Testing device capable of testing bond stress of prestressed steel wire

Abstract

The utility model discloses a testing device capable of testing the bond stress of a prestressed steel wire, and particularly relates to the field of bond stress testing. The device comprises a testing steel wire, and the testing steel wire penetrates through an anchoring clamp, a fixed end cross beam, a trepanning testing mold, a tensioning end cross beam and a movable cross beam to form a penetrating structure. When the device is used, a testing steel wire is fixed through the anchoring clamp, stability in the testing process is ensured, the fixed end cross beam and the tensioning end cross beam are matched with the force bearing support to form a stable testing frame, the design of the movable cross beam and the directional moving testing mold facilitates adjustment of the testing position, and the limiting rod provides extra supporting and positioning functions. The base plate and the base feet enhance the stability of the electric loading device, the non-slip mat prevents sliding, the electric loading device is controlled by the central control device, accurate loading and unloading are achieved, the pressure sensor monitors and records bond stress data in real time, the directional moving test mold is used for simulating actual working conditions, and the test accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the field of grip strength testing, and more specifically, to a test device that can perform grip strength testing on prestressed steel wire. Background Technology

[0002] Prestressed concrete cylinder pipe (PCCP) is a widely used pipe material in large-scale water conveyance projects in my country. Most PCCP failures stem from the breakage of the prestressing steel wires, and domestic scholars have conducted extensive research on this issue. To protect the prestressing steel wires from external environmental corrosion, PCCP and JPCCP (Jump-type prestressed concrete cylinder pipe) employ a method of spraying a cement mortar or fine aggregate concrete protective layer onto the outer layer of the prestressing steel wires. Currently, there is limited research on testing equipment for assessing the bond strength between prestressed steel wires and cement mortar or fine aggregate concrete. Measuring bond strength will be beneficial for the long-term inspection, evaluation, and maintenance of pipelines.

[0003] In the production process of PCCP and JPCCP, prestressed steel wires are typically wound around the core first, and then an outer protective layer is sprayed. In order to better simulate the pipeline manufacturing process, the prestressed steel wires should also be tensioned first in the test, and then the cement-based composite material should be poured, vibrated evenly, and cured before the gripping force test is carried out, so as to simulate the gripping force of the outer protective layer on the remaining steel wire after wire breakage.

[0004] Therefore, a test device is proposed to address the above problems and enable testing of the gripping force of prestressed steel wire. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a test device that can realize the test of the gripping force of prestressed steel wire, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a test device for testing the gripping force of prestressed steel wire, comprising a test steel wire, with an anchoring clamp nested in the middle of the test steel wire; a fixed end beam nested on one side of the test steel wire, load-bearing supports overlapping on both sides of the fixed end beam, a tensioning end beam overlapping on the other side of the load-bearing supports, a platform overlapping at the bottom of both sides of the tensioning end beam, a movable crossbeam movably connected to one side of the top of the platform, a limit rod penetrating through the middle of both sides of the movable crossbeam, base feet fixedly connected to the top of both sides of the platform, a base plate fixedly connected to the top middle of the base feet, an anti-slip pad fixedly connected to the top middle of the base plate, an electric loading device movably connected to both sides of the surface of the tensioning end beam, a pressure sensor embedded in the middle of the front of the electric loading device, an open test mold movably connected to the front of the pressure sensor, a central control device connected to the electric loading device, and a load-bearing column fixedly connected to the other side of the limit rod.

[0007] Preferably, the bottom of the perforated test mold is fixedly connected to a directional caster, and the bottom of the directional caster is movably connected to a sunken platform.

[0008] Preferably, there are two limiting rods, which are symmetrically distributed on the left and right, and their two ends are respectively connected to the tensioning end crossbeam and the load-bearing column, providing additional support and positioning functions for the movable crossbeam.

[0009] Preferably, there are two load-bearing supports, which are symmetrically distributed on the left and right, and are respectively connected to the fixed end crossbeam and the tensioning end crossbeam at both ends to form a support and fixing structure.

[0010] Preferably, the electric loading device is used to load one end of the mold with holes or the movable crossbeam, and the other end is movably connected to the movable crossbeam.

[0011] Preferably, the test wire passes through the anchoring clamp, the fixed end beam, the perforated test mold, the tensioning end beam, and the movable beam to form a through structure.

[0012] Preferably, the anti-slip mat has an arc-shaped structure, and its top outer wall is connected to the bottom outer wall of the electric loading device, forming an upper and lower structure. The bottom of the anti-slip mat has a base plate.

[0013] Preferably, the central control device is connected to the electric loading device to form an external connection structure.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] Compared with existing technologies, this testing device for prestressed steel wire gripping force testing features a more robust testing framework. The test wire is fixed by anchoring clamps to ensure stability during testing. The fixed-end beam and tensioning-end beam, together with a load-bearing bracket, form a stable testing frame. The movable beam and directional moving mold facilitate adjustment of the test position. Limiting rods provide additional support and positioning. The base plate and base feet enhance the stability of the electric loading device, while anti-slip pads further prevent slippage. The electric loading device is controlled by a central control unit for precise loading and unloading. Pressure sensors monitor and record gripping force data in real time. The directional moving mold simulates actual working conditions, improving test accuracy. The advantages of this device include ease of operation, accurate testing, reliable data, and a high degree of automation, effectively improving the efficiency and quality of prestressed steel wire gripping force testing. Attached Figure Description

[0016] Figure 1 This is a test device that can test the grip strength of prestressed steel wire.

[0017] Figure 2 This is a top view of a test apparatus that can test the grip strength of prestressed steel wire.

[0018] Figure 3 This is a schematic diagram of the base of a test device that can test the grip strength of prestressed steel wire.

[0019] Figure 4 This is a schematic diagram of a test device for directional movement of a test mold that can test the grip strength of prestressed steel wire.

[0020] The attached diagram is labeled as follows: 1. Test steel wire; 2. Anchoring clamp; 3. Platform; 4. Fixed end crossbeam; 5. Tensioning end crossbeam; 6. Movable crossbeam; 7. Load-bearing bracket; 8. Limiting rod; 9. Load-bearing column; 10. Electric loading device; 11. Anti-slip mat; 12. Base plate; 13. Base foot; 14. Pressure sensor; 15. Central control equipment; 16. Opening test mold; 17. Directional caster; 18. Recessed platform. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] As attached Figure 1-4The apparatus shown is a test device for testing the grip strength of prestressed steel wire, comprising a test steel wire 1, with an anchoring clamp 2 nested in the middle of the test steel wire 1; a fixed end beam 4 nested on one side of the test steel wire 1, load-bearing supports 7 overlapping on both sides of the fixed end beam 4, a tensioning end beam 5 overlapping on the other side of the load-bearing supports 7, a platform 3 overlapping at the bottom of both sides of the tensioning end beam 5, a movable beam 6 movably connected to one side of the top of the platform 3, and limit rods 8 penetrating through the middle of both sides of the movable beam 6. The top two sides of the platform 3 are fixedly connected to the base feet 13, the top middle of the base feet 13 is fixedly connected to the base plate 12, the top middle part of the base plate 12 is fixedly connected to the anti-slip pad 11, the two sides of the surface of the tension end beam 5 are movably connected to the electric loading device 10, the front middle part of the electric loading device 10 is embedded with the pressure sensor 14, the front of the pressure sensor 14 is movably connected to the open test mold 16, the electric loading device 10 is connected to the central control device 15, and the other side of the limit rod 8 is fixedly connected to the load-bearing column 9.

[0024] The test wire 1 is fixed by the anchoring clamp 2 to ensure stability during the test. The fixed end crossbeam 4 and the tensioning end crossbeam 5 work together with the load-bearing bracket 7 to form a stable test frame. The movable crossbeam 6 and the directional moving test mold are designed to facilitate the adjustment of the test position. The limiting rod 8 provides additional support and positioning functions. The base plate 12 and base feet 13 enhance the stability of the electric loading device 10. The anti-slip pad 11 further prevents slippage. The electric loading device 10 is controlled by the central control device 15 to achieve precise loading and unloading. The pressure sensor 14 monitors and records the gripping force data in real time. The directional moving test mold is used to simulate actual working conditions to improve the accuracy of the test. The advantages of this device are that it is easy to operate, accurate in testing, reliable in data, and has a high degree of automation, which can effectively improve the efficiency and quality of prestressed steel wire gripping force testing.

[0025] Example 2

[0026] Based on Embodiment 1, the solution in Embodiment 1 will be further described in detail below, with reference to the specific working method described in detail:

[0027] like Figure 1 As shown, in a preferred embodiment, the bottom of the perforated test mold 16 is fixedly connected to a directional caster 17, and the bottom of the directional caster 17 is movably connected to a sunken platform 18. Furthermore, the directional caster 17 facilitates the movement and positioning of the perforated test mold 16, improves testing flexibility, and reduces the labor intensity of operators when moving the test mold.

[0028] The working process of this utility model is as follows:

[0029] In use, this testing device for testing the gripping force of prestressed steel wire involves fixing the test wire 1 with anchoring clamps 2 to ensure stability during the test. The fixed-end crossbeam 4 and the tensioning-end crossbeam 5, together with the load-bearing bracket 7, form a stable testing frame. The movable crossbeam 6 and the directional moving mold facilitate adjustment of the test position. The limiting rod 8 provides additional support and positioning. The base plate 12 and base feet 13 enhance the stability of the electric loading device 10, and the anti-slip pad 11 further prevents slippage. The electric loading device 10 is controlled by the central control device 15 to achieve precise loading and unloading. The pressure sensor 14 monitors and records the gripping force data in real time. The directional moving mold is used to simulate actual working conditions, improving test accuracy. The advantages of this device are its ease of operation, accurate testing, reliable data, and high degree of automation. It effectively improves the efficiency and quality of prestressed steel wire gripping force testing. This is the working process and principle of the device.

[0030] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0031] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0032] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A test device for enabling testing of the gripping force of a prestressed steel wire, comprising a test wire (1), characterized in that: The middle part of the test steel wire (1) is nested with an anchor clamp (2); The side surface of the test steel wire (1) is nested with a fixed end beam (4), the two sides of the fixed end beam (4) are connected in lap with a bearing support (7), the other side of the bearing support (7) is connected in lap with a tension end beam (5), the two side bottoms of the tension end beam (5) are connected in lap with a table top (3), the top side of the table top (3) is movably connected with a movable beam (6), the two middle parts of the movable beam (6) are connected in penetration with a limiting rod (8), the top of the table top (3) is fixedly connected with a base foot (13), the top middle of the base foot (13) is fixedly connected with a base plate (12), the top middle part of the base plate (12) is fixedly connected with an anti-skid pad (11), the surface of the tension end beam (5) is movably connected with an electric loading device (10), the front middle part of the electric loading device (10) is embeddedly connected with a pressure sensor (14), the front of the pressure sensor (14) is movably connected with an open hole test mold (16), the electric loading device (10) is connected with a central control equipment (15), the other side of the limiting rod (8) is fixedly connected with a bearing column (9).

2. The test device capable of testing the gripping force of a prestressed steel wire according to claim 1, characterized in that: The bottom of the open hole test mold (16) is fixedly connected with a directional caster (17), and the bottom of the directional caster (17) is movably connected with a sunken table top (18).

3. The test device capable of testing the gripping force of a prestressed steel wire according to claim 2, characterized in that: The number of the limiting rod (8) is two, which is distributed in left-right symmetry, and the two ends are connected with the tension end beam (5) and the bearing column (9) respectively, providing additional support and positioning function for the movable beam (6).

4. The test device capable of testing the gripping force of a prestressed steel wire according to claim 1, characterized in that: The number of the bearing support (7) is two, which is distributed in left-right symmetry, and the two ends are connected with the fixed end beam (4) and the tension end beam (5) respectively to form a support fixed structure.

5. The test device capable of testing the gripping force of a prestressed steel wire according to claim 1, characterized in that: One end of the electric loading device (10) for loading is connected with the open hole test mold (16) or the movable beam (6), and the other end is movably connected with the movable beam (6).

6. The test device capable of testing the gripping force of a prestressed steel wire according to claim 1, characterized in that: The test steel wire (1) penetrates the anchor clamp (2), the fixed end beam (4), the open hole test mold (16), the tension end beam (5), and the movable beam (6) to form a penetration structure.

7. The test device capable of testing the gripping force of a prestressed steel wire according to claim 1, characterized in that: The anti-skid pad (11) is in an arc structure, and the top outer wall is connected with the bottom outer wall of the electric loading device (10) in an up-down structure, and the bottom of the anti-skid pad (11) has the base plate (12).

8. The test device capable of testing the gripping force of a prestressed steel wire according to claim 1, characterized in that: The central control equipment (15) is connected with the electric loading device (10) to form an external connection structure.

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