In-situ mixing and grouting system and method for grouting of fabricated building joints

Abstract

The application provides a site mixing and grouting system and a grouting method for the grouting of a fabricated building joint, which comprises a primary mixing device and a secondary mixing and grouting device; the primary mixing device comprises a mixing barrel, a fixed support, a barrel cover, an upper mixer, a primary controller, a primary temperature sensor, a primary heating device, a discharge pipe, a primary grouting pipe, a primary grouting head and a primary discharge valve; the secondary mixing and grouting device comprises a grouting machine, a movable adjusting support, the grouting machine comprising a grouting barrel, a machine body, a transverse mixer, a secondary temperature sensor, a secondary heating device, a secondary grouting pipe, a secondary grouting head, a secondary discharge valve, a grouting opening and an additive box. The application can improve the preparation efficiency of the slurry, keep the mixing barrel, the grouting barrel and the slurry in the barrel warm, control the ambient temperature suitable for the grouting construction at the fabricated building joint, improve the speed, efficiency and grouting quality of the grouting construction, and shorten the construction period of the fabricated building.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, and in particular to an on-site mixing grouting system and grouting method for grouting joints in prefabricated buildings. Background Technology

[0002] For prefabricated building joints, grout is typically mixed on-site using a grouting machine and then applied to the rebar sleeve joints. Because on-site grouting requires completion within 30 minutes of mixing the grout, and the ambient temperature at the joint must be high and unaffected by seasonal changes, rain, or snow, otherwise the connection quality at the prefabricated building joint will be compromised, it is unsuitable to use concrete mixer trucks to transport grout from commercial batching plants over long distances to the rebar sleeve joints of prefabricated buildings for on-site grouting. Furthermore, the grout used for prefabricated building joints must have a higher grade than the concrete from the batching plant to ensure the connection strength; therefore, grout from commercial batching plants does not meet the grouting requirements for prefabricated building joints. Conventional grouting machines in this field only have the function of storing grout mixtures and lack mixing and insulation functions. Before grouting, the grout needs to be mixed using a separate mixing device within the grouting machine's container. After the grout in the container is measured by external temperature measuring equipment and meets the grouting temperature requirements, on-site grouting is performed at the rebar sleeve joints of the prefabricated building. Its disadvantages are that both mixing and temperature measurement require opening the grouting port inside the bucket, which is not only inconvenient to operate, but also causes the outside air temperature to enter the bucket through the grouting port, affecting the temperature of the grout. Prolonged mixing also affects the efficiency of grouting construction. Summary of the Invention

[0003] The purpose of this invention is to provide an on-site mixing grouting system and grouting method for grouting nodes in prefabricated buildings, so as to solve the problems of low grouting efficiency and inability to ensure that the grout in the bucket meets the grouting temperature requirements at the nodes of prefabricated buildings by traditional grouting machines.

[0004] To solve the above-mentioned technical problems, the present invention provides an on-site mixing grouting system for grouting nodes of prefabricated buildings, including a primary mixing device set up at the construction site, and a plurality of secondary mixing grouting devices set up around the primary mixing device, and also includes a grouting pavilion surrounding the prefabricated building node.

[0005] The primary mixing equipment is used for the first mixing of grout suitable for grouting nodes in prefabricated buildings; it includes a mixing tank and a fixed support below it, a tank cover is provided on the top of the mixing tank, an upper-mounted agitator extends downward into the mixing tank along the center of the tank cover, a primary controller is provided on the outer wall of the mixing tank, the primary controller is connected to a primary temperature sensor, a primary heating device and the upper-mounted agitator, the primary temperature sensor is located inside the mixing tank and / or on the tank cover, the primary heating device is located on the mixing tank, and multiple discharge pipes are evenly connected to the mixing tank, each discharge pipe is connected to a primary grouting pipe, the primary grouting pipe is connected to a primary grouting head, and a primary discharge valve is provided on the primary grouting head or the discharge pipe;

[0006] The secondary mixing grouting equipment is used to package the grout after the primary mixing equipment, and to mix the packaged grout a second time and move it to the prefabricated building node for on-site grouting; it includes a grouting machine and a movable adjustable support below it. The grouting machine includes a grouting tank and a connected machine body. A horizontal agitator is installed inside the grouting tank. The grouting controller of the grouting machine is connected to a secondary temperature sensor, a secondary heating device, and the horizontal agitator. The secondary temperature sensor is installed inside the grouting tank, and the secondary heating device is installed on the grouting tank. The machine body is connected to a secondary grouting pipe, and the secondary grouting pipe is connected to a secondary grouting head. A secondary discharge valve is installed at the outlet of the secondary grouting head or the machine body. The grouting tank is also equipped with a grouting port and an additive box. The primary grouting head is plugged into the grouting tank through the grouting port.

[0007] The grouting pavilion is a cubic enclosure with an open bottom. An air conditioner is installed on the grouting pavilion, which includes an indoor unit installed inside the grouting pavilion and an outdoor unit installed outside the grouting pavilion. The grouting pavilion is also equipped with an opening that can be opened.

[0008] Furthermore, the on-site mixing grouting system for prefabricated building node grouting provided by the present invention includes an upper-mounted mixer comprising an upper-mounted motor mounted on the bucket cover, a vertical mixing rod connected to the upper-mounted motor, and spiral blades arranged along the length direction of the vertical mixing rod.

[0009] Furthermore, the on-site mixing grouting system for prefabricated building node grouting provided by the present invention includes a horizontal mixer comprising a horizontal motor mounted on the grouting tank, a horizontal mixing rod connected to the horizontal motor, and mixing bars evenly distributed along the periphery of the horizontal mixing rod.

[0010] Furthermore, in the on-site mixing grouting system for prefabricated building joint grouting provided by the present invention, the discharge pipe is inclinedly connected and disposed at the junction of the side wall and bottom of the mixing tank; or the discharge pipe is connected and disposed on the bottom of the mixing tank.

[0011] Furthermore, the on-site mixing grouting system for prefabricated building node grouting provided by the present invention includes both the mixing tank and the grouting tank as insulated tanks. The insulated tank includes an outer layer, an insulation layer and an inner layer from the outside to the inside. The insulation layer includes at least the primary heating device that is spaced apart from the inner and outer layers, or includes insulation cotton that is in contact with the inner and outer layers and the primary heating device that is embedded in the insulation cotton and does not contact the inner and outer layers.

[0012] Furthermore, the on-site mixing grouting system for prefabricated building node grouting provided by the present invention includes a primary controller connected to a primary display screen and primary buttons; and / or the primary controller is also connected to a primary remote controller.

[0013] Furthermore, the on-site mixing grouting system for prefabricated building node grouting provided by the present invention includes a movable adjustable support comprising a mobile trolley, an adjustment platform located below the grouting bucket for mounting the grouting bucket, multiple adjustment rods disposed between the mobile trolley and the adjustment platform, and a limiting rod disposed on the adjustment platform for restricting the movement of the grouting bucket.

[0014] Furthermore, the on-site mixing grouting system for prefabricated building node grouting provided by the present invention includes a grouting controller connected to a secondary display screen and secondary buttons; and / or the grouting controller is also connected to a secondary remote controller.

[0015] Furthermore, the on-site mixing grouting system for prefabricated building nodes provided by the present invention also includes a grouting pavilion surrounding the prefabricated building node. The grouting pavilion is a cubic enclosure with an open bottom. An air conditioner is installed on the grouting pavilion. The air conditioner includes an indoor unit installed inside the grouting pavilion and an outdoor unit installed outside the grouting pavilion. The grouting pavilion is also provided with an opening that can be opened.

[0016] Compared with existing technologies, the on-site mixing grouting system for prefabricated building joint grouting provided by this invention has the following advantages:

[0017] The primary mixing equipment can distribute the mixed slurry into the secondary mixing and grouting equipment. The primary mixing equipment can then start mixing the second batch of slurry. At the same time, the secondary mixing and grouting equipment adds admixtures and mixes them again. After mixing, the grouting operation is carried out through the grouting machine of the secondary mixing and grouting equipment. This can improve the slurry preparation efficiency of prefabricated building nodes, increase the construction speed and efficiency of grouting of prefabricated building nodes, and shorten the construction cycle of prefabricated buildings.

[0018] Both the primary mixing equipment and the secondary mixing and grouting equipment are equipped with heating devices and temperature sensors, which can keep the barrel wall and the grout inside the barrel warm throughout the entire process from preparation to grouting output. This overcomes the influence of seasonal cold temperature changes on the barrel wall temperature, which in turn affects the temperature of the grout inside the barrel. It also avoids the problem of poor grouting quality or failure to discharge grout caused by the influence of seasonal cold temperature changes on the temperature of the grout inside the mixing barrel and grouting barrel.

[0019] To address the aforementioned technical problems, the present invention also provides a grouting method for prefabricated building joints, employing the aforementioned on-site mixing grouting system for prefabricated building joints, comprising:

[0020] The grouting pavilion is set up around the perimeter of the prefabricated building node, and the air conditioner on the grouting pavilion is turned on to control the ambient temperature of the prefabricated building node.

[0021] An on-site mixing grouting system for grouting prefabricated building nodes is installed at the construction site of the prefabricated building nodes.

[0022] According to the grouting amount of the prefabricated building nodes, the material and water are filled into the mixing tank of the primary mixing equipment. The primary controller controls the upper mixer to mix the slurry and water in the mixing tank to form slurry. When the slurry in the mixing tank reaches the predetermined mixing time and is mixed evenly, the mixing is stopped and left to stand for the predetermined time.

[0023] The temperature of the mixing tank wall is detected by the primary temperature sensor through the primary controller. When the temperature of the mixing tank wall detected by the primary temperature sensor is lower than the predetermined temperature value set by the primary controller, the primary controller controls the primary heating device to start, heats the tank wall to the predetermined temperature value, and then remains still for a predetermined time.

[0024] The primary grouting head of the primary mixing equipment is connected to the grouting tank through the grouting port of the secondary mixing grouting equipment. The primary discharge valve is opened, and the slurry in the mixing tank of the primary mixing equipment is distributed into the grouting tank of the secondary mixing grouting equipment through the discharge pipe, the primary grouting pipe and the primary grouting head.

[0025] Close the primary discharge valve and pull out the primary grouting head;

[0026] Additives are added to the grouting tank of the secondary mixing grouting equipment via an additive box.

[0027] The secondary mixing and grouting equipment is transported to the prefabricated building node via a movable and adjustable support.

[0028] During the transportation of the secondary mixing grouting equipment, the grouting controller of the secondary mixing grouting equipment controls the horizontal agitator to mix the grout with additives in the grouting tank; the grouting controller detects the tank wall temperature through the secondary temperature sensor. When the secondary temperature sensor detects that the tank wall temperature is lower than the preset temperature value set by the grouting controller, the grouting controller controls the secondary heating device to start, heating the tank wall to the preset temperature value and then letting it stand for a preset time.

[0029] Before the secondary mixing grouting equipment pours the prefabricated building node, a grouting pavilion is set up around the prefabricated building node, and the air conditioner on the grouting pavilion is turned on to control the ambient temperature of the prefabricated building node; the secondary mixing grouting equipment is located inside the grouting pavilion or outside the grouting pavilion. When the secondary mixing grouting equipment is located outside the grouting pavilion, the secondary grouting head extends into the grouting pavilion through the spigot and is aligned with the prefabricated building node.

[0030] Open the secondary discharge valve, and the grouting controller, according to the set flow rate and flow rate, directs the grout from the secondary mixing grouting equipment to the steel sleeve node of the prefabricated building through the secondary grouting head for timed grouting construction.

[0031] Compared with existing technologies, the grouting method for prefabricated building nodes provided by this invention possesses all the beneficial effects of the aforementioned on-site mixing grouting system for prefabricated building nodes. Furthermore, before grouting the prefabricated building nodes, a grouting pavilion is constructed, and the ambient temperature around the nodes is controlled by air conditioning within the pavilion. This ensures a suitable temperature for grouting at the nodes, and, combined with the insulation control of the grout within the primary and secondary mixing and grouting equipment, the grouting quality is improved. This avoids problems such as seasonal temperature changes, mixing tanks without insulation, and grouting tanks where the grout temperature is affected by external temperatures, leading to grout failure or poor grouting quality. In addition, the grouting pavilion also prevents the impact of rain, snow, seasonal temperature changes, and variations in construction conditions on the grouting quality of the prefabricated building nodes, overcoming the adverse conditions that prevent construction due to temperature and construction conditions, thus improving the project progress and construction efficiency of prefabricated buildings. Attached Figure Description

[0032] Figure 1 This is a structural schematic diagram of the on-site mixing and grouting system;

[0033] Figure 2 This is a schematic diagram of the structure of a primary mixing unit;

[0034] Figure 3 This is a structural schematic diagram of a two-stage mixing grouting equipment;

[0035] Figure 4 This is the control principle diagram of a primary mixing device;

[0036] Figure 5 This is the control principle diagram of a two-stage mixing grouting equipment;

[0037] Figure 6 This is a structural schematic diagram of the grouting pavilion;

[0038] Figure 7 This is a schematic diagram of the insulation layer of the mixing tank;

[0039] Figure 8 This is a schematic diagram of the insulation layer of the grouting tank;

[0040] Figure 9 This is a flowchart of a grouting method according to one embodiment;

[0041] As shown in the figure:

[0042] 10. On-site mixing and grouting system;

[0043] 100. Primary mixing equipment;

[0044] 101. Mixing tank; 101-1. Outer layer; 101-2. Insulation layer; 101-3. Inner layer; 102. Tank lid; 103. Top-mounted agitator; 103-1. Top-mounted motor; 103-2. Vertical stirring rod; 103-3. Spiral blade; 104. Primary controller; 105. Primary temperature sensor; 106. Primary heating device; 107. Discharge pipe; 108. Primary grouting pipe; 109. Primary grouting head; 110. Fixed bracket; 111. Outlet temperature sensor; 112. Primary button; 113. Primary display screen; 114. Primary remote control; 115. Primary discharge valve; 116. Primary insulation cotton.

[0045] 200. Two-stage mixing and grouting equipment;

[0046] 201. Grouting tank; 202. Machine body; 203. Horizontal agitator; 204. Grouting controller; 205. Secondary temperature sensor; 206. Secondary heating device; 207. Secondary grouting pipe; 208. Secondary grouting head; 209. Secondary discharge valve; 210. Movable adjustable bracket; 211. Mobile trolley; 212. Adjusting rod; 213. Adjusting platform; 214. Limiting rod; 215. Admixture box; 216. Grouting port; 217. Secondary button; 218. Secondary display screen; 219. Secondary remote control; 220. Secondary insulation cotton.

[0047] 300. Grouting Pavilion;

[0048] 301. Cubic enclosure; 302. Indoor unit; 303. Outdoor unit; 304. Socket. Detailed Implementation

[0049] The present invention will now be described in detail with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0050] Please refer to Figures 1 to 3 This invention provides an on-site mixing and grouting system 10 for grouting nodes in prefabricated buildings. It includes a primary mixing device 100 installed at the construction site and multiple secondary mixing and grouting devices 200 arranged around the primary mixing device 100. The secondary mixing and grouting devices 200 are lower in height than the primary mixing device 100. Four secondary mixing and grouting devices 200 can be arranged in a circular array around the primary mixing device 100, but the system is not limited to four or a circular array; a double-row arrangement is also possible to facilitate the transportation of the secondary mixing and grouting devices 200. A double-row arrangement does not occupy a large central area and does not affect the construction of other building nodes at the construction site.

[0051] Please refer to Figure 1 , Figure 2 and Figure 7A primary mixing device 100 is used for the first mixing of grout suitable for grouting joints in prefabricated buildings. It includes a mixing tank 101 and a fixed support 110 below it. A tank cover 102 is provided above the mixing tank 101. An upper-mounted agitator 103 extends downwards into the mixing tank 101 along the center of the tank cover 102. A primary controller 104 is provided on the outer wall of the mixing tank 101. The primary controller 104 is connected to a primary temperature sensor 105, a primary heating device 106, and a primary heating element. The top-mounted agitator 103 has a primary temperature sensor 105 installed inside the mixing tank 101 and / or on the tank cover 102. A primary heating device 106 is installed on the mixing tank 101. Multiple discharge pipes 107 are evenly connected to the mixing tank 101. Each discharge pipe 107 is connected to a primary grouting pipe 108. The primary grouting pipe 108 is connected to a primary grouting head 109. A primary discharge valve 115 is installed on the primary grouting head 109 or the discharge pipe 107. The mixing tank 101 is fixedly mounted on the fixed support 110. The primary temperature sensor 105 is not limited to one; multiple sensors can be mounted on the mixing tank 101. The primary heating device 106 can be a heating plate or heating coil installed inside the wall of the mixing tank 101. The primary heating device 106 is used to insulate the tank wall to ensure that the slurry inside is not affected by the external temperature. The heating plate or heating coil does not contact the tank wall. To achieve uniform heating, the primary heating device 106 can be installed inside the inner and bottom walls of the mixing tank 101. In other words, the mixing tank 101 is an insulated tank, which can include, from the outside to the inside, an outer layer 101-1, an insulation layer 101-2, and an inner layer 101-3. The insulation layer 101-2 includes at least the primary heating device 106 spaced apart from the inner and outer layers, or it can be primary insulation cotton 116 in contact with the inner and outer layers, and the primary heating device 106 embedded within the primary insulation cotton 116 and not in contact with the inner and outer layers. The discharge valve 115 can control whether the primary mixing equipment 100 discharges material.

[0052] Please refer to Figure 1 , Figure 3 and Figure 8A secondary mixing grouting device 200 is used to package the grout after mixing by the primary mixing device 100, and to mix the packaged grout a second time and move it to the prefabricated building node for on-site grouting. It includes a grouting machine and a movable adjustable support 210 below it. The grouting machine includes a grouting tank 201 and a connected body 202. A horizontally positioned mixer 203 is installed inside the grouting tank 201. The grouting controller 204 of the grouting machine is connected to a secondary temperature sensor 205, a secondary heating device 206, and the horizontally positioned mixer 203. The secondary temperature sensor 205 is installed inside the grouting tank 201, and the secondary heating device 206 is installed on the grouting tank 201. The machine body 202 is connected to a secondary grouting pipe 207, which is connected to a secondary grouting head 208. A secondary discharge valve 209 is installed at the outlet of the secondary grouting head 208 or the machine body 202. The grouting tank 201 is also equipped with a grouting port 216 and an additive box 215. The primary grouting head 109 is plugged into the grouting tank 201 through the grouting port 216. The secondary mixing grouting equipment 200 is an improvement on the existing grouting machine, which is equipped with a grouting controller 204. The figure shows an example where the bottom surfaces of the machine body 202 and the grouting tank 201 are not aligned, only to highlight the larger capacity of the grouting tank 201. However, the two can be aligned. Aligning the machine body 202 and the grouting tank 201 makes it easier to fix them on the movable adjustable bracket 210. The structure and positional arrangement of the secondary heating device 206 can be the same as that of the primary heating device 106, meaning that the grouting tank 201 can include an outer layer, an insulation layer, and an inner layer from the outside in. The insulation layer includes at least the secondary heating device 206 spaced apart from the inner and outer layers, or it can consist of secondary insulation cotton 220 in contact with the inner and outer layers, and the secondary heating device 206 embedded within the secondary insulation cotton 220 and not in contact with the inner and outer layers. Multiple secondary temperature sensors 205 can also be used. The secondary discharge valve 209 controls whether the secondary mixing grouting equipment 200 discharges grout. Multiple additive boxes 215 can be provided, each storing different external additives to avoid mixing.

[0053] When the primary and secondary heating devices do not have insulation, the heat is transmitted to the inner and outer layers of the barrel wall through heated air. When the primary and secondary heating devices have insulation, the insulation can evenly heat the inner and outer walls. To avoid adverse situations such as electric leakage and fire caused by excessive heating temperature, flame-retardant insulation or equivalent alternatives are preferred. For example, asbestos can be used as insulation. In addition, since the heating temperature is lower than the controlled ambient temperature, there will be no risk of fire due to excessive heating temperature.

[0054] Please refer to Figures 1 to 2To improve mixing efficiency and facilitate the filling of water and materials, this embodiment of the invention provides a field mixing and grouting system 10 for prefabricated building joint grouting. The upper-mounted mixer 103 includes an upper-mounted motor 103-1 mounted on the bucket cover 102, a vertical mixing rod 103-2 connected to the upper-mounted motor 103-1, and spiral blades 103-3 arranged along the length of the vertical mixing rod 103-2. The upper-mounted mixer 103, mounted on the bucket cover 102, does not affect the filling of water and materials into the mixing bucket 101, reducing the splashing problem that easily occurs with lower-mounted mixers during material filling, and improving the safety of material filling. The spiral blades 103-1 enhance the uniformity of slurry mixing.

[0055] Please refer to Figure 1 and Figure 3 To avoid interference with the secondary heating device 206 during mixing, the on-site mixing grouting system 10 for prefabricated building joint grouting provided in this embodiment of the invention includes a horizontal mixer 203 comprising a horizontal motor 203-1 mounted on the grouting tank 201, a horizontal mixing rod 203-2 connected to the horizontal motor 203-1, and mixing rods 203-3 evenly distributed along the periphery of the horizontal mixing rod 203-2. The horizontal mixer 203 is positioned between the side furthest from the machine body 202 and the side closest to the machine body 202, thus increasing the contact area between the horizontal mixing rod 203-2 and the mixing rods 203-3 with the grout, improving the uniform mixing effect. To further improve the uniform mixing effect, the mixing rods 203-3 can also be replaced with helical blades.

[0056] Please refer to Figures 1 to 2 To facilitate the discharge of grout from the primary mixing equipment 100 under gravity after it has come to rest, the on-site mixing and grouting system 10 for prefabricated building joint grouting provided in this embodiment of the invention has a discharge pipe 107 inclinedly connected at the junction of the side wall and bottom of the mixing tank 101. To reduce grout residue in the mixing tank 101, the discharge pipe 107 is connected to the bottom of the mixing tank 101 (not shown).

[0057] Please refer to Figure 2 In order to improve the slurry temperature at the outlet of the primary mixing equipment 100 and to monitor the heat loss of the slurry in the slurry outlet pipeline, the on-site mixing and grouting system 10 for grouting nodes of prefabricated buildings provided in this embodiment of the invention is equipped with an outlet temperature sensor 111 at the outlet end of the primary grouting head 109, and the outlet temperature sensor 111 is connected to the primary controller 104.

[0058] Please refer to Figure 4To control the primary mixing equipment 100, the on-site mixing and grouting system 10 for prefabricated building joint grouting provided in this embodiment of the invention includes a primary controller 104 connected to a primary display screen 113 and primary buttons 112. The mixing time, mixing speed, set time, and predetermined slurry temperature of the primary mixing equipment 100 are then set via the primary buttons 112 and the primary display screen 113. For convenient initial setting and adjustment of the primary mixing equipment 100, the primary controller 104 is also wirelessly connected to a primary remote controller 114, enabling the implementation of the above settings and other settings via the primary remote controller 114.

[0059] Please refer to Figure 5 To control the secondary mixing grouting equipment 200, the on-site mixing grouting system 10 for prefabricated building joint grouting provided in this embodiment of the invention includes a grouting controller 204 connected to a secondary display screen 218 and secondary buttons 217. The mixing time, mixing speed, set time, and predetermined grout temperature of the secondary mixing grouting equipment 200 are then set via the secondary buttons 217 and the secondary display screen 218. For convenient initial and adjustment settings of the secondary mixing grouting equipment 200, the grouting controller 204 is also wirelessly connected to a secondary remote controller 219, enabling the above settings and other adjustments to be made via the secondary remote controller 219. The display screen and buttons can be independent components or integrated into a single touchscreen.

[0060] Please refer to Figure 1 and Figure 3 To facilitate the movement and transportation of the secondary mixing grouting equipment 200, this embodiment of the invention provides an on-site mixing grouting system 10 for prefabricated building node grouting. The movable adjustable support 210 includes a mobile trolley 211, an adjustment platform 213 located below the grouting tank 201 for mounting the grouting tank 201, multiple adjusting rods 212 positioned between the mobile trolley 211 and the adjustment platform 213, and a limiting rod 214 mounted on the adjustment platform 213 to restrict the movement of the grouting tank 201. The adjusting rods 212 are connected to a grouting controller 204. The grouting controller 204 can adjust the tilt angle of the grouting machine by adjusting the height of the adjusting rods 212 at different positions to facilitate grout discharge. The limiting rod 214 provides safety protection for the grouting machine, preventing it from falling off due to mixing vibration or tilt adjustment. The adjusting rods 212 can be hydraulic rods, which provide stability during height adjustment.

[0061] Please refer to Figure 6To overcome the influence of ambient temperature on grouting quality, the on-site mixing grouting system 10 for prefabricated building node grouting provided in this embodiment of the invention further includes a grouting pavilion 300 surrounding the prefabricated building node. The grouting pavilion 300 is a cubic enclosure 301 with an open bottom. An air conditioner is installed on the grouting pavilion 300, including an indoor unit 302 inside the grouting pavilion 300 and an outdoor unit 303 outside the grouting pavilion 300. The grouting pavilion 300 also has an openable socket 304. For easy observation of the grouting process, the cubic enclosure 301 can be made of transparent materials such as plexiglass or PVC. The cubic enclosure 301 is not limited to a cylinder; it can also be a square column, etc. For convenient installation, the grouting pavilion 300 is assembled from multiple enclosure pieces.

[0062] Please refer to Figures 1 to 9 This invention also provides a grouting method for prefabricated building nodes, which uses the above-mentioned on-site mixing grouting system 10 for prefabricated building node grouting and may include the following steps:

[0063] Step 401: Surround the prefabricated building node with the grouting pavilion 300 and turn on the air conditioner on the grouting pavilion 300 to control the ambient temperature of the prefabricated building node.

[0064] Step 402: The on-site mixing grouting system 10 for grouting of prefabricated building nodes is set up at the construction site of the prefabricated building node.

[0065] Step 403: According to the grouting volume required for the prefabricated building nodes, fill the mixing tank 101 of the primary mixing equipment 100 with material and water. The primary controller 104 controls the upper-mounted mixer 103 to mix the slurry and water in the mixing tank 101 to form a slurry. When the slurry in the mixing tank 101 reaches the predetermined mixing time and is uniformly mixed, stop mixing and let it stand for the predetermined time. The material and water can be added and mixed in stages to improve the mixing effect. To avoid waste and ensure the grouting volume for the prefabricated building nodes, the slurry can be prepared based on 120% of the grouting volume. For example, water can be poured into the mixing tank 101 first, then about 70% of the material can be added and mixed for 1-2 minutes until roughly uniform. Then, the remaining material can be added and mixed for another 3-4 minutes until completely uniform. After uniform mixing, let it stand for about 2-3 minutes.

[0066] Step 404: The primary controller 104 monitors the temperature of the mixing tank 101 wall via the primary temperature sensor 105. When the temperature sensor 105 detects that the wall temperature of the mixing tank 101 is lower than the predetermined temperature value set by the primary controller 104, the primary controller 104 controls the primary heating device 106 to start, heating the wall of the mixing tank 101 to the predetermined temperature value, i.e., maintaining the temperature of the mixing tank 101 until it remains still for a predetermined time. During this time, air bubbles in the slurry are eliminated.

[0067] Step 405: Connect the primary grouting head 109 of the primary mixing equipment 100 to the grouting tank 201 through the grouting port 216 of the secondary mixing and grouting equipment 200. Open the primary discharge valve 115 and distribute the slurry in the mixing tank 101 of the primary mixing equipment 100 into the grouting tank 201 of the secondary mixing and grouting equipment 200 through the discharge pipe 107, the primary grouting pipe 108 and the primary grouting head 109.

[0068] Step 406: Close the primary discharge valve 115 and pull out the primary grouting head 109.

[0069] Step 407: Add admixtures to the grouting bucket 201 through additive box 215. In this embodiment, an accelerator and a retarder are added separately through two additive boxes 215. The retarder delays the cement hydration reaction, thereby extending the concrete's setting time, allowing the fresh concrete to maintain its plasticity for a longer period, facilitating pouring, improving construction efficiency, and without adversely affecting the later performance of the concrete. In summer concrete construction and large-volume concrete construction, adding a retarder not only delays the concrete's setting time but also slows down the heat generated by cement hydration, reducing construction accidents caused by temperature stress from hydration heat leading to concrete cracking. The retarder can, to a certain extent, control slump loss and concrete setting time, ensuring excellent workability and uniform, stable quality; without changing the concrete's workability, it can improve the mid-to-late-stage strength of the concrete and improve its durability to varying degrees. The main purposes of using retarders are threefold: first, to reduce the slump loss of concrete over time, allowing it to maintain its plasticity for a longer period; second, to delay the setting time of cement, postpone the peak temperature of concrete, and reduce the peak temperature; and third, to improve the workability of concrete, reduce the water-cement ratio, and improve its strength and durability. Accelerators, on the other hand, primarily accelerate cement hydration, promoting the development of early-stage concrete strength. Accelerators can be chloride-based, sulfate-based, carbonate-based, or composite accelerators. Especially in winter construction or emergency repair projects, the performance and proper application of accelerators directly affect the safety and lifespan of the entire project. When construction is carried out in summer above 38°C, 5-40 kg of retarder can be added to the pumping agent; in winter below 12°C, 9.32 kg-13.98 kg of accelerator can be added to improve the setting effect of the slurry.

[0070] Step 408: The secondary mixing and grouting equipment 200 is transported to the prefabricated building node via the movable adjustable support 210, specifically to the rebar sleeve node of the prefabricated building. The secondary mixing and grouting equipment 200 can be transported inside the grouting pavilion 300, and the secondary grouting head aligned with the prefabricated building node. Alternatively, the secondary mixing and grouting equipment 200 can be transported outside the grouting pavilion 300, and the secondary grouting head 208 can be inserted through the socket 304 on the grouting pavilion 300 and aligned with the prefabricated building node. When the preset position of the socket 304 does not meet the position requirements, an opening can be made on-site, or multiple sockets 304 can be installed on the grouting pavilion 300.

[0071] During the transportation of the secondary mixing grouting equipment 200, the grouting controller 204 of the secondary mixing grouting equipment 200 controls the horizontal mixer 203 to perform secondary mixing of the grout containing additives in the grouting tank 201. The grouting controller 204 detects the tank wall temperature of the grouting tank 201 through the secondary temperature sensor 205. When the secondary temperature sensor 205 detects that the tank wall temperature of the grouting tank 201 is lower than the predetermined temperature value set by the grouting controller 204, the grouting controller 204 controls the secondary heating device 206 to start, heating the tank wall of the grouting tank 201 to the predetermined temperature value, that is, to keep the grouting tank 201 warm. After mixing, it is allowed to stand for a predetermined time. The purpose of standing for the predetermined time is to remove air bubbles in the grout, preventing the void phenomenon caused by air bubbles during grouting, which would lead to a decrease in joint strength. After the grout from the secondary mixing grouting equipment 200 is mixed evenly and meets the temperature requirements, the grouting controller 204 can provide a countdown reminder for grouting in 30-minute intervals to prevent the grout from becoming less fluid and causing voids or poor compaction at the grouting nodes.

[0072] Step 409: Open the secondary discharge valve 209. The grouting controller 204, according to the set flow rate and volume, directs the grout from the secondary mixing grouting equipment through the secondary grouting head 208 to the steel sleeve joint of the prefabricated building for timed grouting. When the grout volume reaches approximately 60-70% of the joint's required volume, the grout flow rate can be adjusted through the secondary discharge valve 209, and the discharge flow rate can be controlled through the grouting controller 204 to prevent the grout flow rate from being too fast, which could lead to joint grouting failure.

[0073] Please refer to Figure 9 This invention also provides a grouting method for prefabricated building joints, which can be completed within 30 minutes from grout preparation to grouting construction, thus solving the impact of human operation errors on the progress and quality of concrete grouting construction joints.

[0074] This invention provides an on-site mixing grouting system 10 and grouting method for grouting nodes in prefabricated buildings. The primary mixing equipment 100 can distribute the mixed grout into the secondary mixing grouting equipment 200. The primary mixing equipment 100 can start mixing the second batch of grout. At the same time, the secondary mixing grouting equipment adds admixtures and performs secondary mixing. After mixing, the grouting operation is carried out by the grouting machine of the secondary mixing grouting equipment 200. This can improve the grout preparation efficiency of prefabricated building nodes, improve the construction speed and efficiency of grouting of prefabricated building nodes, and shorten the construction cycle of prefabricated buildings.

[0075] This invention provides an on-site mixing and grouting system 10 and grouting method for grouting nodes in prefabricated buildings. Both the primary mixing equipment 100 and the secondary mixing and grouting equipment 200 are equipped with heating devices and temperature sensors, which can keep the tank walls and the grout inside the tanks in a constant temperature range from preparation to grouting output. This avoids the problem of poor grouting quality or failure to discharge grout due to the influence of seasonal cold temperature changes on the temperature of the grout inside the mixing tank 101 and the grouting tank 201.

[0076] The grouting method for prefabricated building nodes provided in this embodiment of the invention has all the beneficial effects of the on-site mixing grouting system 10 for prefabricated building node grouting described above. Furthermore, before grouting the prefabricated building node, a grouting pavilion 300 is constructed, and the ambient temperature around the prefabricated building node is controlled by air conditioning within the grouting pavilion 300. This, combined with the temperature control of the grout in the primary mixing equipment 100 and the secondary mixing grouting equipment 200, improves the grouting quality of the prefabricated building node and avoids problems such as seasonal temperature changes, mixing tanks without insulation, and grouting tanks where the grout temperature is affected by external temperature, resulting in grout not being discharged or poor grouting quality. The grouting pavilion 300 also prevents the impact of rain, snow, seasonal temperature changes, and changes in construction conditions on the grouting quality and progress of the prefabricated building node, overcoming the adverse situations where construction is impossible due to temperature and construction conditions, and improving the project progress and construction efficiency of prefabricated buildings.

[0077] This invention provides an on-site mixing grouting system 10 and grouting method for grouting joints in prefabricated buildings. When the amount of grout remaining in the grouting tank 201 is low, the tilt angle of the adjusting platform 213 is adjusted by the adjusting rod 212 on the side away from the machine body 202 controlled by the grouting controller 204, so that the machine body 202 tilts downward to facilitate grout discharge and reduce the amount of grout residue in the grouting tank 201. There are at least four adjusting rods 212.

[0078] This invention provides an on-site mixing grouting system 10 and grouting method for grouting joints in prefabricated buildings. After the primary mixing equipment 100 distributes the mixed grout to the secondary mixing grouting equipment 200, the primary mixing equipment 100 can begin mixing and preparing the second batch of grout. Simultaneously, the secondary mixing grouting equipment 200 adds admixtures and performs secondary mixing. After secondary mixing, the grouting operation is performed on the prefabricated building joints using a grouting machine. The primary mixing equipment 100 and the secondary mixing grouting equipment 200 can operate simultaneously in a cycle, greatly improving the grout preparation efficiency and thus shortening the grouting cycle.

[0079] This invention provides an on-site mixing grouting system 10 and grouting method for grouting nodes in prefabricated buildings. The grout temperature of the primary mixing equipment 100 and the secondary mixing grouting equipment 200 can be controlled at a certain point or range of 10-20℃. The secondary mixing grouting equipment 200 can automatically complete grouting within 30 minutes, thereby improving the grouting quality of prefabricated building nodes and avoiding the problem of grouting failure caused by long-term grout storage.

[0080] This invention provides an on-site mixing grouting system 10 and grouting method for grouting nodes in prefabricated buildings. The primary mixing equipment 100 and the secondary mixing grouting equipment 200 both have functions such as mixing, heat preservation, and grout storage, which can ensure grouting construction under extremely cold and hot climate conditions.

[0081] To measure the grouting flow rate, this embodiment of the invention provides an on-site mixing grouting system 10 and a grouting method for grouting nodes in prefabricated buildings. A flow meter is installed on the secondary grouting head 208 of the secondary mixing grouting equipment 200, and the grouting controller 204 can measure the grouting flow rate through the flow meter.

[0082] This invention provides an on-site mixing grouting system 10 and grouting method for grouting nodes in prefabricated buildings. During the grout preparation process, the primary mixing equipment 100 and the secondary mixing grouting equipment 200 adjust and set the grout temperature for the prefabricated building nodes according to the seasonal temperature. According to concrete grouting standards, the grouting temperature in spring, autumn and summer should not exceed 25℃, and in winter it should not be lower than 5℃. On sunny days in summer, the grout temperature is set at 15℃, not exceeding 25℃ and not lower than 5℃. The grout temperature is monitored in real time by a temperature sensor, and the grout temperature can be controlled within ±5℃ to allow grouting under all weather conditions. The grouting temperature is maintained between 20-10℃ in all seasons, and the construction standards achieved are higher than those of conventional construction.

[0083] This invention provides an on-site mixing grouting system 10 and grouting method for grouting nodes in prefabricated buildings. After grouting of the nodes in prefabricated buildings is completed, the grouting pavilion 300 can be used to cure the grouting nodes, so as to overcome the situation where the grouting cannot reach the curing standard due to the ambient temperature.

[0084] This invention is not limited to the specific embodiments described above. Obviously, the embodiments described above are only a part of the embodiments of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of this invention are within the scope of protection of this invention. Those skilled in the art can make other modifications and variations to this invention. Therefore, if these modifications and variations of this invention fall within the scope of the claims of this invention, then this invention also intends to include these modifications and variations.

Claims

1. A field mixing grouting system for grouting joints in prefabricated buildings, characterized in that, It includes a primary mixing equipment set up at the construction site, and multiple secondary mixing and grouting equipment set up around the primary mixing equipment, as well as a grouting pavilion surrounding the prefabricated building nodes; The primary mixing equipment is used for the first mixing of grout suitable for grouting nodes in prefabricated buildings; it includes a mixing tank and a fixed support below it, a tank cover is provided on the top of the mixing tank, an upper-mounted agitator extends downward into the mixing tank along the center of the tank cover, a primary controller is provided on the outer wall of the mixing tank, the primary controller is connected to a primary temperature sensor, a primary heating device and the upper-mounted agitator, the primary temperature sensor is located inside the mixing tank and / or on the tank cover, the primary heating device is located on the mixing tank, and multiple discharge pipes are evenly connected to the mixing tank, each discharge pipe is connected to a primary grouting pipe, the primary grouting pipe is connected to a primary grouting head, and a primary discharge valve is provided on the primary grouting head or the discharge pipe; The secondary mixing grouting equipment is used to package the grout after the primary mixing equipment, and to mix the packaged grout a second time and move it to the prefabricated building node for on-site grouting; it includes a grouting machine and a movable adjustable support below it. The grouting machine includes a grouting tank and a connected machine body. A horizontal agitator is installed inside the grouting tank. The grouting controller of the grouting machine is connected to a secondary temperature sensor, a secondary heating device, and the horizontal agitator. The secondary temperature sensor is installed inside the grouting tank, and the secondary heating device is installed on the grouting tank. The machine body is connected to a secondary grouting pipe, and the secondary grouting pipe is connected to a secondary grouting head. A secondary discharge valve is installed at the outlet of the secondary grouting head or the machine body. The grouting tank is also equipped with a grouting port and an additive box. The primary grouting head is plugged into the grouting tank through the grouting port. The grouting pavilion is a cubic enclosure with an open bottom. An air conditioner is installed on the grouting pavilion, which includes an indoor unit installed inside the grouting pavilion and an outdoor unit installed outside the grouting pavilion. The grouting pavilion is also equipped with an opening that can be opened.

2. The on-site mixing grouting system for prefabricated building joint grouting according to claim 1, characterized in that, The top-mounted agitator includes a top-mounted motor mounted on the bucket lid, a vertical stirring rod connected to the top-mounted motor, and spiral blades arranged along the length of the vertical stirring rod.

3. The on-site mixing grouting system for prefabricated building joint grouting according to claim 1, characterized in that, The horizontal agitator includes a horizontal motor mounted on the grouting tank, a horizontal stirring rod connected to the horizontal motor, and stirring bars evenly distributed along the periphery of the horizontal stirring rod.

4. The on-site mixing grouting system for prefabricated building joint grouting according to claim 1, characterized in that, The discharge pipe is inclined and connected at the junction of the side wall and the bottom of the mixing tank; or the discharge pipe is connected and connected to the bottom of the mixing tank.

5. The on-site mixing grouting system for prefabricated building joint grouting according to claim 1, characterized in that, Both the mixing tank and the grouting tank are insulated tanks. The insulated tank includes an outer layer, an insulation layer and an inner layer from the outside to the inside. The insulation layer includes at least the primary heating device that is spaced apart from the inner and outer layers, or it includes insulation cotton that is in contact with the inner and outer layers and the primary heating device that is embedded in the insulation cotton and is not in contact with the inner and outer layers.

6. The on-site mixing grouting system for prefabricated building joint grouting according to claim 1, characterized in that, The primary controller is also connected to a primary display screen and primary buttons; and / or the primary controller is also connected to a primary remote control.

7. The on-site mixing grouting system for prefabricated building joint grouting according to claim 1, characterized in that, The movable adjustable support includes a mobile trolley, an adjustment platform located below the grouting bucket for mounting the grouting bucket, multiple adjustment rods disposed between the mobile trolley and the adjustment platform, and a limiting rod disposed on the adjustment platform for restricting the movement of the grouting bucket; the adjustment rods are connected to a grouting controller, which is used to adjust the height of the adjustment rods at different positions and adjust the tilt angle of the grouting machine.

8. The on-site mixing grouting system for prefabricated building joint grouting according to claim 1, characterized in that, The grouting controller is also connected to a secondary display screen and secondary buttons; and / or the grouting controller is also connected to a secondary remote control.

9. A grouting method for joints in prefabricated buildings, characterized in that, The on-site mixing grouting system for prefabricated building joint grouting as described in claim 1 includes: The grouting pavilion is set up around the perimeter of the prefabricated building node, and the air conditioner on the grouting pavilion is turned on to control the ambient temperature of the prefabricated building node. An on-site mixing grouting system for grouting prefabricated building nodes is installed at the construction site of the prefabricated building nodes. According to the grouting amount of the prefabricated building nodes, the material and water are filled into the mixing tank of the primary mixing equipment. The primary controller controls the upper mixer to mix the slurry and water in the mixing tank to form slurry. When the slurry in the mixing tank reaches the predetermined mixing time and is mixed evenly, the mixing is stopped and left to stand for the predetermined time. The temperature of the mixing tank wall is detected by the primary temperature sensor through the primary controller. When the temperature of the mixing tank wall detected by the primary temperature sensor is lower than the preset temperature value set by the primary controller, the primary controller controls the primary heating device to start, heats the tank wall to the preset temperature value, and then remains still for a preset time. The primary grouting head of the primary mixing equipment is connected to the grouting tank through the grouting port of the secondary mixing grouting equipment. The primary discharge valve is opened, and the slurry in the mixing tank of the primary mixing equipment is distributed into the grouting tank of the secondary mixing grouting equipment through the discharge pipe, the primary grouting pipe and the primary grouting head. Close the primary discharge valve and pull out the primary grouting head; Additives are added to the grouting tank of the secondary mixing grouting equipment via an additive box. The secondary mixing grouting equipment is transported to the prefabricated building node via a movable adjustable support. During the transportation of the secondary mixing grouting equipment, the grouting controller of the secondary mixing grouting equipment controls the horizontal agitator to mix the grout with additives in the grouting tank. The grouting controller detects the tank wall temperature through a secondary temperature sensor. When the secondary temperature sensor detects that the tank wall temperature is lower than the preset temperature value set by the grouting controller, the grouting controller controls the secondary heating device to start, heating the tank wall to the preset temperature value and then allowing it to stand for a preset time. Open the secondary discharge valve, and the grouting controller, according to the set flow rate and flow rate, directs the grout from the secondary mixing grouting equipment to the steel sleeve node of the prefabricated building through the secondary grouting head for timed grouting construction.

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