Continuous beam demolding device and method

Abstract

The invention relates to the technical field of continuous beam construction, and discloses a continuous beam demolding device and method which are applied to a continuous beam formwork, the formwork is provided with a plurality of demolding holes, and the demolding device comprises an auxiliary demolding box, a demolding device and a demolding device, the blocking assembly is arranged in the auxiliary demolding box, and the blocking assembly can slide in the first direction so as to open or close the demolding hole; and the compressed air injection assembly communicates with the auxiliary demolding box, and the compressed air injection assembly is suitable for providing compressed air for the interior of the auxiliary demolding box when the demolding hole is opened. Compressed air is injected between the formwork and the concrete interface, an air film or air pressure difference is formed, the contact area and bonding force of the concrete and the formwork are reduced, and therefore the effect of assisting in demolding is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of continuous beam construction, and in particular to a continuous beam demoulding device and method. Background Art

[0002] In modern bridge engineering, continuous beams are widely used due to their good structural integrity and strong bearing capacity. However, after the continuous beam is poured, the adhesion between the concrete and the formwork often makes demoulding difficult, especially in curved sections or complex structural parts where local adhesion is prone to occur. Traditional demoulding processes mainly rely on manual knocking, prying or hydraulic jacking. Forced demoulding can easily cause concrete surface damage, pockmarks and even structural microcracks, seriously affecting construction quality and durability. Summary of the invention

[0003] The present invention aims to at least solve the technical problem in the prior art that continuous beams are difficult to demould after casting and construction, by injecting compressed air between the template and the concrete interface to form an air film or air pressure difference, thereby reducing the contact area and bonding force between the concrete and the template, thereby assisting demoulding.

[0004] On the one hand, the present invention provides a continuous beam demoulding device, which is applied to a continuous beam formwork, wherein the formwork is provided with a plurality of demoulding holes, and the demoulding device comprises: an auxiliary demoulding box, wherein the auxiliary demoulding box is arranged on the back side of the formwork and is aligned with the demoulding holes; a sealing assembly, wherein the sealing assembly is arranged in the auxiliary demoulding box, and the sealing assembly can slide along a first direction to open or close the demoulding holes; and a compressed air injection assembly, wherein the compressed air injection assembly is connected to the auxiliary demoulding box, and wherein the compressed air injection assembly is suitable for providing compressed air to the auxiliary demoulding box when the demoulding holes are opened.

[0005] In some embodiments, the demoulding device further includes: a driving component, wherein the driving component is connected to the blocking component and is used to drive the blocking component to open or close the demoulding hole.

[0006] In some embodiments, the sealing assembly includes: a sealing plug, which is slidably disposed in the auxiliary demolding box; and a movable rod, one end of which is fixed to a side of the sealing plug away from the demolding hole, and the other end of the movable rod is connected to the driving assembly.

[0007] In some embodiments, the driving assembly includes: a guide portion, wherein the guide portion is disposed on a side of the auxiliary demolding box away from the template, the guide portion can slide along a second direction, the second direction is perpendicular to the first direction, the guide portion is provided with a first guide groove, a second guide groove and a third guide groove arranged along the second direction, the distance between the first guide groove and the auxiliary demolding box is smaller than the distance between the third guide groove and the auxiliary demolding box, and the two ends of the second guide groove are respectively connected to the first guide groove and the second guide groove; a guide block, one side of the blocking assembly passes through the auxiliary demolding box and is provided with a guide block, the guide block can slide along the first guide groove, the second guide groove and the third guide groove, and when the guide block is located in the first guide groove, the blocking assembly closes the demolding hole, and when the guide block is located in the third guide groove, the blocking assembly opens the demolding hole.

[0008] In some embodiments, two adjacent driving assemblies arranged along the second direction are detachably connected via a connecting assembly.

[0009] In some embodiments, the connecting assembly includes: two connecting parts, and the guide parts of two adjacent driving assemblies are respectively detachably connected to the two connecting parts; a bidirectional lead screw, and both ends of the bidirectional lead screw are respectively threadedly connected to the two connecting parts, and the threads of the two connecting parts have opposite rotation directions.

[0010] In some embodiments, a plurality of supporting components are provided on the back side of the template, and the supporting components include: a column, which is located on the back side of the template; a telescopic cylinder, which is inclined toward the template, one end of the telescopic cylinder is hinged to the back side of the template, and the other end of the telescopic cylinder is hinged to the column.

[0011] In some embodiments, the blocking component is provided with a film layer, and the film layer is located on the casting surface of the template and blocks the demoulding hole.

[0012] In some embodiments, the compressed air injection assembly includes: an air pretreatment unit; a compressed air tank, one side of the compressed air tank is connected to the air pretreatment unit, and the other side of the compressed air tank is connected to the auxiliary demolding box through an air supply pipe, the air supply pipe is provided with a valve, and a pressure sensor is provided on the air supply pipe at the position of the auxiliary demolding box.

[0013] On the other hand, an embodiment of the present invention further provides a method for demoulding a continuous beam, using the continuous beam demoulding device described in any of the above embodiments, and the method comprises the following steps: S1, sliding the blocking component to a closed position so that one side of the blocking component is flush with the casting surface of the continuous beam template, and the demoulding hole is blocked; S2, pouring concrete into the template, and maintaining the sealing state of the blocking component to the demoulding hole during the pouring process, and after the pouring is completed, vibrating, plastering and curing the concrete in accordance with the specifications until the predetermined demoulding strength is reached; S3, controlling the The plugging component slides along a first direction to open the demoulding hole, and the compressed air injection component is started to inject low-pressure airflow into the auxiliary demoulding box to form an initial air film between the template and the concrete cross section, and then the air pressure is increased to output a high-frequency pulse airflow to break the local adhesion area; S4, under the continuous action of the air film, the template and the concrete surface are slowly separated in combination with a hydraulic pushing device; S5, after the template is completely separated from the concrete surface, the compressed air injection component is closed, the plugging component is reset to the closed position, and the demoulding hole and the residue in the auxiliary demoulding box are cleaned.

[0014] The technical solution provided in the present invention has at least the following technical effects or advantages: a plugging component is provided to seal the demoulding hole when pouring concrete into the template. After pouring, compressed air is injected between the template and the concrete interface through the compressed air injection component to form an air film or air pressure difference, thereby reducing the contact area and bonding force between the concrete and the template, thereby assisting demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the overall structure of the demoulding device in an embodiment of the present invention;

[0016] Figure 2 is a schematic diagram of some templates in an embodiment of the present invention; Figure 3 It is a schematic diagram of the back side of some templates in an embodiment of the present invention; Figure 4 is a schematic diagram of the connection between the driving component and the connecting component in an embodiment of the present invention; Figure 5 is a schematic diagram of the structure of a driving component in an embodiment of the present invention; Figure 6 for Figure 3 The enlarged schematic diagram of point A in the middle; In the figure: 100, template; 101, demoulding hole; 1, auxiliary demoulding box; 2, plugging assembly; 21, sealing plug; 22, movable rod; 23, film layer; 3, compressed air injection assembly; 31, cold dryer; 32, filter; 33, compressed air tank; 34, air supply pipe; 35, pressure sensor; 4, driving assembly; 41, guide part; 42, guide block; 421, guide wheel; 43, first guide groove; 44, second guide groove; 45 , the third guide groove; 46, the mounting seat; 47, the matching part; 5, the connecting assembly; 51, the connecting part; 52, the bidirectional screw; 6, the locking assembly; 61, the plug block; 62, the first slider; 621, the driving groove; 63, the second slider; 64, the sliding rod; 65, the first sliding groove; 66, the second sliding groove; 67, the third sliding groove; 68, the first spring; 69, the telescopic rod; 7, the supporting assembly; 71, the column; 72, the telescopic cylinder; 8, the vibration motor. DETAILED DESCRIPTION

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0018] A continuous beam demoulding device and method disclosed in the present invention will be described below in conjunction with the accompanying drawings.

[0019] On the one hand, referring to Figure 1-Figure 6 The present invention provides a continuous beam demoulding device, which is applied to a continuous beam template 100. The template 100 has a casting surface and a back surface. The template 100 is provided with a plurality of demoulding holes 101. The demoulding holes 101 penetrate the template 100 along a first direction. The demoulding holes 101 can be distributed along the plane array of the template 100. The demoulding device comprises: an auxiliary demoulding box 1, a plugging component 2, and a compressed air injection component 3. The auxiliary demoulding box 1 is arranged on the back of the template 100 and aligned with the demoulding holes 101. Specifically, one end of the auxiliary demoulding box 1 connected to the template 100 is an open structure, and the opening of the auxiliary demoulding box 1 is larger than the aperture of the demoulding hole 101. An auxiliary demoulding box 1 is correspondingly provided at each demoulding hole 101. The plugging component 2 is arranged in the auxiliary demoulding box 1, and the plugging component 2 can slide along the first direction to open or close the demoulding hole 101. The compressed air injection assembly 3 is connected to the auxiliary demoulding box 1 and is suitable for providing compressed air to the auxiliary demoulding box 1 when the demoulding hole 101 is opened. The first direction is the axial extension direction of the demoulding hole 101, that is, the thickness direction of the template 100.

[0020] After the concrete poured on the casting surface of the template 100 reaches the predetermined demoulding strength, the sealing component 2 is driven to slide along the first direction to open the demoulding hole 101, and the compressed air injection component 3 is started to inject compressed air into the auxiliary demoulding box 1, so that the compressed air enters the gap between the concrete and the casting surface of the template 100 through the demoulding hole 101, thereby reducing the contact area and bonding force between the concrete and the template 100, thereby assisting demoulding.

[0021] like Figure 2 In the figure, the template 100 includes a horizontally arranged plate body and a vertically arranged plate body, and demoulding holes 101 are arranged on both the horizontally arranged plate body and the vertically arranged plate body. At this time, the axial direction of the demoulding hole 101 located in the horizontally arranged plate body is the vertical direction, and its first direction is the vertical direction; the axial direction of the demoulding hole 101 located in the vertically arranged plate body is the horizontal direction, and its first direction is the horizontal direction.

[0022] Reference Figure 3 , Figure 4 According to some embodiments of the present invention, the demoulding device further includes: a driving component 4, which is connected to the blocking component 2 and is used to drive the blocking component 2 to open or close the demoulding hole 101. The driving component 4 is arranged on the back of the template 100 to facilitate driving the blocking component 2 to slide along the first direction, thereby opening or closing the demoulding hole 101.

[0023] Reference Figure 4 , Figure 5 According to some embodiments of the present invention, the plugging assembly 2 includes: a sealing plug 21 and a movable rod 22. The sealing plug 21 is slidably disposed in the auxiliary demoulding box 1. The circumferential surface of the sealing plug 21 is sealed with the inner circumferential wall of the demoulding box. One end of the movable rod 22 is fixed to the side of the sealing plug 21 away from the demoulding hole 101, and the other end of the movable rod 22 is connected to the driving assembly 4. A sealing ring is sleeved on the circumferential surface of the sealing plug 21, and a demoulding layer may be provided on the side of the sealing plug 21 facing the demoulding hole 101. The demoulding layer is made of a demoulding agent, which may be a special oily demoulding agent layer or a silicone resin demoulding agent layer. Furthermore, in order to improve the demoulding efficiency, a corresponding demoulding layer may also be provided on the casting surface of the template 100 to assist in demoulding.

[0024] Reference Figure 3-Figure 5According to some embodiments of the present invention, the driving assembly 4 includes: a guide portion 41 and a guide block 42. The guide portion 41 is arranged on the side of the auxiliary demoulding box 1 away from the template 100. The guide portion 41 can slide along the second direction, and the second direction is perpendicular to the first direction, that is, the second direction is a direction perpendicular to the axial extension direction of the demoulding hole 101. The guide portion 41 is provided with a first guide groove 43, a second guide groove 44 and a third guide groove 45 arranged along the second direction, that is, the first guide groove 43, the second guide groove 44 and the third guide groove 45 extend along the second direction and are connected in sequence. The spacing between the first guide groove 43 and the auxiliary demoulding box 1 is smaller than the spacing between the third guide groove 45 and the auxiliary demoulding box 1. The two ends of the second guide groove 44 are connected to the first guide groove 43 and the second guide groove 44 respectively. The second guide groove 44 is arranged obliquely, and a smooth arc transition is arranged at the connection between the second guide groove 44 and the first guide groove 43 and at the connection between the second guide groove 44 and the first guide groove 43. One side of the sealing component 2 passes through the auxiliary demolding box 1 and is provided with a guide block 42. The guide block 42 can slide along the first guide groove 43, the second guide groove 44 and the third guide groove 45. When the guide block 42 is located in the first guide groove 43, the sealing component 2 closes the demolding hole 101, and when the guide block 42 is located in the third guide groove 45, the sealing component 2 opens the demolding hole 101.

[0025] When the guide block 42 is located in the first guide groove 43, the first guide groove 43 is close to the auxiliary demoulding box 1, and the plugging assembly 2 can be inserted into the demoulding hole 101 to block the demoulding hole 101, and the side of the sealing plug 21 away from the movable rod 22 is flush with the casting surface of the template 100. If it is necessary to open the demoulding hole 101, the guide part 41 can be pushed along the second direction toward the second side of the auxiliary demoulding box 1 by the driving member or manually, so that the guide block 42 slides along the first guide groove 43 to the second guide groove 44, and the guide part 41 is continuously pushed, so that the guide block 42 moves from the second guide groove 44 to the third guide groove 45, thereby gradually increasing the distance between the guide block 42 and the end of the auxiliary demoulding box 1, and pulling the plugging assembly 2 connected to the guide block 42 to move in the direction away from the demoulding hole 101, thereby opening the demoulding hole 101.

[0026] The first guide groove 43 and the third guide groove 45 are both horizontal grooves extending along the second direction, the second guide groove 44 is an inclined groove, and the distance between the end of the second guide groove 44 connected to the first guide groove 43 and the template 100 is smaller than the distance between the end of the second guide groove 44 connected to the third guide groove 45 and the template 100.

[0027] In some examples, the guide portion 41 is a rectangular frame, and the guide portion 41 is composed of two long side surfaces and two short side surfaces, and the two ends of the long side surfaces are respectively connected vertically to the two short side surfaces, and each long side surface is provided with a first guide groove 43, a second guide groove 44, and a third guide groove 45, which are aligned with each other. Both ends of the guide block 42 are provided with guide wheels 421, and the two guide wheels 421 are respectively in rolling cooperation with the two long side surfaces to reduce the friction when the guide wheels 421 slide with the first guide groove 43, the second guide groove 44, and the third guide groove 45.

[0028] In another example, a mounting seat 46 is fixed on the template 100 , and the mounting seat 46 extends toward one end of the auxiliary demoulding box 1 away from the demoulding hole 101 , and the guide portion 41 is slidably engaged with a side of the mounting seat 46 away from the auxiliary demoulding box 1 .

[0029] Reference Figure 2 , Figure 3 According to some embodiments of the present invention, two adjacent driving assemblies 4 arranged along the second direction are detachably connected via a connecting assembly 5. The two adjacent driving assemblies 4 are connected via the connecting assembly 5, so that by driving one guide portion 41 to slide along the second direction, an adjacent driving assembly 4 can be driven to slide along the second direction synchronously, thereby improving the efficiency of opening or closing the demoulding hole 101.

[0030] Reference Figure 2 , Figure 3 According to some embodiments of the present invention, the connection assembly 5 includes: two connection parts 51, a bidirectional lead screw 52, ​​the guide parts 41 of two adjacent drive assemblies 4 are detachably connected to the two connection parts 51, and the two ends of the bidirectional lead screw 52 are respectively threadedly connected to the two connection parts 51, and the threads of the two connection parts 51 are opposite in direction. In this embodiment, the overall length of the connection assembly 5 can be adjusted according to the spacing between the two adjacent drive assemblies 4 to facilitate the cooperation with the guide part 41 of the drive assembly 4, and the guide part 41 and the connection part 51 can be snap-fitted, which is conducive to improving assembly efficiency.

[0031] Specifically, the two connecting parts 51 are sleeves arranged along the second direction, and the sleeves are provided with internal threads, which cooperate with the threads of the bidirectional screw. Exemplarily, a torsion block can be provided in the middle of the bidirectional screw 52, ​​and the bidirectional screw 52 can be rotated by rotating the torsion block. Since the bidirectional screw 52 is provided with two opposite threads, when the bidirectional screw 52 is rotated in the forward direction, the two connecting parts 51 can be brought closer to each other, thereby shortening the length of the entire connecting assembly 5; after the bidirectional screw 52 is rotated in the reverse direction, the two connecting parts 51 can be moved away from each other, thereby increasing the length of the entire connecting assembly 5. By providing such a connecting assembly 5, the length of the connecting assembly 5 can be adjusted according to actual needs, and then cooperate with two adjacent driving assemblies 4 to combine multiple driving assemblies 4 along the second direction, so that by pushing one driving assembly 4, multiple driving assemblies 4 can be synchronously driven to move along the second direction, thereby improving the efficiency of opening or closing the demoulding hole 101.

[0032] In some examples, both ends of the guide portion 41 are provided with a matching portion 47, and the matching portion 47 is connected to the connecting portion 51 through the lock assembly 6. Specifically, the lock assembly 6 includes: an insert block 61, a first slider 62, a second slider 63 and a slide bar 64, a through hole is provided on one side of the matching portion 47, an insert block 61 is provided on one side of the connecting portion 51, the insert block 61 is plugged and matched with the through hole, a first slide groove 65, a second slide groove 66 and a third slide groove 67 are provided on the slider, the first slide groove 65 extends along the second direction and penetrates the side wall of the insert block 61, the second slide groove 66 is connected to one side of the first slide groove 65 and is perpendicular to the extension direction of the first slide groove 65, the third slide groove 67 is provided along the extension direction of the second slide groove 66 and is connected to the second slide groove 66, and the other end of the third slide groove 67 penetrates the other side wall of the insert block 61. The first slider 62 is slidably connected in the first slide groove 65, and a first spring 68 is connected between one end of the first slider 62 and the groove wall of the first slide groove 65. The second slider 63 is slidably connected in the second slide groove 66. A slide rod 64 is slidably connected in the third slide groove 67, and the lower end of the slide rod 64 is fixed to the second slider 63. A driving groove 621 is provided on the side of the first slider 62 close to the second slide groove 66, and a first inclined surface is formed on the end of the first slider 62 away from the first spring 68, and the first inclined surface is inclined away from the second slider 63. A second inclined surface is formed on the end of the second slider 63 close to the first slider 62, and the second inclined surface is inclined toward the first spring 68, and a matching inclined surface is formed on the side of the driving groove 621 close to the first spring 68, and the matching inclined surface overlaps with the second inclined surface.

[0033] After adjusting the length of the connecting component 5, the plug blocks 61 on the two connecting parts 51 can be aligned with the matching parts 47 on the opposite side of the two adjacent driving components 4, and the plug blocks 61 are inserted into the through holes of the corresponding matching parts 47. Due to the setting of the first inclined surface, the hole wall of the through hole squeezes the first slider 62, so that the first slider 62 retracts into the first slide groove 65. After the plug block 61 is fully matched with the through hole, the first slider 62 extends out of the first slide groove 65 under the elastic force of the first spring 68 and abuts against the other side of the matching part 47, thereby forming a detachable fit between the connecting part 51 and the guide part 41, so that the connecting component 5 connects the two adjacent driving components 4.

[0034] By pressing the slide bar 64, the slide bar 64 drives the second slide block 63 to slide in the direction of the first slide block 62. Since the second inclined surface slides in cooperation with the mating inclined surface, the second slide block 63 drives the first slide block 62 to slide along the first slide groove 65 in the direction of the first spring 68, thereby allowing the first slide block 62 to retract into the first slide groove 65, making it easier to disconnect the insert block 61 from the mating portion 47.

[0035] Furthermore, a telescopic rod 69 is connected between the two sliding rods 64 , and by pressing the telescopic rod 69 , the cooperation between the two connecting parts 51 and the guiding parts 41 can be synchronously released.

[0036] Reference Figure 1-Figure 3 According to some embodiments of the present invention, a plurality of support components 7 are provided on the back of the template 100, and the support components 7 include: a column 71 and a telescopic cylinder 72. The column 71 is located on the back of the template 100, and the telescopic cylinder 72 is tilted toward the template 100. One end of the telescopic cylinder 72 is hinged to the back of the template 100, and the other end of the telescopic cylinder 72 is hinged to the column 71. When pouring concrete, the template 100 can be supported by the column 71 and the telescopic cylinder 72 to improve the strength of the template 100. When it is necessary to demold the concrete, the telescopic cylinder 72 can be driven to shrink a small stroke, thereby pulling the template 100 and the concrete cross section to generate an initial separation gap, which is convenient for injecting compressed air, and the synergistic effect improves the demolding efficiency.

[0037] Reference Figure 1-Figure 3 According to some embodiments of the present invention, multiple vibration motors 8 are evenly arranged on the back of the template 100. After starting, high-frequency micro-amplitude vibration (frequency 20-50Hz, amplitude 0.1-0.5mm) is used to separate the template 100 from the concrete interface and reduce demoulding resistance.

[0038] Reference Figure 3-Figure 5 According to some embodiments of the present invention, the blocking component 2 is provided with a film layer 23 , and the film layer 23 is located on the casting surface of the template 100 and blocks the demoulding hole 101 .

[0039] Exemplarily, the film layer 23 is connected to the side of the sealing plug 21 facing the demolding hole 101, and the edge of the film layer 23 extends outward, so that the area of ​​the film layer 23 is slightly larger than the area of ​​the sealing plug 21, and can cover the demolding hole 101. Since the film layer 23 is relatively thin, when the plugging component 2 slides along the first direction away from the demolding hole 101, the film layer 23 can be pulled to produce a slight deformation and shrink into the auxiliary demolding box 1. The film layer 23 can also be made of a resin release agent.

[0040] Reference Figure 1 According to some embodiments of the present invention, the compressed air injection assembly 3 includes: an air pretreatment unit; a compressed air tank 33, one side of the compressed air tank 33 is connected to the air pretreatment unit, and the other side of the compressed air tank 33 is connected to the auxiliary demolding box 1 through an air supply pipe 34, the air supply pipe 34 is provided with a valve, and the air supply pipe 34 is provided with a pressure sensor 35 at the position of the auxiliary demolding box 1.

[0041] In some examples, the air pretreatment unit is composed of a cold dryer 31 and a filter 32 which are detachably connected in sequence. The inlet end of the cold dryer 31 can be connected to an external air compressor. The air pretreatment unit can remove moisture from the air, and the filter 32 is used to filter impurities. The compressed air tank 33 stores compressed air.

[0042] In some other examples, a plurality of clamps are detachably mounted on the back of the template 100, and the air supply pipe 34 includes an output pipe, a plurality of main pipes, and a plurality of connecting pipes. The main pipe extends along the second direction of the template 100, and the plurality of main pipes are arranged at intervals along the third direction. The second direction is the extension direction of the template 100, and the third direction is perpendicular to the first direction and the second direction. The air outlet of the compressed air tank 33 is connected to the output pipe, and the output pipe is connected to a plurality of main pipes. Each main pipe is fixed to the template 100 through a clamp, and the side wall of each auxiliary demoulding box 1 is connected to the adjacent main pipe through a connecting pipe. A valve is provided on the output pipe, and a valve is also provided on each main pipe.

[0043] If Figure 2 The vertically arranged plate is used as a reference, that is, the first direction is the X direction in FIG. 2, and the second direction is Figure 2 The Z direction in the middle, the third direction is Figure 3 in the Y direction.

[0044] Furthermore, the auxiliary demoulding box 1 extends along the first direction, and the connecting pipe is connected to the middle position of the auxiliary demoulding box 1. When the plugging assembly 2 closes the demoulding hole 101, the connecting pipe is located on the side where the sealing plug 21 is connected to the movable rod 22; when the plugging assembly 2 opens the demoulding hole 101, the sealing plug 21 is close to the end of the auxiliary demoulding box 1 away from the demoulding hole 101, and the side of the sealing plug 21 away from the movable rod 22 forms a compressed air injection cavity with the side wall of the auxiliary demoulding box 1, and the connecting pipe is connected to the compressed air injection cavity. The pressure sensor 35 is arranged at a position where the connecting pipe is close to the auxiliary demoulding box 1. During demoulding, compressed air is injected into the gap between the template 100 and the concrete interface, the pressure will be released, and the air film diffusion is normal; if the pressure of the pressure sensor 35 drops, no intervention is required to maintain the current air pressure supply. If the pressure at the connecting pipe of an auxiliary demoulding box 1 does not change or increases abnormally, it means that there may be serious adhesion between the template 100 and the concrete interface at that location, making demoulding difficult. In this case, it is necessary to adopt other means or manually intervene in demoulding, or suspend demoulding, turn off the compressed air injection component 3, and perform maintenance and other operations.

[0045] According to some embodiments of the present invention, the third guide groove 45 has a short extension groove at one end away from the second guide groove 44, and the distance between the end of the extension groove connected to the third guide groove 45 and the auxiliary demoulding box 1 is smaller than the other end of the extension groove, so that when the guide block 42 continues to slide along the third guide groove 45, it can drive the sealing plug 21 to extend out of the demoulding hole 101 and be higher than the casting surface of the template 100, thereby conveniently pushing out the residue in the auxiliary demoulding box 1. In addition, when demoulding is required, a smaller pressure can be applied to the concrete to facilitate auxiliary demoulding.

[0046] On the other hand, refer to Figure 1-Figure 6 An embodiment of the present invention further provides a method for demoulding a continuous beam, using the continuous beam demoulding device in any of the above embodiments, and the method includes the following steps.

[0047] S1. Blocking of demoulding hole 101 and installation of demoulding device 1.1. Slide the plugging assembly 2 to the closed position so that one side of the plugging assembly 2 is flush with the casting surface of the continuous beam template 100 and the demoulding hole 101 is blocked. After the sealing plug 21 is flush with the casting surface of the template 100, the film layer 23 can be bonded to the side of the sealing plug 21 facing the demoulding hole 101 so that the film layer 23 can completely seal the demoulding hole 101. In order to make the concrete casting surface flat, a groove can be formed on the casting surface of the template 100 and on the outside of the demoulding hole 101, and the film layer 23 is arranged in the groove and is flush with the casting surface of the template 100.

[0048] 1.2. Adjust the length of the connecting assembly 5 by rotating the bidirectional lead screw 52 so that the two connecting parts 51 of the connecting assembly 5 are aligned with the matching parts 47 of two adjacent driving assemblies 4. The connecting parts 51 are engaged with the corresponding matching parts 47.

[0049] S2, pouring concrete into the template 100, during the pouring process, the sealing component 2 is kept sealed to the demoulding hole 101, and the film layer 23 prevents the concrete slurry from penetrating into the demoulding hole 101; after the pouring is completed, the concrete is vibrated, plastered and cured according to the specifications until the predetermined demoulding strength is reached. During this period, the telescopic cylinder 72 maintains a constant supporting force.

[0050] S3, control the blocking component 2 to slide along the first direction to open the demoulding hole 101, start the compressed air injection component 3, inject low-pressure airflow into the auxiliary demoulding box 1, form an initial air film between the template 100 and the concrete cross section, and then increase the air pressure to output high-frequency pulse airflow to break the local adhesion area. At the same time, the telescopic cylinder 72 shrinks the stroke 5-10mm, applying tension to the template 100; the vibration motor 8 is started, causing the template 100 to vibrate slightly.

[0051] S4. Under the continuous action of the air film, the formwork 100 is slowly separated from the concrete surface in combination with a hydraulic jacking device.

[0052] S5. After the template 100 is completely separated from the concrete surface, close the compressed air injection assembly 3, release the residual air pressure in the pipeline, reset the plugging assembly 2 to the closed position, and clean the demoulding hole 101 and the residue in the auxiliary demoulding box 1. In addition, after the template 100 is completely separated from the concrete, the sealing plug 21 can be driven to move toward the demoulding hole 101 along the first direction to push out the residue in the auxiliary demoulding box 1. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

[0053] What has been described above are only preferred specific implementations of the embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes based on the technical solutions and concepts of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A continuous beam demoulding device, applied to a continuous beam template (100), characterized in that: The template (100) is provided with a plurality of demoulding holes (101), and the demoulding device comprises: An auxiliary demoulding box (1), the auxiliary demoulding box (1) being arranged on the back side of the template (100) and aligned with the demoulding hole (101); A blocking component (2), the blocking component (2) being arranged in the auxiliary demoulding box (1), and the blocking component (2) being able to slide along a first direction to open or close the demoulding hole (101); A compressed air injection assembly (3), the compressed air injection assembly (3) being in communication with the auxiliary demoulding box (1), the compressed air injection assembly (3) being suitable for providing compressed air into the auxiliary demoulding box (1) when the demoulding hole (101) is opened.

2. The continuous beam demoulding device according to claim 1, characterized in that: The demoulding device further comprises: a driving component (4), the driving component (4) being connected to the blocking component (2) and being used for driving the blocking component (2) to open or close the demoulding hole (101).

3. The continuous beam demoulding device according to claim 2, characterized in that: The blocking component (2) comprises: A sealing plug (21), the sealing plug (21) being slidably disposed in the auxiliary demoulding box (1); A movable rod (22), one end of the movable rod (22) being fixed to a side of the sealing plug (21) facing away from the demoulding hole (101), and the other end of the movable rod (22) being connected to the driving assembly (4).

4. The continuous beam demoulding device according to claim 2, characterized in that: The driving component (4) comprises: a guide portion (41), the guide portion (41) being arranged on a side of the auxiliary demoulding box (1) away from the template (100), the guide portion (41) being slidable along a second direction, the second direction being perpendicular to the first direction, the guide portion (41) being provided with a first guide groove (43), a second guide groove (44) and a third guide groove (45) arranged along the second direction, the spacing between the first guide groove (43) and the auxiliary demoulding box (1) being smaller than the spacing between the third guide groove (45) and the auxiliary demoulding box (1), and two ends of the second guide groove (44) being respectively connected to the first guide groove (43) and the second guide groove (44); A guide block (42), one side of the blocking component (2) passes through the auxiliary demoulding box (1) and is provided with a guide block (42), the guide block (42) can slide along the first guide groove (43), the second guide groove (44) and the third guide groove (45), and when the guide block (42) is located in the first guide groove (43), the blocking component (2) closes the demoulding hole (101), and when the guide block (42) is located in the third guide groove (45), the blocking component (2) opens the demoulding hole (101).

5. The continuous beam demoulding device according to claim 4, characterized in that: Two adjacent drive assemblies (4) arranged along the second direction are detachably connected via a connecting assembly (5).

6. The continuous beam demoulding device according to claim 5, characterized in that: The connection component (5) comprises: Two connecting parts (51), the guide parts (41) of two adjacent driving assemblies (4) being detachably connected to the two connecting parts (51) respectively; A bidirectional lead screw (52), wherein two ends of the bidirectional lead screw (52) are respectively threadedly connected to the two connecting portions (51), and the thread rotation directions of the two connecting portions (51) are opposite.

7. The continuous beam demoulding device according to claim 1, characterized in that: A plurality of support components (7) are arranged on the back of the template (100), and the support components (7) include: A column (71), the column (71) being located on the back side of the template (100); A telescopic cylinder (72), the telescopic cylinder (72) being arranged obliquely toward the template (100), one end of the telescopic cylinder (72) being hinged to the back side of the template (100), and the other end of the telescopic cylinder (72) being hinged to the column (71).

8. The continuous beam demoulding device according to claim 1, characterized in that: The blocking component (2) is provided with a film layer (23), and the film layer (23) is located on the casting surface of the template (100) and blocks the demoulding hole (101).

9. The continuous beam demoulding device according to claim 1, characterized in that: The compressed air injection assembly (3) comprises: Air pre-treatment unit; A compressed air tank (33), one side of the compressed air tank (33) is connected to the air pretreatment unit, and the other side of the compressed air tank (33) is connected to the auxiliary demoulding box (1) through an air supply pipe (34), the air supply pipe (34) is provided with a valve, and the air supply pipe (34) is provided with a pressure sensor (35) at a position located at the auxiliary demoulding box (1).

10. A method for demoulding a continuous beam, using the continuous beam demoulding device according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: S1, sliding the blocking component (2) to a closed position, so that one side of the blocking component (2) is flush with the casting surface of the continuous beam formwork (100), and the demoulding hole (101) is blocked; S2, pouring concrete into the template (100), maintaining the sealing state of the blocking component (2) on the demoulding hole (101) during the pouring process, and after the pouring is completed, vibrating, plastering and curing the concrete in accordance with the specification until a predetermined demoulding strength is reached; S3, controlling the blocking component (2) to slide along a first direction to open the demoulding hole (101), starting the compressed air injection component (3), injecting low-pressure airflow into the auxiliary demoulding box (1), forming an initial air film between the template (100) and the concrete cross section, and then increasing the air pressure to output high-frequency pulse airflow to break the local adhesion area; S4, under the continuous action of the air film, the formwork (100) is slowly separated from the concrete surface in combination with a hydraulic jacking device; S5. After the template (100) is completely separated from the concrete surface, the compressed air injection component (3) is closed, the blocking component (2) is reset to the closed position, and the demoulding hole (101) and the residue in the auxiliary demoulding box (1) are cleaned.

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