CN210426908U

CN210426908U - Composite dryer backflow time and regeneration volume testing system

Info

Publication number: CN210426908U
Application number: CN201921666730.XU
Authority: CN
Inventors: 郭斌; 杨双军; 方超奇; 胡江华; 姚恺其; 张霖成; 陈汪彬; 钱鹏; 蔡登�
Original assignee: Hangzhou Wolei Intelligent Technology Co ltd
Current assignee: Hangzhou Wolei Intelligent Technology Co ltd
Priority date: 2019-10-07
Filing date: 2019-10-07
Publication date: 2020-04-28
Anticipated expiration: 2029-10-07

Abstract

The utility model discloses a composite dryer backflow time and regeneration volume test system, which comprises an industrial PC, a data acquisition card AI module, an air pressure sensor, a differential pressure sensor, a data acquisition card DO module, a duplex piece, an air storage tank, a solenoid valve, a silencer, an air cylinder and a reference cavity; the industrial PC is simultaneously connected with a data acquisition card AI module and a data acquisition card DO module, the data acquisition card AI module is connected with an air pressure sensor and a differential pressure sensor, the data acquisition card DO module is connected with an electromagnetic valve, the electromagnetic valve is connected with a cylinder, the air pressure sensor is arranged at an air inlet and an air outlet of the composite dryer, the differential pressure sensor is arranged at the air inlet and the air outlet of the composite dryer, and a silencer is connected with the air outlet of the electromagnetic valve. The backflow time and regeneration volume testing system of the combined dryer can be used for quickly and stably testing, interference of human factors is avoided in the testing process, and accuracy is greatly improved.

Description

Composite dryer backflow time and regeneration volume testing system

Technical Field

The invention relates to the field of electronic control brake system product detection devices, in particular to a system and a method for testing the backflow time and the regeneration volume of a combined dryer, which can be applied to the performance detection of the dryer.

Background

The composite dryer is a new product combining an air dryer and a four-loop protection valve. The automobile air dryer is mainly used in an automobile air brake pipeline and used for removing impurities such as moisture in compressed air and providing dry and clean air for an automobile brake system; the four-loop protection valve is used for air pressure distribution and air supply quantity scheduling of an automobile multi-loop air braking system, and can automatically close a failed loop so as to ensure that inflation and air supply of other loops are not influenced and further ensure driving safety.

At present, most domestic manufacturers have independent detection devices for the automobile air dryer and the four-loop protection valve, but do not have a composite dryer detection method for combining the automobile air dryer and the four-loop protection valve. Because the test of the backflow time and the regeneration volume in the combined dryer is an extremely important part of the performance test of the combined dryer, the design of a test system with higher detection efficiency and detection precision is particularly important.

Disclosure of Invention

The invention provides a system and a method for testing the backflow time and the regeneration volume of a composite dryer, aiming at the defects of the prior art.

A backflow time and regeneration volume test system of a combined dryer comprises a gas path system, wherein detection gas paths are communicated with a gas inlet and each gas outlet of the combined dryer, and each detection gas path comprises a gas pressure sensor and a differential pressure sensor; the detection gas path of each gas outlet is connected with a gas storage tank of the gas outlet;

the test system also comprises a fixture tool, wherein the fixture tool is provided with a cylinder for plugging an air inlet and an air outlet of the combined dryer;

the test system is provided with an industrial PC, the industrial PC is connected with a data acquisition card AI module and a data acquisition card DO module, the data acquisition card AI module is connected with each air pressure sensor and each differential pressure sensor, and the data acquisition card DO module controls the movement of the air cylinder through an electromagnetic valve.

A method for testing the backflow time and the regeneration volume of a composite dryer is characterized by comprising the following steps:

step 1, mounting a piece to be tested, and plugging an air inlet and each air outlet by an air cylinder;

step 2, the system carries out integral sealing detection on the composite dryer, and the detected sealing leakage pressure difference data is displayed by an industrial PC; comparing the sealing leakage pressure difference data with the specified maximum allowable pressure drop to determine whether the data is qualified;

step 3, the system controls the air source to blow air to the air inlet, pressurizes the composite dryer, and stops when the cutoff pressure is reached;

step 4, judging whether the cutting pressure of the composite dryer meets the requirement or not according to the measured data curve;

step 5, opening the load cavity, carrying out back flushing on the composite dryer by using an air storage tank at the air outlet, recording the time to obtain the backflow time of the composite dryer, measuring a pressure difference value by using a differential pressure sensor, and simultaneously measuring the regeneration volume of the composite dryer through calculation;

and 6, after the detection is finished, exhausting the system, returning the cylinder to the original position, and keeping the system in a standby state again.

Further, the sealing detection in step 1 is carried out by acquiring air pressure values of an air inlet and an air outlet of the composite dryer by the industrial PC through the data acquisition card AI module and the air pressure sensor, carrying out median filtering processing on the acquired air pressure values, automatically recording air pressure acquisition time and the processed air pressure values by the system, displaying the air pressure values on a software chart, and simultaneously displaying the current air pressure values of the sensor in real time; and after the collection is finished, subtracting the air pressure value of the air outlet from the obtained air pressure value of the air inlet to obtain the sealing leakage pressure difference, comparing the sealing leakage pressure difference with the maximum allowable pressure drop specified in the software parameter setting, and judging the qualification of the sealing performance of the composite dryer. The invention has the beneficial effects that: the device can quickly and stably test the backflow time and the regeneration volume of the combined dryer, avoids the interference of human factors in the test process, and greatly improves the accuracy.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

FIG. 2 is a gas source at 1; 2 is a manual ball valve; 3 is a filtering pressure reducing valve; 4 is an air inlet and air storage tank; 5-6 is an electric proportional valve; 7-10 is an air inlet electromagnetic valve; 11-21 are exhaust electromagnetic valves; 22-27 are balance valves; 28-41 are pneumatic control valves; 42-49 are needle valves; 50-60 parts of a silencer; 61-66 are air pressure sensors; 67-72 are differential pressure sensors; 74-78 are exhaust gas storage tanks; 80-81 are manual ball valves; 82-83 are one-way valves; 73. 79 are two 40L air tanks.

FIG. 3 shows a push-down cylinder 1; 2 is a side seal cylinder; 3 is a piece to be detected; 4, a plugging plug; 5 is a base; 6 is a clamp bottom plate

Detailed Description

The invention is further described below with reference to the figures and examples.

Examples

A backflow time and regeneration volume test system of a combined dryer comprises an industrial PC, a data acquisition card AI module, an air pressure sensor, a differential pressure sensor, a data acquisition card DO module, an air storage tank, an electromagnetic valve, an air cylinder and a reference cavity; the industrial PC is simultaneously connected with a data acquisition card AI module and a data acquisition card DO module, the data acquisition card AI module is connected with an air pressure sensor and a differential pressure sensor, the data acquisition card DO module is connected with an electromagnetic valve air pressure sensor and is arranged at the air inlet and the air outlet of the combined dryer, and the differential pressure sensor is arranged at the air inlet and the air outlet of the combined dryer. The industrial PC is used for controlling the data acquisition card AI module and the data acquisition card DO module, and simultaneously recording and calculating data fed back by the data acquisition card AI module and the data acquisition card DO module; the industrial PC controls the electromagnetic valve through the data acquisition card DO module, the electromagnetic valve controls the air cylinder, the air cylinder controls the clamp tool to plug each port of the combined dryer, the air pressure sensor acquires the air pressure of the air inlet and the air outlet of the combined dryer, the air pressure value is fed back to the industrial PC through the data acquisition card AI module, the differential pressure sensor acquires the differential pressure of the air inlet and the air outlet of the combined dryer, and the differential pressure value is fed back to the industrial PC through the data acquisition card AI module.

The method for testing the backflow time and the regeneration volume of the composite dryer comprises the following steps:

step 1, fixing a to-be-tested piece on a clamp base, clamping the to-be-tested piece by a downward pressing cylinder and a side sealing cylinder, and plugging each air inlet and each air outlet; the system carries out integral sealing detection on the composite dryer, and the detected sealing leakage pressure difference data is displayed by an industrial PC;

step 2, comparing the sealing leakage pressure difference data with the specified maximum allowable pressure drop to determine whether the data is qualified;

step 3, the system starts to pressurize the composite dryer, and stops when the pressure reaches the cutting pressure;

step 5, opening the load cavity, carrying out back flushing on the composite dryer, recording the time to obtain the backflow time of the composite dryer, measuring a pressure difference value by using a differential pressure sensor, and simultaneously measuring the regeneration volume of the composite dryer through calculation;

As a preferred scheme, the sealing detection in step 1 is carried out by acquiring the air pressure values of the air inlet and the air outlet of the composite dryer by the industrial PC through the data acquisition card AI module and the air pressure sensor, carrying out median filtering processing on the acquired air pressure values, automatically recording the air pressure acquisition time and the processed air pressure values by the system, displaying the air pressure values on a software chart, and simultaneously displaying the current air pressure value of the sensor on the right control piece in real time; and after the collection is finished, subtracting the air pressure value of the air outlet from the air pressure value of the air inlet to obtain the sealing leakage pressure difference, comparing the pressure difference with the maximum allowable pressure drop specified in the software parameter setting, and judging the qualification of the sealing performance of the composite dryer.

Preferably, the calculation formula of the regeneration volume in step 5 is that the regeneration volume of the composite dryer is obtained by multiplying the pressure difference measured by the differential pressure sensor by the volume and dividing by a standard atmospheric pressure.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.

Claims

1. A test system for backflow time and regeneration volume of a combined dryer comprises a gas path system and is characterized in that detection gas paths are communicated with a gas inlet and each gas outlet of the combined dryer, and each detection gas path comprises a gas pressure sensor and a differential pressure sensor; the detection gas path of each gas outlet is connected with a gas storage tank of the gas outlet;