Prefabricated box girder assembly type tensioning notch die

Abstract

The invention discloses a prefabricated box girder assembly type tensioning notch mold, and belongs to the field of prefabricated part pouring forming. The prefabricated box girder assembly type tensioning notch mold comprises a bottom plate, two first connecting plates capable of synchronously and reversely sliding are arranged at the upper end of the bottom plate, and a first mold plate is fixed to each of the two first connecting plates; a fixing frame is fixed to the bottom plate, two second connecting plates capable of synchronously and reversely sliding in the vertical direction are arranged on the fixing frame, a second formwork is fixed to each second connecting plate, and the two second formworks are close to each other and can make contact with the upper side edge and the lower side edge of the first formwork to define a rectangular cavity. The steel plate is mounted at a tensioning notch for pouring; and after pouring is completed, the two first formworks and the two second formworks are controlled to be away from each other to achieve block-by-block formwork removal, and therefore edge breakage of tensioning notch concrete is reduced.

Description

Technical Field

[0001] The invention belongs to the field of prefabricated part casting and molding, and in particular relates to an assembled tensioning notch mold for a prefabricated box beam. Background Art

[0002] Prefabricated box girder is a common bridge structure. Its production includes multiple steps, among which casting is a key link. Tensioning notch is an important structural component of prefabricated box girder. It is a temporary notch reserved for the prestressing grouting of box girder and needs to be closed after the prestressing grouting. The existence of tensioning notch is crucial to the overall structural stability of box girder. It not only provides a channel for prestressing tendons so that prestressing tendons can be applied to the beam body, but also is related to the durability, stability and safety of the bridge.

[0003] However, in the prior art, during the casting process of the prefabricated box beam, the tensioning notch is prone to edge collapse and poor appearance quality after demoulding. Therefore, an assembled tensioning notch mold for a prefabricated box beam is proposed. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a prefabricated box girder assembly type tensioning notch mold to solve the problems in the prior art.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] The prefabricated box girder assembled tensioning slot mold comprises a bottom plate, on the upper end of which two first connecting plates capable of synchronously sliding in opposite directions are arranged, and a first template is fixed on each of the two first connecting plates; a fixing frame is fixed to the bottom plate, on which two second connecting plates capable of synchronously sliding in opposite directions in a vertical direction are arranged, and a second template is fixed on each of the two second connecting plates, and the two second templates are close to each other and can contact the upper and lower side edges of the first template to enclose a rectangular cavity, and are installed at the tensioning slot for pouring; after pouring is completed, the two first templates and the two second templates are controlled to move away from each other to realize block demoulding, thereby reducing the edge collapse of the tensioning slot concrete.

[0007] Furthermore, the fixed frame is fixed with a mounting plate, the mounting plate is provided with a sliding plate that can be slidably adjusted, the sliding plate is provided with a calibration assembly and a scraper assembly, the calibration assembly and the scraper assembly can be moved to the center position of the mounting plate respectively to align with the rectangular mold cavity, so as to calibrate the two first templates and clean the inner wall of the rectangular mold cavity.

[0008] Furthermore, a connecting block is provided on the sliding plate, a telescopic rod is provided on the mounting plate, and a driving shaft end of the telescopic rod is fixed to the connecting block;

[0009] A first limit block and a second limit plate are fixed on the mounting plate, and the connecting block is located between the first limit block and the second limit plate; and when the connecting block contacts the first limit block, the calibration assembly is located at the center of the mounting plate and aligned with the rectangular mold cavity; when the connecting block contacts the second limit block, the scraper assembly is located at the center of the mounting plate and aligned with the rectangular mold cavity.

[0010] Furthermore, the calibration assembly includes a first cylinder fixedly connected to the sliding plate, a support plate is fixed to the end of the driving shaft of the first cylinder, and a roller is rotatably connected to both ends of the support plate. When the calibration assembly reaches the center position of the mounting plate, the support plate can be in the center position between the two first templates under the drive of the first cylinder.

[0011] Furthermore, the scraper assembly includes a second cylinder fixed on the sliding plate, and a scraper is fixed on the driving shaft of the second cylinder. When the scraper assembly reaches the center position of the mounting plate, the scraper can enter the rectangular cavity and contact and cooperate with the four side walls of the rectangular cavity under the drive of the second cylinder.

[0012] Furthermore, a T-shaped sliding groove is provided on the mounting plate, and a matching block is provided on the sliding plate to slidingly match with the T-shaped sliding groove.

[0013] Furthermore, the two first connecting plates are both slidably connected to the base plate, two first fixed plates are arranged on the base plate, a first screw rod is rotatably connected between the two first fixed plates, and both ends of the first screw rod are respectively provided with a first external thread and a second external thread with opposite rotation directions and equal pitches, the first external thread and the second external thread respectively penetrate the two first connecting plates and are threadedly connected thereto.

[0014] Furthermore, the thread lead angles of the first external thread and the second external thread are both smaller than the equivalent friction angle.

[0015] Furthermore, the two second connecting plates are slidably connected to the fixing frame in the vertical direction, and two second fixing plates are arranged on the fixing frame. A second screw rod is rotatably connected between the two second fixing plates, and a third external thread and a fourth external thread with opposite rotation directions and equal pitches are respectively arranged at both ends of the second screw rod. The third external thread and the fourth external thread respectively penetrate the two second connecting plates and are threadedly connected thereto.

[0016] Furthermore, the thread lead angles of the third external thread and the fourth external thread are both smaller than the equivalent friction angle.

[0017] Beneficial effects of the present invention:

[0018] 1. The two second templates are controlled to be close to each other and enclosed with the first template to form a rectangular cavity, and are installed at the tensioning groove for pouring; after the pouring is completed, the two first templates and the two second templates are controlled to move away from each other to realize block-by-block demoulding, thereby reducing the collapse of the concrete edge of the tensioning groove.

[0019] 2. Before pouring, the calibration component is controlled to move to the center of the mounting plate and the distance between the two first templates is calibrated to ensure the accuracy of the pouring size.

[0020] 3. A scraper assembly is provided to scrape and clean the concrete in the inner cavity of the rectangular cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the tensioning notch mold of the present invention;

[0023] Figure 2 It is a schematic diagram of the bottom plate structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the first template assembly of the present invention;

[0025] Figure 4 is a schematic structural diagram of a second template assembly of the present invention;

[0026] Figure 5 is a schematic diagram of the second screw rod structure of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the calibration and cleaning mechanism of the present invention;

[0028] Figure 7 is a schematic diagram of the calibration assembly structure of the present invention;

[0029] Figure 8 It is a schematic diagram of the structure of the scraper assembly of the present invention;

[0030] Fig. 9 It is a schematic diagram of the mounting plate structure of the present invention;

[0031] Fig.10 It is a schematic diagram of the sliding plate structure of the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figure 1 As shown, the prefabricated box girder assembled tensioning notch mold comprises a bottom plate 1, and a first template assembly 2 and a second template assembly 3 are arranged at the upper end of the bottom plate 1 to form a rectangular mold cavity for casting and forming the tensioning notch;

[0034] like Figure 3 As shown, the first template assembly 2 includes two first connecting plates 21 that can slide synchronously and oppositely on the bottom plate 1, and a first template 22 is fixed on each of the two first connecting plates 21 to adjust the distance between the two first templates 22;

[0035] In this embodiment, the two first connecting plates 21 are both slidably connected to the bottom plate 1. Figure 2 As shown, two first fixing plates 11 are arranged on the bottom plate 1, and a first screw rod 23 is rotatably connected between the two first fixing plates 11. The two ends of the first screw rod 23 are respectively provided with a first external thread 231 and a second external thread 232 with opposite rotation directions and equal pitches. The first external thread 231 and the second external thread 232 respectively penetrate the two first connecting plates 21 and are threadedly connected thereto. By rotating the first screw rod 23, the two first connecting plates 21 and even the two first templates 22 can be synchronously slid in the opposite direction.

[0036] Furthermore, in order to ensure that the distance between the two first templates 22 remains stable after adjustment, the first screw rod 23 needs to have self-locking properties, that is, the thread lead angles of the first external thread 231 and the second external thread 232 are both smaller than the equivalent friction angle;

[0037] Of course, the method of driving the two first connecting plates 21 to slide synchronously in opposite directions includes but is not limited to the first screw rod 23 and other structures in this embodiment. In some embodiments, two cylinders can be set on the base plate 1 to drive the two first connecting plates 21 to slide synchronously in opposite directions respectively.

[0038] like Figure 4 As shown, the second template assembly 3 includes a fixing frame 34 fixed to the upper end of the bottom plate 1, and two second connecting plates 32 that can synchronously slide in opposite directions in the vertical direction are arranged on the fixing frame 34, and a second template 33 is fixed on each of the two second connecting plates 32. The two second templates 33 are synchronously approached to fit with the upper and lower ends of the first template 22 respectively, so as to enclose a rectangular mold cavity;

[0039] In this embodiment, the two second connecting plates 32 are slidably connected to the fixing frame 31 in the vertical direction. The fixing frame 31 is provided with two second fixing plates 311. The second screw rod 34 is rotatably connected between the two second fixing plates 311. Figure 5 As shown, the two ends of the second screw rod 34 are respectively provided with a third external thread 341 and a fourth external thread 342 with opposite rotation directions and equal pitches, and the third external thread 341 and the fourth external thread 342 respectively penetrate the two second connecting plates 32 and are threadedly connected thereto, and by rotating the second screw rod 34, the two second connecting plates 32 and even the two second templates 33 can be synchronously slid in opposite directions in the vertical direction;

[0040] Furthermore, in order to ensure that the positions of the two second templates 33 remain stable after adjustment, the second screw rod 34 also has a self-locking property, that is, the thread lead angles of the third external thread 341 and the fourth external thread 342 are both smaller than the equivalent friction angle.

[0041] Of course, the method of driving the two second connecting plates 32 to slide synchronously in opposite directions in the vertical direction includes but is not limited to the second screw rod 34 and other structures in this embodiment. In some embodiments, two cylinders can be set on the fixed frame 31 to drive the second connecting plates 32 to slide synchronously in opposite directions in the vertical direction.

[0042] In addition, in this embodiment, the fixing frame 31 and the bottom plate 1 are connected by bolts to achieve detachable fixing.

[0043] The fixing frame 31 is provided with a calibration cleaning mechanism 4, which can calibrate the distance between the two first templates 22 (the two second templates 33 only need to move to the side of the first template 22 to contact, so the second templates do not need to be calibrated) to ensure that the enclosed rectangular mold cavity meets the design requirements; and the calibration cleaning mechanism 4 can also scrape and clean the residual concrete adhering to the surface of the template after demolding;

[0044] like Figure 6 As shown, the calibration and cleaning mechanism 4 includes a mounting plate 41 fixed on the fixing frame 31, a sliding plate 42 capable of sliding adjustment is provided on the mounting plate 41, and a calibration component 43 and a scraper component 44 are provided on the sliding plate 42. By controlling the sliding plate 42 to slide, the calibration component 43 and the scraper component 44 can be moved to the center position of the mounting plate 41 to align with the rectangular mold cavity, thereby respectively realizing the calibration of the two first templates 22 and cleaning of the concrete inside the templates;

[0045] In this embodiment, if Fig. 9 and Fig.10As shown, a connecting block 422 is provided on the sliding plate 42, and a telescopic rod 45 is provided on the mounting plate 41. The end of the driving shaft of the telescopic rod 45 is fixed to the connecting block 422, and drives the sliding plate 42 to slide and adjust; a first limit block 412 and a second limit plate 413 are fixed on the mounting plate 41, and the connecting block 422 is located between the first limit block 412 and the second limit plate 413; and, when the connecting block 422 contacts the first limit block 412, the calibration assembly 43 is located at the center position of the mounting plate 41 and aligned with the rectangular mold cavity; when the connecting block 422 contacts the second limit block 413, the scraper assembly 44 is located at the center position of the mounting plate 41 and aligned with the rectangular mold cavity, so as to realize the switching between the calibration and cleaning working states.

[0046] In addition, in order to ensure the stability of the sliding plate 42 sliding on the mounting plate 41 , a T-shaped sliding groove 411 is provided on the mounting plate 41 , and a matching block 421 is provided on the sliding plate 42 to slidingly match with the T-shaped sliding groove 411 .

[0047] like Figure 7 As shown, the calibration component 43 includes a first cylinder 431 fixedly connected to the sliding plate 42, a support plate 432 is fixed to the end of the driving shaft of the first cylinder 431, and two ends of the support plate 432 are rotatably connected to a roller 433. When the calibration component 43 reaches the center position of the mounting plate 41, the support plate 432 can be located in the middle position between the two first templates 22 under the drive of the first cylinder 431. At this time, the two first templates 22 are controlled to be close to each other and contact with the two rollers 433 at the same time, so as to realize the calibration of the distance between the two first templates 22.

[0048] Furthermore, after the distance between the two first templates 22 is calibrated, the support plate 432 is retracted under the drive of the first cylinder 431, and the roller 433 rolls and retracts on the side of the first template 22 to reduce scratches on the inner wall of the first template 22 to ensure the casting quality.

[0049] like Figure 8 As shown, the scraper assembly 44 includes a second cylinder 441 fixed on the sliding plate 42, and a scraper 442 is fixed on the driving shaft of the second cylinder 442. When the scraper assembly 44 reaches the center position of the mounting plate 41, the scraper 442 can enter the rectangular cavity under the drive of the second cylinder 441, and contact and cooperate with the four side walls of the rectangular cavity (i.e., the side walls of the two first templates 22 and the two second templates 33) to clean and scrape off the residual concrete on the templates.

[0050] Working principle:

[0051] Before pouring, first control the calibration assembly 43 to move to the center of the mounting plate 41, and calibrate the distance between the two first templates 22. After calibration, withdraw the support plate 432 to ensure the accuracy of the pouring size. Then, control the two second templates 33 to approach each other and enclose the first template 22 to form a rectangular cavity, and install it at the tensioning notch for pouring; after pouring, control the two first templates 22 and the two second templates 33 to move away from each other to achieve block demolding, thereby reducing the collapse of the concrete edge of the tensioning notch. After demolding, remove the mold from the tensioning notch, and then control the templates to enclose the rectangular cavity again, and use the scraper assembly 44 to scrape and clean the concrete in the inner cavity.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A prefabricated box girder assembly type tensioning notch mold, comprising a bottom plate (1), characterized in that: Two first connecting plates (21) capable of synchronously sliding in opposite directions are arranged at the upper end of the bottom plate (1), and a first template (22) is fixed on each of the two first connecting plates (21); a fixing frame (31) is fixed on the bottom plate (1), and two second connecting plates (32) capable of synchronously sliding in opposite directions in a vertical direction are arranged on the fixing frame (31), and a second template (33) is fixed on each of the two second connecting plates (32), and the two second templates (33) are close to each other and can contact the upper and lower side edges of the first template (22) to enclose a rectangular cavity.

2. The prefabricated box girder assembly type tensioning notch mold according to claim 1, characterized in that: The fixing frame (31) is fixed with a mounting plate (41), and a sliding plate (42) capable of sliding adjustment is arranged on the mounting plate (41), and a calibration component (43) and a scraper component (44) are arranged on the sliding plate (42), and the calibration component (43) and the scraper component (44) can be moved to the center position of the mounting plate (41) respectively to align with the rectangular mold cavity, so as to calibrate the two first templates (22) and clean the inner wall of the rectangular mold cavity.

3. The prefabricated box girder assembly type tensioning notch mold according to claim 2, characterized in that: The sliding plate (42) is provided with a connecting block (422), the mounting plate (41) is provided with a telescopic rod (45), and the end of the driving shaft of the telescopic rod (45) is fixed to the connecting block (422); A first limit block (412) and a second limit plate (413) are fixed on the mounting plate (41), and the connecting block (422) is located between the first limit block (412) and the second limit plate (413); and when the connecting block (422) contacts the first limit block (412), the calibration assembly (43) is located at the center of the mounting plate (41) and is aligned with the rectangular mold cavity; when the connecting block (422) contacts the second limit block (413), the scraper assembly (44) is located at the center of the mounting plate (41) and is aligned with the rectangular mold cavity.

4. The prefabricated box girder assembly type tensioning notch mold according to claim 2, characterized in that: The calibration component (43) comprises a first cylinder (431) fixedly connected to the sliding plate (42); a support plate (432) is fixedly provided at the end of the driving shaft of the first cylinder (431); and a roller (433) is rotatably connected to each of the two ends of the support plate (432); when the calibration component (43) reaches the center position of the mounting plate (41), the support plate (432) can be located in the center position between the two first templates (22) under the drive of the first cylinder (431).

5. The prefabricated box girder assembly type tensioning notch mold according to claim 2, characterized in that: The scraper assembly (44) includes a second cylinder (441) fixed on the sliding plate (42), and a scraper (442) is fixed on the driving shaft of the second cylinder (441). When the scraper assembly (44) reaches the center position of the mounting plate (41), the scraper (442) can enter the rectangular cavity under the drive of the second cylinder (441) and contact and cooperate with the four side walls of the rectangular cavity.

6. The prefabricated box girder assembly type tensioning notch mold according to claim 2, characterized in that: The mounting plate (41) is provided with a T-shaped sliding groove (411), and the sliding plate (42) is provided with a matching block (421) for slidingly matching with the T-shaped sliding groove (411).

7. The prefabricated box girder assembly type tensioning notch mold according to claim 1, characterized in that: The two first connecting plates (21) are both slidably connected to the bottom plate (1); two first fixing plates (11) are arranged on the bottom plate (1); a first screw rod (23) is rotatably connected between the two first fixing plates (11); two ends of the first screw rod (23) are respectively provided with a first external thread (231) and a second external thread (232) with opposite rotation directions and equal pitches; the first external thread (231) and the second external thread (232) respectively penetrate the two first connecting plates (21) and are threadedly connected thereto.

8. The prefabricated box girder assembly type tensioning notch mold according to claim 7, characterized in that: The thread lead angles of the first external thread (231) and the second external thread (232) are both smaller than the equivalent friction angle.

9. The prefabricated box girder assembly type tensioning notch mold according to claim 1, characterized in that: The two second connecting plates (32) are both slidably connected to the fixing frame (31) in the vertical direction. The fixing frame (31) is provided with two second fixing plates (311). A second screw rod (34) is rotatably connected between the two second fixing plates (311). The two ends of the second screw rod (34) are respectively provided with a third external thread (341) and a fourth external thread (342) with opposite rotation directions and equal pitches. The third external thread (341) and the fourth external thread (342) respectively penetrate the two second connecting plates (32) and are threadedly connected thereto.

10. The prefabricated box girder assembly type tensioning notch mold according to claim 9, characterized in that: The thread lead angles of the third external thread (341) and the fourth external thread (342) are both smaller than the equivalent friction angle.

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