Prefabricated building prefabricated part grouting sleeve connecting and positioning device

Abstract

The utility model discloses a prefabricated building prefabricated part grouting sleeve connecting and positioning device which is composed of a fixing seat and a grouting sleeve, the fixing seat is cast by adopting Q355B low alloy steel and comprises a square base and a cross-shaped connecting support, the outer end of the support is provided with a mounting hole, and a bearing and a positioning rod are arranged in a center hole; the cylindrical lower portion of the grouting sleeve is matched with the center hole, the conical upper portion is provided with a grouting opening and a limiting pin, and anti-slip lines are arranged on the inner wall. 360-degree angle adjustment is achieved through rotation matching of the bearing and the clamping groove, the grouting direction is locked through inserting connection of the limiting pin and the positioning rod, and the anti-sliding lines enhance the sliding resistance of the steel bars. The device solves the problems of tedious adjustment, positioning offset, leakage and poor stability of a traditional device, is used in combination with a high-precision total station and a screw grouting machine, has the advantages of high adjustability, accurate positioning, vibration offset resistance, long-acting stability and the like, and remarkably improves the construction efficiency and the connection reliability.

Description

Technical Field

[0001] This utility model provides a sleeve connection positioning device, and particularly relates to a grouting sleeve connection positioning device for prefabricated building components. Background Technology

[0002] The grouting sleeve connection and positioning device is a key component in prefabricated buildings for achieving the connection and grouting sealing of steel bars between precast components. Its function is to ensure precise alignment of the steel bars by fixing the sleeve position and to guide the grout filling to form a reliable connection. Traditional devices usually consist of a fixed base and a sleeve. The base is connected to the precast component by bolts or welding, and the sleeve is rigidly fixed to the base. There is no adjustment mechanism between the two, and the sleeve angle and position need to be manually calibrated multiple times. Moreover, the alignment of the grouting port and the steel bar is easily affected by construction errors.

[0003] The existing device has significant limitations in its structural design: First, the sleeve is directly fixed to the base, and angle adjustment relies on complete disassembly and reassembly, which is cumbersome and difficult to adapt to complex working conditions. Second, the grouting port lacks a dynamic limiting structure, making it prone to displacement due to vibration or pressure during grouting, leading to grout leakage. Third, the connection between the sleeve and the base is too rigid, easily causing stress concentration under external impact, resulting in loosening or deformation of the connection. Fourth, the inner wall of the sleeve is smooth, making it easy for the reinforcing bar to slide after insertion, affecting positioning accuracy. These problems result in significant deficiencies in the traditional device in terms of construction efficiency, connection stability, and long-term reliability. Utility Model Content

[0004] In order to solve the above problems, this application provides a grouting sleeve connection and positioning device for prefabricated building components, which solves the problems of cumbersome adjustment, positioning misalignment, leakage and poor stability of traditional devices.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a grouting sleeve connection and positioning device for prefabricated building components, including a fixed base and a grouting sleeve, wherein the grouting sleeve is disposed on the fixed base;

[0006] The fixing base includes a square base and four connecting brackets. The four connecting brackets are arranged in a cross shape on the upper part of the square base, and the outer ends of the four connecting brackets are respectively provided with mounting holes.

[0007] The lower part of the grouting sleeve is cylindrical and the upper part is conical. The cylindrical part of the grouting sleeve is matched with the central hole of the fixing seat, and the top of the conical part of the grouting sleeve is provided with a grouting port.

[0008] Preferably, the cylindrical part of the grouting sleeve has a groove on its outer wall, and the central hole of the fixing seat has a bearing that matches it.

[0009] Preferably, the grouting port has several limiting pins that penetrate through it, and the square base of the fixing seat has a positioning rod corresponding to the ball bearing.

[0010] Preferably, a connecting seat is integrally connected to the square base of the fixed seat and sleeved on the outside of the bearing, and the positioning rod passes through the connecting seat.

[0011] Preferably, the inner wall of the conical portion of the grouting sleeve is provided with a plurality of anti-slip patterns, which extend along the generatrix of the conical portion.

[0012] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0013] This utility model achieves rapid multi-point fixing with precast components through the cross-shaped connecting bracket of the fixed seat and its outer end mounting hole. Combined with the rotational cooperation design of the cylindrical part of the grouting sleeve and the bearing and slot in the center hole of the fixed seat, the sleeve angle can be flexibly adjusted. The limiting pin of the grouting port of the conical part works with the positioning rod to lock the grouting position. The anti-slip texture of the inner wall enhances the frictional stability with the steel bars. At the same time, the connecting seat reinforces the bearing and improves the overall anti-displacement ability. It solves the problems of difficult adjustment, easy deviation and grouting leakage of traditional grouting sleeve positioning devices, and realizes the precise adjustment, efficient installation and long-term stability of grouting sleeve connection in prefabricated buildings.

[0014] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the installation of a grouting sleeve connection and positioning device for prefabricated building components according to this utility model.

[0016] Figure 2 This is an exploded view of a grouting sleeve connection and positioning device for prefabricated building components according to this utility model.

[0017] Figure 3 This is a cross-sectional view of a grouting sleeve connection and positioning device for prefabricated building components according to the present invention.

[0018] As shown in the figure:

[0019] 1. Fixing base; 2. Grouting sleeve;

[0020] 11. Mounting hole; 12. Center hole; 13. Bearing; 14. Positioning rod; 15. Connecting seat;

[0021] 21. Slot; 22. Grouting port; 23. Limiting pin; 24. Anti-slip texture. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] like Figure 1 and Figure 2 As shown, a grouting sleeve connection and positioning device for prefabricated building components consists of a fixed base 1 and a grouting sleeve 2. The fixed base 1 includes a square base with four connecting brackets arranged in a cross shape on its upper part, each bracket having a mounting hole 11 at its outer end. The lower part of the grouting sleeve 2 is cylindrical, and the upper part is conical. The cylindrical part mates with the central hole 12 of the fixed base 1, and the top of the conical part has a grouting port 22. In addition, a bearing 13 is provided on the inner wall of the central hole 12 of the fixed base 1, and a positioning rod 14 and a connecting seat 15 are also provided on the square base. The outer wall of the cylindrical part of the grouting sleeve 2 has a groove 21, and the outside of the grouting port 22 has several limiting pins 23. The inner wall of the conical part is embedded with anti-slip textures 24 extending along the generatrix direction.

[0026] In this implementation scheme, the components work together through the following connections and positional relationships:

[0027] Rotational adjustment structure of fixed seat 1 and grouting sleeve 2: The cylindrical part of grouting sleeve 2 is embedded in the central hole 12 of fixed seat 1, and the outer wall groove 21 engages with the ball bearing 13 in the central hole to form a rotatable circumferential limit; the sleeve 2 can rotate freely around the central axis, while the depth of the groove 21 restricts its axial displacement to prevent it from coming out.

[0028] Grouting orientation locking mechanism: The outer wall of the grouting port 22 at the conical top of the sleeve 2 is provided with multiple sets of limiting pins 23. When the sleeve rotates to the target angle, the limiting pins 23 are inserted and locked with the positioning rod 14 on the square base of the fixed seat 1 to ensure that the grouting direction is accurately aligned with the steel bar; the connecting seat 15 covers the outer ring of the bearing 13 and is reinforced by the positioning rod 14, forming a double layer of protection against shear force.

[0029] Anti-slip and stress dispersion design: The anti-slip texture 24 on the conical inner wall of the sleeve 2 extends along the generatrix, forming multi-directional frictional resistance with the surface of the inserted steel bar to prevent the steel bar from shrinking back; at the same time, the cross-shaped connecting bracket disperses the force of the fixing seat 1 to the four mounting holes 11, reducing the risk of local stress concentration.

[0030] Based on the above implementation scheme, the innovation and beneficial effects of this device are as follows:

[0031] Enhanced adjustability: The rotational engagement of bearing 13 and slot 21 allows sleeve 2 to achieve 360° angle fine adjustment without disassembly. Combined with the quick-connect locking of limit pin 23 and positioning rod 14, it solves the problem of traditional device adjustment relying on repeated manual disassembly and assembly, improving construction efficiency by more than 40%.

[0032] Stability optimization: The dual limiting structure of the connecting seat 15 and the positioning rod 14 effectively resists the impact force and vibration interference of grouting, and avoids grout leakage caused by sleeve offset; the anti-slip texture 24 increases the friction coefficient of the contact surface, so that the positioning accuracy error of the steel bar is controlled within ±1mm.

[0033] Long-term reliability: The distributed mounting holes 11 of the cross-shaped connecting bracket and the square base work together to distribute the external load and reduce the risk of deformation of the fixed seat 1; the streamlined design of the conical grouting port 22 and the anti-slip texture 24 on the inner wall ensures smooth flow of grout and avoids stress concentration when the steel bar is inserted.

[0034] This device, through multi-level limiting, dynamic adjustment and mechanical optimization design, systematically overcomes the rigid fixing defects of traditional grouting sleeve positioning devices, and realizes an integrated solution of "precise adjustment - efficient locking - long-term stability" in prefabricated building construction.

[0035] like Figure 2 and Figure 3As shown, in this connection and positioning device, the grouting sleeve 2 uses the groove 21 on the outer wall of its cylindrical portion to cooperate with the bearing 13 on the inner wall of the center hole 12 of the fixed seat 1, achieving rapid installation and precise positioning. During grouting, the grout is injected from the grouting port 22, and the limiting pin 23 prevents the grouting port 22 from closing accidentally, ensuring a smooth grouting process. The positioning rod 14 passes through the connecting seat 15 and corresponds to the ball bearing 13, further enhancing structural stability and preventing the grouting sleeve 2 from shifting during use. The anti-slip texture 24 on the inner wall of the conical portion enhances the friction at the connection, preventing the component from loosening due to external forces after grouting, ensuring the reliability and durability of the connection. The overall design is ingenious and effectively solves the technical problem of connecting and positioning the grouting sleeve of prefabricated components in prefabricated buildings.

[0036] In this implementation plan, the device needs to be operated in conjunction with existing technologies during implementation: Before construction, a high-precision total station is used to perform three-dimensional coordinate positioning of the precast components. M12 expansion bolts are used to anchor the precast steel plate of the component through the mounting holes 11 at the outer end of the cross-shaped connecting bracket of the fixed seat 1. A magnetic temporary fixing clamp is used to hold the grouting sleeve 2 for initial attitude calibration. During the adjustment phase, the wing nut of the positioning rod 14 is loosened, and the sleeve 2 is manually rotated to the target angle where the bearing 13 engages with the slot 21. Then, the limit pin 23 is inserted into the corresponding slot of the positioning rod 14, and the nut is simultaneously tightened to 25 N·m using a digital torque wrench to lock it in place. Orientation; During grouting, the quick-release sealing ring is fitted between the grouting port 22 and the hose of the screw grouting machine. The grouting machine is started and the pressure is controlled within the range of 0.3-0.5MPa to inject high-strength non-shrink grout at a uniform speed. At the same time, the sleeve posture deviation is monitored by an infrared level. If the deviation exceeds ±1mm, the process is paused and the insertion position of the limit pin 23 is finely adjusted. After grouting is completed, the density of the grout inside the sleeve is tested by an ultrasonic flaw detector. After confirmation that it is qualified, the temporary clamps and sealing rings are removed. Finally, the long-term stability of the structure is ensured by the corrosion resistance of the Q355B fixed seat 1 and the 304 stainless steel sleeve 2 and the durability of the GCr15 bearing 13.

[0037] In one or more feasible embodiments, this device needs to be used in conjunction with existing high-precision total stations, screw-type grouting machines, and temporary fixing fixtures. The device's mounting base is made of Q355B low-alloy steel to balance strength and weight; the grouting sleeve is precision-machined from 304 stainless steel; the bearings use GCr15 bearing steel balls for low-friction rotation; the limit pins are made of nitrided 40Cr alloy steel to improve wear resistance; and the anti-slip texture is enhanced by laser-clad tungsten carbide coating to improve shear resistance. Furthermore, a quick-release sealing ring, a technology based on existing technology, needs to be installed between the grouting port and the external grouting pipe to prevent grout leakage. The synergistic application of these existing technologies and materials further enhances the adaptability and reliability of this device in complex construction environments.

[0038] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A grouting sleeve connection and positioning device for prefabricated building components, characterized in that: It includes a fixed base (1) and a grouting sleeve (2), wherein the grouting sleeve (2) is disposed on the fixed base (1); The fixed base (1) includes a square base and four connecting brackets. The four connecting brackets are arranged in a cross shape on the upper part of the square base, and the outer ends of the four connecting brackets are respectively provided with mounting holes (11). The lower part of the grouting sleeve (2) is cylindrical and the upper part is conical. The cylindrical part of the grouting sleeve (2) is matched with the central hole (12) of the fixing seat (1). The top of the conical part of the grouting sleeve (2) is provided with a grouting port (22).

2. The grouting sleeve connection and positioning device for prefabricated building components according to claim 1, characterized in that: The cylindrical part of the grouting sleeve (2) has a groove (21) on its outer wall, and the center hole (12) of the fixing seat (1) has a bearing (13) that cooperates with it on its inner wall.

3. The grouting sleeve connection and positioning device for prefabricated building components according to claim 2, characterized in that: The grouting port (22) has several limiting pins (23) that penetrate through it, and the square base of the fixing seat (1) has a positioning rod (14) that corresponds to the ball bearing (13).

4. The grouting sleeve connection and positioning device for prefabricated building components according to claim 3, characterized in that: The fixed base (1) has an integrally connected connecting seat (15) sleeved on the outside of the bearing (13), and the positioning rod (14) passes through the connecting seat (15).

5. The grouting sleeve connection and positioning device for prefabricated building components according to claim 1, characterized in that: The inner wall of the conical part of the grouting sleeve (2) is provided with a number of anti-slip patterns (24), which extend along the generatrix of the conical part.

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