Pressure-maintaining grouting mechanism of concrete precast wall grouting sleeve

Abstract

This invention provides a pressure-holding grouting mechanism for a grouting sleeve in a precast concrete wall, relating to the field of precast concrete walls. It includes a lower precast concrete wall and an upper precast concrete wall; and further includes: a grouting sleeve, in which upper and lower reinforcing bar segments are respectively provided inside the upper and lower precast concrete walls, the grouting sleeve being fixedly fitted to the bottom end of the upper reinforcing bar segment, and the top end of the lower reinforcing bar segment extending into the grouting sleeve; a pressure-holding chamber, connected to a side frame, the side frame being detachably installed to the outer wall of the upper precast concrete wall via an installation mechanism, a discharge pipe being fixedly connected to one side of the bottom of the pressure-holding chamber, and a telescopic pipe being connected to the bottom end of the discharge pipe; a sealing part, disposed inside the discharge pipe, and the gap between the sealing part and the inner wall of the discharge pipe being adjustable; and a dragging mechanism for moving the sealing part within the discharge pipe. The installation mechanism facilitates easy assembly and disassembly on the upper precast concrete wall, allowing the entire assembly to be reused.

Description

Technical Field

[0001] This invention relates to the field of precast concrete walls, and particularly to a pressure-maintaining grouting mechanism for a grouting sleeve in precast concrete walls. Background Technology

[0002] Precast concrete walls are cast-in-place concrete wall panels produced in a factory; when connecting two walls, grouting sleeves are used to achieve the connection through grouting.

[0003] For example, existing patent document "CN218933611U A pressure-holding grouting mechanism for a grouting sleeve of a precast concrete wall" provides pressure for grouting by setting a pressure-holding chamber inside the precast concrete wall and using the height of the pressure-holding chamber and the weight of the grout inside it; another example is existing patent document "CN202220444U Screw pressure grouting machine The motor drives the screw assembly to rotate through a gearbox. The machine body cavity is completely sealed. When the screw assembly rotates, air is expelled, creating a vacuum inside the cavity, which draws in cement slurry. The slurry is then discharged from the outlet and directly fed into the pressure tank, from where it is discharged through the outlet. The effect of this scheme is: smooth and pulse-free slurry discharge, continuous pressure into the pressure tank, achieving stable pressure, pressure holding, pressure stabilization, and continuous slurry discharge. However, the pressure-holding grouting mechanism in the above-mentioned existing technology is located inside the precast wall, making it impossible to remove after use and lacking a reusable design, thus resulting in waste. At the same time, the remaining material in the pressure-holding chamber and the grouting sleeve lacks recovery and is difficult to recover and discharge. Summary of the Invention

[0004] In order to solve the technical problems of lack of disassembly design, inability to reuse, and difficulty in recycling internal materials, this invention provides a pressure-holding grouting mechanism for grouting sleeves of precast concrete walls.

[0005] The present invention solves the above-mentioned technical problems through the following technical solutions:

[0006] This invention first provides a pressure-maintaining grouting mechanism for a grouting sleeve of a precast concrete wall, comprising a lower precast concrete wall and an upper precast concrete wall; it further comprises: a grouting sleeve, wherein an upper reinforcing bar segment and a lower reinforcing bar segment are respectively provided inside the upper precast concrete wall and the lower precast concrete wall, the grouting sleeve is fixedly sleeved to the bottom end of the upper reinforcing bar segment, and the top end of the lower reinforcing bar segment extends into the grouting sleeve; the grouting sleeve is provided with an upper opening and a lower opening, both of which extend outside the upper precast concrete wall, and the lower... The opening is connected to a connecting pipe; a pressure-holding chamber, which is connected to a side frame. The side frame is detachably installed on the outer wall of the upper precast concrete wall via an installation mechanism. A discharge pipe is fixedly connected to one side of the bottom of the pressure-holding chamber. The bottom end of the discharge pipe is connected to a telescopic pipe that can be pulled out or inserted from the connecting pipe port; a sealing part, which is located inside the discharge pipe, and the gap between the sealing part and the inner wall of the discharge pipe is adjustable; and a dragging mechanism, which is used to move the sealing part inside the discharge pipe and is installed on the side frame.

[0007] In this technical solution, the installation mechanism allows for easy assembly and disassembly on the precast concrete wall, making the whole unit reusable and avoiding waste. After use, the dragging mechanism can pull the sealing part to push the residual material in the discharge pipe back into the pressure chamber, facilitating centralized discharge through the pressure chamber.

[0008] Preferably, there are two side frames, the pressure holding chamber is rotatably installed between the two side frames, and a connecting strip is fixedly installed between the two side frames; the top of the pressure holding chamber is open, the bottom of the pressure holding chamber is inclined to the horizontal plane, and a discharge port is provided on the bottom side of the pressure holding chamber away from the discharge pipe, and a valve is installed on the discharge port.

[0009] In this technical solution, the pressure chamber is rotatable and adjustable, and the bottom is inclined, which facilitates the flow of materials into the discharge port or feed pipe.

[0010] Preferably, it further includes a drive mechanism, which includes a fixed housing fixedly mounted on the side frame and a motor fixedly mounted on one side of the fixed housing. A worm gear is rotatably mounted inside the fixed housing. One end of the worm gear is fixedly connected to the output shaft end of the motor. The worm gear is meshed with a worm wheel. A first rotating shaft is fixedly mounted in the middle of the worm wheel. The first rotating shaft is rotatably connected to the side frame and fixedly connected to the pressure chamber.

[0011] In this technical solution, the drive mechanism is used to drive the pressure holding chamber to rotate and adjust the angle.

[0012] Preferably, it further includes a transmission mechanism; the transmission mechanism includes a fixed gear ring, a gear, a first transmission wheel, and a second transmission wheel; the fixed gear ring is fixedly connected to the side frame and is coaxially arranged with the first rotating shaft; the gear meshes with the fixed gear ring; a second rotating shaft is fixedly installed in the middle of the gear and is rotatably connected to the outer wall of the pressure chamber; the first transmission wheel is fixedly sleeved on the second rotating shaft; and a transmission belt is wound between the first transmission wheel and the second transmission wheel.

[0013] In this technical solution, the transmission mechanism uses the power provided by the rotation of the pressure chamber to drive the dragging mechanism.

[0014] Preferably, the dragging mechanism includes a take-up reel, a guide wheel, and a pull rope; the take-up reel is connected to a second drive wheel, one end of the pull rope is fixedly connected to the take-up reel, a mounting bracket is fixedly connected to the top of the pressure-holding chamber, the guide wheel is rotatably connected to the mounting bracket, the pull rope passes around the guide wheel, and the end of the pull rope away from the take-up reel is connected to the sealing part.

[0015] In this technical solution, the dragging mechanism is used to drag the sealing part so that it enters from the bottom end of the feed pipe to the top end.

[0016] Preferably, it further includes an air injection / venting mechanism; the air injection / venting mechanism includes a pipe body, a cylinder body, and a second screw; the pipe body is rotatably connected to the side frame, and the pipe body is fixedly connected to the second transmission wheel and the winding wheel, the pipe body, the second transmission wheel, and the winding wheel are coaxially arranged, the cylinder body is fixedly connected to the end of the pipe body, and a piston is fitted inside the cylinder body, the inner wall of the cylinder body and the side wall of the piston form a cavity, the pipe body communicates with the cavity, the second screw is rotatably connected to the side frame, and a rotating disk is fixedly installed at the end of the second screw, a nut is threaded onto the second screw, a connecting frame is fixedly connected to the nut, a connecting shaft is rotatably connected to the connecting frame, and the connecting shaft is fixedly connected to the piston.

[0017] In this technical solution, the gas injection and venting mechanism is used to inject or vent gas into the sealing part, thereby causing it to expand or contract.

[0018] Preferably, the pull rope and the sealing part are a flexible hose and a soft ball, respectively, and the inside of the winding wheel is provided with a cavity communicating with the tube body. The cavity is connected to the soft ball through the flexible hose.

[0019] Preferably, the installation mechanism includes a plug-in column and a movable plate; the plug-in column is fixedly connected to the side frame near the upper precast concrete wall, a groove is formed in the middle of the plug-in column, a movable column is slidably connected to the groove, the movable column is fixedly connected to the movable plate, a sliding groove is formed on the side frame, the movable plate is slidably connected to the sliding groove, a first spring is installed between the movable plate and the side frame, a pressure block is provided in the groove, the pressure block is fixedly connected to the movable column through a connecting rod, the cross-section of the pressure block is an isosceles trapezoidal structure, and the two sides of the pressure block respectively abut against... A positioning post is provided, which is slidably connected to guide holes on both sides of the insertion post. A groove is provided on the wall of the guide hole, and a second spring is provided in the groove. A connecting block is fixedly connected to the positioning post, and the connecting block is connected to the second spring. A pressure rod is fixedly connected to the movable plate, and the end of the pressure rod away from the movable plate is bent downward. An installation groove is provided on the upper precast concrete wall, and an installation sleeve for insertion of the insertion post is fixedly installed in the installation groove. A positioning groove for insertion of the positioning post is provided on the inner wall of the installation sleeve.

[0020] In this technical solution, the installation mechanism is used to install on the upper precast concrete wall.

[0021] Preferably, the driving mechanism further includes a fixed cylinder, a movable rod, and a first screw; the fixed cylinder is fixedly connected to the outer wall of the fixed shell, a fixed seat is fixedly installed on the outer wall of the fixed cylinder, and the fixed seat is fixedly connected to the side frame; the movable rod is clearance-fitted to the fixed cylinder; a guide bar is fixedly installed on the inner wall of the fixed cylinder; a guide groove is formed on the movable rod; the guide bar is slidably connected to the guide groove; a screw hole is formed along the length direction of the movable rod; the first screw is threadedly connected to the screw hole; one end of the first screw is fixedly connected to the worm gear; and a push bar aligned with the bent part of the pressure rod is fixedly connected to the end of the movable rod.

[0022] In this technical solution, the drive mechanism uses a drive push bar to pull the pressure rod, providing automatic release positioning for the installation mechanism.

[0023] Preferably, the telescopic tube includes an end plate; the end plate is fixedly connected to the bottom end of the feed tube, the feed tube is connected to the connector through a corrugated hose, a third spring is installed between the connector and the end plate, a connecting seat is fixedly connected to the bottom of the connector, a pull rod is fixedly connected to the connecting seat, a guide seat is fixedly connected to the bottom of the end plate, the pull rod is clearance-fitted with a hole opened on the guide seat, and a pull head is provided at the end of the pull rod away from the connecting seat.

[0024] In this technical solution, the telescopic tube can be inserted into or pulled out of the connecting pipe through its telescopic action.

[0025] This invention also provides a method for installing and using a pressure-maintaining grouting mechanism for a precast concrete wall grouting sleeve, the specific steps of which are as follows:

[0026] The motor drives the worm gear to rotate, and the meshing between the worm gear and the worm wheel causes the first shaft to rotate. The first shaft then drives the pressure chamber to rotate, achieving adjustment. When material is being discharged into the feed pipe, the sealing part is located at the bottom of the feed pipe. As the pressure chamber is adjusted to tilt towards the discharge port, it rotates, causing the gears to move on their teeth. This causes the gears, the second shaft, and the first drive wheel to rotate together. Through the transmission of the first drive wheel, the drive belt, and the second drive wheel, the winding wheel rotates, winding up the pull rope. This pull rope moves the sealing part from the bottom to the top of the feed pipe, facilitating the collection and pushing of any remaining material in the feed pipe into the pressure chamber during adjustment. When the pressure chamber is adjusted to tilt towards the feed pipe, it rotates in the opposite direction. Through the aforementioned transmission, the winding wheel unwinds the pull rope, and the pressure from the material in the pressure chamber forces the sealing part back to the bottom of the feed pipe. When the pressure-holding chamber is adjusted to tilt towards the discharge port, the grouting in the grouting sleeve is finished. The remaining grout is then discharged from the discharge port by opening the valve.

[0027] Preferably, the operation steps of the air injection and venting mechanism are as follows: When the feed pipe is opened to allow material to enter the grouting sleeve, the sealing part contracts. Specifically, by rotating the rotating disk in the forward direction, the second screw rotates, and the second screw and nut are screwed together. The nut pulls the connecting shaft through the connecting bracket, and the connecting shaft pulls the piston, increasing the volume of the cavity formed by the piston and the inner wall of the cylinder. This allows gas in the sealing part to enter the cavity through the cavity in the hose and the winding wheel, causing the sealing part to contract. This process brings the piston flush with the end face of the cylinder, completing the unsealing operation. When the feed pipe is closed, by rotating the rotating disk in the reverse direction, the piston returns to its original position through the above transmission. The piston fits against the inner wall of the connection end between the cylinder and the pipe, pushing the gas in the cavity into the sealing part. The sealing part expands, sealing the feed pipe. When the feed pipe discharges material into the grouting sleeve, the sealing of the feed pipe is released; in other states, sealing and closure are performed.

[0028] Preferably, during the process of adjusting the pressure chamber from tilting downwards towards the discharge port to tilting downwards towards the material pipe, the worm gear in the drive mechanism drives the first screw to rotate. The first screw is screwed into the screw hole, and guided by the guide bar and guide groove, the movable rod drives the push bar to approach the bent part of the pressure rod. The push bar pushes the pressure rod, which drives the movable plate to move. The movable plate drives the movable column, connecting rod, and pressure block to move, while stretching the first spring. As shown in the figure, the width of the pressure block gradually decreases in the direction away from the connecting rod. After the above movement, the positioning column moves by the elastic force of the second spring. The positioning column always abuts against the pressure block. The positioning column is pulled out of the positioning groove, and the positioning is canceled.

[0029] Preferably, the device of the present invention can be reused after disassembly. The steps are as follows: When connecting the next precast concrete wall and the previous precast concrete wall, material is loaded into the pressure chamber. By inserting the plug-in column into the mounting sleeve, the motor in the drive mechanism drives the worm gear to rotate in the opposite direction, causing the movable rod and push bar to reset. The elastic force of the first spring causes the movable plate to reset. The movable plate drives the movable column, connecting rod and pressure block to reset. The pressure block pushes the movable column into the positioning groove for positioning. At the same time, during the above positioning process, the pressure chamber is adjusted to tilt downwards towards the material pipe, and the dragging mechanism unwinds the pull rope.

[0030] Preferably, the telescopic pipe and the connecting pipe are connected or separated by the following steps: before rotating and adjusting the pressure chamber, the telescopic pipe and the connecting pipe are separated to avoid connection between them, which would affect the rotation and adjustment. Before adjusting the pressure chamber to tilt towards the downward feed pipe and injecting grout into the grouting sleeve through the feed pipe, the telescopic pipe and the connecting pipe are connected.

[0031] Preferably, the telescopic tube operates as follows: by pulling the pull head, the pull rod moves the connecting seat or joint together, pulling the joint out of the connecting pipe. At the same time, the third spring is compressed, and the magnetic block contacts the guide seat to magnetically attract it, thus maintaining the retracted state, i.e., separating it from the connecting pipe. By pushing the pull head, the magnetic block separates from the guide seat, and the elastic force of the third spring allows the joint to enter the connecting pipe for connection.

[0032] Preferably, the connection steps between the upper and lower precast concrete walls are as follows: material is discharged from the discharge pipe, the material enters the lower opening through the telescopic pipe, and then enters the grouting sleeve. The material in the grouting sleeve can enter the rubber frame between the upper and lower precast concrete walls; grouting is performed until the material flows out of the upper opening, thus completing the connection.

[0033] The positive and progressive effects of this invention are as follows:

[0034] 1. By setting up the installation mechanism, the entire structure can be removed from the precast concrete wall after use, thus making the entire structure reusable and avoiding waste;

[0035] 2. A sealing part is installed inside the feeding pipe, and the gap between the sealing part and the inner wall of the feeding pipe is adjustable, so that the opening and closing of the feeding pipe can be controlled. When grouting is required, the gap between the sealing part and the inner wall of the feeding pipe can be adjusted to the maximum. When grouting is not required, the sealing part is sealed to the inside of the feeding pipe.

[0036] 3. A dragging mechanism is also provided. After the overall structure is used, the sealing part can be moved from the bottom to the top of the feeding pipe by the dragging mechanism, which can push the residual material in the feeding pipe back into the pressure chamber, thus solving the problem that the residual material in the feeding pipe is not easy to be discharged and recycled.

[0037] 4. The pressure-holding chamber is rotatable and adjustable, with an inclined bottom, facilitating the switching of material flow direction between the discharge port and the feed pipe. The drive mechanism rotates the pressure-holding chamber and adjusts its angle. The transmission mechanism uses the power provided by the rotation of the pressure-holding chamber to operate the dragging mechanism. The gas injection / exhaust mechanism injects or expels gas into the sealing section, causing expansion or contraction. The dragging mechanism drags the sealing section from the bottom to the top of the feed pipe.

[0038] 5. Corresponding installation and positioning mechanisms and other auxiliary mechanisms are used to assist in installation and disassembly, which greatly simplifies the installation operation and improves the convenience and safety of construction. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0040] Figure 2 This is a side view of the pressure holding chamber, the feeding pipe, and the side frame of the present invention.

[0041] Figure 3 This is a schematic diagram of the side frame, mounting mechanism, dragging mechanism, and transmission mechanism of the present invention.

[0042] Figure 4 This is a schematic diagram of the dragging mechanism and the feeding tube of the present invention.

[0043] Figure 5 For the present invention Figure 4 Enlarged structural diagram of section A in the middle.

[0044] Figure 6 This is a schematic diagram of the transmission mechanism and dragging mechanism of the present invention.

[0045] Figure 7 This is a schematic diagram of the structure of the winding wheel and the air injection / venting mechanism of the present invention.

[0046] Figure 8 This is a schematic diagram of the telescopic tube of the present invention.

[0047] Figure 9 This is a schematic diagram of the drive mechanism and mounting mechanism of the present invention.

[0048] Figure 10 This is a schematic diagram of the internal structure of the fixed cylinder of the present invention.

[0049] Figure 11 This is a schematic diagram of the installation mechanism of the present invention.

[0050] Figure 12 For the present invention Figure 11 Enlarged structural diagram of section B in the middle.

[0051] Figure 13This is a schematic diagram of the structure of the grouting sleeve of the present invention inside the lower and upper precast concrete walls.

[0052] Explanation of reference numerals in the attached figures

[0053] 1. Lower precast concrete wall; 101. Lower reinforcing steel section;

[0054] 2. Install precast concrete wall; 201. Installation groove; 202. Installation sleeve; 2021. Positioning groove; 203. Install reinforcing bar segment;

[0055] 3. Rubber frame;

[0056] 4. Grouting sleeve; 401, top opening; 402, bottom opening; 403, connecting pipe;

[0057] 5. Pressure holding chamber; 501. Discharge port; 502. Valve;

[0058] 6. Side frame; 601. Connecting bar; 602. Slide groove;

[0059] 7. Mounting mechanism; 701, Insertion pin; 7011, Guide hole; 7012, Groove; 702, Movable plate; 7021, Pressure rod; 703, Movable column; 704, First spring; 705, Connecting rod; 706, Pressure block; 707, Positioning pin; 708, Connecting block; 709, Second spring;

[0060] 8. Dragging mechanism; 801. Guide wheel; 802. Pull rope; 8021. Sealing part; 803. Mounting frame; 804. Rewinding wheel;

[0061] 9. Feed pipe;

[0062] 10. Telescopic tube; 1001. End plate; 1002. Third spring; 1003. Connector; 1004. Corrugated hose; 1005. Connecting seat; 1006. Pull rod; 1007. Magnetic block; 1008. Guide seat; 1009. Pull head;

[0063] 11. Drive mechanism; 1101. Motor; 1102. Fixed housing; 1103. First rotating shaft; 1104. Worm gear; 1105. Worm; 1106. Fixed cylinder; 1107. Fixed base; 1108. Movable rod; 11081. Guide groove; 11082. Push bar; 11083. Screw hole; 1109. First screw; 1110. Guide bar;

[0064] 12. Transmission mechanism; 1201. Fixed gear ring; 1202. Gear; 1203. First transmission wheel; 1204. Second rotating shaft; 1205. Transmission belt; 1206. Second transmission wheel;

[0065] 13. Injection and exhaust mechanism; 1301. Cylinder; 1302. Pipe; 1303. Piston; 1304. Connecting shaft; 1305. Connecting frame; 1306. Nut; 1307. Second screw; 1308. Rotary disk. Detailed Implementation

[0066] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0067] like Figures 1-13 As shown, the pressure-maintaining grouting mechanism of the precast concrete wall grouting sleeve 4 includes a lower precast concrete wall 1 and an upper precast concrete wall 2; it also includes a grouting sleeve 4, wherein an upper reinforcing bar segment 203 and a lower reinforcing bar segment 101 are respectively provided inside the upper precast concrete wall 2 and the lower precast concrete wall 1, the grouting sleeve 4 is fixedly sleeved to the bottom end of the upper reinforcing bar segment 203, and the top end of the lower reinforcing bar segment 101 extends into the grouting sleeve 4; the grouting sleeve 4 is provided with an upper opening 401 and a lower opening 402, both of which extend to the outside of the upper precast concrete wall 2, and the lower opening 402 is connected to... The system includes a connecting pipe 403; a pressure-holding chamber 5 connected to a side frame 6, which is detachably mounted to the outer wall of the upper precast concrete wall 2 via an installation mechanism 7; a discharge pipe 9 fixedly connected to one side of the bottom of the pressure-holding chamber 5, with a telescopic pipe 10 connected to the bottom end of the discharge pipe 9 that can be pulled out or inserted from the port of the connecting pipe 403; a sealing part 8021 disposed inside the discharge pipe 9, with an adjustable gap between the sealing part 8021 and the inner wall of the discharge pipe 9; and a dragging mechanism 8 used to move the sealing part 8021 within the discharge pipe 9, which is mounted on the side frame 6.

[0068] like Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 9 As shown, there are two side frames 6. The pressure holding chamber 5 is rotatably installed between the two side frames 6, and a connecting strip 601 is fixedly installed between the two side frames 6. The top of the pressure holding chamber 5 is open, the bottom of the pressure holding chamber 5 is inclined to the horizontal plane, and a discharge port 501 is provided on the bottom side of the pressure holding chamber 5 away from the discharge pipe 9. A valve 502 is installed on the discharge port 501.

[0069] It also includes a drive mechanism 11, which includes a fixed housing 1102 fixedly mounted on the side frame 6 and a motor 1101 fixedly mounted on one side of the fixed housing 1102. A worm gear 1105 is rotatably mounted inside the fixed housing 1102. One end of the worm gear 1105 is fixedly connected to the output shaft end of the motor 1101. The worm gear 1105 is meshed with a worm wheel 1104. A first rotating shaft 1103 is fixedly mounted in the middle of the worm wheel 1104. The first rotating shaft 1103 is rotatably connected to the side frame 6 and is fixedly connected to the pressure chamber 5.

[0070] like Figure 2 As shown, the bottom of the pressure holding chamber 5 is in an inclined state, and the pressure holding chamber 5 can be rotated and adjusted so that the bottom can be adjusted to tilt towards the downward material pipe 9 or towards the discharge port 501.

[0071] The rotation adjustment is as follows: the motor 1101 drives the worm 1105 to rotate, and the meshing between the worm 1105 and the worm wheel 1104 causes the first rotating shaft 1103 to rotate. The first rotating shaft 1103 drives the pressure holding chamber 5 to rotate, thereby achieving adjustment.

[0072] By tilting the downward feed pipe 9 or the discharge port 501, it is convenient for materials to flow into the downward feed pipe 9 or the discharge port 501.

[0073] like Figure 3 and Figure 6 As shown, it also includes a transmission mechanism 12; the transmission mechanism 12 includes a fixed gear ring 1201, a gear 1202, a first transmission wheel 1203 and a second transmission wheel 1206; the fixed gear ring 1201 is fixedly connected to the side frame 6, and the fixed gear ring 1201 is coaxially arranged with the first rotating shaft 1103; the gear 1202 is meshed with the fixed gear ring 1201; a second rotating shaft 1204 is fixedly installed in the middle of the gear 1202, and the second rotating shaft 1204 is rotatably connected to the outer wall of the pressure chamber 5; the first transmission wheel 1203 is fixedly sleeved on the second rotating shaft 1204; a transmission belt 1205 is wound between the first transmission wheel 1203 and the second transmission wheel 1206.

[0074] The first transmission wheel 1203 and the second transmission wheel 1206 are synchronous pulleys, and the transmission belt 1205 is a synchronous belt.

[0075] The dragging mechanism 8 includes a take-up wheel 804, a guide wheel 801, and a pull rope 802; the take-up wheel 804 is connected to the second transmission wheel 1206, one end of the pull rope 802 is fixed to the take-up wheel 804, the top of the pressure chamber 5 is fixed to a mounting bracket 803, the guide wheel 801 is rotatably connected to the mounting bracket 803, the pull rope 802 passes around the guide wheel 801, and one end of the pull rope 802 away from the take-up wheel 804 is connected to the sealing part 8021.

[0076] It should be noted that, with material being discharged into the downward feed pipe 9, the pressure holding chamber 5... Figure 2 As shown, the sealing part 8021 is located at the bottom end of the feed pipe 9 at this time. During the process of adjusting the pressure holding chamber 5 to the state of tilting the bottom towards the discharge port 501, the pressure holding chamber 5 rotates, causing the gear 1202 to travel on the tooth surface of the gear 1202, thereby causing the gear 1202, the second rotating shaft 1204 and the first transmission wheel 1203 to rotate together. Through the transmission of the first transmission wheel 1203, the transmission belt 1205 and the second transmission wheel 1206, the winding wheel 804 rotates, and the winding wheel 804 winds up the pull rope 802, so that the pull rope 802 pulls the sealing part 8021 from the bottom end to the top end of the feed pipe 9, so that the residual material in the feed pipe 9 can be concentrated and pushed into the pressure holding chamber 5 during the adjustment of the pressure holding chamber 5.

[0077] When the pressure holding chamber 5 is adjusted to tilt downwards towards the feed pipe 9, the pressure holding chamber 5 rotates in the opposite direction. Through the aforementioned transmission, the winding wheel 804 unwinds the pull rope 802, and the pressure provided by the material in the pressure holding chamber 5 to the sealing part 8021 causes the sealing part 8021 to return to the bottom of the feed pipe 9.

[0078] When the pressure holding chamber 5 is adjusted to tilt toward the discharge port 501, the grouting in the grouting sleeve 4 is finished. The remaining grout is discharged from the discharge port 501 by opening the valve 502.

[0079] In specific implementation, it also includes an air injection / venting mechanism 13; the air injection / venting mechanism 13 includes a pipe body 1302, a cylinder body 1301, and a second screw 1307; the pipe body 1302 is rotatably connected to the side frame 6, and the pipe body 1302 is fixedly connected to the second transmission wheel 1206 and the winding wheel 804. The pipe body 1302, the second transmission wheel 1206, and the winding wheel 804 are coaxially arranged. The cylinder body 1301 is fixedly connected to the end of the pipe body 1302, and a piston 1303 is connected inside the cylinder body 1301. The inner wall of the cylinder 1301 and the side wall of the piston 1303 form a cavity. The tube 1302 communicates with the cavity. The second screw 1307 is rotatably connected to the side frame 6, and a rotating disk 1308 is fixedly installed at the end of the second screw 1307. A nut 1306 is threaded onto the second screw 1307. A connecting frame 1305 is fixedly connected to the nut 1306. A connecting shaft 1304 is rotatably connected to the connecting frame 1305. The connecting shaft 1304 is fixedly connected to the piston 1303.

[0080] The pull rope 802 and the sealing part 8021 are respectively a flexible hose and a soft ball. The winding wheel 804 has a cavity inside that communicates with the tube body 1302. The cavity is connected to the soft ball through the flexible hose.

[0081] The gas injection and venting mechanism 13 controls the gap with the inner wall of the feed pipe 9 by injecting gas into the sealing part 8021 to make it expand or venting gas to make it contract.

[0082] When the feed pipe 9 is opened to allow material to enter the grouting sleeve 4, the sealing part 8021 contracts. Specifically, by rotating the rotating disk 1308 in the forward direction, the second screw 1307 rotates, and the second screw 1307 and the nut 1306 are screwed together. The nut 1306 pulls the connecting shaft 1304 through the connecting bracket 1305. The connecting shaft 1304 pulls the piston 1303, which increases the volume of the cavity formed by the piston 1303 and the inner wall of the cylinder 1301. This allows the gas in the sealing part 8021 to enter the cavity through the cavity in the hose and the take-up wheel 804, causing the sealing part 8021 to contract. Through the above process, the piston 1303 becomes flush with the end face of the cylinder 1301, completing the operation of unsealing the sealing part 8021.

[0083] When the feed pipe 9 is closed, the piston 1303 is reset by rotating the rotating disk 1308 in the opposite direction and through the above transmission. The piston 1303 is in contact with the inner wall of the connection end between the cylinder 1301 and the pipe 1302, pushing the gas in the cavity into the sealing part 8021. The sealing part 8021 expands and seals the feed pipe 9.

[0084] When material is discharged from the discharge pipe 9 into the grouting sleeve 4, the sealing of the discharge pipe 9 is cancelled; in other states, sealing and closure are performed.

[0085] like Figure 9-12As shown, the installation mechanism 7 includes a plug-in column 701 and a movable plate 702. The plug-in column 701 is fixedly connected to the side frame 6 near the upper precast concrete wall 2. A groove is formed in the middle of the plug-in column 701, and a movable column 703 is slidably connected to the groove. The movable column 703 is fixedly connected to the movable plate 702. A sliding groove 602 is formed on the side frame 6, and the movable plate 702 is slidably connected to the sliding groove 602. A first spring 704 is installed between the movable plate 702 and the side frame 6. A pressure block 706 is provided in the groove. The pressure block 706 is fixedly connected to the movable column 703 through a connecting rod 705. The cross-section of the pressure block 706 is an isosceles trapezoidal structure, and positioning columns 707 are respectively abutted on both sides of the pressure block 706. The positioning post 707 is slidably connected to the guide holes 7011 on both sides of the insertion post 701. The guide hole 7011 has a groove 7012 on its wall, and a second spring 709 is provided in the groove 7012. The positioning post 707 is fixedly connected to a connecting block 708, and the connecting block 708 is connected to the second spring 709. The movable plate 702 is fixedly connected to a pressure rod 7021, and the end of the pressure rod 7021 away from the movable plate 702 is bent downward. The upper precast concrete wall 2 has an installation groove 201, and an installation sleeve 202 for inserting the insertion post 701 is fixedly installed in the installation groove 201. The inner wall of the installation sleeve 202 has a positioning groove 2021 for inserting the positioning post 707.

[0086] The drive mechanism 11 further includes a fixed cylinder 1106, a movable rod 1108, and a first screw 1109. The fixed cylinder 1106 is fixedly connected to the outer wall of the fixed shell 1102. A fixed seat 1107 is fixedly installed on the outer wall of the fixed cylinder 1106, and the fixed seat 1107 is fixedly connected to the side frame 6. The movable rod 1108 is clearance-fitted with the fixed cylinder 1106. A guide bar 1110 is fixedly installed on the inner wall of the fixed cylinder 1106. A guide groove 11081 is provided on the movable rod 1108. The guide bar 1110 is slidably connected to the guide groove 11081. A screw hole 11083 is provided along the length direction of the movable rod 1108. The first screw 1109 is threadedly connected to the screw hole 11083. One end of the first screw 1109 is fixedly connected to the worm gear 1105. A push bar 11082 aligned with the bent part of the pressure rod 7021 is fixedly connected to the end of the movable rod 1108.

[0087] The first screw 1109 and the screw hole 11083 have external threads and internal threads, respectively.

[0088] During the process of adjusting the pressure chamber 5 from its tilted position towards the material pipe 9 to its tilt towards the discharge port 501, the worm gear 1105 in the drive mechanism 11 drives the first screw 1109 to rotate. The first screw 1109 is screwed into the screw hole 11083. Guided by the guide bar 1110 and the guide groove 11081, the movable rod 1108 drives the push bar 11082 to approach the bent part of the pressure rod 7021. The push bar 11082 pushes the pressure rod 7021, which in turn moves the movable plate 702. The movable plate 702 moves the movable column 703, the connecting rod 705, and the pressure block 706, while simultaneously stretching the first spring 704. The pressure block 706 and the positioning column 707 move as follows: Figure 11 As shown, the width of the pressure block 706 gradually decreases in the direction away from the connecting rod 705. After the above movement, the positioning pin 707 moves by the elastic force of the second spring 709. The positioning pin 707 always abuts against the pressure block 706. The positioning pin 707 is pulled out from the positioning groove 2021, and the positioning is canceled.

[0089] During the above-mentioned cancellation of positioning, the pressure holding chamber 5 should be manually held to prevent it from falling after the positioning is cancelled.

[0090] With the above design, automatic release of positioning is achieved. After the residual material in the pressure holding chamber 5 is discharged from the discharge port 501, the plug-in post 701 can be pulled out from the mounting sleeve 202.

[0091] After disassembly, it can be reused. When connecting the lower precast concrete wall 1 and the upper precast concrete wall 2, material is loaded into the pressure-holding chamber 5. By inserting the plug-in post 701 into the mounting sleeve 202, the motor 1101 in the drive mechanism 11 drives the worm gear 1105 to rotate in the opposite direction, so that the movable rod 1108 and the push bar 11082 are reset to the desired position. Figure 9 As shown, the movable plate 702 is reset by the elastic force of the first spring 704. The movable plate 702 drives the movable column 703, the connecting rod 705 and the pressure block 706 to reset. The pressure block 706 pushes the movable column 703 into the positioning groove 2021 for positioning.

[0092] Meanwhile, during the aforementioned positioning process, the pressure chamber 5 is adjusted to tilt downwards towards the material pipe 9, and the dragging mechanism 8 unwinds the pull rope 802.

[0093] The preferred motor 1101 is a servo motor 1101, which requires an external power supply and control switch during use.

[0094] like Figure 8As shown, the telescopic tube 10 includes an end plate 1001; the end plate 1001 is fixedly connected to the bottom end of the feeding tube 9, the feeding tube 9 is connected to the connector 1003 through a corrugated hose 1004, a third spring 1002 is installed between the connector 1003 and the end plate 1001, a connecting seat 1005 is fixedly connected to the bottom of the connector 1003, a pull rod 1006 is fixedly connected to the connecting seat 1005, a guide seat 1008 is fixedly connected to the bottom of the end plate 1001, the pull rod 1006 is connected to the hole opened on the guide seat 1008 with clearance fit, a pull head 1009 is provided at the end of the pull rod 1006 away from the connecting seat 1005; a magnetic block 1007 is fixedly installed on the pull rod 1006, and the magnetic block 1007 can magnetically attract the guide seat 1008.

[0095] The telescopic tube 10 can be connected to or disconnected from the connecting tube 403.

[0096] Before rotating and adjusting the pressure holding chamber 5, the telescopic pipe 10 and the connecting pipe 403 are separated to avoid them being connected and affecting the rotation adjustment. Before adjusting the pressure holding chamber 5 to tilt the downward material pipe 9 and injecting grout into the grouting sleeve 4 through the material pipe 9, the telescopic pipe 10 and the connecting pipe 403 are connected.

[0097] The telescopic tube 10 operates as follows: by pulling the pull head 1009, the pull rod 1006 moves together with the connecting seat 1005 or the connector 1003. The connector 1003 is pulled out of the connecting pipe 403, while the third spring 1002 is compressed. At the same time, the magnetic block 1007 contacts the guide seat 1008 and magnetically attracts it to maintain the contracted state, that is, to separate it from the connecting pipe 403.

[0098] By pushing the pull head 1009, the magnetic block 1007 is separated from the guide seat 1008. Through the elastic force of the third spring 1002, the connector 1003 can enter the pipe 403 for connection.

[0099] The corrugated hose 1004 is made of plastic and can be folded and extended.

[0100] When the upper precast concrete wall 2 and the lower precast concrete wall 1 are connected, the material is discharged from the discharge pipe 9. The material enters the lower opening 402 through the telescopic pipe 10, and then enters the grouting sleeve 4. The material in the grouting sleeve 4 can enter the rubber frame 3 between the upper precast concrete wall 2 and the lower precast concrete wall 1. The grouting is completed when the material flows out of the upper opening 401.

[0101] The present invention has been described in detail above. However, those skilled in the art will understand that various modifications and alterations can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should fall within the protection scope of the present invention, which is defined by the appended claims.

Claims

1. A pressure-maintaining grouting mechanism for a precast concrete wall grouting sleeve, comprising a lower precast concrete wall (1) and an upper precast concrete wall (2); characterized in that, Also includes: The grouting sleeve (4) is provided with an upper steel bar segment (203) and a lower steel bar segment (101) in the upper precast concrete wall (2) and the lower precast concrete wall (1) respectively. The grouting sleeve (4) is fixedly sleeved to the bottom end of the upper steel bar segment (203), and the top end of the lower steel bar segment (101) extends into the grouting sleeve (4). The grouting sleeve (4) is provided with an upper opening (401) and a lower opening (402). Both the upper opening (401) and the lower opening (402) extend to the outside of the upper precast concrete wall (2), and the lower opening (402) is connected to a pipe (403). Pressure holding chamber (5), the pressure holding chamber (5) is connected to a side frame (6), the side frame (6) is detachably installed on the outer wall of the upper precast concrete wall (2) through the installation mechanism (7), the bottom side of the pressure holding chamber (5) is fixedly connected to a discharge pipe (9), the bottom end of the discharge pipe (9) is connected to a telescopic pipe (10) that can be pulled out or inserted from the port of the pipe (403). A sealing part (8021) is provided inside the feed pipe (9), and the gap between the sealing part (8021) and the inner wall of the feed pipe (9) is adjustable; The dragging mechanism (8) is used to drive the sealing part (8021) to move inside the feed pipe (9), and the dragging mechanism (8) is installed on the side frame (6); The drive mechanism (11) includes a fixed housing (1102) fixedly mounted on the side frame (6) and a motor (1101) fixedly mounted on one side of the fixed housing (1102). A worm gear (1105) is rotatably mounted inside the fixed housing (1102). One end of the worm gear (1105) is fixedly connected to the output shaft end of the motor (1101). The worm gear (1105) is meshed with a worm wheel (1104). A first rotating shaft (1103) is fixedly mounted in the middle of the worm wheel (1104). The first rotating shaft (1103) is rotatably connected to the side frame (6) and is fixedly connected to the pressure chamber (5).

2. The pressure-maintaining grouting mechanism for the precast concrete wall grouting sleeve as described in claim 1, characterized in that: There are two side frames (6), and the pressure holding chamber (5) is rotatably installed between the two side frames (6), and a connecting strip (601) is fixedly installed between the two side frames (6); the top of the pressure holding chamber (5) is open, the bottom of the pressure holding chamber (5) is inclined to the horizontal plane, and a discharge port (501) is provided on the bottom side of the pressure holding chamber (5) away from the discharge pipe (9), and a valve (502) is installed on the discharge port (501).

3. The pressure-maintaining grouting mechanism for the precast concrete wall grouting sleeve as described in claim 1, characterized in that: It also includes a transmission mechanism (12); the transmission mechanism (12) includes a fixed gear ring (1201), a gear (1202), a first transmission wheel (1203) and a second transmission wheel (1206); the fixed gear ring (1201) is fixedly connected to the side frame (6), and the fixed gear ring (1201) is coaxially arranged with the first rotating shaft (1103); the gear (1202) is meshed with the fixed gear ring (1201); the second rotating shaft (1204) is fixedly installed in the middle of the gear (1202), and the second rotating shaft (1204) is rotatably connected to the outer wall of the pressure chamber (5); the first transmission wheel (1203) is fixedly sleeved on the second rotating shaft (1204); a transmission belt (1205) is wound between the first transmission wheel (1203) and the second transmission wheel (1206).

4. The pressure-maintaining grouting mechanism for the precast concrete wall grouting sleeve as described in claim 3, characterized in that: The dragging mechanism (8) includes a take-up wheel (804), a guide wheel (801), and a pull rope (802); the take-up wheel (804) is connected to the second transmission wheel (1206), one end of the pull rope (802) is fixed to the take-up wheel (804), the top of the pressure chamber (5) is fixed to the mounting bracket (803), the guide wheel (801) is rotatably connected to the mounting bracket (803), the pull rope (802) passes around the guide wheel (801), and one end of the pull rope (802) away from the take-up wheel (804) is connected to the sealing part (8021).

5. The pressure-maintaining grouting mechanism for the precast concrete wall grouting sleeve as described in claim 4, characterized in that: It also includes an air injection and venting mechanism (13); the air injection and venting mechanism (13) includes a pipe body (1302), a cylinder body (1301), and a second screw (1307); the pipe body (1302) is rotatably connected to the side frame (6), and the pipe body (1302) is fixedly connected to the second transmission wheel (1206) and the winding wheel (804), the pipe body (1302), the second transmission wheel (1206), and the winding wheel (804) are coaxially arranged, the cylinder body (1301) is fixedly connected to the end of the pipe body (1302), and a piston (1303) is fitted inside the cylinder body (1301). The inner wall of the cylindrical body (1301) and the side wall of the piston (1303) form a cavity. The tube body (1302) communicates with the cavity. The second screw (1307) is rotatably connected to the side frame (6), and a rotating disk (1308) is fixedly installed at the end of the second screw (1307). A nut (1306) is threaded onto the second screw (1307). A connecting frame (1305) is fixedly connected to the nut (1306). A connecting shaft (1304) is rotatably connected to the connecting frame (1305). The connecting shaft (1304) is fixedly connected to the piston (1303).

6. The pressure-maintaining grouting mechanism for the precast concrete wall grouting sleeve as described in claim 4, characterized in that: The pull rope (802) and the sealing part (8021) are respectively a flexible hose and a soft ball. The winding wheel (804) has a cavity inside that communicates with the tube body (1302). The cavity is connected to the soft ball through the flexible hose.

7. The pressure-maintaining grouting mechanism for the precast concrete wall grouting sleeve as described in claim 1, characterized in that: The installation mechanism (7) includes a plug-in column (701) and a movable plate (702); the plug-in column (701) is fixed to the side of the side frame (6) near the upper precast concrete wall (2), the plug-in column (701) has a groove in the middle, the groove is slidably connected to a movable column (703), the movable column (703) is fixedly connected to the movable plate (702), the side frame (6) has a sliding groove (602), the movable plate (702) is slidably connected to the sliding groove (602), a first spring (704) is installed between the movable plate (702) and the side frame (6), a pressure block (706) is provided in the groove, the pressure block (706) is fixedly connected to the movable column (703) through a connecting rod (705), the cross section of the pressure block (706) is an isosceles trapezoidal structure, and positioning columns (707) are respectively abutted on both sides of the pressure block (706). The positioning post (707) is slidably connected to the guide holes (7011) on both sides of the insertion post (701). The guide hole (7011) has a groove (7012) on its wall. A second spring (709) is installed in the groove (7012). The positioning post (707) is fixedly connected to a connecting block (708). The connecting block (708) is connected to the second spring (709). The movable plate (702) is fixedly connected to a pressure rod (7021). The end of the pressure rod (7021) away from the movable plate (702) is bent downward. The upper precast concrete wall (2) has an installation groove (201) on its wall. An installation sleeve (202) for inserting the insertion post (701) is fixedly installed in the installation groove (201). The inner wall of the installation sleeve (202) has a positioning groove (2021) for inserting the positioning post (707).

8. The pressure-maintaining grouting mechanism for the precast concrete wall grouting sleeve as described in claim 7, characterized in that: The drive mechanism (11) further includes a fixed cylinder (1106), a movable rod (1108), and a first screw (1109); the fixed cylinder (1106) is fixedly connected to the outer wall of the fixed shell (1102), a fixed seat (1107) is fixedly installed on the outer wall of the fixed cylinder (1106), and the fixed seat (1107) is fixedly connected to the side frame (6); the movable rod (1108) is clearance-fitted to the fixed cylinder (1106); and a guide bar (1110) is fixedly installed on the inner wall of the fixed cylinder (1106). The movable rod (1108) is provided with a guide groove (11081), the guide bar (1110) is slidably connected to the guide groove (11081), the movable rod (1108) is provided with a screw hole (11083) along the length direction, the first screw (1109) is threadedly connected to the screw hole (11083), one end of the first screw (1109) is fixedly connected to the worm (1105), and the end of the movable rod (1108) is fixedly connected with a push bar (11082) aligned with the bent part of the pressure rod (7021).

9. The pressure-maintaining grouting mechanism for the precast concrete wall grouting sleeve as described in claim 1, characterized in that: The telescopic tube (10) includes an end plate (1001); the end plate (1001) is fixedly connected to the bottom end of the feed tube (9), the feed tube (9) is connected to the connector (1003) through a corrugated hose (1004), a third spring (1002) is installed between the connector (1003) and the end plate (1001), a connecting seat (1005) is fixedly connected to the bottom of the connector (1003), a pull rod (1006) is fixedly connected to the connecting seat (1005), a guide seat (1008) is fixedly connected to the bottom of the end plate (1001), the pull rod (1006) is connected to the hole opened on the guide seat (1008) with clearance fit, and a pull head (1009) is provided at the end of the pull rod (1006) away from the connecting seat (1005).

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