A low-pressure oil-free medical molecular sieve oxygen generator special nitrogen exhaust machine

Abstract

This utility model relates to the field of nitrogen removal in oxygen generation equipment, specifically a Roots-type low-pressure oil-free medical molecular sieve oxygen generator nitrogen removal machine. It includes a protective shell, an inlet pipe fixedly connected to the middle of the protective shell, an exhaust pipe fixedly connected to one side of the inlet pipe in the middle of the protective shell, a movable plate slidably connected to the bottom side of the middle of the protective shell, a Roots-type vacuum pump fixedly connected to the top of the movable plate by bolts, a protective plate fixedly connected to the top side of the end of the movable plate, the outer wall of the protective plate contacting the middle of the protective shell, a support assembly provided at the end of the movable plate, and a rotating rod rotatably connected to the middle of the protective plate. This utility model, through the arrangement of the rotating rod, threaded rod, arc-shaped plate, rectangular plate, connecting plate, insertion pipe, and the cooperation between the protective plate and the movable plate, allows for quick connection between the Roots-type vacuum pump, the inlet pipe, and the exhaust pipe, without requiring employees to enter the middle of the protective shell for operation, thus improving convenience.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen removal in oxygen generation equipment, specifically a Roots-type low-pressure oil-free medical molecular sieve oxygen generator with dedicated nitrogen removal function. Background Technology

[0002] Medical molecular sieve oxygen generation technology utilizes the preferential adsorption characteristics of molecular sieves for nitrogen. Under certain pressure, air is passed through a molecular sieve bed, nitrogen is adsorbed, and the remaining gas is high-purity oxygen. However, the adsorption capacity of molecular sieves is limited. When the adsorption is saturated, a nitrogen purging machine is needed to remove the nitrogen to ensure the continuous and stable operation of the oxygen generation process. Some nitrogen purging machines use a Roots-type low-pressure oil-free pump body to remove nitrogen, which has stable flow and small pressure fluctuations, and can meet the "continuous" nitrogen removal requirements of the oxygen generation system.

[0003] A search revealed Chinese Patent Publication No. CN 205917027 U, which discloses a Roots-type low-pressure oil-free medical molecular sieve oxygen generator with nitrogen removal function. This invention relates to the field of oxygen generation equipment technology and includes a frame and a Roots vacuum pump mounted on the frame. The Roots vacuum pump has an inlet pipe and an outlet pipe connected to its two ends, respectively. An inlet silencer is installed on the inlet pipe, and a primary outlet silencer is installed on the outlet pipe. A secondary outlet silencer is connected to the outlet end of the outlet pipe, and a vacuum interface is connected to the secondary outlet silencer. The Roots vacuum pump is enclosed in a housing with an inlet silencer channel and a cooling device. This invention effectively cools the nitrogen generator during operation and reduces noise, facilitating oxygen generation using medical molecular sieves.

[0004] In the aforementioned technology, the Roots vacuum pump installed in the nitrogen purging machine, by means of a housing, can ensure the stability of nitrogen purging and also protect the Roots vacuum pump. However, when installing or disassembling the Roots vacuum pump for maintenance, workers need to enter the housing to operate. The space in the middle of the housing is too small, making operation inconvenient. Furthermore, most Roots vacuum pumps are fixed by multiple sets of bolts, resulting in low efficiency of disassembly and installation. Therefore, to address the above problems, a Roots-type low-pressure oil-free medical molecular sieve oxygen generator-specific nitrogen purging machine is proposed. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology and solve at least one of the technical problems mentioned in the background art, this utility model proposes a Roots-type low-pressure oil-free medical molecular sieve oxygen generator with nitrogen removal function.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a Roots-type low-pressure oil-free medical molecular sieve oxygen generator and nitrogen removal machine, including a protective shell, an air inlet pipe fixedly connected to the middle of the protective shell, an exhaust pipe fixedly connected to one side of the air inlet pipe in the middle of the protective shell, a movable plate slidably connected to the bottom side of the middle of the protective shell, a Roots-type vacuum pump fixedly connected to the top of the movable plate by bolts, a protective plate fixedly connected to the top side of the end of the movable plate, the outer wall of the protective plate contacting the middle of the protective shell, a support assembly provided at the end of the movable plate, and a rotating part rotatably connected to the middle of the protective plate. The rotating rod has a threaded rod fixedly connected to its end by bolts. An arc-shaped plate is threadedly connected to the outer wall of the threaded rod. The arc-shaped plate is slidably connected to the side wall of the Roots vacuum pump. A rectangular plate is fixedly connected to the side wall of the arc-shaped plate. A connecting plate is rotatably connected to the side wall of the rectangular plate. An inlet connecting pipe is fixedly connected to the top of the Roots vacuum pump. An exhaust connecting pipe is fixedly connected to the side wall of the Roots vacuum pump. A connector is slidably connected to the middle of the inlet connecting pipe. The other end of the connecting plate is rotatably connected to the outer wall of the connector. The outer wall of the other end of the connector contacts the middle of the inlet pipe.

[0007] Preferably, the support assembly includes a fixed block, which is fixedly connected to the end of the movable plate. A telescopic rod is rotatably connected to the inner wall of the bottom of the fixed block, and a hinge block is rotatably connected to the other end of the telescopic rod. The hinge block is fixedly connected to the side wall of the bottom of the protective shell. A toothed groove is formed on the top side of the end of the telescopic rod, and a gear is in contact with the middle of the toothed groove. The gear is located in the middle of the fixed block, and a round rod is fixedly connected to the top of the gear. A connecting plate is fixedly connected to the top of the round rod, and the outer wall of the round rod is slidably connected to the middle of the fixed block. A spring is sleeved on the outer wall of the round rod, with one end of the spring fixedly connected to the top of the gear and the other end of the spring fixedly connected to the middle of the fixed block.

[0008] Preferably, multiple sets of rectangular plates, connecting plates, and rotating rods are provided. Multiple sets of rectangular plates and connecting plates are provided on the side wall of the other end of the arc-shaped plate. The outer walls of multiple sets of insertion pipes slide on the middle of the exhaust connecting pipe. The outer walls of the other end of multiple sets of insertion pipes contact the inner wall of the exhaust pipe end.

[0009] Preferably, the Roots vacuum pump has a sliding groove on its side wall, and a movable block is fixedly connected to the side wall of the arc plate. The outer wall of the movable block is slidably connected to the middle of the sliding groove.

[0010] Preferably, the bottom side and the inner side of the bottom of the air intake pipe are provided with sealing grooves, and the top of the insertion pipe and the outer wall of the top are fixed with annular sealing rings, which contact the middle of the sealing groove.

[0011] Preferably, the fixing block has a toothed groove in the middle, and the outer wall of the gear is specifically slidably connected to the middle of the toothed groove.

[0012] Preferably, the inner wall of the bottom of the protective shell is provided with a second sliding groove, and a slider is fixedly connected to the side wall of the end of the movable plate, with the outer wall of the slider slidably connected to the middle of the second sliding groove.

[0013] The advantages of this utility model are: through the cooperation between the rotating rod, threaded rod, arc plate, rectangular plate, connecting plate, plug pipe, protective plate and moving plate, the Roots vacuum pump, air inlet pipe and exhaust pipe can be quickly connected, and the operator does not need to enter the middle of the protective shell to operate, which improves convenience. In addition, the supporting components can further improve the stability when the protective plate and moving plate are opened.

[0014] This invention controls the movement of an arc-shaped plate by rotating a threaded rod. The arc-shaped plate then moves a rectangular plate and a connecting plate, causing multiple sets of connectors to detach from the middle of the inlet and outlet pipes. Subsequently, the protective plate and the moving plate are controlled by a support assembly to move the Roots vacuum pump out from the middle of the protective housing. This achieves the effect of quickly connecting the Roots vacuum pump, the inlet pipe, and the outlet pipe, and improves the operating space for disassembling the Roots vacuum pump. It solves the problem that workers need to repeatedly turn bolts and disassemble the Roots vacuum pump inside the protective housing, which is too cumbersome. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall device of this utility model;

[0017] Figure 2 This is a schematic diagram of the disassembled cross-sectional structure of the protective shell and protective plate of this utility model;

[0018] Figure 3 This is a schematic diagram showing the disassembled structure of the Roots-type vacuum pump and the threaded rod of this utility model;

[0019] Figure 4 This utility model Figure 2 An enlarged structural diagram of region A;

[0020] Figure 5 This utility model Figure 2 An enlarged structural diagram of region B;

[0021] Figure 6This utility model Figure 3 A magnified structural diagram of region C.

[0022] In the diagram: 1. Protective shell; 2. Protective plate; 21. Moving plate; 22. Slider; 3. Fixed block; 31. Telescopic rod; 32. Hinge block; 33. Connecting plate; 34. Round rod; 35. Gear; 36. Spring; 37. Toothed groove one; 38. Toothed groove two; 4. Rotating rod; 41. Threaded rod; 42. Arc plate; 43. Rectangular plate; 44. Connecting plate; 45. Moving block; 5. Inlet pipe; 6. Exhaust pipe; 7. Roots vacuum pump; 71. Inlet connecting pipe; 72. Slide groove one; 73. Exhaust connecting pipe; 8. Insert pipe; 81. Annular sealing ring; 9. Slide groove two; 10. Sealing groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] The following is in conjunction with the appendix Figure 1 -6 provides further details regarding this application.

[0025] This application discloses a Roots-type low-pressure oil-free medical molecular sieve oxygen generator with dedicated nitrogen removal function. (Refer to...) Figure 1 - Figure 5A Roots-type low-pressure oil-free medical molecular sieve oxygen generator with nitrogen removal function includes a protective shell 1. An inlet pipe 5 is fixedly connected to the middle of the protective shell 1. An exhaust pipe 6 is fixedly connected to one side of the inlet pipe 5 in the middle of the protective shell 1. A movable plate 21 is slidably connected to the bottom side of the middle of the protective shell 1. A Roots-type vacuum pump 7 is fixedly connected to the top of the movable plate 21 by bolts. A protective plate 2 is fixedly connected to the top side of the end of the movable plate 21. The outer wall of the protective plate 2 contacts the middle of the protective shell 1. A support assembly is provided at the end of the movable plate 21. A rotating rod 4 is rotatably connected to the middle of the protective plate 2. A threaded rod 41 is bolted to the end of the Roots vacuum pump 7. An arc-shaped plate 42 is threaded to the outer wall of the threaded rod 41. The arc-shaped plate 42 is slidably connected to the side wall of the Roots vacuum pump 7. A rectangular plate 43 is fixed to the side wall of the end of the arc-shaped plate 42. A connecting plate 44 is rotatably connected to the side wall of the end of the rectangular plate 43. An inlet connecting pipe 71 is fixed to the top of the Roots vacuum pump 7. An exhaust connecting pipe 73 is fixed to the side wall of the Roots vacuum pump 7. A connector 8 is slidably connected to the middle of the inlet connecting pipe 71. The other end of the connecting plate 44 is rotatably connected to the outer wall of the connector 8. The outer wall contacts the middle of the inlet pipe 5. During operation, it connects to the molecular sieve adsorption cylinder through the inlet pipe 5. When nitrogen venting is required, the Roots vacuum pump 7 is started to draw nitrogen out of the molecular sieve adsorption cylinder, which is then discharged through the exhaust pipe 6. When the Roots vacuum pump 7 needs maintenance after a period of use, the rotating rod 4 can be rotated to drive the threaded rod 41 to rotate. At this time, the arc-shaped plate 42, which is threaded to the outer wall of the threaded rod 41, will move on the side wall of the Roots vacuum pump 7. The arc-shaped plate 42 will drive the rectangular plate 43 to move. 3 will rotate with one end of the connecting plate 44, and the angle of the connecting plate 44 will change. The other end of the connecting plate 44 will rotate with the insertion pipe 8, and drive the insertion pipe 8 to move in the middle of the intake connection pipe 71, so that multiple sets of insertion pipes 8 are separated from the middle of the intake pipe 5 and the exhaust pipe 6 respectively. Then the protective plate 2 can be opened through the support assembly. The protective plate 2 will drive the intake connection pipe 71 to move out of the protective shell 1 through the moving plate 21. Compared with the traditional method of disassembling multiple sets of bolts, the work efficiency is improved to a certain extent.

[0026] Reference Figure 1 - Figure 2 and Figure 5The support assembly includes a fixed block 3, which is fixedly connected to the end of the movable plate 21. A telescopic rod 31 is rotatably connected to the inner wall of the bottom of the fixed block 3, and a hinge block 32 is rotatably connected to the other end of the telescopic rod 31. The hinge block 32 is fixedly connected to the side wall of the bottom of the protective shell 1. A toothed groove 37 is provided on the top side of the end of the telescopic rod 31, and a gear 35 is in contact with the middle of the toothed groove 37. The gear 35 is located in the middle of the fixed block 3, and a round rod 34 is fixedly connected to the top of the gear 35. A connecting plate 33 is fixedly connected to the top of the round rod 34, and the outer wall of the round rod 34 is slidably connected to the middle of the fixed block 3. A spring 36 is sleeved on the outer wall of the round rod 34. One end of the spring 36 is fixedly connected to the top of the gear 35, and the other end of the spring 36 is fixedly connected to the middle of the fixed block 3. During operation, the support assembly can move the connecting plate 33 and the round rod 34 by pulling them together. The round rod 34 drives the gear 35 to move, and the gear 35 squeezes the spring 36 until the gear 35 disengages from the middle of the toothed groove 37. Then the protective plate 2 can be moved by the connecting plate 33, and the fixed block 3 will also move accordingly. At this time, one end of the telescopic rod 31 will rotate in the middle of the fixed block 3, and the other end of the telescopic rod 31 will rotate with the hinge block 32. The telescopic rod 31 itself will also extend and retract until the protective plate 2 is fully opened. Then the connecting plate 33 is released, and the spring 36 will push the gear 35 into the middle of the toothed groove 37 through its own elasticity. In this way, the Roots vacuum pump 7 can be disassembled on the outside of the protective shell 1, which improves practicality. In addition, the multiple sets of telescopic rods 31 can support the bottom of the moving plate 21 to ensure its opening stability.

[0027] Reference Figure 3 Multiple sets of rectangular plates 43, connecting plates 44, and rotating rods 4 are provided. Multiple sets of rectangular plates 43 and connecting plates 44 are provided on the side wall of the other end of the arc plate 42. The outer walls of multiple sets of insertion pipes 8 slide on the middle of the exhaust connecting pipe 73. The outer walls of the other end of multiple sets of insertion pipes 8 contact the inner wall of the end of the exhaust pipe 6. During operation, the multiple sets of rectangular plates 43, connecting plates 44, and rotating rods 4 ensure that multiple sets of insertion pipes 8 can move synchronously, which improves practicality.

[0028] Reference Figure 6 The Roots vacuum pump 7 has a slide groove 72 on its side wall, and a moving block 45 is fixed to the side wall of the arc plate 42. The outer wall of the moving block 45 is slidably connected to the middle of the slide groove 72. When the arc plate 42 moves, it will drive the moving block 45 to slide in the middle of the slide groove 72, ensuring that the arc plate 42 can move in a straight line stably.

[0029] Reference Figure 4 and Figure 6Sealing grooves 10 are provided on the bottom side and the inner side of the bottom of the intake pipe 5. Annular sealing rings 81 are fixed to the top of the insertion pipe 8 and the outer wall of the top. The annular sealing rings 81 contact the middle of the sealing grooves 10. During operation, the multiple sets of annular sealing rings 81 and multiple sets of sealing grooves 10 ensure the sealing between the multiple sets of insertion pipes 8 and the intake pipe 5 and the exhaust pipe 6 respectively, thus improving practicality.

[0030] Reference Figure 5 The fixing block 3 has a toothed groove 38 in the middle. The outer wall of the gear 35 is slidably connected to the middle of the toothed groove 38. During operation, the toothed groove 38 in the middle of the fixing block 3 ensures the stability of the connection between the telescopic rod 31 and the fixing block 3 when the gear 35 is inserted into the toothed groove 37.

[0031] Reference Figure 2 The inner wall of the bottom of the protective shell 1 is provided with a second groove 9. The side wall of the end of the movable plate 21 is fixedly connected to a slider 22. The outer wall of the slider 22 is slidably connected to the middle of the second groove 9. When the movable plate 21 moves, it will drive the slider 22 to slide in the middle of the second groove 9, which will reduce the risk of the bottom movable plate 21 detaching from the middle of the protective shell 1 and improve its practicality.

[0032] Working principle: The inlet pipe 5 connects to the molecular sieve adsorption cylinder. When nitrogen venting is required, the Roots vacuum pump 7 is started to draw nitrogen out of the molecular sieve adsorption cylinder and then discharge it through the exhaust pipe 6. When the Roots vacuum pump 7 needs maintenance after a period of use, the rotating rod 4 can be rotated to drive the threaded rod 41 to rotate. At this time, the arc-shaped plate 42, which is threaded to the outer wall of the threaded rod 41, will move on the side wall of the Roots vacuum pump 7. The arc-shaped plate 42 will drive the rectangular plate 43 to move, and the rectangular plate 43 will connect with the connecting plate 4. When one end of 4 is rotated, the angle of the connecting plate 44 changes, and the other end of the connecting plate 44 rotates with the insertion pipe 8, causing the insertion pipe 8 to move in the middle of the intake connection pipe 71, so that multiple sets of insertion pipes 8 are separated from the middle of the intake pipe 5 and the exhaust pipe 6 respectively. Then the protective plate 2 can be opened through the support assembly. The protective plate 2 will move the intake connection pipe 71 out of the protective shell 1 through the moving plate 21. Compared with the traditional method of disassembling multiple sets of bolts, this improves the work efficiency to a certain extent.

[0033] When in use, the support assembly can be moved by pulling the connecting plate 33 and the round rod 34. The round rod 34 will drive the gear 35 to move, and the gear 35 will squeeze the spring 36 until the gear 35 disengages from the middle of the toothed groove 37. Then, the protective plate 2 can be moved by pulling the connecting plate 33. The fixing block 3 will also move accordingly. At this time, one end of the telescopic rod 31 will rotate in the middle of the fixing block 3, and the other end of the telescopic rod 31 will rotate with the hinge block 32. The telescopic rod 31 itself will also extend and retract until the protective plate 2 is fully opened. Then, the connecting plate 33 is released, and the spring 36 will push the gear 35 into the middle of the toothed groove 37 through its own elasticity. In this way, the Roots vacuum pump 7 can be disassembled on the outside of the protective shell 1, which improves practicality. In addition, the multiple sets of telescopic rods 31 can support the bottom of the moving plate 21 to ensure its opening stability.

[0034] 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 illustrative of the 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.

Claims

1. A Roots-type low-pressure oil-free medical molecular sieve oxygen generator with nitrogen removal function, comprising a protective shell (1), characterized in that: An air inlet pipe (5) is fixedly connected to the middle of the protective shell (1). An exhaust pipe (6) is fixedly connected to one side of the air inlet pipe (5) in the middle of the protective shell (1). A movable plate (21) is slidably connected to the bottom side of the middle of the protective shell (1). A Roots vacuum pump (7) is fixedly connected to the top of the movable plate (21) by bolts. A protective plate (2) is fixedly connected to the top side of the end of the movable plate (21). The outer wall of the protective plate (2) contacts the middle of the protective shell (1). A support assembly is provided at the end of the movable plate (21). A rotating rod (4) is rotatably connected to the middle of the protective plate (2). A threaded rod (41) is fixedly connected to the end of the rotating rod (4) by bolts. (41) An arc-shaped plate (42) is threaded on the outer wall. The arc-shaped plate (42) is slidably connected to the side wall of the Roots vacuum pump (7). A rectangular plate (43) is fixed to the side wall at the end of the arc-shaped plate (42). A connecting plate (44) is rotatably connected to the side wall at the end of the rectangular plate (43). An inlet connecting pipe (71) is fixed to the top of the Roots vacuum pump (7). An exhaust connecting pipe (73) is fixed to the side wall of the Roots vacuum pump (7). A plug pipe (8) is slidably connected to the middle of the inlet connecting pipe (71). The other end of the connecting plate (44) is rotatably connected to the outer wall of the plug pipe (8). The outer wall of the other end of the plug pipe (8) contacts the middle of the inlet pipe (5).

2. The Roots-type low-pressure oil-free medical molecular sieve oxygen generator nitrogen removal machine according to claim 1, characterized in that: The support assembly includes a fixing block (3), which is fixed to the end of the movable plate (21). A telescopic rod (31) is rotatably connected to the inner wall of the bottom of the fixing block (3). A hinge block (32) is rotatably connected to the other end of the telescopic rod (31). The hinge block (32) is fixed to the side wall of the bottom of the protective shell (1). A toothed groove (37) is provided on the top side of the end of the telescopic rod (31). A gear (3) contacts the middle of the toothed groove (37). 5) The gear (35) is located in the middle of the fixed block (3). A round rod (34) is fixedly connected to the top of the gear (35). A connecting plate (33) is fixedly connected to the top of the round rod (34). The outer wall of the round rod (34) is slidably connected to the middle of the fixed block (3). A spring (36) is sleeved on the outer wall of the round rod (34). One end of the spring (36) is fixedly connected to the top of the gear (35), and the other end of the spring (36) is fixedly connected to the middle of the fixed block (3).

3. The Roots-type low-pressure oil-free medical molecular sieve oxygen generator nitrogen removal machine according to claim 1, characterized in that: Multiple sets of rectangular plates (43), connecting plates (44), and rotating rods (4) are provided. Multiple sets of rectangular plates (43) and connecting plates (44) are provided on the side wall of the other end of the arc plate (42). The outer wall of multiple sets of insertion pipes (8) slides in the middle of the exhaust connecting pipe (73). The outer wall of the other end of multiple sets of insertion pipes (8) contacts the inner wall of the end of the exhaust pipe (6).

4. A Roots-type low-pressure oil-free medical molecular sieve oxygen generator with nitrogen removal function as described in claim 3, characterized in that: The Roots vacuum pump (7) has a sliding groove (72) on its side wall, and a movable block (45) is fixedly connected to the side wall of the arc plate (42). The outer wall of the movable block (45) is slidably connected to the middle of the sliding groove (72).

5. A Roots-type low-pressure oil-free medical molecular sieve oxygen generator with nitrogen removal function as described in claim 4, characterized in that: The bottom side and the inner side of the bottom of the air intake pipe (5) are provided with sealing grooves (10), and the top and the outer wall of the top of the insertion pipe (8) are fixed with annular sealing rings (81), and the annular sealing rings (81) are in contact with the middle of the sealing grooves (10).

6. A Roots-type low-pressure oil-free medical molecular sieve oxygen generator with nitrogen removal function according to claim 2, characterized in that: The fixing block (3) has a toothed groove (38) in the middle, and the outer wall of the gear (35) is specifically slidably connected to the middle of the toothed groove (38).

7. A Roots-type low-pressure oil-free medical molecular sieve oxygen generator with nitrogen removal function according to claim 1, characterized in that: The inner wall of the bottom of the protective shell (1) is provided with a second sliding groove (9), and a slider (22) is fixedly connected to the side wall of the end of the movable plate (21). The outer wall of the slider (22) is slidably connected to the middle of the second sliding groove (9).

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