阅读说明：本技术 基于不同压力量程的多通道并行输出自动标准压力发生器 (Multi-channel parallel output automatic standard pressure generator based on different pressure ranges ) 是由 王洋 盛晓岩 于 2019-11-27 设计创作，主要内容包括：本发明公开的基于不同压力量程的多通道并行输出自动标准压力发生器,属于压力校准技术领域。本发明包括输入口、过滤器、比例阀组、气容A、电磁阀组、标准压力传感器、溢流阀、气容B、测试接口；所述气源接口即为输入。本发明能够实现气体压力参数现场校准中多个压力被校对象同时校准,不需要更换模块和切换通道,还能够根据需要并行扩展更多通道数,还能够对不同压力量程的多个压力被校对象进行校准,为各种不同量程的压力参数的同步现场校准提供条件和保障。本发明能够有效地实现不同量程的多路多个被校对象的同时校准,避免拆卸送检后器具在现场使用中的各种问题,尤其避免单个逐一校准造成的人力物力和时间的浪费。(The invention discloses a multi-channel parallel output automatic standard pressure generator based on different pressure ranges, and belongs to the technical field of pressure calibration. The device comprises an input port, a filter, a proportional valve group, a gas capacity A, an electromagnetic valve group, a standard pressure sensor, an overflow valve, a gas capacity B and a test interface; the air source interface is the input. The invention can realize the simultaneous calibration of a plurality of pressure corrected objects in the field calibration of the gas pressure parameters, does not need to replace modules and switch channels, can expand more channels in parallel according to the needs, can calibrate a plurality of pressure corrected objects with different pressure ranges, and provides conditions and guarantees for the synchronous field calibration of the pressure parameters with different ranges. The invention can effectively realize the simultaneous calibration of a plurality of multipath calibrated objects with different measuring ranges, avoids various problems of appliances in field use after disassembly and inspection, and particularly avoids the waste of manpower, material resources and time caused by single one-by-one calibration.)

1. The multichannel parallel output automatic standard pressure generator based on different pressure ranges is characterized in that: the device comprises an input port (1), a filter (2), a proportional valve group (3), a gas capacity A (4), an electromagnetic valve group (5), a standard pressure sensor (8), an overflow valve (6), a gas capacity B (7) and a test interface (9); the air source interface (1) is an input;

the multi-channel parallel output channels with different pressure ranges comprise a 10kPa pressure test channel (10), a 50kPa pressure test channel (11), a 350kPa pressure test channel (12), a 1MPa pressure test channel (13) and a 3.5MPa pressure test channel (14);

the input port (1) is used as an air source interface and provides enough pressure air source for a standard pressure generator;

the filter (2) mainly has the functions of filtering gas source gas to provide clean gas for a standard pressure generator and prevent various precision pressure valves from being damaged;

the gas volume A (4) and the gas volume B (7) are used for storing gas so as to improve the gas inlet speed of the valve and buffer the gas inlet pressure of the valve;

the proportional valve group (3) is used for adjusting the pressure proportion, supplying proper air inlet pressure to a test channel in a preset range, and preventing the overtravel damage of an electromagnetic valve and a pressure sensor in a small-range channel;

the electromagnetic valve group (5) comprises an electromagnetic valve A and an electromagnetic valve B which jointly form a pressure control system;

the electromagnetic valve group (5) is used for accurately adjusting pressure; the electromagnetic valve A is used for air inlet control, and the electromagnetic valve B is used for exhaust control;

the overflow valve (6) is used for exhausting air outwards to prevent the standard pressure sensor (8) from being damaged due to overhigh pressure in the pipeline;

the standard pressure sensor (8) is used for measuring the output pressure, providing a feedback voltage signal for the pressure control system, and achieving the target pressure after multiple times of information feedback and cycle control;

the test interface (9) is used for providing an interface for the object to be corrected.

2. The multi-channel parallel output automatic standard pressure generator based on different pressure ranges of claim 1, wherein: the working method is that the automatic standard pressure generator based on multi-channel parallel output of different pressure ranges supplies gas to the whole device by accessing a gas source at an input port, the gas supplied by the gas source is purified by a filter (2), then enters a proportional valve group (3) to carry out partial pressure of different ranges, the gas after partial pressure is stored in a gas volume A (4), then is subjected to accurate pressure control by a gas inlet and exhaust electromagnetic valve of an electromagnetic valve group (5), is fed back by a standard pressure sensor (8), reaches target pressure after multiple information feedback and cycle control, and stores standard pressure gas by a gas volume B (7); the object to be calibrated is accessed from the test interface (9) for calibration, and a plurality of objects to be calibrated can be connected in series at the same measuring range according to the requirement; the function of the overflow valve (6) prevents damage to the standard pressure sensor (8) when the pressure overshoots.

Technical Field

The invention relates to an automatic pressure standard generator in gas pressure parameter field calibration, in particular to an automatic pressure standard generator based on multi-channel parallel output of different pressure ranges, and belongs to the technical field of pressure calibration.

Background

The metering and testing technology of pressure magnitude is one of the basic metering technologies in the field of mechanical metering. The measurement and test of the liquid pressure as an important part of the pressure test are widely applied to the fields of aviation, aerospace, ships, oil exploration and the like, in order to ensure the safety of scientific research and production work in the fields, the pressure instruments need to be checked and calibrated regularly, and the accuracy of the pressure value directly influences the smooth completion of the scientific research and production of the weapon equipment.

Through investigation of the current domestic use units, it is found that the calibration for the pressure parameter is mainly a laboratory calibration method. However, due to the limitation of the laboratory calibration method, it is a trend to use a pressure generating device with high accuracy and good control stability as a field calibration system. At present, the standard pressure generating devices widely used at home and abroad mainly comprise a piston pressure gauge and an automatic standard pressure generator. Piston manometers have the outstanding advantages of high accuracy, good long-term stability and the like, and almost all high-level calibration laboratories around the world use piston manometers as pressure measurement reference instruments. The product of the existing automatic pressurizing and weight-adding full-automatic piston pressure gauge abroad can realize full-automatic calibration, but due to the principle and the structure of the piston pressure gauge, the piston pressure gauge has the defects of high labor intensity, low working efficiency and poor portability, can only generate discrete pressure points, is more suitable to be used as a metering standard device used in a laboratory, and has great limitation when being used as a field calibration system.

The automatic standard pressure generator is a product combining sensing technology, computer technology and control technology, and is essentially characterized in that the target pressure appointed by a user is accurately and stably generated through controlling a fluid source, and simultaneously the measured pressure can be digitally displayed in real time. There are limitations to using an automated standard pressure generator as an in situ calibration system. When the pressure calibration device is applied to an engineering field and on-line, problems such as multiple calibrated objects, different measuring range and the like exist, and the calibration needs to be carried out one by one, and cannot be carried out simultaneously so as to save time and labor. At present, multi-channel controllers in domestic and foreign markets are all designed in a modular mode, modules need to be replaced when pressure parameters in different measuring range ranges are calibrated each time, and controllers which can be calibrated in a multi-channel parallel mode in different measuring range ranges are not available in the market. It is therefore desirable to redesign an automatic pressure calibration standard generator that can be calibrated simultaneously for multiple pressure calibrated objects at different span ranges. When the pressure calibration system is designed, the pressure calibration device can ensure automatic calibration of pressure parameters and can perform multi-channel parallel output of different ranges. Aiming at the problems, the automatic standard pressure generator based on the multi-channel parallel output of different pressure ranges is provided, and conditions and guarantee are provided for synchronous field calibration of pressure parameters of various different ranges.

Disclosure of Invention

In order to solve the problem that a plurality of pressure corrected objects can not be calibrated simultaneously in the field calibration of gas pressure parameters, in particular to the problem of calibrating a plurality of pressure corrected objects with different pressure ranges, the invention discloses a multi-channel parallel output automatic standard pressure generator based on different pressure ranges, which aims to solve the technical problems that: the automatic standard pressure generator based on multi-channel parallel output of different pressure ranges is provided, a plurality of pressure corrected objects can be calibrated simultaneously in gas pressure parameter field calibration, the plurality of pressure corrected objects of different pressure ranges can be calibrated, and conditions and guarantee are provided for synchronous field calibration of the pressure parameters of various different ranges.

The purpose of the invention is realized by the following technical scheme.

The invention discloses a multi-channel parallel output automatic standard pressure generator based on different pressure ranges, which comprises an input port, a filter, a proportional valve group, a gas capacity A, an electromagnetic valve group, a standard pressure sensor, an overflow valve, a gas capacity B and a test interface, wherein the input port is connected with the filter; the air source interface is the input.

The multi-channel parallel output channels with different pressure ranges comprise a 10kPa pressure test channel, a 50kPa pressure test channel, a 350kPa pressure test channel, a 1MPa pressure test channel and a 3.5MPa pressure test channel;

the input port is used as an air source interface to provide enough pressure air source for the standard pressure generator.

The filter has the main function of filtering the gas source gas to provide clean gas for the standard pressure generator, and preventing various precision pressure valves from being damaged.

The gas volume A and the gas volume B are used for storing gas so as to improve the gas inlet speed of the valve and buffer the gas inlet pressure of the valve.

The proportional valve group is used for adjusting the pressure proportion, supplying proper air inlet pressure to a test channel in a preset range, and preventing the overtravel damage of an electromagnetic valve and a pressure sensor in a small-range channel.

The electromagnetic valve group comprises an electromagnetic valve A and an electromagnetic valve B which jointly form a pressure control system.

The electromagnetic valve group is used for accurately adjusting pressure. Solenoid valve a is used for intake control and solenoid valve B is used for exhaust control.

The overflow valve is used for exhausting air outwards, and the standard pressure sensor is prevented from being damaged due to overhigh pressure in the pipeline.

The standard pressure sensor is used for measuring the output pressure, providing a feedback voltage signal for the pressure control system, and achieving the target pressure after multiple times of information feedback and cycle control.

The test interface is used for providing an interface for the object to be corrected.

The invention discloses a working method of a multi-channel parallel output automatic standard pressure generator based on different pressure ranges, which comprises the following steps: the automatic standard pressure generator based on the multichannel parallel output of different pressure ranges is through inserting the air supply at the input port and being whole device air feed, the gas that the air supply supplied with purifies through the filter, then get into proportional valve group and carry out the partial pressure of different ranges, the gas storage after the partial pressure is in gas capacity A, the gas admission and the exhaust solenoid valve through the solenoid valve group carry out accurate pressure control again, feed back through standard pressure sensor, after many times information feedback and cycle control, reach target pressure, and through gas capacity B storage standard pressure gas. The object to be calibrated is accessed from the test interface for calibration, and a plurality of objects to be calibrated can be connected in series at the same measuring range according to the requirement. The relief valve functions to prevent damage to the reference pressure sensor during pressure overshoot.

Has the advantages that:

the multichannel parallel output automatic standard pressure generator based on different pressure ranges can simultaneously calibrate pressure parameters of different ranges of micro pressure, medium pressure and high pressure, does not need to replace modules and switch channels, can also parallelly expand more channels according to needs, provides a basis and an achievable technical means for multichannel parallel synchronous pressure calibration of different pressure ranges in field calibration, effectively realizes simultaneous calibration of multiple channels and multiple calibrated objects of different ranges, avoids various problems of appliances in field use after disassembly and inspection, and particularly avoids waste of manpower, material resources and time caused by single one-by-one calibration. The method can be applied to field gas pressure calibration, particularly to multi-path simultaneous online calibration of a large system with a plurality of pressure ranges, and provides an effective technical means and method for multi-path parallel calibration of different ranges in field, online calibration and even in-situ calibration.

Drawings

Fig. 1 is a schematic structural diagram of an automatic standard pressure generator based on multi-channel parallel output of different pressure ranges.

The pressure testing device comprises a 1-input port, a 2-filter, a 3-proportional valve bank, a 4-air volume A, a 5-electromagnetic valve bank, a 6-overflow valve, a 7-air volume B, a 8-standard pressure sensor, a 9-testing interface, a 10-10 kPa pressure testing channel, an 11-50 kPa pressure testing channel, a 12-350 kPa pressure testing channel, a 13-1 MPa pressure testing channel and a 14-3.5 MPa pressure testing channel.

Note: in the figure, only five channels from micro pressure, small pressure, medium pressure to high pressure are listed, and the channels can be expanded according to requirements in practical application.

Detailed Description

The following detailed description of embodiments of the present invention will be made with reference to the accompanying drawings and examples.

As shown in fig. 1, the automatic standard pressure generator based on multi-channel parallel output of different pressure ranges disclosed in this embodiment includes an input port 1, a filter 2, a proportional valve group 3, a pneumatic capacitor a4, an electromagnetic valve group 5, an overflow valve 6, a pneumatic capacitor B7, a standard pressure sensor 8, and a test interface 9;

the multi-channel parallel output channels with different pressure ranges comprise a 10kPa pressure test channel 10, a 50kPa pressure test channel 11, a 350kPa pressure test channel 12, a 1MPa pressure test channel 13 and a 3.5MPa pressure test channel 14;

note: in the embodiment, only five channels from micro pressure, small pressure, medium pressure to high pressure are listed, and the channels can be expanded according to requirements in practical application.

The input port 1 serves as an air source interface for providing a standard pressure generator with a sufficient air source of pressure.

The filter 2 is used to filter the source gas to provide clean gas to the standard pressure generator to prevent damage to the various precision pressure valves.

The gas container A4 and the gas container B7 are used for storing a certain amount of gas so as to increase the valve inlet speed and buffer the valve inlet pressure.

The proportional valve group 3 is used for adjusting the pressure proportion, supplying proper air inlet pressure to a test channel in a certain range, and preventing the overtravel damage of an electromagnetic valve and a pressure sensor in a small-range channel.

The electromagnetic valve group 5 comprises an electromagnetic valve A and an electromagnetic valve B which jointly form a pressure control system.

The electromagnetic valve group 5 is used for accurately adjusting pressure. Solenoid valve a is used for intake control and solenoid valve B is used for exhaust control.

The overflow valve 6 is used for exhausting air outwards, and the standard pressure sensor is prevented from being damaged due to overhigh pressure in the pipeline.

The standard pressure sensor 8 is used for measuring the output pressure, providing a feedback voltage signal for the pressure control system, and achieving the target pressure after multiple times of information feedback and cycle control.

The test interface 9 provides an interface for the object to be calibrated.

The multi-channel parallel output automatic standard pressure generator based on different pressure ranges disclosed by the embodiment supplies air to the whole system by accessing an air source at an input port 1, wherein the range of accessing the air source is larger than the maximum range in the channel, for example, the air source is accessed to 3.5 MPa; the gas supplied by the gas source is filtered to remove impurities through the filter 2 for purification; the filtered gas enters a proportional valve group 3 (the gas source pressure is 3.5MPa and is directly communicated with the proportional valve group, so that the proportional valve group with the pressure more than or equal to 3.5MPa is selected here) to perform partial pressure with different measuring ranges, the partial pressure is higher than the target pressure of a channel, the pressure of 15kPa is obtained through partial pressure of the proportional valve group by taking a 10kPa pressure test channel 10 as an example, the gas after partial pressure is stored in a gas volume A4, and the volume of the gas volume A is 200 ml; the accurate pressure control is carried out through the air inlet solenoid valve and the air outlet solenoid valve of the solenoid valve group 5 (consisting of an air inlet solenoid valve and an air outlet solenoid valve), the feedback is carried out through the standard pressure sensor 8, the target pressure is reached after a plurality of times of information feedback and cycle control, and the standard pressure gas is stored through the gas capacity B7. The object to be calibrated is accessed from the test interface 9 for calibration (note: the same range can be used for connecting multiple objects to be calibrated in series). The relief valve 6 functions to prevent damage to the reference pressure sensor during pressure overshoot.

The above detailed description is intended to illustrate the objects, aspects and advantages of the present invention, and it should be understood that the above detailed description is only exemplary of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.