CN214394677U - Detachable mould that steel pipe concrete sleeper was prefabricated and is used - Google Patents

Abstract

The utility model particularly relates to a detachable mould of prefabricated usefulness of steel pipe concrete sleeper has solved the problem of recess shaping difficulty when the steel pipe concrete sleeper is prefabricated. A separable mould for prefabricating a steel pipe concrete sleeper is characterized in that two outer mould devices are arranged in an inner cavity of a rectangular groove, inner mould devices are arranged on the upper portions of the outer mould devices, and the inner mould devices and the outer mould devices are detachably connected through a connecting mechanism; the outer mold device comprises an outer mold groove, a steel pipe positioning hole, a U-shaped limiting plate, a lower positioning plate and a lower arc-shaped groove; the inner die device comprises an upper positioning plate, an L-shaped inner die plate, an upper arc-shaped groove and a groove positioning strip; the connecting mechanism comprises an inverted T-shaped rotating rod, vertical clamping strips are arranged between the ear plates, and C-shaped clamping grooves are formed between the vertical clamping strips. The utility model discloses a concrete filled steel tube sleeper recess one shot forming's purpose has improved concrete filled steel tube sleeper's production efficiency and concrete filled steel tube sleeper's production quality, can regard as the prefabricated design frock of concrete filled steel tube sleeper.

Description

Detachable mould that steel pipe concrete sleeper was prefabricated and is used

Technical Field

The utility model relates to a mould for the railway construction specifically is a prefabricated detachable mould of usefulness of steel pipe concrete sleeper.

Background

In order to break through the patent technology barriers of foreign truss reinforced sleepers, a concrete filled steel tube (CFT) sleeper type ballastless track structure is independently developed in China and mainly comprises steel rails, fasteners, prefabricated CFT sleepers, cast-in-place track beds and the like, wherein the prefabrication of the CFT sleepers is one of the key technologies of construction.

Two concrete sleeper blocks of CFT sleeper are connected with two steel pipe concretes, set up 3 door type reinforcing bars and 1 stirrup in the sleeper block, and the door type reinforcing bar welds with the long limit outside of steel pipe lateral wall and stirrup respectively. In order to optimize the connection performance between the sleeper and the track bed, semicircular grooves are respectively formed in three side faces of a sleeper block, and the structural schematic diagram of the CFT sleeper is shown in figures 2-5.

Practice shows, however, because traditional sleeper block side does not have the recess, its mould adopts the smooth integral type steel mould in surface, and the CFT sleeper adopts traditional steel mould can't form the recess because the sleeper side is fluted, leads to the production that current sleeper mould can't be used for the CFT sleeper, at present, does not have the prefabricated CFT sleeper that relevant mould can convenient and fast, guarantor's quality and quantity, is unfavorable for the research popularization of CFT pillow ballastless track structure domestically. Based on this, to the CFT sleeper of independently developing, combine the actual manufacturing of sleeper, the operating mode that the construction produced carries out mould development, need develop a novel prefabricated mould of CFT sleeper to make the sleeper take shape the trailing flank and form the recess, accord with the design requirement.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a recess shaping difficult problem when solving the concrete filled steel tube sleeper prefabrication provides a prefabricated detachable mould of usefulness of concrete filled steel tube sleeper.

The utility model discloses an adopt following technical scheme to realize:

a separable mould for prefabricating a concrete-filled steel tube sleeper comprises a rectangular groove with an upward notch and a transverse position, wherein handles are fixed on the left outer side wall and the right outer side wall of the rectangular groove; the inner cavity of the rectangular groove is provided with two outer die devices which are distributed left and right, a distance is reserved between the two outer die devices, the upper part of each outer die device is provided with an inner die device, and the inner die device and the outer die devices are detachably connected through a connecting mechanism;

the outer die device comprises an outer die groove with an upward notch and an outer bottom wall fixed on the inner bottom wall of the rectangular groove, and operating gaps are reserved between the front outer side wall of the outer die groove and the front inner side wall of the rectangular groove and between the rear outer side wall of the outer die groove and the rear inner side wall of the rectangular groove; the left outer side wall of the outer die groove positioned on the left side and the right outer side wall of the outer die groove positioned on the right side are respectively fixed on the left inner side wall and the right inner side wall of the rectangular groove; two sleeve positioning rods distributed left and right are vertically fixed on the inner bottom walls of the two outer die cavities, two steel pipe positioning holes distributed front and back are formed in the opposite side walls in a penetrating mode, and the steel pipe positioning holes are communicated with the notches of the outer die cavities; the steel pipe positioning holes of the two outer die cavities are right-left opposite, and the lower parts of the steel pipe positioning holes are in an arc shape matched with the shape of the lower parts of the steel pipes; the lower parts of the inner side walls of the two outer die cavities are respectively provided with a U-shaped limiting plate fixedly attached to the inner side walls along the circumferential direction, and the openings of the two U-shaped limiting plates are oppositely arranged left and right; a lower positioning plate fixedly attached to the inner side wall of the outer die groove is vertically fixed at the opening part of each U-shaped limiting plate, and the top end surface of the lower positioning plate is higher than the upper surface of the U-shaped limiting plate; the top end face of the lower positioning plate is transversely provided with two lower arc-shaped grooves which are opposite to the inner part and the outer part of the lower parts of the two steel pipe positioning holes and have the same shape;

the inner die device comprises a longitudinally vertical upper positioning plate arranged on the top end surface of the lower positioning plate and two L-shaped inner die plates which are positioned on the upper surface of the U-shaped limiting plate and are oppositely arranged in front and back, and the upper positioning plate is detachably spliced with the two L-shaped inner die plates; the top of the upper positioning plate and the tops of the two L-shaped inner templates extend outwards to be integrally provided with limiting strips lapped on the upper side of the top end surface of the outer mold groove; the bottom end surface of the upper positioning plate is transversely provided with two upper arc-shaped grooves which are opposite to the two lower arc-shaped grooves in a penetrating way, and the shapes of the upper arc-shaped grooves are matched with the shapes of the upper parts of the steel pipes; the bottom parts of the inner surfaces of the two L-shaped inner templates are respectively provided with an L-shaped groove positioning strip with the upper parts fixedly attached to the inner surfaces along the circumferential direction, the cross section shape of the groove positioning strip along the direction vertical to the L-shaped inner templates is matched with the shape of the groove of the sleeper block, and the lower parts of the groove positioning strips are attached to the top parts of the inner surfaces of the U-shaped limiting plates;

the connecting mechanism comprises inverted T-shaped rotating rods which are arranged in the operating gap in a one-to-one correspondence mode, the horizontal section of each inverted T-shaped rotating rod comprises a middle section positioned in the middle and end sections which are integrally arranged on the left side and the right side of the middle section, the diameter of each end section is smaller than that of the middle section, and the distance between the axis of each end section and the outer die cavity is larger than that between the axis of the middle section and the outer die cavity; the outer part of the end section is fixedly sleeved with a first limiting block, a second limiting block and a third limiting block which are arranged at intervals from left to right; ear plates which are movably sleeved outside the end section and fixed on the upper part of the outer side wall of the outer mold groove are respectively arranged between the first limiting block and the second limiting block and between the second limiting block and the third limiting block; a vertical clamping strip is arranged between the two ear plates sleeved on the same end section, the top end part of the vertical clamping strip is fixed on the limiting strip and clamped between the outer die groove and the end section, and a C-shaped clamping groove which is fixed on the limiting strip and has an opening facing the rectangular groove is arranged between the two vertical clamping strips positioned in the same operation gap; the vertical section of the inverted T-shaped rotating rod is clamped in the inner cavity of the C-shaped clamping groove.

The utility model realizes the one-time forming of the groove of the concrete filled steel tube sleeper through the combined structure design of the internal mold device and the external mold device; due to the structural design of the connecting mechanism, on one hand, the automatic assembly of the inner die device and the outer die device is facilitated, and the operation convenience in the assembly process is improved; on the other hand, a certain driving force can be provided in the demolding process, so that the steel pipe concrete sleeper and the internal mold device can be conveniently separated from the inner cavity of the external mold groove; the combined structure design of the steel pipe positioning hole, the upper arc-shaped groove and the lower arc-shaped groove facilitates the positioning and installation of the sleeper framework, and improves the processing precision.

The utility model discloses a use method includes following step:

s1: and (3) mounting the outer die device and the rectangular groove: firstly, transversely placing a rectangular groove, and then respectively placing two outer die devices at the left part and the right part of an inner cavity of the rectangular groove; when the outer mold devices are placed, a distance is reserved between the two outer mold devices; operating gaps are reserved between the front outer side wall of the outer mold groove and the front inner side wall of the rectangular groove and between the rear outer side wall of the outer mold groove and the rear inner side wall of the rectangular groove, the inverted T-shaped rotating rods are placed in the operating gaps in a one-to-one correspondence mode, and the top end portions of the vertical sections of the inverted T-shaped rotating rods are in contact with the inner side walls of the rectangular groove; the steel pipe positioning holes of the two outer die cavities are right-left opposite, and each steel pipe positioning hole is positioned on one side close to the center of the rectangular groove; then the outer bottom walls of the two outer mold grooves are fixed to the inner bottom wall of the rectangular groove, and the left outer side wall of the outer mold groove positioned on the left side and the right outer side wall of the outer mold groove positioned on the right side are respectively fixed to the left inner side wall and the right inner side wall of the rectangular groove;

s2: installing a sleeper framework and an embedded sleeve: firstly, placing a sleeper framework pre-assembled by steel pipes and steel bars into an inner cavity of a rectangular groove, and positioning the sleeper framework through steel pipe positioning holes when placing the sleeper framework; then installing embedded sleeves on the sleeve positioning rods in a one-to-one corresponding manner;

s3: assembling the outer die device and the inner die device: the inner mold device and the outer mold device are detachably assembled through a connecting mechanism; the assembling process is realized by adopting the following steps: firstly, placing an upper positioning plate on the top end surface of a lower positioning plate, enabling two lower arc-shaped grooves to be opposite to two upper arc-shaped grooves up and down, and enabling a limiting strip of the upper positioning plate to be lapped on the top end surface of an outer die groove; then placing the two L-shaped inner templates on the upper surface of the U-shaped limiting plate, enabling the lower parts of the groove positioning strips to be attached to the top of the inner surface of the U-shaped limiting plate, and enabling the limiting strips of the L-shaped inner templates to be lapped on the top end surface of the outer die cavity; in the process, the two vertical clamping strips positioned on the front side synchronously move downwards, and when the two vertical clamping strips move to a gap formed by enclosing the outer die groove, the end section and the lug plate, the end section positioned on the front side is pushed to move forwards and downwards, so that the inverted T-shaped rotating rod positioned on the front side is driven to rotate anticlockwise until the vertical section of the inverted T-shaped rotating rod is clamped in the inner cavity of the C-shaped clamping groove positioned on the front side; the two vertical clamping strips positioned on the rear side synchronously move downwards, and when the two vertical clamping strips move to a gap enclosed by the outer die groove, the end section and the ear plate, the end section positioned on the rear side is pushed to move backwards and downwards, so that the inverted T-shaped rotating rod positioned on the rear side is driven to rotate clockwise until the vertical section of the inverted T-shaped rotating rod is clamped in the inner cavity of the C-shaped clamping groove positioned on the rear side, and therefore the assembly of the first outer die device and the first inner die device is completed; and so on, the assembly of the second external mold device and the second internal mold device can be completed;

s4: pouring the sleeper blocks: firstly, respectively brushing a release agent on the inner surface of an inner die device and the inner surface of an outer die device; then pouring concrete to build a sleeper block; then vibrating and maintaining;

s5: demoulding of the steel pipe concrete sleeper: the rectangular groove is reversed and placed on a vibration table to vibrate, and under the dual actions of vibration of the vibration table and gravity of the concrete filled steel tube sleeper and the internal mold device, the vertical section of the reversed T-shaped rotating rod is separated from the inner cavity of the C-shaped clamping groove and rotates; in the process, the inverted T-shaped rotating rod positioned on the front side rotates to drive the end section positioned on the front side to move backwards and push the vertical clamping strip positioned on the front side to synchronously move downwards until the vertical clamping strip is separated from a gap formed by the outer die cavity, the end section and the lug plate; the inverted T-shaped rotating rod positioned on the rear side rotates to drive the end section positioned on the rear side to move forwards and push the vertical clamping strip positioned on the rear side to synchronously move downwards until the vertical clamping strip is separated from a gap formed by the enclosing of the outer die groove, the end section and the lug plate; then lifting the rectangular groove upwards to separate the concrete filled steel tube sleeper from the inner die device in the inner cavity of the outer die groove, thereby realizing the purpose of demoulding the concrete filled steel tube sleeper;

s6: removing the inner die device: and removing the upper positioning plate and the L-shaped inner template from the concrete filled steel tube sleeper, thereby realizing the separation of the concrete filled steel tube sleeper and the inner template device.

The upper part of the steel pipe positioning hole is square, and the width of the square is matched with the outer diameter of the steel pipe.

This structural design makes things convenient for sleeper skeleton top-down's installation, has further increased the utility model discloses a structural reliability.

The front part and the rear part of the lower positioning plate, the front part and the rear part of the upper positioning plate, the corner part of the U-shaped limiting plate and the corner part of the L-shaped inner template are all in a fillet structure matched with the corner part of the sleeper block in shape.

The structural design further improves the processing precision of the concrete filled steel tube sleeper produced by the manufacturing method.

The limiting strips positioned at the splicing parts of the upper positioning plate and the L-shaped inner template are composed of upper splicing strips and lower splicing strips which are vertically lapped, and the upper splicing strips and the lower splicing strips are transversely arranged; the upper splicing strip and the L-shaped inner template are of an integrated structure, and the lower splicing strip and the upper positioning plate are of an integrated structure.

The structure design is convenient for reliable splicing of the upper positioning plate and the L-shaped inner template; secondly, the convenience in assembling and disassembling operation is improved, and the working efficiency of the assembling operation is further improved; thirdly, through last concatenation strip support concatenation strip down, can prevent that the top board from taking place to remove at the concrete placement in-process, further increased the structural reliability of centre form device.

The vertical section of the inverted T-shaped rotating rod is integrally arranged on the solid column at the top end of the solid column and is connected with the C-shaped clamping groove in a clamping mode.

The handle is a cylindrical handle.

The utility model has reasonable and reliable structural design, realizes the purpose of one-time forming of the groove of the concrete filled steel tube sleeper, has convenient operation and convenient assembly, and the internal mold device and the external mold device can be automatically separated, thereby improving the production efficiency of the concrete filled steel tube sleeper; and meanwhile, the processing precision is high, the production quality of the concrete filled steel tube sleeper produced by using the die is improved, and the die has the advantages of simplicity, practicability and easiness in popularization, and can be used as a shaping tool for prefabricating the concrete filled steel tube sleeper with a groove on the side surface.

Drawings

Fig. 1 is a reference diagram of the assembled state of the rectangular groove, the external mold device and the internal mold device in the present invention;

FIG. 2 is a schematic structural view of a concrete filled steel tube sleeper according to the present invention;

FIG. 3 is a schematic top view of a concrete filled steel tube sleeper according to the present invention;

FIG. 4 is a schematic side view of a concrete filled steel tube sleeper according to the present invention;

FIG. 5 is a schematic structural view of a groove of a concrete filled steel tube sleeper according to the present invention;

fig. 6 is a reference diagram of the assembled state of the middle and outer mold devices and the inner mold device according to the present invention;

FIG. 7 is a side schematic view of FIG. 6;

FIG. 8 is a schematic structural view of the middle and outer mold device of the present invention;

FIG. 9 is a schematic top view of FIG. 8;

fig. 10 is a schematic structural view of the inner mold device of the present invention;

FIG. 11 is a schematic right view of FIG. 10;

fig. 12 is a schematic structural view of the upper positioning plate of the present invention;

FIG. 13 is a schematic left side view of FIG. 12;

FIG. 14 is a schematic structural view of the L-shaped inner form of the present invention;

FIG. 15 is a schematic right side view of FIG. 14;

fig. 16 is a schematic structural view of the inverted T-shaped rotating rod of the present invention;

fig. 17 is a schematic structural view of the middle end section of the present invention;

fig. 18 is a schematic structural view of the vertical section of the inverted T-shaped rotating rod of the present invention.

In the figure, 101-a rectangular groove, 102-a handle, 103-an operating gap, 201-an outer die groove, 202-a sleeve positioning rod, 203-a steel pipe positioning hole, 204-a U-shaped limiting plate, 205-a lower positioning plate, 206-a lower arc-shaped groove, 301-an upper positioning plate, 302-an L-shaped inner die plate, 303-a limiting strip, 304-an upper arc-shaped groove, 305-a groove positioning strip, 306-an upper splicing strip, 307-a lower splicing strip, 401-a middle section, 402-an end section, 403-a first limiting block, 404-a second limiting block, 405-a third limiting block, 406-an ear plate, 407-a vertical clamping strip, 408-a C-shaped clamping groove, 409-a vertical section of an inverted T-shaped rotating rod, 410-a solid column, 501-a steel rail, 502-a steel pipe, 503-a rail pillow block, 504-groove, 505-pre-embedded casing.

Detailed Description

A separable mould for prefabricating a concrete-filled steel tube sleeper comprises a rectangular groove 101 with an upward notch and transversely arranged, wherein handles 102 are fixed on the left outer side wall and the right outer side wall of the rectangular groove 101; the inner cavity of the rectangular groove 101 is provided with two outer die devices which are distributed left and right, a distance is reserved between the two outer die devices, the upper part of each outer die device is provided with an inner die device, and the inner die device and the outer die devices are detachably connected through a connecting mechanism;

the outer die device comprises an outer die groove 201 with an upward notch and an outer bottom wall fixed on the inner bottom wall of the rectangular groove 101, and operation gaps 103 are reserved between the front outer side wall of the outer die groove 201 and the front inner side wall of the rectangular groove 101 and between the rear outer side wall of the outer die groove 201 and the rear inner side wall of the rectangular groove 101; the left outer side wall of the outer mold cavity 201 on the left side and the right outer side wall of the outer mold cavity 201 on the right side are respectively fixed to the left inner side wall and the right inner side wall of the rectangular groove 101; two sleeve positioning rods 202 distributed left and right are vertically fixed on the inner bottom walls of the two outer die grooves 201, two steel pipe positioning holes 203 distributed front and back are formed in the opposite side walls in a penetrating manner, and the steel pipe positioning holes 203 are communicated with the notches of the outer die grooves 201; the steel pipe positioning holes 203 of the two outer die cavities 201 are right-left opposite, and the lower part of each steel pipe positioning hole 203 is in an arc shape matched with the shape of the lower part of the steel pipe 502; the lower parts of the inner side walls of the two outer die cavities 201 are circumferentially provided with U-shaped limiting plates 204 fixedly attached to the inner side walls, and the openings of the two U-shaped limiting plates 204 are arranged in a left-right opposite mode; a lower positioning plate 205 fixedly attached to the inner side wall of the outer mold groove 201 is vertically fixed at the opening part of each U-shaped limiting plate 204, and the top end surface of the lower positioning plate 205 is higher than the upper surface of the U-shaped limiting plate 204; the top end surface of the lower positioning plate 205 is transversely provided with two lower arc-shaped grooves 206 which are opposite to the lower parts of the two steel pipe positioning holes 203 inside and outside and have the same shape in a penetrating way;

the inner die device comprises a longitudinally vertical upper positioning plate 301 arranged on the top end surface of the lower positioning plate 205 and two L-shaped inner die plates 302 which are positioned on the upper surfaces of the U-shaped limiting plates 204 and are arranged oppositely front and back, and the upper positioning plate 301 and the two L-shaped inner die plates 302 are detachably spliced; the top of the upper positioning plate 301 and the tops of the two L-shaped inner templates 302 extend outwards to form a whole, and limit strips 303 lapped on the upper side of the top end face of the outer mold cavity 201 are arranged; the bottom end surface of the upper positioning plate 301 is transversely provided with two upper arc-shaped grooves 304 which are vertically opposite to the two lower arc-shaped grooves 206 in a through manner, and the shapes of the upper arc-shaped grooves 304 are matched with the shapes of the upper parts of the steel pipes 502; the bottom parts of the inner surfaces of the two L-shaped inner templates 302 are respectively provided with an L-shaped groove positioning strip 305, the upper parts of the L-shaped groove positioning strips are fixedly attached to the L-shaped inner templates along the circumferential direction, the cross section of each groove positioning strip 305 in the direction vertical to the L-shaped inner templates 302 is matched with the shape of a groove 504 of the sleeper block 503, and the lower parts of the groove positioning strips 305 are attached to the top parts of the inner surfaces of the U-shaped limiting plates 204;

the connecting mechanism comprises inverted T-shaped rotating rods which are arranged in the operation gap 103 in a one-to-one correspondence mode, the horizontal section of each inverted T-shaped rotating rod comprises a middle section 401 located in the middle and end sections 402 which are integrally arranged on the left side and the right side of the middle section 401, the diameter of each end section 402 is smaller than that of the middle section 401, and the distance between the axis of each end section 402 and the outer mold groove 201 is larger than that between the axis of each middle section 401 and the outer mold groove 201; a first limiting block 403, a second limiting block 404 and a third limiting block 405 which are arranged at intervals are fixedly sleeved outside the end section 402 from left to right in sequence; ear plates 406 which are movably sleeved outside the end section 402 and fixed to the upper part of the outer side wall of the outer mold groove 201 are respectively arranged between the first limiting block 403 and the second limiting block 404 and between the second limiting block 404 and the third limiting block 405; a vertical clamping strip 407 is arranged between the two ear plates 406 sleeved on the same end section 402, the top end part of the vertical clamping strip 407 is fixed on the limiting strip 303 and clamped between the outer die cavity 201 and the end section 402, and a C-shaped clamping groove 408 which is fixed on the limiting strip 303 and has an opening facing the rectangular groove 101 is arranged between the two vertical clamping strips 407 in the same operating gap 103; the vertical section 409 of the inverted T-shaped rotating rod is clamped in the inner cavity of the C-shaped clamping groove 408.

The upper part of the steel pipe positioning hole 203 is square, and the width of the square is matched with the outer diameter of the steel pipe 502. The front part and the rear part of the lower positioning plate 205, the front part and the rear part of the upper positioning plate 301, the corner part of the U-shaped limiting plate 204 and the corner part of the L-shaped inner template 302 are all in round angle structures matched with the corner part of the sleeper block 503 in shape. The limiting strip 303 positioned at the joint part of the upper positioning plate 301 and the L-shaped inner template 302 consists of an upper splicing strip 306 and a lower splicing strip 307 which are overlapped up and down, and the upper splicing strip 306 and the lower splicing strip 307 are transversely arranged; the upper splicing strip 306 and the L-shaped inner template 302 are integrated, and the lower splicing strip 307 and the upper positioning plate 301 are integrated. The vertical section 409 of the inverted T-shaped rotating rod is clamped with the C-shaped clamping groove 408 through a solid column 410 integrally arranged at the top end part of the inverted T-shaped rotating rod. The handle 102 is a cylindrical handle.

Claims (6)

1. The utility model provides a detachable mould that precast of steel pipe concrete sleeper used which characterized in that: the handle structure comprises a rectangular groove (101) with an upward notch and a transverse position, wherein handles (102) are fixed on the left outer side wall and the right outer side wall of the rectangular groove (101); the inner cavity of the rectangular groove (101) is provided with two outer die devices which are distributed left and right, a distance is reserved between the two outer die devices, the upper part of each outer die device is provided with an inner die device, and the inner die device and the outer die devices are detachably connected through a connecting mechanism;

the outer die device comprises an outer die groove (201) with an upward notch and an outer bottom wall fixed on the inner bottom wall of the rectangular groove (101), and operating gaps (103) are reserved between the front outer side wall of the outer die groove (201) and the front inner side wall of the rectangular groove (101) and between the rear outer side wall and the rear inner side wall of the rectangular groove (101); the left outer side wall of the outer die groove (201) positioned on the left side and the right outer side wall of the outer die groove (201) positioned on the right side are respectively fixed on the left inner side wall and the right inner side wall of the rectangular groove (101); two sleeve positioning rods (202) distributed left and right are vertically fixed on the inner bottom walls of the two outer die grooves (201), two steel pipe positioning holes (203) distributed front and back are formed in the opposite side walls in a penetrating manner, and the steel pipe positioning holes (203) are communicated with the notches of the outer die grooves (201); the steel pipe positioning holes (203) of the two outer die cavities (201) are right-left opposite, and the lower parts of the steel pipe positioning holes (203) are arc-shaped matched with the shape of the lower part of the steel pipe (502); u-shaped limiting plates (204) fixedly attached to the lower portions of the inner side walls of the two outer die cavities (201) are arranged along the circumferential direction, and openings of the two U-shaped limiting plates (204) are arranged in a left-right opposite mode; a lower positioning plate (205) fixedly attached to the inner side wall of the outer die cavity (201) is vertically fixed at the opening part of each U-shaped limiting plate (204), and the top end surface of the lower positioning plate (205) is higher than the upper surface of the U-shaped limiting plate (204); the top end surface of the lower positioning plate (205) is transversely provided with two lower arc-shaped grooves (206) which are opposite to the inner part and the outer part of the lower parts of the two steel pipe positioning holes (203) and have the same shape in a penetrating way;

the inner die device comprises a longitudinally vertical upper positioning plate (301) arranged on the top end surface of the lower positioning plate (205) and two L-shaped inner die plates (302) which are positioned on the upper surface of the U-shaped limiting plate (204) and are arranged in a front-back opposite mode, and the upper positioning plate (301) is detachably spliced with the two L-shaped inner die plates (302); the top of the upper positioning plate (301) and the tops of the two L-shaped inner templates (302) extend outwards to form a whole, and limit strips (303) lapped on the upper side of the top end face of the outer die cavity (201) are arranged; the bottom end surface of the upper positioning plate (301) is transversely provided with two upper arc-shaped grooves (304) which are opposite to the two lower arc-shaped grooves (206) in a penetrating way, and the shapes of the upper arc-shaped grooves (304) are matched with the shapes of the upper parts of the steel pipes (502); the bottom parts of the inner surfaces of the two L-shaped inner templates (302) are respectively provided with an L-shaped groove positioning strip (305) with the upper parts fixedly attached to the two L-shaped inner templates along the circumferential direction, the cross section of each groove positioning strip (305) along the direction vertical to the L-shaped inner templates (302) is matched with the shape of a groove (504) of the sleeper block (503), and the lower parts of the groove positioning strips (305) are attached to the top parts of the inner surfaces of the U-shaped limiting plates (204);

the connecting mechanism comprises inverted T-shaped rotating rods which are arranged in the operation gap (103) in a one-to-one correspondence mode, the horizontal section of each inverted T-shaped rotating rod comprises a middle section (401) located in the middle and end sections (402) which are integrally arranged on the left side and the right side of the middle section (401), the diameter of each end section (402) is smaller than that of the middle section (401), and the distance between the axis of each end section (402) and the outer die cavity (201) is larger than that between the axis of each middle section (401) and the outer die cavity (201); a first limiting block (403), a second limiting block (404) and a third limiting block (405) which are arranged at intervals are fixedly sleeved outside the end section (402) from left to right in sequence; ear plates (406) which are movably sleeved outside the end section (402) and fixed to the upper part of the outer side wall of the outer die cavity (201) are respectively arranged between the first limiting block (403) and the second limiting block (404) and between the second limiting block (404) and the third limiting block (405); a vertical clamping strip (407) is arranged between the two ear plates (406) sleeved on the same end section (402), the top end part of the vertical clamping strip (407) is fixed on the limiting strip (303) and clamped between the outer die cavity (201) and the end section (402), and a C-shaped clamping groove (408) which is fixed on the limiting strip (303) and has an opening facing the rectangular groove (101) is arranged between the two vertical clamping strips (407) positioned in the same operation gap (103); the vertical section (409) of the inverted T-shaped rotating rod is clamped in the inner cavity of the C-shaped clamping groove (408).

2. The separable mold for prefabricating the concrete-filled steel tube sleeper as claimed in claim 1, wherein: the upper part of the steel pipe positioning hole (203) is square, and the width of the square is matched with the outer diameter of the steel pipe (502).

3. The separable mold for prefabricating the concrete-filled steel tube sleeper as claimed in claim 1, wherein: the front part and the rear part of the lower positioning plate (205), the front part and the rear part of the upper positioning plate (301), the corner part of the U-shaped limiting plate (204) and the corner part of the L-shaped inner template (302) are all in a round corner structure matched with the corner part of the sleeper block (503) in shape.

4. The separable mold for prefabricating the concrete-filled steel tube sleeper as claimed in claim 1, wherein: the limiting strips (303) positioned at the splicing parts of the upper positioning plate (301) and the L-shaped inner template (302) are composed of upper splicing strips (306) and lower splicing strips (307) which are overlapped up and down, and the upper splicing strips (306) and the lower splicing strips (307) are transversely arranged; the upper splicing strip (306) and the L-shaped inner template (302) are in an integral structure, and the lower splicing strip (307) and the upper positioning plate (301) are in an integral structure.

5. The separable mold for prefabricating the concrete-filled steel tube sleeper as claimed in claim 1, wherein: the vertical section (409) of the inverted T-shaped rotating rod is clamped with the C-shaped clamping groove (408) through a solid column (410) integrally arranged at the top end of the inverted T-shaped rotating rod.

6. The separable mold for prefabricating the concrete-filled steel tube sleeper as claimed in claim 1, wherein: the handle (102) is a cylindrical handle.

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