A pre-pressed vertical group production shield segment mold and its implementation method

Abstract

The present invention discloses a pre-pressed vertical group production shield segment mold and its implementation method, comprising a clamping opening and closing mechanism and a plurality of mold bodies arranged side by side, a mold cavity is provided between two adjacent inner mold bodies, the mold cavity is used for pouring concrete, a moving mechanism is provided on each mold body device, the clamping opening and closing mechanism is respectively connected to each mold body, the clamping opening and closing mechanism clamps each mold body toward the middle, and a pressurizing device is connected to the mold cavity. The present invention occupies a small area, improves production efficiency, and improves the mechanical properties, impermeability and durability of concrete.

Description

Technical Field

[0001] The invention relates to the technical field of shield equipment, and in particular to a pre-pressed vertical group production shield segment mould and an implementation method thereof. Background Art

[0002] As the permanent lining structure of the tunnel, the quality of the shield segment is directly related to the overall quality and safety of the tunnel, and has high assembly accuracy, mechanical properties, waterproof performance and durability requirements. The segment production methods are mainly fixed mold method, fixed vibration table method and automated assembly line method. Various production methods use a single-piece horizontal steel mold and a steam curing production process. The above production processes have the disadvantages of low production efficiency, large footprint, and poor apparent quality of concrete segments. Summary of the invention

[0003] The technical problem to be solved by the present invention is, in view of the above-mentioned defects existing in the prior art, to provide a pre-compressed vertical group production shield segment mold and its implementation method, which occupies a small area, improves production efficiency, and improves the mechanical properties, impermeability and durability of concrete.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] A pre-pressed vertical group production shield segment mold includes a clamping opening and closing mechanism and a plurality of mold bodies arranged side by side. A mold cavity is provided between two adjacent inner mold bodies, and the mold cavity is used for pouring concrete. A moving mechanism is provided on each mold body device. The clamping opening and closing mechanism is respectively connected to each mold body, and the clamping opening and closing mechanism clamps each mold body toward the middle. The mold cavity is connected to a pressurizing device.

[0006] According to the above technical scheme, the moving mechanism includes a track assembly, a reducer and an adjustable crank or motor. A roller is provided at the bottom of the mold body, and the mold body is set on the track assembly through the roller. The adjustable crank or motor is connected to the input end of the reducer, and the output end of the reducer is connected to the rotating shaft of the roller through a coupling. The adjustable crank or motor drives the roller to rotate through the reducer via the coupling, so that the mold body moves along the track assembly through the roller.

[0007] According to the above technical solution, the clamping opening and closing mechanism includes a pull rod and a tensioning cylinder. The tensioning cylinder is arranged on the outermost mold body on one side. One end of the pull rod is connected to the tensioning cylinder, and the other end of the pull rod passes through the middle part of the mold body in turn and is connected to the outermost mold body on the other side.

[0008] According to the above technical solution, a cover plate is provided at the upper end of the mold cavity, and a bottom plate is provided at the bottom of the mold cavity, and both the cover plate and the bottom plate are connected to two adjacent mold bodies;

[0009] A vibrator is arranged on the mold body, the mold bodies at the outermost ends of the two sides are outer mold frames, and the mold body between the two outer mold frames is an inner mold body.

[0010] According to the above technical solution, the pressurizing device includes a pressurizing chamber and a deformation unit, the deformation unit is connected to the mold cavity, the pressurizing chamber is arranged on one side of the deformation unit, and the deformation unit is connected to a push-pull mechanism.

[0011] According to the above technical solution, the deformation unit includes a pressurizing plug and a pressurizing channel. One end of the pressurizing channel is connected to the mold cavity. The pressurizing plug is arranged in the pressurizing channel. The push-pull mechanism is connected to the pressurizing plug. The push-pull mechanism drives the pressurizing plug to move along the pressurizing channel.

[0012] According to the above technical solution, the push-pull mechanism includes an injection cylinder or a pressurizing cylinder;

[0013] When the push-pull mechanism includes an injection cylinder, the injection cylinder is connected to a pressurizing cover through a pipeline, and the pressurizing cover is arranged at the outer end of the pressurizing channel; the injection cylinder injects pressurized medium into the pressurizing channel through the pipeline and the pressurizing cover, so that the pressurizing plug moves along the pressurizing channel toward the mold cavity;

[0014] When the push-pull mechanism includes a pressurizing cylinder, a pressurizing chamber is provided on one side of the deformation unit, and the pressurizing chamber is filled with a pressurizing medium. The pressurizing cylinder is connected to the pressurizing plug through a pressurizing rod. Before pressurization, the pressurizing cylinder applies a pulling force to the pressurizing plug through the pressurizing rod, so that the pressurizing plug overcomes the pressure of the pressurizing medium and remains at the outermost end of the pressurizing channel. After concrete is poured in the mold cavity, the pressurizing cylinder is gradually released, so that the pressurizing plug moves toward the mold cavity under the pressure of the pressurized medium.

[0015] According to the above technical scheme, the deformation unit includes a pressure plate and a pressure cavity. The pressure cavity is arranged on one side of the mold cavity. The pressure plate is arranged between the pressure cavity and the mold cavity and serves as a part of the inner wall of one side of the mold cavity. The pressure cavity is filled with a pressurized medium. Before pressurization, the pressure plate is concavely deformed toward the pressure cavity side. The push-pull mechanism is connected to the pressure plate. During the process of pressurizing the mold cavity, the push-pull mechanism flattens the concave deformed part of the pressure plate.

[0016] According to the above technical solution, the push-pull mechanism includes a pressure cylinder or an electromagnet. When the push-pull mechanism includes an electromagnet, a steel plate, an iron plate, a magnet or a magnetic material is embedded in the pressure plate.

[0017] A method for implementing the above-mentioned pre-pressed vertical group production shield segment mold comprises the following steps:

[0018] 1) Assemble the moving mechanism with each mold body, and use the moving mechanism to move each mold body to the corresponding position for preliminary positioning;

[0019] 2) The mold bodies are preliminarily fitted together through the moving mechanism, and the segment reinforcement cage is placed in the mold cavity between the mold bodies;

[0020] 3) Assemble the clamping and opening and closing mechanism with each mold body, and use the clamping and opening and closing mechanism to tightly fit and clamp each mold body to form a whole;

[0021] 4) Pour concrete into the mold cavity between adjacent mold bodies and install a cover plate on the top of the mold cavity to seal it;

[0022] 5) Pressurize the concrete in the mold cavity through the pressure device and maintain a constant pressure until the concrete is finally set;

[0023] 6) Removing the pressure applied to the concrete in the mold cavity by the pressure device and steam curing the concrete;

[0024] 7) When the concrete reaches the specified strength to form the pipe segment, adjust the clamping opening and closing mechanism to separate the mold bodies and demold the pipe segment.

[0025] The present invention has the following beneficial effects:

[0026] A plurality of mold bodies are combined into a segment mold to realize the simultaneous production of multiple segments and improve production efficiency. After the concrete is poured and vibrated, a certain pre-pressure is applied and maintained until the concrete reaches a certain strength after final setting, and then the pressure is released. Steam curing can be carried out simultaneously to improve the mechanical properties, impermeability and durability of the concrete through pre-pressure. Firstly, the design of the vertical combined steel mold avoids the shortcomings of the traditional horizontal single-piece mold, such as large footprint and low production efficiency. Secondly, during the production process, measures such as pressurizing and maintaining the pressure on the segment concrete are taken simultaneously to improve the mechanical properties and durability of the concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a pre-pressed vertical group production shield segment mold in a closed and pre-tightened state according to an embodiment of the present invention;

[0028] Figure 2 It is a structural schematic diagram of a pre-pressed vertical group production shield segment mold in a dispersed state in an embodiment of the present invention;

[0029] Figure 3 is a schematic structural diagram of a pressurizing device before pressurization in Embodiment 1 of the present invention;

[0030] Figure 4 is a schematic structural diagram of the pressurizing device after pressurization in Embodiment 1 of the present invention;

[0031] Figure 5 is a schematic structural diagram of a pressurizing device before pressurization in scheme A of embodiment 2 of the present invention;

[0032] Figure 6 is a schematic structural diagram of the pressurizing device after pressurization of solution A in embodiment 2 of the present invention;

[0033] Figure 7 is a schematic structural diagram of a pressurizing device before pressurization in scheme B of embodiment 2 of the present invention;

[0034] Figure 8 is a schematic structural diagram of the pressurizing device after pressurization of solution B in embodiment 2 of the present invention;

[0035] Fig. 9 It is a schematic structural diagram of the pressurizing device before pressurization of scheme C in embodiment 2 of the present invention;

[0036] Fig.10 is a schematic structural diagram of the pressurizing device after pressurization of scheme C in embodiment 2 of the present invention;

[0037] Fig.11 yes Fig.10 K local schematic diagram;

[0038] Fig.12 It is a schematic diagram of a pressurizing device before pouring concrete in Embodiment 3 of the present invention;

[0039] Fig.13 is a schematic structural diagram of a pressurizing device after pouring concrete and before pressurizing in Embodiment 3 of the present invention;

[0040] Fig.14 is a schematic structural diagram of the pressurizing device after pressurization in Embodiment 3 of the present invention;

[0041] In the figure, 1-cover plate, 2-outer mold frame, 3-tension cylinder, 4-moving mechanism, 5-track, 6-inner mold body, 7-pull rod, 8-hydraulic pump station, 9-segment, 11-concrete, 12-pressure plug, 14-pressurized medium, 15-mold cavity, 16-wire rope, 17-pressure rod, 18-concrete storage tank, 19-pressurized channel, 20-sleeve, 21-fixed pulley, 22-pressurized cavity, 23-first connecting rod, 24-second connecting rod, 25-main connecting rod, 26-sealing ring, 27-electromagnet, 28-pressure plate, 29-injection cylinder. DETAILED DESCRIPTION

[0042] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0043] Reference Figure 1~Figure 2 As shown, a pre-stressed vertical group production shield segment mold in an embodiment provided by the present invention includes a clamping opening and closing mechanism and a plurality of mold bodies spliced ​​to each other, the plurality of mold bodies are arranged side by side in a straight line, a mold cavity 15 is provided between two adjacent inner mold bodies 6, the mold cavity 15 is used for pouring concrete, a moving mechanism 4 is provided on each mold body device, the clamping opening and closing mechanism is respectively connected to each mold body, the clamping opening and closing mechanism clamps each mold body toward the middle, and the mold cavity 15 is connected to a pressurizing device.

[0044] Furthermore, the mold cavity 15 includes two half-cavities, and the two half-cavities are respectively arranged in two adjacent mold bodies. When the two adjacent mold bodies are tightened and arranged side by side, the two half-cavities are spliced ​​into a complete mold cavity 15. The top and bottom of the mold cavity 15 are respectively provided with a cover plate 1 and a bottom plate, and the cover plate 1 and the bottom plate can be installed and spliced ​​later.

[0045] Furthermore, the moving mechanism 4 includes a track assembly, a reducer and an adjustable crank or motor. A roller is provided at the bottom of the mold body, and the mold body is set on the track assembly through the roller. The adjustable crank or motor is connected to the input end of the reducer, and the output end of the reducer is connected to the rotating shaft of the roller through a coupling. The adjustable crank or motor drives the roller to rotate through the reducer via the coupling, so that the mold body moves along the track assembly through the roller.

[0046] Furthermore, the motor is connected to a controller or a remote control handle.

[0047] Furthermore, the coupling is a cross universal coupling.

[0048] Furthermore, the rollers are divided into multiple groups, each roller.

[0049] Furthermore, the track assembly includes at least four tracks 5 arranged side by side, and at least four wheel sets are correspondingly arranged at the bottom of the mold, and each wheel set corresponds to one track 5.

[0050] Furthermore, the clamping opening and closing mechanism includes a pull rod 7 and a tensioning cylinder 3. The tensioning cylinder 3 is arranged on the outermost mold body on one side. One end of the pull rod 7 is connected to the tensioning cylinder 3. The other end of the pull rod 7 passes through the mold body in the middle part in turn and is connected to the outermost mold body on the other side.

[0051] Furthermore, flange sleeves are provided at both ends of the pull rod 7, and the two ends of the pull rod 7 are respectively connected to the tensioning cylinder 3 and the mold body through the flange sleeves.

[0052] Furthermore, the flange sleeve is connected to the outermost mold body on the corresponding side by bolts.

[0053] Furthermore, the tensioning cylinder 3 is a hydraulic cylinder, a pneumatic cylinder or an electric cylinder.

[0054] Furthermore, when the tensioning cylinder 3 is a hydraulic cylinder, the hydraulic cylinder is connected to a hydraulic system, the hydraulic system provides oil to the hydraulic cylinder, and the hydraulic system includes a hydraulic pump station 8 .

[0055] Furthermore, there are multiple pull rods 7, which are divided into two groups and distributed on both sides of the mold body.

[0056] Furthermore, each group of pull rods 7 is distributed in parallel in sequence from top to bottom.

[0057] Furthermore, a cover plate 1 is provided at the upper end of the mold cavity 15, and a bottom plate is provided at the bottom of the mold cavity 15. The cover plate 1 and the bottom plate are both connected to two adjacent mold bodies. A locking mechanism is connected between the cover plate 1 and the adjacent mold bodies, and the locking mechanism is used for quick locking and installation between the cover plate 1 and the mold body.

[0058] A vibrator is provided on the mold body; the vibrator is used to vibrate concrete, the mold bodies at the outermost ends of both sides are outer mold frames 2, and the mold body between the two outer mold frames 2 is an inner mold body 6.

[0059] Furthermore, the pressurizing device includes a pressurizing chamber 22 and a deformation unit, the deformation unit is communicated with the mold cavity 15, the pressurizing chamber 22 is arranged on one side of the deformation unit, and the deformation unit is connected with a push-pull mechanism.

[0060] Furthermore, the deformation unit includes a pressurizing plug 12 and a pressurizing channel 19 , one end of the pressurizing channel 19 is connected to the mold cavity 15 , the pressurizing plug 12 is arranged in the pressurizing channel 19 , and the push-pull mechanism is connected to the pressurizing plug 12 , and the push-pull mechanism drives the pressurizing plug 12 to move along the pressurizing channel 19 .

[0061] Further, the push-pull mechanism includes an injection cylinder 29 or a pressurizing cylinder;

[0062] When the push-pull mechanism includes an injection cylinder 29, the injection cylinder 29 is connected to a pressurizing cover through a pipeline, and the pressurizing cover is arranged at the outer end of the pressurizing channel 19; the injection cylinder 29 injects the pressurizing medium 14 into the pressurizing channel 19 through the pipeline and the pressurizing cover, so that the pressurizing plug 12 moves along the pressurizing channel 19 toward the mold cavity 15;

[0063] When the push-pull mechanism includes a pressurizing cylinder, a pressurizing chamber 22 is provided on one side of the deformation unit, and the pressurizing chamber 22 is filled with a pressurizing medium 14. The pressurizing cylinder is connected to the pressurizing plug 12 through a pressurizing rod 17; before pressurization, the pressurizing cylinder applies a pulling force to the pressurizing plug 12 through the pressurizing rod 17, so that the pressurizing plug 12 overcomes the pressure of the pressurized medium 14 and remains at the outermost end of the pressurizing channel 19. After concrete is poured in the mold cavity 15, the pressurizing cylinder is gradually released, so that the pressurizing plug 12 moves toward the mold cavity 15 under the pressure of the pressurized medium 14.

[0064] Furthermore, the pressurizing cylinder is an electric cylinder, a hydraulic cylinder or a pneumatic cylinder.

[0065] Furthermore, a steel wire rope 16 or a connecting rod mechanism is connected between the pressurizing rod 17 and the pressurizing plug 12 .

[0066] Furthermore, the pressurized medium 14 is gas or liquid.

[0067] Furthermore, the pressurizing chamber 22 is connected to a pressurizing pump, and the pressurizing pump is used to inject a pressurizing medium into the pressurizing chamber 22 .

[0068] Furthermore, the deformation unit includes a pressure plate 28 and a pressure cavity 22. The pressure cavity 22 is arranged on one side of the mold cavity 15. The pressure plate 28 is arranged between the pressure cavity 22 and the mold cavity 15 and serves as a part of the inner wall of one side of the mold cavity 15. The pressure cavity 22 is filled with a pressurized medium 14. Before pressurization, the pressure plate 28 is concavely deformed toward the pressure cavity 22 side. The push-pull mechanism is connected to the pressure plate 28. During the process of pressurizing the mold cavity 15, the push-pull mechanism flattens the concave deformed part of the pressure plate 28.

[0069] Furthermore, the push-pull mechanism includes a pressure cylinder or an electromagnet 27 . When the push-pull mechanism includes the electromagnet 27 , the pressure plate 28 is embedded with a steel plate, an iron plate, a magnet or a magnetic material.

[0070] Furthermore, the pressurizing cylinder is an electric cylinder, a hydraulic cylinder or a pneumatic cylinder.

[0071] Furthermore, the pressurized medium 14 is gas or liquid.

[0072] Furthermore, the pressurizing chamber 22 is connected to a pressurizing pump, and the pressurizing pump is used to inject a pressurizing medium into the pressurizing chamber 22 .

[0073] A method for implementing the above-mentioned pre-pressed vertical group production shield segment mold comprises the following steps:

[0074] 1) Assemble the moving mechanism 4 with each mold body, and move each mold body to a corresponding position by the moving mechanism 4 for preliminary positioning;

[0075] 2) Preliminary bonding of the mold bodies is performed through the moving mechanism 4, and the segment reinforcement cage is placed in the mold cavity 15 between the mold bodies;

[0076] 3) Assemble the clamping and opening and closing mechanism with each mold body, and use the clamping and opening and closing mechanism to tightly fit and clamp each mold body to form a whole;

[0077] 4) Pour concrete into the mold cavity 15 between each adjacent mold body, and install a cover plate 1 on the top of the mold cavity 15 to seal it;

[0078] 5) Pressurizing the concrete in the mold cavity 15 by means of a pressurizing device and maintaining a constant pressure until the concrete is finally set;

[0079] 6) Removing the pressure applied to the concrete in the mold cavity 15 by the pressure device, and steam-curing the concrete;

[0080] 7) When the concrete reaches the specified strength to form the pipe segment, adjust the clamping opening and closing mechanism to separate the mold bodies and demold the pipe segment.

[0081] Furthermore, the specified strength in step 7) means that the concrete reaches 30% or more of the concrete design strength.

[0082] Furthermore, in the step 2), when the segment reinforcement cage is placed into the mold cavity 15 , bent pipe bolts and lifting hole bolts are also installed in each mold cavity 15 .

[0083] Furthermore, in the step 4), after pouring concrete into the mold cavity 15, the concrete is initially vibrated by a wall-attached vibrator.

[0084] Furthermore, in the step 5), the pressure applied to the concrete in the mold cavity 15 is 0-5 MPa.

[0085] Furthermore, in the step 5), the pressure is released only after the constant pressure is maintained until the concrete is finally set and the concrete strength is ensured to be greater than the pressurized pressure.

[0086] Furthermore, in the step 7), during the demoulding process of the pipe segment, the auxiliary demoulding tightening mechanism and the wall-attached vibrator can be used to cooperate with the concrete pipe segment to demould.

[0087] Furthermore, after step 7), the pipe segments are transported to the next production link, the mold is cleaned, and the mold repeats the above steps to produce the next batch of pipe segments.

[0088] The pre-stressed vertical group production shield segment mold and its implementation method, the concrete segments are uniformly produced in the workshop through an automated production line, the production line consists of a plurality of mutually spliced ​​mold bodies, walking tracks 5, mobile hoists, concrete supply equipment, maintenance equipment, steel bar mold platforms, etc., each set of segment steel molds is a production station for a group or a ring of shield segments; the concrete segments are produced in groups and rings using vertical combined steel molds formed by mutual splicing; the steel bar mold platform is responsible for the processing and production of the segment concrete steel bars, and after the steel bars are processed and produced, the mobile hoist performs the mold entry operation; the concrete supply equipment is responsible for the segment concrete pouring, after the concrete pouring is completed, the attached vibrator distributed on each segment mold performs auxiliary vibration before pressurization, the concrete is pressurized by the combined steel mold pressurization system, after maintaining the pressure for a certain period of time, the concrete segment is cured by overall steaming or preheating the steel mold by the maintenance equipment, and the segment is hoisted by the mobile hoist; then water curing and natural curing are performed to complete the production task of a group or a ring of segments.

[0089] The pre-stressed vertical group production shield segment mold is composed of an inner mold body 6, an outer mold frame 2, a bottom plate and a cover plate 1. The inner mold body 6 and the outer mold frame 2 are tightly fitted together through the high-strength tie rod 7 and the jack to form a whole. The inner mold body 6, the outer mold frame 2 and the bottom plate and the cover plate 1 work together to form 4-6 cavities according to the specifications of the segment and the number of full ring segments. The inner mold body 6 and the outer mold frame 2 are provided with a track 5 and a moving mechanism 4 at the bottom. In the non-locked state, the inner mold body 6 and the outer mold frame 2 can be moved left and right on the track 5 through the moving mechanism 4. The cover plate 1 and the inner mold body 6 are provided with pressurizing holes as required, and the pressurizing holes are connected to the pressurizing device. The cover plate 1 is tightly fitted with the inner mold body 6 and the outer mold frame 2 through the locking mechanism. A clamping opening and closing mechanism is provided on the single-piece mold as required, and the concrete in the single-piece mold or the full-ring mold is pressurized through the clamping opening and closing mechanism to realize the pre-stressed vertical group production of the segment.

[0090] The pressurizing device can be a jack, or a liquid or gas, with a pressurization value of 0-5Mpa. The concrete in a single-piece mold or a full-ring mold can also be pressurized by a clamping opening and closing mechanism.

[0091] The concrete pressurization starts from the initial setting, with a pressure value of 0~5Mpa, and the pressure is maintained until the final setting of the concrete. After the concrete segment is pre-pressed, the 7-day compressive strength can be increased by 10%~50%, and the anti-permeability performance can be increased by 10%~50%.

[0092] The segments are produced in groups or rings, which reduces site occupation, improves production efficiency, and ensures the continuity and stability of the performance of a group or a ring of segments.

[0093] The pipe segments are produced vertically, which reduces turning over and tipping over during lifting, improves production efficiency, and reduces quality defects caused by turning over during lifting.

[0094] The segment curing method can be performed by using curing equipment to perform traditional integral steam curing or preheating steel molds to perform concrete temperature curing.

[0095] The shield segment adopts a standing composite steel mold, which consists of multiple reasonably arranged segment molds, attached vibrators, a pressurization system, a support system, and a steam curing hood. After the concrete is poured, it is vibrated by the attached vibrators distributed on each segment mold, and the concrete is pressurized by the hydraulic system of the composite steel mold. After maintaining the pressure for a certain period of time, the steam curing hood is covered and steam is passed through for steam curing. Then water curing and natural curing are carried out.

[0096] Furthermore, the standing combined steel mold has a variety of arrangement combinations, including but not limited to a 6-piece circular arrangement, a 6-piece elliptical arrangement, a 12-piece circular arrangement, etc.

[0097] The concrete is pressurized from the initial setting, with a pressure value of 1-5 MPa, and the pressure is maintained until the final setting of the concrete. After pre-pressing, the compressive strength of the concrete can be increased by 30%-70% in 7 days.

[0098] The steam curing hood can be made of a variety of materials, including but not limited to steel, plastic, thermal insulation materials, etc.

[0099] In the first specific embodiment of the present invention, Figure 3~Figure 4 As shown, the pressurizing device includes an injection cylinder 29, a pressurizing plug 12 and a pressurizing channel 19. One end of the pressurizing channel 19 is connected to the mold cavity 15, and the other end of the pressurizing channel 19 is connected to the injection cylinder 29. The pressurizing plug 12 is arranged in the pressurizing channel 19. The injection cylinder 29 fills the pressurizing medium 14 into the pressurizing channel 19, and pushes the pressurizing plug 12 along the pressurizing channel 19 toward the mold cavity 15, so that the concrete originally in the pressurizing channel 19 is squeezed into the mold cavity 15 through the pressurizing plug 12, so that the volume of the concrete becomes smaller, and the concrete in the mold cavity 15 is pressurized.

[0100] Furthermore, the pressurized plug 12 is a rubber plug, and the pressurized medium 14 can be a gas or a liquid, the gas can be air, and the liquid can be a pipe lubricant.

[0101] The specific process is as follows: first, pour concrete into the mold cavity 15 so that the concrete fills the mold cavity 15 and the pressure channel 19; then, place the pressure plug 12 into the pressure channel 19; and place a pressure cover on the pressure channel 19; the pressure cover wraps the pressure plug 12; the pressure cover is connected to the injection cylinder 29 through a pipeline; the injection cylinder 29 injects the pressurized medium 14 into the pressure channel 19 through the pressure cover, pressurizes it to 2MPa, and pushes the pressure plug 12 along the pressure channel 19 toward the mold cavity 15; the concrete in the pressure channel 19 is squeezed into the mold cavity 15; the outer side of the pressure plug 12 is flush with the inner wall of the mold cavity 15; the pressurization of the concrete in the mold cavity 15 is completed; the concrete in the mold cavity 15 is kept under pressure; steam-cured until the concrete solidifies; finally, the pipe lubricant is extracted, the mold is demolded, the rubber plug is taken out, and the pipe wall is cleaned.

[0102] In the specific embodiment 2 of the present invention, in scheme A, Figure 5~Figure 6 As shown, the pressurizing device includes a pressurizing rod 17, a pressurizing plug 12 and a pressurizing cavity 22. A pressurizing channel 19 is connected between the pressurizing cavity 22 and the mold cavity 15. The pressurizing plug 12 is arranged in the pressurizing channel 19. The pressurizing rod 17 passes through the pressurizing cavity 22 and is connected to the pressurizing plug 12. The pressurizing cavity 22 is filled with a pressurized medium 14. After the pressurizing rod 17 is pressed into the pressurizing cavity 22, the volume of the pressurized medium 14 is occupied, and the pressurizing plug 12 is squeezed to move the pressurizing plug 12 along the pressurizing channel 19 toward the mold cavity 15, and the concrete originally in the pressurizing channel 19 is squeezed into the mold cavity 15 through the pressurizing plug 12, so that the volume of the concrete becomes smaller, and the concrete in the mold cavity 15 is pressurized.

[0103] Furthermore, a steel wire rope 16 is connected between the pressurizing rod 17 and the pressurizing plug 12 , a fixed pulley 21 is provided on the inner wall of the pressurizing chamber 22 , one end of the steel wire rope 16 is connected to the pressurizing rod 17 , and the other end of the steel wire rope 16 passes around the fixed pulley 21 and is connected to the pressurizing plug 12 .

[0104] Furthermore, the pressurized medium 14 may be gas or liquid, and the gas may be air.

[0105] Specific working process: the pressure plug 12 is placed at the outermost side of the pressure channel 19, and the pressure medium 14 is injected into the pressure chamber 22. The pressure rod 17 pulls the pressure plug 12 through the wire rope 16. The pressure rod 17 is connected to the pressure cylinder to keep the pressure rod 17 in place to prevent the pressure plug 12 from moving toward the mold cavity 15, and then pour concrete into the mold cavity 15. The pressure of the pressure medium 14 in the pressure chamber 22 is greater than the pressure of the concrete in the mold cavity 15, but the pressure rod 17 still keeps the pressure plug 12 in place in the pressure channel 19 through the wire rope 16. The pressure rod 17 moves downward, and the pressure plug 12 moves toward the mold cavity 15 under the pressure of the pressure medium 14, and finally moves to be flush with the inner wall of the mold cavity 15, and the concrete originally in the pressure channel 19 is squeezed into the mold cavity 15 through the pressure plug 12, so that the volume of the concrete becomes smaller, and the concrete in the mold cavity 15 is pressurized.

[0106] In the specific embodiment 2 of the present invention, in scheme B, Figure 7~Figure 8 As shown, the pressurizing device includes a pressurizing rod 17, a pressurizing plug 12 and a pressurizing cavity 22. A pressurizing channel 19 is connected between the pressurizing cavity 22 and the mold cavity 15. The pressurizing plug 12 is arranged in the pressurizing channel 19. The pressurizing rod 17 passes through the pressurizing cavity 22 and is connected to the pressurizing plug 12. The pressurizing cavity 22 is filled with a pressurized medium 14. After the pressurizing rod 17 is pressed into the pressurizing cavity 22, the volume of the pressurized medium 14 is occupied, and the pressurizing plug 12 is squeezed to move the pressurizing plug 12 along the pressurizing channel 19 toward the mold cavity 15, and the concrete originally in the pressurizing channel 19 is squeezed into the mold cavity 15 through the pressurizing plug 12, so that the volume of the concrete becomes smaller, and the concrete in the mold cavity 15 is pressurized.

[0107] Furthermore, a connecting rod mechanism is connected between the pressure rod 17 and the pressure plug 12, and the connecting rod mechanism includes a main connecting rod 25, a first connecting rod 23 and a second connecting rod 24. The lower end of the pressure rod 17 is hinged to the upper end of the main connecting rod 25, and the lower end of the main connecting rod 25 is hinged to one end of the first connecting rod 23 and one end of the second connecting rod 24 respectively. The other end of the first connecting rod 23 is hinged to the pressure plug 12, and the other end of the second connecting rod 24 is hinged to the inner wall of the pressure chamber 22.

[0108] Furthermore, the pressurized medium 14 may be gas or liquid, and the gas may be air.

[0109] Specific working process: the pressure plug 12 is placed at the outermost side of the pressure channel 19, and the pressure medium 14 is injected into the pressure chamber 22. The pressure rod 17 pulls the pressure plug 12 through the connecting rod mechanism. The pressure rod 17 is connected to the pressure cylinder to keep the pressure rod 17 in position to prevent the pressure plug 12 from moving toward the mold cavity 15, and then pour concrete into the mold cavity 15. The pressure of the pressure medium 14 in the pressure chamber 22 is greater than the pressure of the concrete in the mold cavity 15, but the pressure rod 17 still keeps the pressure plug 12 in the original position of the pressure channel 19 through the connecting rod mechanism. The pressure rod 17 moves downward, and the pressure plug 12 moves toward the mold cavity 15 under the pressure of the pressure medium 14 until it moves flush with the inner wall of the mold cavity 15, and the concrete originally in the pressure channel 19 is squeezed into the mold cavity 15 through the pressure plug 12, so that the volume of the concrete becomes smaller and the concrete in the mold cavity 15 is pressurized.

[0110] In the specific embodiment 2 of the present invention, in scheme C, Figure 9~Figure 11 As shown, the pressurizing device includes a pressurizing rod 17, a pressurizing plug 12 and a pressurizing cavity 22. A pressurizing channel 19 is connected between the pressurizing cavity 22 and the mold cavity 15. The pressurizing plug 12 is arranged in the pressurizing channel 19. The pressurizing rod 17 passes through the pressurizing cavity 22 and is connected to the pressurizing plug 12. The pressurizing cavity 22 is filled with a pressurized medium 14. After the pressurizing rod 17 is pressed into the pressurizing cavity 22, the volume of the pressurized medium 14 is occupied, and the pressurizing plug 12 is squeezed to move the pressurizing plug 12 along the pressurizing channel 19 toward the mold cavity 15, and the concrete originally in the pressurizing channel 19 is squeezed into the mold cavity 15 through the pressurizing plug 12, so that the volume of the concrete becomes smaller, and the concrete in the mold cavity 15 is pressurized.

[0111] Furthermore, a steel wire rope 16 is connected between the pressurizing rod 17 and the pressurizing plug 12 , a fixed pulley 21 is provided on the inner wall of the pressurizing chamber 22 , one end of the steel wire rope 16 is connected to the pressurizing rod 17 , and the other end of the steel wire rope 16 passes around the fixed pulley 21 and is connected to the pressurizing plug 12 .

[0112] Furthermore, the pressurized medium 14 may be gas or liquid, and the gas may be air.

[0113] Furthermore, a sleeve 20 is provided inside the pressurized channel 19, and the pressurized plug 12 is in contact with the pressurized channel 19 through the sleeve 20. The sleeve 20 is easy to replace to avoid the entire equipment being scrapped due to wear of the pressurized channel 19; the outer ring of the pressurized plug 12 is provided with 2-3 sealing rings 26 in sequence, and the outer ring of the pressurized plug 12 and / or the sealing ring 26 are provided with a concrete storage groove 18 for cleaning the concrete remaining on the pressurized channel 19.

[0114] Specific working process: the pressure plug 12 is placed at the outermost side of the pressure channel 19, and the pressure medium 14 is injected into the pressure chamber 22. The pressure rod 17 pulls the pressure plug 12 through the wire rope 16. The pressure rod 17 is connected to the pressure cylinder to keep the pressure rod 17 in place to prevent the pressure plug 12 from moving toward the mold cavity 15, and then pour concrete into the mold cavity 15. The pressure of the pressure medium 14 in the pressure chamber 22 is greater than the pressure of the concrete in the mold cavity 15, but the pressure rod 17 still keeps the pressure plug 12 in place in the pressure channel 19 through the wire rope 16. The pressure rod 17 moves downward, and the pressure plug 12 moves toward the mold cavity 15 under the pressure of the pressure medium 14, and finally moves to be flush with the inner wall of the mold cavity 15, and the concrete originally in the pressure channel 19 is squeezed into the mold cavity 15 through the pressure plug 12, so that the volume of the concrete becomes smaller, and the concrete in the mold cavity 15 is pressurized.

[0115] In the specific embodiment 3 of the present invention, Figure 12~Figure 14 As shown, the pressurizing device includes a pressurizing chamber 22 and a pressurizing pump. The pressurizing chamber 22 is arranged on one side of the mold cavity 15. A pressurizing plate 28 is arranged between the pressurizing chamber 22 and the mold cavity 15. The pressurizing pump is connected to the pressurizing chamber 22 through a pipeline. Before pressurization, the pressurizing plate 28 is concave and deformed toward the pressurizing chamber 22 side. When the pressurizing pump injects the pressurizing medium 14 into the pressurizing chamber 22, the pressure in the pressurizing chamber 22 flattens the concave part of the pressurizing plate 28, and the volume of the mold cavity 15 becomes smaller, thereby pressurizing the material in the mold cavity 15.

[0116] Furthermore, the pressurizing device also includes an electromagnet 27, which is disposed in the pressurizing chamber 22 and arranged on one side of the pressurizing plate 28. When the electromagnet 27 is energized, suction is formed on the pressurizing plate 28, and the pressurizing plate 28 is pulled toward the pressurizing chamber 22 to form a depression. When the electromagnet 27 is de-energized, the depressed portion of the pressurizing plate 28 is flattened under the pressure of the pressurized medium 14 in the pressurizing chamber 22, and the concrete in the depressed portion is squeezed back into the mold cavity 15, and the volume of the mold cavity 15 becomes smaller to pressurize the concrete in the mold cavity 15.

[0117] Furthermore, the pressure plate 28 includes a rubber plate, in which a steel plate, an iron plate or a magnet is embedded, and the pressure plate 28 is composited. The electromagnet 27 generates suction force on the steel plate, the iron plate or the magnet embedded in the rubber plate, so that the pressure plate 28 forms a depression. The rubber plate has a certain flexibility, which facilitates the depression and deformation.

[0118] Furthermore, the pressurized medium 14 includes gas or liquid, and the gas may also be air.

[0119] Specific working process: before pouring concrete, the electromagnet 27 is energized to make the pressure plate 28 concave and deformed toward the pressure chamber 22 side, and then concrete is poured into the mold cavity 15. The electromagnet 27 is powered off and the pressure plate 28 is reset and flattened, squeezing the concrete in the concave part back into the mold cavity 15, reducing the volume of the concrete and pressurizing the concrete in the mold cavity 15.

[0120] In the fourth specific embodiment of the present invention, the pressurizing device includes a pressurizing chamber 22 and a pressurizing cylinder. The pressurizing chamber 22 is arranged on one side of the mold cavity 15. A pressurizing plate 28 is arranged between the pressurizing chamber 22 and the mold cavity 15. The pressurizing chamber 22 is filled with a pressurized medium 14. The pressurizing cylinder is arranged in the pressurizing chamber 22 and is connected to the pressurizing plate 28. Before pressurization, the pressurizing plate 28 is recessed toward the pressurizing chamber 22. When the pressurizing cylinder flattens the recessed part of the pressurizing plate 28, the volume of the mold cavity 15 becomes smaller, thereby pressurizing the material in the mold cavity 15.

[0121] Furthermore, the pressurized medium 14 includes gas or liquid, and the gas may also be air.

[0122] Furthermore, the pressurizing cylinder is a hydraulic cylinder, a pneumatic cylinder or an electric cylinder.

[0123] Specific working process: before pouring concrete, the pressure plate 28 is recessed toward the pressure chamber 22 side, and concrete is poured into the mold cavity 15. The pressure cylinder is lifted to reset the pressure plate 28 and flatten it, squeezing the concrete in the recessed part back into the mold cavity 15, reducing the volume of the concrete and pressurizing the concrete in the mold cavity 15.

[0124] The above are only preferred embodiments of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the protection scope of the present invention.

Claims

1. A pre-pressed vertical group production shield segment mold, characterized in that: It includes a clamping opening and closing mechanism and a plurality of mutually spliced ​​mold bodies, a mold cavity is provided between two adjacent inner mold bodies, the mold cavity is used for pouring concrete, a moving mechanism is provided on each mold body device, the clamping opening and closing mechanism is respectively connected to each mold body, the clamping opening and closing mechanism clamps each mold body toward the middle, and the mold cavity is connected to a pressurizing device; The pressurizing device includes a pressurizing cavity and a deformation unit, the deformation unit is connected to the mold cavity, the pressurizing cavity is arranged on one side of the deformation unit, and the deformation unit is connected to a push-pull mechanism; The deformation unit includes a pressure plate and a pressure cavity. The pressure cavity is arranged on one side of the mold cavity. The pressure plate is arranged between the pressure cavity and the mold cavity and serves as a part of the inner wall of one side of the mold cavity. The pressure cavity is filled with a pressurized medium. Before pressurization, the pressure plate is concavely deformed toward the pressure cavity side. The push-pull mechanism is connected to the pressure plate. During the process of pressurizing the mold cavity, the push-pull mechanism flattens the concave deformed part of the pressure plate. A cover plate is provided at the upper end of the mold cavity.

2. The pre-pressed vertical group production shield segment mold according to claim 1 is characterized in that: The moving mechanism includes a track assembly and a reducer. The moving mechanism also includes an adjustable crank or a motor. A roller is provided at the bottom of the mold body. The mold body is set on the track assembly through the roller. The adjustable crank or the motor is connected to the input end of the reducer. The output end of the reducer is connected to the rotating shaft of the roller through a coupling. The adjustable crank or the motor drives the roller to rotate through the reducer via the coupling, so that the mold body moves along the track assembly through the roller.

3. The pre-pressed vertical group production shield segment mold according to claim 1 is characterized in that: The clamping opening and closing mechanism includes a pull rod and a tensioning cylinder. The tensioning cylinder is arranged on the outermost mold body on one side. One end of the pull rod is connected to the tensioning cylinder, and the other end of the pull rod passes through the mold body in the middle part in turn and is connected to the outermost mold body on the other side.

4. The pre-pressed vertical group production shield segment mold according to claim 1 is characterized in that: A bottom plate is provided at the bottom of the mold cavity, and both the cover plate and the bottom plate are connected to two adjacent mold bodies; A vibrator is arranged on the mold body, the mold bodies at the outermost ends of the two sides are outer mold frames, and the mold body between the two outer mold frames is an inner mold body.

5. The pre-pressed vertical group production shield segment mold according to claim 1 is characterized in that: The push-pull mechanism includes a pressure cylinder or an electromagnet. When the push-pull mechanism includes an electromagnet, a steel plate, an iron plate or a magnetic material is embedded in the pressure plate.

6. A method for implementing the pre-pressed vertical group production of shield segment molds according to claim 1, characterized in that: The following steps are involved: 1) Assemble the moving mechanism with each mold body, and use the moving mechanism to move each mold body to the corresponding position for preliminary positioning; 2) The mold bodies are preliminarily fitted together through the moving mechanism, and the segment reinforcement cage is placed in the mold cavity between the mold bodies; 3) Assemble the clamping and opening and closing mechanism with each mold body, and use the clamping and opening and closing mechanism to tightly fit and clamp each mold body to form a whole; 4) Pour concrete into the mold cavity between adjacent mold bodies and install a cover plate on the top of the mold cavity to seal it; 5) Pressurize the concrete in the mold cavity through the pressure device and maintain a constant pressure until the concrete is finally set; 6) Removing the pressure applied to the concrete in the mold cavity by the pressure device and steam curing the concrete; 7) When the concrete reaches the specified strength to form the pipe segment, adjust the clamping opening and closing mechanism to separate the mold bodies and demold the pipe segment.

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