CN220534510U - Folding internal mold of box girder - Google Patents

Abstract

The utility model belongs to the technical field of building construction, and discloses a box girder folding internal mold. The box girder folding inner mold comprises an inner mold body, two folding structures and a guide assembly. The inner die body comprises a first half die plate and a second half die plate which are connected and oppositely arranged; two connection positions of the first half template and the second half template are respectively and correspondingly provided with a folding structure, the folding structure can be folded or unfolded, and simultaneously, the two folding structures are adjusted to enable the first half template and the second half template to move towards a direction close to or far away from each other so as to fold or unfold the inner die body. The guide assembly is disposed within the inner mold body for providing guidance for movement of the first and second mold halves. The folding inner die of the box girder can realize stable folding, can be separated from concrete stably, is convenient to operate, improves the dismantling efficiency of the inner die of the box girder, and improves the construction safety.

Description

Folding internal mold of box girder

Technical Field

The utility model relates to the technical field of building construction, in particular to a box girder folding inner die.

Background

The box girder is one of bridge engineering, the box girder of the reinforced concrete structure is divided into a cast-in-situ box girder and a prefabricated box girder, the cast-in-situ box girder is suitable for large continuous bridges, the prefabricated box girder is usually adopted for small box girders, namely, the unit box girder sections are prefabricated on independent sites, and then the box girder is erected on the foundation engineering by combining a bridge girder erection machine, so that the engineering progress can be accelerated, and the construction period is saved.

The inner templates of the prefabricated box girders are mainly in two forms of a rigid framework assembled wood template or a combined steel inner die, construction staff are required to enter the inner templates to dismantle the inner templates when the inner templates are dismantled, the operation intensity is high, air in the templates is thin, the construction staff is easy to lack oxygen, and the construction staff is easy to be injured. Thus patent CN218466364U discloses a folding internal mold for a concrete box girder, comprising a first half-width formwork and a second half-width formwork, both of which are provided in a folding structure, the second half-width formwork being provided opposite to the first half-width formwork in a first direction; the first half-width template and the second half-width template are in a folding state and an unfolding state, when the first half-width template and the second half-width template are in the unfolding state, the first half-width template and the second half-width template are spliced to form an integral structure for pouring the concrete box girder, and after the concrete box girder is poured, the first half-width template and the second half-width template are folded so as to facilitate the folding inner mold of the concrete box girder to be detached from the concrete box girder. Although the folding inner die can facilitate the dismantling of the inner die plate, the folding process of the first half die plate and the second half die plate is not stable enough, and the first half die plate and the second half die plate are easy to damage, so that the repeated use of the folding inner die is affected. Meanwhile, the adhesion area between the folded first half-width template and the second half-width template and the concrete is large, and great pulling force is needed when the folding internal mold is pulled out, so that the dismantling efficiency is affected.

Therefore, there is a need for a box girder folding inner mold to solve the above problems.

Disclosure of Invention

The utility model aims to provide a box girder folding internal mold which can realize stable folding, can be separated from concrete stably, is convenient to operate, improves the dismantling efficiency of the box girder internal mold and improves the construction safety.

To achieve the purpose, the utility model adopts the following technical scheme:

there is provided a box girder folding inner mold comprising:

the inner die body comprises a first half die plate and a second half die plate which are connected and oppositely arranged;

two folding structures, wherein one folding structure is respectively and correspondingly arranged at two connecting positions of the first half template and the second half template, the folding structures can be folded or unfolded, and simultaneously, the two folding structures are adjusted to enable the first half template and the second half template to move towards or away from each other so as to fold or unfold the inner die body;

and the guide assembly is arranged in the inner die body and is used for providing guide for the movement of the first half die plate and the second half die plate.

Preferably, the guide assembly comprises a guide sleeve and a guide rod, one of the first half die plate and the second half die plate is provided with the guide sleeve, the other one of the first half die plate and the second half die plate is provided with the guide rod, the guide rod extends along the moving direction of the first half die plate and the second half die plate, and one end of the guide rod is slidably arranged in the guide sleeve in a penetrating mode.

Preferably, the folding structure comprises a first connecting shaft, a first folding plate and a second folding plate, the first folding plate and the second folding plate are oppositely arranged on two sides of the first connecting shaft and are rotationally connected with the first connecting shaft, one end of the first folding plate, which is far away from the first connecting shaft, is rotationally connected with the first half die plate, one end of the second folding plate, which is far away from the first connecting shaft, is rotationally connected with the second half die plate, and the first connecting shafts of the two folding structures can be mutually close to or far away from each other so as to drive the two folding structures to be folded or unfolded simultaneously.

Preferably, the box girder folding inner die further comprises an adjusting assembly, the adjusting assembly is arranged in the inner die body, the first connecting shafts of the two folding structures are connected with the adjusting assembly, and the adjusting assembly is used for driving the two first connecting shafts to be close to or far away from each other.

Preferably, the adjusting component comprises a mounting cylinder, a sliding sleeve and two connecting rods, wherein the mounting cylinder is arranged on the inner wall of the first half template or the inner wall of the second half template, the mounting cylinder extends along the moving direction of the first half template and the second half template, the sliding sleeve is movably sleeved on the mounting cylinder, one ends of the two connecting rods are connected with the two first connecting shafts in one-to-one correspondence, the other ends of the two connecting rods are connected with the sliding sleeve in a rotating manner, and the sliding sleeve can drive the two first connecting shafts to be close to or far away from each other through movement.

Preferably, the mounting cylinder is further provided with a limiting member, and the limiting member is used for limiting the sliding sleeve on the mounting cylinder.

Preferably, the adjusting assembly further comprises a driving piece, the driving piece is arranged on the bottom wall of the mounting cylinder, and the output end of the driving piece is connected with the sliding sleeve and used for driving the sliding sleeve to move.

Preferably, the output end of the driving piece is provided with a first sliding plate and a second sliding plate relatively, a first guide groove and a second guide groove are arranged on the side wall of the mounting cylinder relatively along the extending direction of the side wall of the mounting cylinder, one end of the first sliding plate is arranged in a sliding mode in a penetrating mode in the first guide groove and is connected with the sliding sleeve, and one end of the second sliding plate is arranged in a sliding mode in the second guide groove in a penetrating mode and is connected with the sliding sleeve.

Preferably, a first connecting plate and a second connecting plate are respectively connected to two opposite sides of the first connecting shaft in a rotating manner, the first folding plate is connected with the first connecting plate, and the second folding plate is connected with the second connecting plate.

Preferably, the folding structure further comprises a second connecting shaft and a third connecting shaft, wherein the third connecting plate and the fourth connecting plate are rotatably arranged on two opposite sides of the second connecting shaft, the first half-formwork is connected with the third connecting plate, the first folding plate is far away from one end of the first connecting shaft and is connected with the fourth connecting plate, the fifth connecting plate and the sixth connecting plate are rotatably arranged on two opposite sides of the third connecting shaft, the second half-formwork is connected with the fifth connecting plate, and one end of the second folding plate far away from the first connecting shaft is connected with the sixth connecting plate.

The beneficial effects are that:

the box girder folding inner die provided by the utility model has the advantages that when the die is disassembled, the two folding structures are simultaneously adjusted to fold the inner die body, and after the inner die body is completely separated from concrete, the inner die body is pulled out, so that the operation is simple, and the die disassembling efficiency is high. Specifically, because the first half template and the second half template are connected and oppositely arranged, the two folding structures are respectively arranged at two connecting positions of the first half template and the second half template, namely, the two folding structures are oppositely arranged, so that when the two folding structures are simultaneously adjusted to be folded, the first half template and the second half template can be driven to move in opposite directions to fold the inner mould body, the first half template and the second half template are separated from concrete, and the inner mould body is convenient to dismantle. The guide component can provide a guide effect for the movement of the first half template and the second half template, so that the first half template and the second half template can stably move, and the first half template and the second half template can stably fold. In the process that first half template and second half template removed, first half template and second half template can break away from the concrete gradually, and when beta structure was folding completely, first half template and second half template were broken away from the concrete promptly completely to be convenient for pull out the centre form body, labour saving and time saving has improved the demolding efficiency. In addition, when the formwork is disassembled, constructors do not need to enter the inner part of the box girder inner mold, and can disassemble the box girder inner mold, so that the construction safety is improved.

Drawings

FIG. 1 is a schematic perspective view of a folding inner mold of a box girder provided by the utility model;

FIG. 2 is a partial view of the internal structure of the folding internal mold of the box girder provided by the present utility model;

FIG. 3 is an enlarged view at A in FIG. 2;

FIG. 4 is a side view of the folding inner mold of the box girder provided by the present utility model;

fig. 5 is a left side view of an adjustment assembly for a folding inner mold of a box girder provided by the present utility model.

In the figure:

1. an inner mold body; 11. a first half template; 12. a second half template;

2. a folding structure; 21. a first connecting shaft; 211. a first collar; 22. a first folding plate; 23. a second folding plate; 24. a second connecting shaft; 241. a second collar; 25. a third connecting shaft; 251. a third collar;

3. a guide assembly;

4. an adjustment assembly; 41. a mounting cylinder; 411. a limiting piece; 412. a first guide groove; 413. a second guide groove; 42. a sliding sleeve; 43. a connecting rod; 431. a spherical connecting part; 44. a driving member; 441. a first sliding plate; 442. and a second sliding plate.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The embodiment provides a folding centre form of case roof beam, can realize stable folding, can break away from the concrete simultaneously steadily, convenient operation improves the demolishment efficiency of case roof beam centre form, improves the security of being under construction. Referring to fig. 1 to 5, the box girder folding inner mold includes an inner mold body 1, two folding structures 2, and a guide assembly 3.

Wherein, the inner mould body 1 comprises a first half mould plate 11 and a second half mould plate 12 which are connected and oppositely arranged; two connecting positions of the first half template 11 and the second half template 12 are respectively and correspondingly provided with a folding structure 2, the folding structure 2 can be folded or unfolded, and simultaneously, the two folding structures 2 are adjusted to enable the first half template 11 and the second half template 12 to move towards or away from each other so as to fold or unfold the internal mold body 1. A guide assembly 3 is provided within the inner mould body 1 for providing guidance for the movement of the first and second mould halves 11, 12.

Referring to fig. 4, the box girder folding inner mold provided in this embodiment is capable of adjusting two folding structures 2 simultaneously when the mold is removed, so as to fold the inner mold body 1, and after the inner mold body 1 is completely separated from the concrete, the inner mold body 1 is pulled out, so that the operation is simple, and the mold removing efficiency is high. Specifically, since the first half formwork 11 and the second half formwork 12 are connected and oppositely arranged, the two folding structures 2 are respectively arranged at two connecting positions of the first half formwork 11 and the second half formwork 12, that is, the two folding structures 2 are oppositely arranged, so that when the two folding structures 2 are simultaneously adjusted to be folded, the first half formwork 11 and the second half formwork 12 can be driven to move oppositely to fold the inner formwork body 1, the first half formwork 11 and the second half formwork 12 are separated from concrete, and the inner formwork body 1 is convenient to dismantle. The guide assembly 3 can provide a guide effect for the movement of the first and second mold halves 11 and 12 so that the first and second mold halves 11 and 12 can be stably moved, thereby achieving stable folding of the first and second mold halves 11 and 12. In the process of moving the first half template 11 and the second half template 12, the first half template 11 and the second half template 12 can be gradually separated from concrete, and when the folding structure 2 is completely folded, the first half template 11 and the second half template 12 are completely separated from concrete, so that the inner die body 1 is conveniently pulled out, time and labor are saved, and the die stripping efficiency is improved. In addition, when the formwork is disassembled, constructors do not need to enter the inner part of the box girder inner mold, and can disassemble the box girder inner mold, so that the construction safety is improved.

Alternatively, referring to fig. 2 and 3, the folding structure 2 includes a first connection shaft 21, a first folding plate 22 and a second folding plate 23, the first folding plate 22 and the second folding plate 23 are disposed on two sides of the first connection shaft 21 relatively, and are both rotatably connected with the first connection shaft 21, one end of the first folding plate 22 away from the first connection shaft 21 is rotatably connected with the first half-formwork 11, one end of the second folding plate 23 away from the first connection shaft 21 is rotatably connected with the second half-formwork 12, and the first connection shafts 21 of the two folding structures 2 can be close to or far from each other to drive the two folding structures 2 to fold or unfold simultaneously. So configured, when the two first connecting shafts 21 approach each other, the two first connecting shafts 21 can respectively drive the first folding plate 22 corresponding to the first connecting shafts to rotate relative to the first half-formwork 11, and drive the second folding plate 23 to rotate relative to the second half-formwork 12, so that the first half-formwork 11 and the second half-formwork 12 can be pulled to move in a direction approaching or separating from each other, and the inner-formwork body 1 can be folded or unfolded.

Alternatively, the first connecting shaft 21 is rotatably connected to a first connecting plate and a second connecting plate at opposite sides thereof, the first folding plate 22 is connected to the first connecting plate, and the second folding plate 23 is connected to the second connecting plate. By this arrangement, the rotational connection of the first folding plate 22 and the first connecting shaft 21, and the rotational connection of the second folding plate 23 and the second connecting shaft 21 are realized, while the stability of the connection between the first folding plate 22 and the first connecting shaft 21 and between the second folding plate 23 and the first connecting shaft 21 can be improved. Specifically, the first connecting plate and the second connecting plate are both provided with a first collar 211, the first collar 211 is sleeved on the first connecting shaft 21 at intervals, and the first connecting plate and the second connecting plate are axially limited on the first connecting shaft 21, and the first connecting plate and the second connecting plate are both connected with the first connecting shaft 21 in a rotating manner through the corresponding first collar 211. Optionally, first annular protrusions are provided on the outer wall of the first connecting shaft 21 at both ends of the first collar 211, so that the first collar 211 is axially limited between the two first annular protrusions.

Further, the folding structure 2 further includes a second connecting shaft 24 and a third connecting shaft 25, the opposite sides of the second connecting shaft 24 are rotatably provided with a third connecting plate and a fourth connecting plate, the first half-formwork 11 is connected with the third connecting plate, one end of the first folding plate 22 far away from the first connecting shaft 21 is connected with the fourth connecting plate, the opposite sides of the third connecting shaft 25 are rotatably provided with a fifth connecting plate and a sixth connecting plate, the second half-formwork 12 is connected with the fifth connecting plate, and one end of the second folding plate 23 far away from the first connecting shaft 21 is connected with the sixth connecting plate. By this arrangement, the rotational connection of the first folding plate 22 with the first half die plate 11 and the rotational connection of the second folding plate 23 with the second half die plate 12 are realized, and the stability of the connection between the first folding plate 22 and the first half die plate 11 and between the second folding plate 23 and the second half die plate 12 is ensured.

Specifically, the third connecting plate and the fourth connecting plate are respectively provided with a second lantern ring 241, the second lantern rings 241 are sleeved on the second connecting shafts 24 at intervals, and are axially limited on the second connecting shafts 24, and the third connecting plate and the fourth connecting plate are respectively connected with the second connecting seat 24 in a rotating way through the corresponding second lantern rings 241; the fifth connecting plate and the sixth connecting plate are respectively provided with a third lantern ring 251, the third lantern ring 251 is sleeved on the third connecting shaft 25 at intervals, the axial limit is positioned on the third connecting shaft 25, and the fifth connecting plate and the sixth connecting plate are respectively connected with the second connecting shaft 25 in a rotating way through the corresponding third lantern ring 251. Optionally, second annular protrusions are disposed on the outer wall of the second connecting shaft 24 at two ends of the second collar 241, so that the second collar 241 is axially limited between the two second annular protrusions, and similarly, third annular protrusions are disposed on the outer wall of the third connecting shaft 25 at two ends of the third collar 251, so that the fifth collar 251 is axially limited between the two third annular protrusions.

Alternatively, referring to fig. 4, the guide assembly 3 includes a guide sleeve and a guide rod, one of the first half-form 11 and the second half-form 12 is provided with the guide sleeve, the other is provided with the guide rod, the guide rod extends along the moving direction of the first half-form 11 and the second half-form 12, and one end of the guide rod is slidably disposed through the guide sleeve. So set up, when adjusting beta structure 2 and making first half template 11 and second half template 12 to be close to each other the direction of moving, guide bar and guide sleeve take place the relative slip along first half template 11 and second half template 12's direction of movement promptly to provide the guide effect for first half template 11 and second half template 12's removal, guaranteed first half template 11 and second half template 12's stability of removal. Meanwhile, the support can be provided for the inner die body 1, and the stability of the structure of the inner die body 1 is improved. In the present embodiment, two guide members 3 are provided, and the two guide members 3 are provided at intervals along the height direction of the inner die body 1, so as to further improve the stability of the movement of the first half die plate 11 and the second half die plate 12. Of course, in other embodiments, a plurality of guide assemblies 3 may be disposed at intervals along the extending direction of the inner die body 1.

In another alternative embodiment, the guide assembly 3 may also be provided as a guide plate, one end of which is slidably arranged through the first half-form 11 and the other end of which is slidably arranged through the second half-form 12. When the folding structure 2 is in an unfolding state, the end faces at the two ends of the guide plate are respectively flush with the outer surfaces of the first half template 11 and the second half template 12, so that the stability of the concrete box girder structure after pouring is prevented from being influenced.

Optionally, the box girder folding inner mold further comprises an adjusting component 4, the adjusting component 4 is arranged in the inner mold body 1, the first connecting shafts 21 of the two folding structures 2 are connected with the adjusting component 4, and the adjusting component 4 is used for driving the two first connecting shafts 21 to be close to or far away from each other. So set up, can make the first connecting axle 21 of two beta structures 2 be close to each other or keep away from each other through adjusting the adjusting part 4 to can drive two beta structures 2 folding or expansion simultaneously, guarantee the uniformity of centre form body 1 folding action, adjust conveniently, it is efficient.

Further, the adjusting component 4 comprises a mounting cylinder 41, a sliding sleeve 42 and two connecting rods 43, the mounting cylinder 41 is arranged on the inner wall of the first half template 11 or the inner wall of the second half template 12, the mounting cylinder 41 extends along the moving direction of the first half template 11 and the second half template 12, the sliding sleeve 42 is movably sleeved on the mounting cylinder 41, one ends of the two connecting rods 43 are connected with the two first connecting shafts 21 in a one-to-one correspondence manner, the other ends of the two connecting rods 43 are connected with the sliding sleeve 42 in a rotating manner, and the sliding sleeve 42 can drive the two first connecting shafts 21 to be close to or far away from each other through movement. Since one end of the connecting rod 43 is rotatably connected with the sliding sleeve 42 and the other end is connected with the first connecting shaft 21, when the sliding sleeve 42 is driven to move, the sliding sleeve 42 can simultaneously drive the two first connecting shafts 21 to approach or separate from each other, so that the two folding structures 2 can be simultaneously driven to be folded or unfolded. The mounting cylinder 41 can provide a guiding function for the movement of the sliding sleeve 42, so that the stability of the movement of the sliding sleeve 42 is ensured.

Preferably, referring to fig. 4, one end of the connecting rod 43 is provided with a spherical connecting portion 431, the surface of the sliding sleeve 42 is correspondingly provided with a spherical groove, and the spherical connecting portion 431 is clamped into the corresponding spherical groove and is in running fit with the spherical groove. By the arrangement, the connecting rod 43 is connected with the sliding sleeve 42 in a rotating manner, so that the connecting rod 43 can rotate around the sliding sleeve 42 in a universal manner, interference between the connecting rod 43 and the sliding sleeve 42 is avoided, and the two first connecting shafts 21 can be driven to be close to or far from each other more stably.

Optionally, a limiting member 411 is further disposed on the mounting barrel 41, and the limiting member 411 is used for limiting the sliding sleeve 42 on the mounting barrel 41 of the mounting barrel 41. The limiting piece 411 can limit the moving stroke of the sliding sleeve 42, meanwhile, the sliding sleeve 42 is prevented from being separated from the mounting barrel 41, and the stability of the structure of the inner die body 1 is ensured. Alternatively, the limiting member 411 is a circular protrusion protruding on the outer wall of the mounting barrel 41. Referring to the orientation of fig. 4, in the initial position, the sliding sleeve 41 abuts against the limiting member 411, and the two folding structures 2 are in the unfolded state; when the sliding sleeve 43 is driven to move rightward, the two first connecting shafts can be close to each other, so that the first half template 11 and the second half template 12 are driven to move in the direction of approaching each other, and when the sliding sleeve 41 moves to abut against the side wall of the second half template 12, the two folding structures 2 are completely folded at this time, so that the inner mold body 1 is completely folded.

Optionally, referring to fig. 4 and 5, the adjusting assembly 4 further includes a driving member 44, where the driving member 44 is disposed on the bottom wall of the mounting cylinder 41, and the output end is connected to the sliding sleeve 42, for driving the sliding sleeve 42 to move. The sliding sleeve 42 can be driven to slide along the mounting cylinder 41 by adjusting the driving piece 44, so that the two folding structures 2 are simultaneously driven to be folded, and the adjustment is convenient. Alternatively, the driving member 44 is an electric telescopic rod, and the sliding sleeve 42 can be driven to move by adjusting a remote controller of the electric telescopic rod. Of course, in other embodiments, the driving member 44 may be a hydraulic telescopic rod, so long as the sliding sleeve 42 can be driven to move, and the present utility model is not limited to the case.

Further, the output end of the driving member 44 is relatively provided with a first sliding plate 441 and a second sliding plate 442, the sidewall of the mounting cylinder 41 is relatively provided with a first guiding slot 412 and a second guiding slot 413 along the extending direction thereof, one end of the first sliding plate 441 is slidably disposed in the first guiding slot 412 and connected to the sliding sleeve 42, and one end of the second sliding plate 442 is slidably disposed in the second guiding slot 413 and connected to the sliding sleeve 42. So set up, realized the sliding sleeve 42 and the output of driving piece 44 is connected, and first guide slot 412 and second guide slot 413 can provide the guide effect for the removal of sliding sleeve 42, guarantee the stability that sliding sleeve 42 removed.

In another alternative embodiment, the plurality of adjustment assemblies 4 are provided at intervals along the extending direction of the inner die body 1, and the plurality of adjustment assemblies 4 are driven to fold the inner die body 1.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. Folding centre form of case roof beam, its characterized in that includes:

the inner die body (1) comprises a first half die plate (11) and a second half die plate (12) which are connected and oppositely arranged;

two folding structures (2), wherein one folding structure (2) is correspondingly arranged at two connecting positions of the first half template (11) and the second half template (12), the folding structures (2) can be folded or unfolded, and simultaneously, the two folding structures (2) are adjusted to enable the first half template (11) and the second half template (12) to move towards or away from each other so as to fold or unfold the inner die body (1);

the guide assembly (3) is arranged in the inner die body (1) and is used for providing guidance for the movement of the first half die plate (11) and the second half die plate (12).

2. A folding inner mould of a girder according to claim 1, characterized in that the guiding assembly (3) comprises a guiding sleeve and a guiding rod, one of the first half mould plate (11) and the second half mould plate (12) is provided with the guiding sleeve, the other is provided with the guiding rod, the guiding rod extends along the moving direction of the first half mould plate (11) and the second half mould plate (12), and one end of the guiding rod is slidably arranged in the guiding sleeve.

3. The girder folding inner formwork according to claim 1, wherein the folding structure (2) comprises a first connecting shaft (21), a first folding plate (22) and a second folding plate (23), the first folding plate (22) and the second folding plate (23) are oppositely arranged at two sides of the first connecting shaft (21) and are rotationally connected with the first connecting shaft (21), one end of the first folding plate (22) away from the first connecting shaft (21) is rotationally connected with the first half formwork (11), one end of the second folding plate (23) away from the first connecting shaft (21) is rotationally connected with the second half formwork (12), and the first connecting shafts (21) of the two folding structures (2) can be mutually close to or far away from each other so as to drive the two folding structures (2) to fold or unfold simultaneously.

4. A box girder folding inner mould according to claim 3, characterized in that the box girder folding inner mould further comprises an adjusting assembly (4), the adjusting assembly (4) being arranged in the inner mould body (1), the first connecting shafts (21) of both folding structures (2) being connected to the adjusting assembly (4), the adjusting assembly (4) being arranged to drive both first connecting shafts (21) towards or away from each other.

5. The folding inner die of a box girder according to claim 4, wherein the adjusting component (4) comprises a mounting cylinder (41), a sliding sleeve (42) and two connecting rods (43), the mounting cylinder (41) is arranged on the inner wall of the first half-formwork (11) or the inner wall of the second half-formwork (12), the mounting cylinder (41) extends along the moving direction of the first half-formwork (11) and the second half-formwork (12), the sliding sleeve (42) is movably sleeved on the mounting cylinder (41), one ends of the two connecting rods (43) are connected with the two first connecting shafts (21) in a one-to-one correspondence manner, the other ends of the two connecting rods (43) are rotationally connected with the sliding sleeve (42), and the sliding sleeve (42) can drive the two first connecting shafts (21) to be close to or far away from each other through movement.

6. The folding inner die of the box girder according to claim 5, wherein a limiting piece (411) is further arranged on the mounting barrel (41), and the limiting piece (411) is used for limiting the sliding sleeve (42) on the mounting barrel (41).

7. The folding inner die of the box girder according to claim 5, wherein the adjusting assembly (4) further comprises a driving member (44), the driving member (44) is disposed on the bottom wall of the mounting cylinder (41), and an output end is connected to the sliding sleeve (42) for driving the sliding sleeve (42) to move.

8. The folding inner die for the box girder according to claim 7, wherein a first sliding plate (441) and a second sliding plate (442) are oppositely arranged at the output end of the driving member (44), a first guide groove (412) and a second guide groove (413) are oppositely arranged on the side wall of the mounting cylinder (41) along the extending direction of the side wall, one end of the first sliding plate (441) is slidably arranged in the first guide groove (412) in a penetrating manner and is connected with the sliding sleeve (42), and one end of the second sliding plate (442) is slidably arranged in the second guide groove (413) in a penetrating manner and is connected with the sliding sleeve (42).

9. A girder inner folding die according to any one of claims 3 to 8, wherein the first connecting shaft (21) is rotatably connected to a first connecting plate and a second connecting plate at opposite sides thereof, respectively, the first folding plate (22) is connected to the first connecting plate, and the second folding plate (23) is connected to the second connecting plate.

10. A girder folding inner mould according to any one of claims 3-8, wherein the folding structure (2) further comprises a second connecting shaft (24) and a third connecting shaft (25), wherein the third connecting plate and the fourth connecting plate are rotatably arranged on two opposite sides of the second connecting shaft (24), the first half mould plate (11) is connected with the third connecting plate, one end of the first folding plate (22) far away from the first connecting shaft (21) is connected with the fourth connecting plate, the fifth connecting plate and the sixth connecting plate are rotatably arranged on two opposite sides of the third connecting shaft (25), the second half mould plate (12) is connected with the fifth connecting plate, and one end of the second folding plate (23) far away from the first connecting shaft (21) is connected with the sixth connecting plate.