CN111829731A - Test device and method for verifying sealing performance of flange connection - Google Patents
Test device and method for verifying sealing performance of flange connection Download PDFInfo
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- CN111829731A CN111829731A CN202010716159.9A CN202010716159A CN111829731A CN 111829731 A CN111829731 A CN 111829731A CN 202010716159 A CN202010716159 A CN 202010716159A CN 111829731 A CN111829731 A CN 111829731A
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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
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Abstract
The invention discloses a test device and a verification method for verifying the sealing performance of flange connection. Wherein, the test device includes: the first flange and the second flange are in butt joint; the pressing device applies pressing force towards the butt joint of the two flanges; the pressurizing device is internally provided with test fluid, and the test fluid completely wraps the butt joint of the two flanges and forms test pressure at the butt joint; and the measuring device is used for measuring the test fluid which leaks inwards from the butt joint of the two flanges. The verification method comprises the following steps: butting the two flanges; applying pressing force towards the butt joint of the two flanges through a pressing device; forming a test pressure at the butt joint of the two flanges through test fluid in the pressurizing device; measuring test fluid leaking inwards from the butt joint of the two flanges by a measuring device; and obtaining the leakage rate of the butt joint of the two flanges. According to the technical scheme, the stress condition of the flange connection under the actual working condition is simulated, so that the measurement of the sealing performance of the flange connection is more accurate.
Description
Technical Field
The invention relates to the field of sealing performance tests, in particular to a test device and a test method for verifying the sealing performance of flange connection.
Background
The flange is important equipment in mechanical connection, and in the prior art, the sealing performance detection equipment for flange connection has a complex structure and cannot effectively measure the sealing performance of the flange connection under actual working conditions.
Disclosure of Invention
In view of the above, the present invention has been made in order to provide a test apparatus and a verification method for verifying the sealing performance of a flange connection that overcome or at least partially solve the above problems.
To achieve the above object, according to one aspect of the present invention, there is provided a test apparatus for verifying sealing performance of a flange connection, including: the first flange is butted with the second flange. And the pressing device applies pressing force towards the butt joint of the first flange and the second flange. And the pressurizing device is internally provided with test fluid, and the test fluid completely wraps the butt joint of the first flange and the second flange and forms test pressure at the butt joint. And the measuring device is used for measuring the test fluid which leaks inwards from the butt joint of the first flange and the second flange.
Further, the pressing force and/or the test pressure are adjustable.
Further, the test device further comprises: and the collecting device is positioned below the first flange and the second flange and is used for collecting the test fluid which leaks inwards from the butt joint of the first flange and the second flange.
Further, the test device further comprises: and the collecting device is positioned below the first flange and the second flange and is used for collecting the test fluid which leaks inwards from the butt joint of the first flange and the second flange.
Further, the collecting device comprises a first cylinder, a second flange is arranged below the first flange, the first cylinder is connected with the second flange in a sealing mode, the bottom of the first cylinder is provided with an opening and at least one guide inclined plane, and the opening corresponds to the lowest position of the guide inclined plane.
Further, the guide slope extends along the circumference of the first cylinder for one circle to form a funnel shape.
Further, the collecting device further comprises a collecting body which is communicated with the opening of the first cylinder.
Further, the test device further comprises: the second cylinder body is provided with a second flange below the first flange, the bottom of the second cylinder body is hermetically connected with the first flange, and the top of the second cylinder body is sealed.
Further, the experimental pressure is adjustable, and pressure device includes: the accommodating box body at least wraps the butt joint of the first flange and the second flange. The transfer and regulation device transfers the test fluid into and/or out of the containing box body, and regulates the test pressure in the containing box body by controlling the flow of the test fluid transferred into and/or out.
Further, the pressurizing device further comprises: the fluid storage box body is used for storing test fluid, the transferring and adjusting device is arranged between the accommodating box body and the fluid storage box body, and the transferring and adjusting device transfers the test fluid into the accommodating box body from the fluid storage box body and/or transfers the test fluid out of the accommodating box body into the fluid storage box body.
Further, the transfer and regulation device comprises: the first pipeline is communicated with the containing box body and the fluid storage box body, and a pump body and a first valve are arranged on the first pipeline. And the second pipeline is communicated with the accommodating box body and the fluid storage box body, and a second valve is arranged on the second pipeline.
Further, the test device further comprises: and the pressure sensor is used for measuring the test pressure at the joint of the first flange and the second flange.
Further, the test device further comprises: the cylinder comprises a first cylinder body and a second cylinder body, wherein the second flange is positioned below the first flange, the top of the first cylinder body is in sealing connection with the second flange, the bottom of the first cylinder body is provided with an opening, the bottom of the second cylinder body is in sealing connection with the first flange, and the top of the second cylinder body is closed. The pressurizing device comprises a containing box body, the opening is located outside the containing box body, the bottom wall of the containing box body is in sealing connection with the cylinder wall of the second flange, or the top wall and the bottom wall of the containing box body are respectively in sealing connection with the cylinder walls of the first flange and the second flange.
According to another aspect of the present invention, there is provided a method for verifying sealing performance of a connection flange, comprising: step S10: and butting the first flange and the second flange. Step S20: and applying pressing force towards the joint of the first flange and the second flange by a pressing device. Step S30: a test pressure is established at the interface of the first flange and the second flange by a test fluid within the pressurizing device. Step S40: the test fluid leaking inwardly from the abutment of the first flange and the second flange is measured by a measuring device. Step S50: and obtaining the leakage rate of the butt joint of the first flange and the second flange.
Further, step S40 further includes: the volume of test fluid leaking inwardly from the abutment of the first flange and the second flange per unit time is measured by a measuring device.
Further, step S20 further includes: the pressing device is adjusted so that the pressing force reaches a first preset value.
Further, step S30 further includes: and adjusting the pressurizing device to enable the test pressure to reach a second preset value.
Further, the pressurizing device includes an accommodating box and a transferring and adjusting device, and step S30 further includes: the flow of the test fluid transferred into and/or out of the accommodating box body is controlled by the transferring and adjusting device, so that the test pressure reaches a second preset value.
Further, pressure device includes the holding box, the fluid stores the box and transports and adjusting device, transports and adjusting device includes first pipeline and second pipeline, and first pipeline and holding box and fluid storage box intercommunication are provided with the pump body and first valve on the first pipeline, and the second pipeline is provided with the second valve with holding box and fluid storage box intercommunication on the second pipeline, and step S30 includes: step S31: the first valve is opened and the second valve is closed. Step S32: and opening the pump body, and completely filling the containing box body with the test fluid in the fluid storage box body under the action of the pump body. Step S33: and opening the second valve, and dynamically adjusting the opening degrees of the first valve and the second valve until the test pressure reaches a second preset value.
By applying the technical scheme of the invention, the stress condition of the first flange and the second flange under the working condition during actual connection is simulated through the pressing device and the pressurizing device, and the test fluid leaked from the joint of the first flange and the second flange to the interior of the flange is measured through the measuring device, so that the leakage rate of the connection of the first flange and the second flange is obtained, and whether the sealing performance of the flange meets the design requirement is verified. The testing device can reasonably simulate the real working condition of the connecting flange, so that the measurement of the sealing performance of the flange connection is more accurate.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
Other objects and advantages of the present invention will become apparent from the following description of the invention which refers to the accompanying drawings, and may assist in a comprehensive understanding of the invention. In the drawings:
fig. 1 is a schematic structural diagram of a testing apparatus for verifying sealing performance of a flange connection according to a first embodiment of the invention;
FIG. 2 is a schematic structural diagram of a test device for verifying the sealing performance of a flange connection according to a second embodiment of the invention;
FIG. 3 is a schematic structural diagram of a testing device for verifying the sealing performance of a flange connection according to a third embodiment of the invention;
FIG. 4 illustrates a flow chart of a verification method for verifying flange joint sealing performance in accordance with an embodiment of the present invention; and
fig. 5 shows a detailed flow chart of step 30 of the authentication method of fig. 4.
It is noted that the drawings are not necessarily to scale and are merely illustrative in nature and not intended to obscure the reader.
Description of reference numerals:
100. a testing device; 11. a first flange; 12. a second flange; 20. a pressing device; 30. a pressurizing device; 31. a housing box body; 32. a fluid storage tank; 33. a transfer and conditioning device; 331. a first pipeline; 332. a second pipeline; 333. a first valve; 334. a second valve; 335. a pump body; 40. a collection device; 41. a first cylinder; 411. an opening; 42. collecting the main body; 50. a second cylinder; 60. a pressure sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention. It should be apparent that the described embodiment is one embodiment of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
It is to be noted that technical terms or scientific terms used herein should have the ordinary meaning as understood by those having ordinary skill in the art to which the present invention belongs, unless otherwise defined. If the description "first", "second", etc. is referred to throughout, the description of "first", "second", etc. is used only for distinguishing similar objects, and is not to be construed as indicating or implying a relative importance, order or number of technical features indicated, it being understood that the data described in "first", "second", etc. may be interchanged where appropriate. In addition, if "and/or" is presented throughout, it is meant to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or schemes in which both A and B are satisfied.
Example one
As shown in fig. 1, according to one embodiment, a test apparatus 100 for verifying sealing performance of a flange connection is provided, the test apparatus 100 including: the device comprises a first flange 11, a second flange 12, a pressing device 20, a pressurizing device 30 and a measuring device. Wherein, the first flange 11 and the second flange 12 are arranged in a butt joint mode. The pressing device 20 applies a pressing force to the first flange 11 and the second flange 12 toward the joint of the two, that is, the first flange 11 and the second flange 12 are pressed by the pressing device 20. The pressing device 20 simulates pressing force of the flange under working conditions, and the structure of the pressing device can adopt a bolt locking mode or a hydraulic pressing mode. The pressurizing device 30 is provided with a test fluid, and the test fluid completely wraps the butt joint of the first flange 11 and the second flange 12 and forms a test pressure at the butt joint.
In the present embodiment, the first flange 11 is butted against the second flange 12, which is the same way as the first flange 11 and the second flange 12 are arranged in the actual working condition. The pressing device 20 applies a pressing force to the first flange 11 and the second flange 12 toward the joint of the first flange 11 and the second flange 12, so as to simulate the pressing force applied to the joint of the first flange 11 and the second flange 12 in the actual connection. In general, the joint between the first flange 11 and the second flange 12 refers to a position where the sealing surface of the first flange 11 and the sealing surface of the second flange 12 are in contact with each other. The pressurizing device 30 completely covers the joint of the first flange 11 and the second flange 12, i.e. the joint of the first flange 11 and the second flange 12 cannot exchange materials with the environment outside the pressurizing device 30. The test fluid is contained in the pressurizing device 30, and the test fluid submerges the joint of the first flange 11 and the second flange 12 to enable the joint to form a test pressure, so that the test pressure can be used for simulating the external environment pressure received by the joint of the first flange 11 and the second flange 12 in the actual working condition.
Under the combined action of the pressing device 20 and the pressurizing device 30, the stress condition of the first flange 11 and the second flange 12 under the working condition during actual connection is simulated, and the test fluid leaked from the joint of the first flange 11 and the second flange 12 to the inside of the flange is measured through the measuring device, so that the leakage rate of the joint of the first flange 11 and the second flange 12 is obtained, and whether the sealing performance of the flange meets the design requirement or not is verified. The testing device can reasonably simulate the real working condition of the connecting flange, and the measurement of the sealing performance of the flange connection is more accurate.
As shown in fig. 1, in the first embodiment, the pressing force and the test pressure are adjustable, that is, the pressing force applied to the first flange 11 and the second flange 12 toward the joint is adjusted by the pressing device 20, and the test pressure applied to the joint of the first flange 11 and the second flange 12 by the test fluid is adjusted by the pressurizing device 30. When the flange is in actual use, the pressure at the flange connection part is different along with the difference of the environmental pressure of the flange (for example, the arrangement depth of the flange in liquid is different), and the pressing force of the flange is different along with the difference of the bearing of the flange, so that the flange is in different working conditions. According to different stress conditions of different working conditions of flange application, the pressing force and the test pressure are adjusted to appropriate values, the flexibility is higher, and the simulation of different working conditions can be realized.
In this example, the test apparatus 100 was used to verify the sealing performance of a flanged connection in a reactor pool. The multi-section hanging basket structures in the reactor water pool are positioned and connected through flanges. Considering the operability of the remote disassembly and assembly of the hanging basket during the refueling operation of the reactor, the connecting flanges of the hanging basket are positioned only by pins and are compressed tightly by the gravity of the hanging basket. The pressing force provided by the pressing device 20 of the test device 100 is a pressing force generated by simulating the gravity of the hanging basket, and the magnitude of the pressing force in the test needs to be adjusted according to the specific situation of the hanging basket. In addition, the test pressure provided by the pressurizing device 30 is a pressure which simulates the pressure to which the connecting flange of the hanging basket is subjected at different depths in the pool water, and the test pressure in the test needs to be adjusted according to the specific situation of the connecting flange.
It should be noted that the pressing force and the test pressure of the testing device 100 are not limited to be adjustable, and in other embodiments, the pressing force and the test pressure may be set to fixed values only for testing the leakage amount at the flange joint under a specific working condition. In addition, the test apparatus 100 is not limited to verifying the sealing performance of the flange connection in the reactor pool, and may verify the sealing performance of the flange in other situations in other embodiments.
As shown in fig. 1, in the first embodiment, the testing apparatus 100 further includes a collecting device 40, the collecting device 40 is located below the first flange 11 and the second flange 12, and the collecting device 40 is used for collecting the test fluid leaking from the joint of the first flange 11 and the second flange 12 to the inside. The collecting device 40 is disposed below the first flange 11 and the second flange 12, and is configured to collect the test fluid by using gravity, and measure the collected test fluid by using a measuring device after a certain time interval. The collection device 40 can be replaced at each measurement, or the measurement device can measure the test fluid directly in the collection device 40, and finally take the difference.
In the present embodiment, the test fluid is a liquid, but the type of the test fluid is not limited to this, and the test fluid may be a gas in other embodiments. In another embodiment, the leaked test fluid may be directly measured by the measuring device without providing the collecting device. For example, the measuring device is a measuring cylinder or a measuring cup, through which the leaked test fluid is directly taken for measurement.
As shown in fig. 1, in the first embodiment, the collecting device 40 includes a first cylinder 41. The second flange 12 is located below the first flange 11. The first cylinder 41 is sealingly connected to the second flange 12. The bottom of the first cylinder 41 has an opening 411 and at least one guide slope, and the opening 411 corresponds to the lowest of the guide slopes. The provision of the guide slope enables the test fluid to be collected at one location, i.e., at the opening 411, facilitating the collection operation of the test fluid. Preferably, in this embodiment, the guide slope extends along a circumference of the first cylinder 41 to form a funnel shape, so that the test fluid leaking from various angles can flow through the guide slope, and the collection effect is better.
It should be noted that, as will be understood by those skilled in the art, the term "sealed connection" herein means that the port of the second flange 12 is tightly connected with the first cylinder 41, so that the external environment cannot communicate with the inside of the flange through the port of the second flange 12. Optionally, the second flange 12 and the first cylinder 41 are hermetically connected by welding.
As shown in fig. 1, in the first embodiment, the collecting device 40 further includes a collecting body 42, and the collecting body 42 is in communication with the opening 411 of the first cylinder 41 through a pipeline. Collection body 42 is used to store test fluid. The measuring device verifies the sealing properties of the flanged connection by measuring the test fluid in the collection body 42. Due to the fixed connection between the first cylinder 41 and the second flange 12, the connection between the collecting body 42 and the first cylinder 41 is a detachable connection in order to facilitate the measurement of the test fluid in the collecting body 42. Of course, the specific structure of the collecting device 40 is not limited to this, and in other embodiments not shown in the drawings, the collecting device may include only the first cylinder, and the leaked test fluid may be taken in and measured by a measuring device such as a measuring cylinder or a measuring cup below the first cylinder.
As shown in fig. 1, in the first embodiment, the testing device 100 further includes a second cylinder 50, the second flange 12 is located below the first flange 11, the bottom of the second cylinder 50 is connected with the first flange 11 in a sealing manner, and the top of the second cylinder 50 is closed. The second cylinder 50 is used for sealing the upper end of the first flange 11, and in the first embodiment, is used for isolating the inside of the pressurizing device 30 from the inside of the first flange 11 and the second flange 12, and preventing the test fluid from entering the inside of the flanges from other positions except the flange connection, so that the measurement of the sealing performance is influenced.
In the first embodiment, the pressurizing device 30 comprises a housing box 31 and a transferring and adjusting device 33. The accommodating box 31 at least wraps the butt joint of the first flange 11 and the second flange 12. In this embodiment, the accommodating box 31 is used for simulating a reactor pool, and the accommodating box 31 is composed of a cylindrical box and a detachable top cover, so that the internal facilities are convenient to operate. The transfer and regulation device 33 transfers the test fluid into and/or out of the housing tank 31, and regulates the test pressure in the housing tank 31 by controlling the flow rate of the test fluid transferred into and/or out.
Specifically, the accommodating box 31 completely wraps the joint of the first flange 11 and the second flange 12, the accommodating box 31 has a fixed volume, the accommodating box 31 contains test fluid, and the test fluid is transferred into or out of the accommodating box 31 through the transfer and adjustment device 33, so as to change the pressure in the accommodating box 31. When the test fluid is liquid, the test fluid is transferred into the accommodating box body 31 through the transfer and adjustment device 33, and the volume in the accommodating box body 31 is fixed, so that the test pressure of the liquid at the joint of the first flange 11 and the second flange 12 can be increased by increasing the amount of the liquid, the test pressure mainly comes from the pressure of the liquid in the vertical direction, and the test pressure at the joint of the first flange 11 and the second flange 12 is adjusted by adjusting the vertical height of the liquid. Wherein, the liquid can be tap water or deionized water.
Of course, in other embodiments, the test fluid may be gas, and when the volume of the housing box 31 is fixed, the test pressure at the joint of the first flange 11 and the second flange 12 is changed by adjusting the amount of gas in the housing box 31, in this case, the collecting device 40 is also correspondingly adjusted to be a device capable of collecting gas, and the measuring device is also adjusted to be a measuring device capable of measuring gas.
In addition, the test fluid may be a gas or a liquid. The liquid in the accommodating box body 31 completely wraps the joint of the first flange 11 and the second flange 12, the accommodating box body 31 is not filled with the liquid, gas is filled above the surface of the liquid, and the transferring and adjusting device 33 adjusts the test pressure of the liquid on the joint of the first flange 11 and the second flange 12 by adjusting the amount of the gas in the close box body.
As shown in fig. 1, in the present embodiment, the pressurizing device 30 further includes a fluid storage tank 32 for storing the test fluid. The transfer and regulation device 33 is disposed between the housing tank 31 and the fluid storage tank 32. The transfer and regulation device 33 transfers the test fluid from the fluid storage tank 32 into the receiving tank 31 and/or from the receiving tank 31 into the fluid storage tank 32.
As shown in fig. 1, in the present embodiment, the transfer and adjustment device 33 includes a first pipeline 331, and the first pipeline 331 communicates with the housing tank 31 and the fluid storage tank 32. The first pipe 331 is provided with a pump body 335 and a first valve 333. The second line 332 communicates with the housing tank 31 and the fluid storage tank 32. A second valve 334 is provided in the second line 332.
Specifically, the first pipeline 331 is used to pump the test fluid from the fluid storage tank 32 into the housing tank 31 through the pump body 335, and the second pipeline 332 is used to return the test fluid in the housing tank 31 to the fluid storage tank 32. The inlet and outlet flow of the test fluid in the accommodating box 31 can be adjusted by adjusting the opening degrees of the first valve 333 and the second valve 334, so that the test pressure at the joint of the first flange 11 and the second flange 12 is adjusted, and the operation is simple and easy to control.
It should be noted that the specific structure of the transferring and adjusting device 33 is not limited to this, and in other embodiments not shown in the figures, the transferring and adjusting device may include two pipes, the two pipes are respectively communicated with the upper portion and the lower portion of the accommodating box body, the upper pipe is directly connected with a water source for water inlet, the lower pipe is used for liquid outlet, and the liquid from the lower pipe directly flows away.
As shown in fig. 1, in the first embodiment, the testing apparatus 100 further includes a pressure sensor 60 for measuring a testing pressure at the joint of the first flange 11 and the second flange 12. The pressure sensor 60 is used for measuring the test pressure at the joint of the first flange 11 and the second flange 12 in real time, the test fluid is transferred into or out of the accommodating box 31 through the transferring and adjusting device 33 to adjust the pressure, the pressure sensor 60 reflects the test pressure at the joint of the first flange 11 and the second flange 12 in real time, and further adjusts the test fluid amount in the accommodating box 31 by adjusting the opening degrees of the first valve 333 and the second valve 334 on the first pipeline 331 and the second pipeline 332. In the present embodiment, the pressure sensor 60 is mounted on the side wall of the housing case 31.
As shown in fig. 1, in the first embodiment, the first flange 11 is connected to the second cylinder 50 by welding, the second flange 12 is connected to the first cylinder 41 by welding, the bottom wall of the accommodating box 31 is welded to the outer cylinder wall of the first cylinder 41 to form a sealed connection, the top of the second cylinder 50 is sealed, the accommodating box 31 completely wraps the second cylinder 50, so as to wrap the butt joint of the first flange 11 and the second flange 12 by the accommodating box 31, and the inside of the first flange 11 and the inside of the second flange 12 are isolated from the inside of the accommodating box 31 and the outside of the whole device.
Example two
The difference between the second embodiment and the first embodiment is:
as shown in fig. 2, in the second embodiment, in order to reduce the volume of the accommodating box 31, the top wall and the bottom wall of the accommodating box 31 are hermetically connected to the outer wall of the second cylinder 50 and the outer wall of the first cylinder 41, respectively. When the test fluid is a liquid, the top wall of the second cylinder 50 may not be sealed.
The other structures of the second embodiment are the same as those of the first embodiment, and are not described herein again.
EXAMPLE III
The difference between the third embodiment and the first and second embodiments is that:
as shown in fig. 3, in the third embodiment, on the premise that the accommodating box 31 is not limited by volume, in order to facilitate installation, the first flange 11, the second flange 12, the collecting device 40, the first cylinder 41, and the second cylinder 50 may be completely disposed inside the accommodating box 31, at this time, the second cylinder 50 is hermetically connected to the first flange 11, the collecting device 40 is hermetically connected to the second flange 12, meanwhile, the top end of the second cylinder 50 is sealed, and the collecting device 40 is integrally and hermetically disposed.
The other structures of the third embodiment are the same as those of the first embodiment, and are not described herein again.
As shown in fig. 4, the present invention also provides a verification method for verifying the sealing performance of a flange connection, an embodiment of the verification method according to the present invention includes the steps of:
step S10: butting the first flange 11 and the second flange 12;
step S20: applying pressing force towards the joint of the first flange 11 and the second flange 12 through a pressing device 20, and adjusting the pressing device 20 to enable the pressing force to reach a first preset value;
step S30: forming a test pressure at the joint of the first flange 11 and the second flange 12 by the test fluid in the pressurizing device 30, and controlling the flow rate of the test fluid transferred into and/or out of the accommodating box 31 by adjusting the transferring and adjusting device 33 so as to enable the test pressure to reach a second preset value;
step S40: measuring the volume of the test fluid leaking from the butt joint of the first flange 11 and the second flange 12 to the inside per unit time by a measuring device;
step S50: and obtaining the leakage rate of the butt joint of the first flange 11 and the second flange 12.
The first preset value and the second preset value are determined according to the stress condition of the specific working condition of the flange, and the first preset value and the second preset value can be specific values or range values. It should be noted that the pressing force and the test pressure of the test method are not limited to be adjustable, and in other embodiments, the pressing force and the test pressure may be set to fixed values, and the addition amount of the test medium and the height of the flange are fixed, and are only used for testing the leakage amount at the flange joint under a specific working condition. The manner of adjusting the test pressure is not limited thereto, and in other embodiments, other possible pressure adjustment manners may be used. In addition, the measuring device is not limited to measuring the volume of the leaked test fluid, and in another embodiment, the weight of the test fluid leaking from the abutting portion of the first flange and the second flange to the inside per unit time may be measured.
In the present embodiment, the pressurizing device 30 includes an accommodating tank 31, a fluid storage tank 32, and a transferring and adjusting device 33, the transferring and adjusting device 33 includes a first pipeline 331 and a second pipeline 332, the first pipeline 331 is communicated with the accommodating tank 31 and the fluid storage tank 32, a pump body 335 and a first valve 333 are disposed on the first pipeline 331, the second pipeline 332 is communicated with the accommodating tank 31 and the fluid storage tank 32, and a second valve 334 is disposed on the second pipeline 332.
As shown in fig. 5, step S30 includes:
step S31: opening the first valve 333 and closing the second valve 334;
step S32: opening the pump body 335, and completely filling the accommodating box body 31 with the test fluid in the fluid storage box body 32 under the action of the pump body 335;
step S33: the second valve 334 is opened and the opening of the first valve 333 and the second valve 334 are dynamically adjusted until the test pressure reaches a second preset value.
It should be noted that the containing tank 31 may not be filled with the test fluid, and in this case, the test pressure at the joint of the first flange 11 and the second flange 12 may be adjusted by adjusting the vertical height of the liquid.
When the test is carried out, firstly, the test device is installed, and the pressing force of the pressing device 20 on the first flange 11 and the second flange 12 is adjusted to reach a first preset value; then, the second valve 334 is closed, the first valve 333 is fully opened, the pump body 335 is opened, and the test fluid in the fluid storage tank 32 is filled into the accommodating tank 31 through the first pipeline 331; after the interior of the accommodating box 31 is filled with the test fluid, the second valve 334 is opened, and then the opening degree of the second valve 334 and the opening degree of the first valve 333 are continuously adjusted to adjust the test pressure displayed by the pressure sensor 60 to the second preset value. And finally, measuring the volume of the test fluid collected in a second preset value in unit time by measuring devices such as a measuring cylinder and the like to obtain the leakage rate of the joint of the first flange 11 and the second flange 12, so as to verify whether the sealing performance of the flange meets the design requirement.
On the premise of meeting accurate measurement, the embodiment of the invention provides the test device 100 convenient to assemble and disassemble and the convenient test method, and the working condition in the actual flange connection process is simulated through the pressing device 20 and the pressurizing device 30, so that the tightness of the flange connection is measured more accurately, and the test method is simple and feasible.
It should also be noted that, in the case of the embodiments of the present invention, features of the embodiments and examples may be combined with each other to obtain a new embodiment without conflict.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and the scope of the present invention is subject to the scope of the claims.
Claims (18)
1. A test device for verifying flange joint sealing performance, characterized by comprising:
a first flange (11) and a second flange (12), the first flange (11) interfacing with the second flange (12);
a pressing device (20), wherein the pressing device (20) applies pressing force towards the joint of the first flange (11) and the second flange (12);
a pressurizing device (30), wherein a test fluid is arranged in the pressurizing device (30), completely wraps the butt joint of the first flange (11) and the second flange (12) and forms a test pressure at the butt joint;
a measuring device for measuring the test fluid leaking inwardly from the abutment of the first flange (11) and the second flange (12).
2. The test device of claim 1, wherein:
the pressing force and/or the test pressure are adjustable.
3. The testing device of claim 1, further comprising:
-a collecting device (40) located below the first flange (11) and the second flange (12), the collecting device (40) being adapted to collect the test fluid leaking inwardly from the abutment of the first flange (11) and the second flange (12).
4. The test device of claim 3, wherein:
the collecting device (40) comprises a first cylinder (41), the second flange (12) is positioned below the first flange (11), the first cylinder (41) is in sealing connection with the second flange (12), the bottom of the first cylinder (41) is provided with an opening (411) and at least one guide inclined plane, and the opening (411) corresponds to the lowest part of the guide inclined plane.
5. The testing device of claim 4, wherein:
the guide slope extends along the circumference of the first cylinder (41) for one circle to form a funnel shape.
6. The testing device of claim 4, wherein:
the collecting device (40) further comprises a collecting body (42), the collecting body (42) being in communication with the opening (411) of the first cylinder (41).
7. The testing device of claim 1, further comprising:
the second cylinder (50), the second flange (12) is located below the first flange (11), the bottom of the second cylinder (50) is connected with the first flange (11) in a sealing mode, and the top of the second cylinder (50) is closed.
8. Testing device according to claim 1, characterized in that the test pressure is adjustable, the pressurizing device (30) comprising:
the accommodating box body (31) at least wraps the butt joint of the first flange (11) and the second flange (12);
a transfer and adjustment device (33), wherein the transfer and adjustment device (33) transfers the test fluid into the containing box body (31) and/or transfers the test fluid out of the containing box body (31), and the flow rate of the test fluid transferred into and/or out is controlled to adjust the test pressure in the containing box body (31).
9. Testing device according to claim 8, characterized in that the pressurizing means (30) further comprise:
a fluid storage tank (32) for storing the test fluid, wherein the transfer and adjustment device (33) is arranged between the receiving tank (31) and the fluid storage tank (32), and wherein the transfer and adjustment device (33) transfers the test fluid from the fluid storage tank (32) into the receiving tank (31) and/or from the receiving tank (31) out of the fluid storage tank (32).
10. Test device according to claim 9, characterized in that said transport and regulation device (33) comprises:
a first pipeline (331), the first pipeline (331) is communicated with the accommodating box body (31) and the fluid storage box body (32), and a pump body (335) and a first valve (333) are arranged on the first pipeline (331);
a second pipeline (332), wherein the second pipeline (332) is communicated with the accommodating tank body (31) and the fluid storage tank body (32), and a second valve (334) is arranged on the second pipeline (332).
11. The testing device of claim 1, further comprising:
a pressure sensor (60) for measuring the test pressure at the interface of the first flange (11) and the second flange (12).
12. The testing device of claim 1, further comprising:
a first cylinder (41) and a second cylinder (50), wherein the second flange (12) is positioned below the first flange (11), the top of the first cylinder (41) is connected with the second flange (12) in a sealing manner, the bottom of the first cylinder (41) is provided with an opening (411), the bottom of the second cylinder (50) is connected with the first flange (11) in a sealing manner, and the top of the second cylinder (50) is closed;
the pressurizing device (30) comprises a containing box body (31), the opening (411) is located outside the containing box body (31), the bottom wall of the containing box body (31) is in sealing connection with the cylinder wall of the second flange (12), or the top wall and the bottom wall of the containing box body (31) are in sealing connection with the cylinder walls of the first flange (11) and the second flange (12) respectively.
13. A verification method for verifying sealing performance of a flanged connection, comprising:
step S10: butting the first flange (11) and the second flange (12);
step S20: applying a pressing force to the first flange (11) and the second flange (12) by a pressing device (20) towards the joint of the first flange and the second flange;
step S30: -creating a test pressure at the abutment of the first flange (11) and the second flange (12) by means of a test fluid in a pressurizing device (30);
step S40: measuring the test fluid leaking inwards from the abutment of the first flange (11) and the second flange (12) by means of a measuring device;
step S50: and obtaining the leakage rate of the butt joint of the first flange (11) and the second flange (12).
14. The authentication method according to claim 13, wherein said step S40 further comprises:
measuring the volume of the test fluid leaking inwardly per unit time from the abutment of the first flange (11) and the second flange (12) by means of a measuring device.
15. The authentication method according to claim 13, wherein said step S20 further comprises:
the pressing device (20) is adjusted such that the pressing force reaches a first preset value.
16. The authentication method according to claim 13, wherein said step S30 further comprises:
-adjusting the pressurizing means (30) to bring the test pressure to a second preset value.
17. Authentication method according to claim 16, wherein said pressurization means (30) comprise a containment tank (31) and a transfer and conditioning device (33), said step S30 further comprising:
controlling the flow of the test fluid into and/or out of the receiving tank (31) by means of the transfer and regulation device (33) in order to bring the test pressure to the second predetermined value.
18. Authentication method according to claim 16, wherein the pressurizing device (30) comprises a housing tank (31), a fluid storage tank (32) and a transfer and regulation device (33), the transfer and regulation device (33) comprising a first pipeline (331) and a second pipeline (332), the first pipeline (331) communicating with the housing tank (31) and the fluid storage tank (32), the first pipeline (331) being provided with a pump body (335) and a first valve (333), the second pipeline (332) communicating with the housing tank (31) and the fluid storage tank (32), the second pipeline (332) being provided with a second valve (334), the step S30 comprising:
step S31: opening the first valve (333), closing the second valve (334);
step S32: opening the pump body (335), and completely filling the accommodating box body (31) with the test fluid in the fluid storage box body (32) under the action of the pump body (335);
step S33: and opening the second valve (334), and dynamically adjusting the opening degrees of the first valve (333) and the second valve (334) until the test pressure reaches the second preset value.
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| CN202010716159.9A CN111829731B (en) | 2020-07-23 | 2020-07-23 | Test device and method for verifying sealing performance of flange connection |
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| CN202010716159.9A CN111829731B (en) | 2020-07-23 | 2020-07-23 | Test device and method for verifying sealing performance of flange connection |
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| CN111829731B CN111829731B (en) | 2022-03-11 |
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| CN111829731B (en) | 2022-03-11 |
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