CN120176955A - A rotary valve testing device - Google Patents
A rotary valve testing device Download PDFInfo
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- CN120176955A CN120176955A CN202510657673.2A CN202510657673A CN120176955A CN 120176955 A CN120176955 A CN 120176955A CN 202510657673 A CN202510657673 A CN 202510657673A CN 120176955 A CN120176955 A CN 120176955A
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- G—PHYSICS
- 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
- G01M3/2876—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 valves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
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- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
本发明涉及一种旋转阀测试装置，包括计算机集成控制装置与支撑台，支撑台上架设有支架，支架的顶部安装有伸缩装置，伸缩装置的底端为伸缩端并同轴线安装有密封盖，位于密封盖下方的支撑台上安装有底座，底座为顶面开口的壳体结构，且底座的顶面开口位置同轴线安装有第一法兰盘，底座上通过进气管道连通有气源装置，进气管道上依次安装有第一气体流量计与压力传感器，第一气体流量计靠近气源装置设置，计算机集成控制装置分别与气源装置、第一气体流量计、压力传感器信号连接，本发明在对旋转阀的气密性进行测试时，所得出的测试结果与现有技术相比，并不是基于理想状态下的假设，从而可缩小测试结果与实际情况的偏差，以提高测试结果的准确性。
The present invention relates to a rotary valve testing device, comprising a computer integrated control device and a support platform, wherein a support is mounted on the support platform, a telescopic device is installed on the top of the support, the bottom end of the telescopic device is a telescopic end and a sealing cover is installed coaxially, a base is installed on the support platform below the sealing cover, the base is a shell structure with an opening on the top surface, and a first flange is installed coaxially at the top surface opening position of the base, an air source device is connected to the base through an air intake pipe, a first gas flow meter and a pressure sensor are installed on the air intake pipe in sequence, the first gas flow meter is arranged close to the air source device, and the computer integrated control device is respectively connected to the air source device, the first gas flow meter and the pressure sensor signals. When the present invention tests the air tightness of a rotary valve, the test result obtained is not based on assumptions under an ideal state compared with the prior art, thereby reducing the deviation between the test result and the actual situation to improve the accuracy of the test result.
Description
Technical Field
The invention belongs to the technical field of rotary valve testing, and particularly relates to a rotary valve testing device.
Background
At present, when testing whether an industrial valve leaks air, a mathematical model is established by using a simulation technology to simulate the air leakage characteristic of the rotary valve in the pneumatic conveying process, but by adopting the testing mode, the complexity and the variable encountered in the process of actually operating the rotary valve cannot be captured because of relying on the mathematical model, namely, the testing result of the testing mode is based on the assumption in an ideal state, so that the deviation between the testing result and the actual situation can be caused, and therefore, the defects and the shortcomings still exist in the prior art.
Disclosure of Invention
The present invention is directed to a rotary valve testing apparatus, which solves the above-mentioned problems.
In order to solve the problems, the invention adopts the following technical scheme:
The utility model provides a rotary valve testing arrangement, includes computer integrated control device and brace table, the brace table is erect the support, vertical telescopic device who distributes is installed at the top of support, telescopic device's bottom is flexible end and coaxial line installs sealed lid, installs the base on the brace table that is located sealed lid below, the base is top surface open-ended shell structure, and the top surface open position coaxial line of base installs first ring flange, has the air supply device through the admission line intercommunication on the base, install first gas flowmeter and pressure sensor on the admission line in proper order, first gas flowmeter is close to the air supply device setting, computer integrated control device respectively with air supply device, first gas flowmeter, pressure sensor signal connection.
Further, the base is movably connected with the supporting table in a sliding mode, a first connecting pipe is communicated with the base, and a first gas transmission hose is communicated between one end, away from the base, of the first connecting pipe and the gas inlet pipeline.
Further, it still includes the exhaust bucket of vertical distribution, the bottom surface opening setting of exhaust bucket, and the bottom surface opening position coaxial line of exhaust bucket installs the second ring flange, and the top intercommunication of exhaust bucket has the blast pipe, the intercommunication has the second gas flowmeter with computer integrated control device signal connection on the blast pipe.
Further, the top coaxial line intercommunication of exhaust bucket has the unloading jar, first ooff valve is installed to the bottom of unloading jar, the inverted T type pipe that first connecting tube set up for the level, inverted T type pipe's vertical pipe and base coaxial line set up, inverted T type pipe's horizontal pipe's wherein one end is linked together with first air hose, inverted T type pipe's horizontal pipe's the other end intercommunication has the delivery hose, the one end intercommunication that first connecting tube was kept away from to the delivery hose has the conveying pipeline that has the second ooff valve, the one end intercommunication that the delivery hose was kept away from to the conveying pipeline has the storage silo, and the intercommunication has the third gas flowmeter with computer integrated control device signal connection on the conveying pipeline.
Further, the two sides of the base are communicated with the transverse pipes of the inverted T-shaped pipe, the air injection device comprises an air injection pipe, two ends of the air injection pipe are respectively communicated with the base and the transverse pipes of the inverted T-shaped pipe, and the air injection pipe is provided with an automatic switch valve in signal connection with the computer integrated control device.
Further, a gas flow control unit is communicated with an air inlet pipeline between the pressure sensor and the first air conveying hose and is in signal connection with the computer integrated control device, the gas flow control unit comprises a second connecting pipe with two open ends, two ends of the second connecting pipe are communicated with the air inlet pipeline, a Laval nozzle is communicated between one end of the second connecting pipe and the air inlet pipeline, a safety valve, a contact pressure gauge and a pressure transmitter are further sequentially installed on the second connecting pipe, the pressure transmitter is arranged close to the Laval nozzle and is arranged close to the first air conveying hose, a third connecting pipe is further arranged on one side of the second connecting pipe, two ends of the third connecting pipe are respectively communicated with the second connecting pipes located on two sides of the contact pressure gauge, and a pneumatic valve positioner is installed on the third connecting pipe.
Further, the first flange plate is detachably and fixedly connected with the base, and the second flange plate is detachably and fixedly connected with the exhaust hopper.
Further, a pressure regulating device is communicated with an air inlet pipeline between the first gas flowmeter and the pressure sensor, the pressure regulating device is in signal connection with the computer integrated control device, the pressure regulating device comprises three branched pipes which are arranged side by side, two ends of each branched pipe are communicated with the air inlet pipeline, the three branched pipes are a first branched pipe, a second branched pipe and a third branched pipe respectively, a third switching valve is arranged on the first branched pipe, two fourth switching valves are arranged on the second branched pipe, a medium-pressure reducing valve is arranged on the second branched pipe between the two fourth switching valves, two fifth switching valves are arranged on the third branched pipe, and a low-pressure reducing valve is arranged on the third branched pipe between the two fifth switching valves.
Further, a temperature sensor is arranged on an air inlet pipeline between the pressure sensor and the first air conveying hose, and the temperature sensor is in signal connection with the computer integrated control device.
Further, the air source device comprises an air compressor, the air compressor is communicated with an air receiver through a second air conveying hose, one end, far away from the base, of the air inlet pipeline is communicated with the air receiver, and a filtering pressure reducing valve is installed at one end, close to the air receiver, of the air inlet pipeline.
By adopting the technical scheme, the invention has the beneficial effects that:
The invention can be used for installing the rotary valve on the base through the first flange plate arranged on the base, and can be used for installing the rotary valve on the base through the first flange plate arranged on the base, when the telescopic end of the telescopic device stretches, the sealing cover can be pressed on the flange plate arranged on the top of the rotary valve body to seal the top opening of the rotary valve, then after the air source device is started, air can be conveyed into the rotary valve through the air conveying pipeline and the base for a period of time, and the pressure sensor can be used for detecting the pressure in the air conveying pipeline in real time, so that the computer integrated control device can be used for judging whether the rotary valve is full of air, then when the rotary valve is full of air, the computer integrated control device can be used for stopping air supply, at this time, if the computer integrated control device collects the flow value of the first air flowmeter, the whole machine shell is free of the phenomenon is indicated, otherwise, when the air tightness of the whole machine shell is unqualified, the air leakage of the rotary valve in a static state can be tested, and the air leakage state can be further reduced, and the air leakage state can be directly tested, and the invention is an ideal air leakage state can be improved, and the air leakage state can be compared with the actual test result, and the air leakage state can be accurately tested, and the air leakage state can be improved, and the air leakage state is tested.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a portion of the apparatus of FIG. 1;
FIG. 3 is a second schematic diagram of the structure of the present invention;
FIG. 4 is a schematic view of a portion of the apparatus of FIG. 3;
FIG. 5 is a schematic diagram of a gas flow control unit according to the present invention;
FIG. 6 is a schematic diagram of a pressure regulating device according to the present invention;
FIG. 7 is a schematic view of a portion of the apparatus of the present invention;
FIG. 8 is a flow chart of the present invention for testing the air leakage of a rotary valve under load
Fig. 9 is a schematic diagram of a prior art rotary valve.
Reference numeral 1, a base; 2, a telescopic device; 3, an air source device; 31, an air compressor, 32, a second air delivery hose, 33, an air receiver, 34, a filtering and reducing valve, 4, a gas flow control unit, 41, a second connecting pipe, 42, a Laval nozzle, 43, a safety valve, 44, a contact pressure gauge, 45, a pressure transmitter, 46, a third connecting pipe, 47, a pneumatic valve positioner, 5, a pressure regulating device, 51, a first branch pipe, 52, a second branch pipe, 53, a third branch pipe, 54, a third switching valve, 55, a fourth switching valve, 56, a medium pressure reducing valve, 57, a fifth switching valve, 58, a low pressure reducing valve, 6, a gas injection device, 61, a gas injection pipe, 62, an automatic switching valve, 7, a supporting table, 8, a rotary valve, 81, a rotary valve body, 82, an end cover, 83, a rotary shaft, 84, a motor, 85, a flange plate, 9, an exhaust hopper, 10, a lower charging tank, 11, a computer integrated control device, 12, a bracket, 13, a first flange plate, 14, an air inlet pipeline, 15, a first gas flow meter, 16, a rail, 17, a low pressure reducing valve, 58, a rotary valve, 82, an end cap, 83, a rotary shaft, a rotary motor, a rotary flange, a 8, a flange, a first gas flow meter, a second rail, a 17, a second pressure sensor, a first gas flow meter, a rail, a 18, a second rail, a 18, a rotary pressure sensor, a 18, a first gas flow meter, a 18, a rotary pressure sensor, a rotary carrier, a 18, a rotary pressure valve, a 18, a rotary carrier, a valve a valve a.
Detailed Description
In order to make the objects, technical solutions and advantageous effects of the present invention more apparent, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 to 7, the present invention provides a rotary valve testing device, which can be used for testing whether the whole machine shell of the rotary valve 8 shown in fig. 9 leaks air or not, and can also test the air leakage at the shaft seal and the end face of the rotary valve 8, wherein the end face of the rotary valve 8 is the position where the end cover 82 is circumferentially connected with the rotary valve body 81, namely the position B shown in fig. 9, the shaft seal of the rotary valve 8 is the position where the rotating shaft 83 is circumferentially contacted with the end cover 82, namely the position a shown in fig. 9, and when the rotary valve 8 is used, the rotating shaft 83 is used for controlling the inside of the rotary valve 8 to continuously feed air, so that a gap exists between the contact position of the rotating shaft 83 and the end cover 82, and the shaft seal of the rotary valve 8 is the main air leakage position.
The intelligent integrated control system comprises a computer integrated control device 11 and a supporting table 7, wherein the computer integrated control device 11 comprises a host, a display screen and the like, can control starting and stopping of all electric elements and monitor and collect detection data of all electric elements in real time, can form a data report, can also input parameter values in the computer integrated control device 11, a support 12 is erected on the supporting table 7, a vertically distributed telescopic device 2 is arranged on the top of the support 12, the telescopic device 2 can be arranged as a jack, a hydraulic cylinder and the like, the bottom end of the telescopic device 2 is a telescopic end and is coaxially provided with a sealing cover, the outer diameter of the sealing cover is larger than the outer diameter of a flange 85 positioned on the top of a rotary valve body 81, a base 1 is arranged on the supporting table 7 positioned below the sealing cover, the base 1 is of a shell structure with an opening on the top surface, a first flange 13 is coaxially arranged at the opening position of the base 1, the first flange 13 is matched with a flange 85 positioned on the bottom of the rotary valve body 81, the base 1 is communicated with an air source device 3 through an air inlet pipeline 14, the air source device 3 is a power source of air, a first air flowmeter 15 and a pressure sensor 16 are sequentially arranged on the air inlet pipeline 14, the air flowmeter 15 and the pressure sensor 16 are coaxially arranged at the air source 14, the air source 15 is close to the first air flowmeter 15 and the air source device and the air source 3 is respectively connected with the air source pressure sensor and the real-time sensor 16, and the real-time signal can be respectively detected by the air source and the air source device.
Specifically, before the test, the first flange 13 installed on the base 1 can connect the flange 85 located at the bottom of the rotary valve body 81 with the first flange 13 through a bolt connection pair, so that the rotary valve 8 can be installed on the base 1, and a rubber sealing ring can be arranged at the connection position of the first flange 13 and the flange 85 to improve the tightness; when the expansion end of the expansion device 2 is expanded, the sealing cover can be pressed on the flange 85 positioned at the top of the rotary valve body 81 to seal the top opening of the rotary valve 8, then after the air source device 3 is started, air can be delivered into the rotary valve 8 through the air inlet pipeline 14 and the base 1 for a period of time, such as not less than five minutes, and the pressure in the air delivery channel can be detected in real time by the pressure sensor 16, so that the computer integrated control device 11 can be used for judging whether the rotary valve 8 is full of air, then when the rotary valve 8 is full of air, the computer integrated control device 11 can be used for stopping air supply of the air source device 3, at this time, if the computer integrated control device 11 is used for collecting the flow value of the first air flowmeter 15, the rotary valve 8 is in a static state, otherwise, the whole machine shell of the rotary valve 8 has no air leakage phenomenon, and the whole machine shell of the rotary valve 8 has air leakage phenomenon.
When the air tightness of the whole shell of the rotary valve 8 is disqualified, the end cover 82 of the rotary valve 8 to be tested can be sealed by utilizing a sealing film, and as the rotary valve 8 is in a static state, only one factor affecting the air leakage change exists, so that whether the air leakage exists at the shaft seal of the rotary valve 8 can be judged by collecting the air leakage value of the fluctuation on the first air flowmeter 15 through the computer integrated control device 11, and the air leakage data in unit time is recorded, wherein the air leakage value is the air leakage value at the shaft seal, then the sealing film at the end cover 82 is taken down, the rest operation is consistent with the air leakage test at the shaft seal, at the moment, the air leakage value at the end face is the total air leakage value, and in addition, the air leakage value at the shaft seal of the rotary valve 8 in the static state is subtracted from the air leakage value at the end face, at the moment, the air leakage data on the first air flowmeter 15 is the air leakage value at the end face, so that the air leakage of the rotary valve 8 can be tested, even if the rotary valve 8 is tested, the air leakage of the rotary valve 8 can be directly tested, the air leakage of the rotary valve 8 can be tested, the air tightness can be accurately compared with the actual test result of the rotary valve 8 in the test process, and the test result is not required to be reduced, and the actual test result is compared with the test result of the test 8, and the actual process 8, and the air tightness is not required to be produced in the test case.
Further, as shown in fig. 1 and 3, the base 1 and the supporting table 7 are slidably connected to form a movable base, specifically, the horizontal section of the supporting table 7 is rectangular, two rails 17 parallel to the length direction of the supporting table 7 are installed on the table surface of the supporting table 7, a carrying trolley 18 with a braking function is slidably connected between the two rails 17, namely, the carrying trolley 18 can fix a position on the supporting table 7 at any time, the base 1 is installed on the carrying trolley 18, the base 1 is communicated with a first connecting pipe 19, one end of the first connecting pipe 19 far away from the base 1 is communicated with an air inlet pipeline 14, the first air inlet hose 20 is telescopic, namely, the length can be changed at will, and by arranging the first air inlet hose 20, the movement of the air inlet pipeline 14 on the base 1 in the horizontal direction can be prevented, in addition, two ends of the first air inlet hose 20 are respectively communicated with the first connecting pipe 19 and the air inlet pipeline 14 through quick connectors, so that the first air inlet hose 20 can be conveniently dismounted and mounted on the first connecting pipe 19 and the air inlet pipeline 14, and meanwhile, the first connecting pipe 20 can be guaranteed to be conveniently dismounted and mounted on the base 1, and the air inlet pipeline 14 can be dismounted on the base 1, and the base 1 can be dismounted and mounted on the horizontal position of the rotary valve 1, and the rotary valve 1 can be dismounted on the base 1 in the horizontal position, and the position of the rotary valve 8 can be dismounted and the position when the base 1 is in the position and the rotary valve 1 is convenient.
Or the base 1 can be fixedly erected on the supporting table 7, two sliding grooves parallel to the length direction of the supporting table 7 are formed in the table surface of the supporting table 7, the support 12 can be a door-shaped frame, and sliding blocks which are in sliding connection with the sliding grooves are arranged on two sides of the bottom of the support 12 so that the support 12 is in sliding connection with the supporting table 7, so that when the rotary valve 8 is dismounted on the base 1, the rotary valve 8 can be dismounted conveniently by moving the telescopic device 2 and the sealing cover to be positioned right above the center of the rotary valve 8 through moving the position of the support 12, and when the rotary valve 8 is dismounted on the base 1, the support 12 and the base 1 are dislocated.
In addition, for the rotary valve 8 passing the air tightness test of the housing, after the bracket 12 is misplaced with the base 1, a hand can be inserted into the rotary valve 8 to rotate the rotary shaft 83 so as to detect whether the rotary shaft 83 can normally operate, then the motor 84 is started again to enable the rotary valve 8 to operate for a period of time, for example, more than 3 hours, and whether abnormal phenomena such as vibration, noise and the like occur in the rotary valve 8 during the period of time is observed so as to test the operation condition of the rotary valve 8.
Further, as shown in fig. 3, the invention further comprises an exhaust bucket 9 which is vertically distributed, wherein the bottom surface of the exhaust bucket 9 is provided with an opening, the opening of the bottom surface of the exhaust bucket 9 is coaxially provided with a second flange 21, the second flange 21 is matched with a flange 85 positioned at the top of a rotary valve body 81, the top of the exhaust bucket 9 is communicated with an exhaust pipe 22, the exhaust pipe 22 is communicated with a second gas flowmeter 23 which is in signal connection with a computer integrated control device 11, the second gas flowmeter 23 can detect the flow of gas in the exhaust pipe 22 in real time, and particularly, when the operation condition of the rotary valve 8 is not abnormal, the second flange 21 is connected with the flange 85 positioned at the top of the rotary valve body 81 through a bolt connection pair, so that the exhaust bucket 9 can be installed on the rotary valve 8, and a rubber sealing ring can be arranged at the connection position of the second flange 21 and the flange 85, so as to improve the tightness, and the air leakage of the rotary valve 8 in an empty state can be tested by arranging the exhaust bucket 9, the exhaust pipe 22 and the second gas flowmeter 23.
Specifically, when the air leakage test is performed on the shaft seal of the rotary valve 8 in the idle state, the sealing film is required to be sealed on the end cover 82, and because the rotating shaft 83 of the rotary valve 8 always rotates, when the air source device 3 continuously intakes air, the air filled in the rotary valve 8 is discharged through the connected pipeline, namely the exhaust pipe 22, then after the test system operates for a period of time, the computer integrated control device 11 can collect the value of the discharged air in the exhaust pipe 22 in the unit time recorded on the second air flowmeter 23 in real time, and then the difference value of the air inflow in the unit time recorded on the first air flowmeter 15 can reflect the actual value of the air leakage of the rotary valve 8 in the idle state, and the air leakage test at the end face of the rotary valve 8 is consistent with the air leakage test at the shaft seal in the idle state, but the sealing film for sealing the end cover 82 is required to be removed, at this time, the change of the air leakage data recorded on the second air flowmeter 23 is the total air leakage value, and the air leakage value at the end face is the air leakage value of the air leakage value at the position of the rotary valve 8 in the idle state.
Further, as shown in fig. 3 and 6, the top of the exhaust hopper 9 is coaxially connected with the blanking tank 10, the bottom of the blanking tank 10 is provided with the first switch valve 24, the first switch valve 24 is a pneumatic butterfly valve and is in signal connection with the computer integrated control device 11, when in use, the first switch valve 24 can be used for opening and closing a blanking channel of the blanking tank 10, and the computer integrated control device 11 can control the first switch valve 24, so that the first switch valve 24 can be opened in real time according to test requirements, then materials can automatically fall into the rotary valve 8 through the exhaust hopper 9 until the rotary valve 8 is filled with a certain amount of materials, for example, when the rotary valve 8 is filled with the materials, the first switch valve 24 is closed, the first connecting pipe 19 is an inverted-T-shaped pipe which is horizontally arranged, the vertical pipe of the inverted-T-shaped pipe is coaxially arranged with the base 1, specifically, the base 1 can be provided with a conical structure with a wide top and a narrow bottom, and the vertical pipe of the inverted-T-shaped pipe is communicated with the base 1 after passing through the bearing trolley 18 through a through hole formed in the bearing trolley 18.
One end of the transverse pipe of the inverted T-shaped pipe is communicated with the first air conveying hose 20, the other end of the transverse pipe of the inverted T-shaped pipe is communicated with the material conveying hose 25, the material conveying hose 25 is telescopic, one end of the material conveying hose 25 far away from the first connecting pipe 19 is communicated with a material conveying pipe 27 with a second switching valve 26, the second switching valve 26 is used for opening and closing a material conveying channel in the material conveying pipe 27, the material conveying hose 25 is arranged to prevent the material conveying pipe 27 from obstructing the movement of the base 1 in the horizontal direction, and in addition, two ends of the material conveying hose 25 are respectively communicated with the first connecting pipe 19 and the material conveying pipe 27 through quick-inserting connectors, so that the material conveying hose 25 can be conveniently assembled and disassembled between the first connecting pipe 19 and the material conveying pipe 27, and the air tightness of the material conveying hose 25, the first connecting pipe 19 and the material conveying pipe 27 at the communicating position can be ensured.
In addition, one end of the material conveying pipe 27 far away from the material conveying hose 25 is communicated with a storage bin 28, and a third gas flowmeter 29 in signal connection with the computer integrated control device 11 is communicated with the material conveying pipe 27, wherein the third gas flowmeter 29 can detect the flow of gas in the material conveying pipe 27 in real time, and at the moment, when the air leakage of the rotary valve 8 in an empty state is qualified, the air leakage of the rotary valve 8 in a loaded state can be tested.
Specifically, the first switch valve 24 is opened until a certain amount of material is contained in the rotary valve 8, and then the first switch valve 24 is closed, so that the rotary valve 8 is in a load state, and in the load state, when the air leakage test is performed at the shaft seal of the rotary valve 8, the sealing film is required to be sealed at the end cover 82; when the rotating shaft 83 is driven by the motor 84 to operate, materials can fall into the first connecting pipe 19, then under the action of the air source device 3, the materials can enter the storage bin 28 through the conveying pipe 27 to realize the repeated etching of the actual working condition of conveying the materials to the rotary valve 8, after the test system operates for a period of time to be stable, the computer integrated control device 11 can collect the value of the gas discharged from the conveying pipe 27 in the unit time of the third gas flowmeter 29, the computer integrated control device 11 can collect the value of the gas discharged from the exhaust pipe 22 in the unit time of the second gas flowmeter 23, then the difference value between the value of the third gas flowmeter 29 and the value of the gas inflow in the unit time recorded on the first gas flowmeter 15 can reflect the actual value of the gas leakage of the rotary valve 8 at the shaft seal under the load state, the gas leakage test at the end face is consistent with the gas leakage test at the shaft seal position under the load state, but the sealing film for sealing the position 82 is required to be removed, the total gas leakage at the moment, and the total gas leakage recorded by the second gas flowmeter 23 and the third gas flowmeter 29 is the value of the total value of the invention, namely the value of the gas leakage at the load state at the position of the rotary valve 8 is subtracted.
In addition, the computer integrated control device 11 is provided with a PWM generator, the interval time for collecting data by the computer integrated control device 11 can be set to be 100 milliseconds, namely, the computer integrated control device 11 outputs a data result every 100 milliseconds, and then can average value to ensure the high efficiency and accuracy of data collection, when in use, as shown in figure 8, the PWM generator of the computer integrated control device 11 can be connected with a control box on the rotary valve 8 through a signal wire, then a test program in the computer integrated control device 11 sends a test instruction, the PWM generator receives the instruction, then the computer integrated control device 11 controls and adjusts the duty ratio parameter of the PWM generator, the rotating speed of the motor 84 on the rotary valve 8 is controlled by the duty ratio and smooth start and stop are realized, the discharging amount of the rotary valve 8 under the load state can be adjusted by changing the rotating speed frequency of the motor 84, the computer integrated control device 11 collects a flow value signal every 100ms and calculates the difference value to be the air leakage amount, finally the air leakage value of the rotary valve 8 under different discharging amount is output, in addition, the air leakage value of the rotary valve 8 can also be automatically adjusted in real time through the automatic adjustment of the rotating direction of the rotating shaft 83 on the rotary valve 8 on the computer integrated control device 11.
Further, as shown in fig. 4, the two sides of the base 1 and the transverse tube of the inverted T-shaped tube are both communicated with each other, the air injection device 6 comprises an air injection tube 61, two ends of the air injection tube 61 are respectively communicated with the base 1 and the transverse tube of the inverted T-shaped tube, the air injection tube 61 is provided with an automatic switching valve 62 which is in signal connection with the computer integrated control device 11, the automatic switching valve 62 can be used for automatically opening and closing an air injection channel in the air injection tube 61, and particularly, when the air injection device is used, the computer integrated control device 11 can control the automatic switching valve 62 to start and stop at intervals, so that under the action of the air source device 3, air can be injected into the base 1 at intervals to generate vibration with frequency, thereby being convenient for discharging viscous materials attached to the base 1, avoiding the phenomenon of tube blockage, and being suitable for discharging materials with different characteristics.
In the load state, when the air leakage of the rotary valve 8 is tested, the problems that the actual blanking condition of the rotary valve 8 is required to be considered, namely, the blanking difficulty is caused when the air leakage is larger than a certain air flow, and the like are solved, so that the measured air leakage value is not consistent with the actual air leakage, as shown in fig. 1,3 and 5, the air inlet pipeline 14 positioned between the pressure sensor 16 and the first air delivery hose 20 is communicated with the air flow control unit 4, the air flow control unit 4 is in signal connection with the computer integrated control device 11, the air flow control unit 4 can adjust the air flow, the air flow control unit 4 comprises a second connecting pipe 41 with two open ends, two ends of the second connecting pipe 41 are communicated with the air inlet pipeline 14, a Laval nozzle 42 is communicated between one end of the second connecting pipe 41 and the air inlet pipeline 14, a safety valve 43, a contact pressure gauge 44 and a pressure transmitter 45 are sequentially arranged on the second connecting pipe 41, the pressure transmitter 45 is arranged close to the Laval nozzle 42, one side of the second connecting pipe 41 is also provided with a third connecting pipe 46, the third connecting pipe 46 is in signal connection with the air inlet pipeline 44 and the air pressure transmitter 45, the two ends of the third connecting pipe 46 are in signal connection with the pneumatic valve positioning device 47, and the pneumatic positioning device 47 are respectively, and the pneumatic positioning device is in signal connection with the pneumatic device 47I is arranged on the two sides of the pneumatic device, and the pneumatic device is in signal connection with the pneumatic device 47.
Specifically, when in use, the electric signal can be converted into the pneumatic signal through the pneumatic valve positioner 47, and the pneumatic valve positioner 47 can automatically adjust the taper-shaped flow cross section in the Laval nozzle 42 through the computer integrated control device 11 in the test process, so as to adjust the air flow stably output into the rotary valve 8 to reach a proper value, ensure that the material can freely fall, effectively eliminate experimental errors caused by air flow fluctuation generated in the feeding process of the rotary valve 8, record the pressure value displayed on the air flow control unit 4 at the moment through the computer integrated control device 11, adjust the pressure to the recorded value in the subsequent test, and further balance the leaked air flow through the air flow control unit 4 in the load state, so as to increase the air flow, transport the material into the storage bin 28 and prevent the blocking of the pipe.
Further, the first flange 13 is detachably and fixedly connected with the base 1, specifically, the inner diameter of the opening at the top surface of the base 1 is not larger than the inner diameter of the flange 85 on the rotary valve 8 with the minimum specification, the inner diameter of the first flange 13 is matched with the inner diameter of the opening at the top surface of the base 1, and the first flange 13 is connected with the base 1 through countersunk bolts, so that the first flange 13 can be conveniently dismounted on the base 1, and meanwhile, the first flange 13 with different outer diameters can be conveniently replaced, so that the rotary valve 8 with different specifications is suitable for being mounted on the base 1, thereby being convenient for testing whether the whole machine shell of the rotary valve 8 with different specifications has an air leakage phenomenon and being convenient for testing the air leakage of the rotary valve 8 with different specifications in a static state, secondly, the second flange 21 is detachably and fixedly connected with the exhaust hopper 9, and the inner diameter of the second flange 21 is matched with the inner diameter of the opening at the bottom surface of the exhaust hopper 9 is connected with the exhaust hopper 9 through countersunk bolts, so that the second flange 21 can be conveniently dismounted on the exhaust hopper 9, and simultaneously, the second flange 21 can be conveniently dismounted on the rotary valve 9, and simultaneously, the rotary valve 8 with different specifications can be conveniently replaced, and the rotary valve 8 can be conveniently mounted on the rotary valve 8 with different specifications under different specifications, and the different specifications can be conveniently and different types of air leakage states under different specifications, and the required conditions, and the required data can be conveniently and conveniently tested under different conditions and different conditions.
At present, under different application scenes, the working pressure range of the rotary valve 8 is different, and according to relevant regulations in the technical condition of JB/T11057-2023 rotary valve, the working pressure range of the rotary valve 8 is from-0.05 MPa to +0.60 MPa, namely the airtight performance of the rotary valve 8 can be divided into a high-pressure sealing type, a medium-pressure sealing type and a low-pressure sealing type according to different working condition pressures, therefore, as shown in fig. 1,3 and 7, a pressure regulating device 5 is communicated with a gas inlet pipeline 14 between a first gas flowmeter 15 and a pressure sensor 16, the pressure regulating device 5 is in signal connection with a computer integrated control device 11, the pressure regulating device 5 comprises three branched pipes which are arranged side by side, both ends of each branched pipe are communicated with the gas inlet pipeline 14, the three branched pipes are respectively a first branched pipe 51, a second branched pipe 52 and a third branched pipe 53, a third switching valve 54 is arranged on the first branched pipe 51, the third switching valve 54 is a pneumatic valve, and the third switching valve 54 can be used for opening and closing a pneumatic channel in the first branched pipe 51, and when the third switching valve 54 is opened, and the valve is used for meeting the requirements of high-pressure requirements of the high-pressure MPa, and the sealing requirements of the rotary valve is used for testing the valve is 20.45.
Secondly, two fourth switch valves 55 are arranged on the second branch pipe 52, the fourth switch valves 55 are pneumatic valves and can be used for opening and closing a gas transmission channel in the second branch pipe 52, and a medium-pressure reducing valve 56 is arranged on the second branch pipe 52 between the two fourth switch valves 55, when the fourth switch valves 55 are opened in use, the working conditions of working pressure of 0.1-0.20 MPa can be met, and the medium-pressure sealing type rotary valve testing requirements can be met; finally, the third branch pipe 53 is provided with two fifth switch valves 57, the fifth switch valves 57 are pneumatic valves and can be used for opening and closing a gas transmission channel in the third branch pipe 53, the third branch pipe 53 between the two fifth switch valves 57 is provided with a low-pressure reducing valve 58, when the fifth switch valves 57 are opened in use, the valve can be suitable for working conditions with working pressure of-0.05 to 0.1MPa and meet the test requirement of the low-pressure sealed rotary valve, and various valves of the pressure regulating device 5 are respectively connected with the computer integrated control device 11 in a signal mode, so that when the valve is used, the pressure value of a gas leakage test can be set in the computer integrated control device 11 according to the pressure requirement, and then the corresponding branch pipelines of the third switch valve 54, the fourth switch valve 55 and the fifth switch valve 57 can be respectively and accurately controlled through the computer integrated control device 11, so that the gas tightness of the rotary valve 8 can be tested in different working pressure ranges.
Further, as shown in fig. 1 and 3, the air inlet pipe 14 between the pressure sensor 16 and the first air delivery hose 20 is provided with a temperature sensor 30, the temperature sensor 30 is in signal connection with the computer integrated control device 11, when the rotary valve 8 is in a static state, an idle state and a load state, the temperature sensor 30 can detect the air temperature value in the air delivery channel in real time, and then, in combination with the pressure value in the air delivery channel detected by the pressure sensor 16 and the air leakage of the rotary valve 8 under the test working condition, the following formula can be set in the computer integrated control device 11 in advance:
In the above formula, 101.325 kpa=1 standard atmospheric pressure, 273.15 ℃ =0 ℃ and the absolute zero degree is taken as the temperature of the calculation starting point, the actual atmospheric pressure is the atmospheric pressure value of the environment where the invention is located, and the atmospheric pressure value can be input into the computer integrated control device 11 after being measured by an external barometer, so that the test result of the air leakage of the rotary valve 8 under the test working condition can be converted into the corresponding value under the standard working condition, and the standard working condition is the condition of the temperature of 0 ℃ and the pressure of 101.325Kpa in the physical and chemical conditions, thereby being convenient for judging whether the air tightness of the rotary valve 8 is qualified.
The air source device 3 is specifically arranged in such a way that, as shown in fig. 1 and 3, the air source device 3 comprises an air compressor 31, a blower is arranged in the air compressor 31 and is in signal connection with a computer integrated control device 11, the air compressor 31 is communicated with an air receiver 33 through a second air delivery hose 32, the second air delivery hose 32 is communicated with the bottom of the air receiver 33, one end of an air inlet pipe 14 far away from the base 1 is communicated with the top of the air receiver, a filter pressure reducing valve 34 is arranged at one end of the air inlet pipe 14 close to the air receiver 33, specifically, during use, compressed air generated in the air compressor 31 can be conveyed into the air receiver 33 through the second air delivery hose 32 and then stably pressurized by the filter pressure reducing valve 34 and then flows into the air inlet pipe 14, and the air receiver 33 can be used as a temporary storage to meet the peak requirement of a test system, meanwhile, the air receiver 33 can be condensed in the compression process, the content of the air receiver 33 can be further reduced, the water content in the test system can be further reduced, the filter pressure can be stably reduced by the filter pressure reducing valve 34, and the water content in the test system can be stably discharged through the filter pressure reducing valve 34, and the filter pressure can be stably maintained, and the filter pressure can be stably reduced, and the service and the air can be stably discharged through the filter pressure reducing valve can be stably through the filter pressure reducing valve.
The application process of the invention is as follows:
Before testing, the rotary valve 8 can be installed on the base 1 by using the first flange 13;
step two, stretching the telescopic end of the telescopic device 2 to enable the sealing cover to seal the top opening of the rotary valve 8;
starting the air source device 3 and continuously delivering air for a period of time, judging whether the rotary valve 8 is full of air or not through the pressure sensor 16 and the computer integrated control device 11, stopping air supply of the air source device 3 through the computer integrated control device 11 when the rotary valve 8 is full of air, and continuing to perform the step five if the computer integrated control device 11 acquires that the flow value of the first air flowmeter 15 is unchanged, indicating that the rotary valve 8 is in a static state, and continuing to perform the step four if the whole machine shell is free of air leakage, otherwise, indicating that the rotary valve 8 is full of air leakage;
When the air tightness of the whole shell of the rotary valve 8 is unqualified, sealing the end cover 82 of the rotary valve 8 to be tested by using a sealing film, collecting the fluctuation air quantity value on the first air flowmeter 15 by using the computer integrated control device 11, judging whether the shaft seal of the rotary valve 8 leaks air or not, and recording the air leakage data in unit time, wherein the air leakage value is the air leakage value at the shaft seal;
Step five, for the rotary valve 8 passing through the air tightness test of the shell, after the bracket 12 is misplaced with the base 1, a hand can be inserted into the rotary valve 8 to rotate the rotary shaft 83 so as to detect whether the rotary shaft 83 can normally operate, then the motor 84 is started again to enable the rotary valve 8 to operate for a period of time, and then abnormal phenomena such as vibration, noise and the like of the rotary valve 8 are observed to appear in the period of time so as to test the operation condition of the rotary valve 8, and when the operation condition of the rotary valve 8 is abnormal, the test procedure is ended;
Step six, when the running condition of the rotary valve 8 is not abnormal, the exhaust hopper 9 can be arranged on the rotary valve 8, then the air leakage of the rotary valve 8 in an empty state can be tested, at the moment, when the air leakage test is carried out on the shaft seal of the rotary valve 8, the sealing film is also required to be sealed on the end cover 82, then after the running of the test system tends to be stable for a period of time, the computer integrated control device 11 can collect the value of the exhaust gas in the exhaust pipe 22 in unit time, recorded in real time, on the second gas flowmeter 23, then the real value of the air leakage at the shaft seal can be reflected by the difference value of the air inflow in unit time recorded on the first gas flowmeter 15, and the air leakage test at the end face of the rotary valve 8 in an empty state is consistent with the air leakage test at the shaft seal, but the sealing film for sealing the end cover 82 is required to be removed, at the moment, the change of the air leakage data recorded on the second gas flowmeter 23 is the total air leakage value, the air leakage value at the end face is subtracted by the air leakage value at the shaft seal, and when the air leakage of the rotary valve 8 in the empty state is unqualified, the test program is ended;
And seventhly, when the air leakage of the rotary valve 8 in an empty state is qualified, the first switching valve 24 can be opened until a certain amount of materials are contained in the rotary valve 8, the first switching valve 24 is closed, the rotary valve 8 is in a loaded state, then the air leakage of the rotary valve 8 in the loaded state can be tested, at the moment, when the air leakage test is carried out on the shaft seal of the rotary valve 8, sealing films are required to be sealed on the end cover 82, after the test system is operated for a period of time to be stable, the computer integrated control device 11 can collect the value of the air discharged by the conveying pipe 27 in a unit time on the third air flow meter 29, meanwhile, the computer integrated control device 11 collects the value of the air discharged by the exhaust pipe 22 in a unit time on the second air flow meter 23, then the difference between the third air flow meter 29 and the second air flow meter 23 in the unit time can be reflected in the real value of the air leakage of the shaft seal at the position when the air leakage test is carried out on the shaft seal of the rotary valve 8, and the total air leakage test program is finished when the air leakage test is carried out on the end cover 82, and the total air leakage test program is finished when the air leakage test is finished on the end cover 82.
In the third, fourth, sixth and seventh steps, the corresponding branch pipeline of the pressure regulating device 5 can be automatically selected and switched by the computer integrated control device 11, in the seventh step, the air flow stably output to the rotary valve 8 can be adjusted to reach a proper value by the air flow control unit 4, the air injection device 6 can be used for injecting air to facilitate material blanking, the rotating speed and the rotating direction of the rotating shaft 83 can be adjusted by the computer integrated control device 11, and in the fourth, sixth and seventh steps, the computer integrated control device 11 acquires the flow value signal every 100ms and calculates the difference value to output as the air leakage.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which are all within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents.
Claims (10)
1. A rotary valve testing device comprises a computer integrated control device and a supporting table and is characterized in that a support is erected on the supporting table, a vertically distributed telescopic device is installed at the top of the support, a sealing cover is installed at the bottom end of the telescopic device in a coaxial line mode, a base is installed on the supporting table below the sealing cover, the base is of a shell structure with an open top surface, a first flange is installed at the position of the open top surface of the base in a coaxial line mode, an air source device is communicated on the base through an air inlet pipeline, a first air flowmeter and a pressure sensor are sequentially installed on the air inlet pipeline, the first air flowmeter is arranged close to the air source device, and the computer integrated control device is connected with the air source device, the first air flowmeter and the pressure sensor in a signal mode.
2. A rotary valve testing device according to claim 1, wherein the base is slidably connected with the supporting table to form a movable base, a first connecting pipe is communicated with the base, and a first air transmission hose is communicated between one end of the first connecting pipe far away from the base and the air inlet pipeline.
3. A rotary valve testing device according to claim 2 further comprising a vertically distributed exhaust hopper, wherein the bottom surface of the exhaust hopper is provided with an opening, a second flange is coaxially arranged at the position of the opening of the bottom surface of the exhaust hopper, the top of the exhaust hopper is communicated with an exhaust pipe, and a second gas flowmeter in signal connection with the computer integrated control device is communicated with the exhaust pipe.
4. A rotary valve testing device is characterized in that the top of an exhaust hopper is coaxially communicated with a blanking tank, a first switch valve is arranged at the bottom of the blanking tank, a first connecting pipe is an inverted T-shaped pipe which is horizontally arranged, a vertical pipe of the inverted T-shaped pipe is coaxially arranged with a base, one end of a transverse pipe of the inverted T-shaped pipe is communicated with a first air hose, the other end of the transverse pipe of the inverted T-shaped pipe is communicated with a material conveying hose, one end of the material conveying hose, far away from the first connecting pipe, is communicated with a material conveying pipe with a second switch valve, one end of the material conveying pipe, far away from the material conveying hose, is communicated with a storage bin, and a third air flowmeter in signal connection with a computer integrated control device is communicated on the material conveying pipe.
5. The rotary valve testing device of claim 4, wherein the air injection device is communicated between two sides of the base and the transverse pipes of the inverted T-shaped pipe, the air injection device comprises an air injection pipe, two ends of the air injection pipe are respectively communicated with the base and the transverse pipes of the inverted T-shaped pipe, and the air injection pipe is provided with an automatic switch valve which is in signal connection with the computer integrated control device.
6. A rotary valve testing device according to claim 4 is characterized in that a gas flow control unit is communicated with an air inlet pipeline between a pressure sensor and a first gas transmission hose, the gas flow control unit is in signal connection with a computer integrated control device, the gas flow control unit comprises a second connecting pipe with two open ends, two ends of the second connecting pipe are communicated with the air inlet pipeline, a Laval nozzle is communicated between one end of the second connecting pipe and the air inlet pipeline, a safety valve, a contact pressure gauge and a pressure transmitter are sequentially installed on the second connecting pipe, the pressure transmitter is arranged close to the Laval nozzle, the Laval nozzle is arranged close to the first gas transmission hose, a third connecting pipe is further arranged on one side of the second connecting pipe, two ends of the third connecting pipe are respectively communicated with the second connecting pipes on two sides of the contact pressure gauge, and a pneumatic valve positioner is installed on the third connecting pipe.
7. A rotary valve testing apparatus according to claim 1, 3 or 4, wherein the first flange is detachably and fixedly connected to the base, and the second flange is detachably and fixedly connected to the exhaust hopper.
8. A rotary valve testing device according to claim 1, 3 or 4, wherein a pressure regulating device is communicated with an air inlet pipeline between a first gas flowmeter and a pressure sensor, the pressure regulating device is in signal connection with a computer integrated control device, the pressure regulating device comprises three branched pipes which are arranged side by side, two ends of each branched pipe are communicated with the air inlet pipeline, the three branched pipes are a first branched pipe, a second branched pipe and a third branched pipe respectively, a third switching valve is arranged on the first branched pipe, two fourth switching valves are arranged on the second branched pipe, a medium-pressure reducing valve is arranged on the second branched pipe between the two fourth switching valves, two fifth switching valves are arranged on the third branched pipe, and a low-pressure reducing valve is arranged on the third branched pipe between the two fifth switching valves.
9. A rotary valve testing apparatus according to claim 1,3 or 4, wherein a temperature sensor is mounted on the air inlet conduit between the pressure sensor and the first air delivery hose, said temperature sensor being in signal communication with the computer integrated control device.
10. A rotary valve testing device as set forth in claim 1, wherein the air source device comprises an air compressor, the air compressor is communicated with an air receiver through a second air delivery hose, one end of the air inlet pipeline far away from the base is communicated with the air receiver, and a filtering pressure reducing valve is installed at one end of the air inlet pipeline close to the air receiver.
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