Rebar connection sleeve grouting nozzle interference installation device and use and rebar connection sleeve

Abstract

The invention discloses an interference fit installation device for a grouting nozzle of a grouting sleeve for connecting steel bars, which simplifies the interference fit installation cooperation process, and the entire installation process is simple and efficient, and does not require too much experience or too high professional technical requirements; the interference fit installation has accurate precision, the sealing quality between the grouting nozzle and the installation port is reliable, the connection is firm, and it has an excellent sealing effect that cannot be compared with ordinary threaded connection or welding.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete building construction, in particular to a grouting installation method of a steel bar grouting sleeve. Background Art

[0002] Grouting sleeves for steel bar connection are important components for steel bar connection during on-site construction. They are parts that connect the threaded steel bars in adjacent reinforced concrete building components. With the development of prefabricated buildings, their application has become more and more mature. Grouting sleeves have solved the problem of inconvenient steel bar connection during on-site assembly of prefabricated buildings. The use of grouting sleeves makes on-site assembly construction in the construction industry possible, greatly improving the efficiency of construction and saving time, manpower and site costs.

[0003] The grouting / discharging nozzle of the grouting sleeve directly affects the grouting effect, whether in the prefabricated component factory or in the assembly at the construction site, and further affects the reliability of the sleeve connection. Therefore, the grouting / discharging nozzle of the grouting sleeve plays a vital role in the use process.

[0004] At present, the installation of the filling / discharging nozzle of the machined grouting sleeve mainly adopts threaded connection and welding methods. For example, the steel grouting sleeve provided by the authorized patent CN205804771U, the second connecting piece (injection and discharge nozzle) is connected to the sleeve body by threads. However, the threaded connection method has the following disadvantages: the thread is easily damaged, making the sleeve and the filling / discharging nozzle unusable. Some existing technologies also use welding methods, but there are also many disadvantages. For example, when spot welding is adopted, the sealing is unreliable; when circumferential welding is adopted, welding deformation of the sleeve is likely to occur. The common disadvantages of the above two connection methods are: 1. The sealing performance of the connection is unreliable. 2. High labor and time costs. 3. Low efficiency.

[0005] In addition to threaded connection and welding, some use interference fit to fix the grouting nozzle to the sleeve. For example, authorized patent CN207211526U provides a reinforced cement grouting connection sleeve. Although it mentions that the grouting port, the discharge port and the mounting hole are matched by gluing, welding, riveting, threading, interference fit and the like, it does not disclose how to accurately interfere with the circular grouting port and the discharge port to fit into the mounting hole on the side of the sleeve. The lack of special tools makes the interference fit installation have certain technical difficulties. Summary of the invention

[0006] In view of the above deficiencies in the prior art, in order to ensure that the grouting nozzle of the grouting sleeve is accurately installed in the installation opening of the grouting sleeve with interference fit, the present invention provides an interference fit installation device for the grouting nozzle of the steel bar grouting sleeve, which is specifically achieved through the following technology.

[0007] The interference installation device of the steel bar connection sleeve grouting nozzle comprises a fixing seat, a pressure head, a magnetic part and a sleeve positioning cone head; the fixing seat is provided with a first blind hole horizontally from the side, the aperture of the first blind hole matches the outer diameter of the grouting sleeve, the top surface of the fixing seat is provided with a second blind hole vertically downward, the aperture of the second blind hole is larger than the aperture of the installation hole on the grouting sleeve, and the bottom of the second blind hole is provided with a first through hole vertically downward with an aperture matching the outer diameter of the grouting nozzle; the first through hole is connected with the first blind hole; a through groove is also provided above the first blind hole of the fixing seat, the through groove makes the side of the first blind hole connected with the second blind hole and the first through hole, and the width of the through groove matches the diameter of the grouting nozzle;

[0008] The diameter of the pressure head matches the second blind hole, and a countersunk hole is vertically arranged on the bottom surface of the pressure head; the magnetic part is arranged in the countersunk hole, and the magnetic part is cylindrical; the aperture of the countersunk hole matches the outer diameter of the grouting nozzle, and the outer diameter of the magnetic part matches the inner diameter of the grouting nozzle;

[0009] The upper part of the sleeve positioning cone head has the same overall shape as the pressure head, and the lower part of the sleeve positioning cone head is provided with a limiter and a guide member from top to bottom in sequence, the limiter is cylindrical, and the guide member is inverted frustum shape, and the diameter of the limiter and the diameter of the large end of the guide member are equal to the aperture of the mounting hole;

[0010] After the grouting sleeve is completely inserted into the first blind hole and the pressure head is placed in the second blind hole, the second blind hole, the countersunk hole, the magnetic part, the first through hole and the mounting hole are coaxial; after the sleeve positioning cone head is placed in the second blind hole, the limit part, the guide part and the mounting hole are coaxial.

[0011] The present invention also provides a method for using the interference installation device for the grouting nozzle of the grouting sleeve for connecting steel bars, and the interference installation is performed by the following method:

[0012] S1, inserting the grouting sleeve into the first blind hole so that the mounting hole is initially aligned with the first through hole;

[0013] S2, inserting the sleeve positioning cone head into the second blind hole, and slowly inserting the guide member and the limit member into the mounting hole, so that the mounting hole and the first through hole are precisely aligned, and then taking out the sleeve positioning cone head;

[0014] S3, inserting the grouting nozzle into the countersunk hole of the pressure head, and inserting the magnetic member into the interior of the grouting nozzle, at which time the side wall of the grouting nozzle is embedded between the inner wall of the countersunk hole and the side wall of the magnetic member;

[0015] S4, inserting the pressure head and the grouting nozzle into the second blind hole, applying an external force upward and downward on the pressure head to press the grouting nozzle into the mounting hole, and then removing the pressure head;

[0016] S5. Pull the grouting sleeve and the grouting nozzle out of the first blind hole along the through groove to complete the installation.

[0017] In the above-mentioned interference installation device for the grouting nozzle, the outer diameter of the grouting nozzle is larger than the aperture of the mounting hole on the grouting sleeve (i.e., the interference amount. The interference amount can be selected as a suitable specific value as long as it meets the functional requirements, and is related to the materials of the grouting nozzle and the grouting sleeve). The aperture of the first through hole and the width of the through groove need to be equal to the outer diameter of the grouting nozzle, otherwise the grouting nozzle cannot be inserted into the first through hole mounting hole, and the grouting sleeve and the grouting nozzle cannot be removed after the installation is completed. The aperture of the second blind hole is larger than the first through hole, and the purpose is to form a limiting step to limit the depth of the pressure head inserted into the first blind hole, thereby controlling the depth of the grouting nozzle inserted into the mounting hole. The function of the magnetic part is to absorb the (iron) grouting nozzle, and the difference between the diameter of the countersink and the diameter of the magnetic part is the side wall thickness of the grouting nozzle, so that the grouting nozzle can be limited in the countersink by the clamping effect of the countersink and the magnetic part. The function of the sleeve positioning cone head is to further accurately align the mounting hole on the grouting sleeve with the first through hole after the grouting sleeve is inserted, so as to avoid the grouting nozzle being unable to be accurately installed in the mounting hole due to the lack of accurate alignment caused by the rotation of the grouting sleeve. The guide member of the sleeve positioning cone head is used to guide the limit member to insert into the mounting hole, and at the same time fine-tune and correct so that the mounting hole is coaxial with the first through hole.

[0018] Preferably, the pressure head includes a frustum portion at the top and a cylinder portion at the bottom, and the countersunk hole is vertically arranged upward from the bottom surface of the cylinder portion. The function of the frustum portion is to guide other pressure-providing equipment (such as hydraulic equipment) to accurately match and fix with the pressure head.

[0019] Preferably, the bottom of the inner wall of the countersunk hole is provided with a circle of inclined surfaces for limiting the position of the grouting nozzle. The function of the inclined surface is to insert the grouting nozzle into the countersunk hole to the correct position through the guidance of the inclined surface.

[0020] Preferably, a second through hole is provided on the side opposite to the side on which the first blind hole is provided on the fixing seat, and the second through hole has the same aperture as the first blind hole and is mutually connected. This arrangement enables the first blind hole to be completely connected with the second through hole, and the grouting sleeve can be inserted into the first blind hole and pass out of the second through hole. Since the distances between the mounting holes and the end of the grouting sleeves of different models are different, the purpose of this is to be able to adapt to different models of grouting sleeves.

[0021] Preferably, the magnetic member is fixed in the countersunk hole by an axially arranged bolt.

[0022] Preferably, the bottom surface of the fixing seat is provided with a positioning pin hole for installing a positioning pin, so as to position the fixing seat at a specific position on the desktop.

[0023] Preferably, the diameter of the first blind hole is 0.5-1 mm larger than the outer diameter of the grouting sleeve, and the depth of the first through hole is 8-10 mm.

[0024] Preferably, the pressing head is made of a metal material with a tensile strength greater than 600 MPa, a yield strength greater than 355 MPa, and a hardness greater than HRC60.

[0025] The present application also provides a steel bar connection sleeve containing a grouting nozzle which is formed by interference installation using the above-mentioned device and installation method.

[0026] Compared with the prior art, the present invention is beneficial in that:

[0027] 1. Invented a simple installation device, which simplifies the interference installation process, and the entire installation process is simple and efficient, without requiring too much experience or high professional technical requirements;

[0028] 2. The interference fit installation is accurate, the sealing quality between the grouting nozzle and the installation port is reliable, the connection is firm, and it has an excellent sealing effect that cannot be matched by ordinary threaded connection or welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the external three-dimensional structure of the grouting nozzle interference installation device of Example 1 after the grouting sleeve, the pressure head and the grouting nozzle are inserted;

[0030] Figure 2 It is a top view of the interference fit installation device of the grouting nozzle of Example 1;

[0031] Figure 3 for Figure 2 The cross-sectional view of the AA surface;

[0032] Figure 4 For inserting grouting sleeve and sleeve positioning cone Figure 2 The cross-sectional view of the AA surface;

[0033] Figure 5 It is a cross-sectional view of the pressure head and the magnetic member of the interference fit installation device of the grouting nozzle of Example 1;

[0034] Figure 6 A cross-sectional view of a fixing seat of a grouting sleeve of the grouting nozzle interference installation device of Example 1

[0035] Figure 7 It is a cross-sectional view of a grouting sleeve of the interference fit installation device of the grouting nozzle of Example 1;

[0036] Figure 8 A cross-sectional view of a grouting nozzle of the grouting nozzle interference mounting device of Example 1;

[0037] Fig. 9 for Figure 5 A local enlarged view of point B;

[0038] Fig.10 It is a schematic diagram of the external three-dimensional structure of the grouting nozzle interference installation device of Example 2 after the grouting sleeve, the pressure head and the grouting nozzle are inserted;

[0039] Fig.11 is a cross-sectional view of the interference fit installation device of the grouting nozzle of Example 2;

[0040] Fig.12 It is a cross-sectional view of the pressure head and magnetic member of the interference fit installation device of the grouting nozzle of Example 2;

[0041] Fig.13 It is a right side view of the fixing seat of the interference fit installation device of the grouting nozzle of Example 2;

[0042] In the figure: 1, fixing seat; 2, pressure head; 3, magnetic part; 4, sleeve positioning cone head; 5, first blind hole; 6, grouting sleeve; 7, second blind hole; 8, mounting hole; 9, grouting nozzle; 10, first through hole; 11, through groove; 12, countersunk hole; 13, bolt; 14, limit member; 15, guide member; 16, frustum part; 17, cylinder part; 18, inclined surface; 19, second through hole; 20, positioning pin hole. DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Example 1

[0045] like Figure 1-9 As shown, the grouting nozzle interference installation device of the grouting sleeve for steel bar connection provided in this embodiment includes a fixing seat 1, a pressure head 2, a magnetic member 3, and a sleeve positioning cone head 4; Figure 6 As shown, the fixing seat 1 is provided with a first blind hole 5 horizontally from the side, the aperture of the first blind hole 5 matches the outer diameter of the grouting sleeve 6, the top surface of the fixing seat 1 is provided with a second blind hole 7 vertically downward, the aperture of the second blind hole 7 is larger than the aperture of the mounting hole 8 on the grouting sleeve 6, and the bottom of the second blind hole 7 is provided with a first through hole 10 vertically downward, the aperture of which matches the outer diameter of the grouting nozzle 9; the first through hole 10 is connected with the first blind hole 5; a through groove 11 is also provided above the first blind hole 5 of the fixing seat 1, the through groove 11 makes the side of the first blind hole 5 connected with the second blind hole 7 and the first through hole 10, and the width of the through groove 11 matches the diameter of the grouting nozzle 9.

[0046] like Figure 3 , 5 As shown, the diameter of the pressure head 2 matches the second blind hole 7, and a countersunk hole 12 is vertically upwardly provided on the bottom surface of the pressure head 2; the magnetic component 3 is provided in the countersunk hole 12, and the magnetic component 3 is cylindrical and fixed in the countersunk hole 12 by a bolt 13 arranged at the axis; the aperture of the countersunk hole 12 matches the outer diameter of the grouting nozzle 9, and the outer diameter of the magnetic component 3 matches the inner diameter of the grouting nozzle 9;

[0047] like Figure 4 As shown, the upper part of the sleeve positioning cone head 4 has the same overall shape as the pressure head 2, and the lower part of the sleeve positioning cone head 4 is provided with a limiter 14 and a guide member 15 from top to bottom, the limiter 14 is cylindrical, and the guide member 15 is an inverted frustum, and the diameter of the limiter 14 and the large end diameter of the guide member 15 are equal to the aperture of the mounting hole 8;

[0048] After the grouting sleeve 6 is fully inserted into the first blind hole 5 and the pressure head 2 is placed in the second blind hole 7, the second blind hole 7, the countersunk hole 12, the magnetic part 3, the first through hole 10 and the mounting hole 8 are coaxial; after the sleeve positioning cone head 4 is placed in the second blind hole 7, the limit part 14 and the guide part 15 are coaxial with the mounting hole 8.

[0049] The method of using the grouting nozzle interference installation device of this embodiment is as follows:

[0050] Insert the grouting sleeve 6 into the first blind hole 5 so that the mounting hole 8 is initially aligned with the first through hole 10;

[0051] S2, inserting the sleeve positioning cone head 4 into the second blind hole 7, and slowly inserting the guide member 15 and the stop member 14 into the mounting hole 8, so that the mounting hole 8 and the first through hole 10 are precisely aligned, and then taking out the sleeve positioning cone head;

[0052] S3, inserting the grouting nozzle 9 into the countersunk hole 12 of the pressure head 2, and inserting the magnetic member 3 into the inside of the grouting nozzle 9, at this time, the side wall of the grouting nozzle 9 is embedded between the inner wall of the countersunk hole 12 and the side wall of the magnetic member 3;

[0053] S4, inserting the pressure head 2 and the grouting nozzle 9 into the second blind hole 7, applying an external force downward on the pressure head 2 to press the grouting nozzle 9 into the mounting hole 8, and then taking out the pressure head 2;

[0054] S5. Pull the grouting sleeve 6 and the grouting nozzle 9 out of the first blind hole 5 along the through groove 11, and the installation is completed.

[0055] Example 2

[0056] like Figure 10-13 The present embodiment is improved as follows based on the embodiment 1:

[0057] 1. If Fig.11 , 12 As shown, the pressure head 2 includes a frustum portion 16 located at the upper part and a cylindrical portion 17 located at the lower part, and the countersunk hole 12 is vertically arranged upward from the bottom surface of the cylindrical portion 17; the function of the frustum portion 16 is to guide other pressure-providing equipment (such as hydraulic equipment) to accurately match and fix with the pressure head 2;

[0058] 2. If Fig.12 As shown, the bottom of the inner wall of the countersunk hole 12 is provided with a circle of inclined surfaces 18 for limiting the position of the grouting nozzle 9; the function of the inclined surface 18 is to insert the grouting nozzle 9 into the countersunk hole 12, through the guidance of the inclined surface 18, the grouting nozzle 9 is inserted into the accurate position;

[0059] 3. If Fig.11 , 13 As shown, a second through hole 19 is provided on the side opposite to the side on which the first blind hole 5 is provided on the fixing seat 1. The second through hole 19 has the same diameter as the first blind hole 5 and is interconnected. This arrangement allows the first blind hole 5 to be completely connected to the second through hole 19, and the grouting sleeve 6 can be inserted into the first blind hole 5 and pass through the second through hole 19. Since the distances between the mounting hole 8 and the end of the grouting sleeve 6 are different for different types of grouting sleeves 6, the purpose of this is to be able to adapt to different types of grouting sleeves 6;

[0060] 4. If Fig.11 As shown, the bottom surface of the fixing base 1 is provided with a positioning pin hole 20 for installing a positioning pin, the function of which is to position the fixing base 1 at a specific position on the desktop.

Claims

1. An interference fit installation device for a grouting nozzle of a steel bar connection sleeve, characterized in that: It comprises a fixing seat, a pressure head, a magnetic part, and a sleeve positioning cone head; the fixing seat is provided with a first blind hole horizontally from the side, the aperture of the first blind hole matches the outer diameter of the grouting sleeve, the top surface of the fixing seat is provided with a second blind hole vertically downward, the aperture of the second blind hole is larger than the aperture of the mounting hole on the grouting sleeve, and the bottom of the second blind hole is provided with a first through hole vertically downward with an aperture matching the outer diameter of the grouting nozzle; the first through hole is connected with the first blind hole; a through groove is also provided above the first blind hole of the fixing seat, the through groove connects the side of the first blind hole with the second blind hole and the first through hole, and the width of the through groove matches the diameter of the grouting nozzle; The diameter of the pressure head matches the second blind hole, and a countersunk hole is vertically arranged on the bottom surface of the pressure head; the magnetic part is arranged in the countersunk hole, and the magnetic part is cylindrical; the aperture of the countersunk hole matches the outer diameter of the grouting nozzle, and the outer diameter of the magnetic part matches the inner diameter of the grouting nozzle; the pressure head includes a frustum part located at the upper part and a cylinder part located at the lower part, and the countersunk hole is arranged vertically upward from the bottom surface of the cylinder part, and a circle of inclined surfaces for limiting the grouting nozzle is arranged at the bottom of the inner wall of the countersunk hole; The upper part of the sleeve positioning cone head has the same overall shape as the pressure head, and the lower part of the sleeve positioning cone head is provided with a limiter and a guide member from top to bottom in sequence, the limiter is cylindrical, and the guide member is inverted frustum shape, and the diameter of the limiter and the diameter of the large end of the guide member are equal to the aperture of the mounting hole; After the grouting sleeve is completely inserted into the first blind hole and the pressure head is placed in the second blind hole, the second blind hole, the countersunk hole, the magnetic part, the first through hole and the mounting hole are coaxial; after the sleeve positioning cone head is placed in the second blind hole, the limit part, the guide part and the mounting hole are coaxial.

2. The interference fit installation device for the grouting nozzle according to claim 1, characterized in that: A second through hole is provided on the side surface opposite to the side surface on which the first blind hole is provided on the fixing seat. The second through hole has the same aperture as the first blind hole and is interconnected.

3. The interference fit installation device for the grouting nozzle according to claim 1, characterized in that: The magnetic part is fixed in the countersunk hole by a bolt arranged at the axis.

4. The interference fit installation device for the grouting nozzle according to claim 1, characterized in that: The bottom surface of the fixing seat is provided with a positioning pin hole for installing a positioning pin.

5. The interference fit installation device for the grouting nozzle according to claim 1, characterized in that: The diameter of the first blind hole is 0.5-1 mm larger than the outer diameter of the grouting sleeve, and the depth of the first through hole is 8-10 mm.

6. A method for using the interference fit installation device for a steel bar connection sleeve grouting nozzle according to claim 1, characterized in that: Use the following method to perform interference installation: S1, inserting the grouting sleeve into the first blind hole so that the mounting hole is initially aligned with the first through hole; S2, inserting the sleeve positioning cone head into the second blind hole, and slowly inserting the guide member and the limit member into the mounting hole, so that the mounting hole and the first through hole are precisely aligned, and then taking out the sleeve positioning cone head; S3, inserting the grouting nozzle into the countersunk hole of the pressure head, and inserting the magnetic member into the interior of the grouting nozzle, at which time the side wall of the grouting nozzle is embedded between the inner wall of the countersunk hole and the side wall of the magnetic member; S4, inserting the pressure head and the grouting nozzle into the second blind hole, applying an external force upward and downward on the pressure head to press the grouting nozzle into the mounting hole, and then removing the pressure head; S5. Pull the grouting sleeve and the grouting nozzle out of the first blind hole along the through groove to complete the installation.

7. The method for using the interference fit installation device for the grouting nozzle according to claim 6, characterized in that: The material of the pressure head is a metal material with a tensile strength greater than 600 MPa, a yield strength greater than 355 MPa, and a hardness greater than HRC60.

8. A steel bar connection sleeve produced using the grouting nozzle interference installation device according to any one of claims 1 to 5.

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