Silent steam heater

Abstract

The utility model discloses a kind of mute steam heaters, belong to steam heating technical field.A kind of mute steam heater, including cylinder, the cavity is opened in the one end of cylinder, the cavity top is connected with air inlet pipe, the cavity inner bottom is opened with multiple first holes, the other end of cylinder is opened with multiple second holes coaxial with first hole, and the outer wall of cylinder is opened with annular groove, and the first hole outlet and second hole entrance are located in annular groove;The utility model is opened with cavity in the one end of cylinder, is opened with first hole in cavity bottom, is opened with second hole corresponding with first hole in the other end of cylinder, and is opened with annular groove in the junction of first hole and second hole, when steam enters water body, can effectively prevent high-temperature gas suddenly and cold water contact produce compression sound explosion, to realize the effect of reducing noise.

Description

Technical Field

[0001] This utility model relates to the field of steam heating technology, and in particular to a silent steam heater. Background Technology

[0002] In hot pot base processing plants, equipment such as sterilization lines and pepper cooking machines are frequently used. Sterilization lines are mainly used to sterilize the raw materials or finished products in hot pot base to eliminate any possible microorganisms (such as bacteria, mold, yeast, etc.), thereby extending the shelf life of the product and ensuring food safety. Pepper cooking machines are specifically designed to process chili peppers and other spices. Through continuous stirring and heating, the chili peppers are thoroughly mixed with other seasonings, ensuring that each chili pepper is heated evenly and releases its optimal flavor. The cooking process softens the structure of the chili peppers, making them easier to chew and allowing them to better integrate into the base, providing a rich and layered taste experience.

[0003] Sterilization lines and pepper cooking machines typically use steam heaters for heating. Steam heating is achieved through pipe perforation heating. During the heating process, when steam encounters cold water, it undergoes violent contraction and explosion, resulting in significant noise pollution that affects workers' hearing and causes considerable trouble for manufacturers. Utility Model Content

[0004] The purpose of this invention is to solve the problem of noise generated when steam is directly injected into water in the prior art, and to propose a silent steam heater.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A silent steam heater includes a column, a cavity is formed in one end of the column, an air inlet pipe is connected to the top of the cavity, a plurality of first holes are formed in the bottom of the cavity, a plurality of second holes are formed in the other end of the column and coaxial with the first holes, and an annular groove is formed in the outer wall of the column, with the outlet of the first hole and the inlet of the second hole both located in the annular groove.

[0007] To further separate the steam, preferably, a mesh cover is fixedly connected inside the annular groove, and the inlets of the multiple second holes are all located inside the mesh cover.

[0008] Furthermore, the porosity of the mesh cover is 40%-50%, and the pore size is 1-2mm.

[0009] To reduce the flow velocity at the outlet of the first hole, preferably, the outlet of the first hole is provided with a funnel-shaped diffuser hole.

[0010] Preferably, the inner diameter of the second hole is 1.5-3 times the inner diameter of the first hole.

[0011] To facilitate the processing of the cavity, preferably, a cover plate is fixedly connected to the top of the cavity, and the air inlet pipe is fixedly connected to the cover plate.

[0012] Compared with the prior art, the present invention provides a silent steam heater, which has the following advantages:

[0013] 1. This silent steam heater has a cavity at one end of the column, a first hole at the bottom of the cavity, and a second hole at the other end of the column corresponding to the first hole. An annular groove is formed at the junction of the first and second holes. When steam enters the water, it can effectively prevent high-temperature gas from suddenly contacting cold water and generating a compression sonic boom, thereby achieving the effect of reducing noise.

[0014] 2. This silent steam heater, by fixing a mesh cover inside the annular groove, divides the steam into finer airflows when it passes through the mesh cover, reducing the intensity of turbulence and reducing the impact noise when sprayed onto the main water body by 10-15dB. The "screening" effect of the mesh cover can eliminate large-scale eddies, making the steam distribution more uniform and reducing the "steam explosion" noise generated in local high-pressure areas.

[0015] The parts of this device not described herein are the same as or can be implemented using existing technologies. This utility model opens a cavity at one end of the column, opens a first hole at the bottom of the cavity, and opens a second hole at the other end of the column corresponding to the first hole. Moreover, an annular groove is opened at the junction of the first hole and the second hole. When steam enters the water, it can effectively prevent high-temperature gas from suddenly contacting cold water and generating a compression sonic boom, thereby achieving the effect of reducing noise. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a silent steam heater proposed in this utility model. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of a silent steam heater proposed in this utility model. Figure 2 ;

[0018] Figure 3 This is a bottom view of a silent steam heater proposed in this utility model;

[0019] Figure 4 This is a cross-sectional view of a silent steam heater proposed in this utility model.

[0020] In the diagram: 1. Column; 2. Cover plate; 3. Intake pipe; 4. Cavity; 5. First hole; 6. Second hole; 7. Annular groove; 8. Mesh cover. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0023] Example:

[0024] Reference Figures 1-4A silent steam heater includes a column 1, which is made of aluminum alloy or stainless steel, preferably stainless steel. A cavity 4 is formed inside one end of the column 1, and an air inlet pipe 3 is connected to the top of the cavity 4. The top of the cavity 4 is open, so a cover plate 2 is fixedly connected to the top of the cavity 4 to form a sealed structure. The air inlet pipe 3 is fixedly connected to the cover plate 2 and extends into the cavity 4. Here, the air inlet pipe 3 and the cover plate 2 are integrally formed. Then, the cover plate 2 with the air inlet pipe 3 is fixed to the open part of the cavity 4 by welding. To ensure a tight seal at the weld, an internal thread is provided on the inner wall of the intake pipe 3, allowing the steam input pipe to be threaded into the intake pipe 3 for easy and secure connection. To improve the sealing effect at the threaded connection, the internal thread in the intake pipe 3 is a sealing thread. Furthermore, when connecting the input pipe, sealant is applied to the external thread on the outer wall of the input pipe to enhance the sealing effect. Multiple first holes 5 are provided at the bottom inner part of the cavity 4, ranging from two to thirty; here, eighteen are preferred. Multiple holes identical to the first holes 5 are provided at the other end of the column 1. The shaft has eighteen second holes 6, corresponding one-to-one with the first hole 5. An annular groove 7 is formed on the outer wall of the column 1, extending to the junction of the first hole 5 and the second hole 6. This means that the outlet of the first hole 5 and the inlet of the second hole 6 are both located within the annular groove 7, at the top and bottom of the groove, respectively. The inner diameter of the second hole 6 is 1.5-3 times the inner diameter of the first hole 5; preferably, it is 2 times. The inner diameter of the first hole 5 ranges from 1-10 mm, preferably 4 mm, while the inner diameter of the second hole 6 is 8 mm. The width of the annular groove 7 ranges from 2 to 10 mm, and here we prefer 5 mm. During use, after the steam enters the cavity 4, it is first "diverted" through multiple first holes 5 at the bottom—the originally concentrated steam flow is divided into multiple fine airflows, and the velocity and momentum of each airflow are significantly reduced. According to the principle of aerodynamic noise, the noise intensity is proportional to the 6th to 8th power of the airflow velocity. The reduction in velocity will directly weaken the source energy of the jet noise. At the same time, the "throttling effect" of the first holes 5 initially reduces the steam pressure when passing through the first holes 5, reducing the impact noise when high-pressure steam is discharged. Then, when the steam is ejected through the first holes 5, it has a clear downward injection direction (because the outlet of the first hole 5 is at the top of the annular groove 7, and the inlet of the second hole 6 is at the bottom of the annular groove 7, the two are aligned in the vertical direction). The kinetic energy of this directional jet propels the steam to move preferentially into the lower second hole 6, rather than diffuse towards the outer wall of the horizontal annular groove 7. Therefore, when the steam flows from the first hole 5 into the second hole 6, it must first penetrate the water layer in the annular groove 7 before entering the second hole 6. During this process, the kinetic energy of the steam is greatly weakened by the viscous resistance and buoyancy of the water (the kinetic energy loss can reach 30%-50%).For example, the rising velocity of steam bubbles formed in water is only 0.1-0.3 m / s, far lower than the free jet velocity (usually >50 m / s), significantly reducing the source energy of jet noise. The "filtering" effect of the water layer on the steam reduces the steam pressure fluctuation at the inlet of the second hole 6, avoiding pulsating noise caused by sudden pressure changes (similar to the principle that "water flows more smoothly after passing through a sponge"). Furthermore, after the steam in the annular groove 7 comes into contact with the water, rapid condensation and energy transfer occur: high-temperature steam (usually 150-300℃) rapidly condenses into small water droplets, reducing its volume by about 1600 times, and the internal energy of the steam is converted into the thermal energy of the water, reducing the residual energy sprayed towards the main water body. Through the above structure, when steam is introduced into the water body, it is possible to prevent high-temperature gas from suddenly contacting cold water and generating a compression sonic boom, thereby achieving the effect of noise reduction.

[0025] Reference Figure 4 A mesh cover 8 is fixedly connected inside the annular groove 7. The mesh cover 8 is made of stainless steel mesh and is welded into the annular groove 7. The thickness of the mesh cover 8 ranges from 1 to 3 mm, preferably 2 mm. The inlets of multiple second holes 6 are all located inside the mesh cover 8. The porosity of the mesh cover 8 is 40%-50%, and the pore diameter is 1-2 mm. Here, the porosity is preferably 45%, and the pore diameter is 2 mm. When in use, the steam is divided into finer airflows (flow velocity is reduced to below 10 m / s) when passing through the mesh cover 8, the turbulence intensity is weakened, and the impact noise when sprayed onto the main water body is reduced by 10-15 dB. The "screening" effect of the mesh cover 8 can eliminate large-scale eddies, make the steam distribution more uniform, and reduce the "steam explosion" noise generated by local high-pressure areas.

[0026] The first hole 5 outlet has a funnel-shaped diffuser with an expansion angle of 15°-30°, preferably 20°. The outlet diameter is 1.5 times that of the main hole, and the inner wall is polished to Ra0.8μm. In use, when steam is ejected from the first hole 5, it forms a laminar jet (Reynolds number <2000), avoiding the generation of turbulent noise. The gradually expanding structure reduces the outlet velocity (according to Bernoulli's equation, the velocity is reduced by 30%-40%), while also reducing the "cavitation effect" (high-frequency noise generated by bubble collapse) at the outlet of the first hole 5, thereby reducing noise.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A silent steam heater, comprising a column (1), characterized in that, A cavity (4) is provided at one end of the column (1), and an air inlet pipe (3) is connected to the top of the cavity (4). Multiple first holes (5) are provided at the bottom of the cavity (4). Multiple second holes (6) coaxial with the first holes (5) are provided at the other end of the column (1). An annular groove (7) is provided on the outer wall of the column (1). The outlet of the first hole (5) and the inlet of the second hole (6) are both located in the annular groove (7).

2. A silent steam heater according to claim 1, characterized in that, A mesh cover (8) is fixedly connected inside the annular groove (7), and the entrances of the multiple second holes (6) are all located inside the mesh cover (8).

3. A silent steam heater according to claim 2, characterized in that, The mesh cover (8) has a porosity of 40%-50% and a pore size of 1-2mm.

4. A silent steam heater according to claim 1, characterized in that, The first hole (5) has a funnel-shaped diffuser at its outlet.

5. A silent steam heater according to claim 1, characterized in that, The inner diameter of the second hole (6) is 1.5-3 times the inner diameter of the first hole (5).

6. A silent steam heater according to claim 1, characterized in that, The top of the cavity (4) is fixedly connected to a cover plate (2), and the air inlet pipe (3) is fixedly connected to the cover plate (2).

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