Maintenance mold for concrete precast pile

Abstract

The utility model discloses a maintenance mould of concrete precast pile, including pipe mould body, seal cover and gas delivery pipe, pipe mould body includes upper mould body and lower mould body, upper mould body and lower mould body can be mutually spliced and through the bolt fixed connection, after splicing, forms the pile cavity between the upper mould body and lower mould body, and the gas delivery pipe is equipped with the gas delivery pipe. The left end and the right end of the pipe die body are connected with end sealing plates, the two sealing covers are installed on the end sealing plates at the left end and the right end of the pipe die body in a butt joint mode respectively, steam interlayers are arranged on the die walls of the upper die body and the lower die body, and steam input ports are formed in the sealing covers and communicated with the steam interlayers. The gas conveying pipe can be inserted into a center hole of the concrete precast pile, the sealing cover is provided with a curing gas input port, and the curing gas input port is connected with a pipeline of the gas conveying pipeline. The device has the function of directly introducing steam and CO2 gas, and gas can be directly added to a pipe mold for curing in the curing stage, so that a large number of curing resources can be saved, and the maintenance cost is reduced. And the production requirements of few sample precast piles are met.

Description

Technical Field

[0001] The utility model relates to the technical field of the production of precast concrete piles, and more specifically, to a maintenance mold for precast concrete piles. Background Art

[0002] The maintenance of precast concrete piles is a crucial link in the production process of precast piles. The purpose of steam maintenance is to rapidly increase the overall strength of precast concrete piles, and the quality of maintenance will directly affect the strength of the final precast concrete piles. At present, the more widely used maintenance method is to stack the centrifuged precast pile molds in a large steam curing pond or autoclave for maintenance operations. Such large steam curing ponds or autoclaves can maintain dozens of precast pile molds simultaneously, having the advantage of large production volume, but they also have a large floor area and high production energy consumption.

[0003] In the actual production process, there is a need for preliminary samples of precast concrete piles. The number of precast concrete piles for preliminary samples is not large, usually only a small number of them, but their maintenance requirements are still the same as those in batch production. At present, the precast concrete piles for samples can only be maintained by placing the molds in existing large-scale maintenance equipment during the maintenance stage (according to production requirements, enterprises only purchase large-scale maintenance equipment). When using large-scale maintenance equipment, the gas concentration and temperature in the pond or autoclave need to be raised to the specified target and maintained for a period of time. Each time it is started, it consumes a large amount of resources. Due to the small number of sample molds in the equipment, there will be a serious problem of resource waste during the sample maintenance. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art, and provide a maintenance mold for precast concrete piles. The maintenance mold itself can meet the requirements of centrifugal pile production, and the maintenance mold also has a structure for introducing steam and CO2 gas, and can directly add gas to the mold for maintenance during the maintenance stage.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A maintenance mold for precast concrete piles, used for the production of precast concrete piles, includes a pipe mold body, a sealing cover and a gas delivery pipe. The pipe mold body includes an upper mold body and a lower mold body. The upper mold body and the lower mold body can be assembled with each other and fixedly connected by bolts. A pile cavity is formed between the assembled upper mold body and the lower mold body. Head plates are connected to both the left and right ends of the pipe mold body. Two sealing covers are respectively butt-mounted on the head plates at both ends of the pipe mold body. A precast concrete pile can be made in the pile cavity. Steam interlayers are provided on the mold walls of the upper mold body and the lower mold body. A steam input port is provided on the sealing cover. The steam input port is connected to the steam interlayer. Steam can be introduced into the steam interlayer through the steam input port. The gas delivery pipe can be inserted into the central hole of the precast concrete pile. A maintenance gas input port is provided on the sealing cover. The maintenance gas input port is connected to the gas delivery pipe through a pipeline. Internal gas for maintenance can be introduced into the gas delivery pipe through the maintenance gas input port.

[0007] Further, the upper mold body and the lower mold body have the same structure. The mold walls of the upper mold body and the lower mold body both include an inner pipe wall and an outer pipe wall. The outer pipe wall is sleeved outside the inner pipe wall. A gap space is formed between the inner pipe wall and the outer pipe wall, and this gap space is set as the steam interlayer. The head plate is provided with a steam through hole. A steam cavity is provided on the sealing cover. After the sealing cover is installed, the steam through hole correspondingly connects the steam interlayer and the steam cavity. The steam input port on the sealing cover is correspondingly opened to connect to the steam cavity.

[0008] Further, the number of steam through holes is not less than ten. All the steam through holes are opened on the same circumferential line and are evenly distributed along the circumferential line. The number of steam input ports is not less than three.

[0009] Further, the inner pipe wall is made of a heat-conducting material, and the outer side of the outer pipe wall is coated with a heat-insulating layer.

[0010] Further, the maintenance gas input port is opened at the central position of the sealing cover. A pipe connection cavity is provided on the inner end face of the sealing cover. The maintenance gas input port is connected to the pipe connection cavity through a pipeline. Connecting gas hoses are installed at both ends of the gas delivery pipe. The connecting gas hoses can be connected to the pipe openings in the pipe connection cavity.

[0011] Further, three rows of support feet are installed on the outer wall of the gas delivery pipe. The interval angle of each row of support feet is set to 120 degrees. The distance between each support foot in each row is set to two meters. Two rows of exhaust holes are provided between adjacent two rows of support feet. The distance between each exhaust hole in each row is set to one meter.

[0012] Further, the support foot includes a support rod. One end of the support rod is fixedly connected to the outer wall of the gas delivery pipe, and the other end is movably installed with a roller.

[0013] Further, the steam inlet and the connecting pipe cavity are provided with threads, and a sealing plug can be threadedly installed on the steam inlet and the connecting pipe cavity.

[0014] The beneficial effects of the present utility model are as follows:

[0015] The pipe mold body of the present utility model can meet the requirements of centrifugal pile making. The mold wall of the pipe mold body is provided with a steam interlayer, and steam can be directly introduced during the maintenance stage to meet the requirements of maintenance temperature rise. A gas delivery pipe can be installed inside the pipe mold body, and the gas delivery pipe can introduce maintenance gases such as CO2 to meet the requirements of maintenance production. The present utility model can perform direct gas addition and maintenance for a single root, so that the mold does not need to enter a large-scale maintenance equipment for maintenance, which can not only well meet the production requirements of a small number of sample piles, but also greatly save maintenance resources. During the process of using the present utility model for maintenance production, the maintenance gas directly and fully contacts with the pile, and the effect of the gas is more obvious, which can greatly shorten the maintenance time and improve the production efficiency. Description of the Drawings

[0016] Figure 1 It is a cross-sectional view of a maintenance mold for a precast concrete pile in the maintenance stage in this embodiment;

[0017] Figure 2 is Figure 1 the cross-sectional view at A-A in

[0018] Figure 3 It is the cross-sectional structure diagram of the gas delivery pipe in this embodiment;

[0019] Figure 4 It is the installation schematic diagram of the sealing cover in the non-maintenance stage in this embodiment;

[0020] Figure 5 It is the outer end face view of the sealing cover in this embodiment.

[0021] Reference numerals: pipe mold body 1, upper mold body 11, steam interlayer 111, inner pipe wall 112, outer pipe wall 113, lower mold body 12, pile cavity 13, head plate 14, steam through hole 141, insulation layer 15, sealing cover 2, steam inlet 21, maintenance gas inlet 22, steam cavity 23, sealing plug 24, connecting pipe cavity 25, gas delivery pipe 3, gas connection hose 31, support feet 32, support rods 321, rollers 322, exhaust holes 33, precast concrete pile 4. Detailed Embodiment

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] As Figures 1 - 5 shown, a maintenance mold for a concrete precast pile is used for the production of a concrete precast pile 4. It includes a pipe mold body 1, a sealing cover 2, and a gas delivery pipe 3. The pipe mold body 1 includes an upper mold body 11 and a lower mold body 12. The upper mold body 11 and the lower mold body 12 can be assembled with each other and fixedly connected by bolts. A pile cavity 13 is formed between the assembled upper mold body 11 and lower mold body 12. Head plates 14 are connected to both the left and right ends of the pipe mold body 1. The head plates 14 are used to connect the sealing cover 2. Two sealing covers 2 are respectively butt-mounted on the head plates 14 at both ends of the pipe mold body 1. When using the present utility model to produce a concrete precast pile specimen, first separate the upper mold body 11 and the lower mold body 12, load the bundled steel reinforcement cage into the lower mold body 12, and pour concrete into it. Then combine the upper mold body 11 and the lower mold body 12, and install the sealing covers 2 on both sides. The sealing covers 2 can achieve the effect of closing both ends of the pile cavity 13, and the entire pipe mold is assembled. Place the pipe mold on a rolling centrifuge and roll it, and a concrete precast pile 4 can be made in the pile cavity 13. The above use process of the present utility model can meet the preliminary production of concrete precast piles for specimens. The present utility model is provided with steam interlayers 111 on the mold walls of the upper mold body 11 and the lower mold body 12, and a steam input port 21 is provided on the sealing cover 2. The steam input port 21 is connected to the steam interlayer 111. Steam can be introduced into the steam interlayer 111 through the steam input port 21. The gas delivery pipe 3 can be inserted into the central hole of the concrete precast pile 4 (as Figure 1 shown, the concrete precast pile 4 is a hollow pipe pile with a central hole inside). A maintenance gas input port 22 is provided on the sealing cover 2. The maintenance gas input port 22 is connected to the gas delivery pipe 3 through a pipeline. Internal gas for maintenance can be introduced into the gas delivery pipe 3 through the maintenance gas input port 22. After the pile is made, maintenance operations need to be carried out. The present utility model has a special design for the mold wall and the sealing cover 2, and can directly introduce the steam (for temperature rise) and other gases (such as CO2 gas) required for maintenance into the pipe mold. In this way, the present utility model does not need to enter a large-scale maintenance equipment for maintenance. The present utility model can directly complete the maintenance operation independently, and it can well solve the problem of resource waste of large-scale maintenance equipment during specimen production. The present utility model has a single-body maintenance function, so it is particularly suitable for the small-scale specimen production of concrete precast piles 4. Of course, the present utility model can also be purchased in batches for application to meet the production requirements of batch concrete precast piles 4.

[0024] AsFigure 1 and Figure 2 As shown, the upper die body 11 and the lower die body 12 have the same structure. The die walls of the upper die body 11 and the lower die body 12 both include an inner pipe wall 112 and an outer pipe wall 113. The outer pipe wall 113 is sleeved outside the inner pipe wall 112, and a gap space is formed between the inner pipe wall 112 and the outer pipe wall 113. This gap space is set as a steam interlayer 111. The end head plate 14 serves to seal the left and right ends of the steam interlayer 111. The end head plate 14 is provided with a steam through hole 141. A steam cavity 23 is provided on the sealing cover 2. After the sealing cover 2 is installed, the steam through hole 141 corresponds to connect the steam interlayer 111 and the steam cavity 23. The steam input port 21 on the sealing cover 2 is correspondingly opened to connect to the steam cavity 23. In this way, a steam channel is formed from the steam input port 21 to the steam cavity 23 and then to the steam interlayer 111. When steam is input through the steam input port 21, the steam can enter the steam interlayer 111, and the steam can bring a temperature rise to the entire pipe die to meet the maintenance temperature requirements. In the present utility model, steam can be input into both sealing covers 2, and simultaneous steam input on both the left and right can quickly raise the temperature of the pipe die.

[0025] As Figure 2 shown, the number of openings of the steam input port 21 is not less than three, preferably three. In this way, the steam input volume per unit time can meet the requirements. The number of openings of the steam through holes 141 is not less than ten. All the steam through holes 141 are opened on the same circumferential line and are evenly distributed along the circumferential line. The steam through holes 141 determine the distribution of the steam entering the steam interlayer 111. The evenly distributed steam through holes 141 can comprehensively and evenly cover the cross-section of the steam interlayer 111. This helps the uniform heating of the steam interlayer 111. As Figure 1 shown, the inner pipe wall 112 is made of a heat-conducting material to ensure that the steam heat energy can be quickly transferred to the precast concrete pile 4 in the pile cavity 13. The outer side of the outer pipe wall 113 is coated with a heat-insulating layer 15. The heat-insulating layer 15 is made of rigid polyurethane foam plastic, which can well isolate the heat from escaping to reduce the energy consumption during maintenance.

[0026] As Figure 5 shown, the maintenance gas input port 22 is opened at the central position of the sealing cover 2. A connecting pipe cavity 25 is provided on the inner end face of the sealing cover 2. The maintenance gas input port 22 is connected to the connecting pipe cavity 25 through a pipeline. Both ends of the gas delivery pipe 3 are provided with gas connection hoses 31. The gas connection hoses 31 can be connected to the pipe openings in the connecting pipe cavity 25. Maintenance gases such as CO2 are input through the maintenance gas input port 22, and then are transported into the gas delivery pipe 3 through the gas connection hoses 31. After the centrifugal pile-making operation is completed, the sealing covers 2 on both sides of the pipe die are opened, the gas delivery pipe 3 is inserted into the precast concrete pile 4, and then the gas connection hoses 3 are connected to the pipe openings in the connecting pipe cavity 25, and finally the sealing covers 2 are covered back. After this operation is completed, the maintenance gas can be input.

[0027] As Figure 1 andFigure 3 As shown in the figure, three rows of support feet 32 are installed on the outer wall of the gas delivery pipe 3. The interval angle of each row of support feet 32 is set to 120 degrees, and the three rows of support feet 32 are distributed in a triangular shape, ensuring that the gas delivery pipe 3 can be installed in the precast concrete pile 4. The distance between each support foot 32 in each row is set to two meters. Two rows of exhaust holes 33 are provided between adjacent two rows of support feet 32. The exhaust holes 33 play a role in exhausting the maintenance gas. The exhausted maintenance gas can directly contact and act on the precast concrete pile 4, which can accelerate the maintenance production and shorten the maintenance time. The distance between each exhaust hole 33 in each row is set to one meter, and the exhaust holes 33 are evenly distributed, so that the maintenance gas can act on the precast concrete pile 4 evenly.

[0028] As Figure 3 shown in the figure, the support foot 32 includes a support rod 321. One end of the support rod 321 is fixedly connected to the outer wall of the gas delivery pipe 3, and the other end is movably installed with a roller 322. The roller 322 can reduce the moving resistance. In this way, the support foot 32 can not only play a role as a fulcrum, but also make the operation of loading and pulling out the gas delivery pipe 3 very smooth.

[0029] As Figure 4 shown in the figure, during the centrifugal pile-making operation, the sealing cover 2 does not need to be ventilated, but the end face needs to be ensured to be closed. Therefore, in the present utility model, the steam inlet 21 and the connecting pipe cavity 25 are designed to have threads. During the centrifugal pile-making operation stage, a sealing plug 24 can be threadedly installed on the steam inlet 21 and the connecting pipe cavity 25, ensuring that the sealing cover 2 has a closed effect. When maintenance is needed, the sealing plug 24 can be conveniently screwed off. The steam inlet 21 can be connected to a steam pipeline, and the connecting pipe cavity 25 can be connected to a gas receiving hose 31.

[0030] The above are only the preferred embodiments of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the idea of the present utility model belong to the protection scope of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. A curing mould for precast concrete piles, used for the production of precast concrete piles (4), characterized in that: The invention comprises a pipe mold body (1), a sealing cover (2) and a gas delivery pipe (3), wherein the pipe mold body (1) comprises an upper mold body (11) and a lower mold body (12), wherein the upper mold body (11) and the lower mold body (12) can be assembled with each other and fixedly connected by bolts, and a pile cavity (13) is formed between the assembled upper mold body (11) and the lower mold body (12), and the left and right ends of the pipe mold body (1) are connected with a head plate (14), and the two sealing covers (2) are respectively docked and installed on the head plates (14) at the left and right ends of the pipe mold body (1), and a concrete prefabricated pile (4) can be made in the pile cavity (13). ) and the mold wall of the lower mold body (12) are provided with a steam interlayer (111), the sealing cover (2) is provided with a steam input port (21), the steam input port (21) is connected to the steam interlayer (111), steam can be introduced into the steam interlayer (111) through the steam input port (21), the gas delivery pipe (3) can be inserted into the center hole of the concrete precast pile (4), the sealing cover (2) is provided with a curing gas input port (22), the curing gas input port (22) is connected to the gas delivery pipe (3), and internal gas for curing can be introduced into the gas delivery pipe (3) through the curing gas input port (22).

2. A curing mold for precast concrete piles according to claim 1, characterized in that: The upper mold body (11) and the lower mold body (12) have the same structure. The mold walls of the upper mold body (11) and the lower mold body (12) both include an inner tube wall (112) and an outer tube wall (113). The outer tube wall (113) is mounted on the outer side of the inner tube wall (112). A gap space is formed between the inner tube wall (112) and the outer tube wall (113). The gap space is set as a steam interlayer (111). The head plate (14) is provided with a steam through hole (141). The sealing cover (2) is provided with a steam cavity (23). After the sealing cover (2) is installed, the steam through hole (141) is correspondingly connected to the steam interlayer (111) and the steam cavity (23). The steam input port (21) on the sealing cover (2) is opened to correspond to the steam cavity (23).

3. A curing mold for precast concrete piles according to claim 2, characterized in that: The number of the steam through holes (141) is not less than ten, all of the steam through holes (141) are located on the same circumference and are evenly distributed along the circumference, and the number of the steam input ports (21) is not less than three.

4. A curing mold for precast concrete piles according to claim 2, characterized in that: The inner tube wall (112) is made of a heat-conducting material, and the outer side of the outer tube wall (113) is coated with a heat-insulating layer (15).

5. The curing mold for precast concrete piles according to claim 1, characterized in that: The maintenance gas input port (22) is provided at the central position of the sealing cover (2); a connecting cavity (25) is provided on the inner end surface of the sealing cover (2); the maintenance gas input port (22) is connected to the connecting cavity (25); and gas connecting hoses (31) are installed at both ends of the gas delivery pipe (3); and the gas connecting hoses (31) can be connected to the pipe opening in the connecting cavity (25).

6. A curing mold for precast concrete piles according to claim 1, characterized in that: Three rows of support legs (32) are installed on the outer wall of the gas delivery pipe (3), the spacing angle of the support legs (32) in each row is set to 120 degrees, the spacing between each support leg (32) in each row is set to two meters, two rows of exhaust holes (33) are opened between two adjacent rows of support legs (32), and the spacing between each exhaust hole (33) in each row is set to one meter.

7. A curing mold for precast concrete piles according to claim 6, characterized in that: The supporting foot (32) comprises a support rod (321), one end of the support rod (321) is fixedly connected to the outer wall of the gas delivery pipe (3), and the other end is movably provided with a roller (322).

8. The curing mold for precast concrete piles according to claim 5, characterized in that: The steam input port (21) and the connecting cavity (25) are provided with threads, and the steam input port (21) and the connecting cavity (25) can be threadedly mounted with a sealing plug (24).

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