially fixed on the outer extension end. Driven tooth rings capable of meshing with each other are respectively arranged on the opposite side surfaces of the driven pulley and the driven mating wheel.

[0013] The beneficial effects are as follows: When the rod body of the vibrating rod mechanism is inserted downward into the concrete and touches the steel bar, the sliding section can retract into the clamping section, and drive the vibrating rotating shaft to move upward relative to the clamping section, thereby driving the driven mating wheel to move upward, so that the driven mating wheel is disengaged from the driven pulley. At this time, the vibrating rotating shaft stops rotating and the rod body stops vibrating, so as to prevent the vibration of the rod body from damaging the steel bar when touching the steel bar. Moreover, when touching the steel bar, the retraction of the sliding section into the clamping section can prevent the acting force of the rod body inserted onto the steel bar from being too large and prevent damage to the steel bar.

[0014] Preferably, the upper end of the active pulley is also coaxially fixed with a transmission shaft, and the transmission shaft is coaxially provided with an active matching wheel, the active matching wheel and the transmission shaft are locked and rotated, and the active matching wheel slides with the transmission shaft along the axial direction of the transmission shaft, and the active matching wheel is located below the gear, and the active matching wheel and the gear are coaxially arranged, and the active matching wheel and the gear are respectively provided with active gear rings that can mesh with each other on the side surfaces opposite to the active matching wheel and the gear, and the active matching wheel forms the avoidance driving member; a synchronous lifting connecting plate is also provided between the active matching wheel and the driven matching wheel, and the synchronous lifting connecting plate includes an active plate and a driven plate, and the active plate is slidably connected to the driven plate along its length direction, and an active sleeve hole is opened at one end of the active plate away from the driven plate, and the active matching wheel is rotatably arranged in the active sleeve hole, and a driven sleeve hole is opened at one end of the driven plate away from the active plate, and the driven matching wheel is rotatably arranged in the driven sleeve hole; when the driven pulley and the driven matching wheel are meshed, the active matching wheel and the gear are in a non-meshing state.

[0015] The beneficial effect is that when the driven matching wheel moves upward, the active matching wheel can be driven to move upward synchronously through the synchronous lifting connection plate. When the driven matching wheel is out of meshing relationship with the driven pulley, the active matching wheel is driven to continue to move upward until the active matching wheel is meshed with the gear. At this time, the rotation of the active pulley will drive the gear to rotate synchronously, thereby driving the rotating part to rotate with the shifting rod. When the shifting rod passes through the clamping block, it can squeeze and shift the clamping block to clamp the rod body for horizontal movement.

[0016] Preferably, the avoidance mechanism also includes a position holding component and a linkage plate, the position holding component and the clamping block are arranged in a one-to-one correspondence, the position holding component includes a fixing rod, a sliding rod, a retaining elastic member and a linkage rod, the fixing rod is fixedly arranged on a side of the clamping block away from the rod body, the sliding rod is slidably connected to the fixing rod up and down, one end of the linkage rod is fixedly connected to the upper end of the sliding rod, the other end extends toward the rod body to form a plug-in end, one end of the retaining elastic member is fixedly connected to the linkage rod, the lower end of the sliding rod protrudes downwardly from the fixing rod, the lower end of the sliding rod is also fixedly provided with a first rack, and a second rack is fixedly provided on the mounting seat, the second rack is located below the first rack, and when the elastic member is in a natural state, the first rack is meshed with the second rack; a plug-in groove corresponding to the plug-in end of each linkage rod is opened on the linkage plate, the plug-in end of each linkage rod is inserted into the corresponding plug-in groove, and each plug-in end can move horizontally in the plug-in groove, and can drive each linkage rod to move upward synchronously when the vibrating shaft moves upward.

[0017] The beneficial effect is that when the rod body of the vibrating rod mechanism is inserted downward into the concrete and touches the steel bar, the sliding section retracts into the clamping section, and the vibrating shaft moves upward relative to the clamping section, thereby driving each linkage rod to move upward synchronously, so that the first rack and the second rack are out of meshing state, and the clamp block is no longer restricted and can move horizontally, and then the rotating member rotates with the lever, and when the lever passes through the clamp block, it squeezes and pushes the clamp block to clamp the rod body and move horizontally, avoiding the steel bar below. After the rod body avoids the steel bar below, the first rack moves downward and resets under the action of the retaining elastic member and meshes with the second rack, so that the clamp block cannot move horizontally, thereby keeping the rod body in its position.

[0018] Preferably, the rod body is provided with a clamping block, the clamping block is provided with a through hole running through the upper and lower parts, a rubber sleeve is coaxially fixedly provided on the wall of the through hole, and the rubber sleeve is fixedly provided outside the rod body; the clamping block is pressed against the clamping block to clamp the rod body.

[0019] The beneficial effects are: the arrangement of the clamping block can prevent the clamping block from damaging the rod body, and since the rubber sleeve is elastic, the arrangement of the rubber sleeve can provide a movable space for the vibration of the rod body.

[0020] Preferably, the tensioning assembly includes a support rod, a tensioning elastic member, a mounting shaft and a tensioning wheel, the support rod is fixedly arranged on the mounting seat, one end of the tensioning elastic member is fixedly arranged on the top of the support rod, the tensioning elastic member is horizontally arranged, the mounting shaft is fixedly arranged on the other end of the tensioning elastic member, the tensioning wheel is rotatably arranged on the mounting shaft, the rotation axis of the tensioning wheel is parallel to the rotation axis of the driving pulley, the transmission belt is wound around the driving pulley, the driven pulley assembly and the tensioning wheel, and the elastic force of the tensioning elastic member keeps the transmission belt in a taut state at all times.

[0021] Preferably, the vibrating shaft includes an inner shaft and an outer shaft, the outer shaft is a tubular structure, the inner shaft is inserted into the outer shaft, the upper and lower ends of the inner shaft both extend out of the outer shaft, the outer shaft and the inner shaft are fixedly engaged, and the outer shaft is slidably engaged with the inner shaft along its axial direction, a fixing seat is fixedly provided on the inner wall of the clamping section of the rod body, a through hole is opened on the fixing seat which passes through the upper and lower parts, the outer shaft is rotatably inserted in the through hole, and the eccentric block is fixedly provided on the outer shaft.

[0022] In the second aspect, the construction process of the defoaming equipment for casting prefabricated box beams provided by the present invention adopts the following technical scheme:

[0023] Construction process of a defoaming device for precast box girder pouring. Using the above-mentioned defoaming device for precast box girder pouring, it includes the following steps: S1. Install the defoaming device on the box girder and make the rod body of the vibrating rod mechanism be above the concrete to be defoamed; S2. Control the lifting drive assembly to drive the mounting seat to drive the rod body to move downward and insert into the concrete; S3. When the rod body moves downward and touches the steel bar when inserting into the concrete, control the avoidance drive assembly to drive the rotating member to rotate around the axis of the rod body. During the rotation, when the dial rod passes through the clamping block, it squeezes the clamping block, so that the clamping block clamps the rod body and moves horizontally to avoid the steel bar below.

[0024] The beneficial effects of the present invention are as follows: When the rod body of the vibrating rod mechanism moves downward and touches the steel bar when inserting into the concrete, the avoidance drive assembly drives the rotating member to rotate around the axis of the rod body. When the dial rod passes through the clamping block, it can squeeze the clamping block, so that the clamping block clamps the rod body and moves horizontally. The rod body of the vibrating rod mechanism moves horizontally to avoid the steel bar below, thereby preventing the large force when the rod body is inserted into the steel bar, preventing damage to the steel bar, and preventing damage to the rod body and affecting its service life. In addition, when the rod body of the vibrating rod mechanism moves downward and touches the steel bar when inserting into the concrete, the sliding section retracts into the clamping section to prevent the large force when the rod body is inserted into the steel bar and prevent damage to the steel bar. Moreover, after the rod body avoids the steel bar below, the first rack moves downward and resets under the action of the elastic member and meshes with the second rack, so that the clamping block cannot move horizontally, and further makes the rod body maintain its position. Description of the drawings

[0025] Figure 1 It is a schematic structural diagram of the defoaming device for precast box girder pouring of the present invention when in use.

[0026] Figure 2 It is a three-dimensional structural diagram of the defoaming device for precast box girder pouring of the present invention.

[0027] Figure 3 It is Figure 2 An enlarged view of the structure at A in

[0028] Figure 4 It is a front view of the defoaming device for precast box girder pouring of the present invention.

[0029] Figure 5 It is a three-dimensional structural diagram of the mounting seat of the defoaming device for precast box girder pouring of the present invention.

[0030] Figure 6 It is a top view of the mounting seat of the defoaming device for precast box girder pouring of the present invention.

[0031] Figure 7 It is Figure 6 A sectional view taken along the line B-B in

[0032] Figure 8 It is a cross-sectional view of the mounting base of the defoaming device for precast box girder pouring of the present invention.

[0033] Figure 9 It is a schematic structural diagram of the rod body and the driven pulley assembly of the defoaming device for precast box girder pouring of the present invention.

[0034] Figure 10 It is Figure 9 The top view of the structure in

[0035] Figure 11 It is Figure 10 The C-C cross-sectional view in

[0036] Figure 12 It is Figure 11 The enlarged view of the structure at D in

[0037] Figure 13 It is the top view of the mounting base, the vibrating rod mechanism and the avoidance mechanism of the defoaming device for precast box girder pouring of the present invention.

[0038] Figure 14 It is Figure 13 The E-E cross-sectional view in

[0039] Figure 15 It is Figure 14 The enlarged view of the structure at F in

[0040] Figure 16 It is the cross-sectional view of the mounting base, the vibrating rod mechanism and the avoidance mechanism of the defoaming device for precast box girder pouring of the present invention.

[0041] Figure 17 It is the three-dimensional structural schematic diagram of the vibrating rod mechanism and the driven pulley assembly of the defoaming device for precast box girder pouring of the present invention.

[0042] Figure 18 It is the front view of the vibrating rod mechanism and the driven pulley assembly of the defoaming device for precast box girder pouring of the present invention.

[0043] Figure 19 It is Figure 18 The enlarged view of the structure at G in

[0044] Figure 20 It is the top view of the vibrating rod mechanism and the driven pulley assembly of the defoaming device for precast box girder pouring of the present invention.

[0045] Reference numerals:

[0046] 11. Bottom plate; 12. Legs; 13. Fixed plate; 2. Lifting drive assembly; 21. Lifting motor; 22. Lead screw; 23. Lifting block; 24. Lifting guide post; 3. Mounting seat; 31. Cross bar; 32. Mounting hole; 33. Strip-shaped sliding groove; 4. Clamping assembly; 41. Clamping block; 42. Clamping elastic member; 5. Extrusion assembly; 51. Rotating member; 52. Pushing rod; 53. Extrusion elastic member; 54. Internal gear ring; 6. Avoidance drive assembly; 61. Gear; 62. Fixed frame; 71. Rod body; 711. Clamping section; 712. Sliding section; 713. Limit convex ring; 714. Nut; 72. Clamping block; 73. Rubber sleeve; 81. Rotation drive member; 82. Driving pulley; 83. Driven pulley assembly; 831. Driven pulley; 832. Driven mating wheel; 833. Driven gear ring; 834. Transmission belt; 84. Tensioning assembly; 841. Support rod; 842. Tensioning elastic member; 843. Mounting shaft; 85. Vibrating rotating shaft; 851. Inner shaft; 852. Outer shaft; 86. Eccentric block; 87. Fixed seat; 88. Return elastic member; 89. Baffle; 91. Transmission shaft; 92. Driving mating wheel; 93. Driving gear ring; 94. Synchronous lifting connecting plate; 941. Driving plate; 942. Driven plate; 951. Fixed rod; 952. Sliding rod; 953. Maintaining elastic member; 954. Linking rod; 955. First rack; 956. Second rack; 96. Linking plate; 961. Insertion slot; 10. Box girder; 101. Steel bars. Detailed implementation manners

[0047] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as a limitation to the present invention.

[0048] As Figures 1 to 20 shown, the defoaming device for precast box girder pouring according to the embodiment of the present invention includes a mounting frame, a vibrating rod mechanism, a lifting drive assembly 2 arranged on the mounting frame, a mounting seat 3 and an avoidance mechanism. The mounting frame is used for mounting on the box girder 10. The lifting drive assembly 2 can drive the mounting seat 3 to move up and down. The vibrating rod mechanism and the avoidance mechanism are mounted on the mounting seat 3. The vibrating rod mechanism is used for defoaming the concrete to be defoamed, and the avoidance mechanism is used for driving the rod body 71 of the vibrating rod mechanism to move horizontally to avoid the steel bars 101 below when the rod body 71 of the vibrating rod mechanism is inserted downward into the concrete and touches the steel bars 101.

[0049] As Figures 2 - 4As shown in the figure, the mounting bracket includes a bottom plate 11, legs 12 fixed to the bottom plate 11, and a fixing plate 13 fixed to the tops of the legs 12. The lifting drive assembly 2 includes a lifting motor 21, a lead screw 22, a lifting block 23, and a lifting guide post 24. The housing of the lifting motor 21 is fixed to the fixing plate 13. The output shaft of the lifting motor 21 passes through the fixing plate 13 and extends downward. The lead screw 22 is coaxially fixed to the output shaft of the lifting motor 21. The lifting guide post 24 is fixedly arranged on the bottom plate 11. The lifting block 23 is vertically slidably sleeved on the lifting guide post 24, and a threaded hole threadedly engaged with the lead screw 22 is formed in the lifting block 23. The lead screw 22 is inserted into the threaded hole. The mounting seat 3 is fixed to the lifting block 23 through a cross bar 31. When the lifting motor 21 operates, it drives the lead screw 22 to rotate, thereby driving the lifting block 23 to move up and down, and further driving the mounting seat 3 to move up and down.

[0050] As Figures 5 - 12 shown in the figure, the vibrating rod mechanism includes a rod body 71. A through mounting hole 32 is formed in the mounting seat 3 in the vertical direction. The rod body 71 is vertically arranged in the mounting hole 32. A rectangular clamping block 72 is sleeved outside the rod body 71. A through hole is formed in the clamping block 72 in the vertical direction. A rubber sleeve 73 is coaxially fixed to the inner wall of the through hole. The rubber sleeve 73 is fixedly sleeved outside the rod body 71. Specifically, the rod body 71 includes a clamping section 711 and a sliding section 712. The sliding section 712 is vertically slidably arranged below the clamping section 711. A limiting convex ring 713 is fixedly arranged on the outer peripheral surface of the clamping section 711 of the rod body 71. A threaded section is further arranged on the outer peripheral surface of the clamping section 711 below the limiting convex ring 713. A nut 714 is threadedly connected to the threaded section. The rubber sleeve 73 is fixed between the limiting convex ring 713 and the nut 714.

[0051] As Figures 13 - 16 shown in the figure, the avoidance mechanism includes a clamping assembly 4, a pressing assembly 5, and an avoidance drive assembly 6. Four clamping assemblies 4 are provided corresponding to the four side surfaces of the clamping block 72. The clamping assembly 4 includes a clamping block 41 and a clamping elastic member 42. Specifically, the clamping elastic member 42 is a spring. The length direction of the clamping elastic member 42 is perpendicular to the corresponding side surface of the clamping block 72. One end of the clamping elastic member 42 is fixedly connected to the clamping block 41, and the other end of the clamping elastic member 42 is fixedly connected to the mounting seat 3. The clamping elastic member 42 can press the clamping block 41 against the clamping block 72 to clamp the rod body 71. Four strip-shaped sliding grooves 33 are formed in the mounting seat 3. The extending directions of the four strip-shaped sliding grooves 33 are respectively perpendicular to the four side surfaces of the clamping block 72. The four clamping blocks 41 are respectively slidably arranged in the four strip-shaped sliding grooves 33.

[0052] As Figures 13 - 16As shown in the figure, the extrusion assembly 5 includes a rotating member 51, a lever 52, and an extrusion elastic member 53. When the rod body 71 is inserted downward into the concrete and touches the steel bar 101, the avoidance driving assembly 6 can drive the rotating member 51 to rotate around the axis of the rod body 71. One end of the lever 52 is rotatably arranged on the rotating member 51, and the rotation axis of the lever 52 is parallel to the axis of the rod body 71. The extrusion elastic member 53 connects the lever 52 and the rotating member 51. When the extrusion elastic member 53 is in the natural state, the other end of the lever 52 extends towards the inner side of the rotation trajectory of the rotating member 51 to form an overhanging end. When the rotating member 51 drives the lever 52 to rotate, the lever 52 can squeeze and move the clamping block 41 horizontally while clamping the rod body 71. Specifically, the rotating member 51 is a circular tubular structure, the axis of the rotating member 51 coincides with the axis of the rod body 71, and an internal gear ring 54 is coaxially fixed on the rotating member 51. One end of the lever 52 is rotatably arranged on the inner peripheral surface of the rotating member 51. The extrusion elastic member 53 is an elastic telescopic rod, one end of the elastic telescopic rod is fixed to the overhanging end of the lever 52, and the other end of the elastic telescopic rod abuts against the inner peripheral surface of the rotating member 51. The avoidance driving assembly 6 includes an avoidance driving member, a gear 61, and a fixing bracket 62. The fixing bracket 62 is fixed on the mounting base 3, the gear 61 is rotatably arranged on the fixing bracket 62, the gear 61 meshes with the internal gear ring 54, and the rotation axis of the gear 61 is parallel to the axis of the internal gear ring 54. The avoidance driving member is used to drive the gear 61 to rotate.

[0053] As Figures 11 - 16 shown, the vibrating rod mechanism further includes a rotation driving member 81, a driving pulley 82, a driven pulley assembly 83, a tensioning assembly 84, a vibrating rotating shaft 85, and an eccentric block 86 fixed on the vibrating rotating shaft 85. The rotation driving member 81 is a motor, the housing of the rotation driving member 81 is fixed in the mounting base 3, and the output rotating shaft of the rotation driving member 81 passes through the mounting base 3 and extends upward. The output rotating shaft of the rotation driving member 81 is coaxially fixed with the driving pulley 82, and the rotation axis of the driving pulley 82 is in the vertical state. The vibrating rotating shaft 85 is coaxially rotatably arranged in the rod body 71. The vibrating rotating shaft 85 includes an inner shaft 851 and an outer shaft 852. The outer shaft 852 is a circular tubular structure, the inner shaft 851 is inserted into the outer shaft 852, both the upper and lower ends of the inner shaft 851 extend out of the outer shaft 852, the outer shaft 852 is in non-rotating fit with the inner shaft 851, and the outer shaft 852 is in sliding fit with the inner shaft 851 along its axial direction. A fixing seat 87 is fixedly arranged on the inner wall of the clamping section 711 of the rod body 71. A through hole penetrating up and down is formed in the fixing seat 87, and the outer shaft 852 is rotatably inserted into the through hole. The eccentric block 86 is fixedly arranged on the outer shaft 852. The lower end of the inner shaft 851 of the vibrating rotating shaft 85 is located in the sliding section 712 and abuts against the bottom wall of the sliding section 712, and the inner shaft 851 slides up and down in the rod body 71.

[0054] As Figure 14As shown, a sliding groove extending along the axial direction is formed on the inner shaft 851, and a sliding block slidably engaged with the sliding groove is fixedly provided on the inner wall of the outer shaft 852. The outer shaft 852 is sleeved on the inner shaft 851 through the cooperation of the sliding block and the sliding groove. An annular convex block is coaxially and fixedly provided on the hole wall of the through hole of the fixed seat 87, and an annular groove is formed on the outer peripheral surface of the outer shaft 852. The annular convex block is rotatably installed in the annular groove. A reset elastic member 88 is further provided in the clamping section 711. One end of the reset elastic member 88 is fixedly connected to the vibrating rotating shaft 85, and the other end is fixedly connected to the clamping section 711. The reset elastic member 88 enables the lower end of the vibrating rotating shaft 85 to always abut against the bottom wall of the sliding section 712. Specifically, a baffle 89 is rotatably sleeved on the inner shaft 851, the reset elastic member 88 is a spring, one end of the reset elastic member 88 is fixed on the baffle 89, and the other end is fixed on the top inner wall of the clamping section 711.

[0055] As Figures 17 - 20 shown, the upper end of the inner shaft 851 of the vibrating rotating shaft 85 extends upward out of the rod body 71 to form an outer extension end, and the driven pulley assembly 83 is coaxially provided on the outer extension end. The driven pulley assembly 83 includes a driven pulley 831 and a driven mating pulley 832. The driven pulley 831 is coaxially and rotatably provided at the upper end of the clamping section 711, and the driven mating pulley 832 is coaxially and fixedly provided on the outer extension end. Driven gear rings 833 capable of meshing with each other are respectively provided on the opposite side surfaces of the driven pulley 831 and the driven mating pulley 832. A transmission shaft 91 is also coaxially and fixedly provided at the upper end of the driving pulley 82. A driving mating pulley 92 is coaxially provided on the transmission shaft 91. The driving mating pulley 92 is non-rotatably engaged with the transmission shaft 91 and is slidably engaged with the transmission shaft 91 along the axial direction of the transmission shaft 91. Specifically, a sliding groove extending along the axial direction is formed on the transmission shaft 91, and a slider slidably engaged with the sliding groove is fixedly provided on the hole wall of the shaft hole of the driving mating pulley 92 for installing the transmission shaft 91. The driving mating pulley 92 is sleeved on the transmission shaft 91 through the cooperation of the slider and the sliding groove. The driving mating pulley 92 is located below the gear 61 and is coaxially provided with the gear 61. Driving gear rings 93 capable of meshing with each other are respectively provided on the opposite side surfaces of the driving mating pulley 92 and the gear 61. The driving mating pulley 92 forms an avoidance driving member.

[0056] As Figures 17 - 20 shown, a synchronous lifting connecting plate 94 is further provided between the driving mating pulley 92 and the driven mating pulley 832. The synchronous lifting connecting plate 94 includes a driving plate 941 and a driven plate 942. The driving plate 941 is slidably connected to the driven plate 942 along the length direction thereof. An active sleeving hole is formed at one end of the driving plate 941 away from the driven plate 942, and the driving mating pulley 92 is rotatably provided in the active sleeving hole. A driven sleeving hole is formed at one end of the driven plate 942 away from the driving plate 941, and the driven mating pulley 832 is rotatably provided in the driven sleeving hole. When the driven pulley 831 and the driven mating pulley 832 are engaged, the driving mating pulley 92 and the gear 61 are in a non-engaged state.

[0057] As shown Figures 13 - 16 in the figure, the avoidance mechanism further includes a position-holding component and a linkage plate 96. The number of the position-holding components is the same as that of the clamping blocks 41, and the position-holding components and the clamping blocks 41 are arranged in one-to-one correspondence. The position-holding component includes a fixed rod 951, a sliding rod 952, a holding elastic member 953 and a linkage rod 954. The fixed rod 951 is fixedly arranged on the side of the clamping block 41 away from the rod body 71. The sliding rod 952 is slidably connected to the fixed rod 951 up and down. One end of the linkage rod 954 is fixedly connected to the upper end of the sliding rod 952, and the other end of the linkage rod 954 extends toward the rod body 71 to form a plug end. The holding elastic member 953 is a spring. One end of the holding elastic member 953 is fixedly connected to the linkage rod 954, and the other end of the holding elastic member 953 is fixedly connected to the fixed rod 951. The lower end of the sliding rod 952 protrudes downward from the fixed rod 951, and a horizontally arranged first rack 955 is also fixedly arranged at the lower end of the sliding rod 952. A horizontally arranged second rack 956 is fixedly arranged on the mounting seat 3, and the second rack 956 is located below the first rack 955. When the holding elastic member 953 is in a natural state, the first rack 955 meshes with the second rack 956. When the first rack 955 meshes with the second rack 956, the clamping block 41 can be limited, so that the clamping block 41 cannot move horizontally. The linkage plate 96 is located above the driven mating wheel 832. Plugging slots 961 corresponding to the plug ends of the respective linkage rods 954 are formed in the linkage plate 96, and the plug ends of the respective linkage rods 954 are inserted into the corresponding plugging slots 961 one by one, and each plug end can move horizontally in the plugging slot 961. When the vibrating rotating shaft 85 moves upward, it can push the linkage plate 96 to move upward, thereby driving the respective linkage rods 954 to move upward synchronously.

[0058] As shown Figures 17 - 20 in the figure, the tensioning assembly 84 includes a support rod 841, a tensioning elastic member 842, a mounting shaft 843 and a tensioning wheel (not shown in the figure). The support rod 841 is fixedly arranged on the mounting seat 3. The tensioning elastic member 842 is an elastic telescopic rod. One end of the tensioning elastic member 842 is fixedly arranged at the top of the support rod 841, and the tensioning elastic member 842 is arranged horizontally. The mounting shaft 843 is fixedly arranged at the other end of the tensioning elastic member 842. The tensioning wheel is rotatably arranged on the mounting shaft 843, and the rotation axis of the tensioning wheel is parallel to the rotation axis of the driving pulley 82. A transmission belt 834 is wound around the driving pulley 82, the driven pulley 831 and the tensioning wheel, and the elastic force of the tensioning elastic member 842 keeps the transmission belt 834 always in a tensioned state.

[0059] The implementation principle of the defoaming device for casting prefabricated box beams of the embodiment of the present invention is as follows: when in use, the mounting frame of the device is first mounted on the box beam 10, and the rod body 71 of the vibrating rod mechanism is located above the concrete to be defoamed, then the device is started, and the lifting drive assembly 2 is controlled to drive the mounting seat 3 to move downward, thereby driving the rod body 71 of the vibrating rod mechanism to be inserted downward into the concrete. In this process, when the rod body 71 of the vibrating rod mechanism is inserted downward into the concrete and touches the steel bar 101, the rod body 71 is blocked by the steel bar 101 and cannot continue to move downward. At this time, the sliding section 712 of the rod body 71 retracts into the clamping section 711, and moves the inner shaft 851 of the vibrating shaft 85 upward relative to the clamping section 711, thereby driving the driven matching wheel 832 to move upward, so that the driven matching wheel 832 is out of meshing relationship with the driven pulley 831, and at this time, the vibrating shaft 85 no longer rotates, and the rod body 71 no longer vibrates. When the driven matching wheel 832 moves upward, it drives the synchronous lifting connecting plate 94 to move upward, and then drives the active matching wheel 92 to move upward synchronously. After the driven matching wheel 832 and the driven pulley 831 are disengaged, the active matching wheel 92 continues to move upward until the active matching wheel 92 is engaged with the gear 61. At this time, the rotation of the active pulley 82 drives the gear 61 to rotate synchronously, thereby driving the rotating member 51 to rotate with the lever 52.

[0060] When the lever 52 rotates around the axis of the rod body 71, it passes through each clamping block 41 in sequence. When the lever 52 passes through a clamping block 41, the lever 52 squeezes the clamping block 41 and applies a horizontal squeezing force to the clamping block 41 along the corresponding strip-shaped slide groove 33 toward the rod body 71. At this time, if the rod body 71 is not blocked by the steel bar 101, the lever 52 can move the clamping block 41 to clamp the rod body 71 and move horizontally along the corresponding strip-shaped slide groove 33, so that the rod body 71 avoids the steel bar 101 below. If the rod body 71 is blocked by the steel bar 101, so that the rod body 71 cannot move horizontally along the corresponding strip groove 33, then the clamping block 41 will squeeze the lever 52 to rotate toward the inner circumference of the rotating member 51, so that the extrusion elastic member 53 is compressed, and then the lever 52 passes over the clamping block 41 and continues to rotate around the rod body 71, squeezing the next clamping block 41, until the lever 52 can push the clamping block 41 to clamp the rod body 71 and move horizontally along the corresponding strip groove 33, so that the rod body 71 avoids the steel bar 101 below.

[0061] It should be noted that when the inner shaft 851 of the vibrating shaft 85 moves upward relative to the clamping section 711, it will move upward against the linkage plate 96, thereby driving the linkage rods 954 to move upward synchronously, thereby causing the first rack 955 and the second rack 956 to disengage from the meshing state. At this time, the clamping block 41 can move horizontally, and then the rotating member 51 rotates with the lever 52. When the lever 52 passes through the clamping block 41, it squeezes and drives the clamping block 41 to clamp the rod body 71 and move horizontally to avoid the steel bar 101 below. After the rod body 71 avoids the steel bar 101 below, the inner shaft 851 will move downward and reset under the action of the reset elastic member 88, the active matching wheel 92 moves downward and disengages from the gear 61, the gear 61 no longer rotates, the driven matching wheel 832 resumes the meshing relationship with the driven pulley 831, and the driven matching wheel 832 drives the inner shaft 851, the outer shaft 852 and the eccentric block 86 to rotate, and the rod body 71 vibrates. The first rack 955 moves downward and resets under the action of the retaining elastic member 953 and meshes with the second rack 956, so that the clamping block 41 cannot move horizontally, thereby keeping the rod body 71 in its position.

[0062] When in use, the defoaming equipment for casting prefabricated box girders of the present invention can prevent the rod body 71 from vibrating and damaging the steel bar 101 when it touches the steel bar 101, and when it touches the steel bar 101, the sliding section 712 retracts into the clamping section 711 to prevent the rod body 71 from inserting into the steel bar 101 with a large force, thereby preventing damage to the steel bar 101.

[0063] The construction process of the defoaming equipment for casting a prefabricated box girder according to an embodiment of the present invention uses the defoaming equipment for casting a prefabricated box girder according to the above embodiment, and includes the following steps: S1, installing the defoaming equipment on the box girder 10, and making the rod body 71 of the vibrating rod mechanism be above the concrete to be defoamed; S2, controlling the lifting drive assembly 2 to drive the mounting seat 3 to drive the rod body 71 to move downward and insert into the concrete; S3, when the rod body 71 is inserted downward into the concrete and touches the steel bar 101, controlling the avoidance drive assembly 6 to drive the rotating member 51 to rotate around the axis of the rod body 71. During the rotation, the lever 52 squeezes the clamping block 41 when passing through the clamping block 41, so that the clamping block 41 clamps the rod body 71 and moves horizontally to avoid the steel bar 101 below.

[0064] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An anti-foaming device for precast box girder pouring, comprising a mounting frame, a vibrating rod mechanism and a lifting drive assembly arranged on the mounting frame. The vibrating rod mechanism comprises a rod body, and is characterized in that, It further includes a mounting base and an avoidance mechanism. The lifting drive assembly can drive the mounting base to move up and down. The avoidance mechanism includes a clamping assembly, a pressing assembly, and an avoidance drive assembly. A vertically penetrating mounting hole is formed in the mounting base, and the rod body is vertically arranged in the mounting hole. At least two clamping assemblies are evenly spaced around the rod body. The clamping assembly includes a clamping block and a clamping elastic member. One end of the clamping elastic member is fixedly connected to the clamping block, and the other end is fixedly connected to the mounting base. The clamping elastic member can press the clamping block against the rod body to clamp the rod body. The pressing assembly includes a rotating member, a lever, and a pressing elastic member. When the rod body is inserted downward into the concrete and touches the steel bar, the avoidance drive assembly can drive the rotating member to rotate around the axis of the rod body. One end of the lever is rotatably arranged on the rotating member, and the rotation axis of the lever is parallel to the axis of the rod body. The pressing elastic member connects the lever and the rotating member. When the pressing elastic member is in the natural state, the other end of the lever extends toward the inner side of the rotation trajectory of the rotating member to form an overhanging end. When the rotating member drives the lever to rotate, the lever can press and move the clamping block that clamps the rod body horizontally. The vibrating rod mechanism further includes a rotation drive member and a vibrating rotation shaft. The vibrating rotation shaft is coaxially rotatably arranged in the rod body, and the upper end of the vibrating rotation shaft extends upward out of the rod body to form an overhanging end. The rotation drive member controls the rotation of the vibrating rotation shaft through the overhanging end. The rod body includes a clamping section and a sliding section. The sliding section slides up and down below the clamping section. The lower end of the vibrating rotation shaft is located in the sliding section and abuts against the bottom wall of the sliding section. The vibrating rotation shaft slides up and down in the rod body. A reset elastic member is further arranged in the clamping section. One end of the reset elastic member is fixedly connected to the vibrating rotation shaft, and the other end is fixedly connected to the clamping section. The reset elastic member makes the lower end of the vibrating rotation shaft always abut against the bottom wall of the sliding section. When the rod body of the vibrating rod mechanism is inserted downward into the concrete and touches the steel bar, the sliding section can retract into the clamping section and drive the vibrating rotation shaft and its overhanging end to move upward relative to the clamping section, so that the vibrating rotation shaft is disengaged from the control of the rotation drive member.

2. The defoaming device for precast box girder pouring according to claim 1, characterized in that, The rotating member is a circular tubular structure, and the axis of the rotating member is collinear with the axis of the rod body. An internal gear ring is coaxially fixed on the rotating member. The avoidance drive assembly includes an avoidance drive member, a gear, and a fixing frame. The fixing frame is fixed on the mounting base. The gear is rotatably arranged on the fixing frame. The gear meshes with the internal gear ring. The rotation axis of the gear is parallel to the axis of the internal gear ring. The avoidance drive member is used to drive the gear to rotate. One end of the lever is rotatably arranged on the inner peripheral surface of the rotating member.

3. The defoaming device for casting precast box girders according to claim 2, wherein The vibrating rod mechanism further includes a driving pulley, a driven pulley assembly, a tensioning assembly, and an eccentric block fixed on the vibrating rotation shaft. The rotation drive member is fixed on the mounting base. The output rotating shaft of the rotation drive member is coaxially fixedly arranged with the driving pulley. The rotation axis of the driving pulley is in the vertical state. The driven pulley assembly is coaxially arranged on the overhanging end. A transmission belt is wound between the driving pulley and the driven pulley assembly. The tensioning assembly is fixed on the mounting base. The tensioning assembly can make the transmission belt always be in a taut state.

4. The defoaming device for precast box girder casting according to claim 3, characterized in that, The driven pulley assembly includes a driven pulley and a driven mating pulley. The driven pulley is coaxially rotatably arranged at the upper end of the clamping section. The transmission belt is wound between the driving pulley and the driven pulley. The driven mating pulley is coaxially fixed at the outer extension end. Driven tooth rings capable of meshing with each other are respectively arranged on the opposite side surfaces of the driven pulley and the driven mating pulley.

5. The defoaming device for precast box girder pouring according to claim 4, wherein A transmission shaft is also coaxially fixed at the upper end of the driving pulley. A driving mating pulley is coaxially arranged on the transmission shaft. The driving mating pulley is in non-rotating fit with the transmission shaft, and the driving mating pulley is slidably fitted with the transmission shaft along the axial direction of the transmission shaft. The driving mating pulley is located below the gear and is coaxially arranged with the gear. Driving tooth rings capable of meshing with each other are respectively arranged on the opposite side surfaces of the driving mating pulley and the gear. The driving mating pulley forms the avoidance driving member. A synchronous lifting connecting plate is also arranged between the driving mating pulley and the driven mating pulley. The synchronous lifting connecting plate includes a driving plate and a driven plate. The driving plate is slidably connected to the driven plate along its length direction. An active sleeve hole is opened at one end of the driving plate away from the driven plate. The driving mating pulley is rotatably arranged in the active sleeve hole. A driven sleeve hole is opened at one end of the driven plate away from the driving plate. The driven mating pulley is rotatably arranged in the driven sleeve hole. When the driven pulley and the driven mating pulley are meshed, the driving mating pulley and the gear are in a non-meshed state.

6. The defoaming device for precast box girder pouring according to claim 5, characterized in that, The avoidance mechanism further includes a position maintaining component and a linkage plate. The position maintaining components are arranged in one-to-one correspondence with the clamping blocks. The position maintaining component includes a fixed rod, a sliding rod, a maintaining elastic member, and a linkage rod. The fixed rod is fixed on the side of the clamping block away from the rod body. The sliding rod is slidably connected to the fixed rod up and down. One end of the linkage rod is fixedly connected to the upper end of the sliding rod, and the other end extends towards the rod body to form a plug-in end. One end of the maintaining elastic member is fixedly connected to the linkage rod, and the other end is fixedly connected to the fixed rod. The lower end of the sliding rod protrudes downward from the fixed rod. A first rack is also fixed on the lower end of the sliding rod. A second rack is fixed on the mounting seat. The second rack is located below the first rack. When the maintaining elastic member is in a natural state, the first rack is meshed with the second rack. Plug-in slots corresponding to the plug-in ends of the respective linkage rods are opened on the linkage plate. The plug-in ends of the respective linkage rods are inserted into the corresponding plug-in slots. Each plug-in end can horizontally move in the plug-in slot. When the vibrating rotating shaft moves upward, it can drive the respective linkage rods to move upward synchronously.

7. The defoaming device for precast box girder pouring according to any one of claims 1-6, characterized in that, A clamping block is sleeved outside the rod body. A through hole penetrating up and down is opened on the clamping block. A rubber sleeve is coaxially fixed on the inner wall of the through hole. The rubber sleeve is fixedly sleeved outside the rod body. The clamping block abuts against the clamping block to clamp the rod body.

8. The defoaming device for precast box girder pouring according to any one of claims 3-6, characterized in that The tensioning assembly includes a support rod, a tensioning elastic member, a mounting shaft, and a tensioning pulley. The support rod is fixedly arranged on the mounting seat. One end of the tensioning elastic member is fixedly arranged at the top of the support rod. The tensioning elastic member is horizontally arranged. The mounting shaft is fixedly arranged at the other end of the tensioning elastic member. The tensioning pulley is rotatably arranged on the mounting shaft. The rotation axis of the tensioning pulley is parallel to the rotation axis of the driving pulley. The transmission belt is wound between the driving pulley, the driven pulley assembly, and the tensioning pulley. The elastic force of the tensioning elastic member keeps the transmission belt always in a taut state.

9. The defoaming device for precast box girder casting according to any one of claims 4-6, characterized in that, The vibrating rotating shaft includes an inner shaft and an outer shaft. The outer shaft is a circular tubular structure. The inner shaft is inserted into the outer shaft, and both the upper and lower ends of the inner shaft extend outside the outer shaft. The outer shaft is in non-rotating fit with the inner shaft, and the outer shaft is slidably fitted with the inner shaft along its axial direction. A fixed seat is fixedly arranged on the inner wall of the clamping section of the rod body. A through hole penetrating up and down is formed on the fixed seat. The outer shaft is rotatably inserted into the through hole, and the eccentric block is fixedly arranged on the outer shaft.

10. Construction process of a defoaming device for precast box girder pouring, characterized in that, When using the defoaming device for precast box girder pouring according to any one of claims 1-9, the following steps are included: S1. Install the defoaming device on the box girder and make the rod body of the vibrating rod mechanism above the concrete to be defoamed; S2. Control the lifting drive assembly to drive the mounting seat to drive the rod body to move downward and insert into the concrete; S3. When the rod body touches the steel bar when inserting downward into the concrete, control the avoidance drive assembly to drive the rotating member to rotate around the axis of the rod body. During the rotation, when the dial rod passes through the clamping block, it squeezes the clamping block, so that the clamping block clamps the rod body and moves horizontally to avoid the steel bar below.

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