Prestress tensioning trolley

Abstract

The utility model relates to the technical field of prestress tension, and discloses a prestress tension trolley which comprises a trolley body with wheels, and four corners of the trolley body are respectively provided with a hydraulic oil cylinder extending downwards. The transverse tilt angle sensor, the longitudinal tilt angle sensor and the first PLC are arranged on the vehicle body, and the hydraulic oil cylinder, the transverse tilt angle sensor and the longitudinal tilt angle sensor are electrically connected with the first PLC. The moving assembly is arranged on the vehicle body and can move transversely and longitudinally, and the tensioning jack is arranged on the moving assembly. The levelness of the tensioning trolley is detected through the transverse tilt angle sensor and the longitudinal tilt angle sensor, and then the first PLC is matched with the four hydraulic oil cylinders to ascend and descend respectively, so that the flatness of the tensioning trolley body is rapidly and accurately adjusted, and inclination of the tensioning angle of a steel strand is avoided.

Description

Technical Field

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

[0002] Prestressing is the core of prestressed box girder construction, and it is also the most risky process in the girder manufacturing process. The quality of prestressing directly determines the service life and safety performance of the box girder. Therefore, it is particularly important to effectively improve the construction quality of prestressing, reduce safety risks, and improve construction efficiency.

[0003] The tensioning trolleys currently used on construction sites still have certain problems when in use, such as: the alignment of the tensioning jacks usually relies on visual inspection by construction personnel and then slowly fine-tuning to the position where the steel strands to be tensioned are completely aligned, and the overall alignment process is slow; at the same time, during the tensioning process, if the ground is uneven, usually only on-site materials such as steel plates and steel bars can be used to support the tensioning trolley, and the tensioning trolley cannot be adjusted to a precise horizontal state, thereby affecting the tensioning direction of the steel strands to be tensioned during the subsequent tensioning process, and further affecting the tensioning effect of the prestressed tensioning construction.

[0004] Therefore, a prestressed tensioning trolley is proposed to solve the above technical problems. Utility Model Content

[0005] The technical problem solved by the utility model is that the horizontal adjustment process of the tensioning trolley itself in the prior art is relatively troublesome, and the alignment process of the tensioning jack usually relies on manual visual inspection and then slow fine-tuning, resulting in low construction efficiency.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a prestressed tensioning trolley, including a vehicle body with wheels, wherein each of the four corners of the vehicle body is provided with a hydraulic cylinder extending downward; further comprising a lateral inclination sensor and a longitudinal inclination sensor and a first PLC controller arranged on the vehicle body, wherein the hydraulic cylinder, the lateral inclination sensor, and the longitudinal inclination sensor are electrically connected to the first PLC controller respectively;

[0007] The utility model also comprises a moving component which is arranged on the vehicle body and can move laterally and longitudinally, and a tensioning jack which is arranged on the moving component.

[0008] In particular, the moving assembly includes two mutually parallel ground rails arranged on the upper surface of the vehicle body, a vertical bracket is arranged at the end of the ground rail, and two ceiling rails are arranged on the top of the vertical bracket and are respectively located directly above the two ground rails; it also includes a lower slide sliding on the ground rail and an upper slide sliding on the ceiling rail, at least one vertical and rotatable first threaded rod is arranged between the upper slide and the lower slide, and the first threaded rod is driven to rotate by a first driving motor on the upper slide or the lower slide; it also includes a vertical first limit rod fixed between the upper slide and the lower slide;

[0009] It also includes a mounting plate, which is sleeved on the outside of the first limiting rod and the first threaded rod; the second threaded rod and the second limiting rod are horizontally penetrated by the mounting plate, the end of the second limiting rod is connected to the fixed plate, and the end of the second threaded rod is rotatably connected to the fixed plate; the mounting plate is also provided with a second driving motor for driving the second threaded rod to rotate, and a tensioning jack is fixedly installed on the fixed plate.

[0010] Furthermore, it also includes a second PLC controller and a laser locator arranged on the tensioning jack, the laser locator is also provided with target stickers corresponding to the steel strands to be tensioned, and the second PLC controller is electrically connected to the laser locator and the second drive motor respectively.

[0011] Furthermore, the longitudinal sections of the ceiling rail and the floor rail are both H-shaped, and the upper slide platform and the lower slide platform are respectively provided with sliding wheels embedded in the sliding grooves of the H-shaped ceiling rail and the floor rail.

[0012] Furthermore, it also includes a positioning bolt for locking the upper slide or the lower slide, wherein the positioning bolt vertically penetrates the upper slide and then tightens the ceiling rail or vertically penetrates the lower slide and then tightens the ground rail.

[0013] Furthermore, diagonal braces fixed to the upper surface of the vehicle body are provided on the left and right sides of the front and rear ends of the overhead rail.

[0014] Compared with the prior art, the utility model has the following advantages and beneficial effects: the utility model detects the horizontality of the tensioning trolley through a lateral inclination sensor and a longitudinal inclination sensor, and then lifts and lowers the trolley separately through the first PLC controller in conjunction with four hydraulic cylinders, thereby quickly and accurately adjusting the flatness of the tensioning trolley body to avoid tilting the tensioning angle of the steel strand. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the vehicle body structure from a top view.

[0016] Figure 2 This is a schematic diagram of the connection relationship between the ceiling rail, ground rail and mounting plate.

[0017] Figure 3It is a schematic diagram of the connection relationship between the mounting plate and the fixing plate.

[0018] The meanings of the numbers in the figure are: vehicle body—1; hydraulic cylinder—2; lateral inclination sensor—3; longitudinal inclination sensor—4; ground rail—5; ceiling rail—6; upper slide—7; lower slide—8; first threaded rod—9; first limit rod—10; mounting plate—11; second threaded rod—12; second limit rod—13; fixing plate—14; second drive motor—16; tensioning jack—17; laser locator—18; diagonal support rod—19. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the accompanying drawings in the embodiments of the utility model, so as to have a further understanding of the concept of the utility model, the technical problems solved, the technical features constituting the technical solutions and the technical effects brought about.

[0020] like Figure 1 As shown, the utility model is a prestressed tensioning trolley including a vehicle body 1 with wheels, wherein each of the four corners of the vehicle body 1 is provided with a hydraulic cylinder 2 extending downward; further comprising a lateral inclination sensor 3 and a longitudinal inclination sensor 4 and a first PLC controller arranged on the vehicle body 1, wherein the hydraulic cylinder 2, the lateral inclination sensor 3, and the longitudinal inclination sensor 4 are electrically connected to the first PLC controller respectively;

[0021] It also includes a moving assembly arranged on the vehicle body 1 and capable of moving laterally and longitudinally, and a tensioning jack 17 arranged on the moving assembly.

[0022] In the present utility model, the main working process is as follows: first, move the device of the present utility model to the end of the box girder to be tensioned, lower the hydraulic cylinder 2 to prop up the car body 1 in the air, detect the posture of the car body 1 through the lateral inclination sensor 3 and the longitudinal inclination sensor 4, and feed back to the first PLC controller, and the first PLC controller adjusts the extension length of each hydraulic cylinder to ensure that the car body 1 is in a horizontal state before starting tensioning, so as to avoid the steel strand tensioning angle from tilting. Then, the position of the tensioning jack 17 is quickly adjusted by moving the assembly, so as to achieve the purpose of accurately positioning the steel strand to be tensioned. Since the specific structure of realizing the data feedback of the angle sensor through the PLC controller and issuing the hydraulic cylinder extension and retraction command based on the data feedback is a relatively mature existing technology, its specific structure and circuit connection relationship will not be repeated here.

[0023] As a preferred embodiment, Figure 2As shown, the moving assembly includes two mutually parallel ground rails 5 arranged on the upper surface of the vehicle body 1, a vertical bracket is provided at the end of the ground rail 5, and two ceiling rails 6 are provided on the top of the vertical bracket and are respectively located directly above the two ground rails 5; it also includes a lower slide 8 sliding on the ground rail 5 and an upper slide 7 sliding on the ceiling rail 6, at least one vertical and rotatable first threaded rod 9 is provided between the upper slide 7 and the lower slide 8, and the first threaded rod 9 is driven to rotate by a first drive motor on the upper slide 7 or the lower slide 8; it also includes a vertical first limit rod 10 fixed between the upper slide 7 and the lower slide 8.

[0024] like Figure 3 As shown, it also includes a mounting plate 11, which is sleeved on the outside of the first limiting rod 10 and the first threaded rod 9; the mounting plate 11 is horizontally penetrated by a slidable second limiting rod 13 and a second threaded rod 12 threadedly matched with the mounting plate 11, the end of the second limiting rod 13 is connected to a fixed plate 14, and the end of the second threaded rod 12 is rotatably connected to the fixed plate 14; the mounting plate 11 is also provided with a second driving motor 16 for driving the second threaded rod 12 to rotate, and a tensioning jack 17 is fixedly installed on the fixed plate 14.

[0025] After the vehicle body 1 is leveled under the action of the hydraulic cylinder 2 and the first PLC controller, the upper slide 7 or the lower slide 8 is moved to adjust the position of the upper slide 7 and the lower slide 8 on the vehicle body 1 to the vicinity of the steel strand to be tensioned, and the first drive motor is started to drive the first threaded rod 9 to rotate, so that the first threaded rod 9 cooperates with the first limit rod 10 to drive the mounting plate 11 to slide up and down on the first threaded rod 9 and the first limit rod 10 until the height of the mounting plate 11 is consistent with the height of the steel strand to be tensioned, and then the second drive motor 16 is slowly started, and the second threaded rod 12 is used to drive the fixed plate 14 to drive the tensioning jack 17 to move, and during the displacement process, the position of the upper slide 7 or the lower slide 8 on the ceiling rail 6 or the ground rail 5 is adjusted, thereby effectively accelerating the alignment process of the tensioning jack 17 and the steel strand to be tensioned. It should be noted that, in order to achieve the above purpose, the penetration relationship between the second threaded rod 12 and the mounting plate 11 is essentially a threaded fitting relationship, and the penetration relationship between the second limiting rod 13 and the mounting plate 11 is a slidable sleeve relationship.

[0026] As a further embodiment, it also includes a second PLC controller and a laser locator 18 arranged on the tensioning jack 17, the laser locator 18 is also provided with target stickers corresponding one by one to the steel strands to be tensioned, and the second PLC controller is electrically connected to the laser locator 18 and the second drive motor 16 respectively.

[0027] In this embodiment, a technical solution is proposed to further speed up the alignment process of the tensioning jack 17 and the steel strand to be tensioned. Specifically, before moving the utility model device to the beam to be tensioned, a target sticker is first fixed above the steel strand to be tensioned. After the hydraulic cylinder 2 completes the support and leveling of the vehicle body 1, the mounting plate 11, the fixing plate 14 and the tensioning jack 17 are first raised to a height close to the target sticker by the first drive motor, and then the position of the upper slide 7 or the lower slide 8 is fine-tuned so that the laser emitted by the laser locator 18 can accurately illuminate the target sticker, indicating that the tensioning jack 17 is aligned with the steel strand to be tensioned. At this time, the second PLC controller receives the signal and sends a prompt to the outside, so as to facilitate the construction personnel to lock the height and horizontal position of the mounting plate 11 and avoid the inaccuracy and inefficiency of manual visual observation.

[0028] As a further embodiment, the longitudinal sections of the ceiling rail 6 and the floor rail 5 are both H-shaped, and the upper slide 7 and the lower slide 8 are respectively provided with sliding wheels embedded in the slide grooves of the H-shaped ceiling rail 6 and the floor rail 5.

[0029] This embodiment provides a specific structure in which the ceiling rail 6 and the ground rail 5 are slidably connected to the upper slide 7 and the lower slide 8 respectively. The H-shaped longitudinal section can provide a recessed slide groove, so that the upper slide 7 and the lower slide 8 move in the recessed slide groove throughout the entire process, thereby preventing the upper slide 7 and the lower slide 8 from deflecting or tilting.

[0030] As a further embodiment, it also includes a positioning bolt for locking the upper slide 7 or the lower slide 8, wherein the positioning bolt vertically penetrates the upper slide 7 and then tightens the ceiling rail 6 or vertically penetrates the lower slide 8 and then tightens the ground rail 5.

[0031] In this embodiment, a locking structure is provided for locking the upper slide 7 or the lower slide 8. The positioning bolt passes through the lower slide 8 vertically downward and then presses against the ground rail 5, or the positioning bolt passes through the upper slide 7 vertically upward and then presses against the ceiling rail 6, thereby quickly fixing the position of the upper and lower slides on the vehicle body 1 to prevent the position of the tensioning jack 17 from changing during the tensioning process.

[0032] As a further embodiment, the left and right sides of the front and rear ends of the ceiling rail 6 are further provided with diagonal braces 19 fixed to the upper surface of the vehicle body 1 .

[0033] In this embodiment, diagonal braces are provided on the left and right sides of the front and rear ends of the ceiling rail 6, thereby effectively ensuring the stability of the ceiling rail 6 and the ground rail 5 and preventing the angle and position of the tensioning jack 17 from changing during the tensioning process.

[0034] The words “connection” and “fixation” appearing in the description of the present invention may refer to fixed connection, processing and forming, welding, or mechanical connection. The specific meanings of the above terms in the present invention shall be understood according to the specific circumstances.

[0035] In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc., which indicate the orientation or position relationship, are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying a specific orientation that the device or element referred to must have, and therefore cannot be understood as a limitation on the present invention.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A prestressed tensioning trolley, characterized in that: The invention comprises a vehicle body (1) with wheels, wherein each of the four corners of the vehicle body (1) is provided with a hydraulic cylinder (2) extending downward; and further comprises a lateral inclination sensor (3) and a longitudinal inclination sensor (4) arranged on the vehicle body (1) and a first PLC controller, wherein the hydraulic cylinder (2), the lateral inclination sensor (3) and the longitudinal inclination sensor (4) are respectively electrically connected to the first PLC controller; It also includes a moving component which is arranged on the vehicle body (1) and can move laterally and longitudinally, and a tensioning jack (17) which is arranged on the moving component.

2. A prestressed tensioning trolley according to claim 1, characterized in that: The moving assembly comprises two mutually parallel ground rails (5) arranged on the upper surface of the vehicle body (1), a vertical bracket is arranged at the end of the ground rail (5), and two ceiling rails (6) are arranged on the top of the vertical bracket and are respectively located directly above the two ground rails (5); it also comprises a lower slide (8) sliding on the ground rail (5) and an upper slide (7) sliding on the ceiling rail (6), at least one vertical and rotatable first threaded rod (9) is arranged between the upper slide (7) and the lower slide (8), and the first threaded rod (9) is driven to rotate by a first driving motor on the upper slide (7) or the lower slide (8); it also comprises a vertical first limit rod (10) fixed between the upper slide (7) and the lower slide (8); The invention also comprises a mounting plate (11), wherein the mounting plate (11) is sleeved on the outside of the first limiting rod (10) and the first threaded rod (9); the mounting plate (11) is laterally penetrated by a slidable second limiting rod (13) and a second threaded rod (12) threadedly engaged with the mounting plate (11); the end of the second limiting rod (13) is connected to a fixed plate (14); the end of the second threaded rod (12) is rotatably connected to the fixed plate (14); the mounting plate (11) is also provided with a second driving motor (16) for driving the second threaded rod (12) to rotate; the tensioning jack (17) is fixedly mounted on the fixed plate (14).

3. A prestressed tensioning trolley as claimed in claim 2, characterized in that: It also includes a second PLC controller and a laser locator (18) arranged on the tensioning jack (17), the laser locator (18) also being provided with target stickers corresponding one to one to the steel strands to be tensioned, and the second PLC controller being electrically connected to the laser locator (18) and the second drive motor (16), respectively.

4. A prestressed tensioning trolley as claimed in claim 2, characterized in that: The longitudinal sections of the ceiling rail (6) and the floor rail (5) are both H-shaped, and the upper slide platform (7) and the lower slide platform (8) are respectively provided with sliding wheels embedded in the slide grooves of the H-shaped ceiling rail (6) and the floor rail (5).

5. A prestressed tensioning trolley as claimed in claim 2, characterized in that: It also includes a positioning bolt for locking the upper slide (7) or the lower slide (8), wherein the positioning bolt vertically penetrates the upper slide (7) and then tightens the ceiling rail (6) or vertically penetrates the lower slide (8) and then tightens the floor rail (5).

6. A prestressed tensioning trolley as claimed in claim 2, characterized in that: The left and right sides of the front and rear ends of the overhead rail (6) are also provided with diagonal bracing rods (19) fixed to the upper surface of the vehicle body (1).

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