Operation method of gravel laying equipment for box girder support embedded plate

Abstract

The invention discloses macadam laying equipment for a box girder support embedded plate and an operation method thereof.The macadam laying equipment comprises a macadam placing mechanism, a macadam pressing mechanism and a support embedded plate placing table, the macadam placing mechanism and the macadam pressing mechanism are both installed on a walking mechanism, and the support embedded plate placing table is used for placing the support embedded plate; the walking mechanism is installed on one side of the support pre-buried plate placing table, the gravel placing mechanism can place gravel on a support pre-buried plate, and the gravel pressing mechanism can downwards extrude the placed gravel. The broken stone laying equipment composed of the broken stone placing mechanism, the broken stone pressing mechanism and the support embedded plate placing table is adopted, accurate broken stone laying can be achieved, the broken stone laying quality and position precision are improved, the problems of high labor intensity and time and labor waste caused by manual laying are solved, laying pressing is conducted through automatic walking, and the efficiency is high.

Description

Technical Field

[0001] The invention belongs to the technical field of crushed stone paving equipment for box girder support embedded plates, and relates to crushed stone paving equipment for box girder support embedded plates and an operating method thereof. Background Art

[0002] As an important part of high-speed railways, bridge engineering has always been the highlight and image of a railway. Box girders have always had a common feature, that is, the prevention and control of hollow noise in the embedded support plates has always been an important problem that has plagued construction. The integrated embedded support plates of 40m box girders are 30% larger than ordinary embedded support plates, with a thickness of 30mm. They are thicker and larger than ordinary supports, and are more prone to hollow noise in the embedded support plates. During the construction process, it was found that the hollow noise rate of the integrated supports was much higher than that of ordinary supports, reaching an astonishing 85%. The prevention and control of hollow noise in the embedded support plates is more difficult and is a major problem.

[0003] The Chinese patent application (application number 201911131966.8) discloses a method for preventing the hollow noise of epoxy resin bearings, which includes the following steps: first, clean the surface of the bearing embedded plate; then, place a steel mesh on the embedded plate, then apply epoxy resin glue on the outside of the steel mesh, and finally, arrange gravel on the surface of the epoxy resin glue. The patent adopts manual placement of gravel, which is time-consuming and labor-intensive, and the placement of gravel is inaccurate and inadequate, which easily affects the effect of preventing the hollow noise of the bearing embedded plate. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a crushed stone paving device for a box girder support embedded plate and an operation method thereof, which saves time and labor, can realize accurate placement of crushed stone paving, and press to tightly hold the crushed stone.

[0005] In view of the above problems, the technical solution adopted by the present invention is: a gravel paving equipment for box girder support embedded plates, including a gravel placing mechanism, a gravel pressing mechanism and a support embedded plate placing table, the gravel placing mechanism and the gravel pressing mechanism are both installed on a walking mechanism, the support embedded plate placing table is used to place the support embedded plates, the walking mechanism is installed on one side of the support embedded plate placing table and the gravel placing mechanism can place gravel on the support embedded plates, and the gravel pressing mechanism can squeeze the placed gravel downward.

[0006] Furthermore, the above-mentioned gravel placement mechanism includes a first column, a linear moving module, a double-rod lifting cylinder, a storage hopper, a discharging mechanism and a discharging nozzle. The lower end of the first column is installed on the walking mechanism, one end of the linear moving module is horizontally and vertically fixedly connected to the first column, the cylinder seat of the double-rod lifting cylinder is fixedly connected to a slider arranged on the front side of the linear moving module, the storage hopper is installed on the cylinder seat of the double-rod lifting cylinder, the discharging mechanism is installed at the discharging port of the storage hopper and is used to deliver the gravel one by one, and the discharging nozzle is vertically installed at the ends of the two cylinder rods of the double-rod lifting cylinder, and is connected to the discharging port of the storage hopper through a hose.

[0007] Furthermore, the above-mentioned discharging mechanism includes a discharging rotating disk, a swing rod, a return spring and a connecting rope. The discharging rotating disk is rotatably connected to the discharging port through a rotating shaft and can block the discharging port. A feeding U-shaped groove is arranged on the discharging rotating disk. The feeding U-shaped groove accommodates a piece of gravel. The outer end of the rotating shaft is fixedly connected to the swing plate, the upper side of the free end of the swing rod is connected to the outer surface of the storage hopper through a return spring, and the lower side of the free end of the swing rod is connected to the fixed rod vertically fixed at the end of the cylinder rod of the double-rod lifting cylinder through a connecting rope. When the cylinder rod is extended to the longest, the feeding U-shaped groove can be rotated 150 degrees and a piece of gravel can be sent from the inside of the storage hopper to the hose.

[0008] Furthermore, the above-mentioned gravel paving equipment for box girder support embedded plates also includes a three-dimensional laser scanner, which is used to identify the image of the gravel placement area for modeling and modeling of threaded steel bars embedded in the support embedded plates. The three-dimensional laser scanner is installed on a scanner bracket, the scanner bracket is installed on the walking mechanism, and the scanner bracket is located in front of the gravel placement mechanism.

[0009] Furthermore, the above-mentioned gravel paving equipment for embedded plates of box girder supports also includes a camera, which is used to identify quality inspection after placing the gravel. The camera is installed on the walking mechanism through a camera bracket and is located behind the gravel pressing mechanism.

[0010] Furthermore, the above-mentioned gravel pressing mechanism includes a pressing plate and a pressing double-rod cylinder. The pressing plate is provided with corresponding through holes that avoid the screws and steel bars on the embedded plate of the support. The cylinder rod end of the pressing double-rod cylinder is fixedly connected to the upper end surface of the pressing plate. The cylinder seat of the pressing double-rod cylinder is vertically fixedly connected to the cantilever frame. The cantilever frame is installed on the walking mechanism. A high-density sponge layer is provided at the bottom of the pressing plate, and a accommodating hole is provided at the bottom of the high-density sponge layer. An elastic pressing mechanism is vertically installed in the accommodating hole. The elastic pressing mechanism includes a pressing plate and a spring. The pressing plate is connected to the bottom surface of the pressing plate through the spring.

[0011] Beneficial effects of the present invention: Compared with the prior art, the effects of the present invention are as follows:

[0012] (1) The present invention adopts a gravel paving device composed of a gravel placing mechanism, a gravel pressing mechanism and a support embedded plate placing platform, which can achieve accurate gravel paving, improve the gravel paving quality and position accuracy, reduce the labor intensity, time and labor consumption caused by manual paving, and automatically walk to pave and press, which is highly efficient;

[0013] (2) The use of columns, linear moving modules and lifting cylinders can achieve accurate positioning of the discharge nozzle, and the gravel is laid accurately and evenly without overlapping or contacting. The storage hopper is used to directly store the gravel and the discharge mechanism is used to discharge the gravel, which greatly improves the discharge efficiency. The discharge is carried out by grain, and the feeding is accurate.

[0014] (3) A discharging mechanism linked to the telescopic movement of the double-rod cylinder is adopted. When the double-rod cylinder is extended, the discharging rotating disk is pulled to rotate for automatic mechanical feeding. The equipment is greatly simplified. After the feeding is completed and the next crushed stone is fed back, the reset spring resets the discharging rotating disk. The double-rod cylinder serves to send the discharging nozzle to the laying position to put the crushed stone down at a low position and serves as the power of the discharging mechanism, playing a dual role. The structure is greatly simplified and the cost is greatly reduced. The U-shaped groove material collection method has a simple structure and the material collection quantity is easy to control when the particle difference is not large. The 150-degree rotation and swing angle can meet the requirements of material collection and unloading.

[0015] (4) The 3D laser scanner is used to identify the image of the gravel placement area for modeling and the modeling of the threaded steel bars embedded in the support embedded plate. According to the established model of the location to be laid and the gravel laying spacing requirements, the linear module, double-rod telescopic cylinder and walking mechanism are controlled to achieve fast and accurate laying, avoiding large errors caused by inaccurate positioning or manual alignment;

[0016] (5) Use cameras to inspect the quality of the laid gravel, such as detecting gaps, overlaps, and contacts between gravel. If gaps are detected, fill them with gravel. If overlaps or contacts between gravel are detected, correct them manually to ensure the quality of the laid gravel.

[0017] (6) The slider guide pair and ball screw nut pair are used for directional walking support and drive, which ensures smooth walking, precise positioning and fast movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 To make a flow chart of the method for controlling the empty sound of the embedded plate;

[0019] Figure 2 This is a schematic diagram of the structure of the crushed stone paving equipment;

[0020] Figure 3 It is a schematic diagram of the front cross-sectional structure of the discharging mechanism;

[0021] Figure 4 It is a schematic diagram of the rear cross-sectional structure of the discharging mechanism;

[0022] Figure 5 This is a schematic diagram of the installation structure of the discharging mechanism from the side;

[0023] Figure 6 It is a schematic diagram of the installation structure of the elastic pressing mechanism;

[0024] Figure 7 This is a schematic diagram of the installation structure of the 3D laser scanner;

[0025] Figure 8 This is a schematic diagram of the camera installation structure;

[0026] Fig. 9 It is a schematic diagram of the walking mechanism structure. DETAILED DESCRIPTION

[0027] The invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] Example 1: Figure 2-9 As shown, a gravel paving equipment for box girder support embedded plates, the gravel paving equipment includes a gravel placing mechanism 1, a gravel pressing mechanism 2 and a support embedded plate placing platform 3, the gravel placing mechanism 1 and the gravel pressing mechanism 2 are both installed on a walking mechanism 4, the support embedded plate placing platform 3 is provided with a placing groove 5, the placing groove 5 is used to place the support embedded plate 6, the walking mechanism 4 is installed on one side of the support embedded plate placing platform 3 and the gravel placing mechanism 2 can place the gravel on the support embedded plate 6, the gravel pressing mechanism 2 can squeeze the placed gravel downward, the gravel paving equipment composed of the gravel placing mechanism, the gravel pressing mechanism and the support embedded plate placing platform can realize accurate laying of gravel, improve the quality of gravel paving, reduce the problems of high labor intensity, time and labor caused by manual paving, and can automatically walk for laying and pressing, with high efficiency.

[0029] In order to improve the speed and accuracy of gravel placement, the gravel placement mechanism 1 includes a first column 101, a linear motion module 102, a double-rod lifting cylinder 103, a storage hopper 104, a discharging mechanism 105 and a discharging nozzle 106. The lower end of the first column 101 is installed on the walking mechanism 4, one end of the linear motion module 102 is horizontally and vertically fixedly connected to the first column 101, the cylinder seat of the double-rod lifting cylinder 103 is fixedly connected to the slider 107 arranged on the front side of the linear motion module 102, the storage hopper 104 is installed on the cylinder seat of the double-rod lifting cylinder 103, and the discharging nozzle 106 is installed on the cylinder seat of the double-rod lifting cylinder 103. The material mechanism 105 is installed at the discharge port of the storage hopper 104 and is used to deliver the crushed stones one by one. The discharge nozzle 106 is vertically installed at the ends of the two cylinder rods of the double-rod lifting cylinder 103, and is connected to the discharge port of the storage hopper 104 through a hose 108. The use of columns, linear moving modules and lifting cylinders can achieve precise positioning of the discharge nozzle, and the gravel is laid accurately and evenly without overlapping or contact problems. The storage hopper is used to directly store the gravel and the discharge mechanism is used for discharging, which greatly improves the discharging efficiency, and the material is discharged by particle, and the feeding is accurate.

[0030] In order to simplify the discharging mechanism, the discharging mechanism 105 includes a discharging rotating disk 109, a swing rod 110, a return spring 111 and a connecting rope 112. The discharging rotating disk 109 is rotatably connected to the discharging port through a rotating shaft 113 and can block the discharging port. A feeding U-shaped groove 114 is provided on the discharging rotating disk 109. The feeding U-shaped groove 114 accommodates a gravel. The outer end of the rotating shaft 113 is fixedly connected to the swing plate 110. The upper side of the free end of the swing rod 110 is connected to the outer surface of the storage hopper 104 through a return spring 111. The lower side of the free end of the swing rod 110 is connected to the double rod 112 through a connecting rope The fixed rod 115 is vertically fixedly connected at the end of the cylinder rod of the lifting cylinder 103. When the cylinder rod is extended to the longest, the feeding U-shaped groove 114 can be rotated 150 degrees and a gravel can be sent from the inside of the storage hopper 104 to the hose 108. The three-dimensional laser scanner is used to identify the image of the gravel placement area for modeling and the threaded steel bars embedded in the support embedded plate. According to the established model of the position to be laid and the requirements for the gravel laying spacing, the linear module, the double-rod telescopic cylinder and the walking mechanism are controlled to carry out fast and accurate laying, thereby avoiding large errors caused by inaccurate positioning or manual alignment.

[0031] In order to automatically carry out modeling, a model basis is not provided for paving. The above-mentioned gravel paving equipment also includes a three-dimensional laser scanner 7. The three-dimensional laser scanner 7 is used to identify the image of the gravel placement area for modeling and the modeling of the threaded steel bars embedded in the support embedded plate. The three-dimensional laser scanner 7 is installed on the scanner bracket 8, and the scanner bracket 8 is installed on the walking mechanism 4. The scanner bracket 8 is located in front of the gravel placement mechanism 1. The three-dimensional laser scanner is used to identify the image of the gravel placement area for modeling and the modeling of the threaded steel bars embedded in the support embedded plate. According to the established model of the position to be laid and the gravel paving spacing requirements, the linear module, the double-rod telescopic cylinder and the walking mechanism are controlled to carry out fast and accurate paving, thereby avoiding large errors caused by inaccurate positioning or manual alignment.

[0032] In order to evaluate the quality of gravel paving, the above-mentioned gravel paving equipment also includes a camera 9, which is used to identify the quality inspection after the gravel is placed. The camera 9 is installed on the walking mechanism 4 through the camera bracket 10 and is located behind the gravel pressing mechanism 2. The camera is used to perform quality inspection on the laid gravel, such as the detection of gaps, overlaps and contacts of gravel. If gaps are judged, gravel is filled in. If gravel overlaps and contacts occur, manual correction is performed to ensure the quality of gravel paving.

[0033] In order to achieve fast and accurate position movement, the above-mentioned walking mechanism 4 includes a walking platform 401, a slider guide pair 402 and a ball screw nut pair 403. The walking platform 401 is connected to the ground through two slider guide pairs 402. The nut of the ball screw nut pair 403 is fixedly connected to the nut seat 404 at the bottom of the walking platform 401. Both ends of the screw of the ball screw nut pair 403 are connected to the ground through a bearing seat 407 and one end is extended and connected to a drive motor 405. The drive motor 405 is installed on the ground through a motor frame 406. The slider guide pair and the ball screw nut pair are used for directional walking support and drive, so that the walking is smooth, the position is accurate, and the movement is fast.

[0034] In order to realize rapid pressing of crushed stones, the crushed stone pressing mechanism 2 includes a pressing plate 201 and a pressing double-rod cylinder 202. The pressing plate 201 is provided with corresponding through holes avoiding the screws and steel bars on the embedded plate of the support. The cylinder rod end of the pressing double-rod cylinder 202 is fixedly connected to the upper end surface of the pressing plate 201. The cylinder seat of the pressing double-rod cylinder 202 is vertically fixedly connected to the cantilever frame 203. The cantilever frame 203 is installed on the walking mechanism 4. The bottom of the pressing plate 201 is provided with a high-density sponge layer 204, and the bottom of the high-density sponge layer 204 is provided with a receiving hole 20 5. An elastic pressing mechanism 206 is vertically installed in the accommodating hole 205. The elastic pressing mechanism 206 includes a pressing plate 207 and a spring 208. The pressing plate 207 is connected to the bottom surface of the pressing plate 201 through the spring 208. When in use, the cylinder rod of the double-rod cylinder is controlled to extend, and the pressing plate presses the gravel. Then, under the elastic action of the elastic pressing mechanism, the gravel of different heights can be effectively pressed into place, avoiding poor stability caused by inadequate pressing. The use of a high-density sponge layer can effectively play a role in pressing stability.

[0035] Embodiment 2: An operating method of a gravel paving device for a box girder support embedded plate, the method comprising: a three-dimensional laser scanner is used to identify an image of a gravel placement area for modeling and to model threaded steel bars embedded in the support embedded plate; control parameters are set for a linear module, a double-rod telescopic cylinder, and a walking mechanism according to the established model of the position to be laid and the gravel laying spacing requirements; according to the control parameter settings, a gravel placement mechanism moves the gravel and discharges it onto the epoxy resin layer coated on the embedded plate; after the placement is completed, a gravel pressing mechanism is used to press it; after the pressing is completed, a camera is used to collect data images; the gravel paving situation is captured based on the gravel paving image captured by the image; if it is captured that gravel is missing, the gravel placement mechanism is controlled to supplement the laying of gravel at that point, and the gravel pressing mechanism is used to press it again; image collection and comparison are performed again until the design requirements are met and the gravel paving is completed.

[0036] After modeling with a 3D laser scanner, the automated parameters are extracted for gravel paving, which can greatly improve the paving accuracy and quality, reduce the probability of empty sound, and use image comparison to ensure that the paving quality meets the requirements.

[0037] Example 3: Reference Figure 1-9 A method for controlling the hollow sound of the embedded plate of the integrated support of a 40m box girder of a high-speed railway is provided, and the method comprises the following steps:

[0038] Step 1. Material selection: Epoxy resin uses two-component epoxy resin material;

[0039] According to the needs of on-site construction, epoxy resin materials with excellent ductility, low viscosity, small shrinkage, and low heat release after hardening were purchased in advance. Two-component epoxy resin materials were selected. Its performance indicators are as follows:

[0040] Table 1 Epoxy resin performance indicators

[0041] Serial number Inspection items Standard regulations Test results 1 <![CDATA[Slurry density / g / cm 3 > ＞1.00 1.16 2 Initial viscosity / mPa.s ＜200 190 3 Operation time / min ≥30 50 4 Compressive strength / MPa ≥70 70 5 Tensile shear strength / MPa ≥8.0 8.5 6 Tensile strength / MPa ≥15 20 7 Bond strength / MPa ≥4.0 6.0 8 Impermeability pressure / MPa ≥1.2 1.5 9 Osmotic pressure ratio / % ≥400 450

[0042] Use a 10-20mm sieve for screening to prevent small diameter gravel from mixing in and affecting the grading of concrete aggregate above the embedded plate of the bearing.

[0043] Before construction, the on-site management personnel and formwork team were briefed on the construction technology of the 40m beam integrated support embedded plate air noise control method. The briefing included epoxy resin mixing, gravel screening, drying, epoxy resin painting, epoxy resin painting time, thickness, gravel paving spacing, etc.

[0044] After the 40m beam integrated support embedded plate is pasted with anti-air sound gravel, it should be used after the epoxy resin is dry to ensure that all gravel is firmly pasted. After the gravel is laid, it should be covered to prevent dust from entering and placed in a cool place to prevent exposure to the sun or rain from affecting the bonding force of the epoxy resin and the bonding effect of the gravel. When taking the embedded plate of the support with the gravel pasted, check whether the gravel is firmly pasted. The integrated support embedded plate can be installed only after checking that the gravel is firmly bonded;

[0045] The crushed stones should be bonded evenly, without overlapping or close contact, to ensure a firm bond. After the embedded support plate is installed, Φ16 steel bars should be evenly placed, and the length of the steel bars should be slightly smaller than the width of the support.

[0046] Step 2: Gravel screening: Use the gravel for beam concrete, use a screen to screen out 10-16mm gravel, and use a baking oven to dry the gravel to prevent residual moisture from affecting the bonding ability of the epoxy resin;

[0047] Step 3, gravel pasting: Gravel pasting should be carried out 2 days in advance. Before epoxy resin pasting, prepare gravel, bearing embedded plate, and epoxy resin AB component materials; first, pour the epoxy resin of AB component into a clean mixing bucket in a 1:1 ratio, and use a forced mixer to stir to ensure that the epoxy resin is evenly mixed. After the mixture is evenly mixed, there should be no bubbles or color difference before use, and it must be used within its operable time. Place the bearing embedded plate on a flat site, and evenly apply epoxy resin on the bearing embedded plate with a thickness of 1-3mm. The amount of epoxy resin applied to a single bearing embedded plate should be controlled at 500g to ensure sufficient bonding strength while not being too much, so that the gravel is completely covered with epoxy resin; gravel paving should be carried out within the operable time of epoxy resin. When paving, sprinkle the gravel evenly on the bearing embedded plate to ensure that the gravel does not overlap and the gravel is not tightly attached to the gravel to prevent the gravel from being loosely bonded;

[0048] Step 4: Install the embedded support plate: When installing the embedded support plate, check whether the epoxy resin is completely dry and whether the gravel is firmly bonded. It is strictly forbidden to use the embedded support plate if the epoxy resin is not dry and the gravel is not firmly bonded. After the inspection is qualified, place 3 Φ16 steel bars evenly spaced on the embedded support plate to support the steel cage, ensuring that there is a gap between the steel cage and the gravel to prevent the steel cage from crushing the pasted gravel;

[0049] Step 5: Reserve the chamfered template for the inner cavity at the beam end for later installation: After the steel cage is put into the mold, install the box beam inner mold and the embedded parts of the beam deck normally. After all the processes are completed and the template installation meets the requirements, mark the support cylinder and support rod of the chamfered inner mold at the beam end before pouring the concrete to ensure that the template can be accurately closed after the concrete pouring at the embedded plate of the support is completed, and the size meets the design requirements;

[0050] Step 6. Concrete pouring at the embedded plate of the bearing: When pouring concrete at the embedded plate of the bearing, first use a flashlight to observe whether there is concrete above the embedded plate of the bearing. The pouring thickness should not be too high. When it is controlled at about 200mm, start vibrating with an inserted vibrator. At the same time, start the attached vibrator and the pneumatic trolley vibrator to assist in vibrating the first layer of concrete. The second layer of concrete is poured with a thickness of 300mm, that is, when the concrete overflows the anchor pad, start vibrating. The pouring method is the same as the first layer. Start the attached vibrator and the pneumatic trolley vibrator to assist in vibrating the first layer of concrete. Vibrators and pneumatic trolley vibrators are used to assist in vibration, while inserted vibrators are used as the main vibration method for reinforcing the concrete at the embedded plates of the supports. When vibrating, the steel bars should be vibrated one by one to ensure that the concrete is vibrated densely. At the same time, attention should be paid to the vibration principles of the vibrators. When vibrating with inserted vibrators, the insert vibrators should be inserted quickly and pulled out slowly. The single-point vibration time should not exceed 35 seconds. The single vibration time of attached vibrators and pneumatic trolley vibrators should not exceed 25 seconds. After the second layer of concrete is poured, the formwork should be installed and the steel bar protection layer should be checked to see if it meets the design requirements.

[0051] Furthermore, the above-mentioned attached vibrator and pneumatic trolley vibrator should be no less than 50 mm away from the strip foundation of the beam-making pedestal, while the attached vibrator is close to the support and the pneumatic trolley vibrator is far away from the support.

[0052] Furthermore, the above-mentioned pasted gravel must be washed with water after screening to ensure that all stones are clean. The washed stones are dried in a dryer. The temperature during drying should not be too high, and the controlled temperature should not exceed 300°.

[0053] Furthermore, when laying the gravel, the surface of the gravel should not be covered by epoxy resin except for the part in contact with the bearing embedded plate.

[0054] The method for controlling the hollow noise of the embedded plate of the integrated support of the 40m box girder of the high-speed railway ensures that there is enough aggregate after the epoxy resin and crushed stone are laid above the embedded plate of the support. The pneumatic trolley vibrator and the attached vibrator are used to strengthen the vibration. The web template at the end of the beam is installed later to provide the inserted vibrator with construction operation space, so as to realize the precise positioning and vibration. The method can effectively control the hollow noise problem of the embedded plate of the integrated support of the prefabricated box girder, ensure the quality of the concrete pouring at the end of the beam, and improve the quality of the prefabricated box girder entity. The specific effects are reflected in the following aspects:

[0055] 1) Through a variety of auxiliary measures, the generation of bubbles and pitting on the beam end face, the bottom plate of the support, and the web can be effectively controlled to prevent the beam end face from being vibrated loosely due to the influence of the anchor hole and anchor basin, and the generation of bubbles and pitting on the bottom plate and web of the support due to the inadequate vibration of the inserted vibrator, thus ensuring the quality of concrete pouring in this area;

[0056] 2) It can effectively ensure the quality of concrete above the embedded plate of the bearing, control the amount of concrete aggregate above the embedded plate of the bearing, and prevent the phenomenon of insufficient aggregate caused by too dense bearing steel bars;

[0057] 3) By adding a pneumatic trolley vibrator to work in conjunction with the original attached vibrator, the probability of empty sound is reduced;

[0058] 4) Use 3 Φ16 steel bars to prevent some of the gravel from being crushed and ensure the quantity and quality of the gravel above the embedded plate of the bearing;

[0059] 5) The web formwork at the end of the beam is installed later to provide operation and visual space for the concrete vibration at the support, and the concrete above the embedded plate of the support can be accurately vibrated and the vibration condition can be observed.

[0060] Among them, when laying the above-mentioned gravel, gravel laying equipment is used for laying, such as Figure 2-9 As shown, the gravel paving equipment includes a gravel placing mechanism 1, a gravel pressing mechanism 2 and a support embedded plate placing platform 3, the gravel placing mechanism 1 and the gravel pressing mechanism 2 are both installed on a walking mechanism 4, the support embedded plate placing platform 3 is provided with a placing groove 5, the placing groove 5 is used to place the support embedded plate 6, the walking mechanism 4 is installed on one side of the support embedded plate placing platform 3 and the gravel placing mechanism 2 can place the gravel on the support embedded plate 6, the gravel pressing mechanism 2 can squeeze the placed gravel downward, the gravel paving equipment composed of the gravel placing mechanism, the gravel pressing mechanism and the support embedded plate placing platform can realize accurate paving of gravel, improve the quality of gravel paving, reduce the labor intensity, time and labor consuming problems caused by manual paving, and the paving and pressing are performed automatically with high efficiency.

[0061] In order to improve the speed and accuracy of gravel placement, the gravel placement mechanism 1 includes a first column 101, a linear motion module 102, a double-rod lifting cylinder 103, a storage hopper 104, a discharging mechanism 105 and a discharging nozzle 106. The lower end of the first column 101 is installed on the walking mechanism 4, one end of the linear motion module 102 is horizontally and vertically fixedly connected to the first column 101, the cylinder seat of the double-rod lifting cylinder 103 is fixedly connected to the slider 107 arranged on the front side of the linear motion module 102, the storage hopper 104 is installed on the cylinder seat of the double-rod lifting cylinder 103, and the discharging nozzle 106 is installed on the cylinder seat of the double-rod lifting cylinder 103. The material mechanism 105 is installed at the discharge port of the storage hopper 104 and is used to deliver the crushed stones one by one. The discharge nozzle 106 is vertically installed at the ends of the two cylinder rods of the double-rod lifting cylinder 103, and is connected to the discharge port of the storage hopper 104 through a hose 108. The use of columns, linear moving modules and lifting cylinders can achieve precise positioning of the discharge nozzle, and the gravel is laid accurately and evenly without overlapping or contact problems. The storage hopper is used to directly store the gravel and the discharge mechanism is used for discharging, which greatly improves the discharging efficiency, and the material is discharged by particle, and the feeding is accurate.

[0062] In order to simplify the discharging mechanism, the discharging mechanism 105 includes a discharging rotating disk 109, a swing rod 110, a return spring 111 and a connecting rope 112. The discharging rotating disk 109 is rotatably connected to the discharging port through a rotating shaft 113 and can block the discharging port. A feeding U-shaped groove 114 is provided on the discharging rotating disk 109. The feeding U-shaped groove 114 accommodates a gravel. The outer end of the rotating shaft 113 is fixedly connected to the swing plate 110. The upper side of the free end of the swing rod 110 is connected to the outer surface of the storage hopper 104 through a return spring 111. The lower side of the free end of the swing rod 110 is connected to the double rod 112 through a connecting rope The fixed rod 115 is vertically fixedly connected at the end of the cylinder rod of the lifting cylinder 103. When the cylinder rod is extended to the longest, the feeding U-shaped groove 114 can be rotated 150 degrees and a gravel can be sent from the inside of the storage hopper 104 to the hose 108. The three-dimensional laser scanner is used to identify the image of the gravel placement area for modeling and the threaded steel bars embedded in the support embedded plate. According to the established model of the position to be laid and the requirements for the gravel laying spacing, the linear module, the double-rod telescopic cylinder and the walking mechanism are controlled to carry out fast and accurate laying, thereby avoiding large errors caused by inaccurate positioning or manual alignment.

[0063] In order to automatically carry out modeling, a model basis is not provided for paving. The above-mentioned gravel paving equipment also includes a three-dimensional laser scanner 7. The three-dimensional laser scanner 7 is used to identify the image of the gravel placement area for modeling and the modeling of the threaded steel bars embedded in the support embedded plate. The three-dimensional laser scanner 7 is installed on the scanner bracket 8, and the scanner bracket 8 is installed on the walking mechanism 4. The scanner bracket 8 is located in front of the gravel placement mechanism 1. The three-dimensional laser scanner is used to identify the image of the gravel placement area for modeling and the modeling of the threaded steel bars embedded in the support embedded plate. According to the established model of the position to be laid and the gravel paving spacing requirements, the linear module, the double-rod telescopic cylinder and the walking mechanism are controlled to carry out fast and accurate paving, thereby avoiding large errors caused by inaccurate positioning or manual alignment.

[0064] In order to evaluate the quality of gravel paving, the above-mentioned gravel paving equipment also includes a camera 9, which is used to identify the quality inspection after the gravel is placed. The camera 9 is installed on the walking mechanism 4 through the camera bracket 10 and is located behind the gravel pressing mechanism 2. The camera is used to perform quality inspection on the laid gravel, such as the detection of gaps, overlaps and contacts of gravel. If gaps are judged, gravel is filled in. If gravel overlaps and contacts occur, manual correction is performed to ensure the quality of gravel paving.

[0065] In order to achieve fast and accurate position movement, the above-mentioned walking mechanism 4 includes a walking platform 401, a slider guide pair 402 and a ball screw nut pair 403. The walking platform 401 is connected to the ground through two slider guide pairs 402. The nut of the ball screw nut pair 403 is fixedly connected to the nut seat 404 at the bottom of the walking platform 401. Both ends of the screw of the ball screw nut pair 403 are connected to the ground through a bearing seat 407 and one end is extended and connected to a drive motor 405. The drive motor 405 is installed on the ground through a motor frame 406. The slider guide pair and the ball screw nut pair are used for directional walking support and drive, so that the walking is smooth, the position is accurate, and the movement is fast.

[0066] In order to realize rapid pressing of crushed stones, the crushed stone pressing mechanism 2 includes a pressing plate 201 and a pressing double-rod cylinder 202. The pressing plate 201 is provided with corresponding through holes avoiding the screws and steel bars on the embedded plate of the support. The cylinder rod end of the pressing double-rod cylinder 202 is fixedly connected to the upper end surface of the pressing plate 201. The cylinder seat of the pressing double-rod cylinder 202 is vertically fixedly connected to the cantilever frame 203. The cantilever frame 203 is installed on the walking mechanism 4. The bottom of the pressing plate 201 is provided with a high-density sponge layer 204, and the bottom of the high-density sponge layer 204 is provided with a receiving hole 20 5. An elastic pressing mechanism 206 is vertically installed in the accommodating hole 205. The elastic pressing mechanism 206 includes a pressing plate 207 and a spring 208. The pressing plate 207 is connected to the bottom surface of the pressing plate 201 through the spring 208. When in use, the cylinder rod of the double-rod cylinder is controlled to extend, and the pressing plate presses the gravel. Then, under the elastic action of the elastic pressing mechanism, the gravel of different heights can be effectively pressed into place, avoiding poor stability caused by inadequate pressing. The use of a high-density sponge layer can effectively play a role in pressing stability.

[0067] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A crushed stone paving device for a box girder support pre-embedded plate, comprising a crushed stone placing mechanism (1), a crushed stone pressing mechanism (2) and a support pre-embedded plate placing platform (3), wherein the crushed stone placing mechanism (1) and the crushed stone pressing mechanism (2) are both mounted on a walking mechanism (4), the support pre-embedded plate placing platform (3) is used to place the support pre-embedded plate (6), the walking mechanism (4) is mounted on one side of the support pre-embedded plate placing platform (3), and the crushed stone placing mechanism (2) can place the crushed stone on the support pre-embedded plate (6), and the crushed stone pressing mechanism (2) can press the placed crushed stone downward.

2. The crushed stone paving equipment for embedded plate of box beam support according to claim 1 is characterized by: The crushed stone placement mechanism (1) comprises a first column (101), a linear motion module (102), a double-rod lifting cylinder (103), a storage hopper (104), a discharging mechanism (105) and a discharging nozzle (106), wherein the lower end of the first column (101) is mounted on the walking mechanism (4), one end of the linear motion module (102) is horizontally and vertically fixedly connected to the first column (101), and the cylinder seat of the double-rod lifting cylinder (103) is fixedly connected to the linear motion module (102). The material storage hopper (104) is mounted on a slider (107) arranged on the front side of the linear moving module (102), the material storage hopper (104) is mounted on a cylinder seat of a double-rod lifting cylinder (103), a discharging mechanism (105) is mounted at the discharging port of the material storage hopper (104) and is used to deliver the crushed stones one by one, and a discharging nozzle (106) is vertically mounted at the ends of the two cylinder rods of the double-rod lifting cylinder (103), and is connected to the discharging port of the material storage hopper (104) through a hose (108).

3. The crushed stone paving equipment for embedded plate of box beam support according to claim 2 is characterized by: The discharging mechanism (105) comprises a discharging rotating disc (109), a swinging rod (110), a return spring (111) and a connecting rope (112). The discharging rotating disc (109) is rotatably connected to the discharging port via a rotating shaft (113) and can block the discharging port. A feeding U-shaped groove (114) is provided on the discharging rotating disc (109). The feeding U-shaped groove (114) accommodates a piece of crushed stone. The outer end of the rotating shaft (113) is fixedly connected to the swinging plate (110) and swings. The upper side of the free end of the rod (110) is connected to the outer surface of the storage hopper (104) through a return spring (111), and the lower side of the free end of the swing rod (110) is connected to a fixed rod (115) vertically fixedly connected to the end of the cylinder rod of the double-rod lifting cylinder (103) through a connecting rope (112). When the cylinder rod is extended to the longest, the feeding U-shaped groove (114) can be rotated 150 degrees and a piece of crushed stone can be sent from the inside of the storage hopper (104) to the hose (108).

4. The crushed stone paving equipment for embedded plate of box beam support according to claim 1 is characterized by: It also includes a three-dimensional laser scanner (7), which is used to identify the image of the gravel placement area for modeling and modeling the threaded steel bars embedded in the support embedded plate. The three-dimensional laser scanner (7) is installed on a scanner bracket (8), and the scanner bracket (8) is installed on the walking mechanism (4). The scanner bracket (8) is located in front of the gravel placement mechanism (1).

5. The crushed stone paving equipment for embedded plate of box girder support according to claim 1 is characterized by: It also includes a camera (9), which is used to identify the quality of the crushed stones after they are placed. The camera (9) is installed on the walking mechanism (4) through a camera bracket (10) and is located behind the crushed stone pressing mechanism (2).

6. The crushed stone paving equipment for embedded plate of box girder support according to claim 1 is characterized by: The crushed stone pressing mechanism (2) comprises a pressing plate (201) and a pressing double-rod cylinder (202); the pressing plate (201) is provided with corresponding through holes that avoid the screw rods and steel bars on the support embedded plate; the cylinder rod end of the pressing double-rod cylinder (202) is fixedly connected to the upper end surface of the pressing plate (201); the cylinder seat of the pressing double-rod cylinder (202) is vertically fixedly connected to the cantilever frame (203); the cantilever frame (203) is installed on the walking mechanism (4); a high-density sponge layer (204) is provided at the bottom of the pressing plate (201); a receiving hole (205) is provided at the bottom of the high-density sponge layer (204); an elastic pressing mechanism (206) is vertically installed in the receiving hole (205); the elastic pressing mechanism (206) comprises a pressing plate (207) and a spring (208); the pressing plate (207) is connected to the bottom surface of the pressing plate (201) via the spring (208).

7. The method for operating the crushed stone paving equipment for the embedded plate of the box beam support according to claim 1 is characterized by: The method is as follows: a three-dimensional laser scanner is used to identify the image of the gravel placement area for modeling and the modeling of the threaded steel bars embedded in the support embedded plate; according to the established model of the position to be laid and the requirements for the gravel laying spacing, the control parameters of the linear module, the double-rod telescopic cylinder and the walking mechanism are set; according to the control parameter settings, the gravel placement mechanism moves the gravel to be discharged onto the epoxy resin layer painted on the embedded plate; after the placement is completed, the gravel pressing mechanism is used to press; after the pressing is completed, the camera is used to collect data images; the gravel laying situation is captured according to the gravel laying image collected by the image; if the gravel is missing, the gravel placement mechanism is controlled to supplement the laying of the gravel at the point, and the gravel pressing mechanism is used to press again, and the image collection and comparison are re-performed until the design requirements are met and the gravel laying is completed.

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