Extrusion device for multiple rows of reinforcing steel bars

Abstract

An extrusion device for multiple rows of reinforcing steel bars comprises two opposite force arms, a connector used for connecting the two force arms and a driver. One end of the driver is fixed to the force arm connecting end on one side, and the other end of the driver is fixed to the force arm connecting end on the other side. The middle parts of the two force arms are rotatably connected with the two ends of the connector respectively, and the driver drives the connecting ends of the two force arms to expand or shrink, so that the extrusion ends of the two force arms approach or leave; a guide groove is formed in the extrusion end of the force arm, and steel bars needing to be connected are guided into the guide groove. The thickness of the guide groove is smaller than the distance between two adjacent columns of steel bars needing to be connected, and the length of the guide groove is larger than the distance between two or more adjacent pairs of steel bars of the same column of steel bars. The extrusion end of the extrusion device can extend into two or more pairs of adjacent steel bars in the same column, so that the extrusion device can be used for connecting multiple rows and columns of steel bars.

Description

Technical Field

[0001] The invention relates to a device used for connecting steel bars in a building structure. Background Art

[0002] The existing mechanical threaded connection of steel bars in building structures includes tapered thread connection, upset straight thread connection and rolled straight thread connection. The two steel bars to be connected are processed by special equipment, and steel wire heads with corresponding threads are made at the ends of the two steel bars. Then, the two steel bars are connected by a connecting sleeve with corresponding internal threads to achieve the steel bar connection. When connecting, the connecting sleeve needs to be screwed into a steel wire head first, and then the other steel bar is screwed into the sleeve and tightened to connect the two steel bars and transmit force. During the connection process, at least one steel bar needs to rotate and move axially. Therefore, the existing steel bar connection method is only suitable for single steel bar connection.

[0003] With the development of the construction industry and the continuous improvement of construction technology, componentized steel bar construction is gradually adopted in construction. That is, before the steel bar connection construction, multiple steel bars are made into an integral steel mesh and steel cage, and then the steel bar components are connected as a whole. In this kind of steel bar component connection construction, the steel bar can only move axially, cannot rotate, and cannot move locally. Therefore, the overall connection of steel bar components cannot be achieved using the existing steel bar connection method. For example, in the existing prefabricated building technology, since the exposed steel bars of the components cannot rotate, the existing steel bar mechanical connection technology cannot achieve steel bar connection. The steel bar connection between the components in the prefabricated building can only be carried out by grouting sleeves. The grouting sleeves are expensive, the construction process is cumbersome and complicated, the quality of the grouting construction directly affects the quality of the project, and the quality of the steel bar connection is difficult to guarantee.

[0004] In existing building structures, there are often multiple rows and columns of steel bars, and the distance between rows is small. When they need to be connected, they are blocked by the multiple rows and columns of steel bars, so that ordinary extrusion devices used for single-row steel bars cannot extend into the steel bars. Therefore, ordinary extrusion devices cannot be used for steel bar connection. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the above-mentioned deficiencies of the prior art and provide an extrusion device for multiple rows of steel bars, which can be used in connecting multiple rows and columns of steel bars.

[0006] The technical solution adopted by the present invention to solve the above problems is: A squeezing device for multiple rows of steel bars, characterized in that it comprises two opposing force arms, a connector for connecting the two force arms, and a driver; one end of the driver is fixed to the connecting end of the force arm on one side, and the other end of the driver is fixed to the connecting end of the force arm on the other side; the middle parts of the two force arms are rotatably connected to the two ends of the connector respectively, and the connecting ends of the two force arms are driven by the driver to expand or shrink, so that the squeezing ends of the two force arms are close to or away from each other; a guide groove is provided at the squeezing end of the force arm to guide the steel bars to be connected into the guide groove; the thickness of the guide groove is less than the spacing between two adjacent rows of steel bars to be connected, and the length of the guide groove is greater than the distance between two adjacent pairs or more pairs of steel bars in the same row.

[0007] Preferably, a U-shaped mold is arranged inside the extrusion end, and the U-shaped mold limits the sleeve of the steel bar connection assembly, which enables better extrusion.

[0008] More specifically, the driver is a hydraulic cylinder, the outer end of the piston rod of the hydraulic cylinder is fixed to the lever arm connecting end on one side by a fixing pin, and the other end of the hydraulic cylinder is fixed to the lever arm connecting end on the other side by a fixing pin.

[0009] More specifically, a groove is set at the connecting end of each lever arm, the outer end of the piston rod is connected to a fixing plate, the fixing plate is placed in the groove of the lever arm on one side and fixed by a fixing pin, and another fixing plate is fixed to the other end of the hydraulic cylinder, the other fixing plate is placed in the groove of the lever arm on the other side and fixed by a fixing pin.

[0010] Preferably, the guide groove of the extrusion end is U-shaped.

[0011] Preferably, the connector for connecting the two lever arms is two connecting plates, and the two sides of the middle part of the two lever arms are respectively fixed to the ends of the two connecting plates by connecting pins. Each lever arm can rotate around the connecting pin, and the connecting ends of the two lever arms are driven to expand or shrink by the piston rod of the hydraulic cylinder, so that the extrusion ends of the two lever arms are close to or away from each other.

[0012] Preferably, it also includes a lifting ring fixed at the middle of the two force arms, through which the extrusion device is lifted to facilitate the operator to operate more conveniently.

[0013] Preferably, it further comprises a gear which is rotatably fixed between the two connecting plates, the two gears are meshed with each other and can rotate along with the rotation of the force arm, thereby increasing the supporting force between the two force arms.

[0014] Compared with the prior art, the advantages of the present invention are: since the thickness of the guide groove of the force arm is smaller than the spacing between two adjacent rows of steel bars to be connected, and the length of the guide groove is greater than the distance between two adjacent pairs or more than two pairs of steel bars in the same row, the extrusion end of the extrusion device can extend into two adjacent pairs or more than two pairs of steel bars in the same row, thereby being able to be used in the connection of multiple rows and columns of steel bars. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of an extrusion device for multiple rows of steel bars according to an embodiment of the present invention.

[0016] Figure 2 It is a front view of an extrusion device for multiple rows of steel bars according to an embodiment of the present invention.

[0017] Figure 3 The present invention is a side view of an outer sleeve of an extrusion device for multiple rows of steel bars according to an embodiment of the present invention.

[0018] Figure 4 It is a bottom view of an extrusion device for multiple rows of steel bars according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] like Figure 1-4 As shown, a squeezing device for multiple rows of steel bars includes two lever arms 1 with the same structure, a connecting plate 2 for connecting the two lever arms 1, and a hydraulic cylinder 3.

[0021] The hydraulic cylinder 3 is provided with an oil inlet 31 and an oil return port 32 , and the oil inlet 31 and the oil return port 32 are connected to an external hydraulic system, and a reciprocating force is provided to the hydraulic cylinder 3 through the hydraulic system.

[0022] The outer end of the piston rod of the hydraulic cylinder 3 is fixed to the connecting end of the force arm 1 on one side through a fixing pin, and the other end of the hydraulic cylinder 3 is fixed to the connecting end of the force arm 1 on the other side through a fixing pin 6.

[0023] More specifically, the two force arms 1 are opposite to each other, a U-shaped groove 12 is set at the connecting end of each force arm 1, the outer end of the piston rod 33 is connected to the fixing plate 35, the fixing plate 35 is placed in the U-shaped groove 12 of the force arm 1 on one side and fixed by the fixing pin 6, and the other end of the hydraulic cylinder 3 is fixed with another fixing plate 34, the other fixing plate 34 is placed in the U-shaped groove 12 of the force arm 1 on the other side and fixed by the fixing pin 6.

[0024] The extrusion end 14 of the lever arm 1 is provided with a U-shaped guide groove 13 to guide the steel bars to be connected into the U-shaped guide groove 13 .

[0025] The thickness T of the U-shaped guide groove 13 is smaller than the spacing between two adjacent rows of steel bars to be connected, and the length L of the U-shaped guide groove 13 is larger than the distance between two adjacent pairs or more than two pairs of steel bars in the same row. Therefore, the extrusion end 14 of the extrusion device can extend into two adjacent pairs or more than two pairs of steel bars in the same row.

[0026] A U-shaped mold is arranged inside the extrusion end 14, and the U-shape of the U-shaped mold is consistent with the U-shape of the U-shaped guide groove 13, allowing the steel bar to enter. The U-shaped mold is aligned with the sleeve of the connection component to be connected, so that the sleeve is positioned and moves with the extrusion end.

[0027] The two sides of the middle part of the two force arms 1 are respectively fixed to the ends of the two connecting plates 2 through connecting pins 7, thereby connecting the two force arms 1 together. As a result, each force arm 1 can rotate around the connecting pin 7, and the piston rod of the hydraulic cylinder drives the connecting ends of the two force arms to expand or shrink, so that the extrusion ends 14 of the two force arms 1 are close to or away from each other.

[0028] It also includes a lifting ring 8, which is fixed at the middle of the two force arms 1. The extrusion device is lifted by the lifting ring 8, so that the operator can operate it more conveniently.

[0029] It also includes a gear 4, which is fixed between the connecting plates 4 on both sides by a fixing pin 9 and can rotate around the fixing pin 9. The two gears 4 are meshed and can rotate with the rotation of the force arm, thereby increasing the supporting force between the two force arms 1.

[0030] like Figure 4 As shown, when in use, first install the steel bar connection assembly in the upper and lower steel bars of the same column or row that need to be connected, the upper steel bar is connected to the upper sleeve, the lower steel bar is connected to the lower sleeve, and a connecting sleeve is arranged between the upper sleeve and the lower sleeve. Then, the U-shaped guide grooves 13 of the two force arms 1 of the extrusion device for multiple rows of steel bars are respectively extended into the upper steel bar and the lower steel bar, and the molds 5 on the upper steel bar and the lower steel bar are respectively aligned with the upper sleeve and the lower sleeve. Then, the hydraulic system is turned on to deliver hydraulic oil to the oil inlet 31 of the hydraulic cylinder 3, so that the piston of the hydraulic cylinder 3 is extended. This drives the connecting end of the lever arm 1 connected thereto to open, thereby reducing the spacing between the extrusion ends 14 of the lever arm 1, thereby squeezing the upper sleeve and the lower sleeve to move toward each other, squeezing the connecting sleeve onto the steel bar, thereby connecting the upper steel bar and the lower steel bar together; after the upper and lower steel bars are connected, the hydraulic system delivers hydraulic oil to the return oil port 32 of the hydraulic cylinder 3 in the reverse direction, causing the piston rod to retract inward, thereby reducing the spacing between the connecting ends of the two lever arms, and correspondingly increasing the spacing between the extrusion ends 14 of the two lever arms, thereby causing the extrusion device to leave the steel bar connection assembly.

[0031] Since the thickness T of the U-shaped guide groove 13 is less than the spacing between two adjacent rows of steel bars to be connected, and the length L is greater than the distance between two or more adjacent pairs of steel bars in the same row, the extrusion end of the extrusion device extends into two or more adjacent pairs of steel bars in the same row, and then the inner pair of steel bars is connected first, and then the outer pair of steel bars is connected according to the above connection process. Alternatively, multiple pairs of steel bars are connected at the same time.

[0032] The steel bar connection assembly is relatively common, and may be the steel bar connection assembly disclosed by the applicant in Chinese patent document CN222227743U, or the steel bar extrusion connection sleeve assembly disclosed in CN115233908A, etc., which need not be described in detail here.

Claims

1. A device for extruding multiple rows of steel bars, characterized in that: It comprises two opposing force arms, a connector for connecting the two force arms, and a driver; one end of the driver is fixed to the connecting end of the force arm on one side, and the other end of the driver is fixed to the connecting end of the force arm on the other side; the middle parts of the two force arms are rotatably connected to the two ends of the connector respectively, and the driver drives the connecting ends of the two force arms to expand or shrink, so that the extrusion ends of the two force arms approach or leave; A guide groove is provided at the extrusion end of the force arm to guide the steel bars to be connected into the guide groove; the thickness of the guide groove is less than the spacing between two adjacent rows of steel bars to be connected, and the length of the guide groove is greater than the distance between two or more adjacent pairs of steel bars in the same row.

2. The extrusion device for multiple rows of steel bars according to claim 1, characterized in that: A U-shaped die is arranged inside the extrusion end, and the U-shaped die limits the sleeve of the steel bar connection assembly.

3. The extrusion device for multiple rows of steel bars according to claim 1, characterized in that: The driver is a hydraulic cylinder, the outer end of the piston rod of the hydraulic cylinder is fixed to the lever arm connecting end on one side through a fixing pin, and the other end of the hydraulic cylinder is fixed to the lever arm connecting end on the other side through a fixing pin.

4. The extrusion device for multiple rows of steel bars according to claim 3, characterized in that: A groove is set at the connecting end of each force arm, and the outer end of the piston rod is connected to a fixing plate, which is placed in the groove of one side force arm and fixed by a fixing pin. Another fixing plate is fixed to the other end of the hydraulic cylinder, and the other fixing plate is placed in the groove of the other side force arm and fixed by a fixing pin.

5. The extrusion device for multiple rows of steel bars according to claim 1, characterized in that: The guide groove of the extrusion end is U-shaped.

6. The extrusion device for multiple rows of steel bars according to claim 1, characterized in that: The connector used to connect the two force arms is two connecting plates. The two sides of the middle part of the two force arms are respectively fixed to the ends of the two connecting plates through connecting pins. Each force arm can rotate around the connecting pin. The piston rod of the hydraulic cylinder drives the connecting ends of the two force arms to expand or shrink, so that the extrusion ends of the two force arms are close to or away from each other.

7. The extrusion device for multiple rows of steel bars according to claim 1, characterized in that: It also includes a lifting ring, which is fixed at the middle of the two force arms, and the extrusion device is lifted by the lifting ring.

8. The extrusion device for multiple rows of steel bars according to claim 1, characterized in that: It also includes a gear which is rotatably fixed between the two connecting plates. The two gears are meshed and can rotate along with the rotation of the force arm.

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