Internal formwork stand for pipe gallery construction

Abstract

The invention discloses an inner mold stand for pipe gallery construction, comprising a door frame, a movable column, a column lifting support leg, a side template, a top template, a translation driver, a transmission assembly and a motor; the movable column is located on both sides of the door frame, and the top of the movable column is slidably installed with the outer end of the top door beam of the door frame; the side template is installed on the movable column, and the top template is installed on the top door beam of the door frame. The movable column is connected to the door frame inside it through a translation driver, and the movable column is driven to translate through the translation driver, thereby realizing the translation movement of the side template; the bottom of each movable column is provided with a column lifting support leg, and the height of the entire inner mold frame is adjusted through the column lifting support leg. During construction, the inner mold frame can automatically adjust the side template position and its own height, thereby realizing the side template and the top template in place and demoulding work.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe gallery concrete construction, and particularly relates to an inner formwork stand for pipe gallery construction. Background Art

[0002] With the rapid development of urbanization, urban land resources are becoming increasingly scarce, while urban construction projects and public facilities are increasing. Especially in the construction of various pipelines, if the planning and design are improper, repeated excavation will occur, which will not only affect the normal traffic in the city, but also affect the service life of various pipelines. By applying comprehensive pipeline corridor construction technology, the above problems can be effectively solved to ensure the safe operation of various pipelines. Existing pipeline corridor concrete construction mostly uses wooden molds, steel molds, etc., which take a long time to disassemble and assemble, and the templates need to be frequently disassembled and assembled, making it difficult to control the overall concrete quality of the pipeline corridor. In addition, the construction mostly relies on manual work, which has high labor intensity, high risk factor, and low mechanization. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an inner mold stand for pipe gallery construction to solve the problems of high labor intensity of wooden molds and steel molds used in pipe gallery construction, poor concrete molding quality, long disassembly and assembly time, low degree of mechanization, etc., so as to ensure the quality of concrete molding, ensure the construction period, and reduce the project cost.

[0004] The present invention is achieved through the following technical solutions:

[0005] An inner formwork stand for pipe gallery construction, comprising a door frame, a movable column, a column lifting support leg, a side formwork, a top formwork, a translation driver, a transmission assembly and a motor;

[0006] The movable columns are located on both sides of the gantry, and the tops of the movable columns are slidably mounted on the outer end flange plates of the top door beams of the gantry through translation slides;

[0007] The side template is installed on the movable column, and the top template is installed on the top door beam of the door frame;

[0008] Each movable column is connected to the door frame inside it through N translation drives, N ≥ 1, and the translation drive drives the movable column to move in translation, thereby driving the translation movement of the side template;

[0009] The motor is installed on the gantry, and the transmission assembly is used to realize the transmission link between the motor and the translation driver. When the motor is started, the motor drives the translation driver to move through the transmission assembly, and the translation driver then drives the movable column connected thereto to move in translation, thereby realizing the horizontal movement of the side template;

[0010] A column lifting support leg is arranged at the bottom of each movable column, and the height of the entire inner mold stand is adjusted by the column lifting support leg.

[0011] In the above technical solution, the door frame is composed of a top door beam, a bottom cross brace and side vertical braces. The side vertical braces are fixed between the top door beam and the bottom cross brace, and a side vertical brace is arranged on both sides of each bottom cross brace.

[0012] In the above technical solution, the translation driver includes a lead screw, a rotating nut, a thrust bearing seat and a transmission sprocket. The thrust bearing seat is fixedly mounted on the door frame by bolts, the rotating nut is installed in the thrust bearing seat, the lead screw is installed in the rotating nut, the outer end of the lead screw is connected to the movable column, and the transmission sprocket is fixedly mounted on the rotating nut. When the transmission sprocket is driven to rotate, the transmission sprocket will drive the rotating nut to rotate in the thrust bearing seat. When the rotating nut rotates, it drives the lead screw inside it to perform an axial ejection or contraction movement, and then the lead screw drives the movable column connected to it to translate.

[0013] In the above technical solution, the transmission assembly includes a transmission shaft, a transition sprocket fixedly mounted in the middle of the transmission shaft, end sprockets fixedly mounted at both ends of the transmission shaft, and a driving sprocket mounted on the rotating shaft of the motor, the transmission shaft is horizontally mounted on the two side vertical supports of the door frame, the driving sprocket on the motor rotating shaft is linked to the transition sprocket on the transmission shaft through a chain, the end sprockets at both ends of the transmission shaft are double-row sprockets, and each end sprocket is linked to the transmission sprockets on the two translation drivers on the same side through two chains. When the motor is started, the driving sprocket on the motor rotating shaft drives the transmission shaft to rotate through the transition sprocket linked thereto, so that the end sprockets at both ends of the transmission shaft rotate synchronously, the end sprocket drives the transmission sprocket on the rotating nut of the translation driver to rotate through the chain, the transmission sprocket will drive the rotating nut to rotate in the thrust bearing seat, and when the rotating nut rotates, it drives the lead screw inside it to perform ejection or contraction movement along the axial direction, and then the lead screw drives the movable column connected thereto to translate, so as to realize the horizontal movement of the side template.

[0014] In the above technical solution, the inner mold platform can be longitudinally spliced ​​into the required size by multiple inner mold platform units to adapt to different construction needs. Each inner mold platform unit includes two door frames, four movable columns, eight translation drives, a motor and a transmission shaft; the two door frames are longitudinally spaced apart from each other, and a movable column is arranged on each side of each door frame. The front and rear movable columns on the same side are connected by a longitudinal beam and a scissors brace, and each movable column is connected to the inner door frame part through two translation drives; the motor and the transmission shaft are installed on one of the door frames The driving sprocket on the motor shaft is linked to the transition sprocket on the transmission shaft through a chain, and the end sprockets at both ends of the transmission shaft are double-row sprockets, and each end sprocket is linked to the transmission sprockets on the two translation drivers on the same side thereof through two chains in a one-to-one correspondence; and the transmission sprockets of the four translation drivers on the gantry on which the motor and the transmission shaft are installed are also double-row sprockets, and these double-row sprockets are linked to the transmission sprockets of the four translation drivers on the other gantry in a front-to-back correspondence, thereby realizing synchronous linkage of eight translation drivers under the drive of one motor.

[0015] In the above technical scheme, the specific installation structure of the thrust bearing seat and the rotating nut of the translational drive is as follows: one end of the rotating nut has a flange; the thrust bearing seat includes an upper cover and a base, the upper cover and the base are butt-jointed together by bolts, an installation cavity is formed between the upper cover and the base, the flange of the rotating nut is installed in the installation cavity, and a plurality of circles of balls or lubrication slides are arranged between the upper surface of the flange of the rotating nut and the upper cover of the thrust bearing seat, a plurality of circles of balls or lubrication slides are also arranged between the lower surface of the flange of the rotating nut and the base of the thrust bearing seat, and a plurality of circles of balls or lubrication slides are also arranged between the outer side surface of the flange of the rotating nut and the upper cover of the thrust bearing seat. This structure enables balls to be present axially and radially between the rotating nut and the thrust bearing seat, thereby not only enabling the translational drive to withstand sufficient axial thrust, but also to withstand a certain radial pressure, thereby enhancing the service life and working stability of the translational drive.

[0016] In the above technical solution, an oil filling hole communicating with the internal mounting cavity of the thrust bearing seat is provided on the upper cover thereof for injecting lubricating oil, and a sealing nozzle is installed in cooperation with the oil filling hole.

[0017] In the above technical scheme, the structure of the transmission shaft is: the transmission shaft includes a first rotating shaft, a second rotating shaft, a first bearing seat, a second bearing seat and an intermediate connecting shaft, the first rotating shaft is installed on one of the side vertical supports of the portal frame through the first bearing seat, the second rotating shaft is installed on the other side vertical support of the portal frame through the second bearing seat, the outer end of the first rotating shaft is fixedly installed with an end sprocket through a key, the inner end of the first rotating shaft is connected to one end of the intermediate connecting shaft through a flange, and the transition sprocket is fixedly installed on the first rotating shaft; the outer end of the second rotating shaft is fixedly installed with another end sprocket through a key, and the inner end of the second rotating shaft is flange-connected to the other end of the intermediate connecting shaft.

[0018] In the above technical solution, the side formwork includes a straight formwork and a top corner formwork, the straight formwork is vertically arranged and fixed on the movable column through the back rib, and the top corner formwork is fixedly connected to the top of the straight formwork; the top formwork includes a straight formwork and a side corner formwork, the straight formwork is horizontally arranged and fixed on the top door beam of the door frame through the back rib, and the side corner formwork is fixedly connected to the left and right ends of the straight formwork; a support assembly is also provided between the top corner formwork and the movable column of the side formwork, and the support strength of the corner formwork is strengthened by the support assembly.

[0019] In the above technical solution, the support assembly includes a back rib, a first hinged support, a second hinged support and a connecting rod. The back rib is welded to the back side of the top corner template, the top end of the connecting rod is installed on the back rib through the first hinged support, and the bottom end of the connecting rod is installed on the movable column through the second hinged support.

[0020] In the above technical solution, the back rib on the back side of the top corner formwork must be exposed a certain distance from the top of the top corner formwork. The purpose of this is that when the movable column drives the entire side formwork to open outward into place, the exposed part of the back rib can support the side corner formwork of the top formwork, thereby ensuring the supporting strength of the entire corner formwork.

[0021] The method of using the inner mold stand for pipe gallery construction of the present invention is as follows:

[0022] Before the lining of the tunnel, the inner mold stand is transported to the designated position, and then the inner mold stand is lifted (for example, the entire inner mold stand is lifted with a hydraulic jack under the portal frame), so that the column lifting support legs at the bottom of the movable column are off the ground, and then the motor on the inner mold stand is started, and the movable column is driven to translate outward through the translation driver, driving the side formwork to move to the designated construction position; then the height of the column lifting support legs is extended, so that the column lifting support legs support the ground and the top formwork on the top of the inner mold stand is adjusted to the designated construction position, thereby completing the placement of the side formwork and the top formwork.

[0023] After the lining work is completed, when demoulding is required, first use a hydraulic jack to support it under the gantry, then retract the column lifting support legs, and then control the movable column to drive the side formwork to move horizontally toward the center line of the tunnel to complete the demoulding of the side formwork; then lower the hydraulic jack to lower the height of the entire inner mold gantry, and then complete the demoulding of the top formwork.

[0024] The advantages and beneficial effects of the present invention are:

[0025] 1. The inner formwork stand of the present invention can be freely spliced ​​horizontally and vertically into required sizes to meet the construction needs of concrete pipe galleries of different specifications; the bottom of the movable column of the inner formwork stand is provided with liftable legs, which can adjust the support height of the entire inner formwork stand to meet the needs of different sections.

[0026] 2. The inner mold stand of the present invention can be longitudinally spliced ​​with multiple inner mold stand units, each of which includes two door frames, four movable columns, eight translation drives, a motor and a transmission shaft, so that one motor can drive eight translation drives to move synchronously at the same time. It has a simple structure, stable operation, easy operation and low manufacturing cost.

[0027] 3. The inner mold stand uses a dedicated translation driver to drive the movable column to move horizontally, thereby realizing the horizontal movement of the side mold plate. The translation driver has a reasonable design, stable structure, and strong bearing capacity. There are balls or lubricating slideways between the rotating nut and the thrust bearing seat of the translation driver in the axial and radial directions, so that the translation driver can not only withstand sufficient axial thrust, but also withstand a certain radial pressure, which can enhance the service life and working stability of the translation driver.

[0028] 4. The inner mold stand for pipe gallery construction of the present invention can realize the automatic positioning and demoulding of the side template and the top template. Before the pipe gallery is lined, the inner mold stand is transported to the designated position, and then the inner mold stand is lifted (for example, the entire inner mold stand is lifted by a hydraulic jack under the portal frame), so that the column lifting support legs at the bottom of the movable column are separated from the ground, and then the motor on the inner mold stand is started, and the movable column is driven to translate outward through the translation driver, driving the side template to move to the designated construction position; then the height of the column lifting support legs is extended, so that the column lifting support legs support the ground and the top template on the top of the inner mold stand is adjusted to the designated construction position, thereby completing the positioning of the side template and the top template. After the lining work is completed, when demoulding is required, first support it with a hydraulic jack under the portal frame, then retract the column lifting support legs, and then control the movable column to drive the side template to move horizontally toward the center line of the tunnel to complete the demoulding of the side template; then lower the hydraulic jack to lower the height of the entire inner mold stand, and then complete the demoulding of the top template.

[0029] In summary, the inner formwork stand for pipe gallery construction of the present invention can effectively reduce the labor intensity of workers, ensure the quality of concrete lining, and improve the mechanization degree of pipe gallery construction. It has a simple structure, a reasonable design, and is suitable for use in pipe gallery concrete construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the cross-sectional structure of the inner mold stand for pipe gallery construction of the present invention.

[0031] Figure 2 It is a schematic diagram of the longitudinal section structure of the inner mold stand for pipe gallery construction of the present invention.

[0032] Figure 3 yes Figure 2 A partial enlarged view of the top of the movable column.

[0033] Figure 4 It is a schematic structural diagram of the translation driver in the present invention.

[0034] Figure 5 It is a side view of the translation driver in the present invention.

[0035] Figure 6 It is a schematic diagram of the enlarged structure between the rotating nut and the thrust bearing seat of the translation driver of the present invention.

[0036] Figure 7 It is a left structural schematic diagram of the transmission assembly of the inner mold stand of the present invention.

[0037] Figure 8 It is a right side structural schematic diagram of the transmission assembly of the inner mold stand of the present invention.

[0038] Fig. 9 It is a schematic structural diagram of the corner of the inner mold stand of the present invention.

[0039] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with specific embodiments.

[0041] Embodiment 1

[0042] An inner formwork stand for pipe gallery construction comprises a door frame 1, a movable column 2, a column lifting support leg 3, a side formwork 4, a top formwork 5, a translation driver 6, a transmission assembly and a motor 8.

[0043] The door frame 1 is composed of a top door beam 1-1, a bottom cross brace 1-2 and a side vertical brace 1-3. The top door beam is made of H-shaped steel or steel plates welded into an H shape, and can be made of multiple sections bolted together to meet the use of sections with different widths; the side vertical brace 1-3 is fixedly arranged between the top door beam 1-1 and the bottom cross brace 1-2, and plays the role of connecting the top door beam and the bottom cross brace. A side vertical brace 1-3 is arranged on both sides of each bottom cross brace;

[0044] The movable columns 2 are located on both sides of the lateral (width direction) of the door frame 1, that is, a movable column 2 is arranged on each side of each door frame 1; a translation slide 2-1 is provided at the top of the movable column, and the top of the movable column is slidably installed with the outer end flange plate of the top door beam 1-1 of the door frame through the translation slide; further, the movable column is located on the outside of the side vertical support of the door frame.

[0045] The side formwork 4 is installed on the movable column 2, and the top formwork 5 is installed on the top door beam 1-1 of the door frame.

[0046] Each movable column 2 is connected to the door frame inside it through two translation drives 6 (preferably, one translation drive is installed on the side vertical support of the door frame, and the other translation drive is installed on the bottom horizontal support end of the door frame; or both translation drives can be installed on the side vertical supports). The movable column 2 is driven to move in translation by the translation drive 6, thereby realizing the translation movement of the side formwork to meet the positioning and demoulding actions of the side formwork.

[0047] The translation driver 6 includes a lead screw 6-1, a rotating nut 6-2, a thrust bearing seat 6-3 and a transmission sprocket 6-4. The thrust bearing seat 6-3 is fixedly installed on the door frame by bolts, the rotating nut 6-2 is installed in the thrust bearing seat 6-3, the lead screw 6-1 is installed in the rotating nut 6-2, the outer end of the lead screw is connected to the movable column 2, and the transmission sprocket 6-4 is fixedly sleeved on the rotating nut 6-2 by a key a. When the transmission sprocket 6-4 is driven to rotate, the transmission sprocket will drive the rotating nut 6-2 to rotate in the thrust bearing seat 6-3. When the rotating nut rotates, it drives the lead screw 6-1 inside it to perform an axial ejection or contraction movement, and then the lead screw drives the movable column 2 connected thereto to translate.

[0048] The transmission assembly is used to realize the transmission link between the motor 8 and the translation driver 6. Specifically, the transmission assembly includes a transmission shaft 7-1, a transition sprocket 7-2 fixedly installed in the middle of the transmission shaft, end sprockets 7-3 fixedly installed at both ends of the transmission shaft, and a driving sprocket 7-4 installed on the motor shaft. The transmission shaft is horizontally installed on the two side vertical supports of the door frame. The motor 8 is fixed to one of the side vertical supports of the door frame through a motor mounting seat. The driving sprocket 7-4 on the motor shaft is linked to the transition sprocket 7-2 on the transmission shaft through a chain. The end sprockets 7-3 at both ends of the transmission shaft both adopt double-row sprockets (that is, the sprockets have double-row sprocket teeth). Each end sprocket 7-3 is linked to the transmission sprockets 6-4 on the two translation drivers 6 on the same side thereof through two chains. When the motor 8 is started, the active sprocket on the motor shaft drives the transmission shaft 7-1 to rotate through the transition sprocket connected to it, so that the end sprockets at both ends of the transmission shaft rotate synchronously, and the end sprockets drive the transmission sprocket 6-4 on the rotating nut of the translation driver 6 to rotate through the chain. The transmission sprocket will drive the rotating nut 6-2 to rotate in the thrust bearing seat. When the rotating nut rotates, it drives the lead screw 6-1 inside it to perform axial ejection or contraction movement, and then the lead screw drives the movable column 2 connected to it to translate, thereby realizing horizontal movement of the side template.

[0049] A column lifting support leg 3 is provided at the bottom of each movable column 2, and the height of the entire inner mold stand is adjusted by the column lifting support leg.

[0050] The method of using the inner mold stand for pipe gallery construction of the present invention is as follows:

[0051] Before the lining of the tunnel, the inner mold stand is transported to the designated position, and then the inner mold stand is lifted (for example, the entire inner mold stand is lifted with a hydraulic jack under the portal frame), so that the column lifting support legs at the bottom of the movable column are off the ground, and then the motor on the inner mold stand is started, and the movable column is driven to translate outward through the translation driver, driving the side formwork to move to the designated construction position; then the height of the column lifting support legs is extended, so that the column lifting support legs support the ground and the top formwork on the top of the inner mold stand is adjusted to the designated construction position, thereby completing the placement of the side formwork and the top formwork.

[0052] After the lining work is completed, when demoulding is required, first use a hydraulic jack to support it under the gantry, then retract the column lifting support legs, and then control the movable column to drive the side formwork to move horizontally toward the center line of the tunnel to complete the demoulding of the side formwork; then lower the hydraulic jack to lower the height of the entire inner mold gantry, and then complete the demoulding of the top formwork.

[0053] Embodiment 2

[0054] On the basis of the first embodiment, further speaking, the inner mold stand can be longitudinally spliced ​​into a required size by a plurality of inner mold stand units to meet different construction needs, and each inner mold stand unit can realize a motor 8 driving eight translation drivers 6 to move synchronously at the same time. Specifically, each inner mold stand unit includes two door frames 1, four movable columns 2, eight translation drivers 6, a motor 8 and a transmission shaft 7-1.

[0055] The two door frames are arranged longitudinally at intervals in front and behind, and a movable column is arranged on both sides of the transverse (width direction) of each door frame. The front and rear movable columns on the same side are connected by a longitudinal beam 9 and a scissor brace 10, which plays a role in stabilizing the structure and preventing the inner mold stand unit from being deformed by force. Each movable column 2 is connected to the door frame part inside it through two translation drives 6, that is, four translation drives 6 are installed on each door frame 1; the motor 8 and the transmission shaft 7-1 are installed on one of the door frames, and the active sprocket 7-4 on the motor shaft is connected to the transmission through a chain. The transition sprocket 7-2 on the shaft is linked, and the end sprockets 7-3 at both ends of the transmission shaft are double-row sprockets, and each end sprocket is connected one-to-one with the transmission sprockets 6-4 on the two translation drivers 6 on the same side through two chains; and the transmission sprockets of the four translation drivers on the gantry on which the motor and the transmission shaft are installed also use double-row sprockets, and these double-row sprockets are respectively connected one-to-one (longitudinally) with the transmission sprockets of the four translation drivers on the other gantry, thereby realizing the synchronous linkage of eight translation drivers under the drive of one motor.

[0056] Embodiment 3

[0057] On the basis of the first embodiment, further speaking, see the attached Figure 6The specific installation structure of the thrust bearing seat 6-3 and the rotating nut 6-2 of the translation driver 6 is as follows: one end of the rotating nut 6-2 has a flange 6-21; the thrust bearing seat 6-3 includes an upper cover 6-31 and a base 6-32, the upper cover 6-31 and the base 6-32 are connected together by bolts, and an installation cavity is formed between the upper cover 6-31 and the base 6-32, and the flange 6-21 of the rotating nut 6-2 is installed in the installation cavity, and a plurality of rollers are arranged between the upper surface of the flange 6-21 of the rotating nut 6-2 and the upper cover 6-31 of the thrust bearing seat 6-3. Ball 6-3a, a plurality of circles of balls 6-3b are also arranged between the lower surface of the flange 6-21 of the rotating nut 6-2 and the base 6-32 of the thrust bearing seat 6-3, and a plurality of circles of balls 6-3c are also arranged between the outer side surface of the flange 6-21 of the rotating nut 6-2 and the upper cover 6-31 of the thrust bearing seat 6-3. This structure enables balls to be provided axially and radially between the rotating nut 6-2 and the thrust bearing seat 6-3, so that not only the translation drive 6 can withstand sufficient axial thrust, but also a certain radial pressure, which can enhance the service life and working stability of the translation drive 6.

[0058] Furthermore, an oil filling hole 6-33 connected to the internal mounting cavity of the thrust bearing seat 6-3 is provided on the upper cover 6-31, and is used for injecting lubricating oil. The oil filling hole is equipped with a sealing nozzle.

[0059] Furthermore, in order to simplify the installation between the thrust bearing seat 6-3 and the rotating nut 6-2, the balls 6-3a, 6-3b and 6-3c may not be provided, and instead, a plurality of circles of lubrication slides may be provided between the upper surface of the flange 6-21 of the rotating nut 6-2 and the upper cover 6-31 of the thrust bearing seat 6-3, a plurality of circles of lubrication slides may be provided between the lower surface of the flange 6-21 of the rotating nut 6-2 and the base 6-32 of the thrust bearing seat 6-3, and a plurality of circles of lubrication slides may be provided between the outer side surface of the flange 6-21 of the rotating nut 6-2 and the upper cover 6-31 of the thrust bearing seat 6-3. This ensures sufficient lubrication between the thrust bearing seat 6-3 and the rotating nut 6-2, simplifies the installation, and saves the manufacturing and processing costs.

[0060] Embodiment 4

[0061] On the basis of the first embodiment, further speaking, see the attached Figure 7-8The structure of the transmission shaft 7-1 is as follows: the transmission shaft 7-1 includes a first rotating shaft 7-11, a second rotating shaft 7-12, a first bearing seat 7-13, a second bearing seat 7-14 and an intermediate connecting shaft 7-15. The first rotating shaft 7-11 is installed on one of the side vertical supports of the door frame through the first bearing seat 7-13, and the second rotating shaft 7-12 is installed on the other side vertical support of the door frame through the second bearing seat 7-14. The outer end of the first rotating shaft 7-11 is fixedly installed with an end sprocket by a key, and the inner end of the first rotating shaft 7-1 is connected to one end of the intermediate connecting shaft 7-15 by a flange b. The transition sprocket 7-2 is fixedly installed on the first rotating shaft 7-11; the outer end of the second rotating shaft 7-12 is fixedly installed with another end sprocket by a key, and the inner end of the second rotating shaft 7-12 is flange-connected to the other end of the intermediate connecting shaft 7-15.

[0062] Furthermore, the intermediate connecting shaft 7-15 can be an integral shaft rod, or can be formed by splicing multiple shaft rods to meet the requirements of variable cross-section.

[0063] Embodiment 5

[0064] On the basis of the first embodiment, further speaking, see the attached Fig. 9 The side formwork 4 includes a straight formwork 4-1 and a top corner formwork 4-2. The straight formwork is arranged vertically and fixed to the movable column 2 through a back rib (the back rib adopts C-shaped steel). The top corner formwork 4-2 is fixedly connected to the top of the straight formwork 4-1.

[0065] The top template 5 includes a straight template 5-1 and a side corner template 5-2. The straight template is arranged horizontally and fixed to the top door beam 1-1 of the door frame through back ribs (the back ribs are made of C-shaped steel). The side corner template 5-2 is fixedly connected to the left and right ends of the straight template 5-1.

[0066] Furthermore, a support assembly 11 (combined with the attached Figure 1 ), the support strength of the corner formwork is strengthened by the support assembly; the support assembly includes a back rib 11-1, a first hinged support 11-2, a second hinged support 11-3 and a connecting rod 11-4, the back rib 11-1 is made of square steel and welded to the back side of the top corner formwork 4-2, the top end of the connecting rod 11-4 is installed on the back rib through the first hinged support, and the bottom end of the connecting rod is installed on the movable column through the second hinged support.

[0067] Furthermore, the back rib on the back of the top corner formwork should be exposed a certain distance from the top of the top corner formwork. The purpose of this is that when the movable column drives the entire side formwork to open outward into place, the exposed part of the back rib can support the side corner formwork of the top formwork, thereby ensuring the supporting strength of the entire corner formwork.

[0068] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0069] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0070] The present invention is described above by way of example. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by those skilled in the art without inventive effort falls within the protection scope of the present invention.

Claims

1. An inner mold stand for pipe gallery construction, characterized in that: It includes a door frame, a movable column, a column lifting support leg, a side template, a top template, a translation drive, a transmission assembly and a motor; The movable columns are located on both sides of the gantry, and the tops of the movable columns are slidably mounted on the outer end flange plates of the top door beams of the gantry through translation slides; The side template is installed on the movable column, and the top template is installed on the top door beam of the door frame; Each movable column is connected to the door frame inside it through N translation drives, N ≥ 1, and the translation drive drives the movable column to move in translation, thereby driving the translation movement of the side template; The motor is installed on the gantry, and the transmission assembly is used to realize the transmission link between the motor and the translation driver. When the motor is started, the motor drives the translation driver to move through the transmission assembly, and the translation driver then drives the movable column connected thereto to move in translation, thereby realizing the horizontal movement of the side template; A column lifting support leg is provided at the bottom of each movable column, and the height of the entire inner mold stand is adjusted by the column lifting support leg; The translation driver includes a lead screw, a rotating nut, a thrust bearing seat and a transmission sprocket. The thrust bearing seat is fixedly installed on the door frame by bolts, the rotating nut is installed in the thrust bearing seat, the lead screw is installed in the rotating nut, the outer end of the lead screw is connected to the movable column, and the transmission sprocket is fixedly sleeved on the rotating nut. When the transmission sprocket is driven to rotate, the transmission sprocket will drive the rotating nut to rotate in the thrust bearing seat. When the rotating nut rotates, it drives the lead screw inside it to perform ejection or contraction movement along the axial direction, and then the lead screw drives the movable column connected thereto to translate; The transmission assembly includes a transmission shaft, a transition sprocket fixedly installed in the middle of the transmission shaft, end sprockets fixedly installed at both ends of the transmission shaft, and a driving sprocket installed on the rotating shaft of the motor. The transmission shaft is transversely installed on the two side vertical supports of the door frame, and the driving sprocket on the motor rotating shaft is linked with the transition sprocket on the transmission shaft through a chain. The end sprockets at both ends of the transmission shaft adopt double-row sprockets, and each end sprocket is linked to the transmission sprockets on the two translation drivers on the same side through two chains in a one-to-one correspondence; when the motor is started, the driving sprocket on the motor rotating shaft drives the transmission shaft to rotate through the transition sprocket linked thereto, so that the end sprockets at both ends of the transmission shaft rotate synchronously, and the end sprockets drive the transmission sprocket on the rotating nut of the translation driver to rotate through the chain, and the transmission sprocket will drive the rotating nut to rotate in the thrust bearing seat, and when the rotating nut rotates, it drives the lead screw inside it to perform ejection or contraction movement along the axial direction, and then the lead screw drives the movable column connected thereto to translate movement, so as to realize the horizontal movement of the side template; The inner mold platform is composed of a plurality of inner mold platform units longitudinally spliced ​​into the required size to meet different construction needs. Each inner mold platform unit includes two door frames, four movable columns, eight translation drives, a motor and a transmission shaft; the two door frames are arranged longitudinally at intervals in front and back, and a movable column is arranged on each of the transverse sides of each door frame. The front and rear two movable columns on the same side are connected by longitudinal beams and scissors braces, and each movable column is connected to the door frame part on its inner side through two translation drives; the motor and the transmission shaft are installed on one of the door frames, and the active sprocket on the motor shaft is linked to the transition sprocket on the transmission shaft through a chain. The end sprockets at both ends of the transmission shaft are double-row sprockets, and each end sprocket is linked to the transmission sprockets on the two translation drives on the same side through two chains; and the transmission sprockets of the four translation drives on the door frames of the motor and the transmission shaft are also double-row sprockets, and these double-row sprockets are linked to the transmission sprockets of the four translation drives on the other door frame in a front-to-back correspondence, so as to realize the synchronous linkage of the eight translation drives under the drive of one motor; Method for using the inner formwork stand for pipe gallery construction: Before the lining of the pipe gallery, the inner mold stand is transported to the designated position, and then the inner mold stand is lifted, so that the column lifting support legs at the bottom of the movable column are off the ground, and then the motor on the inner mold stand is started, and the movable column is driven to translate outward through the translation driver, driving the side formwork to move to the designated construction position; then the height of the column lifting support legs is extended, so that the column lifting support legs support the ground and the top formwork on the top of the inner mold stand is adjusted to the designated construction position, thereby completing the placement of the side formwork and the top formwork; After the lining work is completed, when demoulding is required, first use hydraulic jacks to support under the gantry, then retract the column lifting support legs, and then control the movable columns to drive the side formwork to move horizontally toward the center line of the tunnel to complete the demoulding of the side formwork; then lower the hydraulic jacks to lower the height of the entire inner mold stand, and then complete the demoulding of the top formwork; The specific installation structure of the thrust bearing seat and the rotating nut of the translation driver is as follows: one end of the rotating nut has a flange; the thrust bearing seat includes an upper cover and a base, the upper cover and the base are butt-jointed together by bolts, an installation cavity is formed between the upper cover and the base, the flange of the rotating nut is installed in the installation cavity, and a plurality of circles of balls or lubrication slides are arranged between the upper surface of the flange of the rotating nut and the upper cover of the thrust bearing seat, a plurality of circles of balls or lubrication slides are also arranged between the lower surface of the flange of the rotating nut and the base of the thrust bearing seat, and a plurality of circles of balls or lubrication slides are also arranged between the outer side surface of the flange of the rotating nut and the upper cover of the thrust bearing seat. This structure enables balls to be provided axially and radially between the rotating nut and the thrust bearing seat, so that the translation driver can not only withstand sufficient axial thrust, but also withstand a certain radial pressure, thereby enhancing the service life and working stability of the translation driver; The transmission shaft includes a first rotating shaft, a second rotating shaft, a first bearing seat, a second bearing seat and an intermediate connecting shaft. The first rotating shaft is installed on one of the side vertical supports of the portal frame through the first bearing seat, and the second rotating shaft is installed on the other side vertical support of the portal frame through the second bearing seat. An end sprocket is fixedly installed on the outer end of the first rotating shaft through a key, and the inner end of the first rotating shaft is connected to one end of the intermediate connecting shaft through a flange, and the transition sprocket is fixedly installed on the first rotating shaft; another end sprocket is fixedly installed on the outer end of the second rotating shaft through a key, and the inner end of the second rotating shaft is flange-connected to the other end of the intermediate connecting shaft.

2. The inner mold stand for pipe gallery construction according to claim 1 is characterized in that: The door frame is composed of a top door beam, a bottom cross brace and side vertical braces. The side vertical braces are fixedly arranged between the top door beam and the bottom cross brace, and a side vertical brace is arranged on both sides of each bottom cross brace.

3. The inner mold stand for pipe gallery construction according to claim 1 is characterized in that: The side formwork includes a straight formwork and a top corner formwork, the straight formwork is arranged vertically and fixed on the movable column through a back rib, and the top corner formwork is fixedly connected to the top of the straight formwork; the top formwork includes a straight formwork and a side corner formwork, the straight formwork is arranged horizontally and fixed on the top door beam of the door frame through a back rib, and the side corner formwork is fixedly connected to the left and right ends of the straight formwork; a support assembly is also arranged between the top corner formwork and the movable column of the side formwork, and the support strength of the corner formwork is strengthened by the support assembly.

4. The inner mold stand for pipe gallery construction according to claim 3 is characterized in that: The support assembly includes a back rib, a first hinged support, a second hinged support and a connecting rod. The back rib is welded to the back side of the top corner template, the top end of the connecting rod is installed on the back rib through the first hinged support, and the bottom end of the connecting rod is installed on the movable column through the second hinged support.

5. The inner mold stand for pipe gallery construction according to claim 4 is characterized in that: The back rib on the back of the top corner formwork must be exposed a certain distance from the top of the top corner formwork. When the movable column drives the entire side formwork to open outward into place, the exposed part of the back rib can support the side corner formwork of the top formwork, thereby ensuring the supporting strength of the entire corner formwork.

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