Portable nitrogen-oxygen separator

Abstract

The invention provides a portable nitrogen-oxygen separator, and belongs to the technical field of nitrogen-oxygen separation. According to the structure, a first-stage membrane separator is arranged in a control box, the non-permeation end of the first-stage membrane separator is connected to the non-permeation end of a second-stage membrane separator through a first input pipe, the permeation end of the first-stage membrane separator is connected to a nitrogen output pipe through a second input pipe, an outer extending pipe serving as a bypass is arranged in the control box, and the outer extending pipe is connected to the nitrogen output pipe through a second input pipe. A safety valve is arranged in the outer extending pipe, a drawing box is arranged in the rough filtering box, a filtering material is arranged in the drawing box, a pin head is rotationally connected in the control box, the pin head is located at the intersection of the first input pipe and the second input pipe, and a one-way overflowing hole is formed in the pin head. A two-stage membrane separation system is adopted, and oxygen subjected to primary separation can be directly output and can also enter a secondary membrane separation device for secondary separation. In addition, a controllable gas passage is constructed, and a pulse type gas inlet mode is designed, so that the separation efficiency is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of nitrogen-oxygen separation, and particularly to a portable nitrogen-oxygen separator. Background Art

[0002] Nitrogen-oxygen separation is the process of separating nitrogen and oxygen in air. This technology is usually applied to air separation equipment to produce high-purity oxygen or nitrogen. Nitrogen-oxygen separation is based on the size difference of gas molecules and the principle of molecular sieve. Through the selective adsorption of molecular sieve, nitrogen molecules are larger than oxygen molecules, so nitrogen molecules will be blocked by the molecular sieve, while oxygen molecules can pass through the molecular sieve, thus achieving separation. Nitrogen-oxygen separation technologies include cryogenic air separation method and membrane separation method. Among them, the cryogenic air separation method liquefies air by lowering its temperature, and then separates them by using the boiling point difference between nitrogen and oxygen. The boiling point of nitrogen is -195.8 °C, and the boiling point of oxygen is -183 °C. They can be purified separately by fractional distillation. The membrane separation method separates by using the different diffusion rates of oxygen and nitrogen in a non-porous polymer membrane. Since the volume of oxygen molecules is smaller than that of nitrogen molecules, the diffusion rate of oxygen in the polymer membrane is greater than that of nitrogen, thus achieving separation. At present, small nitrogen-oxygen separation equipment generally adopts the membrane separation method, which has the advantages of compact equipment, simple operation, and is suitable for on-site nitrogen production and mobile nitrogen production. However, currently, conventional portable nitrogen-oxygen separators generally have a single-stage separation structure. Although the separation efficiency is guaranteed, the purity is relatively low. In this case, increasing the separation stage can improve the purity level, but it has a greater impact on the separation pressure and gas flux. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: how to design a portable nitrogen-oxygen separator that can control the separation stage and flexibly control the gas flux.

[0004] To achieve the above technical objectives, the present invention adopts the following technical solutions: A portable nitrogen-oxygen separator, comprising an inner chamber, an oxygen output pipe, a nitrogen output pipe, a first input pipe, a second input pipe, a branch pipe, a coarse filter box, filter media, a drawer box, a port pipe, an outer extension pipe, a control box, a pin head, a connecting column, and a driven gear. Among them, a secondary membrane separator is provided in the inner chamber. An oxygen output pipe is connected to the non-permeating end of the secondary membrane separator, and a nitrogen output pipe is connected to the permeating end of the secondary membrane separator. The port pipe is sequentially connected to the control box through the coarse filter box and the branch pipe. A primary membrane separator is provided in the control box. The non-permeating end of the primary membrane separator is connected to the non-permeating end of the secondary membrane separator through the first input pipe, and the permeating end of the primary membrane separator is connected to the nitrogen output pipe through the second input pipe. An outer extension pipe serving as a bypass is provided in the control box, and a safety valve is provided in the outer extension pipe. A drawer box is provided in the coarse filter box, and filter media is provided in the drawer box. A pin head is rotatably connected in the control box. The pin head is located at the intersection of the first input pipe and the second input pipe. A one-way flow hole is provided on the pin head. A connecting column is fixedly connected to the pin head, and a driven gear is fixedly connected to the connecting column. The driven gear is located outside the control box.

[0005] Preferably, there are two control boxes, and the two control boxes are respectively located on both sides of the inner chamber.

[0006] Preferably, a control valve is provided at the connection between the branch pipe and the control box. The control valve includes a frame body, a sliding plate, a connecting rod, a long-hole ring, a motor, a turntable, and a protruding rod. Among them, the frame body is fixedly arranged. A sliding plate is slidably connected to the frame body. The sliding plate intercepts the branch pipe. A connecting rod is connected to the sliding plate. A long-hole ring is fixedly connected to the connecting rod. A turntable is connected to the motor. A protruding rod is connected to the turntable. The protruding rod is slidably matched with the long-hole ring.

[0007] Preferably, an electric cylinder is provided at the connection between the second input pipe and the control box, and a valve plate is connected to the free end of the electric cylinder.

[0008] Preferably, it further includes a transmission shaft, and a driving gear is connected to the transmission shaft. The driving gear is engaged with the driven gear.

[0009] Preferably, a housing is provided outside the portable nitrogen-oxygen separator, and a plurality of casters are provided at the bottom end of the housing.

[0010] Preferably, both the oxygen output pipe and the nitrogen output pipe are flexible hoses, and one-way valves are provided on the oxygen output pipe and the nitrogen output pipe.

[0011] Preferably, a bracket is fixedly connected inside the nitrogen-oxygen separator, and the inner chamber and the control box are both fixedly arranged on the bracket.

[0012] Preferably, sliding grooves are provided on the inner wall of the coarse filter box, and the drawer box is slidably connected to the sliding grooves.

[0013] Preferably, a pipeline groove is provided inside the nitrogen oxygen separator, and each pipeline is fixed in the pipeline groove.

[0014] In the above technical scheme, the inner chamber is used to set up a secondary membrane separator, oxygen as the non-permeated part is output through the oxygen output pipe, and nitrogen as the permeated part is output through the nitrogen output pipe; the port pipe is used to introduce air into the present invention, and the air first enters the coarse filter box, and enters the branch pipe after being filtered by the filter material in the coarse filter box, and then reaches the control box; the filter material in the coarse filter box is installed in the pull-out box, and the filter material is replaced by the pull-out action, which is not only simple to operate but also has high efficiency. The non-permeated end of the primary membrane separator is connected to the non-permeated end of the secondary membrane separator through the first input pipe, so that the oxygen that is not fully separated can be separated twice; the permeated end of the primary membrane separator is connected to the nitrogen output pipe through the second input pipe, so that the nitrogen obtained by the primary separation is directly output. The external extension pipe is used to set a safety valve to play an overpressure protection role. The flow hole on the pin head allows it to control the flow direction through rotation. When the flow hole faces the first input pipe, the first input pipe is connected and the second input pipe is disconnected. When the flow hole faces the second input pipe, the second input pipe is connected and the first input pipe is disconnected. The rotation of the pin head can be driven by the connecting column and the driven gear. In the preferred technical solution, the rotating disk is driven by the motor to rotate, thereby driving the protruding rod on the rotating disk to toggle the long hole ring, realizing the periodic opening and closing of the sliding plate, and realizing the pulsed air intake.

[0015] The present invention provides a portable nitrogen oxygen separator. The technical solution adopts a two-stage membrane separation system, wherein the first-stage membrane separation component is installed in the control box, and the oxygen after the first-stage separation can be directly output or enter the second-stage membrane separation device for secondary separation. In addition, the present invention constructs a controllable gas passage and designs a pulsed air intake mode, which is conducive to ensuring the separation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an external view of the present invention; Figure 2 It is the first internal diagram of the present invention; Figure 3 is the second internal view of the present invention; Figure 4 is the third internal diagram of the present invention; Figure 5 It is a partial diagram of the internal structure of the present invention; Figure 6 This is a structural diagram of the interior of the coarse filter box; Figure 7 This is the first structural diagram of the control box; Figure 8 This is the second structural diagram of the control box; Figure 9It is the third structural diagram of the control box; Figure 10 It is the structural diagram of the pin head; In the figure: Specific implementation mode

[0017] The specific implementation mode of the present invention will be described in detail below. In order to avoid excessive unnecessary details, the well-known structures or functions will not be described in detail in the following embodiments. The approximate language used in the following embodiments can be used for quantitative expressions, indicating that certain changes in quantity are allowed without changing the basic functions. Unless otherwise defined, the technical and scientific terms used in the following embodiments have the same meanings as commonly understood by those skilled in the art to which the present invention belongs.

[0018] Embodiment 1 A portable nitrogen-oxygen separator, as Figures 1 to 10 shown, includes an inner chamber 11, an oxygen output pipe 111, a nitrogen output pipe 112, a first input pipe 113, a second input pipe 12, a branch pipe 13, a coarse filter box 14, a filter material 141, a drawer box 142, a port pipe 15, an outer extension pipe 16, a control box 20, a pin head 21, a connecting column 211, and a driven gear 212. Among them, a secondary membrane separator is provided in the inner chamber 11. An oxygen output pipe 111 is connected to the non-permeating end of the secondary membrane separator, and a nitrogen output pipe 112 is connected to the permeating end of the secondary membrane separator. The port pipe 15 is sequentially connected to the control box 20 through the coarse filter box 14 and the branch pipe 13. A primary membrane separator is provided in the control box 20. The non-permeating end of the primary membrane separator is connected to the non-permeating end of the secondary membrane separator through the first input pipe 113, and the permeating end of the primary membrane separator is connected to the nitrogen output pipe 112 through the second input pipe 12. An outer extension pipe 16 serving as a bypass is provided in the control box 20, and a safety valve is provided in the outer extension pipe 16. A drawer box 142 is provided in the coarse filter box 14, and a filter material 141 is provided in the drawer box 142. The pin head 21 is rotatably connected in the control box 20. The pin head 21 is located at the intersection of the first input pipe 113 and the second input pipe 12. A one-way flow hole is provided on the pin head 21. A connecting column 211 is fixedly connected to the pin head 21, and a driven gear 212 is fixedly connected to the connecting column 211. The driven gear 212 is located outside the control box 20.

[0019] In the above technical solution, the inner chamber 11 is used to set up a secondary membrane separator, oxygen as the non-permeable part is output through the oxygen output pipe 111, and nitrogen as the permeable part is output through the nitrogen output pipe 112; the port pipe 15 is used to introduce air into the present invention, and the air first enters the coarse filter box 14, and enters the branch pipe 13 after being filtered by the filter material 141 in the coarse filter box 14, and then reaches the control box 20; the filter material 141 in the coarse filter box 14 is installed in the pull-out box 142, and the filter material is replaced by the pull-out action, which is not only simple to operate but also has high efficiency. The non-permeable end of the primary membrane separator is connected to the non-permeable end of the secondary membrane separator through the first input pipe 113, so that the oxygen that is not fully separated can be separated for the second time; the permeable end of the primary membrane separator is connected to the nitrogen output pipe 112 through the second input pipe 12, so that the nitrogen obtained by the primary separation is directly output. The external extension pipe 16 is used to set a safety valve to play an overpressure protection role. The flow hole on the pin head 21 allows the flow direction to be controlled by rotation. When the flow hole faces the first input pipe 113, the first input pipe 113 is connected and the second input pipe 12 is disconnected. When the flow hole faces the second input pipe 12, the second input pipe 12 is connected and the first input pipe 113 is disconnected. The rotation of the pin head 21 can be driven by the connecting column 211 and the driven gear 212.

[0020] Example 2 A portable nitrogen and oxygen separator, such as Figures 1 to 10As shown in the figure, it includes an inner chamber 11, an oxygen output pipe 111, a nitrogen output pipe 112, a first input pipe 113, a second input pipe 12, a branch pipe 13, a coarse filter box 14, filter media 141, a drawer box 142, a port pipe 15, an outer extension pipe 16, a control box 20, a pin head 21, a connecting column 211, and a driven gear 212. Among them, a secondary membrane separator is provided in the inner chamber 11. An oxygen output pipe 111 is connected to the non-permeating end of the secondary membrane separator, and a nitrogen output pipe 112 is connected to the permeating end of the secondary membrane separator. The port pipe 15 is sequentially connected to the control box 20 through the coarse filter box 14 and the branch pipe 13. A primary membrane separator is provided in the control box 20. The non-permeating end of the primary membrane separator is connected to the non-permeating end of the secondary membrane separator through the first input pipe 113, and the permeating end of the primary membrane separator is connected to the nitrogen output pipe 112 through the second input pipe 12. An outer extension pipe 16 serving as a bypass is provided in the control box 20, and a safety valve is provided in the outer extension pipe 16. A drawer box 142 is provided in the coarse filter box 14, and filter media 141 is provided in the drawer box 142. A pin head 21 is rotatably connected in the control box 20. The pin head 21 is located at the intersection of the first input pipe 113 and the second input pipe 12. A one-way flow hole is provided on the pin head 21. A connecting column 211 is fixedly connected to the pin head 21, and a driven gear 212 is fixedly connected to the connecting column 211. The driven gear 212 is located outside the control box 20. Among them, there are two control boxes 20, and the two control boxes 20 are respectively located on both sides of the inner chamber 11. A control valve is provided at the connection between the branch pipe 13 and the control box 20. The control valve includes a frame body 22, a sliding plate 23, a connecting rod 231, a long hole ring 232, a motor 25, a turntable 251, and a protruding rod 252. Among them, the frame body 22 is fixedly arranged. A sliding plate 23 is slidably connected to the frame body 22. The sliding plate 23 intercepts the branch pipe 13. A connecting rod 231 is connected to the sliding plate 23, and a long hole ring 232 is fixedly connected to the connecting rod 231. A turntable 251 is connected to the motor 25, and a protruding rod 252 is connected to the turntable 251. The protruding rod 252 is slidably matched with the long hole ring 232. An electric cylinder 24 is provided at the connection between the second input pipe 12 and the control box 20, and a valve plate is connected to the free end of the electric cylinder 24. It further includes a transmission shaft 26, and a driving gear 261 is connected to the transmission shaft 26. The driving gear 261 is engaged with the driven gear 212. An outer shell 10 is provided outside the portable nitrogen-oxygen separator, and a plurality of casters 101 are provided at the bottom end of the outer shell 10. Both the oxygen output pipe 111 and the nitrogen output pipe 112 are flexible hoses, and one-way valves are provided on the oxygen output pipe 111 and the nitrogen output pipe 112. A bracket is fixedly connected inside the nitrogen-oxygen separator, and the inner chamber 11 and the control box 20 are both fixedly arranged on the bracket. A slideway is provided on the inner wall of the coarse filter box 14, and the drawer box 142 is slidably connected to the slideway. A pipeline groove is provided inside the nitrogen-oxygen separator, and each pipeline is fixed in the pipeline groove.In the above technical solution, the motor 25 drives the turntable 251 to rotate, thereby driving the protruding rod 252 on the turntable 251 to toggle the long-hole ring 232, realizing the periodic opening and closing of the sliding plate 23 and achieving pulsed air intake.

[0021] The above has described the embodiments of the present invention in detail, but the described content is only the preferred embodiments of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the scope of the application of the present invention shall be included within the protection scope of the present invention.

Claims

1. A portable nitrogen and oxygen separator, characterized in that The invention comprises an inner chamber (11), an oxygen output pipe (111), a nitrogen output pipe (112), a first input pipe (113), a second input pipe (12), a branch pipe (13), a coarse filter box (14), a filter material (141), a pull-out box (142), a port pipe (15), an external extension pipe (16), a control box (20), a pin head (21), a connecting column (211), and a driven gear (212), wherein a secondary membrane separator is provided in the inner chamber (11), the non-permeable end of the secondary membrane separator is connected to the oxygen output pipe (111), the permeable end of the secondary membrane separator is connected to the nitrogen output pipe (112), the port pipe (15) is connected to the control box (20) via the coarse filter box (14) and the branch pipe (13), and a primary membrane separator is provided in the control box (20), the non-permeable end of the primary membrane separator is connected to the oxygen output pipe (111), and the permeable end of the secondary membrane separator is connected to the nitrogen output pipe (112), the port pipe (15) is connected to the control box (20) via the coarse filter box (14) and the branch pipe (13) in sequence, and the primary membrane separator is provided in the control box (20), and the non-permeable end of the primary membrane separator is connected to the nitrogen output pipe (112) via the second membrane separator. An input pipe (113) is connected to the non-permeated end of the secondary membrane separator, and the permeated end of the primary membrane separator is connected to the nitrogen output pipe (112) through the second input pipe (12). An external extension pipe (16) serving as a bypass is provided in the control box (20), and a safety valve is provided in the external extension pipe (16). A pull-out box (142) is provided in the coarse filter box (14), and a filter material (141) is provided in the pull-out box (142). A pin head (21) is rotatably connected in the control box (20), and the pin head (21) is located at the intersection of the first input pipe (113) and the second input pipe (12). A one-way flow hole is provided on the pin head (21), and a connecting column (211) is fixedly connected to the pin head (21), and a driven gear (212) is fixedly connected to the connecting column (211), and the driven gear (212) is located outside the control box (20).

2. A portable nitrogen oxygen separator according to claim 1, characterized in that: Two control boxes (20) are provided, and the two control boxes (20) are respectively located on two sides of the inner compartment (11).

3. A portable nitrogen oxygen separator according to claim 1, characterized in that: A control valve is provided at the connection between the branch pipe (13) and the control box (20), the control valve comprising a frame (22), a sliding plate (23), a connecting rod (231), a long hole ring (232), a motor (25), a rotating disk (251), and a protruding rod (252), wherein the frame (22) is fixedly arranged, the sliding plate (23) is slidably connected to the frame (22), the sliding plate (23) is intercepted on the branch pipe (13), the connecting rod (231) is connected to the sliding plate (23), the long hole ring (232) is fixedly connected to the connecting rod (231), the rotating disk (251) is connected to the motor (25), the protruding rod (252) is connected to the rotating disk (251), and the protruding rod (252) is slidably matched with the long hole ring (232).

4. A portable nitrogen and oxygen separator according to claim 1, characterized in that: An electric cylinder (24) is provided at the connection between the second input pipe (12) and the control box (20), and a valve plate is connected to the free end of the electric cylinder (24).

5. A portable nitrogen oxygen separator according to claim 1, characterized in that: It also includes a transmission shaft (26), to which a driving gear (261) is connected, and the driving gear (261) and the driven gear (212) cooperate with each other.

6. A portable nitrogen oxygen separator according to claim 1, characterized in that: A shell (10) is provided on the outside of the portable nitrogen and oxygen separator, and a plurality of casters (101) are provided at the bottom end of the shell (10).

7. A portable nitrogen and oxygen separator according to claim 1, characterized in that: The oxygen output pipe (111) and the nitrogen output pipe (112) are both hoses, and one-way valves are provided on the oxygen output pipe (111) and the nitrogen output pipe (112).

8. A portable nitrogen and oxygen separator according to claim 1, characterized in that: A bracket is fixedly connected inside the nitrogen and oxygen separator, and the inner chamber (11) and the control box (20) are both fixedly arranged on the bracket.

9. A portable nitrogen and oxygen separator according to claim 1, characterized in that: A slideway is provided on the inner wall of the coarse filter box (14), and the drawer box (142) is slidably connected to the slideway.

10. The portable nitrogen and oxygen separator according to claim 1, characterized in that: A pipeline groove is provided inside the nitrogen and oxygen separator, and each pipeline is fixed in the pipeline groove.

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