Multifunctional breather valve test board

Abstract

The utility model relates to a multifunctional breather valve testboard, which comprises an air guide channel and a mixed flow buffer tank, the air inlet side of the air guide channel is provided with a high-speed fan, the air outlet side of the air guide channel is connected with the mixed flow buffer tank, and the mixed flow buffer tank is internally provided with a wind resistance structure used for resolving the air outlet strength of the air guide channel. A breather valve fixing structure connected with an air inlet of the breather valve in a sealed mode is arranged on the air outlet side of the mixed flow buffer tank, a positive and negative micro-pressure sensor is arranged in the mixed flow buffer tank, and the high-speed fan and the positive and negative micro-pressure sensor are all connected with a controller. The multifunctional breather valve test board is simple in structure, complete in function, simple in overall structure, high in intelligent degree, stable in air flow control at the sensor, and high in sensor detection precision, and a plurality of tests such as opening pressure test, pressure drop and ventilation test, sealing test and the like of a breather valve can be completed by one piece of equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of breathing valve detection, in particular to a multifunctional breathing valve test bench. Background Art

[0002] A breathing valve is a valve that can isolate the storage tank from the atmosphere within a certain pressure range, and can communicate with the atmosphere (breathe) when the pressure exceeds or falls below this pressure range. Its function is to prevent the storage tank from being damaged due to overpressure or vacuum, and to reduce the evaporation loss of the stored liquid. Setting a breathing valve can not only reduce the gas emission in the tank, thereby reducing the pollution to the atmosphere, but also prevent the storage tank from being damaged due to overpressure or instability due to ultra-vacuum, which plays a certain role in promoting safety and environmental protection. The existing breathing valve detection equipment has a complex structure, occupies a large area and is inflexible, and has a single function. A dedicated vacuum pump is required to detect the pressure. Utility Model Content

[0003] The embodiment of the utility model provides a multifunctional breathing valve test bench to solve the problems in the prior art such as complex equipment structure, large space occupation, inflexibility, single function, etc.

[0004] In order to achieve the above purpose, the embodiment of the utility model provides the following technical solutions:

[0005] A multifunctional breathing valve test bench comprises an air guide channel and a mixed flow buffer tank, wherein a high-speed fan is provided on the air inlet side of the air guide channel, and the air outlet side of the air guide channel is connected to the mixed flow buffer tank, wherein a wind resistance structure for dissolving the air outlet force of the air guide channel is provided in the mixed flow buffer tank, and a breathing valve fixing structure sealingly connected to the air inlet of the breathing valve is provided on the air outlet side of the mixed flow buffer tank, and positive and negative micro-pressure sensors are provided in the mixed flow buffer tank, and the high-speed fan and the positive and negative micro-pressure sensors are both connected to a controller.

[0006] Furthermore, the air guiding channel is provided with a first flow sensor, and the first flow sensor is connected to the controller.

[0007] Furthermore, a plurality of layers of grilles are provided in the air guide channel.

[0008] Furthermore, a first end plate is provided on the air inlet side of the air guide channel, and the high-speed fan seal is arranged on the first end plate.

[0009] Furthermore, the high-speed fan is a high-speed axial flow fan.

[0010] Furthermore, the wind resistance structure includes a wind blocking plate arranged in the mixed flow buffer tank or an inner wall of the mixed flow buffer tank.

[0011] Furthermore, a sealing cover is provided on the outer side of the breathing valve fixing structure, a second flow sensor is provided on the sealing cover, and the second flow sensor is connected to the controller.

[0012] Furthermore, a second end plate is provided between the breathing valve fixing structure and the sealing cover, and a silicone pad or gasket for sealing is provided on the second end plate.

[0013] The utility model embodiment has the following advantages:

[0014] The utility model discloses a multifunctional breathing valve test bench with simple structure and complete functions, and realizes that one device can complete multiple tests such as opening pressure test, pressure drop and ventilation volume test and sealing test of the breathing valve. The overall structure is simple and the degree of intelligence is high. In addition, the airflow control at the sensor is stable and the sensor detection accuracy is high.

[0015] The utility model discloses a multifunctional breathing valve test bench. The test air source adopts a high-speed axial flow fan driven by an inductive brushless motor. The fan has a small size and a high power density. The air flow rate that meets the experimental requirements can be obtained with a very small equipment volume. The positive and negative pressure outputs can be obtained by reversing the rotation direction of the motor. No special vacuum pump is required. The input air pressure can be controlled by adjusting the rotation speed of the high-speed fan.

[0016] The utility model discloses a multifunctional breathing valve test bench with a double high-speed fan design, which causes the airflow velocity in the flow detection tube to be unevenly distributed. The multi-stage air guide grille guides the airflow to pass through the central part of the flow detection tube, and the remaining blocked airflow forms a vortex at the junction of the grille and the detection tube to promote the mixing of the high-speed airflow in the central part and the low-speed airflow, so that the airflow velocity in the airflow detection tube tends to be consistent and stable, thereby improving the accuracy of the flow sensor measurement data.

[0017] The utility model discloses a multifunctional breathing valve test bench equipped with a negative pressure micro-pressure sensor, the installation position of which avoids the direct impact position of the airflow, the sensor probe adopts a probe type, and the detection opening is perpendicular to the incoming flow direction, so as to minimize the influence of the airflow flow pressure on the pressure data measurement and improve the accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0019] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0020] Figure 1 A product structure diagram of a multifunctional breathing valve test bench provided by an embodiment of the utility model;

[0021] Figure 2 An internal structure diagram of a multifunctional breathing valve test bench provided by an embodiment of the utility model;

[0022] Figure 3 A working diagram of a sealing cover of a multifunctional breathing valve test bench provided by an embodiment of the utility model;

[0023] Figure 4 A system structure diagram of a multifunctional breathing valve test bench provided in an embodiment of the utility model.

[0024] In the figure:

[0025] 1. Air guide channel; 2. Mixed flow buffer tank 3. High-speed fan; 4. First end plate; 5. Grille; 6. Breathing valve fixing structure; 7. Controller; 8. Positive and negative micro-pressure sensors; 9. Pressure test module; 10. First flow sensor; 11. Pressure drop and ventilation volume test module; 12. Sealing cover; 13. Second flow sensor; 14. Second end plate; 15. Sealing test module; 16. Breathing valve. DETAILED DESCRIPTION

[0026] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1-4As shown, a multifunctional breathing valve 16 test bench includes an air guide channel 1 and a mixed flow buffer tank 2. A high-speed fan 3 is provided on the air inlet side of the air guide channel 1. The high-speed fan 3 is preferably a high-speed axial flow fan. The number of fans is not limited. According to the size and distribution of the equipment, it is preferred to set 2-3 high-speed fans 3. In this technology, the test air source adopts a high-speed axial flow fan driven by a brushless motor. It has a small size and high power density. It can obtain an air flow that meets the experimental requirements with a very small equipment volume. Controlling the rotation direction of the motor can achieve positive pressure output and negative pressure output. There is no need to set up a special vacuum pump. The fan speed is controlled and adjusted to achieve the size of the input air pressure.

[0028] In order to ensure the output effect of the high-speed fan 3, a first end plate 4 is provided on the air inlet side of the air guide channel 1, and the high-speed fan 3 is sealed on the first end plate 4. The gap between the high-speed fan 3 and the first end plate 4 is sealed by sealant, so that the air inlet of the air guide channel 1 only has an air passage in the high-speed fan 3.

[0029] The air outlet side of the air guide channel 1 is connected to the mixed flow buffer tank 2, and the mixed flow buffer tank 2 is provided with a wind resistance structure for dissolving the wind outlet force of the air guide channel 1. The wind resistance structure can be set as a wind blocking plate in the mixed flow buffer tank 2, or set as the inner wall of the mixed flow buffer tank 2. In the latter, the angle between the air outlet direction of the mixed flow buffer tank 2 and the airflow direction of the air guide channel 1 is in the range of 70°-90°. In this embodiment, the angle between the air outlet direction of the mixed flow buffer tank 2 and the airflow direction of the air guide channel 1 is 90°. The mixed flow buffer tank 2 is provided with a positive and negative micro-pressure sensor 8, and the positive and negative micro-pressure sensor 8 is connected to the controller 7. The wind resistance structure can alleviate the strength of the ejected airflow in the air guide channel 1, making the airflow smooth, thereby ensuring the detection accuracy of the positive and negative micro-pressure sensors 8.

[0030] The outlet side of the mixed flow buffer tank 2 is provided with a breathing valve 16 fixing structure 6 which is sealed to the air inlet of the breathing valve 16. In this embodiment, the breathing valve 16 fixing structure 6 is a connecting flange which can realize a fixed and sealed connection.

[0031] The controller 7 is provided with a pressure testing module 9, which inputs instructions on the operating screen, controls the high-speed fan 3 to rotate forward to inflate the mixed flow buffer tank 2, so that its internal pressure gradually increases, and observes the outlet of the breathing valve 16. When gas begins to be continuously discharged from the outlet, the controller 7 collects data from the positive and negative micro-pressure sensors 8, and the data is the positive pressure opening pressure of the breathing valve 16; conversely, the high-speed fan 3 is rotated in the opposite direction to extract the gas in the mixed flow buffer tank 2, and the vacuum degree gradually increases. When it is observed that gas begins to be continuously inhaled from the outlet of the breathing valve 16, the controller 7 collects data from the micro-pressure sensor, and the data is the negative opening pressure of the exhalation valve, thereby realizing the positive and negative opening pressure detection of the arc valve.

[0032] The air guide channel 1 is provided with a first flow sensor 10, which is connected to the controller 7 and is a gas flow sensor. The controller 7 is provided with a pressure drop and ventilation volume test module 11, which controls the high-speed fan 3 to inlet air, inputs positive pressure to the breathing valve 16, and continues to increase the intake pressure after the breathing valve 16 is opened. At the same time, the data of the first flow sensor 10 is collected, and the flow rate increases with the increase of the intake pressure. The intake pressure and flow rate changes are continuously recorded to obtain a flow rate curve that increases with the increase of pressure until the flow rate data reaches the rated ventilation volume of the tested breathing valve 16, and the experiment ends. The pressure corresponding to the breathing valve 16 when the rated ventilation volume is reached is the operating pressure of the breathing valve 16. The controller 7 calculates the absolute value of the difference between the operating pressure and the opening pressure to obtain the pressure drop data of the breathing valve 16. Conversely, the pressure drop and ventilation volume test of the negative pressure of the breathing valve 16 are the same as those of the positive pressure, but the flow rate collected after the experiment is changed to 50% of the rated ventilation volume. The rated ventilation volume data refers to SY / T0511.1-2010.

[0033] The air guide channel 1 is provided with a multi-layer grille 5, and in this embodiment, three layers of grilles 5 are provided in the air guide channel 1. The design of the high-speed fan 3 or multiple fans leads to uneven distribution of the air flow velocity in the air guide channel 1, which will affect the detection accuracy of the flow sensor, and the multi-layer grille 5 is provided to guide the air flow to pass through the middle of the air guide channel 1, and the remaining air flow is blocked at the junction of the grille 5 and the side wall of the air guide channel 1, and a vortex is formed at the junction to promote the mixing of the high-speed air flow in the middle and the low-speed air flow, and finally make the air flow in the air guide channel 1 tend to be consistent and stable, thereby ensuring the detection accuracy of the flow sensor.

[0034] like Figure 3 As shown, a sealing cover 12 is provided on the outside of the fixing structure 6 of the breathing valve 16, and a second flow sensor 13 is provided on the sealing cover 12. The second flow sensor 13 is connected to the controller 7, and the second flow sensor 13 is a gas flow sensor. A second end plate 14 is provided between the fixing structure 6 of the breathing valve 16 and the sealing cover 12, and a silicone pad or gasket for sealing is provided on the second end plate 14. The second end plate 14 is used to achieve the sealing of the sealing cover 12, so that the sealing cover 12 is connected to the mixed flow buffer tank 2. However, since the mixed flow buffer tank 2 is sealed and connected to the breathing valve 16, it can be achieved that the gas in the mixed flow buffer tank 2 must pass through the breathing valve 16 before entering the sealing cover 12.

[0035] The controller 7 is provided with a sealing test module 15, which is used to control the high-speed fan 3 to inflate, pressurize the breathing valve 16 to 75% of the opening pressure, collect the data of the second flow sensor 13, which is the actual leakage of the breathing valve 16, and then compare the actual leakage with the standard leakage. If the actual leakage is lower than the standard leakage, the sealing test module 15 determines that the sealing of the breathing valve 16 is qualified; on the contrary, if the actual leakage exceeds the standard leakage, the sealing is unqualified. The negative pressure test method for sealing is the same as the positive pressure test, in which the test pressure is 75% of the vacuum opening pressure.

[0036] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A multifunctional breathing valve test bench, characterized in that: It includes an air guide channel and a mixed flow buffer tank, the air inlet side of the air guide channel is provided with a high-speed fan, the air outlet side of the air guide channel is connected to the mixed flow buffer tank, the mixed flow buffer tank is provided with a wind resistance structure for dissolving the air outlet force of the air guide channel, the air outlet side of the mixed flow buffer tank is provided with a breathing valve fixing structure sealed with the air inlet of the breathing valve, the mixed flow buffer tank is provided with positive and negative micro-pressure sensors, and the high-speed fan and the positive and negative micro-pressure sensors are both connected to a controller.

2. A multifunctional breathing valve test bench according to claim 1, characterized in that: The air guide channel is provided with a first flow sensor, and the first flow sensor is connected to a controller.

3. A multifunctional breathing valve test bench according to claim 2, characterized in that: A plurality of layers of grilles are arranged in the air guide channel.

4. The multifunctional breathing valve test bench according to claim 1 is characterized in that: A first end plate is provided on the air inlet side of the air guide passage, and the high-speed fan seal is provided on the first end plate.

5. A multifunctional breathing valve test bench according to claim 1 or 4, characterized in that: The high-speed fan is a high-speed axial flow fan.

6. The multifunctional breathing valve test bench according to claim 1 is characterized in that: The wind resistance structure includes a wind blocking plate arranged in the mixed flow buffer tank or an inner wall of the mixed flow buffer tank.

7. The multifunctional breathing valve test bench according to claim 1 is characterized in that: A sealing cover is arranged on the outer side of the breathing valve fixing structure, a second flow sensor is arranged on the sealing cover, and the second flow sensor is connected to a controller.

8. The multifunctional breathing valve test bench according to claim 2 is characterized in that: A second end plate is provided between the breathing valve fixing structure and the sealing cover, and a silicone pad or a gasket for sealing is provided on the second end plate.

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