A vertical push-pull mold for prefabricated round pipe culvert

Abstract

The application discloses a prefabricated round pipe culvert vertical push-pull mold, which comprises a base and a bottom mold fixed on the upper portion of the base, a vertical inner mold is arranged in the bottom mold, half-round outer mold plates capable of being pushed and pulled and combined with the bottom mold are arranged on the two sides of the inner mold, an air inflation film assembly is arranged on the outer side of the inner mold, and top mold plates combined with the half-round outer mold plates are arranged on the top of the half-round outer mold plates. The vertical push-pull mold is simple and convenient to operate on site, safe and reliable, and can effectively save the mold plate installation time, has high construction speed and construction quality, and the air inflation film assembly of the pouring cavity can support the flexible sleeve on the inner wall of the round pipe culvert outward, so that the round pipe culvert and the air inflation film assembly become an integral whole to prolong the service life, and the air inflation inner film of the air inflation film assembly is not in contact with the inner wall of the round pipe culvert after deflation, so that the inner pipe culvert is convenient to demold and operation is more convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of circular pipe culvert molds, in particular to a prefabricated circular pipe culvert vertical push-pull mold. BACKGROUND

[0002] The traditional prefabricated circular pipe culvert template is assembled by two shaped semicircular steel templates, and the frame is connected by bolts. In actual construction, a special pedestal for pouring is needed to place the template, which increases the construction process. The template installation process needs to consume 50 minutes, which cannot guarantee the template assembly speed, slows down the subsequent construction of the circular pipe culvert, and the concrete circular pipe culvert poured by the steel template will gradually leak due to aging or corrosion problems, resulting in settlement of the circular pipe culvert. SUMMARY

[0003] In order to solve the above problems, the present application provides a prefabricated circular pipe culvert vertical push-pull mold.

[0004] The present application is achieved by the following technical solutions:

[0005] A prefabricated circular pipe culvert vertical push-pull mold, comprising a base and a bottom mold fixed on the upper part of the base, a vertical inner mold is arranged in the bottom mold, two semicircular outer mold plates capable of moving and combined with the bottom mold are arranged on the two sides of the inner mold, an inflatable film assembly is arranged on the outer side of the inner mold, and a top mold plate combined with the two semicircular outer mold plates is arranged on the top of the two semicircular outer mold plates.

[0006] Further, the bottom mold comprises a lower annular ring, and a support ring with a "Z" shaped cross section is connected to the upper part of the annular ring.

[0007] Further, the inner mold is fixed on the base and coaxially arranged with the bottom mold, an annular sealing cavity is arranged between the annular ring of the bottom mold and the inner mold, and a boss cavity is formed between the upper part of the Z-shaped support ring and the inner mold.

[0008] Further, the two semicircular outer mold plates are movably arranged on the outer side of the support ring and form a pouring cavity of the circular pipe culvert between the inflatable film assembly.

[0009] Further, the inflatable film assembly comprises an inflatable inner film sleeved on the outer side of the inner mold, and a flexible sleeve is sleeved on the outer side of the inflatable inner film.

[0010] Further, the inside of the inflatable inner film is provided with a plurality of closed partitions, the plurality of closed partitions divide the inside of the inflatable inner film into a plurality of inflatable cavities, a corresponding inflatable pipe is arranged in each of the plurality of inflatable cavities, and the gas inlet of the inflatable pipe penetrates through the closed partition and is connected with the inflatable nozzle installed at the lower part of the inflatable inner film.

[0011] Further, a rigid inner ring is movably arranged in the boss cavity of the support ring, and the inner side of the rigid inner ring is coated with a layer of sealing glue for bonding and fixing the flexible sleeve.

[0012] Further, sliding wheels for movement are installed on both sides and the tail end of the semicircular outer formwork, the sliding wheels on both sides are supported on the sliding rails opened on the outer side of the base, and the sliding wheel on the tail end is supported on the support frame in the center of the base.

[0013] Further, the semicircular outer formwork on both sides and the top formwork on the top are fixed by bolts, and an operation platform is installed on the upper outer side of the semicircular outer formwork.

[0014] Further, a circular table forming a clamping groove of the circular pipe culvert is arranged on the lower part of the top formwork.

[0015] Compared with the prior art, the vertical push-pull mold of the present application has the advantages of simple and convenient on-site assembly operation, safety and reliability, fast butt joint construction, effective saving of formwork installation time, fast construction speed, high construction quality, and the inflatable membrane assembly of the pouring cavity can support the flexible sleeve outward on the inner wall of the circular pipe culvert, not only directly forming a whole with the circular pipe culvert to prolong the service life, but also not contacting the inner wall of the circular pipe culvert after deflation, facilitating the demolding of the interior of the circular pipe culvert and making the operation more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural decomposition schematic diagram of the present application;

[0017] Figure 2 is a sectional view of Figure 1 ;

[0018] Figure 3 is a partial structure schematic enlarged view in Figure 2 ;

[0019] Figure 4 is a structure sectional view of the present application after pouring;

[0020] Figure 5 is a partial structure schematic enlarged view in Figure 4 ;

[0021] Figure 6 is a structure schematic diagram of the circular pipe culvert of the present application;

[0022] Figure 7 is a structure schematic diagram of the inflatable inner membrane of the present application;

[0023] Figure 8 is a pouring schematic diagram of the circular pipe culvert of the present application;

[0024] In the diagram: 1. Base; 2. Bottom mold; 201. Rigid inner ring; 3. Inner mold; 4. Annular ring; 5. Support ring; 6. Annular sealing cavity; 7. Boss cavity; 8. Semi-circular outer template; 9. Slide rail; 10. Sliding wheel; 11. Operating platform; 12. Inflatable inner membrane; 121. Partition; 122. Inflatable cavity; 123. Inflatable pipe; 13. Inflatable nozzle; 14. Flexible sleeve; 15. Top template; 151. Frustum; 16. Circular culvert; 161. Boss; 162. Slot; 17. Crane; 18. Hopper; 19. Discharge port. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0026] like Figure 1 As shown, a prefabricated circular culvert vertical push-pull mold includes a base 1 and a bottom mold 2 fixed on its upper part. The base 1 is machined and set by a metal frame. A vertical inner mold 3 is set inside the bottom mold 2. The inner mold 3 is set by a metal cylinder, which mainly serves to support the inflatable membrane assembly. Semi-circular outer templates 8 that can be pushed and pulled and combined with the bottom mold 2 are set on both sides of the inner mold 3. An inflatable membrane assembly is set on the outer side of the inner mold 3. A top template 15 that is combined and connected with the top of the semi-circular outer templates 8 on both sides is set on the top.

[0027] like Figure 2 , 3 As shown, the bottom mold 2 includes a lower annular ring 4, and a support ring 5 with a "Z" shaped cross-section is connected to the upper part of the annular ring 4. The annular ring 4 and the support ring 5 are integrally set.

[0028] like Figure 3 As shown, the inner mold 3 is fixed on the base 1 and coaxially arranged with the bottom mold 2. An annular sealing cavity 6 is provided between the annular ring 4 of the bottom mold 2 and the inner mold 3. The upper part of the Z-shaped support ring 5 forms a boss cavity 7 between the inner mold 3 and the inner mold 3.

[0029] like Figure 4 As shown, after the semi-circular outer templates 8 on both sides move and seal against the outside of the support ring 5, they form a casting cavity for the circular culvert 16 between the inflatable membrane assembly and the support ring 5.

[0030] like Figure 5 As shown, the inflatable membrane assembly includes an inflatable inner membrane 12 sleeved on the outside of the inner mold 3. A flexible sleeve 14 is sleeved on the outside of the inflatable inner membrane 12. The flexible sleeve 14 is made of flexible rubber, which can not only form the inner lining layer of the cast circular culvert 16, but also isolate the inflatable inner membrane 12 from the circular culvert 16, making it easy to detach the inflatable inner membrane 12 after deflation. After the inflatable inner membrane 12 is inflated, it expands the flexible sleeve 14 outward and seals it against the inside of the annular ring 4.

[0031] like Figure 7As shown, the inside of the inflatable inner membrane 12 is provided with a plurality of closed partitions 121, which separate the inflatable inner membrane 12 into a plurality of inflatable cavities 122, and the pressures of the separated inflatable cavities 122 are different when inflated. When three inflatable cavities 122 are separated, the pressures of the upper, middle and lower inflatable cavities 122 are P1, P2 and P3 respectively. The pressure of the inflatable cavity 122 is P = ρgh, where ρ is the density of the cast concrete, g is the acceleration of gravity, and h is the casting depth. The casting depths of the three inflatable cavities 122 are h1, h2 and h3, and the depth h is the distance from the top formwork 15 to the center of the corresponding inflatable cavity 122. In this way, the step inflation according to different casting depths can offset the extrusion pressure of the concrete in different depth areas outside the inflatable inner membrane 12, avoid deformation caused by the extrusion of the pressure in different depth areas outside, and ensure the force balance of the inflatable inner membrane 12. In this way, the inside of the cast circular pipe culvert 16 is smoother and more stable. The plurality of inflatable cavities 122 are provided with corresponding inflatable pipes 123. The air inlet of the inflatable pipe 123 penetrates the closed partition 121 and is connected to the inflatable nozzle 13 installed at the lower part of the inflatable inner membrane 12. The different inflatable cavities 122 can be inflated and deflated through the plurality of inflatable nozzles 13 and inflatable pipes 123, so as to ensure the convenience of operation.

[0032] As shown in Figure 5 The rigid inner ring 201 is movably placed in the boss cavity 7 of the support ring 5. The inner side of the rigid inner ring 201 is coated with a layer of sealant for bonding and fixing the flexible sleeve 14. The rigid inner ring 201 is sealed and connected with the flexible sleeve 14 through the sealant, which can prevent the leakage of subsequent concrete materials. Moreover, the rigid inner ring 201 is integrated with the boss 161 of the circular pipe culvert 16, which improves the strength of the boss 161 and prolongs the service life of the boss 161.

[0033] As shown in Figure 1 The two sides and the tail end of the semicircular outer formwork 8 are provided with sliding wheels 10 for movement. The two sides of the sliding wheels 10 are supported on the sliding rails 9 opened on the outside of the base 1, and the sliding wheels 10 at the tail end are supported on the support frame in the center of the base 1. In this way, the assembly and disassembly of the mold can be realized by moving the semicircular outer formwork 8 forward and backward through the sliding wheels 10, which is more time-saving and labor-saving.

[0034] As shown in Figure 8 The two semicircular outer formworks 8 and the top formwork 15 are fixed by bolts. The upper outside of the semicircular outer formwork 8 is provided with an operation platform 11.

[0035] As shown in Figure 8 The lower part of the top formwork 15 is provided with a circular table 151 forming a clamping groove 162 of the circular pipe culvert 16.

[0036] The implementation principle of the vertical push-pull mold for prefabricating a circular pipe culvert according to the embodiment of the application is as follows:

[0037] When using, first, the rigid inner ring 201 coated with sealant on the inner side is sleeved on the inner mold 3 and is placed into the convex boss cavity 7 on the inner side of the lower bottom mold 2, then the inflatable inner membrane 12 and the flexible sleeve 14 of the inflatable membrane assembly are sleeved on the inner mold 3 in sequence, while the semicircular outer mold plate 8 on both sides of the base 1 is pushed to move towards the inner mold 3, so that the lower inner side of the semicircular outer mold plate 8 is attached to the side of the bottom mold 2, and after the attachment, the two ends of the semicircular outer mold plate 8 are connected and fixed by using bolts;

[0038] After the semicircular outer mold plate 8 is combined and fixed with the lower bottom mold 2, the inflatable pump is connected to the inflation nozzle 13, the multiple inflatable cavities 122 in the inflatable inner membrane 12 are inflated in stages through the multiple inflation nozzles 13, the inflatable inner membrane 12 is inflated and expanded, the flexible sleeve 14 on the outer side is expanded outward and is attached to the annular ring 4 of the bottom mold 2 and the inner side of the rigid inner ring 201, and the sealing and fixing are realized through the sealant on the inner side of the rigid inner ring 201, so that two axial seals are formed between the rigid inner ring 201 and the annular ring 4 and the flexible sleeve 14, and the leakage of the pouring material from the lower part is avoided, the installation of the entire mold can be effectively controlled to be completed within 20 minutes, and the work efficiency is greatly improved;

[0039] After the inflation, the steel reinforcement framework is placed in the pouring cavity and is supported by the supporting ring 5, after the placement, the crane 17 is used to lift the hopper 18 filled with the concrete material (as shown in Figure 8 The plug valve of the discharge port 19 on the lower part of the hopper 18 is opened, the material in the hopper 18 is filled into the pouring cavity, and at the same time, the operator standing on the operation platform 11 of the semicircular outer mold plate 8 uses the vibration rod to vibrate the concrete material in the pouring cavity, so that the concrete is densely combined, the honeycomb and pitted surface of the concrete is eliminated, the strength is improved, and finally the concrete material fills the pouring cavity (as shown in Figure 4 );

[0040] After the pouring, the crane is used to lift the top mold plate 15 and place it on the upper part of the pouring cavity and make it attached to the upper part of the semicircular outer mold plate 8, at the same time, the circular table 151 on the inner side of the top mold plate 15 is sleeved on the outer side of the corresponding flexible sleeve 14, so that the top of the pouring cavity is formed and blocked, and the subsequent solidification forms the clamping groove 162 through the compression of the circular table 151;

[0041] After the complete solidification for a period of time (6-9 hours), the upper top formwork 15 is removed, the multiple bolts of the two semicircular outer formworks 8 are continuously opened, the semicircular outer formworks 8 are pushed out along the base 1, the semicircular outer formworks 8 are separated from the casted circular pipe culvert 16, the splicing and dismounting of the outer formworks 8 are realized by the pushing and pulling of manpower, the time and labor are saved, the multiple inflation nozzles 13 of the lower inflatable inner formwork 12 are deflated, the inflatable inner formwork 12 is shrunk and separated from the flexible sleeve 14 adhered to the inner wall of the circular pipe culvert 16, the casted circular pipe culvert 16 is hoisted out after the separation, the whole process of the casted circular pipe culvert 16 does not need to be hoisted and transported, only the pushing and deflation and inflation are needed, and the casted circular pipe culvert 16 (as shown in Figure 6 the inner wall of which is directly adhered to a layer of the flexible sleeve 14 as an inner lining layer, the flexible sleeve 14 plays a role of waterproofing, anti-seepage and anti-internal pressure, the corrosion of the inner wall of the circular pipe culvert 16 is avoided, the service life is prolonged, the smoothness is higher, the water flow resistance is effectively reduced, and the water conveying efficiency is improved.

[0042] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above-mentioned embodiments, the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application, various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A vertical push-pull mould for pre-fabricating a circular pipe culvert, characterized in that: The utility model relates to a kind of movable formwork for circular pipe culvert, including base (1) and the bottom die (2) fixed on it, the bottom die (2) is provided with vertical inner die (3) in it, the both sides of the inner die (3) are provided with semicircular outer die plate (8) that can push and pull movement and combine with bottom die (2), the outside of the inner die (3) is provided with inflatable membrane assembly, the top of the both sides semicircular outer die plate (8) is provided with top die plate (15) combined with it. The bottom die (2) includes lower annular ring (4), the upper portion of the annular ring (4) is connected with the support ring (5) of section "Z" shape;The inner die (3) is fixed on the base (1) and is coaxially arranged with the bottom die (2), the annular ring (4) of the bottom die (2) is provided with annular sealing cavity (6) between the inner die (3), and the convex cavity (7) is formed between the upper portion of the Z-shaped support ring (5) and the inner die (3). The inflatable membrane assembly includes inflatable inner membrane (12) sleeved on the outside of the inner die (3), the outside of the inflatable inner membrane (12) is sleeved with flexible sleeve (14), the flexible sleeve (14) is expanded outward after the inflatable inner membrane (12) is inflated and is sealed and fitted with the inside of the annular ring (4);The inside of the inflatable inner membrane (12) is provided with a plurality of closed layers (121), the plurality of closed layers (121) divide the inflatable inner membrane (12) into a plurality of inflatable cavities (122), a plurality of inflatable pipes (123) are provided in the plurality of inflatable cavities (122), the gas inlet of the inflatable pipe (123) penetrates the closed layer (121) downward and is connected with the inflation nozzle (13) installed at the lower portion of the inflatable inner membrane (12);The rigid inner ring (201) is movably placed in the convex cavity (7) of the support ring (5), and the inside of the rigid inner ring (201) is coated with a layer of sealing glue that is fixedly bonded with the flexible sleeve (14).

2. A vertical push-pull mould for preformed circular pipe culverts according to claim 1, characterised in that: After the both sides of the semicircular outer die plate (8) are moved and sealed and fitted with the outside of the support ring (5), the pouring cavity of the circular pipe culvert (16) is formed between the inflatable membrane assembly.

3. A vertical push-pull mould for preformed circular pipe culverts according to claim 1, characterised in that: The both sides and the tail end of the semicircular outer die plate (8) are provided with sliding wheels (10) for movement, the both sides of the sliding wheels (10) are supported on the slide rails (9) opened on the outside of the base (1), and the sliding wheel (10) at the tail end is supported on the support frame in the center of the base (1).

4. A vertical push-pull mould for preformed circular pipe culverts according to claim 3, characterised in that: The both sides of the semicircular outer die plate (8) and the top die plate (15) at the top are fixed by bolts, and the upper outside of the semicircular outer die plate (8) is provided with an operation platform (11).

5. A vertical push-pull mould for preformed circular pipe culverts according to claim 4, characterised in that: The lower portion of the top die plate (15) is provided with a circular table (151) forming the clamping groove (162) of the circular pipe culvert (16).

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