WO2020238400A1

WO2020238400A1 - Steam curing apparatus for concrete precast piles

Info

Publication number: WO2020238400A1
Application number: PCT/CN2020/082619
Authority: WO
Inventors: 李全民; 李近朱; 袁志洲; 李建宇; 王永; 颜景凯
Original assignee: 南京钜力智能制造技术研究院有限公司
Priority date: 2019-05-30
Filing date: 2020-03-31
Publication date: 2020-12-03
Also published as: CN110027100B; CN110027100A

Abstract

The present invention relates to a steam curing apparatus for concrete precast piles, comprising: a conveying channel, the feed end of the conveying channel being located above the discharge end thereof in a vertical direction, so that the conveying channel is arranged in an inclined state, and the conveying channel being suitable for moving precast concrete piles from the feed end to the discharge end, and the plurality of concrete precast piles being arranged to abut each other on the conveying channel; a steam curing unit, the steam curing unit being suitable for the passage of the conveying channel, and forming a sealed cavity with the concrete precast piles on the conveying channel, the sealed cavity being connected to a steam conveying device, and the steam conveying device conveying steam to the sealed cavity. In the present invention, a conveying channel type curing structure is used, it is not necessary to construct a plurality of steam curing pools and pool covers thereof, it is not necessary to repeatedly lift and move the concrete precast piles from conventional curing pools, the concrete precast piles can rationally and fully be cured with steam, thereby effectively reducing the damage to the precast concrete piles during repeated lifting, effectively reducing steam loss and waste, and improving curing quality.

Description

Steam curing device for concrete precast pile

Technical field

The invention relates to a steam curing device for precast concrete piles.

Background technique

At present, in the production process of precast concrete piles, it is necessary to steam curing the precast concrete piles. The existing technology generally designs multiple steam curing tanks in the factory building, for example, the general steam curing tank has a depth of more than 3 meters, a length of about 17 meters, and a width. Nearly 3 meters, the steel molds of the concrete precast piles need to be lifted by cranes when they are put into or removed from the steaming tank. Although the crane is suitable for vertical lifting, the crane requires manual operation by the driver and the technical ability of the driver Both the sense of responsibility and the sense of responsibility will affect the lifting and transportation of the steel mold of the concrete precast pile. The steel mold is prone to the problem of steel mold collision due to the excessive falling speed during the lifting process, which leads to the damage of the concrete precast pile inside the steel mold newly entering the pool. The steel mold is also prone to deformation due to impact, and the frequent entry and exit of the steel mold into and out of the steaming tank are manually operated by crane operators. Unskilled operators often cause the steel mold to swing excessively and collide with the side wall of the steaming tank. Damage to the sealed water tank at the top of the steam curing tank causes steam leakage and increases maintenance costs. The existing steel pool covers have a large mass and volume, and some weigh up to 6 tons. Frequent opening and closing of the cover will also cause collision and deformation due to operating errors. After the deformation of the pool cover, the problem of not tightly closing and air leakage will occur.

Summary of the invention

The present invention provides a steam curing device for precast concrete piles. The structure design is reasonable. The conveying channel type curing structure is adopted. There is no need to construct multiple steam curing pools and their covers. The precast concrete piles do not need to be repeatedly removed from the traditional curing pool. Hoisting and moving, only need to follow the conveying channel to move, it can make reasonable and full use of steam for maintenance, which greatly improves the maintenance efficiency. The steel mold turnover utilization efficiency of the concrete precast piles during the entire maintenance process is high, and the steel mold investment is small, and effectively reduces The damage problem of the concrete precast pile during repeated lifting and transportation can effectively reduce the loss of steam, save the maintenance cost, improve the maintenance quality, and solve the problems in the prior art.

The technical solution adopted by the present invention to solve the above technical problems is: a steam curing device for precast concrete piles, including:

The conveying channel includes a feeding end and a discharging end. The feeding end is located above the discharging end in the vertical direction, so that the conveying channel is arranged in an inclined state, and the conveying channel is suitable for precast concrete piles. Moving from the feeding end to the discharging end, a plurality of precast concrete piles are arranged to abut each other on the conveying channel;

The steam curing unit includes a sealed cavity suitable for the conveying passage to pass through, and the sealed cavity is connected to a steam conveying device, and the steam conveying device conveys steam into the sealed cavity.

Further, it includes at least one preheating cavity, the preheating cavity is arranged between the sealed cavity and the feed end of the conveying channel; the preheating cavity and the steam conveying device are connected, and the preheating cavity The heat chamber is connected with a steam circulation device, and the steam circulation device transports the steam between the sealed chamber and the discharge end of the conveying channel into the preheating chamber.

Further, the sealed cavity and the preheating cavity are provided with a sealing device at the position where the conveying channel passes, and the sealing device is suitable for the precast concrete pile to move along the conveying channel and is compatible with the precast concrete The piles cooperate to form the sealed cavity and the preheating cavity in a relatively sealed state.

Further, the sealing device includes a first sealing portion and a second sealing portion, the first sealing portion includes a flexible cord set above the concrete precast pile, and the top end of the flexible cord is connected to the sealed cavity or The top of the thermal cavity is connected, and the bottom end of the flexible cord is arranged in abutment with the precast concrete pile; the second sealing part is arranged between the two ends of the precast concrete pile and the inner wall of the sealed cavity or preheating cavity Between location.

Further, the second sealing portion includes an overflow groove connected to the inner wall of the sealed cavity or the preheating cavity, the overflow groove is located above the concrete precast pile in the vertical direction, and the overflow groove passes through the pipeline and The water pump is connected, the water pump is connected to the reservoir, the reservoir is arranged below the discharge end of the conveying channel, and the water pump is suitable for conveying the water in the reservoir to the overflow tank. The water in the overflow tank overflows to form a water curtain; below the conveying channel is provided a backflow channel connected to the reservoir, and the overflowing and falling water in the overflow tank is transported to the reservoir through the backflow channel in.

Further, the conveying channel includes a track suitable for the movement of the precast concrete pile.

Further, a carrier is provided on the track of the conveying channel, and the carrier is suitable for carrying the

The prefabricated concrete pile is used to move the prefabricated concrete pile along the track; the bearing member is provided with a pallet for bearing the prefabricated concrete pile, and the bottom of the pallet is provided with a roller matching the track.

Further, the steam delivery device includes a first air delivery pipe arranged in the sealed cavity, the first air delivery pipe is connected to an external steam generator, and the first air delivery pipe extends in the sealed cavity and In the preheating cavity; the steam circulation device includes a second air supply pipe arranged in the preheating cavity, the second air supply pipe is connected to the air outlet of the exhaust fan, and the air inlet of the exhaust fan is connected to The position between the sealed cavity and the discharge end of the conveying channel.

Further, the conveying channel is provided with a cooling chamber at a position close to the upper part of the discharge end, the cooling chamber and the sealed cavity are arranged adjacently, and the cooling chamber is also provided with a cooling chamber near the discharge end of the conveying channel. The sealing device; the air inlet of the exhaust fan is connected to the cooling chamber via a pipeline, so that the steam that enters the cooling chamber from the sealed chamber is transported to the preheating chamber along the second air supply pipe.

Further, there are a plurality of the flexible curtain fabrics of each sealing device, and the plurality of flexible curtain fabrics are alternately arranged at intervals along the length direction of the conveying channel to form the first sealing portion.

The beneficial effects of the above-mentioned structure of the present invention are that its structural design is reasonable, the conveying channel type curing structure is adopted, there is no need to construct multiple steam curing pools and their pool covers, and the concrete precast piles do not need to be repeatedly lifted and moved from the traditional curing pool. Only need to follow the conveying channel to move, it can reasonably and make full use of steam for curing, which greatly improves the maintenance efficiency. During the whole curing process, the steel mold turnover utilization efficiency of the concrete precast piles is high, the steel mold investment is also small, and it effectively reduces the cost of the concrete precast piles. Damage problems occurred during repeated lifting, effectively reducing steam loss and waste, saving maintenance costs and improving maintenance quality.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic diagram of a partial enlarged structure of part A in FIG. 1.

In the figure, 1. Conveying channel; 2. Feeding end; 3. Discharging end; 4. Precast concrete pile; 5. Sealed cavity; 6. Preheating cavity; 7. Flexible curtain; 8. Overflow tank; 9. Water pump 10. Reservoir; 11. Return channel; 12. Track; 13. Division wheel; 14. Baffle; 15. Carrier; 16. First air supply pipe; 17, Steam generator; 18. Second delivery Air pipe; 19. Exhaust fan; 20. Cooling chamber; 21. Steam inlet pipe; 22. Backing plate; 23. Feeding slope; 24. Guide frame; 25. Booster jack; 26. Reducing gear; 27. Wedge ; 28, hydraulic cylinder.

Detailed ways

In order to clearly illustrate the technical characteristics of the present solution, the present invention will be described in detail below through specific implementations and in conjunction with the accompanying drawings.

In the following description, many specific details are set forth in order to fully understand this application. However, this application can also be implemented in other ways different from those described here. Therefore, the scope of protection of this application is not covered by the specific details disclosed below. Limitations of the embodiment.

In addition, in the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal" "," "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings It is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the application.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of this application, "multiple" means two or more than two, unless otherwise specifically defined.

In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , Or integrated; it can be a mechanical connection, it can be an electrical connection, it can also be communication; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two components or the interaction relationship between two components . For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In this application, unless expressly stipulated and defined otherwise, the “on” or “under” of the first feature on the second feature may be in direct contact with the first and second features, or indirectly through an intermediary. contact. In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean specific features described in conjunction with the embodiment or example , The structure, materials, or characteristics are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above-mentioned terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

As shown in Figure 1-2, a steam curing device for precast concrete piles includes a conveying channel 1 and a steam curing unit. The conveying channel 1 includes a feeding end 2 and a discharging end 3. The feeding end 2 is located in the vertical direction. Above the discharge end 3, the conveying channel 1 is arranged in an inclined state. The conveying channel 1 is suitable for moving the concrete precast piles 4 from the feed end 2 to the discharge end 3. A plurality of concrete precast piles 4 are on the conveying channel 1. The steam curing unit includes a sealed cavity 5, the sealed cavity 5 is suitable for the conveying channel 1 to pass through, the sealed cavity 5 is connected with the steam conveying device, and the steam conveying device conveys the steam into the sealed cavity 5. When in use, the concrete precast pile 4 is located inside the mold, and most of the molds are made of steel mold structure. The concrete precast pile 4 moves along the conveying channel 1 in the steel mold. Before entering the steam curing unit, it can be statically cured on the conveying channel 1 , And then enter the steam curing unit for steam curing. The whole process does not need to repeatedly lift the concrete precast pile 4, only need to lift the concrete precast pile 4 to the feeding end 2 of the conveying channel 1, and the concrete precast pile 4 then follows the conveying channel 1 Move, after completing the steam curing work, take out the concrete precast pile 4 from the discharge end 3 of the conveying channel 1, reducing the repeated lifting of the concrete precast pile 4 and effectively reducing the repeated lifting process of the concrete precast pile 4 and the steel mold The damage problems that occur in the process can effectively reduce the loss and waste of steam, save maintenance costs, and improve maintenance quality.

In a preferred embodiment, at least one preheating cavity 6 is included. The preheating cavity 6 is arranged between the sealed cavity 5 and the feed end 2 of the conveying channel 1; the preheating cavity 6 is connected to the steam conveying device, and the preheating cavity 6 is connected with a steam circulation device, which transfers the steam between the sealed cavity 5 and the discharge end 3 of the conveying channel 1 into the preheating cavity 6. When in use, the steam circulation device collects and utilizes the steam escaping from the sealed cavity 6 and re-introduces it into the preheating cavity 6 to warm up and preheat the concrete precast pile 4, make full use of the lost steam, improve maintenance efficiency and quality, and can Avoid escaping steam from affecting the working environment of the workshop.

In a preferred embodiment, the sealing cavity 5 and the preheating cavity 6 are provided with a sealing device at the position where the conveying channel 1 passes. The sealing device is suitable for moving the concrete precast pile 4 along the conveying channel 1, and is formed in cooperation with the concrete precast pile 4 The sealed cavity 5 and the preheating cavity 6 are relatively sealed.

In a preferred embodiment, the sealing device includes a first sealing part and a second sealing part. The first sealing part includes a flexible cord 7 arranged above the concrete precast pile 4, and the top end of the flexible cord 7 is connected to the sealed cavity 5 or preheating cavity. The top of 6 is connected, and the bottom end of the flexible cord 7 abuts against the precast concrete pile 4; the second sealing part is arranged between the two ends of the precast concrete pile 4 and the inner wall of the sealing cavity 5 or preheating cavity 6. When in use, the flexible cord 7 is hung in the corresponding position. When the concrete precast pile 4 passes by, the bottom of the flexible cord 7 can always overlap with the concrete precast pile 4 to form a relatively sealed isolated space, namely the sealed cavity 5 and the preheating cavity 6. .

In a preferred embodiment, the second sealing part includes an overflow groove 8 connected to the inner wall of the sealed cavity 5 or the preheating cavity 6, the overflow groove 8 is located above the concrete precast pile 4 in the vertical direction, and the overflow groove 8 passes through the pipeline and The water pump 9 is connected, the water pump 9 is connected to the reservoir 10, the reservoir 10 is arranged under the discharge end 3 of the conveying channel 1, and the water pump 9 is suitable for conveying the water in the reservoir 10 to the overflow tank 8. The overflow tank The water in 8 overflows to form a water curtain; below the conveying channel 1 is provided a backflow channel 11 connected to the reservoir 10, and the overflowing and falling water in the overflow tank 8 is transported to the reservoir 10 through the backflow channel 11. When in use, the water in the reservoir 10 is transported to the overflow tank 8 through the water pump 9. The overflow tank 8 overflows when the water is full, and the continuous water injection by the pump 9 will form a curtain waterfall below the overflow tank 8, effectively blocking the steam leakage area. When the water used is hot water, it can also play an auxiliary preheating effect on the precast concrete pile 4.

In a preferred embodiment, the conveying channel 1 includes a track 12 suitable for the movement of the precast concrete pile 4. Specifically, the conveying channel 1 can be several steel rails parallel to each other and spaced several meters apart. The design of the rails is set according to the shape of the steel mold, so that the surface of the steel mold and the rail are clamped together, so that the steel mold of the concrete precast pile 4 can be placed on the rail. Move up.

It is worth mentioning that when the conveying channel 1 is in the form of a track 12, the conveying channel 1 corresponding to the sealing device is provided with a grid wheel 13, and the circumferential surface of the grid wheel 13 is provided with multiple baffles 14, which are suitable for In contact with the steel mold surface of the concrete precast pile 4, the steel mold pushes the grid wheel 13 to rotate while the steel mold advances, and the continuous rotation of the baffle 14 always contacts the steel mold to seal off the steam.

It is worth mentioning that the baffle 14 adopts a structure with certain elastic deformation, for example, a rubber layer is coated on a metal plate to form a rubber plate, which can maintain good contact with the steel mold of the concrete precast pile 4 and form a good seal.

In a preferred embodiment, a bearing member 15 is provided on the track 12 of the conveying channel 1, and the bearing member 15 is suitable for bearing the concrete precast pile 4 so that the concrete precast pile 4 moves along the track 12; the bearing member 15 is provided with a bearing concrete precast pile The bottom of the tray is equipped with rollers matching the track. Specifically, the structural form of the bearing member 15 can directly select a stainless steel plate chain machine. In order to stably carry and move the precast concrete pile, a plurality of plate chain machines are arranged parallel to each other and spaced along the length direction of the concrete precast pile.

In a preferred embodiment, the steam delivery device includes a first air delivery pipe 16 arranged in the sealed cavity 5, the first air delivery pipe 16 is connected to an external steam generator 17, and the first air delivery pipe 16 extends in the sealed cavity 5 and In the preheating cavity 6; the steam circulation device includes a second air supply pipe 18 arranged in the preheating cavity 6, the second air supply pipe 18 is connected to the air outlet of the exhaust fan 19, and the air inlet of the exhaust fan 19 is connected to the sealed cavity 5 and The position between the discharge end 3 of the conveying channel 1.

In a preferred embodiment, the conveying channel 1 is provided with a cooling chamber 20 near the top of its discharge end 3. The cooling chamber and the sealed cavity 5 are arranged adjacently, and the cooling chamber 20 is also provided at a position close to the discharge end 3 of the conveying channel 1. Sealing device; the air inlet of the exhaust fan 19 is connected to the cooling chamber 20 through a pipeline, so that the steam entering the cooling chamber 20 from the sealed chamber 5 is transported to the preheating chamber 6 along the second air supply pipe 18. In order to better collect the steam escaping from the sealed cavity 5, the cooling chamber 20 is provided to form a relatively sealed space to prevent the steam from quickly dissipating into the outside air, and the air inlet of the exhaust fan 19 is connected to the cooling chamber 20 , To effectively collect the steam escaping from the sealed cavity 5 to the cooling cavity 20.

It is worth mentioning that the air inlet of the exhaust fan 19 is connected to the cooling chamber 20 via the steam inlet pipe 21, and the steam inlet pipe 21 is provided with branch pipes, which are connected with the flexible curtain 7 corresponding to the cooling chamber 20 at intervals. , Can increase the steam collection efficiency.

In a preferred embodiment, there are multiple flexible cords 7 of each sealing device, and the multiple flexible cords 7 are alternately arranged along the length direction of the conveying channel 1 to form a first sealing portion. The multiple flexible curtain fabrics 7 arranged alternately at intervals can increase the steam barrier effect.

It is worth mentioning that a backing plate 22 is provided under the overflow tank 8. The backing plate 22 is used to withstand the long-term washing of the water curtain. The backing plate 22 can be a cast stone backing plate to avoid the long-term impact of the water curtain. On the surface of related equipment, avoid the problem of "water dripping through stone".

It is worth mentioning that the feeding end 2 of the conveying channel 1 is provided with a feeding slope 23, the top surface of the feeding slope 23 is provided with a guide frame 24, and the bottom position in the guide frame 24 is provided with a booster jack 25 , The boosting jack 25 is suitable for pushing the precast concrete pile 4 at the position of the guide frame 24 to the feeding slope 23. The steel mold of the concrete precast pile 4 moves along the conveying channel 1 due to its own weight. The guide frame 24 can effectively guide and buffer the steel mold of the concrete precast pile 4, and the booster jack 25 can assist the steel mold to guide the material. The rack 24 moves to the feeding inclined surface 23 to make the entire feeding process smoother.

In addition, an auxiliary lifting device is provided at the position of the discharge end 3 of the conveying channel 1. The auxiliary lifting device includes a force reducing block 26 arranged at the corresponding position of the discharging end 3. The concrete precast pile 4 on the conveying channel 1 is separated from the conveying channel 1. Move to the force-reducing block 26, a wedge 27 is provided outside the force-reducing block 26. The wedge 27 is hingedly arranged at a position away from the discharge end 3 of the conveying channel 1, and the wedge 27 is close to the discharge end 3 of the conveying channel 1 and the hydraulic cylinder 28 Connected, the hydraulic cylinder 28 tilts one end of the wedge 27 to stop the concrete precast pile 4 on the conveying channel 1 from continuing to move, so that only one concrete precast pile 4 is provided at the position of the force reducing block 26. When in use, when the last steel mold at the discharge end 3 of the conveying channel 1 reaches the force reducing block 26, the bottom of the penultimate steel mold is limited by the wedge 27, and the hydraulic cylinder 28 extends to lift the wedge 27 and the penultimate Two steel molds prevent the penultimate steel mold from continuing to press the last steel mold, which is convenient for saving effort when lifting the last steel mold; and a small climbing slope is set at the bottom of the force reducing block 26, and a side wall is set When the steel molds are squeezed forward, the last steel mold will be squeezed up the slope to prevent the small steel mold from being pressed by the large steel mold. (During the curing process, the size and model of the steel mold may be different. Extrusion problems may occur when the center of the steel mold is higher than the small steel mold).

It is worth mentioning that the position between the feed end 2 of the conveying channel 1 and the preheating cavity 6 forms a static curing zone, so that the concrete precast pile 4 entering the conveying channel 1 is statically cured.

The above-mentioned specific implementation manners should not be regarded as a limitation to the protection scope of the present invention. For those skilled in the art, any alternative improvements or changes made to the implementation manners of the present invention fall within the protection scope of the present invention.

Anything not described in detail in the present invention is the well-known technique of those skilled in the art.

Claims

A steam curing device for precast concrete piles, which is characterized in that it comprises:

The conveying channel includes a feeding end and a discharging end. The feeding end is located above the discharging end in the vertical direction, so that the conveying channel is arranged in an inclined state, and the conveying channel is suitable for precast concrete piles. Moving from the feeding end to the discharging end, a plurality of precast concrete piles are arranged to abut each other on the conveying channel;

The steam curing unit includes a sealed cavity suitable for the conveying passage to pass through, and the sealed cavity is connected to a steam conveying device, and the steam conveying device conveys steam into the sealed cavity.
The steam curing device for prefabricated concrete piles according to claim 1, characterized in that it comprises at least one preheating cavity, the preheating cavity is arranged between the sealed cavity and the feed end of the conveying channel The preheating cavity and the steam delivery device are connected, and the preheating cavity and the steam circulation device are connected, and the steam circulation device delivers the steam between the sealed cavity and the discharge end of the delivery channel to Inside the preheating cavity.
The steam curing device for precast concrete piles according to claim 2, wherein the sealing cavity and the preheating cavity are provided with a sealing device at a position where the conveying channel passes, and the sealing device is suitable for The prefabricated concrete pile moves along the conveying channel, and cooperates with the prefabricated concrete pile to form the sealed cavity and the preheating cavity in a relatively sealed state.
The steam curing device for precast concrete piles according to claim 3, wherein the sealing device comprises a first sealing part and a second sealing part, and the first sealing part comprises The upper flexible cord, the top end of the flexible cord is connected to the top of the sealed cavity or the preheating chamber, the bottom end of the flexible cord is arranged in abutment with the concrete precast pile; the second sealing part is arranged at the The position between the two ends of the precast concrete pile and the inner wall of the sealed cavity or preheating cavity.
The steam curing device for precast concrete piles according to claim 4, wherein the second sealing part comprises an overflow groove connected to the inner wall of the sealed cavity or the preheating cavity, and the overflow groove is in the vertical The vertical direction is located above the prefabricated concrete pile, the overflow tank is connected to a water pump via a pipeline, the water pump is connected to a reservoir, the reservoir is arranged below the discharge end of the conveying channel, and the water pump It is suitable for transporting the water in the reservoir to the overflow trough, and the water in the overflow trough overflows to form a water curtain; there is a backflow channel connected to the reservoir under the transport channel, and the overflow The overflowing and falling water in the water tank is transported to the reservoir through the return channel.
A steam curing device for precast concrete piles according to claim 1, wherein the conveying channel includes a track suitable for the movement of the precast concrete piles.
The steam curing device for precast concrete piles according to claim 6, characterized in that a bearing member is provided on the track of the conveying channel, and the bearing member is suitable for bearing the precast concrete pile so that the precast concrete pile Move along the track; the bearing member is provided with a pallet for bearing the concrete prefabricated pile, and the bottom of the pallet is provided with rollers matching the track.
The steam curing device for precast concrete piles according to claim 7, wherein the steam delivery device comprises a first air supply pipe arranged in the sealed cavity, the first air supply pipe and external steam The generator is connected, the first air supply pipe is extended and arranged in the sealed cavity and the preheating cavity; the steam circulation device includes a second air supply pipe arranged in the preheating cavity, and the second air supply pipe The air pipe is connected with the air outlet of the exhaust fan, and the air inlet of the exhaust fan is connected between the sealed cavity and the discharge end of the conveying channel.
The steam curing device for precast concrete piles according to claim 8, wherein the conveying channel is provided with a cooling cavity at a position near the top of the discharge end, and the cooling cavity and the sealing cavity are arranged adjacently, The cooling chamber is also provided with the sealing device at a position close to the discharge end of the conveying channel; the air inlet of the exhaust fan is connected to the cooling chamber through a pipeline, so that the sealed chamber enters the steam of the cooling chamber It is delivered to the preheating chamber along the second air supply pipe.
The steam curing device for prefabricated concrete piles according to claim 8 or 9, characterized in that the flexible curtain fabric of each sealing device is provided with a plurality of flexible curtain fabrics along the conveying channel The length direction of the slab is alternately arranged at intervals to form the first sealing portion.