A heat medium directional circulation steam kiln
By setting up multi-stage airbags inside the steam curing kiln to regulate the kiln space, the problem of large vertical temperature difference inside the precast box girder curing shed was solved, achieving temperature uniformity and reducing energy consumption, thus lowering the production cost of precast box girders.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 临海市城发绿色装配式建筑制造有限公司
- Filing Date
- 2025-06-10
- Publication Date
- 2026-06-16
AI Technical Summary
The large vertical temperature difference inside the existing precast box girder curing shed leads to the steam spraying system operating for extended periods, increasing maintenance costs.
Multi-stage air bladders are installed inside the main body of the steam curing kiln. The expansion or contraction of the air bladders adjusts the space inside the kiln, reducing vertical temperature differences. Temperature uniformity is achieved by using temperature sensors and spray devices in conjunction with the control system.
It significantly reduces the vertical temperature difference inside the kiln, lowers energy consumption, and reduces the production cost of precast box girders.
Smart Images
Figure CN224360391U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of steam curing equipment for precast concrete components, specifically to a heat medium directional circulation steam curing kiln. Background Technology
[0002] Precast box girders are a type of reinforced concrete box girder structure. Precast box girders, manufactured on an independent site, can be erected after the substructure is completed using a bridge erection machine, accelerating project progress and saving time. Steam curing of precast box girders is only permitted after pouring and reaching the designed hardening standard. Steam curing allows the precast box girders to quickly hydrate and harden, achieving the designed strength. In assembly line production, a common practice is to move the box girders to a fixed steam curing shed after initial hardening. Existing curing sheds, designed for greater applicability, have large internal spaces. During curing, these sheds experience significant vertical temperature differences (cooler at the bottom and warmer at the top). To maintain the stability and uniformity of the environment within the curing shed, the steam spray system needs to be in place for extended periods, resulting in excessive losses and high curing costs for precast box girders. Utility Model Content
[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a heat medium directional circulation steam curing kiln, which can reduce the vertical temperature difference in the kiln, reduce energy consumption, and reduce the production cost of precast box girders.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a heat medium directional circulation steam curing kiln, comprising a steam curing kiln body, a temperature sensor and a spray device disposed inside the steam curing kiln body, and a control system disposed outside the steam curing kiln body and connected to the temperature sensor and the spray device via circuit. The steam curing kiln further includes an adjustment component; the adjustment component includes an air compressor equipped with an air storage tank and an air bladder connected to the air compressor via a pipeline. The air compressor is disposed outside the steam curing kiln body and connected to the control system via circuit. One end of the air bladder in the length direction is fixedly disposed on the top of the inner side of the steam curing kiln body; a support member is provided inside the steam curing kiln body to assist in the expansion or contraction of the air bladder.
[0005] Preferably, the airbag consists of an airbag body and a plurality of support frames sleeved on the outside of the airbag body and spaced apart; the top of the support frame is provided with a connector that slides with the support member.
[0006] Preferably, the support includes a guide rail fixedly installed on the inner top wall of the main body of the steam curing kiln, and a slide rod fixedly installed below the guide rail and arranged parallel to the guide rail; the adjustment assembly has at least two sets, and is arranged in stages along the vertical direction of the main body of the steam curing kiln, wherein the air bladder near the guide rail is the first-stage air bladder, and its upper end is provided with a slider that slides in cooperation with the guide rail, and the slide rod is located below the first-stage air bladder; the upper end of the air bladder supported by the slide rod is provided with a slip ring that slides in cooperation with the slide rod.
[0007] Preferably, the adjustment component has multiple air bladders, which are arranged in an array along the length of the main body of the steam curing kiln at the same horizontal height.
[0008] Preferably, the overall outline of the multiple airbags in the inflated state is adapted to the inner wall outline of the main body of the steam curing kiln.
[0009] Preferably, the multiple airbags are connected in parallel.
[0010] Preferably, the length directions of the guide rail and the slide rod are both perpendicular to the length direction of the main body of the steam curing kiln.
[0011] Preferably, the airbag body is made of aramid fiber or glass fiber.
[0012] Preferably, the outer surface of the airbag is coated with a hydrophobic coating.
[0013] Preferably, the main body of the steam curing kiln is composed of a steel frame and insulation boards laid inside the steel frame, and protective doors are installed at both ends of the main body of the steam curing kiln along its length.
[0014] Compared with the prior art, the beneficial effects of this utility model are: by setting multi-level airbags on the top of the main body of the steam curing kiln, the steam curing kiln can achieve the purpose of dynamic space compression. Through the expansion or contraction of the airbags, the uniformity of temperature inside the steam curing kiln can be significantly improved, the vertical temperature difference inside the kiln can be reduced, and energy consumption can be reduced. It is also particularly suitable for the curing of high-grade concrete components that are sensitive to temperature differences. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;
[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the steam curing kiln of this utility model;
[0017] Figure 3 This is a schematic diagram of the inner structure of the steam curing kiln of this utility model;
[0018] Figure 4 This is a schematic diagram of the second adjustment component of this utility model.
[0019] In the diagram: 1. Main body of the steam curing kiln; 2. First adjustment component; 3. Second adjustment component; 4. Pipeline; 5. Foundation; 6. Track; 11. Steel frame; 12. Insulation board; 13. Guide rail; 14. Slide rod; 31. Support frame; 32. Airbag body; 33. Slip ring; 34. Inflation port. Detailed Implementation
[0020] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings, so that those skilled in the art can more clearly understand how to practice this utility model. Although this utility model has been described in conjunction with its preferred embodiments, these embodiments are merely illustrative and not intended to limit the scope of this utility model.
[0021] See Figure 1-4 In one embodiment of this utility model, a heat medium directional circulation steam curing kiln includes: a steam curing kiln body 1, an adjustment component, a temperature sensor (not shown in the figure), a spray device (not shown in the figure), a control system, and several pipes 4. The adjustment component includes an air compressor (not shown in the figure) equipped with an air tank and a telescopic air bladder connected to the air compressor via pipes. The air bladder, temperature sensor, and spray device are all located inside the steam curing kiln body 1, while the air compressor and control system are located outside the steam curing kiln body 1. The air compressor, temperature sensor, and spray device are all connected to the control system via electrical wiring. When the steam curing kiln... When the temperature inside the main body 1 is higher or lower than the preset value, the temperature sensor detects the temperature value and then transmits the detected value to the control system. The control system then controls the temperature regulating component and the spray device to regulate the temperature inside the main body 1 of the steam curing kiln. The regulating component is the core of this application and is mainly used to regulate the uniformity of the temperature inside the kiln, especially to regulate and reduce the vertical temperature difference (top and bottom temperature difference) inside the kiln. As for the supporting equipment for temperature regulation, such as the temperature sensor and the spray device, they are all existing technologies. Therefore, this application focuses on describing the regulating component, while the structure and installation method of the temperature sensor and the spray device will not be described in detail here.
[0022] In practice, the main body 1 of the steam curing kiln is fixedly installed on the foundation 5 with the track 6. The main body 1 of the steam curing kiln consists of a steel frame 11 and an insulation board 12 laid on the inner side of the steel frame 11. Both ends of the length direction of the main body 1 of the steam curing kiln are equipped with openable protective doors (not shown in the figure). When the protective doors are closed, a closed space is formed inside the main body 1 of the steam curing kiln. Multiple spaced guide rails 13 are fixedly installed on the top wall inside the main body 1 of the steam curing kiln perpendicular to the length direction of the main body 1 of the steam curing kiln. A support platform is provided on the lower side of the guide rails 13. The support platform consists of multiple spaced sliding rods 14. The length direction of the sliding rods 14 is perpendicular to the length direction of the main body 1 of the steam curing kiln.
[0023] In this embodiment, the adjustment component has a two-stage temperature adjustment function. The adjustment component includes a first adjustment component 2 and a second adjustment component 3 with similar structures. The first adjustment component 2 and the second adjustment component 3 are both located on the top inner side of the main body 1 of the steam curing kiln, and the first adjustment component 2 is located on the upper side of the second adjustment component 3. The air bladder of the first adjustment component 2 is supported by the guide rail 13, and the air bladder of the second adjustment component 3 is supported by the slide rod 14.
[0024] Due to their similar structures, the second adjustment component 3 will be used as an example for explanation:
[0025] The second adjusting component 3 has a telescopic function. The airbag consists of a flexible airbag body 32 and multiple support frames 31 that are sleeved on the outside of the airbag body 32 and act as structural components. The support frames 31 are spaced apart, making the airbag resemble an accordion bellows. One end of the airbag in the length direction, i.e., the right end, is fixedly connected to the main body 1 of the steam curing kiln. The right end of the airbag is also provided with an inflation port 34 connected to the pipe 4. The other end of the pipe 4 is connected to the air compressor. The upper end of the airbag is provided with multiple spaced slip rings 33 that can form a sliding fit with the slide rod 14. Under the support and restriction of the slide rod 14, when the air compressor works to inflate the airbag, the airbag can continuously expand in the length direction perpendicular to the main body 1 of the steam curing kiln. The length of the airbag is not greater than the width of the main body 1 of the steam curing kiln. The airbag body 32 must meet the requirements of high temperature resistance (≥120℃), steam corrosion resistance, and good flexibility. Therefore, the material of the airbag body 32 can be silicone coated aramid fiber or polyimide coated glass fiber, and its thickness can be 0.8mm.
[0026] Furthermore, the second regulating component 3 has three air bladders, which are arranged sequentially along the length of the main body 1 of the steam curing kiln at the same horizontal height. The length and width of the three inflated air bladders match the length and width of the main body 1 of the steam curing kiln. All three air bladders are connected to the air compressor of the second regulating component 3 via pipes, and the air compressor can simultaneously inflate the three air bladders. In addition, the three air bladders are connected in parallel. Compared with series connection, parallel connection has the advantage of higher fault tolerance; when connected in parallel, the failure of one air bladder will not affect the normal operation of the other air bladders. Based on this, in implementation, a distributor needs to be installed between the air compressor and the three air bladders to improve the reliability of the regulating component.
[0027] The first adjustment component 2 has the same structure as the airbag body 32. The top of the first adjustment component 2 is provided with a slider (not shown in the figure) that can slide with the guide rail 13. By using the cooperation of the guide rail 13 and the slider, not only can the airbag of the first adjustment component 2 expand horizontally under restriction, but also the space between the airbag of the first adjustment component 2 and the top wall of the steam curing kiln body 1 can be minimized, reducing the air accumulated at the top of the steam curing kiln body 1.
[0028] When the airbag of the first regulating component 2 is in the inflated state, the airbag expands and presses down, which can reduce the distance between the kiln top and the components, compress the space where hot air accumulates, force the hot air to diffuse downward, and reduce the temperature of the high-temperature zone at the top.
[0029] Therefore, when temperature adjustment is required, the first adjustment component 2 needs to be activated first, and then the second adjustment component 3 located below the first adjustment component 2 is activated, so that the space of the main body 1 of the steam curing kiln is gradually compressed from top to bottom, realizing the modular and segmented adjustment; in addition, the air inside the airbag can act as a heat insulation buffer layer, reducing heat loss from the roof to the outside (especially in winter), thus improving the energy efficiency; in the deflation state, by releasing the airbag, the airbag contracts under the action of its own elastic potential energy, and at this time the space height of the main body 1 of the steam curing kiln increases, thereby avoiding excessive compression of hot air leading to overheating at the bottom.
[0030] In summary, by setting up multi-stage inflatable airbags at the top of the main body 1 of the steam curing kiln, the steam curing kiln can achieve the purpose of dynamic space compression. Through the expansion or contraction of the airbags, the uniformity of temperature inside the steam curing kiln can be significantly improved and the vertical temperature difference inside the kiln can be reduced. It is especially suitable for the curing of high-grade concrete components that are sensitive to temperature differences.
[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A heat medium directional circulation steam curing kiln, comprising a steam curing kiln body (1), a temperature sensor and a spray device disposed inside the steam curing kiln body (1), and a control system disposed outside the steam curing kiln body (1) and connected to the temperature sensor and the spray device via circuit, characterized in that: The steam curing kiln also includes an adjustment component; the adjustment component includes an air compressor equipped with an air tank and an air bladder connected to the air compressor via a pipeline. The air compressor is located outside the main body (1) of the steam curing kiln and is connected to the control system via a circuit. One end of the air bladder is fixedly located at the top of the inner side of the main body (1) of the steam curing kiln. The main body (1) of the steam curing kiln is provided with a support component to assist in the expansion or contraction of the air bladder.
2. The heat medium directional circulation steam curing kiln according to claim 1, characterized in that: The airbag consists of an airbag body (32) and multiple support frames (31) that are sleeved on the outside of the airbag body (32) and spaced apart; the top of the support frame (31) is provided with a connector that slides with the support member.
3. The heat medium directional circulation steam curing kiln according to claim 1, characterized in that: The support includes a guide rail (13) fixedly installed on the inner top wall of the steam curing kiln body (1), and a slide rod (14) fixedly installed below the guide rail (13) and arranged parallel to the guide rail; the adjustment assembly is provided in at least two sets and is arranged in stages along the vertical direction of the steam curing kiln body (1), wherein the air bladder near the guide rail (13) is the first-stage air bladder, and its upper end is provided with a slider that slides in cooperation with the guide rail (13), and the slide rod (14) is located below the first-stage air bladder; the upper end of the air bladder supported by the slide rod (14) is provided with a slip ring that slides in cooperation with the slide rod (14).
4. A heat medium directional circulation steam curing kiln according to claim 1 or 3, characterized in that: The regulating components are provided with multiple air bladders, which are arranged in an array along the length of the main body (1) of the steam curing kiln at the same horizontal height.
5. The heat medium directional circulation steam curing kiln according to claim 4, characterized in that: The overall outline of the multiple airbags in the inflated state is adapted to the inner wall outline of the main body of the steam curing kiln (1).
6. The heat medium directional circulation steam curing kiln according to claim 4, characterized in that: The multiple airbags are connected in parallel.
7. The heat medium directional circulation steam curing kiln according to claim 3, characterized in that: The length directions of the guide rail (13) and slide bar (14) are both perpendicular to the length direction of the main body (1) of the steam curing kiln.
8. The heat medium directional circulation steam curing kiln according to claim 2, characterized in that: The airbag body (32) is made of aramid fiber or glass fiber.
9. The heat medium directional circulation steam curing kiln according to claim 1, characterized in that: The outer surface of the airbag is coated with a hydrophobic coating.
10. A heat medium directional circulation steam curing kiln according to claim 1, characterized in that: The main body (1) of the steam curing kiln consists of a steel frame and an insulation board laid on the inside of the steel frame. Protective doors are installed at both ends of the length of the main body (1).