Oxygen generator flowmeter detection device based on an imaging system

Abstract

The present invention belongs to the technical field of oxygen generator flow rate detection, and particularly relates to a detection device for an oxygen generator flow meter based on an imaging system, which includes a platform. One side of the platform is fixed with a support plate, and the other side is fixed with a display board. A visual imager is fixed inside the support plate. Above the platform is arranged a flow meter, and above the flow meter is provided a fixed cylinder, and the fixed cylinder is fixedly connected with the inside of the display board; A pressure regulating valve is fixed above the platform. The pressure regulating valve is provided with an air inlet and an air outlet. The flow meter is provided with an input end and an output end. The pressure regulating valve includes a hollow cavity, a hollow pipe, an air passage and a valve block. The air inlet is connected to an external gas source pipeline, the air outlet is connected to the input end pipeline, and the output end is connected to an external pipeline. This device solves the problem that when detecting the flow rate of an oxygen generator currently, the detection result is inaccurate due to the sealing problem during pressure regulation.

Description

Technical Field

[0001] The present invention belongs to the technical field of oxygen generator flow detection, and specifically relates to a detection device for an oxygen generator flowmeter based on an imaging system. Background Art

[0002] Oxygen generator flowmeters are mainly divided into two types: float flowmeters and turbine flowmeters. The float flowmeter calculates the flow rate by measuring the volume of fluid passing through the pipeline and is suitable for small flow rate measurements; while the turbine flowmeter calculates the flow rate by measuring the rotational speed of the turbine driven by the fluid and is suitable for large flow rate measurements.

[0003] Among them, the detection principle for the float flowmeter is based on buoyancy balance and variable area measurement. The float flowmeter mainly consists of a vertically tapered tube that expands from bottom to top and a float that moves up and down along the axis of the tapered tube. When the gas flows upward through the annular gap formed by the tapered tube and the float, a pressure difference is generated between the upper and lower ends of the float, forming a force for the float to rise. When the upward force received by the float is greater than its weight in the gas, the float rises, the annular gap area increases, the flow velocity decreases, and the pressure difference decreases until the upward force is equal to the weight of the float, and the float stabilizes at a certain height. Generally, the pressure and the position of the float are compared through visual imaging. The detection principle of the visual imaging flowmeter is mainly based on image processing technology. The position of the float is captured by a camera, and then the corresponding scale of the float is compared with the pressure input into the float flowmeter.

[0004] The way to control the pressure is to adjust the pressure valve to control the gas flow velocity. The pressure valve usually has a sealing material inside to avoid gas leakage, otherwise it will lead to inaccurate detection data. Currently, the sealing material inside the pressure valve cannot be fully utilized. When the sealing performance of the sealing material decreases, it is replaced immediately, which results in a large amount of waste of the sealing material and cannot be fully utilized. This phenomenon has become an urgent problem for those in this field. Summary of the Invention

[0005] The purpose of the present invention is to provide a detection device for an oxygen generator flowmeter based on an imaging system to solve the problems raised in the above background art.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: A detection device for an oxygen generator flowmeter based on an imaging system, including a platform. One side of the platform is fixed with a support plate, and the other side is fixed with a display board. The inner side of the support plate is fixed with a visual imager. Above the platform is placed a flowmeter, and above the flowmeter is provided a fixed cylinder, and the fixed cylinder is fixedly connected to the inner side of the display board; Above the platform is fixed a pressure regulating valve. The pressure regulating valve is provided with an air inlet and an air outlet. The flowmeter is provided with an input end and an output end. The pressure regulating valve includes a hollow cavity, a hollow tube, an air passage and a valve block. The air inlet is connected to an external gas source pipeline, the air outlet is connected to the input end pipeline, the output end is connected to an external pipeline, the air inlet is connected to the hollow tube, the hollow tube, the air passage and the hollow cavity communicate with each other, the air outlet is connected to the left side of the hollow cavity, the valve block is arranged in the hollow cavity and fits with the air passage. The visual imager is connected to a computer display screen, and a visual imaging system is arranged in the computer display screen. The visual imaging system is used to photograph the flowmeter through the visual imager and transmit the image of the rotameter into the computer display screen, and by comparing the set scale value with the scale value presented by the image, the detection parameters of the rotameter are tested.

[0007] The present invention further explains that the valve block includes a disc, a sealing block, an output shaft and a turntable. Scales are provided on the surfaces of the pressure regulating valve and the turntable and are aligned with each other; One side of the pressure regulating valve is provided with a through hole, and the output shaft passes through the through hole. The turntable is fixed to one end of the output shaft, the disc is fixed to the other end of the output shaft. The sealing block is fixedly installed on one side of the disc by screws, and the outer surface fits with the bottom of the air passage. A slot is provided in the middle of the disc. On the outer side of one end of the output shaft is provided an insertion block, and the insertion block is inserted into the slot. The sealing block is made of plastic material.

[0008] The present invention further explains that an arc-shaped block is fixed to the inner wall of the hollow cavity. An inner pressing block is arranged inside the arc-shaped block, and two elastic springs are fixed between the pressing block and the arc-shaped block. One side of the disc is fixed with a pushing block. The edges of the pushing block and the pressing block are both arc-shaped; After the disc rotates clockwise, the pressing block and the pushing block come into contact with each other.

[0009] The present invention further explains that the inner side of the pressing block is arc-shaped, and from right to left, the radian gradually increases.

[0010] The present invention further explains that in the initial state of the pressure regulating valve, the output shaft is not fully inserted into the slot. A sliding hole is arranged inside the disc. A push rod is slidably connected inside the sliding hole. The inner end of the push rod is located in the slot, and the outer end contacts the left side of the sealing block; The front end part of the output shaft is arc-shaped.

[0011] The present invention is further described as follows. A mating block is fixed to the front end of the arc-shaped block. A hole is provided on the left side of the mating block, and a spring and a sliding rod are arranged in the hole. The inner diameter of the middle part of the hole is larger than that of the two ends, and the spring is arranged in the middle part. The spring and the sliding rod are fixed to each other. One end of the sliding rod is spherical, and the other end is fixed with a support block. The inner end of the support block is arc-shaped, and after the sliding rod moves, the support block contacts the outer side of the pressing block; A top plate is fixed to the front end of the push block. The surface of the top plate is arc-shaped, and after the disc rotates to the limit position, the top plate contacts the spherical part of the sliding rod.

[0012] The present invention is further described as follows. The two elastic springs are arranged oppositely.

[0013] The present invention is further described as follows. There are two sliding holes, and they are arranged adjacent to each other.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: By rotating the valve block, the present invention controls the size of the airway blocked by it, thereby controlling the flow rate of the gas discharged from the airway into the hollow cavity, and thus controlling the pressure. The adjustment is convenient and efficient, and the adjustment accuracy is high. It can relatively further improve the detection accuracy of the flowmeter and increase the fitting strength between the sealing block and the inner wall of the hollow cavity to improve the sealing performance and prevent gas leakage from the fitting part, which may cause changes in the air pressure accuracy and affect the detection accuracy.

[0015] After the pressure regulating valve is used for a long time, the outer end of the ejector rod squeezes the left side of the sealing block, and the sealing block exerts a thrust to the right side, so that the left side part of the sealing block squeezes the connection part between the airway and the hollow cavity, fully avoiding gas leakage from the connection part, improving the sealing strength, maximizing the utilization of the sealing block, and greatly reducing the replacement cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0017] Figure 1 is the overall structural schematic diagram of the present invention;

[0018] Figure 2 is the schematic diagram of the pressure regulating valve of the present invention;

[0019] Figure 3 is the plan view of the pressure regulating valve of the present invention;

[0020] Figure 4 is the left sectional view of the pressure regulating valve of the present invention;

[0021] Figure 5 is the rear sectional view of the pressure regulating valve of the present invention;

[0022] Figure 6 It is a schematic diagram of the internal structure of the disc of the present invention;

[0023] Figure 7 It is an exploded view of the disc of the present invention;

[0024] Figure 8 It is a schematic diagram of the structure at the rear side of the arc-shaped block of the present invention;

[0025] Figure 9 It is a schematic diagram of the structure at the front side of the arc-shaped block of the present invention;

[0026] Figure 10 It is a diagram of the changes after the disc of the present invention rotates;

[0027] Figure 11 It is a plan view of the matching block of the present invention;

[0028] In the figure: 1, platform; 2, display board; 3, visual imager; 4, fixed cylinder; 5, pressure regulating valve; 51, hollow cavity; 511, arc-shaped block; 512, pressing block; 513, elastic spring; 514, matching block; 515, sliding rod; 516, support block; 52, hollow pipe; 53, air duct; 54, disc; 541, pushing block; 542, sliding hole; 543, ejector rod; 544, top disc; 55, sealing block; 56, output shaft; 57, turntable. Specific Embodiments

[0029] The following further non-limiting detailed description of the technical solution of the present invention is given in conjunction with the preferred embodiments and their accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figures 1 - 11 , the present invention provides a technical solution: an oxygen generator flowmeter detection device based on an imaging system, including a platform 1, a support plate is fixed on one side of the platform 1, a display board 2 is fixed on the other side, a visual imager 3 is fixed inside the support plate, a flowmeter is arranged above the platform 1, and a fixed cylinder 4 is arranged above the flowmeter, and the fixed cylinder 4 is fixedly connected to the inside of the display board 2;

[0031] Above platform 1, a pressure regulating valve 5 is fixed. The pressure regulating valve 5 is provided with an air inlet and an air outlet. The flowmeter is provided with an input end and an output end. The pressure regulating valve 5 includes a hollow cavity 51, a hollow tube 52, an air passage 53 and a valve block. The air inlet is connected to an external air source pipeline, the air outlet is connected to the input end pipeline, the output end is connected to an external pipeline, the air inlet is connected to the hollow tube 52, the hollow tube 52, the air passage 53 and the hollow cavity 51 communicate with each other, the air outlet is connected to the left side of the hollow cavity 51, the valve block is arranged in the hollow cavity 51 and fits with the air passage 53. The visual imager 3 is connected to a computer display screen, and a visual imaging system is arranged in the computer display screen. The visual imaging system is used to photograph the flowmeter through the visual imager 3 and transmit the image of the rotameter into the computer display screen. By comparing the set scale value with the scale value presented in the image, the detection parameters of the rotameter are tested;

[0032] Place the flowmeter below the fixed cylinder 4, then start the fixed cylinder 4. The fixed cylinder 4 presses on the flowmeter to stabilize the flowmeter, and then start to detect the flowmeter. The external air source enters the pressure regulating valve 5 through the air inlet. The gas enters the air passage 53 through the hollow tube 52, then enters the hollow cavity 51 through the air passage 53, then enters the input end through the air outlet, and then enters the flowmeter. The float in the flowmeter is pushed by the air pressure and slides upward inside the flowmeter. Then the gas at the bottom of the float enters above the float through both sides of the float and is discharged through the output end. After the float stabilizes, photograph the flowmeter through the visual imager 3 and transmit it to the computer display screen. Image formation is carried out through the visual imaging system. According to the pressure value adjusted by the pressure regulating valve 5 and the position scale of the float in the flowmeter, relative conversion and comparison are carried out to detect whether there are defects in the flowmeter. The detection process is automated, the operation is convenient and efficient, and compared with traditional manual identification, the accuracy of identifying the scale position of the float through imaging is higher, and the detection accuracy and quality are high;

[0033] When the pressure regulating valve 5 adjusts the pressure, by rotating the valve block, the size of its blockage of the air passage 53 is controlled, so as to control the flow rate of the gas discharged from the air passage 53 into the hollow cavity 51, thereby controlling the pressure. The adjustment is convenient and efficient, and the adjustment accuracy is high, which can relatively further improve the detection accuracy of the flowmeter.

[0034] The valve block includes a disc 54, a sealing block 55, an output shaft 56 and a turntable 57. The surfaces of the pressure regulating valve 5 and the turntable 57 are both provided with scales and are aligned with each other;

[0035] A through hole is provided on one side of the pressure regulating valve 5, and the output shaft 56 is inserted into the through hole. The rotary disk 57 is fixed to one end of the output shaft 56, and the disc 54 is fixed to the other end of the output shaft 56. The sealing block 55 is fixed to one side of the disc 54 by screws, and its outer surface is in contact with the bottom of the airway 53. A slot is provided in the middle of the disc 54, and an insert is provided on the outside of one end of the output shaft 56, and is inserted into the slot through the insert. The sealing block 55 is made of plastic.

[0036] When adjusting the pressure of the pressure regulating valve 5, the operator rotates the turntable 57, which drives the disc 54 to rotate via the output shaft 56, thereby driving the sealing block 55 to rotate around the center, controlling the size of the sealing block 55 blocking the airway 53, thereby controlling the gas discharge rate and the air pressure. The adjusted air pressure is determined by the corresponding scale of the rotating turntable 57. The adjustment is highly accurate, convenient and fast, and facilitates improving the accuracy of subsequent flow meter detection. The plastic sealing block 55 has the ability to deform, so when it is in contact with the inner wall of the hollow cavity 51, it ensures the sealing effect and reduces gas leakage, thereby accurately controlling the flow rate of gas discharged from the airway 53.

[0037] At the same time, after the pressure regulating valve 5 has been used for a period of time, the operator can pull out the output shaft 56 through the turntable 57 to disengage it from the slot. At this time, the operator can blow air into the pressure regulating valve 5 through the air outlet and the through hole to clean it, so as to avoid the presence of impurities inside that affect the flow of gas after a long period of testing, and to avoid blockage, thereby avoiding affecting the detection accuracy of the flow meter.

[0038] An arc-shaped block 511 is fixed to the inner wall of the hollow cavity 51. A pressure block 512 is provided on the inner side of the arc-shaped block 511. Two elastic springs 513 are fixed between the pressure block 512 and the arc-shaped block 511. A push block 541 is fixed to one side of the disk 54. The edges of the push block 541 and the edges of the pressure block 512 are both arc-shaped.

[0039] After the disc 54 rotates clockwise, the pressing block 512 and the pushing block 541 come into contact with each other;

[0040] Rotate the turntable 57 clockwise, the disc 54 rotates clockwise, the push block 541 and the sealing block 55 rotate synchronously, the right side of the sealing block 55 adheres to the right inner wall of the hollow cavity 51 and squeezes each other, and at the same time the push block 541 and the pressure block 512 squeeze each other, the pressure block 512 presses the elastic spring 513 through the arc block 511 to cause deformation and generate a reaction force, so that the push block 541 applies a force to the upper right corner, thereby increasing the fitting strength between the sealing block 55 and the inner wall of the hollow cavity 51, so as to improve the sealing and prevent gas leakage from the fitting point, resulting in changes in air pressure accuracy and affecting the detection accuracy.

[0041] The inner side of the pressing block 512 is arc-shaped, and the curvature gradually increases from right to left;

[0042] Example 1: When the air pressure is reduced, the pushing block 541 rotates by a small angle and has less contact surface with the pressing block 512. At this time, the inner side of the pressing block 512 with a small arc provides a large acting force on the pushing block 541, thereby further preventing gas from leaking from the right side of the sealing block 55, and the sealing effect is good.

[0043] Example 2: After the pressure is increased, the pushing block 541 rotates by a large angle and has more contact surface with the pressing block 512. At this time, the pushing block 541 rotates to the large-arc part of the pressing block 512, and the extrusion force of the pressing block 512 on the pushing block 541 decreases, so that the acting force of the sealing block 55 on the inner wall of the hollow cavity 51 decreases. However, at this time, the contact surface between the sealing block 55 and the inner wall of the hollow cavity 51 is large, which can not only ensure that gas does not leak, but also relatively reduce the deformation strength of the sealing block 55, thereby relatively improving its service life and reducing the replacement cost.

[0044] In the initial state of the pressure regulating valve 5, the output shaft 56 is not fully inserted into the slot. A sliding hole 542 is provided inside the disc 54, and a push rod 543 is slidably connected inside the sliding hole 542. The inner end of the push rod 543 is located in the slot, and the outer end contacts the left side of the sealing block 55.

[0045] The front end part of the output shaft 56 is arc-shaped.

[0046] Example 3: When the pressure regulating valve 5 is used for a long time, the wear between the outer ring of the sealing block 55 and the inner wall of the hollow cavity 51 is serious. At this time, the turntable 57 is pushed to drive the output shaft 56 to insert into the slot. The arc part at the front end of the output shaft 56 contacts and presses the inner end of the push rod 543, causing it to slide outward through the sliding hole 542, so that its outer end presses the left side of the sealing block 55. The sealing block 55 exerts a thrust force to the right, so that the left part of the sealing block 55 presses the connection part between the air passage 53 and the hollow cavity 51, fully avoiding gas leakage from the connection part, improving the sealing strength, maximizing the utilization of the sealing block 55, and greatly reducing the replacement cost.

[0047] Example 4: When the pressure regulating valve 5 is used for a short time, the sealing block 55 has good deformation ability and good sealing effect. The output shaft 56 is in the initial state, so that the wear of the sealing block 55 can be relatively reduced, and its service life can be further improved.

[0048] A matching block 514 is fixed at the front end of the arc-shaped block 511. A hole is provided on the left side of the matching block 514, and a spring and a sliding rod 515 are provided in the hole. The inner diameter of the middle of the hole is larger than that of both ends, and the spring is arranged in the middle part. The spring and the sliding rod 515 are fixed to each other. One end of the sliding rod 515 is spherical, and the other end is fixed with a supporting block 516. The inner end of the supporting block 516 is arc-shaped, and after the sliding rod 515 moves, the supporting block �16 contacts the outer side of the pressing block 512.

[0049] A top plate 544 is fixed to the front end of the pushing block 541. The surface of the top plate 544 is arc-shaped. After the disc 54 rotates to the limit position, the top plate 544 contacts the spherical part of the sliding rod 515.

[0050] Two elastic springs 513 are arranged oppositely;

[0051] Embodiment 5: When the pressure is adjusted to the maximum, at this time, the top plate 544 rotates to contact the spherical part of the sliding rod 515 and pushes the sliding rod 515 to move. The spring in the hole deforms under force, the supporting block 516 squeezes the pressing block 512 and fits with the left side of the pressing block 512. The left side of the pressing block 512 receives an upward acting force, so as to relatively increase the extrusion force of the sealing block 55 on the inner wall of the hollow cavity 51, thereby relatively increasing the sealing strength, and avoiding the situation that no interaction force is generated after the pushing block 541 rotates to the large arc part of the pressing block 512 due to wear, so as to prevent the influence on the sealing performance;

[0052] Through the two elastic springs 513, when the supporting block 516 squeezes the pressing block 512, the acting forces of the pressing block 512 on the left and right sides of the pushing block 541 are kept balanced, so as to further improve the sealing stability, and achieve the purpose of making the best use of the sealing block 55.

[0053] Two sliding holes 542 are provided and are adjacent to each other;

[0054] Regarding the wear of the sealing block 55, when the wear is relatively serious, the ejector rod 543 is inserted into the right sliding hole 542. At this time, after the ejector rod 543 ejects, it leans against the inner side of the sealing block 55, and the sealing strength is guaranteed;

[0055] When the wear is extremely serious, the ejector rod 543 is inserted into the left sliding hole 542. At this time, after the ejector rod 543 ejects, it leans against the outer side of the sealing block 55. The left part of the sealing block 55 strengthens the extrusion force on the connection part between the air passage 53 and the hollow cavity 51, and the sealing strength is further improved. It is possible not to replace the sealing block 55. After that, if the detected data is inconsistent, then replace the sealing block 55, so as to make full use of each sealing block 55, greatly reduce the cost, and the operation is simple and can not affect the sealing effect.

Claims

1. The detection device for the oxygen flowmeter of the oxygen generator based on the imaging system, including a platform (1), is characterized in that: On one side of the platform (1), a support plate is fixed, and on the other side, a display board (2) is fixed. Inside the support plate, a vision imager (3) is fixed. Above the platform (1), a flowmeter is arranged, and above the flowmeter, a fixed cylinder (4) is provided. The fixed cylinder (4) is fixedly connected to the inside of the display board (2). Above the platform (1), a pressure regulating valve (5) is fixed. The pressure regulating valve (5) is provided with an air inlet and an air outlet. The flowmeter is provided with an input end and an output end. The pressure regulating valve (5) includes a hollow cavity (51), a hollow pipe (52), an air passage (53) and a valve block. The air inlet is connected to an external air source pipeline, the air outlet is connected to the input end pipeline, the output end is connected to an external pipeline. The air inlet is connected to the hollow pipe (52). The hollow pipe (52), the air passage (53) and the hollow cavity (51) communicate with each other. The air outlet is connected to the left side of the hollow cavity (51). The valve block is arranged in the hollow cavity (51) and fits with the air passage (53). The valve block includes a disc (54), a sealing block (55), an output shaft (56) and a turntable (57). Inside the disc (54), a sliding hole (542) is arranged. Inside the sliding hole (542), a push rod (543) is slidably connected. The inner end of the push rod (543) is located in a slot, and the outer end contacts the left side of the sealing block (55). On one side of the pressure regulating valve (5), a through hole is provided, and the output shaft (56) penetrates through the through hole. The turntable (57) is fixed to one end of the output shaft (56), and the disc (54) is fixed to the other end of the output shaft (56). The sealing block (55) is fixedly installed on one side of the disc (54) by screws, and its outer surface fits with the bottom of the air passage (53). In the middle of the disc (54), a slot is arranged. On the outer side of one end of the output shaft (56), an insertion block is provided and inserted into the slot. The sealing block (55) is made of plastic material. On the inner wall of the hollow cavity (51), an arc-shaped block (511) is fixed. Inside the arc-shaped block (511), a pressing block (512) is arranged, and between the pressing block (512) and the arc-shaped block (511), two elastic springs (513) are fixed. On one side of the disc (54), a pushing block (541) is fixed. The edges of the pushing block (541) and the pressing block (512) are both arc-shaped. After the disc (54) rotates clockwise, the pressing block (512) contacts the pushing block (541).

2. The detection device for an oxygen generator flowmeter based on an imaging system according to claim 1, characterized in that: The vision imager (3) is connected to a computer display screen, and inside the computer display screen, a vision imaging system is arranged. The vision imaging system is used to photograph the flowmeter through the vision imager (3) and transmit the image of the float flowmeter into the computer display screen. By comparing the set scale value with the scale value presented in the image, the detection parameters of the float flowmeter are tested. The surfaces of the pressure regulating valve (5) and the turntable (57) are both provided with scales and are aligned with each other.

3. The detection device for an oxygen generator flowmeter based on an imaging system according to claim 2, characterized in that: The inner side of the pressing block (512) is arc-shaped, and from right to left, the radian gradually increases.

4. The detection device for an oxygen generator flowmeter based on an imaging system according to claim 3, characterized in that: In the initial state of the pressure regulating valve (5), the output shaft (56) is not fully inserted into the slot; The front end portion of the output shaft (56) is arc-shaped.

5. The detection device for an oxygen generator flowmeter based on an imaging system according to claim 4, wherein: A mating block (514) is fixed to the front end of the arc-shaped block (511). A hole is provided on the left side of the mating block (514), and a spring and a sliding rod (515) are arranged in the hole. The inner diameter of the middle of the hole is larger than that of both ends, and the spring is arranged in the middle portion. The spring and the sliding rod (515) are fixed to each other. One end of the sliding rod (515) is spherical, and a support block (516) is fixed to the other end. The inner end of the support block (516) is arc-shaped, and after the sliding rod (515) moves, the support block (516) contacts the outer side of the pressing block (512); A top disc (544) is fixed to the front end of the push block (541). The surface of the top disc (544) is arc-shaped, and after the disc (54) rotates to the limit position, the top disc (544) contacts the spherical portion of the sliding rod (515).

6. The detection device for the oxygen generator flowmeter based on the imaging system according to claim 5, wherein: The two elastic springs (513) are arranged oppositely.

7. The detection device for the oxygen generator flowmeter based on the imaging system according to claim 6, wherein: There are two sliding holes (542), which are arranged adjacent to each other.

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