Modular nitrogen making machine

Abstract

The utility model provides a modularized nitrogen making machine which comprises at least one group of top seat and bottom seat which correspond to each other up and down, a gas outlet cavity and a gas inlet cavity are respectively arranged in the top seat and the bottom seat and are respectively connected with a gas outlet assembly and a gas inlet assembly, and a plurality of upper limiting areas and a plurality of lower limiting areas are respectively and correspondingly arranged on the opposite sides of the top seat and the bottom seat. An upper through hole and a lower through hole which are communicated with the air outlet cavity and the air inlet cavity are respectively formed in the upper limiting area and the lower limiting area in a penetrating manner; each adsorption group is located between the corresponding top seat and the corresponding base, each adsorption group comprises a plurality of adsorption pieces, the upper ends and the lower ends of the adsorption pieces are detachably arranged with the upper limiting area and the lower limiting area in a sealed mode, and adsorption cavities are formed in the adsorption pieces, and the upper ends and the lower ends of the adsorption cavities communicate with the upper through holes and the lower through holes correspondingly; the adsorption cavity is filled with a molecular sieve for filtering out nitrogen, and a group of top seats, a group of bottom seats and a group of adsorption groups form a group of nitrogen generation modules. The convenience of nitrogen preparation amount adjustment and size adjustment is improved, and the production adaptability of the nitrogen making machine is improved.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen generators, specifically a modular nitrogen generator. Background Technology

[0002] High-purity nitrogen, widely used in chemical, electronics, pharmaceutical, and food industries, is produced by pressure swing adsorption (PSA) technology. PSA is a novel gas adsorption and separation technology. Compressed air from an air compressor first enters a refrigerated dryer to remove moisture, and then enters a PSA nitrogen generation unit consisting of two adsorption towers. Specialized carbon molecular sieve adsorbents packed in the towers selectively adsorb impurity gas components such as O2 and CO2, while the product gas N2 is discharged from the top of the tower with 99% purity.

[0003] Currently, the demand for high-purity nitrogen varies across different fields, and some fields have limited space, requiring nitrogen generators to be the right size. However, traditional nitrogen generators are large in size and occupy a large area, and the volume of the adsorption components is fixed, making it impossible to adjust the nitrogen production rate and generator size according to the actual needs of customers, which greatly reduces the adaptability of nitrogen generators.

[0004] Therefore, the research objective of this utility model is to design a modular nitrogen generator with adjustable nitrogen production capacity and volume, addressing the problems existing in the prior art. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a modular nitrogen generator that can effectively solve the problems existing in the prior art.

[0006] The technical solution of this utility model is:

[0007] A modular nitrogen generator, comprising:

[0008] At least one set of top seats and bases corresponding to each other, wherein the top seats and bases are respectively provided with an air outlet chamber and an air inlet chamber, the air outlet chamber and the air inlet chamber are respectively connected to an air outlet component and an air inlet component, and the top seats and bases are respectively provided with a number of upper limit areas and a number of lower limit areas on opposite sides, and the upper limit areas and lower limit areas are respectively provided with upper through holes and lower through holes that connect the air outlet chamber and the air inlet chamber;

[0009] At least one set of adsorption groups, one set of adsorption groups is located between one set of top seats and bases, one set of adsorption groups includes several adsorption components whose upper and lower ends are respectively detachably sealed to the upper limit area and the lower limit area, the adsorption components are provided with adsorption cavities whose upper and lower ends are respectively connected to the upper through hole and the lower through hole, the adsorption cavities are filled with molecular sieves for filtering out nitrogen, and one set of top seats and bases and one set of adsorption groups form a nitrogen generation module.

[0010] Furthermore, the upper limit area and the lower limit area are respectively sealed and fixed with sealing elements corresponding to the upper through hole and the lower through hole. The adsorption element is a cylindrical shape with the upper and lower ends respectively sealing and sleeved with the upper and lower corresponding sealing elements. A set of nitrogen generating modules also includes several connecting rods that are sealed and pass through the top seat and the base, and the upper and lower ends of the several connecting rods are locked and fixed.

[0011] Furthermore, the molecular sieve is a carbon molecular sieve. The outer periphery of the upper and lower sealing members is folded towards each other and then sealed and fitted onto the outer walls of the upper and lower ends of the adsorption member. The middle part of the sealing members protrudes towards each other and forms a diversion area between the top seat and the base, respectively. The diversion area is provided with a diversion member that is externally sealed and connected to the sealing member. The middle part of the diversion member on the upper and lower sides protrudes towards each other to form a diversion section. The far side is respectively separated from the upper through hole and the lower through hole. The side wall of the diversion section is provided with a plurality of diversion holes circumferentially spaced through. The near side of the upper and lower sealing members is provided with a plurality of diversion channels that connect the diversion holes and the adsorption chamber.

[0012] Furthermore, several sets of top seats and bases extend forward and backward and are arranged side by side, several adsorption elements extend vertically and are arrayed between a set of top seats and bases, several nitrogen generating modules are connected to a control cabinet on the front and a fixing plate on the rear, and the air inlet assembly and air outlet assembly are both located inside the control cabinet.

[0013] Furthermore, the gas outlet assembly is connected to the gas inlet end of the corresponding gas storage tank, and the control cabinet is equipped with a gas return assembly. The gas return assembly includes a gas return pipeline connected to the gas outlet end of the gas storage tank, an exhaust pipeline connected to the gas return pipeline and controlled to open and close by an exhaust valve, a finished product pipeline connected to the gas return pipeline and controlled to open and close by a finished product valve, and a purity detection device for detecting the purity of nitrogen in the gas return pipeline.

[0014] Furthermore, one end of several of the bases is provided with a pressure relief and exhaust device for relieving pressure and exhausting air, and the outlet end of the pressure relief and exhaust device is connected to a muffler.

[0015] Furthermore, the adsorbent is a cylindrical shape with sealing elements fitted at both the upper and lower ends. The outer peripheries of the sealing elements on the upper and lower sides are folded towards each other to form restricted portions that are fixedly fastened to the outer walls of the upper and lower ends of the adsorbent. The top seat and the base are respectively provided with several pairs of upper limit portions and several pairs of lower limit portions that are protruding and folded towards each other. An upper limit area is formed between each pair of upper limit portions that is adapted to the upper end and the restricted portion on the upper side of the adsorbent. A lower limit area is formed between each pair of lower limit portions that is adapted to the lower end and the restricted portion on the lower side of the adsorbent. The several upper limit areas and several lower limit areas distributed front and back are coaxially connected. A set of nitrogen generating modules also includes several connecting rods that are sealed through the top seat and the base. After the upper and lower ends of several adsorbents are slidably inserted into the corresponding upper limit area and lower limit area through the restricted portions on the upper and lower sides, the upper and lower ends of several connecting rods are locked and fixed so that the sealing elements on the upper and lower sides respectively seal against the top seat and the base.

[0016] Furthermore, a plurality of connecting rods are arranged in an array, with each pair of connecting rods corresponding to the gaps between adjacent adsorption components. Two limiting blocks, distributed vertically, are slidably fitted onto each pair of connecting rods. The front and rear sides of each limiting block are recessed with abutting portions adapted to the adjacent limiting portions. The upper limiting block is inserted between two pairs of adjacent upper limiting portions, and the abutting portion is limited to abutting the upper ends of the adjacent adsorption components. The lower limiting block is inserted between two pairs of adjacent lower limiting portions, and the abutting portion is limited to abutting the lower ends of the adjacent adsorption components.

[0017] Furthermore, the sealing elements on the upper and lower sides are respectively recessed with sealing grooves, and sealing rings are embedded in the sealing grooves. After the upper and lower ends of the connecting rods are locked and fixed, the sealing rings are deformed by pressure and seal between the top seat and the base and the corresponding sealing grooves.

[0018] Therefore, the beneficial effects of this utility model are:

[0019] 1. By assembling a set of top and base units with a set of adsorption units to form a nitrogen generator module, and with each adsorption unit including several adsorption elements with internal adsorption chambers filled with molecular sieves, the nitrogen generator is modularly designed. This allows the nitrogen generator to meet the nitrogen production needs of users in different fields by adding or removing nitrogen generator modules during production. At the same time, the dimensions of the base and top can be adjusted adaptively, and the layout of the adsorption elements, upper limit area, and lower limit area can also be adjusted accordingly, as long as the upper and lower ends of the adsorption elements can correspond to the upper and lower limit areas and be sealed. This meets the installation size requirements of nitrogen generators in different application scenarios. In summary, the modular nitrogen generator, while achieving high-purity nitrogen production through pressure swing adsorption technology using molecular sieves, improves the convenience of adjusting the nitrogen production volume and size, and enhances the production adaptability of the nitrogen generator.

[0020] 2. By adding a flow divider, the compressed air in the intake chamber is diverted and diffused through several flow dividers in the lower channel before entering the flow divider zone, and finally enters the adsorption chamber through the flow divider channel. This improves the uniformity of compressed air distribution after entering the adsorption chamber, thereby increasing the contact area between the compressed air and the carbon molecular sieve in the adsorption chamber. This enhances the adsorption efficiency of the carbon molecular sieve for impurities such as O2 and CO2 in the compressed air. When the gas exits the adsorption chamber, it can be collected and concentrated through the flow dividers on the upper side, thus improving the nitrogen production efficiency. At the same time, since excessively high air pressure can cause the carbon molecular sieve to break and pulverize, the addition of flow dividers in the flow divider and flow divider channels in the sealing component, based on controlling the compressed air pressure, can disperse the compressed air to further reduce the air pressure, extend the service life of the carbon molecular sieve and improve the adsorption effect.

[0021] 3. By adding a return gas assembly, initially low-concentration nitrogen gas flows sequentially through the outlet and storage tank back to the control valve. When the control valve detects a low nitrogen concentration, the exhaust valve opens and the finished product valve closes, allowing the low-concentration nitrogen to be discharged through the exhaust pipeline. This continues until the control valve detects that the nitrogen purity meets the set value. At this point, the exhaust valve closes and the finished product valve opens, allowing the finished nitrogen to be discharged through the finished product pipeline to the corresponding finished nitrogen storage tank. This avoids the initial low-concentration nitrogen affecting the purity of the finished nitrogen, ensuring the purity of the nitrogen output from the finished product pipeline. Furthermore, by outputting nitrogen to the storage tank and then returning it to the return gas pipeline, the output pressure of the finished nitrogen can be reduced, improving output stability.

[0022] 4. By adding upper and lower limit parts, when installing the adsorbents, the upper and lower ends of several adsorbents are slidably inserted into the corresponding upper and lower limit areas through the upper and lower restricted parts, respectively. Then, the upper and lower ends of several connecting rods are locked to ensure that the upper and lower sealing parts seal against the top seat and the base, respectively. This allows for the synchronous and rapid sealing installation of the upper and lower ends of the adsorbents and alignment with the upper and lower limit areas. Based on this, the limiting settings of the upper and lower restricted parts by the upper and lower limit parts and the locking settings of several connecting rods ensure the installation stability and sealing of the upper and lower ends of the adsorbents, preventing gas leakage that could affect the purity of nitrogen production.

[0023] 5. Based on the upper and lower limit parts for upper and lower limit and left and right limit of the restricted part, the addition of limit blocks for front and rear limit of the restricted part ensures that the upper and lower ends of the adsorption component are stably limited in three directions after installation, thereby further improving the installation stability and sealing of the upper and lower ends of the adsorption component.

[0024] It should be understood that the above summary and the following detailed description of the present invention are exemplary and explanatory, and are intended to provide further explanation of the present invention as claimed. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of Embodiment 1.

[0026] Figure 2 This is a schematic diagram of the nitrogen generation module in Example 1.

[0027] Figure 3 for Figure 2 A cross-sectional structural diagram.

[0028] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0029] Figure 5 for Figure 3 A magnified view of a portion of point B in the middle.

[0030] Figure 6 This is a schematic diagram of the exploded structure of the sealing element and the dispersing element in Example 1.

[0031] Figure 7 This is a schematic diagram of the connection structure after removing the front cover of the control cabinet in Example 1.

[0032] Figure 8 This is a schematic diagram of the nitrogen generation module in Example 2.

[0033] Figure 9 for Figure 8 A schematic diagram of the local structure after the adsorption component has been removed.

[0034] Figure 10 for Figure 8 A schematic diagram of the structure after removing the adsorption component, connecting rod, and limiting block. Detailed Implementation

[0035] To facilitate understanding by those skilled in the art, the structure of this utility model will now be described in further detail with reference to the accompanying drawings:

[0036] Example 1

[0037] refer to Figure 1-7 A modular nitrogen generator, comprising:

[0038] At least one set of top seats 1 and base seats 2 corresponding to each other, wherein the top seats 1 and base seats 2 are respectively provided with an air outlet chamber 11 and an air inlet chamber 21, the air outlet chamber 11 and the air inlet chamber 21 are respectively connected to an air outlet assembly 61 and an air inlet assembly 62, and the top seats 1 and base seats 2 are respectively provided with a plurality of upper limit areas 12 and a plurality of lower limit areas 22 on opposite sides, the upper limit areas 12 and the lower limit areas 22 are respectively provided with upper through holes 121 and lower through holes 221 that connect the air outlet chamber 11 and the air inlet chamber 21; specifically, the air outlet assembly 61 includes an air outlet pipe 611 and an air outlet valve 612 for controlling the opening and closing of the air outlet pipe 611, and the air inlet assembly 62 includes an air inlet pipe 621 connected to the air outlet end of the corresponding compressed air preparation device and an air inlet valve 622 for controlling the opening and closing of the air inlet pipe 621;

[0039] At least one set of adsorption groups, one set of adsorption groups is located between one set of top seat 1 and base 2, one set of adsorption groups includes several adsorption elements 3 whose upper and lower ends are respectively detachably sealed to the upper limit area 12 and the lower limit area 22, the adsorption elements 3 are provided with adsorption cavities 31 whose upper and lower ends are respectively connected to the upper through hole 121 and the lower through hole 221, the adsorption cavities 31 are filled with molecular sieves for filtering out nitrogen, one set of top seat 1 and base 2 and one set of adsorption groups form a nitrogen generation module 7.

[0040] The above-described structure, by assembling a set of top seats 1 and base seats 2 with a set of adsorption units to form a nitrogen generating module 7, and with each adsorption unit including several internal adsorption chambers 31 filled with molecular sieve adsorption elements 3, achieves a modular design for the nitrogen generator. This allows the nitrogen generator to meet the nitrogen production needs of users in different fields by adding or removing nitrogen generating modules 7 during production. At the same time, the dimensions of the base seats 2 and top seats 1 can be adjusted adaptively, and the layout of the adsorption elements 3, the upper limit area 12, and the lower limit area 22 can also be adjusted accordingly, as long as the upper and lower ends of the adsorption elements 3 can correspond to the upper limit area 12 and the lower limit area 22 and be sealed, to meet the installation size requirements of the nitrogen generator for different application scenarios. In summary, the modular nitrogen generator, while achieving high-purity nitrogen production through pressure swing adsorption technology using molecular sieves, improves the convenience of adjusting the nitrogen production volume and size, and enhances the production adaptability of the nitrogen generator.

[0041] To improve the ease of installation of the adsorbent 3, the upper limit area 12 and the lower limit area 22 are respectively sealed and fixed with sealing elements 4 corresponding to the upper through hole 121 and the lower through hole 221. Specifically, the opposite sides of the upper and lower sealing elements 4 are respectively recessed with sealing grooves 44, and sealing rings are embedded in the sealing grooves 44. The adsorbent 3 is a cylindrical shape that is sealed and sleeved at both ends with the upper and lower corresponding sealing elements 4. A set of nitrogen generating modules 7 also includes several connecting rods 5 that are sealed and penetrate through the top seat 1 and the base 2. The upper and lower ends of the several connecting rods 5 are locked and fixed. Specifically, the upper and lower ends of the connecting rods 5 are respectively screwed and fixed by nuts, and the several connecting rods 5 are arranged in an array. Thus, by adding sealing elements 4, the installation of the adsorbent 3 only requires simple sleeve connection and then fixation by connecting rods 5, making installation convenient.

[0042] To improve the uniformity of compressed air distribution after entering the adsorption chamber 31, the molecular sieve is a carbon molecular sieve. Specifically, the main component of the carbon molecular sieve is elemental carbon, and its appearance is a black columnar solid. Because it contains a large number of micropores with a diameter of four angstroms, these micropores have a strong instantaneous affinity for oxygen molecules, and can be used to separate oxygen and nitrogen from the air. Industrially, nitrogen is produced using a pressure swing adsorption (PSA) device. Carbon molecular sieves offer high nitrogen production capacity, high nitrogen recovery rate, and long service life, making them suitable for various types of PSA nitrogen generators and the preferred product for PSA nitrogen generators. The outer peripheries of the upper and lower sealing elements 4 are folded towards each other and then sealed and fitted onto the outer walls of the upper and lower ends of the adsorption element 3. The middle part of the sealing elements 4 protrudes towards each other and forms a diversion area 41 between the top seat 1 and the base 2 respectively. The diversion area 41 is provided with a diversion element 45 that is externally sealed and connected to the sealing element 4. Specifically, the diversion element 45 is sealed and fitted into the sealing element 4 by a sealing ring and screwed to the sealing element 4. The middle part of the diversion element 45 on the upper and lower sides protrudes towards each other to form a diversion part 451. The far side is separated from the upper through hole 121 and the lower through hole 221 respectively. The side wall of the diversion part 451 is provided with a plurality of diversion holes 452 circumferentially spaced through. The near side of the upper and lower sealing elements 4 is provided with a plurality of diversion channels 42 that connect the diversion holes 452 and the adsorption cavity 31 respectively. By adding the diverter 45, the compressed air in the intake chamber 21 is diverted and diffused through the lower channel via several diverter holes 452 before entering the diversion zone 41, and finally enters the adsorption chamber 31 through the diversion channel 42. This improves the uniformity of compressed air distribution after entering the adsorption chamber 31, thereby increasing the contact area between the compressed air and the carbon molecular sieve in the adsorption chamber 31, and improving the adsorption efficiency of the carbon molecular sieve for impurities such as O2 and CO2 in the compressed air. When the adsorption chamber 31 is venting, the gas can be collected and concentrated through the diverter holes 452 on the upper side, thereby improving the nitrogen production efficiency. At the same time, since excessively high air pressure can cause the carbon molecular sieve to break and pulverize, the addition of the diverter holes 452 of the diverter 45 and the diversion channel 42 of the sealing element 4 can disperse the compressed air to further reduce the air pressure, extend the service life of the carbon molecular sieve and improve the adsorption effect, based on controlling the compressed air pressure.

[0043] Specifically, several sets of top seats 1 and bases 2 extend forward and backward and are arranged side by side. Several adsorption components 3 extend vertically and are arranged in an array between a set of top seats 1 and bases 2. Several nitrogen generating modules 7 are connected to a control cabinet 6 on the front and a fixing plate on the rear. The air inlet assembly 62 and the air outlet assembly 61 are both located in the control cabinet 6, which improves the structural compactness of the nitrogen generator. In this embodiment, the nitrogen generating module 7 is provided in two sets. One adsorption group includes two columns of adsorption components 3 on the left and right, with seven adsorption components 3 in each column. In other embodiments, the number of nitrogen generating modules 7, the number of adsorption components 3, and their layout can be adjusted adaptively.

[0044] Because air impurities exist in the adsorption chamber 31 and the carbon molecular sieve has low activity in the early stage, the nitrogen produced by the nitrogen generator in the early stage will have low purity. Therefore, in order to discharge low-purity nitrogen, the gas outlet component 61 is connected to the gas inlet of the corresponding gas storage tank 8. The control cabinet 6 is equipped with a gas return component 63. The gas return component 63 includes a gas return pipeline 631 connected to the gas outlet of the gas storage tank 8, an exhaust pipeline 632 connected to the gas return pipeline 631 and controlled by the exhaust valve 633, a finished product pipeline 634 connected to the gas return pipeline 631 and controlled by the finished product valve 635, and a purity detection device for detecting the nitrogen purity in the gas return pipeline 631. Specifically, the gas outlet of the gas storage tank 8 is also equipped with a dust filter, and the purity detection device is a nitrogen purity analyzer. By adding the return gas assembly 63, the initially low-concentration nitrogen gas flows back to the control valve sequentially through the outlet and storage tank 8. When the control valve detects a low nitrogen concentration, the exhaust valve 633 opens and the finished product valve 635 closes. The exhaust pipeline 632 discharges the low-concentration nitrogen gas until the control valve detects that the nitrogen purity meets the set value. Then, the exhaust valve 633 closes and the finished product valve 635 opens, and the finished nitrogen gas is discharged through the finished product pipeline 634 to the corresponding finished product nitrogen storage tank 9. This avoids the initial low-concentration nitrogen gas affecting the purity of the finished product nitrogen gas, ensuring the purity of the nitrogen gas output from the finished product pipeline 634. Furthermore, by outputting the nitrogen gas to the storage tank 8 and then returning it to the return gas pipeline 631, the output pressure of the finished product nitrogen gas can be reduced, and the output stability can be improved.

[0045] To ensure the continuity of nitrogen production and improve nitrogen production efficiency, one end of each of the bases 2 is provided with a pressure relief and exhaust device 23 for venting and releasing pressure. The outlet end of the valve of the pressure relief and exhaust device 23 is connected to a silencer 24. Specifically, the pressure relief and exhaust device 23 includes valves and drive components such as electromagnetic and cylinder valves. After the molecular sieve in the adsorption chamber 31 completes one adsorption cycle, the pressure relief and exhaust device 23 is opened to release pressure and exhaust gas from the inlet chamber 21, adsorption chamber 31, and outlet chamber 11, so that the inlet chamber 21, adsorption chamber 31, and outlet chamber 11 can continue to perform the next adsorption cycle after pressure relief and exhaust, thereby achieving continuous adsorption and nitrogen production and improving nitrogen production efficiency.

[0046] Example 2

[0047] In Embodiment 1, the adsorption element 3 is installed by fitting the sealing element 4 onto its upper and lower ends respectively. However, since each adsorption group has several adsorption elements 3, it is difficult to simultaneously align the upper end of the adsorption element 3 with the upper sealing element 4 after fitting the lower sealing element 4 onto its lower end during actual production and installation. This requires the use of installation machinery for quick assembly, which increases production costs. Based on this technical problem, [the following is a proposed solution]... Figure 8-10 The difference between this embodiment and Embodiment 1 is that:

[0048] To achieve simultaneous and rapid sealing and alignment of the upper and lower ends of the adsorption element 3 with the upper limit region 12 and the lower limit region 22, the adsorption element 3 is a cylindrical shape with sealing elements 4 respectively fitted at the upper and lower ends. The outer peripheries of the sealing elements 4 on the upper and lower sides are folded towards each other to form restricted portions 43 that are fixedly fastened to the outer walls of the upper and lower ends of the adsorption element 3. The top seat 1 and the base 2 are respectively provided with several pairs of upper limit portions 13 and several pairs of lower limit portions 25 that are raised and folded towards each other on their opposite sides. An upper limit region 12 that is adapted to the restricted portion 43 at the upper end and upper side of the adsorption element 3 is formed between each pair of upper limit portions 13, and a lower limit region 22 that is adapted to the restricted portion 43 at the lower end and lower side of the adsorption element 3 is formed between each pair of lower limit portions 25. Several upper limit regions 12 and several lower limit regions 22 distributed front to back are coaxially connected. The nitrogen generating module 7 also includes several connecting rods 5 that pass through the top seat 1 and the base 2 for sealing. By adding the upper limit part 13 and the lower limit part 25, when installing the adsorbent 3, the upper and lower ends of several adsorbents 3 are slidably inserted into the corresponding upper limit area 12 and lower limit area 22 through the upper and lower limiting parts 43, respectively. Then, the upper and lower ends of the connecting rods 5 are locked in place so that the upper and lower sealing parts 4 respectively seal against the top seat 1 and the base 2. This allows for the synchronous and rapid sealing installation of the upper and lower ends of the adsorbent 3 and alignment with the upper limit area 12 and the lower limit area 22. Furthermore, the limiting settings of the upper and lower limiting parts 43 by the upper limit part 13 and the lower limit part 25, and the locking settings of the connecting rods 5, ensure the installation stability and sealing of the upper and lower ends of the adsorbent 3, preventing leakage that could affect the purity of the nitrogen generated.

[0049] To further improve the installation stability and sealing of the upper and lower ends of the adsorption element 3, a plurality of connecting rods 5 are arranged in an array. The plurality of connecting rods 5 are arranged in pairs, corresponding to the gaps between adjacent adsorption elements 3. Two limiting blocks 51 distributed vertically are slidably sleeved on the pairs of connecting rods 5. The front and rear sides of the limiting blocks 51 are recessed with abutting parts 511 adapted to the adjacent limiting parts 43. The upper limiting block 51 is used to be inserted between two pairs of adjacent upper limiting parts 13, and the abutting part 511 is limited to the upper ends of adjacent adsorption elements 3. The lower limiting block 51 is used to be inserted between two pairs of adjacent lower limiting parts 25, and the abutting part 511 is limited to the lower ends of adjacent adsorption elements 3. Specifically, after the upper and lower limiting blocks 51 are inserted into place, they can be screwed and fixed to the connecting rods 5 respectively. Thus, based on the upper limit part 13 and the lower limit part 25 limiting the restricted part 43 vertically and horizontally, the addition of the limiting block 51 further limits the restricted part 43 front and rear, so that the upper and lower ends of the adsorption component 3 are stably limited in three directions after installation, thereby further improving the installation stability and sealing of the upper and lower ends of the adsorption component 3.

[0050] Specifically, after the upper and lower ends of several connecting rods 5 are locked and fixed, the sealing ring is deformed by pressure and seals between the top seat 1 and the base 2 and the corresponding sealing groove 44.

[0051] It should be noted that this embodiment is implemented in the same way as embodiment one in terms of principle and technical effect. For the sake of brevity, any parts not mentioned in this embodiment can be referred to the corresponding content in embodiment one.

[0052] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A modular nitrogen generator, characterized in that, include: At least one set of top seat (1) and base (2) corresponding to each other, the top seat (1) and base (2) are respectively provided with an air outlet chamber (11) and an air inlet chamber (21), the air outlet chamber (11) and the air inlet chamber (21) are respectively connected to an air outlet component (61) and an air inlet component (62), the top seat (1) and base (2) are respectively provided with a plurality of upper limit areas (12) and a plurality of lower limit areas (22) on opposite sides, the upper limit areas (12) and the lower limit areas (22) are respectively provided with an upper through hole (121) and a lower through hole (221) that connect the air outlet chamber (11) and the air inlet chamber (21); At least one set of adsorption groups, one set of adsorption groups is located between one set of top seat (1) and base (2), one set of adsorption groups includes several adsorption components (3) whose upper and lower ends are respectively detachably sealed to the upper limit area (12) and the lower limit area (22), the adsorption components (3) are provided with adsorption chambers (31) whose upper and lower ends are respectively connected to the upper through hole (121) and the lower through hole (221), the adsorption chambers (31) are filled with molecular sieves for filtering out nitrogen gas, one set of top seat (1) and base (2) and one set of adsorption groups form a nitrogen generation module (7).

2. The modular nitrogen generator as described in claim 1, characterized in that, The upper limit area (12) and the lower limit area (22) are respectively sealed and fixed with sealing elements (4) corresponding to the upper through hole (121) and the lower through hole (221). The adsorption element (3) is a cylindrical shape that is sealed and sleeved at the upper and lower ends of the upper and lower corresponding sealing elements (4). A set of nitrogen generating modules (7) also includes several connecting rods (5) that are sealed and pass through the top seat (1) and the base (2) from the top and bottom. The upper and lower ends of the several connecting rods (5) are locked and fixed.

3. A modular nitrogen generator as described in claim 2, characterized in that, The molecular sieve is a carbon molecular sieve. The outer periphery of the upper and lower sealing members (4) is folded in opposite directions and sealed to the outer walls of the upper and lower ends of the adsorption member (3). The middle part protrudes in opposite directions and forms a diversion area (41) between the top seat (1) and the base (2) respectively. The diversion area (41) is provided with a diversion member (45) that is connected to the sealing member (4) in the outer periphery. The middle part of the diversion member (45) on the upper and lower sides protrudes in opposite directions to form a diversion part (451). The far side is separated from the upper through hole (121) and the lower through hole (221) respectively. The side wall of the diversion part (451) is provided with a plurality of diversion holes (452) circumferentially spaced through. The near side of the upper and lower sealing members (4) is provided with a plurality of diversion channels (42) that connect the diversion holes (452) and the adsorption chamber (31).

4. A modular nitrogen generator as described in claim 1, characterized in that, Several sets of top seats (1) and bases (2) extend forward and backward and are arranged side by side. Several adsorption components (3) extend vertically and are arranged in an array between a set of top seats (1) and bases (2). Several nitrogen generating modules (7) are connected to a control cabinet (6) on the front and a fixing plate on the rear. The air inlet assembly (62) and the air outlet assembly (61) are both located inside the control cabinet (6).

5. A modular nitrogen generator as described in claim 4, characterized in that, The gas outlet assembly (61) is connected to the gas inlet of the corresponding gas storage tank (8). The control cabinet (6) is equipped with a gas return assembly (63). The gas return assembly (63) includes a gas return pipeline (631) connected to the gas outlet of the gas storage tank (8), an exhaust pipeline (632) connected to the gas return pipeline (631) and controlled to open and close by an exhaust valve (633), a finished product pipeline (634) connected to the gas return pipeline (631) and controlled to open and close by a finished product valve (635), and a purity detection device for detecting the purity of nitrogen in the gas return pipeline (631).

6. A modular nitrogen generator as described in claim 1, characterized in that, One end of several of the bases (2) is provided with a pressure relief and exhaust device (23) for relieving pressure and exhausting air, and the exhaust end of the pressure relief and exhaust device (23) is connected to a muffler (24).

7. A modular nitrogen generator as described in claim 4, characterized in that, The adsorption element (3) is a cylindrical shape with sealing elements (4) fitted at both the upper and lower ends. The outer peripheries of the sealing elements (4) on the upper and lower sides are folded towards each other to form restricted portions (43) that are fixedly fastened to the outer walls of the upper and lower ends of the adsorption element (3). The top seat (1) and the base (2) are respectively provided with several pairs of upper limit portions (13) and several pairs of lower limit portions (25) that are raised and folded towards each other on the opposite sides. An upper limit area (12) is formed between each pair of upper limit portions (13) that is adapted to the restricted portions (43) on the upper end and upper side of the adsorption element (3). An upper limit area (12) is formed between each pair of lower limit portions (25) that is adapted to the restricted portions (43) on the upper end and upper side of the adsorption element (3). The restricted part (43) is adapted to the lower limit area (22), and the several upper limit areas (12) and several lower limit areas (22) distributed in front and behind are coaxially connected. A set of nitrogen generation modules (7) also includes several connecting rods (5) that pass through the top seat (1) and the base (2) with upper and lower sealing. After the upper and lower ends of several adsorption elements (3) are slidably inserted into the corresponding upper limit area (12) and lower limit area (22) through the restricted part (43) on the upper and lower sides, the upper and lower ends of several connecting rods (5) are locked and fixed so that the sealing elements (4) on the upper and lower sides respectively seal against the top seat (1) and the base (2).

8. A modular nitrogen generator as described in claim 7, characterized in that, A plurality of connecting rods (5) are arranged in an array, and the plurality of connecting rods (5) are arranged in pairs, corresponding to the gaps between adjacent adsorption members (3) in the left and right directions. Two limiting blocks (51) are slidably sleeved on the pairs of connecting rods (5). The front and rear sides of the limiting blocks (51) are recessed with abutting parts (511) that are adapted to the adjacent limiting parts (43). The upper limiting block (51) is used to be inserted between two pairs of adjacent upper limiting parts (13) and the abutting part (511) is limited to abutting between the upper ends of the adjacent adsorption members (3). The lower limiting block (51) is used to be inserted between two pairs of adjacent lower limiting parts (25) and the abutting part (511) is limited to abutting between the lower ends of the adjacent adsorption members (3).

9. A modular nitrogen generator as described in claim 8, characterized in that, The sealing elements (4) on the upper and lower sides are respectively recessed with sealing grooves (44), and sealing rings are embedded in the sealing grooves (44). After the upper and lower ends of the connecting rods (5) are locked and fixed, the sealing rings are deformed by pressure and sealed between the top seat (1) and the base (2) and the corresponding sealing grooves (44).

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