Air diffusion cavity of adsorption cylinder

Abstract

The utility model belongs to the technical field of pressure swing adsorption, and particularly relates to an air diffusion cavity of an adsorption cylinder, which comprises a first sleeve, a second sleeve rotatably connected to the outer side of the first sleeve, two straight grooves arranged on the outer wall of the first sleeve, two spiral grooves arranged on the outer wall of the second sleeve, and an exhaust port formed at the intersection position of the spiral grooves and the straight grooves. A cavity wall is arranged on the outer side of the second sleeve, a plurality of through holes are formed in the outer wall of the cavity wall, and a plurality of fan blade components are arranged on the outer wall of the second sleeve. The exhaust port continuously moves through the rotating speed difference between the first sleeve and the second sleeve, so that gas is prevented from always acting on the same position of the molecular sieve in a concentrated manner, the molecular sieve is prevented from being pulverized too early to influence the service life, and the exhaust port repeatedly moves up and down and is matched with the stirring of the fan blade part, so that the service life is prolonged. The gas in the cavity wall is uniformly scattered and mixed, so that the gas in the cavity wall can be uniformly contacted with the molecular sieve, and the premature failure of the molecular sieve caused by uneven load of each part of the molecular sieve is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure swing adsorption, in particular to an air diffusion chamber of an adsorption cylinder. Background Art

[0002] A full analysis of the flow rate of compressed air in the nitrogen generator system, the flow rate in the adsorption tower and the influence of airflow distribution on adsorption efficiency shows that the flow rate of air from the gas pipeline to the adsorption bed in the adsorption tower varies greatly. If there is no suitable airflow distribution structure in the adsorption tower, it will cause uneven airflow distribution, resulting in different working loads of the molecular sieve in the adsorption tower, which will directly affect the adsorption efficiency of the equipment and cause the molecular sieve to pulverize and fail early.

[0003] Therefore, the distribution of the inlet air flow is improved during the implementation of the nitrogen generator. In the traditional structure, when the gas enters the tower, an adsorption layer approximately in the shape of a cone is formed in the adsorption bed, which will form an adsorption dead angle, which can prevent the adsorption capacity of the molecular sieve in the adsorption tower from being fully utilized. In addition, when the air flow is directly blown to the molecular sieve, the molecular sieve will be easily powdered, partially overloaded, and the utilization rate of the molecular sieve will be low, and the service life will be short.

[0004] The Chinese patent with the authorization announcement number CN208406520U discloses an air flow distribution and diffusion structure, including a cylinder, a molecular sieve, a coconut mat, an arc-shaped orifice plate net, a desiccant, an inert porcelain ball, a spiral cyclone diffuser, a gas preliminary diffusion and diversion net, an air intake head, an air intake sleeve, and a gas buffer chamber. The two ends of the cylinder are respectively connected with air intake heads, an adsorption layer filled with a molecular sieve is arranged in the cylinder, a coconut mat is arranged under the molecular sieve, a spherical desiccant and an inert porcelain ball are arranged between the arc-shaped orifice plate net and the coconut mat, an air intake sleeve is arranged on the air intake head, and the air intake sleeve A spiral cyclone diffuser is provided inside, and a gas preliminary diffusion and diversion network is provided at the lower end of the air inlet sleeve. A gas buffer chamber is formed around the gas preliminary diffusion and diversion network to diffuse the gas, which can reduce the impact of the gas on the molecular sieve during expansion and improve the service life and adsorption capacity of the molecular sieve. The double diffusion and deceleration of the airflow by the gas diffusion tube at the inlet end and the spiral cyclone diffuser can reduce the impact energy of the airflow at the inlet end and evenly distribute the airflow, eliminate the dead corner of the adsorption layer, prevent the adsorbent from being damaged and pulverized, and improve the utilization rate of the adsorbent.

[0005] However, the above has the following shortcomings:

[0006] Although the above patent achieves gas diffusion and reduces the impact of gas on the molecular sieve to ensure the practical life of the molecular sieve, the above patent still adopts the traditional method of air intake from the bottom of the adsorption tube. When nitrogen is produced, the molecular sieve at the bottom of the adsorption tube is first in contact with the gas, and the working load of the bottom molecular sieve is higher than the load at the top, resulting in inconsistent absorption performance at the upper and lower ends of the molecular sieve, affecting the nitrogen production quality and processing efficiency.

[0007] Although the above patent can diffuse the gas so that the gas contacts the molecular sieve more evenly and avoids adsorption dead corners, the contact area between the diffused gas and the molecular sieve is small, and the gas flow acting on the molecular sieve per unit time is low, which limits its production speed and work efficiency. Utility Model Content

[0008] In order to overcome the deficiencies of the prior art, the utility model solves the technical problem of, through the speed difference between the rotation of the first sleeve and the second sleeve, making the exhaust port formed by the staggered spiral groove and the straight groove repeatedly move from low to high, so that the position of the ejected gas is constantly changed, effectively avoiding the gas from always concentrating on the same position of the molecular sieve, thereby avoiding the molecular sieve from being pulverized prematurely and affecting the practical life, and repeatedly moving the exhaust port up and down to reduce the difference in gas concentration between the top and the bottom of the cavity wall, and cooperating with the stirring of the fan blade component to evenly disperse and mix the gas in the cavity wall, so that the gas in the cavity wall can evenly contact with the molecular sieve, thereby achieving the goal of avoiding the occurrence of adsorption dead corners and avoiding the premature failure of the molecular sieve caused by uneven loads of various parts of the molecular sieve, and effectively increasing the contact area between the gas and the molecular sieve, greatly improving the working efficiency of the adsorption cylinder.

[0009] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: an adsorption cylinder air diffusion chamber, comprising a first sleeve, a second sleeve rotatably connected to the outside of the first sleeve, two straight grooves evenly distributed on the outer wall of the first sleeve, two spiral grooves evenly distributed in a circumferential direction on the outer wall of the second sleeve, an exhaust port is formed at the intersection of the spiral groove and the straight groove, a chamber wall is arranged on the outside of the second sleeve, and a plurality of through holes evenly distributed on the outer wall of the chamber wall.

[0010] The speed difference between the first sleeve and the second sleeve is utilized to make the exhaust port move up and down continuously, so as to avoid the problem of gas being concentrated at the same position of the molecular sieve and reducing the service life. The exhaust port that moves up and down can make the gas be distributed more evenly in the cavity wall, so as to avoid the problem of different loads between different parts of the molecular sieve and the premature failure of the molecular sieve.

[0011] Furthermore, a sealing strip is fixedly connected to the inner wall of the second sleeve around the spiral groove and is in close contact with the outer wall of the first sleeve and can slide relative to it.

[0012] By providing a sealing strip, the air tightness around the exhaust port is improved during the up and down movement of the exhaust port to avoid gas leakage.

[0013] Furthermore, a sun gear is rotatably connected at the center of the top end of the second sleeve, the shaft of the sun gear passes through the second sleeve and is fixedly connected to the top end of the first sleeve, and four planetary gears meshingly connected to the sun gear are rotatably connected to the top end of the second sleeve around the sun gear, and the outer sides of the four planetary gears are meshingly connected to gear rings, and the gear rings are fixedly connected to the cavity wall.

[0014] The planetary gear pair is composed of the planetary gear, the sun gear and the ring gear, so that the second sleeve can be driven to rotate synchronously while the first sleeve rotates, and a stable speed difference is maintained between the first sleeve and the second sleeve, so that the exhaust port can move up and down stably.

[0015] Furthermore, a plurality of fan blade plates are evenly distributed and fixedly connected to the outer wall of the second sleeve in the spiral direction of the spiral groove, each of the fan blade plates is fixedly connected to a fan blade made of a soft material, and each of the fan blades is provided with even and fine comb teeth at the edge.

[0016] By arranging the fan blade plate and the fan blades, the gas in the cavity wall can be evenly dispersed while the second sleeve rotates, thereby further improving the consistency of the gas concentration in the cavity wall and avoiding different loads between different parts of the molecular sieve. By arranging the comb teeth, the effect of stirring the gas can be enhanced while the fan blades rotate, thereby further improving the uniformity of the gas in the cavity wall.

[0017] Furthermore, a cylinder wall is fixedly connected to the outside of the cavity wall, a molecular sieve is filled between the cylinder wall and the cavity wall, an air inlet pipe is fixedly connected to the bottom of the cylinder wall and rotatably connected to the bottom of the first sleeve, an air collecting port connected to the inside of the cylinder wall is opened at the top of the cylinder wall, a driven wheel is fixedly connected to the part of the bottom of the first sleeve extending out of the second sleeve, a motor is fixedly connected to one side of the bottom of the cylinder wall, an output end of the motor extends into the cylinder wall and is transmission-connected to a driving wheel, and the driving wheel and the driven wheel are rotationally connected via a transmission belt.

[0018] In summary, compared with the prior art, the beneficial effects of the present invention are:

[0019] The speed difference between the first sleeve and the second sleeve is utilized to make the exhaust port move up and down continuously, so as to avoid the problem that the gas is concentrated on the same position of the molecular sieve and reduces the service life.

[0020] The exhaust port that moves up and down can make the gas more evenly distributed in the cavity wall, and cooperate with the fan plate and the fan blade to stir the gas, so as to improve the consistency of the gas concentration in the cavity wall, thereby avoiding the problem of premature failure of the molecular sieve due to different loads between different parts of the molecular sieve.

[0021] Extending into the molecular sieve through the cavity wall greatly increases the contact area between the gas and the molecular sieve, thereby increasing processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional schematic diagram of this patent.

[0023] Figure 2 This is a side view of the patent.

[0024] Figure 3 for Figure 2 Stereoscopic cross-sectional view at AA in the middle.

[0025] Figure 4 It is a schematic diagram of the structure of the first sleeve and the second sleeve.

[0026] Figure 5 This is a schematic diagram of the internal structure of this patent.

[0027] Figure 6 for Figure 5 A partial enlarged view of point B in the middle.

[0028] Figure 7 It is a structural schematic diagram of the fan blade component.

[0029] Figure 8 This is a schematic diagram of the structure of this patent after being installed in the cylinder wall.

[0030] Fig. 9 Schematic diagram of the second sleeve with another spiral groove

[0031] Explanation of the reference numerals: first sleeve 10; second sleeve 11; spiral groove 12; straight groove 13; exhaust port 14; driven wheel 15; impeller plate 16; impeller 17; comb teeth 18; cavity wall 19; sealing strip 20; planetary gear 21; sun gear 22; ring gear 23; through hole 24; cylinder wall 25; air inlet pipe 26; motor 27; driving wheel 28; transmission belt 29; molecular sieve 30; air collecting port 31. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention.

[0033] Embodiment 1:

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, an adsorption cylinder air diffusion chamber includes a first sleeve 10, and a second sleeve 11 is rotatably connected to the outside of the first sleeve 10, two straight grooves 13 are evenly distributed on the outer wall of the first sleeve 10, and two spiral grooves 12 are evenly distributed in a circumferential direction on the outer wall of the second sleeve 11, and an exhaust port 14 is formed at the intersection of the spiral grooves 12 and the straight grooves 13, and a cavity wall 19 is arranged on the outside of the second sleeve 11, and a plurality of through holes 24 are evenly distributed on the outer wall of the cavity wall 19.

[0035] The speed difference between the first sleeve 10 and the second sleeve 11 is utilized to make the exhaust port 14 move up and down continuously, so as to avoid the problem of gas being concentrated at the same position of the molecular sieve and reducing the service life. The exhaust port 14 that moves up and down can make the gas be distributed more evenly in the cavity wall 19, so as to avoid the problem of different loads between different parts of the molecular sieve and the problem of premature failure of the molecular sieve.

[0036] like Figure 3 and Figure 5 As shown, a sealing strip 20 is fixedly connected to the inner wall of the second sleeve 11 around the spiral groove 12 and is tightly fitted with and relatively slidable against the outer wall of the first sleeve 10 .

[0037] By providing the sealing strip 20 , the air tightness around the exhaust port 14 is improved during the upward and downward movement of the exhaust port 14 , thereby preventing gas leakage.

[0038] like Figure 3 and Figure 6 As shown, a sun gear 22 is rotatably connected at the center of the top end of the second sleeve 11, and the rotating shaft of the sun gear 22 passes through the second sleeve 11 and is fixedly connected to the top end of the first sleeve 10. Four planetary gears 21 meshingly connected to the sun gear 22 are rotatably connected to the top end of the second sleeve 11 around the sun gear 22. The outer sides of the four planetary gears 21 are meshingly connected to a ring gear 23, and the ring gear 23 is fixedly connected to the cavity wall 19.

[0039] The planetary gear 21, the sun gear 22 and the ring gear 23 form a planetary gear pair, so that the second sleeve 11 can be driven to rotate synchronously while the first sleeve 10 rotates, and a stable speed difference is maintained between the first sleeve 10 and the second sleeve 11, so that the exhaust port 14 can move up and down stably.

[0040] like Figure 3 , Figure 5 and Figure 7 As shown, a plurality of blade plates 16 are evenly distributed and fixedly connected to the outer wall of the second sleeve 11 in the spiral direction of the spiral groove 12, each blade plate 16 is fixedly connected to a blade 17 made of soft material, and each blade 17 is provided with uniform and fine comb teeth 18 at the edge.

[0041] By providing the fan blade plate 16 and the fan blade 17, the gas in the cavity wall 19 can be evenly dispersed while the second sleeve 11 rotates, thereby further improving the consistency of the gas concentration in the cavity wall 19 and avoiding different loads between different parts of the molecular sieve. By providing the comb teeth 18, the effect of stirring the gas can be enhanced while the fan blade 17 rotates, thereby further improving the uniformity of the gas in the cavity wall 19.

[0042] like Figure 8 As shown, a cylinder wall 25 is fixedly connected to the outside of the cavity wall 19, a molecular sieve 30 is filled between the cylinder wall 25 and the cavity wall 19, an air inlet pipe 26 rotatably connected to the bottom of the first sleeve 10 is fixedly connected to the bottom of the cylinder wall 25, a gas collecting port 31 connected to the inside of the cylinder wall 25 is opened at the top of the cylinder wall 25, a driven wheel 15 is fixedly connected to the part of the bottom of the first sleeve 10 extending out of the second sleeve 11, a motor 27 is fixedly connected to one side of the bottom of the cylinder wall 25, an output end of the motor 27 extends into the cylinder wall 25 and is transmission-connected to a driving wheel 28, and the driving wheel 28 and the driven wheel 15 are transmission-connected via a transmission belt 29.

[0043] In this embodiment, after the patent is installed in the cylinder wall 25, the motor 27 is connected to the power supply, the air inlet pipe 26 is connected to the air inlet pipeline, and the air collecting port 31 is connected to the air collecting pipeline, and then the air inlet pipeline valve is opened, and the gas enters the first sleeve 10 through the air inlet pipe 26, and enters the cavity wall 19 through the exhaust port 14, and finally contacts with the molecular sieve from the through holes 24 evenly distributed on the cavity wall 19, and the final product passes through the molecular sieve and enters the gas collecting pipeline through the air collecting port 31 to be collected.

[0044] During this process, the motor 27 drives the driving wheel 28 to rotate, and then the driven wheel 15 drives the first sleeve 10 to rotate through the transmission belt 29. At the same time, through the planetary gear pair composed of the planetary gear 21, the sun gear 22 and the ring gear 23, the first sleeve 10 synchronously drives the second sleeve 11 to rotate, and a stable speed difference is maintained between the first sleeve 10 and the second sleeve 11.

[0045] Due to the speed difference between the first sleeve 10 and the second sleeve 11, the relative position between the spiral groove 12 and the straight groove 13 is constantly changing, thereby causing the position of the exhaust port 14 formed between the spiral groove 12 and the straight groove 13 to constantly change. Under the stable speed difference between the first sleeve 10 and the second sleeve 11, the exhaust port 14 always moves from bottom to top at a uniform speed and repeats itself. Moreover, since the first sleeve 10 itself is also rotating, the exhaust port 14 makes a spiral movement relative to the fixed cavity wall 19, rotating and rising at the same time, thereby preventing the gas ejected from the exhaust port 14 from acting evenly on every part of the molecular sieve, and preventing the gas from acting concentratedly on the molecular sieve to affect the service life of the molecular sieve.

[0046] While the first sleeve 10 and the second sleeve 11 are rotating, the fan blades 16 and the fan blades 17 move and rotate with the second sleeve 11, and the gas ejected from the exhaust port 14 into the cavity wall 19 is stirred by the fan blades 16 and the fan blades 17, so that the concentration of the gas in various places in the cavity wall 19 is uniform, and the exhaust port 14 is constantly moving in various places, which further improves the uniformity of the gas in the cavity wall 19, so that the gas and the molecular sieve can be in uniform contact, avoiding the generation of adsorption dead corners, and avoiding the problem of premature failure of the molecular sieve due to inconsistent loads between different parts of the molecular sieve, and greatly increasing the contact area between the gas and the molecular sieve, thereby improving the working efficiency of the adsorption cylinder.

[0047] Embodiment 2:

[0048] like Fig. 9 As shown, the shape of the spiral groove 12 is changed from a spiral shape with a uniform pitch to a spiral shape with a pitch that increases continuously from top to bottom.

[0049] As a further embodiment, since the distances between the molecular sieves and the gas collecting port 31 are not equal, the molecular sieves near the gas collecting port 31 have a smaller load on the processed gas than the molecular sieves far away from the gas collecting port 31. To ensure the consistency of the load on the molecular sieves, a spiral groove 12 with a pitch that increases continuously from top to bottom is provided. On the premise that a stable and consistent speed difference is maintained between the second sleeve 11 and the first sleeve 10, the speed at which the exhaust port 14 moves upward is gradually reduced, thereby allowing the molecular sieves near the gas collecting port 31 to get more opportunities to contact the gas, thereby making the load on each part of the molecular sieve more uniform and consistent.

[0050] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0051] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0052] The above description shows and describes several preferred embodiments of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the application concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the present application, and should be within the scope of protection of the claims attached to the present application.

Claims

1. An adsorption cylinder air diffusion chamber, characterized in that: The invention comprises a first sleeve (10), wherein the first sleeve (10) is rotatably connected to a second sleeve (11) on its outer side, two straight grooves (13) are provided on the outer wall of the first sleeve (10), two spiral grooves (12) are provided on the outer wall of the second sleeve (11), an exhaust port (14) is formed at the intersection of the spiral grooves (12) and the straight grooves (13), a cavity wall (19) is provided on the outer side of the second sleeve (11), a plurality of through holes (24) are provided on the outer wall of the cavity wall (19), and a plurality of fan blade components are evenly distributed on the outer wall of the second sleeve (11) according to the spiral direction of the spiral grooves (12).

2. The air diffusion chamber of the adsorption cylinder according to claim 1 is characterized in that: A sealing strip (20) is fixedly connected to the inner wall of the second sleeve (11) around the spiral groove (12) and is tightly fitted with and relatively slidable against the outer wall of the first sleeve (10).

3. The air diffusion chamber of the adsorption cylinder according to claim 1 is characterized in that: A sun gear (22) is rotatably connected at the center of the top end of the second sleeve (11); the rotating shaft of the sun gear (22) passes through the second sleeve (11) and is fixedly connected to the top end of the first sleeve (10); four planetary gears (21) are rotatably connected around the sun gear (22) at the top end of the second sleeve (11) and mesh with the sun gear (22); the outer sides of the four planetary gears (21) are meshed with gear rings (23); and the gear rings (23) are fixedly connected to the cavity wall (19).

4. The air diffusion chamber of the adsorption cylinder according to claim 1 is characterized in that: The fan blade component comprises a fan blade plate (16), wherein a plurality of the fan blade plates (16) are evenly distributed and fixedly connected to the outer wall of the second sleeve (11) in the spiral direction of the spiral groove (12), each of the fan blade plates (16) is fixedly connected to a fan blade (17) made of a soft material, and each of the fan blades (17) is provided with comb teeth (18) at the edge.

5. The air diffusion chamber of the adsorption cylinder according to claim 1 is characterized in that: The outer side of the cavity wall (19) is fixedly connected to a cylinder wall (25), a molecular sieve (30) is filled between the cylinder wall (25) and the cavity wall (19), an air inlet pipe (26) rotatably connected to the bottom of the first sleeve (10) is fixedly connected to the bottom of the cylinder wall (25), and a gas collecting port (31) communicating with the interior of the cylinder wall (25) is provided at the top of the cylinder wall (25).

6. The air diffusion chamber of the adsorption cylinder according to claim 5, characterized in that: A driven wheel (15) is fixedly connected to the portion of the bottom end of the first sleeve (10) extending out of the second sleeve (11); a motor (27) is fixedly connected to one side of the bottom of the cylinder wall (25); an output end of the motor (27) extends into the cylinder wall (25) and is transmission-connected to a driving wheel (28); the driving wheel (28) and the driven wheel (15) are rotationally connected via a transmission belt (29).

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