Prestressed track plate mold device

Abstract

The invention provides a prestressed track plate mold device, and relates to the technical field of track plate production. The device comprises a forming die and a tensioning assembly, a die cavity is formed in the top of the forming die, and a tensioning hole and a fixing hole are oppositely formed in the die cavity; the tensioning assembly comprises a fixing rod, a tensioning rod and a tensioning unit, one end of the fixing rod penetrates through the fixing hole to be detachably connected with the rebar bundle, a fixing protrusion is formed at the other end of the fixing rod and abuts against an opening of the fixing hole, and the tensioning rod penetrates through the tensioning hole to be detachably connected with the rebar bundle; the tensioning unit comprises a sliding rail, a moving frame, a clamping piece and a driving cylinder, the sliding rail is arranged in the length direction of the tensioning hole, the moving frame is arranged on the sliding rail, the clamping piece is arranged on the moving frame and detachably connected with the end, away from the mold cavity, of the tensioning rod, and the driving cylinder can drive the moving frame to be close to the fixed protrusion along the sliding rail; or the steel bar bundle is far away from the fixed bulge and is tensioned between the tensioning rod and the fixed rod. By means of the device, efficient tensioning and releasing of the steel bar bundle can be achieved.

Description

Technical Field

[0001] This application relates to the field of track slab production technology, and in particular to a prestressed track slab mold device. Background Technology

[0002] In the production of existing track slabs, a fixed platform is mainly used to apply prestress to the steel reinforcement bundles inside the track slab. This device uses a tensioning beam to simultaneously drive multiple steel bars to tension as a whole. After the tension reaches the set value, the tension is locked manually using a torque wrench. Finally, after the concrete has solidified, the tension is unlocked manually.

[0003] However, manual locking and unlocking operations not only increase working time and the number of workers, but also make it difficult to ensure consistent locking of each steel bar due to variations in manual force, further exacerbating fluctuations in tensioning accuracy. Furthermore, manual locking is inefficient and falls short of the requirements of modern assembly lines for continuous, rapid, and standardized operations, thus limiting the overall efficiency improvement of track slab production.

[0004] Therefore, there is a need to provide a prestressed track slab mold device. Summary of the Invention

[0005] To address the problem that existing track slab production requires manual locking and unlocking during steel bar tensioning, which is time-consuming and labor-intensive, this application provides a prestressed track slab mold device.

[0006] This application provides a prestressed track slab mold device, which adopts the following technical solution: it includes a forming mold and a tensioning assembly. The top of the forming mold is formed with a mold cavity suitable for accommodating steel bar bundles. Tensioning holes and fixing holes leading to the outside are opened opposite each other on the side wall of the mold cavity. The tensioning assembly includes a fixed rod, a tensioning rod, and a tensioning unit. One end of the fixed rod passes through the fixed hole and extends into the mold cavity, where it is detachably connected to the reinforcing bar bundle. A fixed protrusion is formed on the other end of the fixed rod, and the fixed protrusion abuts against the opening of the fixed hole on the side away from the mold cavity. One end of the tensioning rod passes through the tensioning hole and extends into the mold cavity, where it is detachably connected to the reinforcing bar bundle. The tensioning unit includes a slide rail, a movable frame, a snap-fit ​​component, and a drive cylinder. The slide rail is arranged along the length of the tensioning hole. The movable frame is mounted on the slide rail. The snap-fit ​​component is mounted on the movable frame and detachably connected to the end of the tensioning rod away from the mold cavity. The drive cylinder is kinetically connected to the movable frame and can drive the movable frame along the slide rail to approach or move away from the fixed protrusion, thus tensioning the reinforcing bar bundle between the tensioning rod and the fixed rod.

[0007] By adopting the above technical solution, the mold cavity of the forming mold can accommodate the steel bar bundle. The fixing rod and tensioning rod pass through the fixing hole and tensioning hole respectively and are detachably connected to the steel bar bundle. The tensioning unit can drive the moving frame to move along the slide rail to achieve tensioning of the steel bar bundle. Compared with the existing technology that uses a fixed platform and requires manual use of a torque wrench to lock and unlock the tension force, this device can avoid manual operation, reduce working time and the number of workers required, eliminate the problem of inconsistent locking effect caused by differences in manual operation force, reduce the fluctuation of tension accuracy, improve tension accuracy, and at the same time meet the requirements of modern assembly lines for continuous, fast and standardized operation, thereby improving the overall efficiency of track slab production.

[0008] Specifically, the tensioning assembly further includes an unlocking unit, which includes a fixed sleeve, a tensioning sleeve, and a rotating component. The reinforcing bar bundle is provided with multiple screw ends. One end of the tensioning rod and the end of the fixed rod away from the fixed protrusion are both provided with screw holes adapted to the screw ends. The other end of the tensioning rod is provided with a tensioning block and a locking groove. The end of the fixed rod near the fixed protrusion can be inserted into the fixed sleeve. The inner wall of the fixed sleeve can abut against the fixed rod and restrict the fixed rod from rotating within the fixed sleeve. The tensioning sleeve is mounted on the movable frame. The locking component is located on the inner wall of the tensioning sleeve. The rotating component is pulsatorically connected to both the fixed sleeve and the tensioning sleeve and can drive the fixed sleeve and the tensioning sleeve to rotate. When the moving frame approaches the mold cavity, the tensioning block can be inserted into the tensioning sleeve. After the tensioning sleeve rotates along the tightening direction of the screw hole of the tensioning rod, it is sleeved on the snap-fit ​​member via the snap-fit ​​groove and rotates with the tensioning sleeve. Then, when the moving frame moves away from the mold cavity, the side of the snap-fit ​​member facing away from the opening of the tensioning sleeve abuts against the groove wall of the snap-fit ​​groove and restricts the tensioning sleeve from leaving the tensioning rod. Alternatively, after the tensioning sleeve rotates along the loosening direction of the screw hole of the tensioning rod, it abuts against the snap-fit ​​member via the tensioning block and rotates with the tensioning sleeve. Then, when the moving frame moves away from the mold cavity, the tensioning sleeve can leave the tensioning rod.

[0009] By adopting the above technical solution, during tensioning, the tensioning sleeve rotates along the tightening direction of the screw hole of the tensioning rod and engages with the snap-fit ​​protrusion through the snap-fit ​​groove, ensuring that the tensioning sleeve does not leave the tensioning rod when the moving frame moves away from the mold cavity, thus achieving effective tensioning of the steel bar bundle; during unlocking, the tensioning sleeve rotates along the loosening direction of the screw hole of the tensioning rod, allowing the tensioning sleeve to leave the tensioning rod when the moving frame moves away from the mold cavity, achieving automatic unlocking, avoiding manual locking and unlocking operations, reducing working time and the number of workers, ensuring consistent locking effect for each steel bar, reducing fluctuations in tensioning accuracy, and improving the overall efficiency of track slab production.

[0010] Specifically, the molding mold includes a bottom mold and a molding enclosure. The bottom mold is abutted within the molding enclosure, forming the mold cavity between the top of the bottom mold and the inner wall of the molding enclosure. The molding enclosure includes two end molds and two side molds. The two end molds and the two side molds are arranged opposite each other with the bottom mold as the center. Each end mold has a fixing hole at both ends, and each side mold has a connecting hole at both ends. Both end molds can be connected to the adjacent side molds by bolts passing sequentially through the fixing holes and the adjacent connecting holes and screwed with nuts, and are assembled with the two side molds to form the molding enclosure.

[0011] By adopting the above technical solution, the forming mold is designed as a structure of a bottom mold and a forming enclosure. The forming enclosure consists of two end molds and two side molds. The end molds and side molds are connected and assembled into the forming enclosure using bolts and nuts, which facilitates the assembly and disassembly of the forming mold and improves the installation and maintenance efficiency of the mold. At the same time, this structure can form a mold cavity between the top of the bottom mold and the inner wall of the forming enclosure, providing space for the steel reinforcement bundles and concrete, which is beneficial to the forming and manufacturing of track slabs.

[0012] Furthermore, a limiting block is provided at the bottom of the bottom mold, and a limiting hole is opened on the forming enclosure along the length direction of the tensioning rod. The tensioning hole and the limiting hole are arranged vertically opposite each other with the bottom mold as the center. The limiting block is inserted into the limiting hole. When the moving frame moves away from the mold cavity and tensions the steel bar bundle, the limiting block can abut against the bottom wall of the limiting hole and restrict the part of the forming enclosure that is higher than the bottom mold from flipping around the abutment point between the forming enclosure and the bottom mold into the mold cavity.

[0013] By adopting the above technical solution, when the moving frame moves away from the mold cavity and tensions the steel reinforcement bundle, the limiting block at the bottom of the bottom mold is inserted into the limiting hole of the forming enclosure. The limiting block can abut against the bottom wall of the limiting hole, which can effectively restrict the part of the forming enclosure that is higher than the bottom mold from flipping around the abutment between the forming enclosure and the bottom mold into the mold cavity. This ensures the stability of the mold structure, avoids the forming enclosure from flipping and deforming during the tensioning of the steel reinforcement bundle, and thus ensures the forming quality of the prestressed track slab.

[0014] Furthermore, a sealing groove is provided circumferentially on the inner wall of the molded enclosure, and a sealing strip is provided in the sealing groove. When the molded enclosure is assembled with the bottom mold, the sealing strip abuts against the side wall of the bottom mold.

[0015] By adopting the above technical solution, when the forming enclosure and the bottom mold are assembled, the sealing rubber in the sealing groove abuts against the side wall of the bottom mold, which can prevent materials such as concrete from leaking from the joint between the forming enclosure and the bottom mold, improve the sealing performance of the mold, and ensure the forming quality of the track slab.

[0016] Furthermore, it also includes an arching assembly, which is drively connected to the two end molds and can drive the two end molds to move closer to each other, so that the middle part of the bottom mold arches upward and forms an arc-shaped surface on the top of the bottom mold.

[0017] By adopting the above technical solution, the arching component is connected to the two end molds through a transmission, driving the two end molds to move closer to each other, causing the middle of the bottom mold to arch upward and form an arc-shaped surface at the top. This can meet the needs of track slab production for different arc-shaped surfaces and improve the applicability and quality of the track slab.

[0018] Furthermore, the arching assembly includes an arching screw, abutment nuts, and a driving component. Each end mold has an arching hole. One end of the arching screw passes through one of the two arching holes and is screwed to the abutment nut. The other end of the arching screw passes through the other of the two arching holes and is connected to the driving component. The driving component can drive the arching screw to move the abutment nut closer to the one of the two end molds that is away from the abutment nut.

[0019] By adopting the above technical solution, the driving component drives the arching screw to rotate, causing the abutting nut to move along the arching screw and approach the end mold away from it, thereby driving the two end molds to approach each other, realizing that the middle of the bottom mold arches upward and forms an arc surface at the top, which meets the special requirements of the bottom mold shape for track plate production and improves the production quality of track plates.

[0020] Furthermore, the arching assembly also includes a liquid-filled bladder, a limiting box, a fixing plate, and a clamping plate. The opening of the limiting box is connected to the bottom of the bottom mold, forming an expansion cavity between them. A clamping hole leading to the outside is provided on the inner bottom wall of the expansion cavity. The top of the fixing plate is connected to one side opening of the clamping hole. A clearance hole is provided on the surface of the fixing plate. A connecting screw hole is provided on the clamping plate. The arching screw passes through the clearance hole and is screwed into the connecting screw hole. The liquid-filled bladder includes a clamping part and a lifting part. The clamping part extends downward between the clamping plate and the fixing plate. The lifting part is located in the expansion cavity and abuts against the inner wall of the expansion cavity. When the arching screw drives the abutting nut to approach one of the two end molds away from the abutting nut, the arching screw can drive the clamping plate to approach the fixing plate and compress the clamping part, thereby causing the lifting part to push the middle of the bottom mold upward and form an arc-shaped surface on the top of the bottom mold.

[0021] By adopting the above technical solution, the liquid-filled bladder is designed so that the middle part of the bottom mold will be subjected to an upward resisting force from the lifting part at the moment of arching. This ensures that when the bottom mold is sandwiched between the two end molds, only the middle part arches upward, forming a large arched arc surface on the inner bottom wall of the mold cavity. This avoids the middle part of the bottom mold sinking downward or multiple parts bulging or sinking, improves the success rate of the arching component in making the bottom mold arch, makes the deformation of the bottom mold more controllable, and ensures that the molding mold can produce molded parts with different arc bottoms.

[0022] Furthermore, the clamping part is provided with an injection port leading to the interior of the liquid-containing bladder, and a sealing cap is detachably connected to the injection port.

[0023] By adopting the above technical solution, the injection port can be used to inject liquid into the liquid-filled bladder to adjust the amount of liquid in the bladder and meet the requirements of the arching height of the bottom mold under different working conditions. The detachable sealing cap can seal the injection port after the liquid is injected to prevent the liquid in the bladder from leaking and ensure the normal operation of the arching component.

[0024] Specifically, it also includes an ejection assembly, which includes an ejector rod and an ejection cylinder. An ejection hole leading to the outside is provided on the inner bottom wall of the mold cavity in a vertical direction. The ejector rod is inserted into the ejection hole. The ejection cylinder is connected to the ejector rod and can drive the ejector rod away from or into the mold cavity along the ejection hole.

[0025] By adopting the above technical solution, the automatic ejection of the track slab can be achieved, which improves the efficiency of track slab demolding, reduces manual operation, lowers labor costs, and ensures a stable and precise ejection process, thus helping to guarantee the quality of the track slab.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. Automatic tensioning and locking of steel bar bundles is achieved through tensioning components, avoiding manual operation, reducing working time and the number of workers, and lowering production costs; 2. Automated operation ensures consistent locking effect for each steel bar, reduces fluctuations in tensioning accuracy, and improves the quality stability of the track slab; 3. The automatic operation mode is highly efficient, meeting the requirements of modern production lines for continuous, fast, and standardized operations, and improving the overall efficiency of track slab production. Attached Figure Description

[0027] Figure 1 This is a top view of the first embodiment of this application; Figure 2 yes Figure 1 A schematic enlarged view of area A in the middle, showing the locking lever; Figure 3 This is a right view of the first embodiment of this application; Figure 4 This is a perspective view of a second embodiment of this application, wherein the tensioning unit and the unlocking unit are not shown; Figure 5 This is a front view of the second embodiment of this application; Figure 6 It is along Figure 5 A schematic cross-sectional view taken along the BB direction; Figure 7 It is along Figure 6 A schematic cross-sectional view taken along the CC direction, showing only a portion of the molding die; Figure 8 It is along Figure 7 A schematic cross-sectional view taken along the DD direction, showing only a portion of the molding die; Figure 9 It is along Figure 5 A schematic cross-sectional view taken along the EE direction, showing only a portion of the molding die; Figure 10 It is along Figure 5 A schematic cross-sectional view taken along the FF direction, showing only a portion of the molding die.

[0028] Reference numerals: 1. Forming mold; 11. Bottom mold; 111. Limiting block; 12. Forming enclosure; 121. End mold; 1211. Fixing hole; 122. Side mold; 123. Sealing strip; 2. Tensioning assembly; 21. Fixing rod; 211. Fixing protrusion; 22. Tensioning rod; 221. Tensioning block; 222. Snap-fit ​​groove; 23. Tensioning unit; 231. Slide rail; 232. Moving frame; 233. Snap-fit ​​component; 2 34. Drive cylinder; 24. Unlocking unit; 241. Fixing sleeve; 242. Tensioning sleeve; 243. Rotating component; 3. Arching assembly; 31. Arching screw; 32. Abutment nut; 33. Drive component; 34. Liquid-containing bladder; 341. Clamping part; 3411. Sealing cap; 342. Lifting part; 35. Limit box; 36. Fixing plate; 37. Clamping plate; 4. Ejection assembly; 41. Ejection rod; 42. Ejection cylinder. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-10 Further explanation: See Figure 1 , Figure 2 , Figure 3 and Figure 9In a first embodiment, a prestressed track slab mold device includes a forming mold 1, a tensioning assembly 2, at least one arching assembly 3, and four ejection assemblies 4. The forming mold 1 includes a bottom mold 11 and a forming enclosure 12. The bottom mold 11 is abutted within the forming enclosure 12, forming a mold cavity between the top of the bottom mold 11 and the inner wall of the forming enclosure 12. The forming enclosure 12 includes two end molds 121 and two side molds 122, which are arranged opposite each other with the bottom mold 11 as the center. Each end mold 121 has two fixing holes 1211 at both ends. Each side mold 122 has a connecting plate at both ends along the length direction of the end mold 121, and each connecting plate has two connecting holes. The four connecting plates correspond to the two end molds 121 respectively. One end of 1 is such that both end molds 121 can be connected to the adjacent side molds 122 by bolts passing sequentially through the fixing holes 1211 and adjacent connecting holes and screwed with nuts, and assembled with the two side molds 122 to form a forming enclosure 12; the inner side wall of the forming enclosure 12 has two rings of through holes along the circumference. The four side walls of the steel bar bundles (not shown in the figure) that need to be pre-placed into the mold cavity during casting will each have multiple screw ends along the horizontal direction. These screw ends correspond one-to-one with the two rings of through holes opened on the forming enclosure 12. The one of the two end molds 121 and the one of the two side molds 122 in each ring of through holes is formed as a tensioning hole, and the other one of the two end molds 121 and the other one of the two side molds 122 in each ring of through holes is formed as a fixing hole.

[0030] See Figure 1 and Figure 2The tensioning assembly 2 includes multiple fixing rods 21, multiple tensioning rods 22, two tensioning units 23, and multiple unlocking units 24. Each fixing rod 21 corresponds to a fixing hole. One end of each fixing rod 21 passes through a corresponding fixing hole and extends into the mold cavity, with a threaded hole adapted to the screw end, allowing the fixing rod 21 to be screwed into the corresponding screw end. A fixing protrusion 211 is formed on the other end of each fixing rod 21, abutting against the opening of the fixing hole on the side away from the mold cavity. Each tensioning rod 22 corresponds to a tensioning hole. One end of each tensioning rod 22 passes through a corresponding tensioning hole and extends into the mold cavity, with a threaded hole adapted to the screw end, allowing the tensioning rod 22 to be screwed into the corresponding screw end. The other end is provided with a tensioning block 221 and a snap-fit ​​groove 222; the two tensioning units 23 correspond to the tensioning rods 22 on the end mold 121 and the side mold 122 respectively. Each tensioning unit 23 includes two slide rails 231, two moving frames 232, four drive cylinders 234 and multiple snap-fit ​​parts 233. The two slide rails 231 are arranged opposite each other with the forming mold 1 as the center. Each slide rail 231 is arranged along the length direction of the corresponding tensioning rod 22. The slide rails 231 correspond one-to-one with the moving frames 232. Each moving frame 232 is set on a corresponding slide rail 231. Each moving frame 232 corresponds to two drive cylinders 234. The piston rod of each drive cylinder 234 is connected to a corresponding moving frame 232 and can drive the moving frame 232 to move closer to or away from the forming mold 1 along the slide rail 231.

[0031] See Figure 1 and Figure 3 The unlocking unit 24 includes multiple fixed sleeves 241, multiple tensioning sleeves 242, and multiple rotating components 243. Each rotating component 243 can be a rotary motor. Multiple rotary motors are distributed on each movable frame 232. Each fixed sleeve 241 corresponds one-to-one with a fixed rod 21, and each fixed sleeve 241 is positioned opposite the corresponding fixed rod 21 on the output shaft of the rotary motor of the movable frame 232 adjacent to that fixed rod 21. Each tensioning sleeve 242 corresponds one-to-one with a tensioning rod 22, and each tensioning sleeve 242 is positioned opposite the corresponding tensioning rod 22 on the movable frame 232. On the output shaft of the rotary motor of the adjacent movable frame 232 of the tie rod 22, a fixed sleeve 241 or a tensioning sleeve 242 is provided on the output shaft of each rotary motor; the inner wall cross section of the fixed sleeve 241 can be set to be non-circular to match the fixed rod 21, so that the inner wall of the fixed sleeve 241 can abut against the fixed rod 21 and restrict the fixed rod 21 from rotating inside the fixed sleeve 241; the snap-fit ​​233 corresponds one-to-one with the tensioning sleeve 242, and each snap-fit ​​233 is provided at the opening of the corresponding tensioning sleeve 242.

[0032] The tensioning principle of the first embodiment described in this application is as follows: When producing prestressed track slabs, the user can first assemble the forming mold 1, then place the steel reinforcement bundle into the mold cavity of the forming mold 1, and then control each drive cylinder 234 to drive each moving frame 232 to approach the forming mold 1. After each fixed sleeve 241 is fitted onto the corresponding fixed rod 21 and each tensioning sleeve 242 is fitted onto the corresponding tensioning rod 22, each rotary motor is started to drive each fixed sleeve 241 and each tensioning sleeve 242 to rotate in the tightening direction of their own screw holes. At this time, the tensioning block 221 will be inserted into the tensioning sleeve 242 and fitted onto the clamp through the locking groove 222. On the connector 233, the tension rod 22 can rotate with the tension sleeve 242, and the fixing rod 21 will also rotate with the fixing sleeve 241. Then, each fixing rod 21 and tension rod 22 can be screwed to a corresponding steel bar bundle. Then, the corresponding drive cylinder 234 is controlled to drive the two moving frames 232 with tension sleeve 242 away from the forming mold 1. At this time, the connector 233 will restrict the corresponding tension sleeve 242 from leaving the tension rod 22, thereby achieving tensioning of the steel bar bundle. Then, the user can inject concrete into the mold cavity while keeping the steel bar bundle tensioned. After the concrete has solidified, the user can start each rotary motor to drive each fixed sleeve 241 and each tensioning sleeve 242 to rotate along the loosening direction of their own screw holes. At the same time, each drive cylinder 234 drives each moving frame 232 to cooperate with each fixed sleeve 241 and each tensioning sleeve 242 to disengage from the corresponding screw end and move away from the forming mold 1. At this time, the snap-fit ​​part 233 will first disengage from the snap-fit ​​groove 222 opened on one side of the tension snap-fit ​​block 221, and then abut against the other side of the tension snap-fit ​​block 221 and restrict the tension snap-fit ​​block 221 to rotate inside the tensioning sleeve 242. This allows the tensioning rod 22 to rotate with the tensioning sleeve 242, and the fixed rod 21 will also rotate with the fixed sleeve 241. As a result, each fixed sleeve 241 and tensioning sleeve 242 can separate from the corresponding screw end, and the formed prestressed track slab can be taken out from the forming mold 1. Compared to existing technologies that use fixed platforms and require manual torque wrenches to lock and unlock tension, this device avoids manual operation, reduces operating time and the number of workers required, eliminates inconsistent locking effects caused by differences in manual operation force, reduces fluctuations in tension accuracy, improves tension accuracy, and meets the requirements of modern production lines for continuous, fast, and standardized operations, thereby improving the overall efficiency of track slab production.

[0033] See Figure 10The bottom of the bottom mold 11 is provided with a limiting block 111. The forming enclosure 12 is provided with a limiting hole along the length of the tension rod 22. The tensioning hole and the limiting hole are arranged vertically opposite each other with the bottom mold 11 as the center. The limiting block 111 is inserted into the limiting hole. When the moving frame 232 moves away from the mold cavity and tensions the steel bar bundle, the limiting block 111 can abut against the bottom wall of the limiting hole and restrict the part of the forming enclosure 12 that is higher than the bottom mold 11 from flipping around the abutment point between the forming enclosure 12 and the bottom mold 11 into the mold cavity, so as to ensure the stability of the mold structure. To prevent the forming enclosure 12 from overturning and deforming during the tensioning of the reinforcing bars, thus ensuring the forming quality of the prestressed track slab, a sealing groove is provided along the circumferential direction on the inner wall of the forming enclosure 12, and a sealing strip 123 is provided in the sealing groove. The sealing strip 123 can be made of rubber, so that when the forming enclosure 12 is assembled with the bottom mold 11, the sealing strip 123 abuts against the side wall of the bottom mold 11 and prevents concrete and other materials from leaking from the joint between the forming enclosure 12 and the bottom mold 11, thereby improving the sealing performance of the mold and ensuring the forming quality of the track slab.

[0034] See Figure 4 , Figure 6 and Figure 7 Each arching assembly 3 includes an arching screw 31, abutment nuts 32, and a driving component 33. The driving component 33 can be a through-hole jack. Each end mold 121 has a row of arching holes. One end of the arching screw 31 passes through one of the two arching holes and is screwed to the abutment nut 32. The other end of the arching screw 31 passes sequentially through the other of the two arching holes and the through hole of the through-hole jack and is connected to the through-hole jack. This allows the user to drive the arching screw 31 with the through-hole jack to move the abutment nut 32 closer to the end mold 121 away from the abutment nut 32, so that the middle of the bottom mold 11... The top arches upwards and forms an arc-shaped surface, which can meet the needs of different arc surfaces in the production of track plates and improve the applicability and quality of track plates. The bottom mold 11 has ejection holes that open to the outside in the vertical direction near the four corners of the top. The ejection holes correspond one-to-one with the ejection components 4. Each ejection component 4 includes an ejector rod 41 and an ejection cylinder 42. The ejector rod 41 is inserted into the ejection hole. The piston rod of the ejection cylinder 42 is connected to the ejector rod 41 and can drive the ejector rod 41 away from or into the mold cavity along the ejection hole. Thus, the prestressed track plate can be ejected from the forming mold 1 through the ejection components 4 to achieve demolding.

[0035] See Figure 5 , Figure 6 , Figure 7 and Figure 8In the second embodiment, the arching assembly 3 further includes a liquid-filled bladder 34, a limiting box 35, a fixing plate 36, and a clamping plate 37. The opening of the limiting box 35 is connected to the bottom of the bottom mold 11, forming an expansion cavity between them. A clamping hole leading to the outside is provided on the inner bottom wall of the expansion cavity. The top of the fixing plate 36 is connected to one side opening of the clamping hole. A clearance hole is provided on the surface of the fixing plate 36. A connecting screw hole is provided on the clamping plate 37. An arching screw 31 located in the middle of the bottom mold 11 passes through the clearance hole and is screwed into the connecting screw hole. The liquid-filled bladder 34 contains liquid and includes a lifting part 342 and two clamping parts 341. The two clamping parts 341 extend downward to the space between the clamping plate 37 and the fixing plate 36. The lifting part 342 is located in the expansion cavity and abuts against the inner wall of the expansion cavity, so that the arching screw 34 can be properly positioned. When the abutment nut 32 is brought close to one of the two end molds 121 away from the abutment nut 32, the arching screw 31 can bring the clamping plate 37 close to the fixed plate 36 and compress the clamping part 341, thereby causing the lifting part 342 to push the middle part of the bottom mold 11 to arch upward and form an arc-shaped surface on the top of the bottom mold 11. It can be understood that the setting of the liquid-filled bladder 34 makes the middle part of the bottom mold 11 receive an upward abutment force from the lifting part 342 at the moment of arching, ensuring that the bottom mold 11 only arches upward in the middle when it is clamped by the two end molds 121, forming a large arched arc surface on the inner bottom wall of the mold cavity, avoiding the bottom mold 11 from sinking downward or multiple parts bulging or sinking, improving the success rate of the arching assembly 3 in arching the bottom mold 11, making the deformation of the bottom mold 11 more controllable, and ensuring that the molding mold 1 can produce molded parts with different arc-shaped bottoms.

[0036] Specifically, a clamping part 341 has a liquid injection port leading to the interior of the liquid-filled bladder 34. The edge of the liquid injection port has a convex ring with external threads, and a sealing cap 3411 is screwed onto the convex ring so that the liquid injection port can be used to inject liquid into the liquid-filled bladder 34 to adjust the amount of liquid in the liquid-filled bladder 34 and meet the requirements of the arching height of the bottom mold 11 under different working conditions. The detachable sealing cap 3411 can seal the liquid injection port after the liquid injection is completed to prevent the liquid in the liquid-filled bladder 34 from leaking and ensure the normal operation of the arching assembly 3.

[0037] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be included within the scope of protection of this application.

Claims

1. A prestressed track slab mold device, characterized in that: It includes a forming mold (1) and a tensioning assembly (2). The top of the forming mold (1) is formed with a mold cavity suitable for accommodating the steel bar bundle. Tensioning holes and fixing holes that lead to the outside are opened opposite each other on the side wall of the mold cavity. The tensioning assembly (2) includes a fixing rod (21), a tensioning rod (22), and a tensioning unit (23). One end of the fixing rod (21) extends through the fixing hole into the mold cavity and is detachably connected to the reinforcing bar bundle. A fixing protrusion (211) is formed on the other end of the fixing rod (21), and the fixing protrusion (211) abuts against the opening of the fixing hole on the side away from the mold cavity. One end of the tensioning rod (22) extends through the tensioning hole into the mold cavity and is detachably connected to the reinforcing bar bundle. The tensioning unit (23) includes a slide rail (231), a moving frame (232), a snap-fit ​​component (233), and a... The drive cylinder (234) is provided. The slide rail (231) is arranged along the length direction of the tensioning hole. The movable frame (232) is arranged on the slide rail (231). The snap-fit ​​member (233) is arranged on the movable frame (232) and is detachably connected to one end of the tensioning rod (22) away from the mold cavity. The drive cylinder (234) is connected to the movable frame (232) and can drive the movable frame (232) to move along the slide rail (231) closer to the fixed protrusion (211) or away from the fixed protrusion (211) and tension the steel bar bundle between the tensioning rod (22) and the fixed rod (21).

2. The prestressed track slab mold device according to claim 1, characterized in that: The tensioning assembly (2) further includes an unlocking unit (24), which includes a fixing sleeve (241), a tensioning sleeve (242), and a rotating component (243). The reinforcing bar bundle is provided with multiple screw ends. One end of the tensioning rod (22) and the end of the fixing rod (21) away from the fixing protrusion (211) are both provided with screw holes adapted to the screw ends. The other end of the tensioning rod (22) is provided with a tensioning block (221) and a locking groove (222). The end of the fixing rod (21) near the fixing protrusion (211) can... Inserted into the fixed sleeve (241), the inner wall of the fixed sleeve (241) can abut against the fixed rod (21) and restrict the fixed rod (21) from rotating inside the fixed sleeve (241). The tensioning sleeve (242) is provided on the movable frame (232). The snap-fit ​​member (233) is provided on the inner wall of the tensioning sleeve (242). The rotating member (243) is connected to both the fixed sleeve (241) and the tensioning sleeve (242) and can drive the fixed sleeve (241) and the tensioning sleeve (242) to rotate. When the movable frame (232) approaches the mold cavity, the tensioning block (221) can be inserted into the tensioning sleeve (242). After the tensioning sleeve (242) rotates along the tightening direction of the screw hole of the tensioning rod (22), it is sleeved on the snap-fit ​​member (233) via the snap-fit ​​groove (222) and rotates with the tensioning sleeve (242). Then, when the movable frame (232) moves away from the mold cavity, the snap-fit ​​member (233) is positioned so that the tensioning sleeve (242) faces away from the snap-fit ​​member (233). One side of the cylinder opening abuts against the groove wall of the locking groove (222) and restricts the tensioning sleeve (242) from leaving the tensioning rod (22), or after the tensioning sleeve (242) rotates along the loosening direction of the screw hole of the tensioning rod (22), it abuts against the locking member (233) via the tensioning block (221) and follows the rotation of the tensioning sleeve (242), and then allows the tensioning sleeve (242) to leave the tensioning rod (22) when the moving frame (232) moves away from the mold cavity.

3. The prestressed track slab mold device according to claim 1, characterized in that: The molding mold (1) includes a bottom mold (11) and a molding enclosure (12). The bottom mold (11) is abutted within the molding enclosure (12) and forms the mold cavity between the top of the bottom mold (11) and the inner wall of the molding enclosure (12). The molding enclosure (12) includes two end molds (121) and two side molds (122). The two end molds (121) and the two side molds (122) are arranged opposite each other with the bottom mold (11) as the center. Each end mold (121) has a fixing hole (1211) at both ends. Each side mold (122) has a connecting hole at both ends. The two end molds (121) can be connected to the adjacent side molds (122) by bolts passing through the fixing holes (1211) and the adjacent connecting holes in sequence and screwed with nuts. The two end molds (121) are then assembled with the two side molds (122) to form the molding enclosure (12).

4. The prestressed track slab mold device according to claim 3, characterized in that: The bottom of the bottom mold (11) is provided with a limiting block (111). The forming enclosure (12) is provided with a limiting hole along the length direction of the tension rod (22). The tensioning hole and the limiting hole are arranged vertically opposite each other with the bottom mold (11) as the center. The limiting block (111) is inserted into the limiting hole. When the moving frame (232) moves away from the mold cavity and tensions the steel bar bundle, the limiting block (111) can abut against the bottom wall of the limiting hole and restrict the part of the forming enclosure (12) that is higher than the bottom mold (11) to flip around the abutment of the forming enclosure (12) and the bottom mold (11) into the mold cavity.

5. The prestressed track slab mold device according to claim 3, characterized in that: A sealing groove is provided on the inner wall of the molded enclosure (12) along the circumferential direction, and a sealing strip (123) is provided in the sealing groove. When the molded enclosure (12) and the bottom mold (11) are assembled, the sealing strip (123) abuts against the side wall of the bottom mold (11).

6. The prestressed track slab mold device according to claim 3, characterized in that: It also includes an arching assembly (3), which is connected to the two end molds (121) and can drive the two end molds (121) to move closer to each other so that the middle part of the bottom mold (11) arches upward and forms an arc-shaped surface on the top of the bottom mold (11).

7. A prestressed track slab mold device according to claim 6, characterized in that: The arching assembly (3) includes an arching screw (31), an abutment nut (32), and a driving member (33). Each end mold (121) has an arching hole. One end of the arching screw (31) passes through one of the two arching holes and is screwed to the abutment nut (32). The other end of the arching screw (31) passes through the other of the two arching holes and is connected to the driving member (33). The driving member (33) can drive the arching screw (31) to move the abutment nut (32) closer to the one of the two end molds (121) that is away from the abutment nut (32).

8. The prestressed track slab mold device according to claim 7, characterized in that: The arching assembly (3) also includes a liquid-filled bladder (34), a limiting box (35), a fixing plate (36), and a clamping plate (37). The opening of the limiting box (35) is connected to the bottom of the bottom mold (11) and forms an expansion cavity between them. A clamping hole leading to the outside is provided on the inner bottom wall of the expansion cavity. The top of the fixing plate (36) is connected to one side opening of the clamping hole. A clearance hole is provided on the surface of the fixing plate (36). A connecting screw hole is provided on the clamping plate (37). The arching screw (31) passes through the clearance hole and is screwed into the connecting screw hole. The liquid-filled bladder (34) includes a clamping part (341) and a lifting part (37). 42) The clamping part (341) extends downward between the clamping plate (37) and the fixing plate (36). The lifting part (342) is located in the expansion cavity and abuts against the inner wall of the expansion cavity. When the arching screw (31) drives the abutting nut (32) to approach one of the two end molds (121) away from the abutting nut (32), the arching screw (31) can drive the clamping plate (37) to approach the fixing plate (36) and compress the clamping part (341), thereby causing the lifting part (342) to push the middle part of the bottom mold (11) to arch upward and form an arc-shaped surface on the top of the bottom mold (11).

9. A prestressed track slab mold device according to claim 8, characterized in that: The clamping part (341) is provided with an injection port leading to the interior of the liquid-holding bladder (34), and a sealing cap (3411) is detachably connected to the injection port.

10. A prestressed track slab mold device according to claim 1, characterized in that: It also includes an ejection assembly (4), which includes an ejector rod (41) and an ejection cylinder (42). An ejection hole leading to the outside is provided on the inner bottom wall of the mold cavity in the vertical direction. The ejector rod (41) is inserted into the ejection hole. The ejection cylinder (42) is connected to the ejector rod (41) and can drive the ejector rod (41) away from or into the mold cavity along the ejection hole.

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