Prestress intelligent tensioning device

Abstract

The utility model discloses a prestress intelligent tensioning device which comprises two tensioning jacks, the two tensioning jacks are located and installed at the two ends of a bridge respectively, tensioning anchorage devices are installed at the outer ends of the tensioning jacks, and sensors used for collecting tensioning force and tensioning displacement of the tensioning jacks are arranged on the tensioning jacks. The main machine is connected with an auxiliary machine through a data line, and the main machine and the auxiliary machine are in control connection with the two tensioning jacks respectively; and the alarm is positioned and installed on one side of the main machine and connected with the main machine through a data line, and when the tensioning data is abnormal, the alarm works to give out early warning. The tensioning device has the advantages that early warning can be performed in time when one end is abnormal in tensioning during tensioning, and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of prestressed tensioning, in particular to a prestressed intelligent tensioning device. Background Art

[0002] Prestressing is to add tension to the components in advance, so that the prestressed components are subjected to compressive stress, and then cause them to produce certain deformations to cope with the loads on the structure itself. Currently, there are manual, semi-automatic, and intelligent fully automatic prestressing equipment on the market. Intelligent prestressing equipment is gradually replacing old manual and semi-automatic equipment in construction. Traditional tensioning construction uses shouting, sign language, or walkie-talkies to achieve collaborative operation when symmetrical and synchronous tensioning at both ends or multiple points is required. This results in an abnormal tensioning at one end due to unknown reasons during double-end tensioning, while the other end continues to tension, causing the elongation error to continue to increase. Manual operation based solely on experience by construction personnel has a high error rate and cannot guarantee the quality of prestressed construction. Utility Model Content

[0003] In order to solve the above problems existing in the prior art, a prestressed intelligent tensioning device is provided.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] The utility model proposes a prestressed intelligent tensioning device, comprising two tensioning jacks, the two tensioning jacks are respectively positioned and installed at two ends of a bridge, tensioning anchors are installed at the outer ends of the tensioning jacks, and sensors for collecting the tensioning force and tensioning displacement of the tensioning jacks are arranged on the tensioning jacks; a main machine, the main machine is connected to an auxiliary machine through a data line, the main machine and the auxiliary machine respectively control and connect the two tensioning jacks; an alarm, the alarm is positioned and installed on one side of the main machine, and is connected to the main machine through a data line, and when the tensioning data is abnormal, the alarm works to issue a warning.

[0006] Preferably, the host is set with various types of elongation values ​​reaching the yield value of steel strands, and the elongation values ​​of the yield value of steel strands and the theoretical elongation of steel strands are used as reference values ​​of the protection system to form a primary protection system; the primary protection system and the alarm together form a secondary protection system.

[0007] Preferably, the main machine and auxiliary machine also have a main machine screen and an auxiliary machine screen respectively, and also include a remote monitoring device for monitoring the tensioning of the steel strands. When an abnormality occurs during the tensioning process of the steel strands, it is displayed on the main machine screen and the auxiliary machine screen in a timely manner.

[0008] Preferably, it also includes an auxiliary oil cylinder, which is used to assist in oil return during tensioning and also plays a role in stabilizing pressure.

[0009] Preferably, the tensioning anchor comprises a limiting plate, a tool anchor is provided on one side of the limiting plate, and a tool clip is mounted on the tool anchor; both the limiting plate and the tool anchor are provided with through holes for the steel strand to pass through.

[0010] Preferably, it further comprises a hydraulic pump station arranged on one side of the tensioning jack, and the hydraulic pump station is connected to the tensioning jack through a high-pressure oil pipe.

[0011] Preferably, a protective mesh is further provided on one side of the tensioning jack, and the protective mesh is made of steel plate. A layer of wooden board is connected to the rear of the steel plate, and the thickness of the wooden board is three centimeters.

[0012] Preferably, a grouting machine is also provided on one side of the tensioning device, the grouting machine is connected to a grouting pipe, and the grouting pipe is provided with a control valve for controlling the opening and closing of the grouting pipe; the control valve is connected to the host through a data line.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The utility model controls two tensioning jacks respectively through the main machine and the auxiliary machine. At the same time, the main machine and the auxiliary machine are connected by a data line to realize real-time sharing of data and operations. The data line also plays the role of transmitting alarm signals. The alarm is arranged on one side of the main machine, which can ensure both single-end tensioning error alarm and double-end tensioning precise control and alarm. When abnormal tensioning occurs, early warning is issued in time to improve safety.

[0015] 2. The utility model also forms a primary protection system by setting the elongation of each type of steel strand reaching the yield value in the main unit. The elongation of the steel strand yield value and the theoretical elongation of the steel strand are used as reference values ​​of the protection system. The primary protection system and the alarm form a secondary protection system to further improve safety.

[0016] 3. The utility model also provides a grouting machine on one side of the tensioning device, the grouting machine is connected to a grouting pipeline, and the grouting pipeline is provided with a control valve for controlling the opening and closing of the grouting pipeline; the control valve is connected to the host through a data line, realizing "one machine with multiple controls". The tensioning device and the grouting machine system are combined in modules. After tensioning, the host controls the grouting valve to grout in time, and controls the 48h time difference between tensioning completion and grouting, thereby improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the connection relationship between the main engine and the tensioning jack;

[0020] Figure 3 It is a schematic diagram of the tension anchor;

[0021] Figure 4 This is a schematic diagram of the connection between the host and the grouting machine;

[0022] Figure 5 This is a schematic diagram of the protective mesh in use.

[0023] Description of reference numerals:

[0024] 1. Main machine; 2. Auxiliary machine; 3. Tensioning jack; 4. Tensioning anchor; 5. Alarm; 6. Data cable; 7. Main machine screen; 8. Auxiliary machine screen; 9. Limit plate; 10. Tool anchor; 11. Tool clip; 12. Spiral reinforcement; 13. Grouting machine; 14. Control valve; 15. Grouting pipe; 16. Steel strand; 17. Beam; 18. Protective mesh. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] Introduction of tensioning process:

[0027] 1. Preparatory work; 2. Insertion of prestressed tendons; 3. Installation of tensioning anchors and tensioning equipment; 4. Grouting after tensioning; 5. End sealing.

[0028] Embodiment 1

[0029] like Figure 1-4A prestressed intelligent tensioning device is shown, comprising two tensioning jacks 3, which are respectively positioned and installed at both ends of the bridge, and tensioning anchors 4 are installed at the outer ends of the tensioning jacks 3. Sensors for collecting the tensioning force and tensioning displacement of the tensioning jacks 3 are arranged on the tensioning jacks 3, and the sensors include pressure sensors and displacement sensors. The pressure sensor is responsible for collecting the pressure value of the oil cylinder of the tensioning jacks 3 during the tensioning process, and converting it into a tension value according to calibration parameters. The displacement sensor 8 is responsible for collecting the elongation (including retraction) value of the steel strand 16 during the tensioning process; a main machine 1, the main machine 1 is connected to an auxiliary machine 2 through a data line 6, and the main machine 1 and the auxiliary machine 2 are respectively controlled and connected to the two tensioning jacks 3; an alarm 5, the alarm 5 is positioned and installed on one side of the main machine 1, and is connected to the main machine 1 through a data line 6. When the tensioning data is abnormal, the alarm will work to issue an early warning, and the early warning will be issued in time to prompt the construction personnel and the monitoring personnel to find the problem. It also includes a hydraulic pump station arranged on one side of the tensioning jack 3 . The hydraulic pump station is connected to the tensioning jack 3 through a high-pressure oil pipe, and the hydraulic pump station supplies oil to the tensioning jack 3 .

[0030] The host 1 is set with various types of elongations reaching the yield value of the steel strand 16. The elongation of the yield value of the steel strand 16 and the theoretical elongation of the steel strand 16 are used as reference values ​​of the protection system to form a primary protection system, retaining a certain safety factor, and automatically stopping the tensioning before the yield strength of the steel strand 16 is reached during tensioning; the primary protection system and the alarm 5 together form a secondary protection system to achieve multi-level prevention and control, reduce the occurrence of accidents, and improve construction quality and safety.

[0031] The main machine 1 and the auxiliary machine 2 also have a main machine screen 7 and an auxiliary machine screen 8 respectively, and also include a remote monitoring device for monitoring the tensioning of the steel strand 16. When an abnormality occurs during the tensioning process of the steel strand 16, it is promptly displayed on the main machine screen 7 and the auxiliary machine screen 8. The main machine 1 and the auxiliary machine 2 are connected through a data line 6, which realizes data sharing and increases the remote monitoring device to support multiple people to monitor and improve safety. It also includes an auxiliary oil cylinder, which is located outside the tensioning jack 3 and is connected to the control of the main machine 1 or the auxiliary machine 2. The auxiliary oil cylinder is used to assist in oil return during tensioning and also plays a role in voltage stabilization.

[0032] The tensioning anchor 4 includes a limit plate 9, one side of which is provided with a tool anchor 10, and the tool anchor 10 is equipped with a tool clip 11; both the limit plate 9 and the tool anchor 10 are provided with through holes for the steel strand 16 to pass through, and also include spiral ribs 12 for improving the compressive strength.

[0033] When the concrete strength of the beam body reaches the design standard, the steel strand 16 is threaded, and then the limit plate 9, tool anchor 10, and tool clip 11 are installed in sequence. After the anchor is installed, tensioning is performed according to the design requirements through the preset program of the host 1. The prestressing is minimized during the tensioning process. The intelligent tensioning control system should be able to eliminate the influence of external factors. The prestressing loss during the tensioning of multiple curved prestressed bundles is reduced through the intelligent control system. The working pressure of the tensioning jack 3 and the elongation (including retraction) of the steel strand 16 and other data are collected through sensors. According to the tensioning force, yield elongation, and theoretical elongation, three controls are performed and corresponding records are made; then the channel is grouting and end sealing is performed.

[0034] It can be seen from this embodiment that the two tensioning jacks 3 are controlled respectively by the main machine 1 and the auxiliary machine 2. At the same time, the main machine 1 and the auxiliary machine 2 are connected by a data line 6 to realize real-time sharing of data and operations, facilitate accurate tensioning and real-time verification of data, and improve construction quality. The data line 6 also plays the role of transmitting alarm signals. The alarm 5 is arranged on one side of the main machine 1, which can ensure single-end tensioning error alarm, as well as double-end tensioning precise control and alarm. When tensioning abnormalities occur, early warning is issued in time to improve safety.

[0035] Embodiment 2

[0036] Continue to refer to the attached Figure 1-5 A protective mesh 18 is also provided on one side of the tension jack 3. The protective mesh 18 is made of steel plate. A layer of wooden board is connected behind the steel plate. The thickness of the wooden board is three centimeters. Warning signs are posted on the outer wall of the wooden board to further remind the surrounding personnel. The protective strength of the protective mesh 18 is ensured to prevent the steel strand 16 from collapsing and causing harm to the construction personnel and the on-site personnel. When in use, the protective mesh 18 is fixedly installed on the ground and is located on the outside of both ends of the bridge.

[0037] A grouting machine 12 is also provided on one side of the tensioning device, and a grouting pipe 15 is connected to the grouting machine 12, and a control valve 14 for controlling the opening and closing of the grouting pipe 15 is provided on the grouting pipe 15; the control valve 14 is connected to the host 1 through the data line 6. A threaded hole is provided on the side wall of the host 1, and an external thread is provided at the end of the data line 6 to prevent tensioning errors caused by the detachment of the data line 6.

[0038] After tensioning is completed and the grouting channel is inspected, the control valve 14 is opened through the main machine 1, so that grouting is completed through the grouting machine 12 and the grouting pipe 15, and then the end of the beam is blocked. "One machine with multiple controls" is realized. The tensioning machine and the grouting machine 12 are combined in modules. After tensioning, the tensioning device opens and closes the control valve 14 to grout in time, and controls the time difference of 48 hours between tensioning and grouting. At the same time, grouting can also realize intelligent detection of the fluidity of the slurry in each time period, and can also control the grouting process and standards.

[0039] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A prestressed intelligent tensioning device, characterized in that: include: Two tensioning jacks (3), the two tensioning jacks (3) are respectively positioned and installed at two ends of the bridge, tensioning anchors (4) are installed at the outer ends of the tensioning jacks (3), and sensors for collecting tensioning force and tensioning displacement of the tensioning jacks (3) are arranged on the tensioning jacks (3); A host (1), the host (1) being connected to an auxiliary machine (2) via a data line (6), the host (1) and the auxiliary machine (2) respectively controlling the connection between the two tensioning jacks (3); An alarm (5) is positioned and installed on one side of the host (1) and is connected to the host (1) via a data line (6). When the tensioning data is abnormal, the alarm (5) operates to issue an early warning.

2. A prestressed intelligent tensioning device according to claim 1, characterized in that: The host machine (1) and the auxiliary machine (2) also respectively have a host machine screen (7) and an auxiliary machine screen (8), and also include a remote monitoring device for monitoring the tensioning of the steel strands. When an abnormality occurs during the tensioning of the steel strands, it is promptly displayed on the host machine screen (7) and the auxiliary machine screen (8).

3. A prestressed intelligent tensioning device according to claim 2, characterized in that: The tensioning anchor (4) comprises a limiting plate (9), a tool anchor (10) is provided on one side of the limiting plate (9), and a tool clip (11) is mounted on the tool anchor (10); both the limiting plate (9) and the tool anchor (10) are provided with through holes for the steel strand to pass through.

4. The prestressed intelligent tensioning device according to claim 1, characterized in that: It also comprises a hydraulic pump station arranged on one side of the tensioning jack (3), and the hydraulic pump station is connected to the tensioning jack (3) via a high-pressure oil pipe.

5. The prestressed intelligent tensioning device according to claim 1, characterized in that: A protective mesh (18) is also provided on one side of the tensioning jack (3), and the protective mesh (18) is made of steel plate.

6. The prestressed intelligent tensioning device according to claim 1, characterized in that: A grouting machine (12) is also provided on one side of the tensioning device. The grouting machine (12) is connected to a grouting pipeline (15). The grouting pipeline (15) is provided with a control valve (14) for controlling the opening and closing of the grouting pipeline (15); the control valve (14) is connected to the host (1) via a data line (6).

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