A whole-bunch tensioning single-root displacement measuring device

Abstract

The application discloses a kind of whole bundle tensioning single displacement measuring devices.The whole bundle tensioning single displacement measuring device includes positioning sleeve, guide sealing sleeve, displacement sleeve, displacement measuring block, displacement slide column, displacement sensor and hydraulic assembly, positioning sleeve is set on anchor pad, positioning sleeve is equipped with multiple through holes, both ends of through hole are equipped with first hole and second hole;Guide sealing sleeve and displacement sleeve are in through hole;One end of displacement sleeve is in abutment with clamping piece, the other end is located in the gap between positioning sleeve and guide sealing sleeve, and displacement sleeve can slide up and down;Displacement measuring block is equipped with multiple third hole;Displacement slide column is slidably arranged in third hole;The detection end of displacement sensor extends into third hole, and is in abutment with displacement slide column;First hole, second hole and third hole are respectively connected with hydraulic assembly.The application provides a kind of whole bundle tensioning single displacement measuring device, can effectively measure the displacement amount of single steel strand when whole tensioning, and measurement precision is high.

Description

Technical Field

[0001] This invention relates to the field of building construction safety technology, and in particular to a device for measuring the displacement of a single strand during whole-strand tensioning. Background Technology

[0002] A prestressed system is installed within a continuous beam. This system involves threading prestressed steel strands through prestressed ducts within the continuous beam and then tensioning them at both ends using hydraulic jacks. During tensioning, the tension stress and strain must be strictly controlled according to design requirements. However, due to a lack of relevant testing methods, precise control of tension stress and strain is not possible. Current displacement detection devices can only measure the displacement of a single steel strand during single-strand tensioning, resulting in significant measurement errors. To address these shortcomings, this invention provides a device for measuring the displacement of a single strand during overall bundle tensioning. Summary of the Invention

[0003] To address the technical problem that existing displacement detection devices can only measure the displacement of a single steel strand during tensioning, resulting in significant measurement errors, this invention provides a single-strand displacement measuring device for whole-bundle tensioning. This device can effectively measure the displacement of a single steel strand during overall tensioning, offering high measurement accuracy. Furthermore, the device is compact, small in size, easy to install, and suitable for various measurement environments.

[0004] This invention provides a device for measuring the displacement of a single strand during whole-strand tensioning, comprising a positioning sleeve, a guide sealing sleeve, a displacement sleeve, a displacement measuring block, a displacement sliding column, a displacement sensor, and a hydraulic assembly. One end of the positioning sleeve is fitted onto an anchor plate, and the positioning sleeve has multiple through holes extending along the axial direction of the positioning sleeve. The two ends of each through hole have a first channel and a second channel extending radially through the positioning sleeve. The guide sealing sleeve and the displacement sleeve are sequentially disposed within the through holes along the radial direction of the through holes. The end of the guide sealing sleeve furthest from the anchor plate is connected to the... The inner walls of the through holes abut against each other; one end of the displacement sleeve abuts against the clip on the anchor plate, and the other end receives the gap between the positioning sleeve and the guide sealing sleeve, and the displacement sleeve can slide up and down along the gap; the displacement measuring block is provided with multiple third channels; the displacement slide is slidably disposed in the third channel; the displacement sensor is disposed at one end of the displacement measuring block, and the detection end of the displacement sensor extends into the third channel and abuts against the displacement slide; the first channel, the second channel and the third channel are respectively connected to the hydraulic assembly.

[0005] In a preferred embodiment of the single-strand displacement measuring device for whole-bundle tensioning provided by the present invention, the inner wall of the through hole is provided with an inwardly extending first annular protrusion, the first annular protrusion being located below the first channel, and the inner wall of the first annular protrusion fitting against the displacement sleeve; the upper end of the displacement sleeve is provided with an outwardly extending second annular protrusion, the outer wall of the second annular protrusion fitting against the inner wall of the through hole; the first channel connects the gap between the positioning sleeve and the displacement sleeve; the second channel connects the gap between the positioning sleeve and the guide sealing sleeve.

[0006] In a preferred embodiment of the single-strand displacement measuring device for whole-bundle tensioning provided by the present invention, the lower end of the displacement sleeve is provided with an inwardly extending third annular protrusion.

[0007] In a preferred embodiment of the whole-bundle tensioning single-strand displacement measuring device provided by the present invention, the first channel, the second channel and the third channel are respectively provided with internal threads at the ends connected to the hydraulic component.

[0008] In a preferred embodiment of the single-strand displacement measuring device for whole-bundle tensioning provided by the present invention, the positioning sleeve is provided with a first groove on the side near the anchor plate, and the diameter of the first groove is the same as the outer diameter of the anchor plate.

[0009] In a preferred embodiment of the single-strand displacement measuring device for whole-bundle tensioning provided by the present invention, a nut is provided at the end of the through hole away from the anchor plate; a second groove is provided at the bottom of the nut, the top of the guide sealing sleeve abuts against the second groove, and a sealing ring is provided between the guide sealing sleeve and the nut.

[0010] In a preferred embodiment of the single-strand displacement measuring device for whole-bundle tensioning provided by the present invention, the through holes are provided one-to-one with the through holes of the steel strands on the anchor plate, and the number of the third channels is not less than the number of the through holes.

[0011] In a preferred embodiment of the whole-bundle tensioning single-strand displacement measuring device provided by the present invention, the diameter of the displacement slide is the same as the diameter of the third channel.

[0012] In a preferred embodiment of the single-strand displacement measuring device for whole-bundle tensioning provided by the present invention, the hydraulic component includes an oil tank, an oil pump, and a reversing valve. The oil tank is connected to the oil pump, and the oil pump, the first channel, the second channel, and the third channel are respectively connected to the reversing valve. During measurement, the reversing valve is adjusted to connect the second channel to the third channel and the first channel to the oil pump. During reset, the reversing valve is adjusted to connect the second channel to the oil pump and the first channel to the third channel.

[0013] Compared with existing technologies, the method and system for drone order allocation provided by this invention have the following advantages: By setting up a positioning sleeve, a guide sealing sleeve, a displacement sleeve, a displacement measuring block, a displacement sliding column, a displacement sensor, and hydraulic components, during measurement, the steel strand is tensioned by a through-hole jack, the steel strand drives the clamp to move, and then drives the displacement sleeve to move. The oil in the gap between the positioning sleeve and the guide sealing sleeve enters the third channel through the second channel, driving the displacement sliding column to move. The needle of the displacement sensor retracts, thereby realizing the measurement of the displacement value of each steel strand. The measurement accuracy is high, and the device has a compact structure, small size, and is easy to install, and can be applied to different measurement environments. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the installation structure of the single-strand displacement measuring device for whole-bundle tensioning provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the displacement measuring block provided in an embodiment of the present invention; Figure 3 This is a schematic diagram showing the connection between the first channel, the second channel, and the third channel and the hydraulic component provided in the embodiment of the present invention.

[0016] Explanation of icon numbers: 11. Positioning sleeve; 111. Through hole; 112. First channel; 113. Second channel; 114. First annular protrusion; 12. Guide sealing sleeve; 13. Displacement sleeve; 131. Second annular protrusion; 132. Third annular protrusion; 14. Displacement measuring block; 141. Third channel; 15. Displacement slide bar; 16. Displacement sensor; 17. Hydraulic assembly; 171. Oil tank; 172. Oil pump; 173. Directional valve; 18. Nut; 19. Sealing ring; 20. Anchor plate; 21. Clamping piece; 22. Steel strand. Detailed Implementation

[0017] 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 a part of the embodiments of the present invention, and not all of them. 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.

[0018] In embodiments of the present invention, words such as "exemplarily" and "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" in the present invention should not be construed as superior or more advantageous than other embodiments or designs. Rather, the use of the term "exemplary" is intended to present the concept in a specific manner. Furthermore, in embodiments of the present invention, the meaning expressed by "and / or" can be both, or either one.

[0019] Please refer to the following: Figure 1 , Figure 2 and Figure 3 ,in, Figure 1 This is a schematic diagram of the installation structure of the single-strand displacement measuring device for whole-bundle tensioning provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the displacement measuring block provided in an embodiment of the present invention; Figure 3 This is a schematic diagram showing the connection between the first, second, and third channels and the hydraulic assembly provided in an embodiment of the present invention. An embodiment of the present invention provides a single-strand displacement measuring device for whole-bundle tensioning, including a positioning sleeve 11, a guide sealing sleeve 12, a displacement sleeve 13, a displacement measuring block 14, a displacement sliding column 15, a displacement sensor 16, and a hydraulic assembly 17. One end of the positioning sleeve 11 is fitted onto an anchor plate 20, and the positioning sleeve 11 has multiple through holes 111 extending along the axial direction of the positioning sleeve 11. The two ends of each through hole 111 have a first channel 112 and a second channel 113 extending radially through the positioning sleeve 11. The guide sealing sleeve 12 and the displacement sleeve 13 are sequentially arranged within the through holes 111 along the radial direction of the through holes 111. The guide sealing sleeve 12 is located away from the anchor plate 20. The first end abuts against the inner wall of the through hole 111; one end of the displacement sleeve 13 abuts against the clamping piece 21 on the anchor plate 20, and the other end receives the gap between the positioning sleeve 11 and the guide sealing sleeve 12, and the displacement sleeve 13 can slide up and down along the gap; the displacement measuring block 14 is provided with a plurality of third channels 141; the displacement slide column 15 is slidably disposed in the third channel 141; the displacement sensor 16 is disposed at one end of the displacement measuring block 14, and the detection end of the displacement sensor 16 extends into the third channel 141 and abuts against the displacement slide column 15; the first channel 112, the second channel 113 and the third channel 141 are respectively connected to the hydraulic assembly 17.

[0020] The single-strand displacement measuring device for whole-strand tensioning provided in this embodiment, by setting up the positioning sleeve 11, the guide sealing sleeve 12, the displacement sleeve 13, the displacement measuring block 14, the displacement sliding column 15, the displacement sensor 16, and the hydraulic assembly 17, during measurement, the steel strand 22 is tensioned by a through-hole jack. The steel strand 22 drives the clamping plate 21 to move, which in turn drives the displacement sleeve 13 to move. The oil in the gap between the positioning sleeve 11 and the guide sealing sleeve 12 enters the third channel 141 through the second channel 113, which drives the displacement sliding column 15 to move. The needle of the displacement sensor 16 retracts, thereby realizing the measurement of the displacement value of the steel strand 22. The measurement accuracy is high, and the device has a compact structure, small size, and is easy to install, and can be applied to different measurement environments.

[0021] Specifically, the displacement sensor 16 is a push rod type displacement sensor, which has the characteristics of fast response speed and strong anti-interference ability, making it suitable for precision detection and effectively ensuring the accuracy of measurement.

[0022] Furthermore, the inner wall of the through hole 111 is provided with an inwardly extending first annular protrusion 114, the first annular protrusion 114 is located below the first channel 112, and the inner wall of the first annular protrusion 114 is in contact with the displacement sleeve 13; the upper end of the displacement sleeve 13 is provided with an outwardly extending second annular protrusion 131, the outer wall of the second annular protrusion 131 is in contact with the inner wall of the through hole 111; the first channel 112 connects the gap between the positioning sleeve 11 and the displacement sleeve 13; the second channel 113 connects the gap between the positioning sleeve 11 and the guide sealing sleeve 12.

[0023] Furthermore, the lower end of the displacement sleeve 13 is provided with an inwardly extending third annular protrusion 132. This arrangement increases the contact area between the displacement sleeve 13 and the clamping piece 21, making the force on the displacement sleeve 13 more uniform, the movement more stable, and improving stability.

[0024] Furthermore, the ends of the first channel 112, the second channel 113, and the third channel 141 that are connected to the hydraulic component 17 are respectively provided with internal threads, which facilitates the installation of oil pipes connected to the hydraulic component 17.

[0025] Furthermore, the positioning sleeve 11 is provided with a first groove on the side near the anchor plate 20, and the diameter of the first groove is the same as the outer diameter of the anchor plate 20. By providing the first groove, it is convenient to position during installation, and at the same time, it can prevent the positioning sleeve 11 from moving around during measurement, thus affecting the measurement accuracy.

[0026] Furthermore, a nut 18 is provided at the end of the through hole 111 away from the anchor plate 20; a second groove is provided at the bottom of the nut 18, the top of the guide sealing sleeve 12 abuts against the second groove, and a sealing ring 19 is provided between the guide sealing sleeve 12 and the nut 18; by providing the sealing ring 19, the sealing performance between the positioning sleeve 11, the guide sealing sleeve 12 and the nut 18 can be effectively improved, ensuring the oil seal of the gap between the positioning sleeve 11 and the guide sealing sleeve 12.

[0027] Furthermore, the through holes 111 are provided one-to-one with the through holes of the steel strands on the anchor plate 20, and the number of the third channels 141 is not less than the number of the through holes 111. With this arrangement, the displacement of each steel strand 22 passing through the anchor plate 20 can be measured simultaneously, ensuring the consistency of the measurement and reducing the measurement error of the system.

[0028] Furthermore, the diameter of the displacement slide 15 is the same as the diameter of the third channel 141. This arrangement ensures that the displacement slide 15 can slide flexibly within the third channel 141, while also ensuring the sealing between the displacement slide 15 and the displacement measuring block 14, thus guaranteeing the sealing of the oil within the third channel 141.

[0029] Furthermore, the hydraulic assembly 17 includes an oil tank 171, an oil pump 172, and a reversing valve 173. The oil tank 171 is connected to the oil pump 172, and the oil pump 172, the first channel 112, the second channel 113, and the third channel 141 are respectively connected to the reversing valve 173. During measurement, the reversing valve 173 is adjusted to connect the second channel 113 with the third channel 141, and the first channel 112 with the oil pump 172. During reset, the reversing valve 173 is adjusted to connect the second channel 113 with the oil pump 172, and the first channel 112 with the third channel 141.

[0030] Specifically, the oil pump 172 and the reversing valve 173 can be manual oil pumps and manual reversing valves.

[0031] During tension measurement, the positioning sleeve 11, guide sealing sleeve 12, displacement sleeve 13, displacement measuring block 14, displacement sliding column 15, displacement sensor 16, and hydraulic assembly 17 are first assembled. The displacement sensor 16 is then connected to an external data processing device (such as a computer). Next, the steel strand 22 is passed through the clamp 21, positioning sleeve 11, displacement sleeve 13, guide sealing sleeve 12, and sealing ring 19, and then through a through-hole jack and tool anchor. The through-hole jack pulls the steel strand 22 outward. When pulled, the clamp 21 moves outward at the same time, driving the displacement sleeve 13 to move. The oil enters the third channel 141 through the second channel 113, driving the displacement slide 15 to move. The movement of the displacement slide 15 causes the needle of the displacement sensor 16 to retract, converting the displacement into an analog electrical signal and inputting it to an external data processing device. The external data processing device calculates the displacement value of each displacement sensor 16 to obtain the displacement of each clamp 21.

[0032] During measurement reset, the reversing valve 173 is controlled to reverse, the second channel 113 is connected to the oil tank 171 and the oil pump 172, and the oil pump 172 is controlled to reset the displacement sleeve 13; the first channel 112 is connected to the oil tank 171 and the oil pump 172, and the needle of the displacement sensor 16 is manually pressed to complete the reset.

[0033] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A device for measuring the displacement of a single strand during whole-bundle tensioning, characterized in that, The system includes a positioning sleeve, a guide sealing sleeve, a displacement sleeve, a displacement measuring block, a displacement sliding column, a displacement sensor, and hydraulic components. One end of the positioning sleeve is fitted onto an anchor plate, and the positioning sleeve has multiple through holes extending along its axial direction. Each through hole has a first channel and a second channel extending radially through the positioning sleeve. The guide sealing sleeve and the displacement sleeve are sequentially positioned within the through holes along their radial direction. The end of the guide sealing sleeve away from the anchor plate abuts against the inner wall of the through hole. One end of the displacement sleeve abuts against the clip on the anchor plate, and the other end receives the gap between the positioning sleeve and the guide sealing sleeve, and the displacement sleeve can slide up and down along the gap; the displacement measuring block is provided with multiple third channels; the displacement slide is slidably disposed in the third channel; the displacement sensor is disposed at one end of the displacement measuring block, and the detection end of the displacement sensor extends into the third channel and abuts against the displacement slide; the first channel, the second channel and the third channel are respectively connected to the hydraulic assembly.

2. The single-strand displacement measuring device for whole-bundle tensioning according to claim 1, characterized in that, The inner wall of the through hole is provided with an inwardly extending first annular protrusion, which is located below the first channel and the inner wall of the first annular protrusion is in contact with the displacement sleeve; the upper end of the displacement sleeve is provided with an outwardly extending second annular protrusion, the outer wall of the second annular protrusion is in contact with the inner wall of the through hole; the first channel connects the gap between the positioning sleeve and the displacement sleeve; the second channel connects the gap between the positioning sleeve and the guide sealing sleeve.

3. The single-strand displacement measuring device for whole-bundle tensioning according to claim 2, characterized in that, The lower end of the displacement sleeve is provided with an inwardly extending third annular protrusion.

4. The single-strand displacement measuring device for whole-bundle tensioning according to claim 1, characterized in that, The first, second, and third channels are each provided with internal threads at the ends that connect to the hydraulic assembly.

5. The single-strand displacement measuring device for whole-bundle tensioning according to claim 1, characterized in that, The positioning sleeve has a first groove on the side near the anchor plate, and the diameter of the first groove is the same as the outer diameter of the anchor plate.

6. The single-strand displacement measuring device for whole-bundle tensioning according to claim 1, characterized in that, A nut is provided at the end of the through hole away from the anchor plate; a second groove is provided at the bottom of the nut, the top of the guide sealing sleeve abuts against the second groove, and a sealing ring is provided between the guide sealing sleeve and the nut.

7. The single-strand displacement measuring device for whole-bundle tensioning according to claim 1, characterized in that, The through holes are provided one-to-one with the through holes of the steel strands on the anchor plate, and the number of the third channels is not less than the number of the through holes.

8. The single-strand displacement measuring device for whole-bundle tensioning according to claim 1, characterized in that, The diameter of the displacement slide is the same as the diameter of the third channel.

9. The single-strand displacement measuring device for whole-bundle tensioning according to claim 1, characterized in that, The hydraulic assembly includes an oil tank, an oil pump, and a directional valve. The oil tank is connected to the oil pump, and the oil pump, the first channel, the second channel, and the third channel are respectively connected to the directional valve. During measurement, the directional valve is adjusted to connect the second channel to the third channel and the first channel to the oil pump. During reset, the directional valve is adjusted to connect the second channel to the oil pump and the first channel to the third channel.

Images