Vertical shaft type steam curing kiln group

Abstract

The utility model relates to a vertical shaft type steaming kiln group, including steaming kiln and operation platform, its characterized in that, on the operation platform, two or more than two sections are circular or rectangular openings that are matched with the shape and size of the steaming kiln are prefabricated at equal intervals, the foundation pit is excavated on the lower ground of the opening, the steaming kiln includes vertical shaft main body, vertical shaft neck, kiln cover and steam pipeline, the vertical shaft main body is placed in the foundation pit, is equipped with a circle of groove type board as the kiln mouth with the groove mouth upward on the vertical shaft neck upper end, is equipped with the steam pipeline and the horizontal gas distribution pipe with a plurality of air jets in the vertical shaft main body, the top of steam pipeline stretches out from the upper part of vertical shaft main body and is connected with the external gas supply pipeline.Effectively solved the problem that the person is in high altitude operation, and the operator only needs to stand on the ground height or the lower working face and can conveniently operate, is not only safe, but also has improved the work efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of steam curing process for concrete poles, and in particular relates to a vertical shaft steam curing kiln group. Background Technology

[0002] Steam curing of concrete poles is an essential step in pole production. Traditional steam curing kilns are horizontal, consisting of a rectangular pit dug underground, surrounded by concrete walls, with steam pipes inside and a top cover. For high-volume production, multiple kilns need to be installed side-by-side. These kilns occupy a large area, require long crane travel distances, consume high energy, and have low production efficiency.

[0003] To address the aforementioned issues, Chinese patent CN110625765A discloses a vertical steam curing kiln that occupies a small area, has a short crane travel distance, and high working efficiency. The kiln includes several vertical U-shaped cross-section walls arranged in a combination, a side door assembly at the vertical opening of each vertical U-shaped cross-section wall, a cover plate assembly at the top of each vertical U-shaped cross-section wall, and an outwardly protruding mold suspension beam inside each vertical U-shaped cross-section wall. However, this structure has two drawbacks in practical applications: First, the kiln body is located above ground, while the operating platform needs to be located on top of the kiln, meaning that people need to work at height, which not only poses safety hazards but also makes it difficult for people to go up and down the high platform. Second, the kiln door is on the side, and because the kiln door is relatively high, it is necessary to ensure that both sides are sealed from top to bottom during the closing and sealing process, which is also quite troublesome. Both of these aspects will adversely affect production efficiency. In addition, the mold suspension beam is set inside each vertical U-shaped section wall. When hanging the mold, personnel need to look into the kiln to observe the position of the suspension beam and reach into the kiln to operate, which is inconvenient for observation and operation. Moreover, the temperature inside the kiln is high, which is unbearable. Summary of the Invention

[0004] The purpose of this utility model is to provide a vertical shaft steam curing kiln group with a small footprint, short crane travel distance, and high working efficiency.

[0005] The objective of this utility model is achieved through the following technical solution: This utility model discloses a vertical shaft steam curing kiln group, comprising a steam curing kiln and an operating platform. The operating platform is positioned flush with or above the ground plane. Two or more openings with circular or rectangular cross-sections, matching the shape and size of the steam curing kiln, are prefabricated at equal intervals on the operating platform, forming pedestrian passages between and around the steam curing kilns. A foundation pit larger than or equal to the opening is excavated in the ground below the opening of the operating platform. The steam curing kiln includes a vertical shaft body with a circular or rectangular cross-section, a shaft neck, a kiln cover, and steam pipes. The entire vertical shaft body is placed within the foundation pit or partially located between the ground and the operating platform. The shaft neck is the portion of the shaft body higher than the operating platform. A grooved plate with an upward-facing groove is provided at the upper end of the shaft neck as the kiln opening. The grooved plate consists of a web, inner wing plates, and outer wing plates. The kiln cover consists of a top surface that matches the size of the vertical shaft neck and vertical edges that extend downward around the top surface. The vertical edges of the kiln cover are inserted into the grooved plate and contact the upper surface of the web plate. The inner wing plate is placed on the inner side of the vertical shaft neck as a mold suspension edge, and the hook-shaped hanging points on the mold are directly suspended on it. The outer wing plate is placed on the outer side of the vertical shaft neck as an air baffle. The steam pipe is vertically installed on the inner wall of the shaft body. At the bottom of the steam pipe, there is a horizontal gas distribution pipe with multiple jet nozzles. The top of the steam pipe extends from the upper part of the shaft body and connects to the external gas supply pipeline. Two or more steam curing kilns are arranged together to form a shaft-type steam curing kiln group.

[0006] Preferably, the depth of the main shaft body is greater than 9m, and the neck of the main shaft body with a circular cross-section is a circular cross-section wall extending vertically upward from the main shaft body wall. The neck of the main shaft body with a rectangular cross-section is a rectangular cross-section wall extending vertically upward from the main shaft body wall. Alternatively, the outer two ends of the neck of the rectangular main shaft body located outside the shaft-type steam curing kiln group are walls extending vertically upward from the main shaft body wall. The sidewall of each adjacent neck is a wall that bends inward from the main shaft body and then extends upward.

[0007] Preferably, the inner and outer wing plates of the grooved plate are wing plates of equal height or the inner wing plate is lower than the outer wing plate in height, and the thickness of the inner wing plate is ≥ the thickness of the outer wing plate.

[0008] Preferably, a rubber sealing gasket is provided at the contact point between the upper surface of the web of the trough plate and the vertical edge of the kiln cover, or water is added to the trough of the trough plate to form a water seal.

[0009] Preferably, the height of the vertical edge of the kiln cover is greater than the height of the outer wing plate of the trough plate.

[0010] Preferably, a heat insulation layer is provided on the top surface of the kiln cover and the lower part of the operating platform, and a heat insulation layer is also provided on the outer side of the neck of the shaft.

[0011] Preferably, the height of the shaft neck is 0.5m to 1.3m, the diameter of the circular shaft neck cross-section is 2 to 4m, and the side length of the rectangular shaft neck cross-section is 3 to 8m and the width is 1 to 2.5m.

[0012] Preferably, when the main body of the steam curing kiln shaft is circular, the width of the personnel passage between each steam curing kiln is ≥0.4m at its narrowest point; when the main body of the steam curing kiln shaft is rectangular, the width of the personnel passage between the long sides of adjacent steam curing kilns is ≥0.6m.

[0013] Preferably, a horizontal steam distribution pipe is also provided in the middle of the steam pipe to increase the uniformity of steam in the kiln.

[0014] Preferably, at least one horizontal support beam is provided on the side wall of the main body of the shaft, and the distance between the inner wing plate and the support beam is greater than 2 meters, in order to control the verticality of the mold when it is suspended. The cross section of the support beam is with a bevel or a curved surface.

[0015] Advantages of this utility model: This utility model of a vertical shaft steam curing kiln group occupies a small area, and people can operate on the ground or a low working surface. There is no need to open or close the side door. When hanging the mold, the personnel only need to observe from the outside. The operators only operate from the top of the kiln. Compared with the existing technology, it has been optimized in many aspects, resulting in higher work efficiency and safer operation. Attached Figure Description

[0016] Figure 1 A vertical shaft steam curing kiln assembly consisting of two parallel rectangular shaft bodies is shown, along with a top view of the kiln cover. Figure 2 for Figure 1 Section 1-1; Figure 3 for Figure 2 The enlarged view of point A shows that the sealing method is rubber sealing. Figure 4 A vertical shaft steam curing kiln assembly consisting of three parallel rectangular shaft bodies is shown, along with a top view of the kiln cover. Figure 5 for Figure 4 Section 2-2 shows that the sidewall of each adjacent shaft neck is a vertical wall that bends inward from the main body of the shaft and then extends upward.

[0017] Figure 6 for Figure 5 The enlarged view of point B shows that the sealing method is water seal.

[0018] Figure 7The image shows a vertical shaft steam curing kiln assembly consisting of three circularly cross-sectional shaft bodies arranged in a triangular pattern, with a top view of the kiln cover. Figure 8 for Figure 7 Section 3-3 shows that the neck of the shaft extends vertically upwards from the main wall of the shaft. The circular cross-section vertical wall, and a horizontal gas distribution pipe is also installed in the middle of the steam pipe; Figure 9 for Figure 8 The enlarged view of point C shows that the sealing method is water seal; In the diagram: 1. Operating platform, 2. Shaft body, 3. Shaft neck, 4. Web plate, 5. Inner wing plate, 6. Outer wing plate, 7. Thermal insulation layer, 8. Top surface of kiln cover, 9. Vertical edge of kiln cover, 10. Steam pipe, 11. Horizontal gas distribution pipe, 12. Support beam, 20. Mold, 21. Hook-shaped hanging point, 22. Rubber sealing gasket, 23. Water seal. Detailed Implementation

[0019] To more clearly illustrate the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] like Figure 1-9 As shown, the vertical shaft steam curing kiln group of this utility model includes a steam curing kiln and an operating platform 1. The operating platform 1 is characterized by being flush with or higher than the ground plane. Two or more openings with circular or rectangular cross-sections, matching the shape and size of the steam curing kiln, are prefabricated at equal intervals on the operating platform 1, forming pedestrian passages between and around the steam curing kilns. A foundation pit larger than or equal to the opening is excavated in the ground below the opening of the operating platform 1. The steam curing kiln includes a vertical shaft body 2 with a circular or rectangular cross-section, a shaft neck 3, a kiln cover, and steam pipes 10. The vertical shaft body 2 is entirely placed in the foundation pit or partially located between the ground and the operating platform. The shaft neck 3 is the portion of the shaft body higher than the operating platform. A grooved plate with an upward-facing groove is provided at the upper end of the shaft neck 3 as the kiln opening. The diameter of the circular cross-section shaft neck 3 is 2 mm. The grooved plate, ranging from m to 4m, is composed of a web plate 4, an inner wing plate 5, and an outer wing plate 6. The kiln cover consists of a top surface 8 that matches the dimensions of the shaft neck and vertical edges 9 extending downwards around the top surface 8. The vertical edges 9 are inserted into the grooved plate and contact the upper surface of the web plate 4. The height of the vertical edges 9 is greater than the height of the outer wing plate of the grooved plate. The inner wing plate 5 is placed inside the shaft neck 3, and the outer wing plate 6 is placed outside the shaft neck 3 as a baffle plate. The inner wing plate 5 and the outer wing plate 6 of the grooved plate are of equal height or the inner wing plate 5 is lower than the outer wing plate 6. The inner wing plate 5 also serves as a mold suspension point, directly suspended from the hook-shaped hanging point 21 on the mold 20. The outer wing plate 6 serves as a baffle plate to prevent steam or water from splashing outwards and scalding surrounding personnel. The steam pipe 10 is vertically installed on the inner wall of the shaft body 2. A horizontal air distribution pipe 11 with multiple air nozzles is provided at the bottom of the steam pipe 10. The top of the steam pipe 10 extends from the upper part of the shaft body 2 and connects to the external air supply pipeline. Two or more steam curing kilns are arranged together to form a shaft-type steam curing kiln group.

[0021] This utility model Figures 1-3 The diagram shows two parallel rectangular shaft bodies 2, forming a vertical shaft steam curing kiln assembly. A top view of the kiln cover is also shown. The shaft neck 3 is a rectangular cross-section wall extending vertically upwards from the shaft body wall, with an external heat insulation layer 7. The operating platform is flush with the ground. The entire shaft body is placed inside the foundation pit. The inner wing 5 and outer wing 6 of the grooved plate are at the same height. The sealing method involves a rubber sealing gasket 22 at the contact point between the upper plane of the web 4 of the grooved plate and the vertical edge 9 of the kiln cover. Both the top surface 8 and the vertical edge 9 of the kiln cover are equipped with heat insulation layers 7. The side length of the rectangular shaft neck 3 is 3-8m and the width is 1-2.5m. The width of the personnel passage between the two steam curing kilns is ≥0.6m.

[0022] Figures 4-6 The diagram shows a vertical shaft steam curing kiln assembly consisting of three parallel rectangular shaft bodies 2, and a top view of the kiln cover. The outer two ends of the shaft neck 3 are vertical walls extending vertically upwards from the shaft body walls, while the side walls of each adjacent shaft neck 3 are vertical walls that bend inwards from the shaft body 2 and then extend upwards. The operating platform is set above the ground, the shaft body is placed in the foundation pit, and the rest is located between the ground and the operating platform. The inner wing 5 and outer wing 6 of the grooved plate are such that the inner wing 5 is lower than the outer wing 6. The sealing method is to add water into the groove of the grooved plate to form a water seal 23. The top surface 8 of the kiln cover is provided with a heat insulation layer 7, while the vertical edge 9 of the kiln cover is not provided with a heat insulation layer.

[0023] Figures 7-9This illustration shows an embodiment of a shaft-type steam curing kiln group composed of three circular shaft bodies arranged in a triangular combination. The operating platform 1 is set above the ground. The inner wing plate 5 and the outer wing plate 6 of the grooved plate are wing plates of equal height or the inner wing plate 5 is lower than the outer wing plate 6. ， The figure shows an embodiment in which the inner wing plate 5 is lower than the outer wing plate 6. Water is added to the groove of the groove plate to form a water seal 23. A horizontal gas distribution pipe 11 is also set in the middle of the steam pipe 10. The narrowest width of the personnel passage between each steam curing kiln is ≥0.4m.

[0024] To ensure the strength of the suspension edge, the thickness of the inner wing plate 5 is equal to the thickness of the outer wing plate 6.

[0025] To ensure that the mold is in a vertical position when suspended, this utility model can horizontally install a support beam 12 on the side wall of the main body of the shaft. The distance between the inner wing plate 5 and the support beam 12 is greater than 2 meters. The cross section of the support beam 12 is with a bevel or an arc surface to prevent the mold from getting stuck when it rises or falls.

[0026] The shaft body of this utility model has a shaft wall made of steel plate or concrete. The shaft neck of the shaft body with a circular cross-section is a circular cross-section wall extending vertically upward from the shaft body wall. The diameter of the circular cross-section of the shaft neck 3 is 2-4m. In order to prevent the influence of heat radiation on personnel, the height of the kiln cover edge 9 is greater than the height of the outer wing plate. A heat insulation layer 7 is provided on the top surface of the kiln cover and the lower part of the operating platform. A heat insulation layer 7 is also provided on the outer side of the shaft neck below the outer wing plate. The heat insulation layer 7 can be made of heat-resistant insulation materials such as foam board and glass wool.

[0027] This utility model of a vertical shaft steam curing kiln effectively solves the problem of people operating at height. Operators can operate conveniently by standing at ground level or a lower working surface, which is not only safe but also improves work efficiency.

Claims

1. A vertical shaft-type steam curing kiln assembly, comprising a steam curing kiln and an operating platform, characterized in that: The operating platform is set at or above the ground level. Two or more openings with circular or rectangular cross-sections that match the shape and size of the steam curing kiln are prefabricated at equal intervals on the operating platform, so that the operating platform forms a pedestrian passage between the steam curing kilns and around the steam curing kiln. A foundation pit larger than or equal to the opening is excavated in the ground below the opening of the operating platform. The steam curing kiln includes a vertical shaft body with a circular or rectangular cross-section, a vertical shaft neck, a kiln cover and steam pipes. The entire vertical shaft body is placed in the foundation pit or partly located between the ground and the operating platform. The vertical shaft neck is the part of the shaft body that is higher than the operating platform. A grooved plate with the groove opening facing upward is provided at the upper end of the vertical shaft neck as the kiln opening. The grooved plate is composed of a web plate, an inner wing plate and an outer wing plate. The kiln cover consists of a top surface that matches the size of the vertical shaft neck and vertical edges that extend downward around the top surface. The vertical edges of the kiln cover are inserted into the grooved plate and contact the upper surface of the web plate. The inner wing plate is placed on the inner side of the vertical shaft neck as a mold suspension edge, and the hook-shaped hanging points on the mold are directly suspended on it. The outer wing plate is placed on the outer side of the vertical shaft neck as an air baffle. The steam pipe is vertically installed on the inner wall of the shaft body. At the bottom of the steam pipe, there is a horizontal gas distribution pipe with multiple jet nozzles. The top of the steam pipe extends from the upper part of the shaft body and connects to the external gas supply pipeline. Two or more steam curing kilns are arranged together to form a shaft-type steam curing kiln group.

2. The vertical shaft steam curing kiln group according to claim 1, characterized in that: The depth of the main body of the shaft is greater than 9m. The neck of the main body of the shaft with a circular cross-section is a circular cross-section wall that extends vertically upward from the main body wall. The neck of the main body of the shaft with a rectangular cross-section is a rectangular cross-section wall that extends vertically upward from the main body wall. Alternatively, the outer two ends of the neck of the rectangular main body located outside the shaft-type steam curing kiln group are walls that extend vertically upward from the main body wall. The side wall of each adjacent neck is a wall that bends inward from the main body of the shaft and then extends upward.

3. The vertical shaft steam curing kiln group according to claim 1, characterized in that: The inner and outer wing plates of the grooved plate are wing plates of equal height or the inner wing plate is lower than the outer wing plate in height, and the thickness of the inner wing plate is greater than or equal to the thickness of the outer wing plate.

4. The vertical shaft steam curing kiln group according to claim 3, characterized in that: A rubber sealing gasket is provided at the contact point between the upper surface of the web of the trough plate and the vertical edge of the kiln cover, or water is added to the trough of the trough plate to form a water seal.

5. The vertical shaft steam curing kiln group according to claim 1, characterized in that: The height of the vertical edge of the kiln cover is greater than the height of the outer wing plate of the trough plate.

6. The vertical shaft steam curing kiln group according to claim 1, characterized in that: A heat insulation layer is provided on the top surface of the kiln cover and the lower part of the operating platform, and a heat insulation layer is also provided on the outer side of the neck of the shaft.

7. The vertical shaft steam curing kiln group according to claim 1, characterized in that: The height of the shaft neck is 0.5m to 1.3m. If the shaft neck cross-section is circular, the diameter is 2 to 4m. If the shaft neck cross-section is rectangular, the side length is 3 to 8m and the width is 1 to 2.5m.

8. The vertical shaft steam curing kiln group according to claim 1, characterized in that: When the main body of the steam curing kiln shaft is circular, the narrowest width of the personnel passage between each steam curing kiln is ≥0.4m. When the main body of the steam curing kiln shaft is rectangular, the width of the personnel passage between the long sides of adjacent steam curing kilns is ≥0.6m.

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