Steam cavity structure of vertical steam rice bran machine

Abstract

The utility model provides a kind of steam cavity structure of vertical steaming machine, belong to the technical field of steaming machine, including multiple cavity section units of layer-by-layer butt joint, center steam inlet pipe and top cover;The inner cavity of each cavity section unit is formed into a section of steam cavity, top cover is equipped with feed pipe and exhaust pipe, center steam inlet pipe is connected in top cover and is downward layer-by-layer and is arranged in the center of each section of steam cavity, and there are several circles of steam exhaust hole in the interval distribution on center steam inlet pipe;The outer periphery of cavity section unit has mutually isolated steam inlet ring cavity and preheating ring cavity, steam inlet ring cavity is communicated with steam cavity by several steam inlets which are distributed on its cavity wall in ring direction;Preheating ring cavity is used to pass into high-temperature steam before steam inlet ring cavity to preheat steam cavity;Steam inlet ring cavity and center steam inlet pipe are used to pass into high-temperature steam after steam cavity preheating.The steam cavity structure of vertical steaming machine provided by the utility model can preheat steam cavity before steaming rice, and steam is simultaneously introduced from the outer periphery and center of steam cavity, so as to improve the efficiency and quality of material clear steaming.

Description

Technical Field

[0001] This utility model belongs to the technical field of rice bran steaming machines, specifically relating to the steaming chamber structure of a vertical rice bran steaming machine. Background Technology

[0002] Vertical rice bran steamers are used to steam rice bran and husks to sterilize and soften them, preparing them for subsequent brewing processes. Their working principle involves high-temperature steam flowing upwards through the steaming chamber to penetrate the material and complete the steaming process. However, in vertical steamers, the temperature of the steam gradually decreases as it rises through the material, significantly limiting the height of the material within the steaming chamber. If the material is too high, it can lead to over-steaming at the bottom or under-steaming at the top, affecting the uniformity of steaming and consequently the quality. Therefore, the steaming efficiency and quality of vertical rice bran steamers are mutually influential, which is a major factor restricting their further widespread application and necessitates finding solutions. Utility Model Content

[0003] This utility model embodiment provides a steaming chamber structure for a vertical rice bran steamer, aiming to simultaneously improve the material steaming efficiency and quality of the vertical rice bran steamer.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a steaming chamber structure for a vertical steaming machine is provided, comprising multiple chamber units that are sealed and connected layer by layer, a central steam inlet pipe, and a top cover covering the top chamber unit; the inner cavity of each chamber unit is formed as a steaming chamber, the top cover is provided with a feed pipe and an exhaust pipe, the central steam inlet pipe is connected to the top cover and passes through the center of each steaming chamber layer by layer downwards, and the central steam inlet pipe has several rings of exhaust holes distributed at intervals above and below; The outer periphery of the cavity unit has mutually isolated steam inlet annular cavity and preheating annular cavity. The steam inlet annular cavity is connected to the steam chamber through several steam inlet holes distributed circumferentially on its cavity wall. The preheating annular cavity is used to introduce high-temperature steam before the steam inlet annular cavity to preheat the steam chamber. The steam inlet annular cavity and the central steam inlet pipe are used to introduce high-temperature steam after the steam chamber has been preheated.

[0005] In one possible implementation, the cavity unit includes: Inner shell, used to enclose the cavity walls of the steaming chamber; The upper flange and the lower flange are respectively fitted and fixed to the upper and lower ends of the inner shell; The insulation shell is fixedly connected to the upper flange and the lower flange at its upper and lower ends, respectively. The insulation shell is wrapped around the outer periphery of the inner shell and forms a sandwich space between the inner shell and the inner shell. An isolation ring is fitted around the outer periphery of the inner shell and is fixedly connected to the insulation shell. The isolation ring divides the interlayer space into an inlet annular cavity and a preheating annular cavity.

[0006] For example, the inner shell has fish-scale-shaped holes protruding towards the inside of the steam chamber as steam inlets, and the steam outlet extends obliquely downward from the inner wall of the central steam inlet pipe to the outer wall.

[0007] In some embodiments, the cavity unit further includes a shell, which is wrapped around the outer periphery of the insulation shell and forms an insulation interlayer between the insulation shell and the insulation shell, and the upper and lower ends of the shell are fixedly connected to the upper flange and the lower flange, respectively.

[0008] For example, the insulation shell includes an upper shell and a lower shell that are fixedly connected to the upper and lower surfaces of the insulating ring, respectively. The insulating ring passes through the insulation interlayer between the upper shell and the lower shell and is fixedly connected to the outer shell.

[0009] For example, the insulation interlayer is filled with insulation material.

[0010] In one possible implementation, the outer casing is provided with a first steam pipe and a second steam pipe in its radial direction. The first steam pipe is sealed into the steam inlet annular cavity, and the second steam pipe is sealed into the preheating annular cavity. The first steam pipe is provided with a first steam valve, and the second steam pipe is provided with a second steam valve.

[0011] In some embodiments, each steam chamber is equipped with a temperature sensing element.

[0012] For example, each cavity unit is provided with multiple observation holes at intervals along its circumference, each observation hole is connected to the steaming cavity, and each observation hole is encapsulated with a transparent panel.

[0013] In some embodiments, a cleaning brush is rotatably connected to the side of the transparent panel facing the steam chamber, and the cleaning brush has an operating handle that seals through the steam chamber.

[0014] The beneficial effects of the steaming chamber structure of the vertical steaming machine provided by this utility model are as follows: Compared with the prior art, the steaming chamber structure of the vertical steaming machine of this utility model is formed by connecting multiple chamber units layer by layer. The inner cavity of each chamber unit is formed as a steaming chamber, thus forming an overall chamber for steaming materials. Each chamber unit is equipped with a steam inlet ring cavity. By introducing high-temperature steam into the steam inlet ring cavity, the high-temperature steam can enter the edge area of ​​the steaming chamber through the circumferentially arranged steam inlet holes. On this basis, the high-temperature steam also enters the central area of ​​the steaming chamber through the central steam inlet pipe and the various ring exhaust holes. This enables the high-temperature steam to spread bidirectionally from the edge to the center and from the center to the edge in the steaming chamber, and the high-temperature steam rises as a whole based on the exhaust port set on the top cover. Therefore, the steaming process not only ensures the uniformity of contact between the material and the high-temperature steam, and ensures the consistency of the steaming degree of the material in different areas, thereby improving the steaming quality of the material; it can also solve the problem of the steaming temperature drop in the upper steaming chamber, thereby increasing the overall height of the steaming chamber and increasing the feed amount while ensuring the steaming quality, thus improving the material steaming efficiency of the vertical steaming machine.

[0015] By setting a preheating ring cavity around the outer periphery of the steaming chamber, the steaming chamber can be preheated by the high-temperature steam entering the preheating ring cavity before the high-temperature steam is introduced into the steaming chamber. This can avoid the condensation phenomenon caused by the temperature difference after the high-temperature steam is introduced into the steaming chamber, thereby avoiding the impact of condensate on the steaming quality of the material and helping to further improve the steaming quality of the material in the vertical steaming machine. Attached Figure Description

[0016] Figure 1 A three-dimensional structural diagram of the steaming chamber structure of the vertical rice bran steamer provided in the embodiments of this application; Figure 2 A cross-sectional view of the steaming chamber structure of the vertical rice bran steamer provided in this embodiment of the application; Figure 3 This is a three-dimensional structural diagram of the cavity unit used in the embodiment of this utility model; Figure 4 This is a cross-sectional view of the cavity unit used in the embodiment of the present invention. Figure 5 This is a three-dimensional structural diagram of the top cover used in an embodiment of the present utility model; Figure 6 This is a three-dimensional structural diagram of the perspective panel used in the embodiment of this utility model; Figure 7 This is a schematic diagram of the steam inlet hole opened on the steam inlet ring cavity in an embodiment of this utility model; Figure 8 This is a schematic diagram of the exhaust hole opened on the central steam inlet pipe in an embodiment of this utility model.

[0017] In the diagram: 10. Cavity unit; 100. Steam chamber; 101. Steam inlet ring chamber; 102. Preheating ring chamber; 103. Steam inlet hole; 104. Insulation jacket; 11. Inner shell; 12. Upper flange; 13. Lower flange; 14. Insulation shell; 141. Upper shell; 142. Lower shell; 15. Isolation ring; 16. Outer shell; 17. Transparent panel; 18. Cleaning brush; 181. Operating handle; 20. Central steam inlet pipe; 21. Steam outlet hole; 30. Top cover; 31. Feed pipe; 32. Exhaust pipe; 40. First steam pipe; 41. First steam valve; 50. Second steam pipe; 51. Second steam valve; 60. Temperature measuring element. Detailed Implementation

[0018] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] It should be noted that when an element is referred to as being "set on" or "connected to" another element, it can be directly on or indirectly on the other element. It should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0020] Please refer to the following: Figures 1 to 8 The steaming chamber structure of the vertical steaming rice bran machine provided by this utility model is described below. The steaming chamber structure of the vertical steaming rice bran machine includes multiple chamber section units 10 that are sealed and connected layer by layer, a central steam inlet pipe 20, and a top cover 30 covering the top chamber section unit 10; the inner cavity of each chamber section unit 10 is formed as a section steaming chamber 100, and the top cover 30 is provided with a feed pipe 31 and an exhaust pipe 32. The central steam inlet pipe 20 is connected to the top cover 30 and passes through the center of each section steaming chamber 100 layer by layer downwards. The central steam inlet pipe 20 has several rings of exhaust holes 21 distributed vertically at intervals. The outer periphery of the cavity unit 10 has a mutually isolated steam inlet annular cavity 101 and a preheating annular cavity 102. The steam inlet annular cavity 101 is connected to the steam chamber 100 through a plurality of steam inlet holes 103 distributed circumferentially on its cavity wall. The preheating annular cavity 102 is used to introduce high-temperature steam before the steam inlet annular cavity 101 to preheat the steam chamber 100. The steam inlet annular cavity 101 and the central steam inlet pipe 20 are used to introduce high-temperature steam after the steam chamber 100 has been preheated.

[0021] It should be noted that the structure of multiple cavity units 10 connected together in this embodiment is intended to reduce processing difficulty and cost. The connection sealing between adjacent cavity units 10 can be ensured by clamping a sealing gasket. Considering that the preheating of the steaming chamber 100 is mainly for its cavity wall, the preheating annular cavity 102 and the steaming chamber 100 can adopt a shared wall structure. When high-temperature steam enters the preheating annular cavity 102, it can heat the cavity wall of the steaming chamber 100.

[0022] It should be explained that, in order to improve preheating efficiency, in this embodiment, the height of the preheating annular cavity 102 is greater than the height of the steam inlet annular cavity 101, or in other words, the preheating annular cavity 102 occupies most of the outer periphery of the cavity section unit 10, thereby ensuring the direct heating area of ​​the steam chamber 100 by the high-temperature steam in the preheating annular cavity 102, thereby improving the preheating efficiency; the height of the steam inlet annular cavity 101 only needs to meet the requirement of arranging one or more rings of steam inlet holes 103.

[0023] It should be noted that the top cover 30 can be a conical top structure or a flat top structure, with a conical top structure being preferred here. The feed pipe 31 is preferably located at the center of the top cover 30, and the exhaust pipe 32 can be one or more located on the side of the feed pipe 31. The exhaust pipe 32 can be a hollow pipe structure. As high-temperature steam continuously enters the steaming chamber 100, the high-temperature steam naturally rises and is discharged through the exhaust pipe 32. This avoids the situation where the amount of high-temperature steam in the upper steaming chamber 100 is insufficient due to active suction by the exhaust pipe 32, thus ensuring that the material in the upper steaming chamber 100 has sufficient and uniform contact with the high-temperature steam.

[0024] The vertical steaming machine provided in this embodiment can operate in a continuous steaming mode, where the material is continuously fed into the steaming chamber 100 through the feed pipe 31 and continuously discharged from the bottom steaming chamber 100. The steaming process is completed as the material passes through each section of the steaming chamber 100 from top to bottom. In this method, the steaming degree may be low in the initial steaming stage due to insufficient time for the material to pass through the steaming chamber 100. Once the material fills each section of the steaming chamber 100 and the operation becomes stable, the steaming time can be made consistent. Therefore, the continuous steaming method is more suitable for steaming large batches of material. Of course, for small batches of material, an interval quantitative steaming method can also be used. That is, before steaming, the material is first filled into each section of the steaming chamber 100 through the feed pipe 31, and then timed steaming is performed. After steaming is completed, all the material is discharged, and then the process is repeated for the next batch of material.

[0025] Taking continuous steaming operation as an example, before steaming begins, high-temperature steam is first introduced into the preheating ring cavity 102 of each chamber unit 10 to preheat the cavity wall of the steaming chamber 100. During the preheating time, material is added to the steaming chamber 100 through the feed pipe 31 via an elevator or other feeding device, which saves time and improves efficiency. After preheating is completed, the steam supply to the preheating ring cavity 102 is stopped, and high-pressure steam is simultaneously introduced into the steam inlet ring cavity 101 and the central steam inlet pipe 20. The high-pressure steam enters the edge area of ​​the steaming chamber 100 through the steam inlet holes 103 of each layer of steam inlet ring cavity 101, and enters the central area of ​​the steaming chamber 100 through the exhaust holes 21 of each ring of the central steam inlet pipe 20. The high-pressure steam in the edge area and the central area forms a bidirectional cross-spread. At the same time, the high-pressure steam also penetrates the material upward in the steaming chamber 100 until it reaches the top cover 30 and is discharged through the exhaust pipe 32. In this process, the bottom steam chamber 100 controls the continuous discharge speed, while the feeding speed of the feed pipe 31 is consistent with the discharge speed. This allows control over the time it takes for the material to pass through each section of the steam chamber 100, and ensures that the steaming degree of all materials entering afterward is consistent, except in the initial stage.

[0026] Compared with the prior art, the steaming chamber structure of the vertical steaming machine provided in this embodiment is composed of multiple chamber segment units 10 connected layer by layer. The inner cavity of each chamber segment unit 10 forms a section of steaming chamber 100, which is combined to form an overall chamber for steaming materials. Each chamber segment unit 10 is equipped with a steam inlet ring cavity 101. By introducing high-temperature steam into the steam inlet ring cavity 101, the high-temperature steam can enter the edge area of ​​the steaming chamber 100 through the circumferentially arranged steam inlet holes 103. On this basis, the high-temperature steam also enters the central area of ​​the steaming chamber 100 through the central steam inlet pipe 20 and the various ring exhaust holes 21. This enables the high-temperature steam to spread bidirectionally from the edge to the center and from the center to the edge in the steaming chamber 100, and the high-temperature steam rises as a whole based on the exhaust port set in the top cover 30. Therefore, the steaming process not only ensures the uniformity of contact between the material and the high-temperature steam, and ensures the consistency of the steaming degree of the material in different areas, thereby improving the steaming quality of the material; it can also solve the problem of the steaming temperature drop in the high-level steaming chamber 100, thereby increasing the overall height of the steaming chamber 100 and increasing the feed amount while ensuring the steaming quality, thus improving the material steaming efficiency of the vertical steaming machine.

[0027] By setting a preheating ring cavity 102 around the outer periphery of the steaming chamber 100, the steaming chamber 100 can be preheated by the high-temperature steam entering the preheating ring cavity 102 before the high-temperature steam is introduced into the steaming chamber 100. This can avoid the condensation phenomenon caused by the temperature difference after the high-temperature steam is introduced into the steaming chamber 100, thereby avoiding the impact of condensate on the steaming quality of the material and helping to further improve the steaming quality of the material in the vertical steaming machine.

[0028] It should be noted that, considering that the high-pressure steam entering the steam chamber 100 of the lower chamber unit 10 can have a steaming effect on the material in the upper steam chamber 100 after rising, in order to improve the consistency of the steaming degree of the material in each steam chamber 100, the steam intake of each steam inlet ring chamber 101 distributed from bottom to top gradually decreases, and the spacing between each ring of exhaust holes 21 distributed on the central steam inlet pipe 20 gradually increases from bottom to top. This can form a steam intake state in each steam chamber 100 that gradually decreases from bottom to top, thereby ensuring the uniformity of the steaming degree of the material.

[0029] In some embodiments, see Figure 3 and Figure 4 The cavity unit 10 includes an inner shell 11, an upper flange 12, a lower flange 13, an insulation shell 14, and an isolation ring 15. The inner shell 11 is used to enclose the cavity wall of the steaming chamber 100. The upper flange 12 and the lower flange 13 are respectively sleeved and fixed to the upper and lower ends of the inner shell 11. The upper and lower ends of the insulation shell 14 are respectively fixedly connected to the upper flange 12 and the lower flange 13. The insulation shell 14 is wrapped around the outer periphery of the inner shell 11 and forms an interlayer space with the inner shell 11. The isolation ring 15 is sleeved around the outer periphery of the inner shell 11 and fixedly connected to the insulation shell 14. The isolation ring 15 divides the interlayer space into a steam inlet ring cavity 101 and a preheating ring cavity 102.

[0030] The upper flange 12 and lower flange 13 are used to connect and fix each cavity unit 10. The upper flange 12 of the top cavity unit 10 is used to fix the top cover 30, and the lower flange 13 of the bottom cavity unit 10 is used to fix the discharge mechanism. The inner shell 11 and the insulation shell 14 form a sandwich space on the one hand, and connect the upper flange 12 and the lower flange 13 on the other hand. The insulating ring 15 serves to separate the sandwich space to obtain the steam inlet annular cavity 101 and the preheating annular cavity 102, and also provides radial support between the inner shell 11 and the insulation shell 14, thereby improving the overall structural strength.

[0031] It should be noted that, in order to reduce the risk of blockage caused by material entering the steam inlet 103 and steam outlet 21, please refer to [the relevant documentation / reference]. Figure 7 and Figure 8 The inner shell 11 has fish-scale holes protruding towards the inside of the steam chamber 100 as steam inlet holes 103, and the steam outlet 21 extends obliquely downward from the inner wall of the central steam inlet pipe 20 to the outer wall.

[0032] The fish-scale holes are structurally designed with raised obstructions on the upper side of the hole body. This prevents material from entering the steam inlet 103 during its descent within the steam chamber 100. Simultaneously, the raised obstructions create a certain steam intake space near the steam inlet 103, improving steam flow. The central steam inlet pipe 20 could also be equipped with fish-scale holes as exhaust holes 21. However, considering the relatively high difficulty in creating fish-scale holes on the central steam inlet pipe 20, oblique holes can be used as exhaust holes 21. This also prevents falling material from entering the exhaust hole 21 and causing blockage, thus ensuring smooth material flow from the central steam inlet pipe 20 into the steam chamber 100.

[0033] As a modified embodiment of the cavity unit 10 described above, please refer to Figure 4 The cavity unit 10 also includes an outer shell 16, which is wrapped around the outer periphery of the insulation shell 14 and forms an insulation interlayer 104 between the insulation shell 14. The upper and lower ends of the outer shell 16 are fixedly connected to the upper flange 12 and the lower flange 13, respectively.

[0034] By setting the outer shell 16, the overall structural strength can be improved, and an insulation layer 104 can be formed between the outer shell 16 and the insulation shell 14, thereby reducing the temperature loss of the steaming chamber 100 and contributing to the energy saving and consumption reduction of the vertical steaming machine.

[0035] The insulation interlayer 104 can be an air interlayer or filled with insulation material (not shown in the figure) to further improve the insulation effect. Preferably, the insulation interlayer 104 is filled with insulation material. The insulation material can be rock wool, glass wool, or expanded perlite board, etc.

[0036] In this embodiment, as Figure 4 As shown, the above-mentioned heat insulation shell 14 includes an upper shell 141 and a lower shell 142 that are fixedly connected to the upper and lower surfaces of the insulating ring 15, respectively. The insulating ring 15 passes through the heat insulation interlayer 104 between the upper shell 141 and the lower shell 142 and is fixedly connected to the outer shell 16.

[0037] Since the insulating ring 15 needs to pass through the insulation shell 14 to be fixed to the outer shell 16, the insulation shell 14 is divided into upper and lower shells. This allows the insulating ring 15 to be connected to the inner shell 11, the outer shell 16, and the insulation shell 14. Furthermore, the upper shell 141, the lower shell 142, and the insulating ring 15 form a cross-shaped connection structure, thereby providing stable support for the insulation interlayer 104 and improving the overall structural strength.

[0038] For some possible implementations, please refer to [link / reference]. Figure 2 and Figure 4The outer shell 16 is provided with a first steam pipe 40 and a second steam pipe 50 along its radial direction. The first steam pipe 40 is sealed and inserted into the steam inlet ring cavity 101, and the second steam pipe 50 is sealed and inserted into the preheating ring cavity 102. The first steam pipe 40 is provided with a first steam valve 41, and the second steam pipe 50 is provided with a second steam valve 51.

[0039] Before steaming begins, the first steam valve 41 is closed and the second steam valve 51 is opened, allowing high-temperature steam to be introduced into the preheating annular cavity 102 through the second steam pipe 50. After preheating is complete, the first steam valve 41 is opened and the second steam valve 51 is closed, at which point the first steam pipe 40 begins to introduce high-temperature steam into the steam inlet annular cavity 101. During the steaming process, the steam intake of each steam inlet annular cavity 101 can be adjusted by regulating the opening degree of each first steam valve 41, thereby controlling the temperature of each section of the steaming cavity 100 and ensuring the consistency of the steaming degree of the material.

[0040] Specifically, in combination Figure 2 and Figure 4 It is understood that each steaming chamber 100 is equipped with a temperature measuring element 60. The temperature measuring element 60 can be a temperature sensor, which can detect the temperature in each steaming chamber 100 in real time, thereby serving as the basis for adjusting the amount of high-pressure steam entering each steam inlet ring chamber 101. This is beneficial for accurately controlling the temperature of the steaming chamber 100, thereby improving the uniformity of the steaming degree of the material.

[0041] In some embodiments, both the first steam valve 41 and the second steam valve 51 are electrically controlled valves. Preferably, the first steam valve 41 is an electrically controlled proportional valve. Each electrically controlled proportional valve and each temperature sensor is electrically connected to the control system of the vertical steaming machine. The temperature sensors feed back detection signals to the control system, which then controls the electrically controlled proportional valves to automatically adjust their opening based on the received signals. This ensures temperature consistency in each steaming chamber 100, thereby improving the steaming quality of the material.

[0042] In some embodiments, please refer to Figures 1 to 4 Each cavity unit 10 has multiple observation holes spaced circumferentially, each observation hole communicating with the steaming cavity 100, and each observation hole encapsulating a viewing panel 17. The interior of the steaming cavity 100 can be directly viewed through the viewing panel 17, facilitating the monitoring of the material's condition within the steaming cavity 100. The viewing panel 17 can also be used as a mounting base for the temperature sensing element 60, facilitating its disassembly, assembly, and maintenance.

[0043] Based on the above, please refer to Figure 4 and Figure 6In this embodiment, a cleaning brush 18 is rotatably connected to the side of the transparent panel 17 facing the steaming chamber 100. The cleaning brush 18 has an operating handle 181 that extends through the steaming chamber 100 in a sealed manner. Since the material directly contacts the transparent panel 17 in the steaming chamber 100, it is easy for the material to adhere to the transparent panel 17 and obstruct the view, making it impossible to see the inside of the steaming chamber 100. At this time, the operator can rotate the exposed operating handle 181 to make the cleaning brush 18 rotate and scrape off the material adhering to the transparent panel 17, thereby solving the problem of the material obstructing the transparent panel 17. The operation is simple and convenient.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. The steaming chamber structure of a vertical rice bran steamer, characterized in that, It includes multiple cavity units that are sealed and connected layer by layer, a central steam inlet pipe, and a top cover that covers the top cavity unit; the inner cavity of each cavity unit is formed as a steaming chamber, the top cover is provided with a feed pipe and an exhaust pipe, the central steam inlet pipe is connected to the top cover and passes through the center of each steaming chamber layer by layer downwards, and the central steam inlet pipe has several rings of exhaust holes distributed at intervals above and below; The outer periphery of the cavity unit has a mutually isolated steam inlet annular cavity and a preheating annular cavity. The steam inlet annular cavity is connected to the steam chamber through a plurality of steam inlet holes distributed circumferentially on its cavity wall. The preheating annular cavity is used to introduce high-temperature steam before the steam inlet annular cavity to preheat the steam chamber; the steam inlet annular cavity and the central steam inlet pipe are used to introduce high-temperature steam after the steam chamber is preheated.

2. The steaming chamber structure of the vertical rice bran steamer as described in claim 1, characterized in that, The cavity unit includes: Inner shell, used to enclose the cavity wall of the steaming chamber; The upper flange and the lower flange are respectively fitted and fixed to the upper and lower ends of the inner shell; The insulation shell is fixedly connected to the upper flange and the lower flange at its upper and lower ends, respectively. The insulation shell is wrapped around the outer periphery of the inner shell and forms an interlayer space between the inner shell and the inner shell. An isolation ring is fitted around the outer periphery of the inner shell and fixedly connected to the insulation shell. The isolation ring divides the interlayer space into the steam inlet annular cavity and the preheating annular cavity.

3. The steaming chamber structure of the vertical rice bran steamer as described in claim 2, characterized in that, The inner shell has fish-scale-shaped holes protruding towards the interior of the steam chamber as steam inlets, and the steam outlets extend obliquely downwards from the inner wall to the outer wall of the central steam inlet pipe.

4. The steaming chamber structure of the vertical rice bran steamer as described in claim 2, characterized in that, The cavity unit also includes an outer shell, which is sleeved around the outer periphery of the insulation shell and forms an insulation interlayer between the insulation shell and the insulation shell. The upper and lower ends of the outer shell are fixedly connected to the upper flange and the lower flange, respectively.

5. The steaming chamber structure of the vertical rice bran steamer as described in claim 4, characterized in that, The insulation shell includes an upper shell and a lower shell that are fixedly connected to the upper and lower surfaces of the insulating ring, respectively. The insulating ring passes through the insulation interlayer between the upper shell and the lower shell and is fixedly connected to the outer shell.

6. The steaming chamber structure of the vertical rice bran steamer as described in claim 4, characterized in that, The insulation interlayer is filled with insulation material.

7. The steaming chamber structure of the vertical rice bran steamer as described in claim 4, characterized in that, The outer shell is provided with a first steam pipe and a second steam pipe through it radially. The first steam pipe is sealed through the steam inlet ring cavity, and the second steam pipe is sealed through the preheating ring cavity. The first steam pipe is provided with a first steam valve, and the second steam pipe is provided with a second steam valve.

8. The steaming chamber structure of the vertical rice bran steamer as described in any one of claims 1-7, characterized in that, Each of the steam chambers described in this section is equipped with a temperature measuring element.

9. The steaming chamber structure of the vertical rice bran steamer as described in any one of claims 1-7, characterized in that, Each cavity unit is provided with a plurality of observation holes spaced apart along its circumference. Each observation hole is connected to the steaming cavity and each observation hole is encapsulated with a transparent panel.

10. The steaming chamber structure of the vertical rice bran steamer as described in claim 9, characterized in that, The transparent panel is rotatably connected to a cleaning brush on the side facing the steam chamber, and the cleaning brush has an operating handle that seals and extends out of the steam chamber.

Images