CN112284649A - Multi-pipeline pressure flow coefficient testing device and testing method - Google Patents
Multi-pipeline pressure flow coefficient testing device and testing method Download PDFInfo
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- CN112284649A CN112284649A CN202011265427.6A CN202011265427A CN112284649A CN 112284649 A CN112284649 A CN 112284649A CN 202011265427 A CN202011265427 A CN 202011265427A CN 112284649 A CN112284649 A CN 112284649A
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- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
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Abstract
The invention discloses a multi-pipeline pressure flow coefficient testing device and a testing method, wherein the testing device comprises the following steps: the main gas transmission pipeline assembly comprises a main gas transmission pipe, a one-way valve, a first pressure-stabilizing gas storage tank, a switch valve, a first pressure regulating valve and a filter, wherein the one-way valve, the first pressure-stabilizing gas storage tank, the switch valve, the first pressure regulating valve and the filter are sequentially arranged on the main gas transmission pipe along the gas transmission direction; the device comprises more than two groups of test pipeline assemblies, wherein each test pipeline assembly comprises a test air pipe, and a first electromagnetic valve, a second pressure regulating valve, a flow sensor and a pressure sensor which are sequentially arranged on the test air pipe along the air conveying direction; the air inlet ends of the test air pipes of more than two groups of test pipeline assemblies are respectively connected with the air outlet end of the main air pipe, and each test air pipe is provided with an air outlet end used for being communicated with a product to be tested; the device can be used for simultaneously testing the shell and the water path of the new energy automobile motor, namely equivalently testing a plurality of products to be tested, and has the characteristics of good stability, good testing accuracy and high testing efficiency.
Description
Technical Field
The invention relates to the technical field of nondestructive testing, in particular to a multi-pipeline pressure flow coefficient testing device and a testing method.
Background
As the industry develops, measuring fluid flow parameters is one of the most important links in industrial measurements. Various types of flowmeters and measuring methods are successively developed in order to adapt to multiple purposes, but when a new energy automobile motor requires synchronous testing of a shell, a water channel and an oil channel or testing of a plurality of products to be tested is required for a test workpiece on the market, the existing flow parameter testing method is to test pipelines to be tested one by one through a flow testing instrument, the testing process also requires switching of interfaces of different pipelines for testing after sealing, the efficiency is low in the product flow testing process, and meanwhile, the risk of leakage after the sealing is switched for multiple times is also existed.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the invention is to provide a multi-pipeline pressure flow coefficient testing device which can simultaneously test a plurality of products to be tested and has the characteristics of good stability, good testing accuracy and high testing efficiency.
The invention also aims to provide a testing method of the multi-pipeline pressure flow coefficient testing device, which has the characteristics of convenience in operation and high testing efficiency.
One of the purposes of the invention is realized by adopting the following technical scheme:
a multi-channel pressure flow coefficient test apparatus, comprising:
the main gas transmission pipeline assembly comprises a main gas transmission pipe, a one-way valve, a first pressure-stabilizing gas storage tank, a switch valve, a first pressure regulating valve and a filter, wherein the one-way valve, the first pressure-stabilizing gas storage tank, the switch valve, the first pressure regulating valve and the filter are sequentially arranged on the main gas transmission pipe along the gas transmission direction;
the device comprises more than two groups of test pipeline assemblies, wherein each test pipeline assembly comprises a test air pipe, and a first electromagnetic valve, a second pressure regulating valve, a flow sensor and a pressure sensor which are sequentially arranged on the test air pipe along the air conveying direction; the air inlet ends of the test air pipes of the test pipeline assembly are respectively connected with the air outlet end of the main air pipe, and each test air pipe is provided with an air outlet end used for being communicated with a product to be tested.
In an optional embodiment, the filter further comprises a branch gas pipe, wherein the gas inlet end of the branch gas pipe is connected with the main gas pipe, and the joint of the branch gas pipe and the main gas pipe is positioned at the rear end of the filter along the gas conveying direction; the air outlet end of the branch air delivery pipe is externally connected with air using equipment.
In an optional implementation mode, a second pressure stabilizing gas storage tank and a stop valve are sequentially installed on the main gas pipe along the gas conveying direction, and the second pressure stabilizing gas storage tank is located at the rear end of the joint of the branch gas pipe and the main gas pipe along the gas conveying direction.
In an alternative embodiment, a pressure gauge and a pressure switch are provided on the first pressure regulating valve.
In an optional embodiment, the device further comprises a gas source device;
the main gas transmission pipe comprises a first hose, a second hose, a first hard pipe, a third hose, a fourth hose, a second hard pipe and a multi-way pipe joint; the check valve is arranged on the first hose, and the air inlet end of the first hose is connected with the air outlet of the air source device; the air outlet end of the first hose is connected with the air inlet end of the multi-way pipe joint through a first pressure-stabilizing air storage tank, a second hose, a first hard pipe, a third hose, a second pressure-stabilizing air storage tank, a fourth hose and a second hard pipe in sequence; the switch valve, the first pressure regulating valve and the filter are arranged on the first hard pipe, and the stop valve is arranged on the second hard pipe;
the test air pipe comprises a third hard pipe, a fifth hose and a fourth hard pipe; the air inlet end of the third hard tube is connected with one of the air outlet ends of the multi-way tube joint, and the air outlet end of the third hard tube is connected with the air inlet end of the fourth hard tube through a fifth hose in sequence; the first electromagnetic valve, the second pressure regulating valve, the flow sensor and the pressure sensor are arranged on the third hard pipe.
In an optional embodiment, the switching valve, the first pressure regulating valve, the second pressure regulating valve and the flow sensor are all provided with mounting structures for being fixedly connected with the external plate.
In an optional embodiment, the multi-way pipe joint is a three-way pipe with one inlet and two outlets, a four-way pipe with one inlet and three outlets, a five-way pipe with one inlet and four outlets or a six-way pipe with one inlet and five outlets, and the number of the test pipe assemblies is two, three, four or five.
In an optional embodiment, a second electromagnetic valve is further disposed on the fourth hard tube.
The second purpose of the invention is realized by adopting the following technical scheme:
a testing method of a multi-pipeline pressure flow coefficient testing device comprises the following steps:
a preparation step; the air outlet ends of more than two groups of test air pipes are respectively in one-to-one corresponding sealing communication with the air inlets of more than two products to be tested, and the air outlets of the products to be tested are communicated with the atmosphere; firstly, closing a switch valve and a first electromagnetic valve, inflating a first pressure-stabilizing gas storage tank by a gas source through a one-way valve, opening the switch valve after a preset inflation time, regulating the pressure of the gas through a first pressure regulating valve, and filtering moisture through a filter;
and (3) testing: the air outlets of all products to be tested are blocked, then the first electromagnetic valves on all the test air pipes are opened, the products to be tested are respectively inflated by the air with moisture filtered, in the test process, the air pressure of the products to be tested is detected by the pressure sensor, the pressure sensor sends the detected pressure information to the central controller, and the central controller controls the opening of the second pressure regulating valve according to the pressure information fed back by the pressure sensor, so that the test air pipes keep constant pressure; detecting the flow of a product to be detected through a flow sensor, and after a preset test time, when the actual flow change value in the test time reaches a preset flow change value prestored in a central controller, determining that the product to be detected is qualified, otherwise, determining that the product to be detected is unqualified;
and (3) an exhaust link: and after the test is finished, closing the switch valve and the first electromagnetic valve, and opening the gas outlets of all the products to be tested so as to empty the gas in the test pipeline.
The flow coefficient is the volume flow, or mass flow, i.e. the flow capacity, of the medium flowing through the valve, which is maintained at a constant pressure in the test conditions per unit time in the conduit. A larger value of the flow coefficient indicates a smaller pressure loss in the fluid flowing through the valve.
In an optional embodiment, the multi-pipeline pressure flow coefficient testing device further comprises a branch gas pipe, wherein the gas inlet end of the branch gas pipe is connected with the main gas pipe, and the joint of the branch gas pipe and the main gas pipe is positioned at the rear end of the filter along the gas conveying direction; the air outlet end of the branch air delivery pipe is externally connected with air using equipment; a second pressure-stabilizing gas storage tank and a stop valve are sequentially arranged on the main gas transmission pipe along the gas transmission direction, and the second pressure-stabilizing gas storage tank is positioned at the rear end of the joint of the branch gas transmission pipe and the main gas transmission pipe along the gas transmission direction;
a preparation link: the air outlet ends of more than two groups of test air pipes are respectively in one-to-one corresponding sealing communication with the air inlets of more than two products to be tested, and the air outlets of the products to be tested are communicated with the atmosphere; firstly, closing a switch valve, a stop valve and a first electromagnetic valve, inflating a first pressure-stabilizing gas storage tank by a gas source through a one-way valve, opening the switch valve after a preset inflation time, regulating the pressure of the gas through a first pressure regulating valve, and filtering moisture through a filter; one part of the gas with the moisture filtered enters the branch gas pipe, and the other part of the gas enters the second pressure-stabilizing gas storage tank for gas storage;
and (3) testing: the gas outlets of all products to be tested are blocked, the stop valves are opened, then the first electromagnetic valves on all the test gas pipes are opened, gas in the second pressure-stabilizing gas storage tank is used for inflating the products to be tested respectively, in the test process, the pressure sensor is used for detecting the gas pressure of the products to be tested, the pressure sensor is used for sending detected pressure information to the central controller, and the central controller is used for controlling the opening degree of the second pressure regulating valve according to the pressure information fed back by the pressure sensor so that the test gas pipes can keep constant pressure; detecting the flow of a product to be detected through a flow sensor, and after a preset test time, when the actual flow change value in the test time reaches a preset flow change value prestored in a central controller, determining that the product to be detected is qualified, otherwise, determining that the product to be detected is unqualified;
and (3) an exhaust link: after the test is finished, the switch valve, the stop valve and the first electromagnetic valve are closed, and the gas outlets of all products to be tested are opened, so that gas in the test pipeline is emptied.
Compared with the prior art, the invention has the beneficial effects that:
the multi-pipeline pressure flow coefficient testing device comprises a main gas pipeline assembly and more than two groups of testing pipeline assemblies, in the preparation link, a gas source inflates gas into a first pressure stabilizing gas storage tank through a one-way valve to play a role in stabilizing pressure, after the preset inflation time, the gas is subjected to pressure regulation through a first pressure regulating valve to further ensure the stability of the gas pressure, and then the moisture is filtered through a filter to avoid the influence of the moisture on the testing result. In the testing link, the pressure sensor detects the air pressure of a product to be tested, the pressure sensor sends detected pressure information to the central controller, the central controller controls the opening of the second pressure regulating valve according to the pressure information fed back by the pressure sensor, so that the test air pipe maintains constant pressure, uniform-speed inflation can be realized in the process, the flow sensor is protected from exceeding the range, the flow of the product to be tested is detected through the flow sensor, after the preset testing time, when the actual flow change value in the testing time reaches the preset flow change value prestored in the central controller, the product to be tested is qualified, otherwise, the product to be tested is unqualified. Therefore, the invention can simultaneously test a plurality of products to be tested and has the advantages of good stability, good test accuracy and high test efficiency.
Drawings
FIG. 1 is a schematic view of a piping connection of a multi-pipe pressure flow coefficient test apparatus according to an embodiment;
FIG. 2 is another schematic view of a piping connection of the multi-pipe pressure flow coefficient testing apparatus of the embodiment;
FIG. 3 is a schematic structural diagram of a multi-channel pressure-flow coefficient test apparatus according to an embodiment;
fig. 4 is a perspective view of the on-off valve, the first pressure regulating valve, and the filter according to the embodiment.
In the figure: 110. a main gas delivery pipe; 111. a first hose; 112. a second hose; 113. a first rigid tube; 114. a third hose; 115. a fourth hose; 116. a second rigid tube; 117. a multi-way pipe joint; 120. a one-way valve; 130. a first pressure-stabilizing air storage tank; 140. an on-off valve; 150. a first pressure regulating valve; 151. a pressure gauge; 152. a pressure switch; 160. a filter; 170. a second pressure-stabilizing air storage tank; 180. a stop valve; 210. testing the air pipe; 211. a third rigid tube; 212. a fifth hose; 213. a fourth rigid tube; 220. a first solenoid valve; 230. a second pressure regulating valve; 240. a flow sensor; 250. a pressure sensor; 260. a second solenoid valve; 300. a branch gas pipe; 400. a product to be tested; 500. an air supply device; 600. and (7) mounting the structure.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict. Except as specifically noted, the materials and equipment used in this example are commercially available. Examples of embodiments are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. In the description of the present application, "a plurality" means two or more unless specifically stated otherwise.
In the description of the present application, it should be noted that unless otherwise specifically stated or limited, the terms "connected," "communicating," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a connection through an intervening medium, a connection between two elements, or an interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The terms "first," "second," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example (b):
referring to fig. 1-4, a multi-channel pressure-flow coefficient testing apparatus includes:
the main gas pipeline assembly comprises a main gas pipeline 110, a one-way valve 120, a first pressure-stabilizing gas storage tank 130, a switch valve 140, a first pressure regulating valve 150 and a filter 160 which are sequentially arranged on the main gas pipeline along the gas conveying direction, and the gas inlet end of the main gas pipeline is connected with a gas source;
two groups of test pipeline components, each test pipeline component comprises a test air pipe 210, and a first electromagnetic valve 220, a second pressure regulating valve 230, a flow sensor 240 and a pressure sensor 250 which are sequentially arranged on the test air pipe along the air conveying direction; the air inlet ends of the test air pipes of more than two groups of test pipeline assemblies are respectively connected with the air outlet end of the main air pipe, and each test air pipe is provided with an air outlet end used for being communicated with the product 400 to be tested.
A testing method of a multi-pipeline pressure flow coefficient testing device comprises the following steps:
a preparation step; the air outlet ends of more than two groups of test air pipes are respectively in one-to-one corresponding sealing communication with the air inlets of more than two products to be tested, and the air outlets of the products to be tested are communicated with the atmosphere; firstly, closing a switch valve and a first electromagnetic valve, inflating a first pressure-stabilizing gas storage tank by a gas source through a one-way valve, opening the switch valve after a preset inflation time, regulating the pressure of the gas through a first pressure regulating valve, and filtering moisture through a filter;
and (3) testing: the air outlets of all products to be tested are blocked, then the first electromagnetic valves on all the test air pipes are opened, the products to be tested are respectively inflated by the air with moisture filtered, in the test process, the air pressure of the products to be tested is detected by the pressure sensor, the pressure sensor sends the detected pressure information to the central controller, and the central controller controls the opening of the second pressure regulating valve according to the pressure information fed back by the pressure sensor, so that the test air pipes keep constant pressure; detecting the flow of a product to be detected through a flow sensor, and after a preset test time, when the actual flow change value in the test time reaches a preset flow change value prestored in a central controller, determining that the product to be detected is qualified, otherwise, determining that the product to be detected is unqualified;
and (3) an exhaust link: and after the test is finished, closing the switch valve and the first electromagnetic valve, and opening the gas outlets of all the products to be tested so as to empty the gas in the test pipeline.
The flow coefficient is the volume flow, or mass flow, i.e. the flow capacity, of the medium flowing through the valve, which is maintained at a constant pressure in the test conditions per unit time in the conduit. A larger value of the flow coefficient indicates a smaller pressure loss in the fluid flowing through the valve.
In the preferred embodiment of the invention, the filter further comprises a branch gas conveying pipe 300, wherein the gas inlet end of the branch gas conveying pipe is connected with the main gas conveying pipe, and the joint of the branch gas conveying pipe and the main gas conveying pipe is positioned at the rear end of the filter along the gas conveying direction; the air outlet end of the branch air delivery pipe is externally connected with an air using device. Specifically, the gas equipment comprises equipment such as a cylinder, and the design is that partial gas in the main gas conveying pipe is conveyed to the cylinder through the branch gas conveying pipe, so that the occupied space of the pipeline is saved.
In a preferred embodiment of the present invention, a second pressure-stabilizing gas tank 170 and a stop valve 180 are sequentially installed on the main gas pipe in the gas conveying direction, and the second pressure-stabilizing gas tank is located at the rear end of the connection between the branch gas pipe and the main gas pipe in the gas conveying direction. Guarantee the stability of atmospheric pressure through second steady voltage gas holder, when needs overhaul second steady voltage gas holder, only need close the stop valve can, have convenient operation's advantage.
In a preferred embodiment of the present invention, the first pressure regulating valve 150 is provided with a pressure gauge 151 and a pressure switch 152. When the pressure gauge indicates that the pressure is too high, the central controller controls the first pressure regulating valve 150 to regulate the air pressure. Meanwhile, when the air pressure exceeds a preset value, the pressure switch can be automatically switched off, and the protection effect is achieved.
In the preferred embodiment of the present invention, further comprises an air source device 500;
the main gas pipe 110 comprises a first hose 111, a second hose 112, a first hard pipe 113, a third hose 114, a fourth hose 115, a second hard pipe 116 and a multi-way pipe joint 117; the check valve is arranged on the first hose, and the air inlet end of the first hose is connected with the air outlet of the air source device; the air outlet end of the first hose is connected with the air inlet end of the multi-way pipe joint through a first pressure-stabilizing air storage tank, a second hose, a first hard pipe, a third hose, a second pressure-stabilizing air storage tank, a fourth hose and a second hard pipe in sequence; the switch valve, the first pressure regulating valve and the filter are arranged on the first hard pipe, and the stop valve is arranged on the second hard pipe;
the test air tube 210 comprises a third hard tube 211, a fifth soft tube 212 and a fourth hard tube 213; the air inlet end of the third hard tube is connected with one of the air outlet ends of the multi-way pipe joint, and the air outlet end of the third hard tube is connected with the air inlet end of the fourth hard tube through a fifth hose in sequence; the first electromagnetic valve, the second pressure regulating valve, the flow sensor and the pressure sensor are arranged on the third hard pipe.
Design like this, through setting up first hose, second hose, third hose, fourth hose connection first steady voltage gas holder and second steady voltage gas holder, be convenient for set up the great first steady voltage gas holder of volume and second steady voltage gas holder in the outside of organism. In addition, the third hard pipe and the fourth hard pipe are connected through the fifth hose, so that the third hard pipe and the fourth hard pipe can be separately arranged, the arrangement of pipelines is favorably reduced, and the space is reasonably utilized.
In the preferred embodiment of the present invention, the switch valve, the first pressure regulating valve, the second pressure regulating valve, and the flow sensor are all provided with mounting structures 600 for fixedly connecting with the external plate. The design has the advantages of convenient installation and small occupied space.
In the preferred embodiment of the present invention, the multi-way pipe joint is a three-way pipe with one inlet and two outlets, and the number of the test pipe assemblies is two.
In the preferred embodiment of the present invention, a second solenoid valve 260 is further disposed on the fourth hard tube. Design like this, when needs overhaul the test tube way, close the second solenoid valve can, have convenient operation's advantage.
Referring to fig. 2, the present embodiment further provides a testing method of a multi-pipeline pressure-flow coefficient testing apparatus, including the following steps:
a preparation link: the air outlet ends of more than two groups of test air pipes are respectively in one-to-one corresponding sealing communication with the air inlets of more than two products to be tested, and the air outlets of the products to be tested are communicated with the atmosphere; firstly, closing a switch valve, a stop valve and a first electromagnetic valve, inflating a first pressure-stabilizing gas storage tank by a gas source through a one-way valve, opening the switch valve after a preset inflation time, regulating the pressure of the gas through a first pressure regulating valve, and filtering moisture through a filter; one part of the gas with the moisture filtered enters the branch gas pipe, and the other part of the gas enters the second pressure-stabilizing gas storage tank for gas storage;
and (3) testing: the gas outlets of all products to be tested are blocked, the stop valves are opened, then the first electromagnetic valves on all the test gas pipes are opened, gas in the second pressure-stabilizing gas storage tank is used for inflating the products to be tested respectively, in the test process, the pressure sensor is used for detecting the gas pressure of the products to be tested, the pressure sensor is used for sending detected pressure information to the central controller, and the central controller is used for controlling the opening degree of the second pressure regulating valve according to the pressure information fed back by the pressure sensor so that the test gas pipes can keep constant pressure; detecting the flow of a product to be detected through a flow sensor, and after a preset test time, when the actual flow change value in the test time reaches a preset flow change value prestored in a central controller, determining that the product to be detected is qualified, otherwise, determining that the product to be detected is unqualified;
and (3) an exhaust link: after the test is finished, the switch valve, the stop valve and the first electromagnetic valve are closed, and the gas outlets of all products to be tested are opened, so that gas in the test pipeline is emptied.
Other examples are as follows:
the multi-way pipe joint is a four-way pipe with one inlet and three outlets, a five-way pipe with one inlet and four outlets or a six-way pipe with one inlet and five outlets or multi-way pipes of more output pipes, and the number of the test pipeline assemblies is three groups, four groups, five groups or more groups correspondingly. While only certain features and embodiments of the application have been illustrated and described, many modifications and changes may occur to those skilled in the art (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the scope and spirit of the invention in the claims.
Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention should not be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. A multi-pipe pressure flow coefficient testing device is characterized by comprising:
the main gas transmission pipeline assembly comprises a main gas transmission pipe, a one-way valve, a first pressure-stabilizing gas storage tank, a switch valve, a first pressure regulating valve and a filter, wherein the one-way valve, the first pressure-stabilizing gas storage tank, the switch valve, the first pressure regulating valve and the filter are sequentially arranged on the main gas transmission pipe along the gas transmission direction;
the device comprises more than two groups of test pipeline assemblies, wherein each test pipeline assembly comprises a test air pipe, and a first electromagnetic valve, a second pressure regulating valve, a flow sensor and a pressure sensor which are sequentially arranged on the test air pipe along the air conveying direction; the air inlet ends of the test air pipes of the test pipeline assembly are respectively connected with the air outlet end of the main air pipe, and each test air pipe is provided with an air outlet end used for being communicated with a product to be tested.
2. The multi-pipe pressure flow coefficient test device of claim 1, wherein: the filter also comprises a branch gas pipe, wherein the gas inlet end of the branch gas pipe is connected with the main gas pipe, and the joint of the branch gas pipe and the main gas pipe is positioned at the rear end of the filter along the gas conveying direction; the air outlet end of the branch air delivery pipe is externally connected with air using equipment.
3. The multi-pipe pressure flow coefficient test device of claim 2, wherein: and a second pressure stabilizing gas storage tank and a stop valve are sequentially arranged on the main gas pipe along the gas conveying direction, and the second pressure stabilizing gas storage tank is positioned at the rear end of the joint of the branch gas pipe and the main gas pipe along the gas conveying direction.
4. The multi-pipe pressure flow coefficient test device of claim 1, wherein: the first pressure regulating valve is provided with a pressure gauge and a pressure switch.
5. The multi-pipe pressure flow coefficient test device of claim 3, wherein: the device also comprises an air source device;
the main gas transmission pipe comprises a first hose, a second hose, a first hard pipe, a third hose, a fourth hose, a second hard pipe and a multi-way pipe joint; the check valve is arranged on the first hose, and the air inlet end of the first hose is connected with the air outlet of the air source device; the air outlet end of the first hose is connected with the air inlet end of the multi-way pipe joint through a first pressure-stabilizing air storage tank, a second hose, a first hard pipe, a third hose, a second pressure-stabilizing air storage tank, a fourth hose and a second hard pipe in sequence; the switch valve, the first pressure regulating valve and the filter are arranged on the first hard pipe, and the stop valve is arranged on the second hard pipe;
the test air pipe comprises a third hard pipe, a fifth hose and a fourth hard pipe; the air inlet end of the third hard tube is connected with one of the air outlet ends of the multi-way tube joint, and the air outlet end of the third hard tube is connected with the air inlet end of the fourth hard tube through a fifth hose in sequence; the first electromagnetic valve, the second pressure regulating valve, the flow sensor and the pressure sensor are arranged on the third hard pipe.
6. The multi-pipe pressure flow coefficient test device of claim 5, wherein: and the switching valve, the first pressure regulating valve, the second pressure regulating valve and the flow sensor are all provided with mounting structures fixedly connected with an external plate.
7. The multi-pipe pressure flow coefficient test device of claim 5, wherein: the multi-way pipe joint is a three-way pipe with one inlet and two outlets, a four-way pipe with one inlet and three outlets, a five-way pipe with one inlet and four outlets or a six-way pipe with one inlet and five outlets, and the number of the testing pipe assemblies is two, three, four or five.
8. The multi-pipe pressure flow coefficient test device of claim 5, wherein: and a second electromagnetic valve is also arranged on the fourth hard tube.
9. A method of testing the multi-pipe pressure flow coefficient testing apparatus of claim 1, comprising the steps of:
a preparation step; the air outlet ends of more than two groups of test air pipes are respectively in one-to-one corresponding sealing communication with the air inlets of more than two products to be tested, and the air outlets of the products to be tested are communicated with the atmosphere; firstly, closing a switch valve and a first electromagnetic valve, inflating a first pressure-stabilizing gas storage tank by a gas source through a one-way valve, opening the switch valve after a preset inflation time, regulating the pressure of the gas through a first pressure regulating valve, and filtering moisture through a filter;
and (3) testing: the air outlets of all products to be tested are blocked, then the first electromagnetic valves on all the test air pipes are opened, the products to be tested are respectively inflated by the gas after moisture is filtered, in the test process, the pressure of the products to be tested is detected by the pressure sensor, the pressure sensor sends the detected pressure information to the central controller, and the central controller controls the opening of the second pressure regulating valve according to the pressure information fed back by the pressure sensor, so that the test air pipes keep constant pressure; detecting the flow of a product to be detected through a flow sensor, and after a preset test time, when the actual flow change value in the test time reaches a preset flow change value prestored in a central controller, determining that the product to be detected is qualified, otherwise, determining that the product to be detected is unqualified;
and (3) an exhaust link: and after the test is finished, closing the switch valve and the first electromagnetic valve, and opening the gas outlets of all the products to be tested so as to empty the gas in the test pipeline.
10. The testing method of the multi-pipe pressure flow coefficient testing device according to claim 9, characterized in that: the multi-pipeline pressure flow coefficient testing device also comprises a branch gas pipe, the gas inlet end of the branch gas pipe is connected with the main gas pipe, and the joint of the branch gas pipe and the main gas pipe is positioned at the rear end of the filter along the gas conveying direction; the air outlet end of the branch air delivery pipe is externally connected with air using equipment; a second pressure-stabilizing gas storage tank and a stop valve are sequentially arranged on the main gas transmission pipe along the gas transmission direction, and the second pressure-stabilizing gas storage tank is positioned at the rear end of the joint of the branch gas transmission pipe and the main gas transmission pipe along the gas transmission direction;
a preparation link: the air outlet ends of more than two groups of test air pipes are respectively in one-to-one corresponding sealing communication with the air inlets of more than two products to be tested, and the air outlets of the products to be tested are communicated with the atmosphere; firstly, closing a switch valve, a stop valve and a first electromagnetic valve, inflating a first pressure-stabilizing gas storage tank by a gas source through a one-way valve, opening the switch valve after a preset inflation time, regulating the pressure of the gas through a first pressure regulating valve, and filtering moisture through a filter; one part of the gas with the moisture filtered enters the branch gas pipe, and the other part of the gas enters the second pressure-stabilizing gas storage tank for gas storage;
and (3) testing: the gas outlets of all products to be tested are blocked, the stop valves are opened, then the first electromagnetic valves on all the test gas pipes are opened, gas in the second pressure-stabilizing gas storage tank is used for inflating the products to be tested respectively, in the test process, the pressure sensor is used for detecting the gas pressure of the products to be tested, the pressure sensor is used for sending detected pressure information to the central controller, and the central controller is used for controlling the opening degree of the second pressure regulating valve according to the pressure information fed back by the pressure sensor, so that the test gas pipes keep constant pressure; detecting the flow of a product to be detected through a flow sensor, and after a preset test time, when the actual flow change value in the test time reaches a preset flow change value prestored in a central controller, determining that the product to be detected is qualified, otherwise, determining that the product to be detected is unqualified;
and (3) an exhaust link: after the test is finished, the switch valve, the stop valve and the first electromagnetic valve are closed, and the gas outlets of all products to be tested are opened, so that gas in the test pipeline is emptied.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112857694A (en) * | 2021-02-25 | 2021-05-28 | 广州科方生物技术股份有限公司 | Movable constant-pressure sealing detection system |
| CN113267220A (en) * | 2021-06-21 | 2021-08-17 | 浙江中工石化设备有限公司 | Pressure pipeline testing device |
| CN113740046A (en) * | 2021-09-08 | 2021-12-03 | 富奥汽车零部件股份有限公司 | Detection system and pipeline opening detection method |
| CN114993572A (en) * | 2022-06-20 | 2022-09-02 | 苏州浪潮智能科技有限公司 | Air tightness detection device, system and detection method |
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2020
- 2020-11-12 CN CN202011265427.6A patent/CN112284649A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112857694A (en) * | 2021-02-25 | 2021-05-28 | 广州科方生物技术股份有限公司 | Movable constant-pressure sealing detection system |
| CN113267220A (en) * | 2021-06-21 | 2021-08-17 | 浙江中工石化设备有限公司 | Pressure pipeline testing device |
| CN113267220B (en) * | 2021-06-21 | 2024-01-12 | 浙江中工石化设备有限公司 | Pressure pipeline testing device |
| CN113740046A (en) * | 2021-09-08 | 2021-12-03 | 富奥汽车零部件股份有限公司 | Detection system and pipeline opening detection method |
| CN114993572A (en) * | 2022-06-20 | 2022-09-02 | 苏州浪潮智能科技有限公司 | Air tightness detection device, system and detection method |
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