Nitrogen purification device

Abstract

The utility model discloses a nitrogen purification device, which relates to the technical field of nitrogen purification, and comprises a bottom plate and a molecular sieve box, the top of the bottom plate is provided with an air compressor, the top of the bottom plate is provided with a PS particulate filter, the air compressor is connected with the PS particulate filter through a pipeline, the top of the bottom plate is provided with two support legs, and the support legs are connected with the molecular sieve box through a pipeline. A purification box is arranged between the two supporting legs, a positioning mechanism used for installing and positioning a molecular sieve box is arranged on the purification box, the positioning mechanism is arranged on the molecular sieve box, a fixing mechanism used for fixing the molecular sieve box after the molecular sieve box is installed is arranged on the purification box, and two connecting pipes are arranged on the purification box. One of the connecting pipes is connected with the PS particulate filter, the positioning mechanism comprises a fixing plate, and the fixing plate is fixedly mounted at the top of the molecular sieve box, so that the molecular sieve box is convenient to mount and dismount, a carbon molecular sieve in the molecular sieve box is convenient to replace, the operation is simple, and the practicability is high.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen purification technology, specifically to a nitrogen purification device. Background Technology

[0002] Nitrogen is a colorless and odorless gas with the chemical formula N2. Under normal conditions, its density is less than that of air, and it constitutes 78.08% of the total atmosphere (by volume), making it one of the main components of air. Nitrogen purification refers to the process of separating high-purity nitrogen with a low oxygen molecular ratio using technology to meet quality requirements. It utilizes elements such as oxygen, nitrogen, and carbon dioxide in the air, separating nitrogen from a gas mixture through physical and chemical separation principles. Nitrogen purification typically involves various methods and technologies, such as air condensation, activated carbon adsorption, air molecular sieves, and pressure swing adsorption (PSA). The choice of these methods depends on the required nitrogen purity and the application scenario.

[0003] In existing technologies, nitrogen purification devices are used to purify nitrogen from the air. Most nitrogen purification devices employ pressure swing adsorption (PSA), a method that separates gases by utilizing the difference in selective adsorption capacity of an adsorbent under different pressures. Carbon molecular sieves are used as the adsorbent, typically loaded and fixed inside the device in a molecular sieve box, usually secured with bolts. When the carbon molecular sieves become saturated after prolonged use, they need to be replaced. Due to the bolted connection, specific tools may be required, and care must be taken to ensure that the equipment is not damaged during disassembly. If the bolts become difficult to remove due to prolonged use or corrosion, the disassembly process may become even more difficult and time-consuming. Furthermore, precise alignment and tightening are required during installation, making the operation quite cumbersome.

[0004] Therefore, a nitrogen purification device is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a nitrogen purification device in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] A nitrogen purification device includes a base plate and a molecular sieve box. An air compressor and a PS particulate filter are installed on the top of the base plate, and the air compressor and the PS particulate filter are connected by a pipe. Two support legs are provided on the top of the base plate, and a purification box is arranged between the two support legs. The purification box is provided with a positioning mechanism for installing and positioning the molecular sieve box, and the positioning mechanism is arranged on the molecular sieve box. The purification box is also provided with a fixing mechanism for fixing the molecular sieve box after installation. Two connecting pipes are provided on the purification box, and one of the connecting pipes is connected to the PS particulate filter.

[0008] Furthermore, the positioning mechanism includes a fixing plate, which is fixedly installed on the top of the molecular sieve box. The purification box has a positioning groove, and the molecular sieve box is slidably installed on the inner wall of the positioning groove and is adapted to the fixing plate.

[0009] Furthermore, the top of the fixing plate has a through hole, and the top of the fixing plate has a threaded groove, on which a sealing plug is threadedly installed.

[0010] Furthermore, the fixing mechanism includes a fixing rod, which is fixedly installed at the bottom of the purification box. A bidirectional lead screw is rotatably installed inside the fixing rod. Two movable rods are threaded on the outer wall of the bidirectional lead screw, and the movable rods are slidably installed on the fixing rod. The right end of the bidirectional lead screw extends outside the fixing rod, and a torsion handle is fixedly installed on the surface of the extended end of the bidirectional lead screw.

[0011] Furthermore, a baffle plate is fixedly installed on the surface of each of the two movable rods, and the baffle plate is slidably installed on the surface of the purification box, with the baffle plate in contact with the fixed plate.

[0012] Furthermore, a sealing strip is provided at the bottom of the fixing plate, and the surfaces of the fixing plate and the two shielding plates are all set as arc-shaped surfaces.

[0013] The beneficial effects of this utility model are as follows:

[0014] This invention, through the arrangement of a fixed plate, a bidirectional screw, and baffle plates, allows for efficient operation. In use, carbon molecular sieves are loaded into a molecular sieve box and then sealed with a plug. The molecular sieve box is then inserted into a positioning groove. Rotating the torsion handle drives the bidirectional screw, causing the two moving rods to move closer together. The two baffle plates move accordingly, and their arc-shaped surfaces slide on the arc-shaped surface of the fixed plate. When the arc-shaped surfaces are misaligned, the two baffle plates apply pressure to the fixed plate, ensuring a tight seal between the sealing strip and the positioning groove, thus fixing the molecular sieve box and sealing the purification chamber. Outside air is then pressurized by an air compressor and sent to a PS particulate filter for pretreatment to remove moisture, oil, and other impurities, ensuring safe entry into the separation system. The air is clean and meets the requirements. After pretreatment, the compressed air enters the purification chamber. The molecular sieve box contains carbon molecular sieves. During pressure swing adsorption, the carbon molecular sieves selectively adsorb gases such as oxygen and carbon dioxide based on the differences in adsorption capacity of different gas molecules. Nitrogen, due to its weak affinity for the molecular sieves, flows out, thus purifying the nitrogen. After a period of use, the carbon molecular sieves in the molecular sieve box will become saturated and need to be replaced. By disengaging the two baffles from the fixed plate, the molecular sieve box can be removed. Then, by releasing the sealing plug, the carbon molecular sieves can be poured out of the molecular sieve box. This facilitates the installation and disassembly of the molecular sieve box and the replacement of the carbon molecular sieves inside. The operation is simple and highly practical. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the support leg of this utility model;

[0017] Figure 3 This is a schematic diagram of the molecular sieve box of this utility model.

[0018] Reference numerals: 1. Base plate; 2. Air compressor; 3. PS particulate filter; 4. Support leg; 5. Purification box; 6. Positioning mechanism; 601. Positioning groove; 602. Fixing plate; 603. Sealing plug; 7. Molecular sieve box; 8. Fixing mechanism; 801. Fixing rod; 802. Bidirectional lead screw; 803. Moving rod; 804. Baffle plate; 805. Torque handle; 9. Connecting pipe. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] The electrical components mentioned in this article are all connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can be used for control.

[0023] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. 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.

[0024] like Figure 1-3As shown, a nitrogen purification device includes a base plate 1 and a molecular sieve box 7. An air compressor 2 is installed on the top of the base plate 1, and a PS particulate filter 3 is also installed on the top of the base plate 1. The air compressor 2 and the PS particulate filter 3 are connected by a pipe. Two support legs 4 are installed on the top of the base plate 1, and a purification chamber 5 is installed between the two support legs 4. The purification chamber 5 is equipped with a positioning mechanism 6 for positioning the molecular sieve box 7 during installation, and a fixing mechanism 8 for securing the molecular sieve box 7 after installation. The purification chamber 5 is equipped with two connecting pipes 9, one of which is connected to the PS particulate filter 3. In this embodiment, during use, outside air is pressurized by the air compressor 2 and then delivered to the PS particulate filter 3 for pretreatment to remove moisture. The air entering the separation system is clean and meets requirements by removing impurities such as oil and grease. The pre-treated compressed air then enters the purification chamber 5, where the molecular sieve box 7 contains carbon molecular sieves. During pressure swing adsorption (PSA), the carbon molecular sieves selectively adsorb gases such as oxygen and carbon dioxide based on the differences in adsorption capacity of different gas molecules. Nitrogen, due to its weak affinity for the molecular sieves, flows out, thus purifying the nitrogen. After a period of use, the carbon molecular sieves in the molecular sieve box 7 will become saturated and need to be replaced. At this time, the limiting mechanism 6 can be released by the fixing mechanism 8. Because of the positioning mechanism 6, the molecular sieve box 7 can be directly removed, and the carbon molecular sieves inside can be replaced. This facilitates the installation and disassembly of the molecular sieve box 7 and the replacement of the internal carbon molecular sieves. The operation is simple and highly practical.

[0025] like Figure 1-3 As shown, the positioning mechanism 6 includes a fixing plate 602, which is fixedly installed on the top of the molecular sieve box 7. The purification box 5 has a positioning groove 601, and the molecular sieve box 7 is slidably installed on the inner wall of the positioning groove 601 and is adapted to the fixing plate 602. In this embodiment, the positioning installation is completed by inserting the molecular sieve box 7 into the positioning groove 601 and with the cooperation of the fixing plate 602.

[0026] like Figure 3 As shown, the top of the fixing plate 602 has a through hole and a threaded groove. A sealing plug 603 is threaded onto the inner wall of the threaded groove. In this embodiment, the threaded groove and the sealing plug 603 facilitate the replacement of the carbon molecular sieve inside the molecular sieve box 7.

[0027] like Figure 1-3As shown, the fixing mechanism 8 includes a fixing rod 801, which is fixedly installed at the bottom of the purification box 5. A bidirectional lead screw 802 is rotatably installed inside the fixing rod 801. Two moving rods 803 are threadedly installed on the outer wall of the bidirectional lead screw 802, and the moving rods 803 are slidably installed on the fixing rod 801. The right end of the bidirectional lead screw 802 extends outside the fixing rod 801, and a torsion handle 805 is fixedly installed on the surface of the extended end of the bidirectional lead screw 802. In this embodiment, by rotating the torsion handle 805, the bidirectional lead screw 802 is driven to rotate, causing the two moving rods 803 to move closer to each other or further away from each other, thereby adjusting the distance between the two moving rods 803.

[0028] like Figure 2-3 As shown, a baffle plate 804 is fixedly installed on the surface of each of the two moving rods 803, and the baffle plate 804 is slidably installed on the surface of the purification box 5. The baffle plate 804 is in contact with the fixed plate 602. In this embodiment, when the two moving rods 803 move closer to each other, the two baffle plates 804 move accordingly and move to directly above the fixed plate 602, limiting the fixed plate 602.

[0029] like Figure 3 As shown, a sealing strip is provided at the bottom of the fixing plate 602. The surfaces of the fixing plate 602 and the two baffle plates 804 are all set as arc-shaped surfaces. In this embodiment, when the two baffle plates 804 move closer to each other, the arc-shaped surfaces of the two baffle plates 804 will slide on the arc-shaped surface of the fixing plate 602. When the arc-shaped surfaces are misaligned, the two baffle plates 804 apply pressure to the fixing plate 602, so that the sealing strip and the positioning groove 601 are tightly fitted, thereby improving the sealing performance.

[0030] In summary, during operation, outside air is pressurized by air compressor 2 and then delivered to PS particulate filter 3 for pretreatment to remove impurities such as moisture and oil, ensuring that the air entering the separation system is clean and meets requirements. The pretreated compressed air then enters purification chamber 5, where molecular sieve box 7 contains carbon molecular sieves. During pressure swing adsorption (PSA), the carbon molecular sieves selectively adsorb gases such as oxygen and carbon dioxide based on the differences in adsorption capacity of different gas molecules. Nitrogen, due to its weak affinity for the molecular sieves, flows out, thus purifying the nitrogen. After a period of use, the carbon molecular sieves in molecular sieve box 7 will become saturated and need to be replaced. At this point, the limiting mechanism 6 can be released by fixing mechanism 8. Due to the positioning mechanism 6, molecular sieve box 7 can be directly removed, and the carbon molecular sieves inside can be replaced, facilitating the installation and removal of molecular sieve box 7. The replacement of the internal carbon molecular sieve is simple and highly practical. Positioning and installation are completed by inserting the molecular sieve box 7 into the positioning groove 601 and cooperating with the fixing plate 602. The threaded groove and sealing plug 603 facilitate the replacement of the carbon molecular sieve inside the molecular sieve box 7. Rotating the torsion handle 805 drives the bidirectional lead screw 802 to rotate, causing the two moving rods 803 to move closer or further apart, thus adjusting the distance between the two moving rods 803. As the two moving rods 803 move closer, the two baffle plates 804 move accordingly, moving directly above the fixing plate 602 and limiting its position. When the two baffle plates 804 move closer, their arc-shaped surfaces slide on the arc-shaped surface of the fixing plate 602. When the arc-shaped surfaces are misaligned, the two baffle plates 804 apply pressure to the fixing plate 602, causing the sealing strip to fit tightly against the positioning groove 601, improving sealing performance.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A nitrogen purification device, comprising a base plate (1) and a molecular sieve box (7), wherein an air compressor (2) is disposed on the top of the base plate (1), and a PS particulate filter (3) is disposed on the top of the base plate (1), and the air compressor (2) and the PS particulate filter (3) are connected by a pipeline, characterized in that, The base plate (1) has two support legs (4) on its top, and a purification box (5) is provided between the two support legs (4). The purification box (5) is provided with a positioning mechanism (6) for installing and positioning the molecular sieve box (7), and the positioning mechanism (6) is provided on the molecular sieve box (7). The purification box (5) is provided with a fixing mechanism (8) for fixing the molecular sieve box (7) after installation. The purification box (5) is provided with two connecting pipes (9), and one of the connecting pipes (9) is connected to the PS particulate filter (3).

2. The nitrogen purification device according to claim 1, characterized in that, The positioning mechanism (6) includes a fixing plate (602), which is fixedly installed on the top of the molecular sieve box (7). The purification box (5) is provided with a positioning groove (601), and the molecular sieve box (7) is slidably installed on the inner wall of the positioning groove (601) and is adapted to the fixing plate (602).

3. The nitrogen purification device according to claim 2, characterized in that, The top of the fixing plate (602) has a through hole, and the top of the fixing plate (602) has a threaded groove, on which a sealing plug (603) is threadedly installed.

4. The nitrogen purification device according to claim 3, characterized in that, The fixing mechanism (8) includes a fixing rod (801), which is fixedly installed at the bottom of the purification box (5). A bidirectional lead screw (802) is rotatably installed inside the fixing rod (801). Two moving rods (803) are threaded on the outer wall of the bidirectional lead screw (802), and the moving rods (803) are slidably installed on the fixing rod (801). The right end of the bidirectional lead screw (802) extends outside the fixing rod (801), and a torsion handle (805) is fixedly installed on the surface of the extended end of the bidirectional lead screw (802).

5. A nitrogen purification apparatus according to claim 4, characterized in that, A baffle plate (804) is fixedly installed on the surface of each of the two moving rods (803), and the baffle plate (804) is slidably installed on the surface of the purification box (5), and the baffle plate (804) is in contact with the fixed plate (602).

6. A nitrogen purification apparatus according to claim 5, characterized in that, The bottom of the fixing plate (602) is provided with a sealing strip, and the surfaces of the fixing plate (602) and the two shielding plates (804) are all provided with arc-shaped surfaces.

Images