CN113216522B - A method of connecting steel bars - Google Patents

Abstract

The invention relates to a steel bar connection sleeve and a steel bar connection method, belonging to the steel bar connection technology in the technical field of civil engineering, including a steel bar connection sleeve, a boss, a steel bar I, a steel bar pier head, a steel bar II, a threaded pier thick end, a threaded hole, Bolts; the device and connection method of the present application are convenient in preparation and processing, high in efficiency, low in preparation, construction and installation costs, and reliable in connection; when threaded holes and matching bolts are not provided, simple and economical bolts that only require tensile strength can be provided. Reinforcement connection method; when setting threaded holes and matching bolts, it can also provide a reinforcement connection method that requires tensile and compression resistance. Because there is no need to move the steel bars, and the gap between the inner diameter of the boss of the steel bar connecting sleeve and the diameter of the steel bar can eliminate part of the installation tolerance, it is especially suitable for the steel bar connection of prefabricated concrete components and finished steel cage construction and installation.

Description

A method of connecting steel bars

technical field

The invention belongs to the steel bar connection technology in the technical field of civil engineering, and in particular relates to a steel bar connection sleeve and a connection method.

Background technique

For prefabricated concrete structures, during the construction and installation of prefabricated concrete components and finished steel cages, the connection method of steel bars restricts the quality, efficiency and cost of the project; since the steel bars cannot be rotated, reliable and low-cost straight thread sleeve connections cannot be used.

For the connection of vertical steel bars, grouting method and extruded steel sleeve can be used for connection, but because of its connection quality, it is widely criticized and tends to be gradually marginalized; straight thread sleeve connection with positive and negative wires can be used, but Because the thread is easily damaged under the action of its own weight, resulting in connection failure, it has not been used;

For the connection of horizontal steel bars, since the prefabricated concrete members and finished steel cages cannot move horizontally, the connection of grouting sleeves is not sufficient for exhaust, and the use of extruded steel sleeves is inconvenient to operate due to the small spacing between steel bars. Conventional threaded sleeves cannot There are many problems and difficulties in connection such as moving and implementing connection.

In view of the problems existing in the connection of steel bars in prefabricated concrete structures, many innovative connection methods have emerged in recent years.

Invention patent application specification CN201910632283.4 discloses a YK adjustable high-strength steel bar connection joint, including a connecting sleeve, connecting steel bars I and II connected to both ends of the connecting sleeve, and a first inner sleeve is arranged inside the connecting sleeve. One end of the first inner sleeve is provided with a central counterbore; the connecting sleeve is provided with an internal thread on the inner wall of the section away from the connecting steel bar I, which is screwed with the external thread on the wall of one end of the added second inner sleeve. The center hole of the sleeve is an internally threaded through hole, and the externally threaded end of the connecting steel bar II is connected with the second inner sleeve through the third inner sleeve, and the center hole of the third inner sleeve is an internally threaded through hole or an internally threaded countersunk hole , the outer wall of the third inner sleeve is provided with external threads, all the external thread ends of the connecting steel bar II are screwed into the center hole of the third inner sleeve, and the third inner sleeve is screwed into the center hole of the second inner sleeve. In this invention, a third inner sleeve is screwed to the external thread end of the connecting steel bar II to avoid the brittle fracture of the external thread of the connecting steel bar II.

The utility model patent authorization specification CN202020819611.X discloses a prefabricated steel bar straight thread connection device, including a first screw sleeve, a second screw sleeve and a connecting sleeve. The internal threads of the first screw sleeve and the second screw sleeve are respectively used to screw together with the external threads of the first steel bar head and the second steel wire head to form a first thread pair and a second helical pair, and the second screw sleeve and the second screw thread A threaded sleeve is respectively connected to the connecting sleeve from both sides of the connecting sleeve, and the external threads of the second threaded sleeve and the first threaded sleeve are respectively screwed with the internal threads of the connecting sleeve to form a third thread pair and a fourth thread pair. vice. The pitches of the first thread pair to the fourth thread pair are all equal, and the sum of the axial fit clearances of the first thread pair to the fourth thread pair is not less than one pitch. The utility model can realize reliable connection between the two steel bars under the condition that the two steel bars cannot move radially and axially or rotate, and the helical lines of the threads of the two steel bars have deviations and dislocations.

The utility model patent authorization specification CN201521021063.1 discloses a new type of steel bar connecting sleeve, including the connecting sleeve, connecting steel bars I and II connected to both ends of the connecting sleeve, and the diameter of one end of the connecting sleeve is set to be larger than the diameter of the connecting steel bar I The equal-diameter necking, the connecting sleeve is provided with a first inner sleeve, the outer diameter of the first inner sleeve is larger than the diameter of the equal-diameter necking but smaller than the inner diameter of the connecting sleeve, and one end of the first inner sleeve is provided with Center counterbore, the counterbore hole is processed with internal thread, the end section of the connecting steel bar I is processed with external thread, the end of the connecting steel bar I passes through the equal-diameter shrinkage and is screwed with the internal thread of the counterbore hole of the first inner sleeve , the other end of the first inner sleeve is provided with a guide head, the inner wall of the other end section of the connecting sleeve is provided with an internal thread, which is screwed with the external thread on the wall of one end of the added second inner sleeve, and the second internal The central hole of the sleeve is a through hole, the inner wall of the through hole is processed with internal threads, and the end section of the connecting steel bar II is processed with external threads to cooperate with the internal threads on the inner wall of the through hole, and the diameter of the through hole is greater than or equal to the diameter of the guide head. The utility model effectively prevents axial pressure, improves connection strength, and can realize reinforcement length compensation, improve reinforcement concentricity, and improve installation efficiency.

The common problems of the above-mentioned disclosed technical solutions are that the connection structure is complicated, there are many connection parts, and there are many links in connection construction and installation, and the production and connection construction and installation of connection parts are inefficient and costly.

Therefore, it is necessary to develop a technical solution with simple structure and convenient connection, which can improve the production and connection construction and installation efficiency of connectors, and reduce the cost of preparation and construction and installation.

Contents of the invention

The technical problem to be solved by the present invention is to provide a steel bar connecting sleeve and a connecting method. The steel bar connecting sleeve has a simple structure, convenient preparation and processing, high efficiency, and low preparation, construction and installation costs.

A method for connecting steel bars, which uses a steel bar connecting sleeve to connect, and the steel bar connecting sleeve is made of steel or cast iron pipes; one end of the steel bar connecting sleeve is provided with an internal thread, and the inner side of the other end is integrally formed with a ring-shaped The boss, the inner diameter of the boss is smaller than the inner diameter of the steel bar connecting sleeve; it is characterized in that it includes the following steps, and the following steps are carried out in sequence,

Step 1. Selection of steel bar connection sleeve

Select the steel bar connection sleeve according to the situation of the steel bar to be connected. The diameter of the steel bar is smaller than the inner diameter of the boss in the steel bar connection sleeve. Put the steel bar connection sleeve on the steel bar I, wherein the steel bar connection sleeve has an internal thread at one end and the steel bar. The connection end of I is on the same side;

Step 2. Processing of steel bars

The connection end of steel bar I is processed into a steel bar pier head, the diameter of which is larger than the inner diameter of the boss and smaller than the inner diameter of the steel bar connecting sleeve; the end of the steel bar II is thickened, and the external thread is processed on it to form a threaded pier thick The external thread of the thick end of the threaded pier matches the internal thread of the connecting sleeve of the steel bar;

Step 3. Processing of threaded pier thick end

Set the threaded hole at the thick end of the threaded pier, and the threaded hole matches the set bolt;

Step 4. Connect

When the bolt at the end of reinforcement II is in a tightened state, the positions of reinforcement I and reinforcement II are arranged correspondingly, the nut end of the bolt and the reinforcement pier end of reinforcement I reserve a gap, and the bolt is twisted so that the end of the nut is in line with The end of the steel bar head at the end of the steel bar I is close to the end, move the steel bar connecting sleeve on the steel bar I, so that the steel bar head enters the steel bar connecting sleeve and is stuck by the boss, twist the reinforcing bar connecting sleeve, and the steel bar connecting sleeve The inner threaded section of the barrel is screwed into the thick end of the threaded pier and tightened;

Rebar I is connected to Rebar II.

Through the above-mentioned design scheme, the present invention can bring the following beneficial effects: the device and connection method of the present application are convenient in preparation and processing, high in efficiency, low in preparation, construction and installation costs, and reliable in connection. When threaded holes and matching bolts are not provided, a simple and economical steel bar connection method that only requires tension resistance can be provided; when threaded holes and matching bolts are provided, a steel bar connection method that requires tensile and compression requirements can also be provided; because There is no need to move the steel bars, and the gap between the inner diameter of the boss of the steel bar connection sleeve and the steel bar diameter can eliminate part of the installation tolerance, especially suitable for the steel bar connection of prefabricated concrete components and finished steel cage construction and installation.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

Fig. 1 is a schematic longitudinal sectional view of a steel bar connecting sleeve of the present invention.

Fig. 2 is a schematic cross-sectional view of the steel bar connection sleeve of the present invention.

Fig. 3 is the assembly schematic diagram of steel bar I and steel bar connecting sleeve of the present invention.

Fig. 4 is a first schematic diagram of the connection end of the steel bar II of the present invention.

Fig. 5 is a first schematic diagram of steel bar connection in the present invention.

Fig. 6 is a second schematic diagram of the connection end of the steel bar II of the present invention.

Fig. 7 is a schematic diagram of a bolt of the present invention.

Fig. 8 is a schematic diagram of the connection between steel bar II and bolts of the present invention.

Fig. 9 is a second schematic diagram of steel bar connection in the present invention.

Among the figure 1-steel bar connecting sleeve, 11-boss, 2-steel bar I, 3-steel bar pier head, 4-steel bar II, 41-threaded pier thick end, 411-threaded hole, 412-bolt.

detailed description

A steel bar connection sleeve, characterized in that: the steel bar connection sleeve 1 is made of steel or cast iron pipe;

As shown in FIGS. 1 and 2 , one end of the reinforcing bar connecting sleeve 1 is provided with an internal thread, and the other end is integrally formed with an annular boss 11 , the inner diameter of the boss 11 is smaller than that of the reinforcing bar connecting sleeve 1 .

A method for connecting steel bars, as shown in Figures 3 to 5, is characterized in that: adopting the steel bar connection sleeve 1 includes the following steps, and the following steps are carried out in sequence,

Step 1. Selection of steel bar connection sleeve 1

As shown in Figure 3, select the reinforcing bar connecting sleeve 1 according to the situation of the reinforcing bar to be connected, the diameter of the reinforcing bar is smaller than the inner diameter of the boss 11 in the reinforcing bar connecting sleeve 1, and the reinforcing bar connecting sleeve 1 is inserted into the reinforcing bar I2, wherein the reinforcing bar The connecting sleeve 1 has an internal thread end on the same side as the connecting end of the steel bar I2;

Step 2. Processing of steel bars

As shown in Figure 3, the connecting end of the steel bar I2 is processed into a steel bar head 3, and the diameter of the steel bar head 3 is larger than the inner diameter of the boss 11 and smaller than the inner diameter of the steel bar connecting sleeve 1; as shown in Figure 4, the steel bar II4 The end pier is thick, and external threads are processed on it to form a threaded pier thick end 41, and the external thread of the threaded pier thick end 41 matches the internal thread of the steel bar connecting sleeve 1;

Step 3. Connect

As shown in Figure 5, arrange the corresponding positions of steel bar I2 and steel bar II4, move the steel bar connection sleeve 1 on the steel bar I2, make the steel bar pier head 3 enter the steel bar connection sleeve 1 and be stuck by the boss 11, twist the steel bar connection Sleeve 1, screw the internal thread section of the steel bar connection sleeve 1 into the thick end 41 of the threaded pier and tighten it;

The connection between steel bar I2 and steel bar II4 is completed.

A method for connecting steel bars, characterized in that:

Said step 2, processing of steel bar and step 3, connection also include: step, processing of the butt end 41 of the threaded pier,

Step 41 processing of the butt end of the threaded pier

As shown in Figure 6, a threaded hole 411 is provided at the end of the thick end 41 of the threaded pier, as shown in Figures 7 and 8, the threaded hole 411 is matched with a bolt 412;

Step 3. Connect

As shown in Figure 9, when the bolt 412 at the end of the steel bar II4 is in a tightened state, the positions of the steel bar I2 and the steel bar II4 are arranged correspondingly, and a gap is reserved between the nut end of the bolt 412 and the steel bar head 3 of the steel bar I2, Twist the bolt 412 to make the end of the nut close to the end of the steel bar head 3 at the end of the steel bar I2, move the steel bar connection sleeve 1 on the steel bar I2, so that the steel bar head 3 enters the steel bar connection sleeve 1 and is protruded Platform 11 is stuck, twist the steel bar connecting sleeve 1, screw the internal thread section of the steel bar connecting sleeve 1 into the thick end 41 of the threaded pier and tighten it;

The connection between steel bar I2 and steel bar II4 is completed.

Example 1

A method for connecting steel bars, as shown in Figures 3 to 5, is characterized in that: adopting the steel bar connection sleeve 1 includes the following steps, and the following steps are carried out in sequence,

Step 1. Selection of steel bar connection sleeve 1

As shown in Figure 3, select the reinforcing bar connecting sleeve 1 according to the situation of the reinforcing bar to be connected, the diameter of the reinforcing bar is smaller than the inner diameter of the boss 11 in the reinforcing bar connecting sleeve 1, and the reinforcing bar connecting sleeve 1 is inserted into the reinforcing bar I2, wherein the reinforcing bar The connecting sleeve 1 has an internal thread end on the same side as the connecting end of the steel bar I2;

Step 2. Processing of steel bars

As shown in Figure 3, the connecting end of the steel bar I2 is processed into a steel bar head 3, and the diameter of the steel bar head 3 is larger than the inner diameter of the boss 11 and smaller than the inner diameter of the steel bar connecting sleeve 1; as shown in Figure 4, the steel bar II4 The end pier is thick, and external threads are processed on it to form a threaded pier thick end 41, and the external thread of the threaded pier thick end 41 matches the internal thread of the steel bar connecting sleeve 1;

Step 3. Connect

As shown in Figure 5, arrange the corresponding positions of steel bar I2 and steel bar II4, move the steel bar connection sleeve 1 on the steel bar I2, make the steel bar pier head 3 enter the steel bar connection sleeve 1 and be stuck by the boss 11, twist the steel bar connection Sleeve 1, screw the internal thread section of the steel bar connection sleeve 1 into the thick end 41 of the threaded pier and tighten it;

The connection between steel bar I2 and steel bar II4 is completed.

Example 2

A method for connecting steel bars, as shown in Figures 3, 4, and 6 to 9, is characterized in that: using the steel bar connecting sleeve 1 includes the following steps, and the following steps are carried out in sequence,

Step 1. Selection of steel bar connection sleeve 1

As shown in Figure 3, select the reinforcing bar connecting sleeve 1 according to the situation of the reinforcing bar to be connected, the diameter of the reinforcing bar is smaller than the inner diameter of the boss 11 in the reinforcing bar connecting sleeve 1, and the reinforcing bar connecting sleeve 1 is inserted into the reinforcing bar I2, wherein the reinforcing bar The connecting sleeve 1 has an internal thread end on the same side as the connecting end of the steel bar I2;

Step 2. Processing of steel bars

As shown in Figure 3, the connecting end of the steel bar I2 is processed into a steel bar head 3, and the diameter of the steel bar head 3 is larger than the inner diameter of the boss 11 and smaller than the inner diameter of the steel bar connecting sleeve 1; as shown in Figure 4, the steel bar II4 The end pier is thick, and external threads are processed on it to form a threaded pier thick end 41, and the external thread of the threaded pier thick end 41 matches the internal thread of the steel bar connecting sleeve 1;

Step 3. Processing of the butt end 41 of the threaded pier

As shown in Figure 6, a threaded hole 411 is provided at the end of the thick end 41 of the threaded pier, as shown in Figures 7 and 8, the threaded hole 411 is matched with a bolt 412;

Step 4. Connect

As shown in Figure 9, when the bolt 412 at the end of the steel bar II4 is in a tightened state, the positions of the steel bar I2 and the steel bar II4 are arranged correspondingly, and a gap is reserved between the nut end of the bolt 412 and the steel bar head 3 of the steel bar I2, Twist the bolt 412 to make the end of the nut close to the end of the steel bar head 3 at the end of the steel bar I2, move the steel bar connection sleeve 1 on the steel bar I2, so that the steel bar head 3 enters the steel bar connection sleeve 1 and is protruded Platform 11 is stuck, twist the steel bar connecting sleeve 1, screw the internal thread section of the steel bar connecting sleeve 1 into the thick end 41 of the threaded pier and tighten it;

The connection between steel bar I2 and steel bar II4 is completed.

In the steel bar connection method described in Embodiment 1, through the threaded connection between the steel bar connecting sleeve 1 and the thick end 41 of the threaded pier and the clamping action between the boss 11 and the steel bar pier head 3, the steel bar connecting sleeve 1 can effectively transmit the force of the connected steel bar. Tensile force plays the role of tensile force. Since there may be a gap between the two ends of the connecting steel bar, the steel bar connecting sleeve 1 is not threaded with the steel bar I2. The steel bar connecting sleeve 1 cannot effectively transmit pressure and cannot play a role in compressive resistance. The connection structure is simple and convenient, and the cost is low, and it is especially suitable for the connection of steel bars when there is no need for compression resistance.

The steel bar connection method described in embodiment 2 is based on solving the tension effect in embodiment 1, and a threaded hole 411 and a bolt 412 are added, and the end of the nut is connected to the end of the steel bar I2 by twisting the bolt 412. The end of the steel bar head 3 is close to each other, eliminating the gap reserved between the nut end of the bolt 412 and the steel bar head 3 end of the steel bar I2 for the convenience of installation, so that the pressure can be effectively transmitted and the pressure resistance can be achieved. It is suitable for the connection of steel bars with both tensile and compressive requirements.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (1)

1. A connection method for steel bars, using a steel bar connection sleeve to connect, and the steel bar connection sleeve (1) is steel or cast iron pipes; one end of the steel bar connection sleeve (1) is provided with an internal thread, and the other end An annular boss (11) is integrally formed on the inner side of the boss (11), and the inner diameter of the boss (11) is smaller than the inner diameter of the steel bar connection sleeve (1); it is characterized in that: the following steps are included, and the following steps are carried out in sequence, Step 1. Selection of steel bar connection sleeve (1) Select the reinforcing bar connecting sleeve (1) according to the situation of the reinforcing bar to be connected, the diameter of the reinforcing bar is less than the inner diameter of the boss (11) in the reinforcing bar connecting sleeve (1), insert the reinforcing bar connecting sleeve (1) into the reinforcing bar I (2 ), where the end of the steel bar connecting sleeve (1) with internal thread is on the same side as the connecting end of the steel bar I (2); Step 2. Processing of steel bars The connecting end of reinforcing bar I (2) is processed into reinforcing bar pier (3), and the diameter of reinforcing bar pier (3) is greater than the inner diameter of boss (11), less than the inner diameter of reinforcing bar connecting sleeve (1); 4) the end pier is thick, and external threads are processed on it to form a threaded pier butt (41), and the external thread of the threaded pier butt (41) matches the internal thread of the steel bar connecting sleeve (1); Step 3. Processing of the butt end (41) of the threaded pier A threaded hole (411) is provided at the end of the butt end (41) of the threaded pier, and the threaded hole (411) is matched with a bolt (412); Step 4. Connect When the bolt (412) at the end of the reinforcing bar II (4) is in a tightened state, the reinforcing bar I (2) is arranged correspondingly to the position of the reinforcing bar II (4), and the nut end of the bolt (412) is connected to the position of the reinforcing bar I (2) Reserve a gap at the end of the steel bar pier (3), twist the bolt (412) to make the end of the nut close to the end of the steel bar pier (3) at the end of the steel bar I (2), move the steel bar I (2) the steel bar connecting sleeve (1), so that the steel bar pier head (3) enters the steel bar connecting sleeve (1) and is stuck by the boss (11), twists the reinforcing bar connecting sleeve (1), and the reinforcing bar connecting sleeve ( 1) The internal thread section is screwed into the thick end of the threaded pier (41) and tightened; Reinforcement I (2) and reinforcement II (4) are connected.

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