A prestressed cable pre-tensioning and calibration integrated device

Abstract

The application discloses a prestressed cable pre-tensioning and calibration integrated device, and relates to the technical field of prestressed cable pre-tensioning. The application discloses a rigid beam, and fixing members and tensioning members fixedly installed at both ends of the rigid beam; the fixing member comprises a first fixing plate, and a first tensioning plate is fixed to the top of the first fixing plate; a first joint hole is arranged on the first tensioning plate, and a first cable joint is connected in the first joint hole; a second tensioning plate is installed on the tensioning member, a second joint hole is arranged on the second tensioning plate, and a second cable joint is connected in the second joint hole; one end of the first cable joint is connected with a force sensor, one end of the force sensor is connected with a basket bolt, one end of the basket bolt is connected with a prestressed cable, and the other end of the prestressed cable is connected with the second cable joint. The device is simple to process, low in cost, and high in functionality, and can simultaneously realize pre-tensioning of the prestressed cable and determination of the elastic modulus.

Description

Technical Field

[0001] This invention relates to the field of prestressed cable pretensioning technology, specifically to an integrated device for prestressed cable pretensioning and calibration. Background Technology

[0002] With the large-scale construction of long-span structures in the country, prestressed cables have been extensively developed and applied. In order to ensure that prestressed cables can play a full role in use, pre-tensioning is required before tensioning the prestress. At the same time, it is also very important to measure the elastic modulus of the prestressed cables.

[0003] Existing prestressed cable pretensioning devices typically use jacks, anchors, and clamps to pretension the cable members. However, these devices cannot effectively measure the magnitude of the prestressing force or the deformation of the prestressed cable during the tensioning process, and therefore cannot effectively obtain the elastic modulus of the prestressed cable. Existing elastic modulus measuring devices generally use tensile testing machines to measure the elastic modulus of prestressed cables. However, these devices have disadvantages such as large machine size, high requirements for the operating environment, complex operation procedures, and high measurement costs, and cannot meet the needs of some engineering applications.

[0004] Existing devices cannot provide integrated functions for prestressed cable pretensioning and elastic modulus measurement. Therefore, it is of great significance to study an integrated device that can simply and conveniently realize the prestressed cable pretensioning process and measure its elastic modulus. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated device for prestressed cable pretensioning and calibration, in order to solve the problem mentioned in the background art: existing devices cannot provide integrated functions for prestressed cable pretensioning and elastic modulus measurement.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A prestressed cable pretensioning and calibration integrated device, comprising:

[0008] Rigid beams, and fasteners and tensioning members fixedly installed at both ends of the rigid beams;

[0009] The fastener includes a first fixing plate, and a first tension plate is fixed to the top of the first fixing plate;

[0010] The first tension plate is provided with a first joint hole, and a first cable connector is connected inside the first joint hole;

[0011] A second tensioning plate is installed on the tensioning member, and a second joint hole is provided on the second tensioning plate. A second cable connector is connected inside the second joint hole.

[0012] One end of the first cable connector is connected to a force sensor, one end of the force sensor is connected to a turnbuckle, one end of the turnbuckle is connected to a prestressed cable, and the other end of the prestressed cable is connected to the second cable connector.

[0013] Furthermore, the first fixing plate is a steel plate with bolt holes, and the first fixing plate is fixed to the rigid beam by bolts.

[0014] Furthermore, the tensioning member includes a second fixing plate, and two parallel limiting plates and a baffle are welded to the top of the second fixing plate, with the baffle welded to one side of the limiting plate;

[0015] A slot is provided between the two limiting plates, and the second tension plate is slidably connected inside the slot;

[0016] A screw is welded to one side of the second tension plate, and a bolt hole is provided on the baffle for the screw to pass through. A nut is also threaded to one end of the screw that passes through the bolt hole.

[0017] Furthermore, the second fixing plate is a steel plate with bolt holes; the second fixing plate is fixed to the rigid beam by bolts.

[0018] Furthermore, a displacement gauge is also installed between the first fixing plate and the second tensioning plate.

[0019] Furthermore, the tensioning member includes a second fixing plate, and the top of the second fixing plate is welded with the second tensioning plate.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The device of the present invention is simple to process and inexpensive, but highly functional, and can simultaneously realize the pre-tensioning of prestressed cables and the determination of their elastic modulus;

[0022] 2. Regarding the installation of the present invention, the device is easy to install and can be fully operated by a single person; at the same time, the device itself is detachable, which can well meet the needs of secondary installation.

[0023] 3. In terms of the use of this invention, the device is easy to operate and learn; it does not require the assistance of external machinery and can be operated manually. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the prestressed cable pretensioning-calibration integrated device of Example 1;

[0025] Figure 2 This is a schematic diagram of the fastener in Embodiment 1;

[0026] Figure 3 This is a schematic diagram of the tensioning component in Example 1;

[0027] Figure 4 This is a schematic diagram of the prestressed cable pretensioning-calibration integrated device of Example 2.

[0028] Reference numerals: 1-Fixed component; 101-First fixing plate; 102-First tensioning plate; 103-First cable joint; 104-Force sensor; 105-Turn bolt; 106-Prestressed cable; 107-Displacement gauge; 2-Tensioning component; 201-Second fixing plate; 202-Limiting plate; 203-Baffle; 204-Second tensioning plate; 205-Screw; 206-Nut; 207-Second cable joint; 3-Rigid beam. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] This invention is an integrated device for prestressed cable pretensioning and calibration.

[0031] Example 1

[0032] Please see Figure 1 This embodiment discloses an integrated device for prestressed cable pretensioning and calibration.

[0033] Specifically, it includes a rigid beam 3, and fasteners 1 and tensioning members 2 installed at both ends of the rigid beam 3. The rigid beam 3 is a rigid structure.

[0034] Please see Figure 2 The fastener 1 includes a first fixing plate 101, and a first tension plate 102 is welded to the top of the first fixing plate 101.

[0035] In one specific embodiment, the first fixing plate 101 is a steel plate with bolt holes, and the first fixing plate 101 is fixed to the rigid beam 3 by bolts.

[0036] The first tension plate 102 is provided with a first joint hole, and a first cable connector 103 is connected inside the first joint hole;

[0037] See Figure 3The tensioning member 2 includes a second fixing plate 201. Two parallel limiting plates 202 and a baffle 203 are welded to the top of the second fixing plate 201. The baffle 203 is welded to one side of the limiting plate 202.

[0038] A slot is provided between the two limiting plates 202, and a second tension plate 204 is slidably connected inside the slot; a second connector hole is provided on the second tension plate 204, and a second cable connector 207 is connected inside the second connector hole.

[0039] A screw 205 is welded to one side of the second tension plate 204. A bolt hole is provided on the baffle 203 for the screw 205 to pass through. A nut 206 is threadedly connected to one end of the screw 205 that passes through the bolt hole.

[0040] In one specific embodiment, the second fixing plate 201 is a steel plate with bolt holes; the second fixing plate 201 is fixed to the rigid beam 3 by bolts.

[0041] One end of the first cable joint 103 is connected to a force sensor 104, one end of the force sensor 104 is connected to a turnbuckle 105, one end of the turnbuckle 105 is connected to a prestressed cable 106, and the other end of the prestressed cable 106 is connected to a second cable joint 207. The turnbuckle 105 can be used to apply a tension load to the prestressed cable 106.

[0042] A displacement gauge 107 is also installed between the first fixing plate 101 and the second tensioning plate 204.

[0043] Based on the above, we can conclude that:

[0044] After the prestressed cable 106 is installed on this device, a tension load can be applied to the prestressed cable 106 by tightening the bolt on the screw 205, or by adjusting the turnbuckle 105. The force sensor 104 can obtain the prestress value applied to the prestressed cable 106 at this moment, and the displacement gauge 107 can obtain the length change value of the prestressed cable 106. From this, the elastic modulus of the cable can be calculated.

[0045] Example 2

[0046] See Figure 4 This embodiment discloses an integrated device for prestressed cable pretensioning and calibration.

[0047] The only difference between this embodiment and Embodiment 1 above is the structure of the tensioning member 2.

[0048] In this embodiment, the tensioning member 2 includes a second fixing plate 201, a second tensioning plate 204 is welded to the top of the second fixing plate 201, a second joint hole is provided on the second tensioning plate 204, and a second cable joint 207 is connected inside the second joint hole.

[0049] Obviously, compared with Embodiment 1, this embodiment removes the function of applying tension load to the prestressed cable 106 by tightening the bolt on the screw 205, and only retains the function of applying tension load to the prestressed cable 106 by the turnbuckle 105.

[0050] Based on the settings of the two embodiments described above, it can be seen that:

[0051] 1. The device of the present invention is simple to process and inexpensive, but highly functional, and can simultaneously realize the pre-tensioning of prestressed cables and the determination of their elastic modulus;

[0052] 2. Regarding the installation of the present invention, the device is easy to install and can be fully operated by a single person; at the same time, the device itself is detachable, which can well meet the needs of secondary installation.

[0053] 3. In terms of the use of this invention, the device is easy to operate and learn; it does not require the assistance of external machinery and can be operated manually.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated device for prestressed cable pretensioning and calibration, characterized in that, include: Rigid beam (3), and fasteners (1) and tensioners (2) fixedly installed at both ends of rigid beam (3); The fastener (1) includes a first fixing plate (101), and a first tension plate (102) is fixed to the top of the first fixing plate (101). The first tension plate (102) is provided with a first joint hole, and a first cable connector (103) is connected inside the first joint hole. A second tension plate (204) is installed on the tensioning member (2), and a second joint hole is provided on the second tension plate (204). A second cable joint (207) is connected inside the second joint hole. One end of the first cable connector (103) is connected to a force sensor (104), one end of the force sensor (104) is connected to a turnbuckle (105), one end of the turnbuckle (105) is connected to a prestressed cable (106), and the other end of the prestressed cable (106) is connected to the second cable connector (207). The tensioning member (2) includes a second fixing plate (201), and two parallel limiting plates (202) and a baffle (203) are welded to the top of the second fixing plate (201). The baffle (203) is welded to one side of the limiting plate (202). A slot is provided between the two limiting plates (202), and the second tension plate (204) is slidably connected inside the slot. A screw (205) is also welded to one side of the second tension plate (204). A bolt hole is provided on the baffle (203) for the screw (205) to pass through. A nut (206) is also threaded to one end of the screw (205) that passes through the bolt hole. A displacement gauge (107) is also installed between the first fixing plate (101) and the second tensioning plate (204).

2. The integrated device for prestressed cable pretensioning and calibration according to claim 1, characterized in that, The first fixing plate (101) is a steel plate with bolt holes. The first fixing plate (101) is fixed to the rigid beam (3) by bolts.

3. The integrated device for prestressed cable pretensioning and calibration according to claim 1, characterized in that, The second fixing plate (201) is a steel plate with bolt holes; the second fixing plate (201) is fixed to the rigid beam (3) by bolts.

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