CN220699974U - Internal mold structure of box girder demolding mold - Google Patents

Abstract

The utility model relates to an internal mold structure of a box girder demolding mold, which comprises a forming mold with the length direction parallel to the length direction of a prefabricated part, wherein the forming mold comprises a first mold and a second mold, the first mold and the second mold form a hollow part of the hollow prefabricated part, the first mold comprises a first lower mold and a first upper mold hinged on the first lower mold, and a first supporting mechanism for supporting the first upper mold is arranged on the first lower mold; the second die comprises a second lower die and a second upper die hinged on the second lower die, and a second supporting mechanism for supporting the second upper die is arranged on the second lower die. According to the die, the first upper die and the second upper die are supported through the first supporting mechanism and the second supporting mechanism respectively, stability of the forming die after stress is improved, and accordingly the possibility of die collapse is reduced.

Description

Internal mold structure of box girder demolding mold

Technical Field

The application relates to the technical field of prefabricated part production equipment, in particular to an internal mold structure of a box girder demolding mold.

Background

Compared with a solid prefabricated part with the same outline size, the hollow prefabricated part can save a large amount of concrete on the premise of meeting the requirement of bearing capacity, thereby reducing the cost of producing the prefabricated part.

In the prior art, hollow prefabricated parts are usually produced by placing a core mould in a mould of the prefabricated part, pouring cement, and finally pulling out the core mould, so that a cavity is formed in the prefabricated part. The core mold usually comprises an inner rigid mold and an outer flexible mold, the flexible mold is propped or contracted along with the rigid mold, when the hollow prefabricated component is manufactured, the flexible mold occupies a larger space along with the rigid mold, when the hollow prefabricated component is manufactured, the core mold needs to be taken out, the flexible mold is contracted along with the rigid mold and then is reduced in size, and at the moment, the core mold is separated from the inner wall of the hollow prefabricated component, so that the flexible mold is convenient to take out.

The problem in the prior art is that the flexible mould is easy to puncture in the use, leads to the fact the mandrel can't be used repeatedly, and in producing large-scale case roof beam mould, stability is relatively poor, the possibility that collapses can appear.

Disclosure of Invention

In order to improve the stability of drawing of patterns mould centre form structure, reduce the possibility that the mould collapses in the use, this application provides a centre form structure of case roof beam drawing of patterns mould.

The application provides an interior mould structure of case roof beam drawing of patterns mould adopts following technical scheme:

the inner die structure of the box girder demolding die comprises a forming die with the length direction parallel to the length direction of the prefabricated part, wherein the forming die comprises a first die and a second die, the first die and the second die form a hollow part of the hollow prefabricated part, the first die comprises a first lower die and a first upper die hinged on the first lower die, and a first supporting mechanism for supporting the first upper die is arranged on the first lower die; the second die comprises a second lower die and a second upper die hinged on the second lower die, and a second supporting mechanism for supporting the second upper die is arranged on the second lower die.

By adopting the technical scheme, when the hollow prefabricated part is required to be poured, the first upper die and the second upper die are rotated, so that a hollow part of the hollow prefabricated part is formed between the first die and the second die, the first upper die is supported by the first supporting mechanism, and the second upper die is supported by the second supporting mechanism; after the strength of the poured concrete reaches, firstly releasing the support of the first supporting mechanism on the first upper die, and rotating the first upper die to ensure that the first upper die is not abutted against the concrete prefabricated part;

then releasing the support of the second upper die by the second support mechanism, rotating the second upper die so that the second upper die is not abutted against the concrete prefabricated part any more, and then taking out the forming die from the hollow part of the prefabricated part; in operation, the first upper die and the second upper die are respectively supported by the first supporting mechanism and the second supporting mechanism, so that stability of the forming die after being stressed is improved, and the possibility of die collapse is reduced.

Preferably, the first supporting mechanism comprises a plurality of groups of first supporting components, and the plurality of groups of first supporting components are distributed along the length direction of the first die;

the second supporting mechanism comprises a plurality of groups of second supporting components, and the plurality of groups of second supporting components are distributed along the length direction of the second die.

Through adopting above-mentioned technical scheme, a plurality of first supporting component of group support the first mould all the time in the concrete placement process, a plurality of second supporting component of group support the second mould all the time, and the stability that the multiunit supporting component's setting was favorable to improving the support.

Preferably, the first support assembly includes a first lower plate, a first upper plate and a first hinge member, the first lower plate is hinged on the first lower die and is vertically arranged, a rotation axis of the first lower plate is horizontally arranged and is vertical to a length direction of the first die, one end of the first upper plate is hinged on the first lower plate through the first hinge member, the other end of the first upper plate is hinged on the first upper die, and the first upper plate is vertically arranged;

the second support assembly comprises a second lower plate, a second upper plate and a second hinging member, wherein the second lower plate is hinged to the second lower die and is vertically arranged, the rotation axis of the second lower plate is parallel to the rotation axis of the first lower plate, one end of the second upper plate is hinged to the second lower plate through the second hinging member, the other end of the second upper plate is hinged to the second upper die, and the second upper plate is vertically arranged.

By adopting the technical scheme, when the first lower plate and the first upper plate are in the vertical state, the first upper die is supported, and similarly, when the second lower plate and the second upper plate are in the vertical state, the second upper die is supported; after the concrete strength of pouring completion reaches, can drive the one end that first lower plate kept away from first lower mould to the direction rotation that is close to the interior diapire of first lower mould, the motion of first lower plate drives first upper plate motion to can drive first upper mould and break away from prefabricated component.

After the first upper die rotates, one end of the second lower plate, which is far away from the second lower die, is driven to rotate towards the direction close to the second lower die, and the second upper plate is driven to move by the movement of the second lower plate, so that the second upper die can be driven to be separated from the prefabricated component.

Preferably, the first supporting mechanism further comprises a first shaft plate, the length direction of the first shaft plate is parallel to the length direction of the first die, the first lower plates are all hinged with the first shaft plate through first hinging members, and the first shaft plate is positioned on one side of the first lower plates far away from the first upper plate;

the second support mechanism further comprises a second shaft plate, the second shaft plate is parallel to the first shaft plate, the second lower plates are hinged with the second shaft plate through second hinging members, and the second shaft plate is located on one side, far away from the second upper plate, of the second lower plates.

By adopting the technical scheme, the first shaft plate is convenient to set and simultaneously drives the first lower plates to move, and when the first shaft plate is dragged to move, the first lower plates can be driven to move;

the second shaft plate is convenient to set and simultaneously drives the second lower plates to move, and when the second shaft plate is dragged to move, the second lower plates can be driven to move, so that the structure is reasonable and the operation is simple.

Preferably, the two ends of the first shaft plate are provided with first traction plates, the first traction plates are positioned at the two ends of the first die, and the first traction plates are provided with first traction holes;

the two ends of the second shaft plate are respectively provided with a second traction plate, the second traction plates are positioned at the two ends of the second die, and second traction holes are formed in the second traction plates.

By adopting the technical scheme, the manual pulling of the shaft plate requires larger force, and the traction plate is convenient for the winch to pull the shaft plate to move.

Preferably, the first hinge member includes a first bolt and a first nut, and the first bolt sequentially passes through the first shaft plate, the first lower plate and the first upper plate and is in threaded connection with the first nut;

the second hinge member includes a second bolt and a second nut, and the second bolt passes through the second shaft plate, the second lower plate and the second upper plate in sequence and is in threaded connection with the second nut.

Through the adoption of the technical scheme, the first shaft plate, the first lower plate and the first upper plate are sequentially arranged on the first bolt in a penetrating manner, and the first nut is connected to the first bolt in a threaded manner, so that coaxial hinging of the first shaft plate, the first lower plate and the first upper plate can be realized;

the second shaft plate, the second lower plate and the second upper plate sequentially penetrate through the second bolt, and the second nut is connected to the second bolt in a threaded mode to realize coaxial hinging of the second shaft plate, the second lower plate and the second upper plate.

Preferably, a connecting mechanism is arranged on the first die and used for connecting the first die and the second die.

Through adopting above-mentioned technical scheme, first mould and second mould are in the same place through coupling mechanism connection, coupling mechanism's setting is favorable to further improving the stability of forming die pouring in-process.

Preferably, the connecting mechanism comprises a plurality of groups of connecting components, the plurality of groups of connecting components are distributed along the length direction of the first die, the connecting components comprise a first connecting bolt, a second connecting bolt and a screw rod, a first lower prism is arranged on the side wall, close to the second lower die, of the first lower die, a second lower prism is arranged on the second lower die, the second lower prism is positioned on the lower side of the first lower prism, and the first connecting bolt is arranged on the second lower prism; the first upper die is provided with a first upper prism on the side wall close to the second upper die, the second upper die is provided with a second upper prism, the second upper prism is located on the upper side of the first upper prism, the second connecting bolt is arranged on the second upper prism, and the screw rod sequentially penetrates through the second upper prism, the first lower prism, the second lower prism and the second connecting bolt to be in threaded connection with the first connecting bolt.

Through adopting above-mentioned technical scheme, after first mould and second mould formed hollow prefabricated component's hollow, let the screw rod pass in proper order on the second prism, first prism, second connecting bolt, first prism and second prism down, when the screw rod conflict in first connecting bolt, operating personnel presses first mould and second upward mould and continue to rotate the screw rod to the direction that is close to first bolt, until screw rod threaded connection is on first bolt, can be in the same place the second upward mould, first lower mould and second lower mould are fixed, improve the stability of supporting, play the fine setting effect on second upward mould and first upward mould simultaneously, reduce the clearance between mould and the first upward mould on the second.

In summary, the present application includes at least one of the following beneficial technical effects:

1. in operation, the first supporting component of multiunit, second supporting component support first mould, second respectively and go up the mould, are favorable to improving the stability after the shaping mould atress to reduce the possibility that the mould collapses.

2. The setting of first arbor board conveniently drives the motion of polylith first hypoplastron simultaneously, and the setting of second arbor board conveniently drives polylith second hypoplastron motion simultaneously, improves work efficiency.

3. The stability of forming die pouring in-process is favorable to further improving to coupling mechanism's setting, simultaneously, plays the fine setting effect to second upper die and first upper die, reduces the clearance between second upper die and the first upper die.

Drawings

Fig. 1 is a schematic overall structure of an embodiment of the present application.

Fig. 2 is a perspective cross-sectional view of the first die of fig. 1.

FIG. 3 is a schematic diagram of the connection assembly of FIG. 1 in connection with a first die and a second die.

Fig. 4 is a perspective cross-sectional view of the second die of fig. 1.

Reference numerals illustrate:

11. a first die; 111. a first lower die; 112. a first upper die; 113. a first lower prism; 114. a first upper prism; 115. a third hinge member; 1151. a first hinge shaft; 1152. a first pin; 1153. a first plate; 1154. a second plate; 116. a first connector; 1161. a first connection base; 1162. a first connecting rod; 1163. a first connection plate; 12. a second die; 121. a second lower die; 122. a second upper die; 123. a second lower prism; 124. a second upper prism; 125. a fourth hinge member; 1251. a second hinge shaft; 1252. a second pin; 1253. a third plate; 1254. a fourth plate; 126. a second connector; 1261. a second connecting seat; 1262. a second connecting rod; 1263. a second connecting plate; 21. a first support assembly; 211. a first lower plate; 212. a first upper plate; 213. a first hinge member; 2131. a first bolt; 2132. a first nut; 22. a second support assembly; 221. a second lower plate; 222. a second upper plate; 223. a second hinge member; 2231. a second bolt; 2232. a second nut; 23. a first shaft plate; 231. a first traction plate; 24. a second axle plate; 241. a second traction plate; 31. a connection assembly; 311. a first connecting bolt; 312. a second connecting bolt; 313. and (3) a screw.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-4.

The embodiment of the application discloses interior mould structure of case roof beam drawing of patterns mould, refer to fig. 1, including the forming die that length direction and prefabricated component length direction are parallel, forming die includes first mould 11 and second mould 12, and first mould 11 is used for forming the hollow portion of hollow prefabricated component with second mould 12.

Referring to fig. 1 and 2, the first mold 11 includes a first lower mold 111 and a first upper mold 112 that are horizontally disposed, a third hinge member 115 is disposed on an inner sidewall of the first lower mold 111, the first upper mold 112 is hinged on the first lower mold 111 through the third hinge member 115, the third hinge member 115 includes a first hinge shaft 1151, two first pins 1152, a plurality of first plates 1153 and a plurality of second plates 1154, the plurality of first plates 1153 are fixedly connected on the inner sidewall of the first lower mold 111 and distributed along a length direction of the first lower mold 111, and the first plates 1153 are obliquely disposed and gradually rise along a direction inclined away from the first lower mold 111.

Referring to fig. 1 and 2, the first upper mold 112 is horizontally disposed and located above the first lower mold 111, the plurality of second plates 1154 are fixedly connected to the inner side walls of the first upper mold 112 and are in one-to-one correspondence with the first plates 1153, the second plates 1154 are obliquely disposed and gradually lower in inclined height along a direction close to the first lower mold 111, the side walls of the lowest ends of the second plates 1154 abut against the first plates 1153, the first hinge shafts 1151 penetrate the first plates 1153 and the second plates 1154, and the axial directions of the first hinge shafts 1152 are parallel to the length direction of the first lower mold 111, and the two ends of the first hinge shafts 1151 are in one-to-one correspondence with each other and are inserted on the first hinge shafts 1151.

Referring to fig. 2 and 3, a first supporting mechanism is disposed on the first lower mold 111, the first supporting mechanism includes a first shaft plate 23 and a plurality of groups of first supporting components 21, the plurality of groups of first supporting components 21 are uniformly distributed along the length direction of the first mold 11, the first supporting components 21 include a first lower plate 211, a first upper plate 212 and a first hinge member 213, a first connecting piece 116 is disposed on the first lower mold 111, the first lower plate 211 is hinged on the inner bottom wall of the first lower mold 111 through the first connecting piece 116, the first connecting piece 116 includes a first connecting seat 1161, a first connecting rod 1162 and a first connecting plate 1163, the first connecting seat 1161 is fixedly connected on the inner bottom wall of the first lower mold 111, the first connecting rod 1162 is fixedly connected with the first connecting seat 1161 and is horizontally disposed, the first connecting plate 1163 is fixedly connected on the side wall of the first connecting rod 1162 and is vertically disposed, the first lower plate 211 is hinged on the side wall of the first connecting plate 1163 close to the first hinge shaft 1 and is vertically disposed, and the rotation axis of the first lower plate 211 is horizontally disposed and is perpendicular to the length direction of the first lower mold 111.

Referring to fig. 2 and 3, the first upper plate 212 is disposed at a side of the first lower plate 211 far from the first hinge shaft 1151 and vertically, a sidewall of the first upper plate 212 is abutted against a sidewall of the first lower plate 211, a length direction of the first shaft plate 23 is parallel to a length direction of the first lower plate 111 and the sidewall is abutted against the sidewall of the first lower plate 211, the first hinge member 213 includes a first bolt 2131 and a first nut 2132, the first bolt 2131 sequentially passes through the first shaft plate 23, the first lower plate 211 and the first upper plate 212, the first nut 2132 is in threaded connection with the first bolt 2131 and is disposed at a side of the first upper plate 212 far from the first lower plate 211, and one end of the first upper plate 212 far from the first lower plate 211 is hinged on the first upper die 112; the side walls at two ends of the first shaft plate 23 are fixedly connected with first traction plates 231, the first traction plates 231 are positioned at two sides of the port of the first lower die 111, the length direction of the first traction plates 231 is parallel to the length direction of the first shaft plate 23, and first traction holes are formed in the side walls.

Referring to fig. 1 and 3, the second mold 12 is located at one side of the first mold 11, the second mold 12 includes a second lower mold 121 and a second upper mold 122 that are horizontally disposed, a first lower prism 113 is fixedly connected to a side wall of the first lower mold 111, the first lower prism 113 is a rectangular prism, the length direction is parallel to the length direction of the first lower mold 111, the inclined height of the inclined surface of the first lower prism 113 increases gradually along the direction close to the second lower mold 121, a hollow second lower prism 123 is fixedly connected to the side wall of the second lower mold 121 close to the first lower mold 111, and the second lower prism 123 is a rectangular prism and the inclined surface of the second lower prism 123 is in contact with the inclined surface of the first lower prism 113.

Referring to fig. 1 and 4, a fourth hinge member 125 is disposed on an inner sidewall of the second lower mold 121, the second upper mold 122 is hinged to the second lower mold 121 through the fourth hinge member 125, the fourth hinge member 125 includes a second hinge shaft 1251, two second pins 1252, a plurality of third plates 1253, and a plurality of fourth plates 1254, the plurality of third plates 1253 are fixedly connected to the inner sidewall of the second lower mold 121 and distributed along a length direction of the second lower mold 121, and the third plates 1253 are obliquely disposed and gradually rise in an inclined height direction away from the second lower mold 121;

referring to fig. 3 and 4, the second upper mold 122 is horizontally disposed and located above the first lower mold 111, a plurality of fourth plates 1254 are fixedly connected to the inner side walls of the second upper mold 122 and are in one-to-one correspondence with the third plates 1253, the fourth plates 1254 are obliquely disposed and gradually lower in inclined height along a direction close to the second lower mold 121, the side walls of the lowest ends of the fourth plates 1254 are abutted against the side walls of the third plates 1253, the second hinge shafts 1251 penetrate the third plates 1253 and the fourth plates 1254 and are parallel to the first hinge shafts 1151, and the second pin shafts 1252 are in one-to-one correspondence with the two ends of the second hinge shafts 1251 and are inserted on the second hinge shafts 1251.

Referring to fig. 3 and 4, a second supporting mechanism is disposed on the second lower die 121, the second supporting mechanism includes a second axle 24 and a plurality of groups of second supporting components 22, the plurality of groups of second supporting components 22 are uniformly distributed along the length direction of the second die 12, the second supporting components 22 include a second lower plate 221, a second upper plate 222 and a second hinge member 223, a second connecting piece 126 is disposed on the second lower die 121, the second lower plate 221 is hinged on the inner bottom wall of the second lower die 121 through the second connecting piece 126, the second connecting piece 126 includes a second connecting seat 1261, a second connecting rod 1262 and a second connecting plate 1263, the second connecting seat 1261 is fixedly connected on the inner bottom wall of the second lower die 121, the second connecting rod 1262 is fixedly connected with the second connecting seat 1261 and is horizontally disposed, the second connecting plate 1263 is fixedly connected on the side wall of the second connecting rod 1262 and is vertically disposed, the second lower plate 221 is hinged on the side wall of the second connecting plate 1263 and is vertically disposed near the second hinge shaft 1251, and the second lower plate is horizontally disposed along the length direction of the second lower die 121.

Referring to fig. 3 and 4, the second upper plate 222 is disposed at a side of the second lower plate 221 remote from the second hinge shaft 1251 and vertically, a sidewall of the second upper plate 222 is abutted against a sidewall of the second lower plate 221, the second shaft plate 24 is parallel to the first shaft plate 23 and the sidewall is abutted against the sidewall of the second lower plate 221, the second hinge member 223 includes a second bolt 2231 and a second nut 2232, the second bolt 2231 sequentially passes through the second shaft plate 24, the second lower plate 221 and the second upper plate 222, the second nut 2232 is in threaded connection with the second bolt 2231 and is disposed at a side of the second upper plate 222 remote from the second lower plate 221, and an end of the second upper plate 222 remote from the second lower plate 221 is hinged on the second upper die 122; the side walls at two ends of the second shaft plate 24 are fixedly connected with second traction plates 241, the second traction plates 241 are positioned at two sides of the port of the second lower die 121, and the second traction plates 241 are parallel to the first traction plates 231 and are provided with second traction holes.

Referring to fig. 1 and 3, a first upper prism 114 is fixedly connected to a sidewall of the first upper mold 112 adjacent to the second upper mold 122, the first upper prism 114 is a rectangular prism, the length direction of the first upper prism is parallel to the length direction of the first upper mold 112, the inclined height of the inclined surface of the first upper prism 114 gradually decreases along the direction adjacent to the second upper mold 122, a hollow second upper prism 124 is fixedly connected to a sidewall of the second upper mold 122 adjacent to the first upper mold 112, and the second upper prism 124 is a rectangular prism, and the inclined surface of the second upper prism 124 is in contact with the inclined surface of the first upper prism 114.

Referring to fig. 1 and 3, a connection mechanism is disposed on the second lower prism 123, the connection mechanism includes a plurality of groups of connection assemblies 31, the plurality of groups of connection assemblies 31 are distributed along the length direction of the first mold 11, the connection assemblies 31 include a first connection bolt 311, a second connection bolt 312 and a screw 313, the first connection bolt 311 is fixedly connected to the inner bottom wall of the second lower prism 123, the second connection bolt 312 is fixedly connected to the inner top wall of the second upper prism 124, and the screw 313 sequentially passes through the second upper prism 124, the first upper prism 114, the first lower prism 113, the second lower prism 123 and is in threaded connection with the second connection bolt 312 and the first connection bolt 311.

The implementation principle of the internal mold structure of the box girder demolding mold provided by the embodiment of the application is as follows:

before the hollow prefabricated component needs to be poured, an operator pushes the second shaft plate 24 to move, the second shaft plate 24 moves to drive the second lower plate 221 to move, the second lower plate 221 moves to drive the second upper plate 222 to move until the second upper plate 222 is in a vertical state, and the second upper plate 222 moves to drive the second upper die 122 to rotate around the second hinge shaft 1251; pushing the first shaft plate 23 to move, wherein the movement of the first shaft plate 23 drives the first lower plate 211 to move, and the movement of the first lower plate 211 drives the first upper plate 212 to move until the first upper plate 212 is in a vertical state, and the movement of the first upper plate 212 drives the first upper die 112 to move; when the first upper plate 212 and the second upper plate 222 are in the vertical state, the first mold 11 and the second mold 12 form a hollow portion of the hollow preform.

Then, the operator lets the screw 313 pass through the second upper prism 124, the first upper prism 114, the second connecting bolt 312, the first lower prism 113 and the second lower prism 123 in sequence, when the screw 313 abuts against the first connecting bolt 311, the operator presses the first upper mold 112 and the second upper mold 122 in a direction close to the first bolt 2131 and continues to rotate the screw 313 until the screw 313 is in threaded connection with the first bolt 2131, and then the casting of the concrete prefabricated part can be performed.

After the poured concrete is placed for a period of time, screwing the screw 313 out of the top of the prefabricated part, dragging the first shaft plate 23 to move through a winch after the strength of the poured concrete is reached, wherein the movement of the first shaft plate 23 drives the hinged ends of the first lower plate 211 and the first upper plate 212 to move in the direction close to the inner bottom wall of the first lower die 111, and the first upper plate 212 drives the first upper die 112 to rotate, so that the first upper die 112 is separated from the concrete prefabricated part; then, the second shaft plate 24 is dragged to move by the winch, the movement direction of the second shaft plate 24 is the same as the movement direction of the first shaft plate 23, the movement of the second shaft plate 24 drives the hinged end of the second lower plate 221 and the second upper plate 222 to move towards the direction close to the inner bottom wall of the second lower die 121, and the second upper plate 222 drives the second upper die 122 to rotate, so that the second upper die 122 is separated from the concrete prefabricated part, and then the forming die can be dragged away from the hollow part of the concrete prefabricated part.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (8)

1. An interior mould structure of case roof beam drawing of patterns mould, its characterized in that: the forming die comprises a first die (11) and a second die (12), wherein the length direction of the forming die is parallel to the length direction of the prefabricated part, the first die (11) and the second die (12) form a hollow part of the hollow prefabricated part, the first die (11) comprises a first lower die (111) and a first upper die (112) hinged to the first lower die (111), and a first supporting mechanism for supporting the first upper die (112) is arranged on the first lower die (111); the second die (12) comprises a second lower die (121) and a second upper die (122) hinged on the second lower die (121), and a second supporting mechanism for supporting the second upper die (122) is arranged on the second lower die (121).

2. The internal mold structure of a box girder demolding mold according to claim 1, characterized in that: the first supporting mechanism comprises a plurality of groups of first supporting components (21), and the groups of first supporting components (21) are distributed along the length direction of the first die (11);

the second support mechanism comprises a plurality of groups of second support assemblies (22), and the plurality of groups of second support assemblies (22) are distributed along the length direction of the second die (12).

3. The internal mold structure of a box girder demolding mold according to claim 2, characterized in that: the first support assembly (21) comprises a first lower plate (211), a first upper plate (212) and a first hinging member (213), wherein the first lower plate (211) is hinged on the first lower die (111) and is vertically arranged, the rotation axis of the first lower plate (211) is horizontally arranged and is vertical to the length direction of the first die (11), one end of the first upper plate (212) is hinged on the first lower plate (211) through the first hinging member (213), the other end of the first upper plate (212) is hinged on the first upper die (112), and the first upper plate (212) is vertically arranged;

the second support assembly (22) comprises a second lower plate (221), a second upper plate (222) and a second hinging member (223), wherein the second lower plate (221) is hinged to the second lower die (121) and is vertically arranged, the rotation axis of the second lower plate (221) is parallel to the rotation axis of the first lower plate (211), one end of the second upper plate (222) is hinged to the second lower plate (221) through the second hinging member (223), the other end of the second upper plate is hinged to the second upper die (122), and the second upper plate (222) is vertically arranged.

4. An internal mold structure of a box girder demolding mold according to claim 3, characterized in that: the first supporting mechanism further comprises a first shaft plate (23), the length direction of the first shaft plate (23) is parallel to the length direction of the first die (11), the first lower plates (211) are hinged with the first shaft plate (23) through first hinging members (213), and the first shaft plate (23) is positioned on one side of the first lower plates (211) away from the first upper plates (212);

the second support mechanism further comprises a second shaft plate (24), the second shaft plate (24) is parallel to the first shaft plate (23), the second lower plates (221) are hinged with the second shaft plate (24) through second hinging members (223), and the second shaft plate (24) is located on one side, far away from the second upper plates (222), of the second lower plates (221).

5. The internal mold structure of a box girder demolding mold as claimed in claim 4, wherein: the two ends of the first shaft plate (23) are provided with first traction plates (231), the first traction plates (231) are positioned at the two ends of the first die (11), and first traction holes are formed in the first traction plates (231);

the two ends of the second shaft plate (24) are respectively provided with a second traction plate (241), the second traction plates (241) are positioned at the two ends of the second die (12), and the second traction plates (241) are provided with second traction holes.

6. The internal mold structure of a box girder demolding mold as claimed in claim 4, wherein: the first hinge member (213) comprises a first bolt (2131) and a first nut (2132), wherein the first bolt (2131) sequentially passes through the first shaft plate (23), the first lower plate (211) and the first upper plate (212) and is in threaded connection with the first nut (2132);

the second hinge member (223) includes a second bolt (2231) and a second nut (2232), and the second bolt (2231) sequentially passes through the second shaft plate (24), the second lower plate (221), and the second upper plate (222) and is screw-coupled with the second nut (2232).

7. The internal mold structure of a box girder demolding mold according to claim 1, characterized in that: the first die (11) is provided with a connecting mechanism which is used for connecting the first die (11) with the second die (12).

8. The internal mold structure of a box girder demolding mold as claimed in claim 7, wherein: the connecting mechanism comprises a plurality of groups of connecting components (31), the plurality of groups of connecting components (31) are distributed along the length direction of a first die (11), the connecting components (31) comprise a first connecting bolt (311), a second connecting bolt (312) and a screw (313), a first lower prism (113) is arranged on the side wall, close to a second lower die (121), of the first lower die (111), a second lower prism (123) is arranged on the second lower die (121), the second lower prism (123) is located on the lower side of the first lower prism (113), and the first connecting bolt (311) is arranged on the second lower prism (123); the first upper die (112) is provided with a first upper prism (114) on the side wall close to the second upper die (122), the second upper prism (124) is arranged on the second upper die (122), the second upper prism (124) is located on the upper side of the first upper prism (114), the second connecting bolt (312) is arranged on the second upper prism (124), and the screw (313) sequentially penetrates through the second upper prism (124), the first upper prism (114), the first lower prism (113) and the second lower prism (123) and is in threaded connection with the second connecting bolt (312) and the first connecting bolt (311).