Passive flow control valve for variable-frequency oxygen generation system

Abstract

The utility model relates to the technical field of valves, in particular to a passive flow control valve for a frequency conversion oxygen production system, which comprises a valve body, the top end of the valve body is rotatably connected with a tooth screw seat, the inside of the tooth screw seat is in threaded connection with a screw rod, and the end part of the screw rod is fixedly connected with a limiting sliding column; a plug rod; a stopper; and a variable-frequency reaction control device. The variable-frequency reaction control device rotates the tooth screw seat in direct proportion according to the oxygen generation frequency, the tooth screw seat adjusts the positions of the limiting sliding column, the plug rod and the blocking plug on the screw rod, the higher the oxygen generation frequency is, the higher the blocking plug is, the gas circulation area of the valve body is increased by increasing the height of the blocking plug, then the pressure of gas in single-frequency contact with the bottom of the blocking plug is weakened, and the oxygen generation efficiency is improved. The vibration amplitude of the stop plug under stress is reduced, the vibration range of the stop plug is reduced, the stress of deformation and compression of the spring is reduced, the damage of the baffle and the spring caused by high-frequency vibration is reduced, the service life is prolonged, and the stability of the valve body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a passive flow control valve used in a variable frequency oxygen production system. Background Art

[0002] An oxygen generator is a complete set of equipment that produces a mixture of nitrogen and argon, neon, helium, krypton, xenon and other gases. In general, air separation equipment is mostly used to produce oxygen. A pressure swing adsorption oxygen generator is mainly composed of a blower, a vacuum pump, a switching valve, an adsorber and an oxygen balance tank. Under the condition of penetrating atmospheric pressure, the VPSA special molecular sieve is used to selectively adsorb impurities such as nitrogen, carbon dioxide and water in the air, and the molecular sieve is desorbed under vacuum conditions, thereby cyclically producing oxygen with higher purity.

[0003] The passive valve is mainly composed of a spring and a baffle. The opening and closing of the passive valve is automatically affected by the pressure of the internal circulating medium. In the variable frequency oxygen production system, the baffle positioned by elastic force changes the vibration amplitude and frequency under the influence of variable frequency. When the frequency changes continuously, the baffle is impacted by gases of different frequencies. After the impact, the elastic reset of the baffle causes the baffle to slide continuously in the valve. During the long-term variable frequency oxygen production, the high-frequency vibration of the baffle and the spring will damage the service life of the baffle and the spring. In view of this, we propose a passive flow control valve for variable frequency oxygen production system. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a passive flow control valve for a variable frequency oxygen production system, which solves the problems raised in the above background technology. To achieve the above purpose, the utility model is implemented through the following technical solutions: a passive flow control valve for a variable frequency oxygen production system, comprising a valve body, the top end of the valve body is rotatably connected to a tooth screw seat, the internal thread of the tooth screw seat is connected to a screw, the end of the screw is fixedly connected to a limit slide column, the end of the limit slide column is elastically connected to a plug rod through a spring, the end of the plug rod is fixedly connected to a stopper, and the air inlet end of the valve body is provided with a variable frequency reaction control device, the variable frequency reaction control device controls the rotation angle of the tooth screw seat according to the gas circulation frequency at the air inlet end of the valve body, and is used to adjust the position of the stopper in the valve body.

[0005] Preferably, the surface of the limit sliding column is slidably connected to the inside of the valve body, the surface of the plug rod is slidably connected to the inner wall of the valve body, and a vibration-damping chamber is opened inside the valve body.

[0006] Preferably, the variable frequency reaction control device includes a connecting base, the end of the connecting base is fixedly connected to the end of the valve body by bolts, the interior of the connecting base is rotatably connected to a shaft rod, the surface of the shaft rod is fixedly connected to a fan plate, the end of the shaft rod is provided with a centrifugal force drive device, and the centrifugal force drive device is provided with an intermittent drive rack.

[0007] Preferably, the fan plate is located inside the connecting base, and the surface of the intermittent drive rack engages with the surface of the gear screw seat.

[0008] Preferably, the centrifugal force driving device includes a pneumatic chamber, the end of which is fixed to the end of the shaft, the interior of the pneumatic chamber is slidably connected to a pneumatic plate, the end of the pneumatic plate is fixedly connected to a limiting rod, the end of the limiting rod is fixedly connected to a gravity ball, the end of the pneumatic chamber away from the shaft is fixedly connected to a connecting pipe, the end of the connecting pipe is fixedly connected to a through shaft, and the end of the through shaft is rotatably connected to a fixed flow seat.

[0009] Preferably, the surface of the limit rod is slidably connected to the inside of the shaft, a spring is fixedly connected between the surface of the gravity ball and the surface of the shaft, and one end of the through shaft away from the fixed flow seat is fixedly connected to the end of the shaft.

[0010] Preferably, the interior of the fixed flow seat is slidably connected to the surface of the intermittent drive rack, the surface of the fixed flow seat is fixedly connected to the valve body, the surface of the fixed flow seat is fixedly connected to a protective shell, and the surface of the protective shell is fixedly connected to the connecting base.

[0011] It can be seen from the above technical solutions that the passive flow control valve for the variable frequency oxygen production system provided in the embodiments of this specification has at least the following beneficial effects:

[0012] (1) The utility model rotates the tooth screw seat in proportion to the frequency of oxygen production through the frequency conversion reaction control device. The tooth screw seat adjusts the position of the upper limit sliding column, the plug rod and the stopper of the screw rod. The higher the oxygen production frequency, the higher the height of the stopper. By increasing the height of the stopper, the gas circulation area of ​​the valve body is increased, and then the pressure of the gas single-frequency contacting the bottom of the stopper is weakened, so that the amplitude of the vibration of the stopper is reduced, the range of the vibration of the stopper is reduced, and the force of the spring deformation and compression is reduced. At the same vibration frequency, the smaller the vibration amplitude, the smaller the damage, thereby achieving the effect of reducing the damage of the baffle and the spring caused by high-frequency vibration, increasing the service life of the baffle and the spring, and at the same time improving the overall stability of the valve body.

[0013] (2) The utility model controls the number of revolutions of the fan plate according to the oxygen production frequency through a variable frequency reaction control device. The higher the frequency of the shaft rotation, the more the shaft drives the intermittent drive rack to move through the centrifugal force driving device, so that the intermittent drive rack drives the gear screw seat to rotate during the movement. The frequency of the oxygen production itself is used to control the rotation angle of the gear screw seat, thereby achieving the effect of automatically adjusting the height of the stopper, and then achieving the effect of automatically adjusting the vibration amplitude of the stopper, thereby reducing the damage to the baffle and the spring caused by high-frequency vibration, increasing the service life of the baffle and the spring, and at the same time improving the overall stability of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the frequency conversion reaction control device in the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the centrifugal force driving device in the utility model;

[0018] Figure 4 It is a structural schematic diagram of the middle tooth screw seat of the utility model.

[0019] In the figure: 1. valve body; 2. tooth screw seat; 3. screw rod; 4. limit sliding column; 5. plug rod; 6. stopper; 7. frequency conversion reaction control device; 71. connecting base; 72. shaft rod; 73. fan plate; 74. centrifugal force drive device; 741. air pressure chamber; 742. air pressure plate; 743. limit rod; 744. gravity ball; 745. connecting pipe; 746. through shaft; 747. fixed flow seat; 748. protective shell; 75. intermittent drive rack; 10. vibration reduction chamber. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-Figure 4 As shown, the technical solution provided by the utility model is:

[0022] Example 1

[0023] A passive flow control valve for variable frequency oxygen production system, such as Figure 1-Figure 4 As shown, it includes a valve body 1, the top end of the valve body 1 is rotatably connected to a tooth screw seat 2, the internal thread of the tooth screw seat 2 is connected to a screw rod 3, the end of the screw 3 is fixedly connected to a limiting sliding column 4, the end of the limiting sliding column 4 is elastically connected to a plug rod 5 through a spring, the end of the plug rod 5 is fixedly connected to a stopper 6, the threaded connection between the screw seat and the screw 3 is self-locking, thereby improving the stability of the height limitation of the stopper 6, the stopper 6 in the valve body 1 is affected by the oxygen production frequency, and the frequency of its vibration is proportional to the oxygen production frequency. High-frequency oxygen production work will cause high-frequency vibration of the stopper 6. During high-frequency oxygen production, the tooth screw seat 2 is rotated in proportion to the frequency of oxygen production, and the tooth screw seat 2 adjusts the positions of the limiting sliding column 4, the plug rod 5 and the stopper 6 of the screw 3. The higher the oxygen production frequency, the higher the stopper The higher the height of 6 is, the higher the height of the stopper 6 is, the larger the area of ​​gas circulation in the valve body 1 is, thereby weakening the pressure of the gas contacting the bottom of the stopper 6 at a single frequency, so that the amplitude of the vibration of the stopper 6 is reduced, the vibration range of the stopper 6 is reduced, and the force of the spring deformation and compression is reduced. At the same vibration frequency, the smaller the amplitude of the vibration is, the smaller the damage is, thereby achieving the effect of reducing the damage to the baffle and the spring caused by high-frequency vibration, increasing the service life of the baffle and the spring, and at the same time improving the overall stability of the valve body 1. A variable frequency reaction control device 7 is provided at the air inlet end of the valve body 1. The variable frequency reaction control device 7 controls the rotation angle of the tooth screw seat 2 according to the gas circulation frequency at the air inlet end of the valve body 1, so as to adjust the position of the stopper 6 in the valve body 1.

[0024] In this embodiment, the surface of the limit slide 4 is slidably connected to the interior of the valve body 1, and the limit slide 4 is limited so that it can only slide in a straight line. The surface of the plug rod 5 is slidably connected to the inner wall of the valve body 1. A vibration damping chamber 10 is opened inside the valve body 1, and the vibration damping chamber 10 is filled with rubber particles for buffering and protecting the valve body 1, thereby improving the overall stability of the valve body 1 and reducing the problem of damage to internal components due to vibration.

[0025] Furthermore, the variable frequency reaction control device 7 includes a connecting base 71, the end of the connecting base 71 is fixedly connected to the end of the valve body 1 by bolts, the inside of the connecting base 71 is rotatably connected to a shaft 72, the surface of the shaft 72 is fixedly connected to a fan plate 73, the connecting base 71 is installed at the air inlet end of the valve body 1, and the air pressure before the gas enters the valve body 1 drives the fan plate 73 to rotate, and then drives the shaft 72 on the fan plate 73 to rotate by air pressure, and the end of the shaft 72 is provided with a centrifugal force driving device 74, and the centrifugal force driving device 74 is provided with an intermittent driving rack 75. The higher the oxygen production frequency, the higher the oxygen production frequency. At the same time, the more circles the fan plate 73 rotates under force, the higher the frequency of the shaft 72 rotation. The shaft 72 drives the intermittent drive rack 75 to move through the centrifugal force driving device 74, so that the intermittent drive rack 75 drives the tooth screw seat 2 to rotate during the movement. The frequency of the oxygen production itself is used to control the rotation angle of the tooth screw seat 2, so as to achieve the effect of automatically adjusting the height of the stopper 6, and then achieve the effect of automatically adjusting the vibration amplitude of the stopper 6, reduce the damage of the baffle and the spring caused by high-frequency vibration, improve the service life of the baffle and the spring, and improve the overall stability of the valve body 1. The fan plate 73 is located inside the connecting base 71, and the surface of the intermittent drive rack 75 meshes with the surface of the tooth screw seat 2.

[0026] Example 2

[0027] like Figure 3 As shown, on the basis of Example 1, the centrifugal force driving device 74 includes a gas pressure chamber 741, the end of the gas pressure chamber 741 is fixed to the end of the shaft 72, the gas pressure plate 742 is slidably connected inside the gas pressure chamber 741, the end of the gas pressure plate 742 is fixedly connected to the limit rod 743, the end of the limit rod 743 is fixedly connected to the gravity ball 744, the end of the gas pressure chamber 741 away from the shaft 72 is fixedly connected to the connecting pipe 745, the end of the connecting pipe 745 is fixedly connected to the through shaft 746, and the end of the through shaft 746 is rotatably connected There is a fixed flow seat 747, which uses centrifugal force to control the length of the gravity ball 744 on the shaft 72 from the axis point of the shaft 72 when it rotates according to the number of turns of the fan plate 73. The change in the distance between the gravity ball 744 and the shaft 72 drives the limit rod 743 to drive the air pressure plate 742 to perform piston sliding in the air pressure chamber 741, and the air pressure is used to intermittently drive the rack 75 to achieve the effect of rack position adjustment. The intermittent drive rack 75 engages the tooth screw seat 2 to rotate accordingly, thereby achieving the effect of automatically adjusting the height of the stopper 6.

[0028] It is worth noting that the surface of the limit rod 743 is slidably connected to the inside of the shaft 72, which is used to limit the movement trajectory of the gravity ball 744 so that it can only move along the axis where the limit rod 743 is located. A spring is fixedly connected between the surface of the gravity ball 744 and the surface of the shaft 72. The gravity ball 744 is elastically positioned by the spring, so that when the shaft 72 rotates, it can achieve the purpose of elastic stretching at the frequency of rotation of the shaft 72, thereby achieving the effect of adjusting the distance between the gravity ball 744 and the shaft 72. The end of the through shaft 746 away from the fixed flow seat 747 is fixedly connected to the end of the shaft 72.

[0029] It is worth mentioning that the interior of the fixed flow seat 747 is slidably connected to the surface of the intermittent drive rack 75, and the end of the intermittent drive rack 75 performs piston sliding in the fixed flow seat 747, and its sliding distance and direction are affected by the internal air pressure of the fixed flow seat 747. The surface of the fixed flow seat 747 is fixedly connected to the valve body 1, and the surface of the fixed flow seat 747 is fixedly connected with a protective shell 748, and the surface of the protective shell 748 is fixedly connected to the connecting base 71. The protective shell 748 is used to seal and protect the centrifugal drive device 74 as a whole.

[0030] When the passive flow control valve of the utility model for variable frequency oxygen production system is in use, oxygen enters through the air inlet end of the connecting base 71, and after entering, the fan plate 73 is driven by the air pressure to rotate and give way, and flows from the air outlet end of the connecting base 71 to the inside of the valve body 1. The stopper 6 in the valve body 1 is affected by the oxygen production frequency, and the frequency of its vibration is proportional to the oxygen production frequency. High-frequency oxygen production work will cause the stopper 6 to vibrate at a high frequency; the higher the oxygen production frequency, the more circles the fan plate 73 is forced to rotate in the same time. When the fan plate 73 rotates, the shaft 72 drives the gravity ball 744 on the limit rod 743 to rotate, and the gravity ball 744 moves along the axis of the shaft 72. When rotating, the higher the frequency of rotation, the longer the radius of the gravity ball 744 from the axis point of the shaft 72 according to the principle of centrifugal force, that is, the higher the oxygen production frequency, the higher the rotation frequency of the fan plate 73, and the farther the gravity ball 744 is from the axis of the shaft 72; the distance between the gravity ball 744 and the shaft 72 is controlled according to the frequency of oxygen production, and during the period of distance change, the upper limit rod 743 of the gravity ball 744 slides in the shaft 72 and the air pressure chamber 741 respectively, and the limit rod 743 drives the air pressure plate 742 to perform piston sliding in the air pressure chamber 741, and during the sliding period, the gas inside the air pressure chamber 741 is squeezed or sucked, and the gas pressure acts on the connecting pipe 745 connected to the through shaft 746 In the connected fixed flow seat 747, the air pressure drives the intermittent drive rack 75 to slide on the inner wall of the fixed flow seat 747. During the sliding period, the teeth on the surface of the intermittent drive rack 75 intermittently mesh with the surface of the tooth screw seat 2, and the meshing drive tooth screw seat 2 is rotated to achieve the effect of adjusting the height of the upper limit slide 4 of the screw rod 3 in the valve body 1. The limit slide 4 drives the stopper 6 on the plug rod 5 through the spring to adjust the position in the valve body 1; the higher the oxygen production frequency, the higher the rotation frequency of the fan plate 73, the farther the gravity ball 744 is from the axis of the shaft rod 72, and the air pressure plate 742 generates negative pressure in the air pressure chamber 741, and the negative pressure is connected to the fixed flow seat 747 through the connecting pipe 745 and the through shaft 746. The seat 747 acts on the intermittent drive rack 75. When the intermittent drive rack 75 moves in one direction, the meshing tooth screw seat 2 drives the adjusting screw 3 to move upward. The adjusting screw 3 drives the plug 6 on the plug rod 5 upward through the limiting slide column 4 and the spring. At this time, when high-frequency oxygen is input, after it acts on the plug 6, the amplitude of the vibration of the plug 6 is reduced, the vibration range of the plug 6 is reduced, and the force of the spring deformation and compression is reduced. At the same vibration frequency, the smaller the vibration amplitude, the smaller the damage, thereby achieving the effect of reducing the damage to the baffle and the spring caused by high-frequency vibration, increasing the service life of the baffle and the spring, and at the same time improving the overall stability of the valve body 1.

[0031] The above implementation methods are only used to illustrate the embodiments of the present utility model, and are not limitations of the embodiments of the present utility model. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the embodiments of the present utility model. Therefore, all equivalent technical solutions also belong to the scope of the embodiments of the present utility model. The patent protection scope of the embodiments of the present utility model should be limited by the claims.

Claims

1. A passive flow control valve for a variable frequency oxygen production system, comprising a valve body (1), characterized in that: The top end of the valve body (1) is rotatably connected to a tooth screw seat (2), the internal thread of the tooth screw seat (2) is connected to a screw rod (3), the end of the screw rod (3) is fixedly connected to a limit slide column (4), the end of the limit slide column (4) is elastically connected to a plug rod (5) via a spring, the end of the plug rod (5) is fixedly connected to a stopper (6), and a variable frequency reaction control device (7) is provided at the air inlet end of the valve body (1), the variable frequency reaction control device (7) controls the rotation angle of the tooth screw seat (2) according to the gas circulation frequency at the air inlet end of the valve body (1), and is used to adjust the position of the stopper (6) in the valve body (1).

2. A passive flow control valve for a variable frequency oxygen production system according to claim 1, characterized in that: The surface of the limit slide column (4) is slidably connected to the interior of the valve body (1), the surface of the plug rod (5) is slidably connected to the inner wall of the valve body (1), and a vibration reduction chamber (10) is provided inside the valve body (1).

3. A passive flow control valve for a variable frequency oxygen production system according to claim 1, characterized in that: The variable frequency reaction control device (7) comprises a connecting base (71), the end of the connecting base (71) is fixedly connected to the end of the valve body (1) by means of bolts, the interior of the connecting base (71) is rotatably connected to a shaft (72), the surface of the shaft (72) is fixedly connected to a fan plate (73), the end of the shaft (72) is provided with a centrifugal force driving device (74), and the centrifugal force driving device (74) is provided with an intermittent driving rack (75).

4. A passive flow control valve for a variable frequency oxygen production system according to claim 3, characterized in that: The fan plate (73) is located inside the connecting base (71), and the surface of the intermittent drive rack (75) engages with the surface of the gear screw seat (2).

5. The passive flow control valve for a variable frequency oxygen production system according to claim 3, characterized in that: The centrifugal force driving device (74) comprises an air pressure chamber (741), the end of the air pressure chamber (741) is fixed to the end of the shaft (72), the air pressure plate (742) is slidably connected inside the air pressure chamber (741), the end of the air pressure plate (742) is fixedly connected to a limit rod (743), the end of the limit rod (743) is fixedly connected to a gravity ball (744), the end of the air pressure chamber (741) away from the shaft (72) is fixedly connected to a connecting pipe (745), the end of the connecting pipe (745) is fixedly connected to a through shaft (746), and the end of the through shaft (746) is rotatably connected to a fixed flow seat (747).

6. A passive flow control valve for a variable frequency oxygen production system according to claim 5, characterized in that: The surface of the limit rod (743) is slidably connected to the interior of the shaft rod (72), a spring is fixedly connected between the surface of the gravity ball (744) and the surface of the shaft rod (72), and one end of the through shaft (746) away from the fixed flow seat (747) is fixedly connected to the end of the shaft rod (72).

7. The passive flow control valve for a variable frequency oxygen production system according to claim 5, characterized in that: The interior of the fixed flow seat (747) is slidably connected to the surface of the intermittent drive rack (75), the surface of the fixed flow seat (747) is fixedly connected to the valve body (1), the surface of the fixed flow seat (747) is fixedly connected to a protective shell (748), and the surface of the protective shell (748) is fixedly connected to the connecting base (71).

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