Testing device for loop sealing flange

Abstract

The utility model provides a testing device for a loop sealing flange, and relates to the technical field of sealing flanges, the testing device comprises an upper flange, a loop ring, a lower flange base and a sealing gasket; the upper flange is fixedly connected to the lower flange base through the movable lantern ring; the upper flange is provided with an upper flange cavity, and the lower flange base is provided with a lower flange cavity. The upper flange cavity is communicated with the lower flange cavity; one end of the vent hole is communicated with the cavity of the upper flange, and the other end of the vent hole is connected with a pipe connecting nozzle; and the sealing gasket is hermetically connected to the joint of the upper flange and the lower flange base. The testing device does not deform when being pressurized for multiple times, is convenient to disassemble, assemble and move, and is generally used for multiple tests such as high and low temperature airtightness, normal / low temperature vibration and the like.

Description

Technical Field

[0001] The present application relates to the technical field of sealed flanges, and in particular to a test device for loose flange seals. Background Art

[0002] The sealing gasket sealing structure is a relatively mature and widely used sealing technology in recent years. The sealing gasket is often placed in a tenon groove to achieve a sealing effect. Due to the different materials of the sealing gasket, this type of sealing structure is also often used on the end face flanges of rocket pressurized delivery to achieve a sealing effect. The sealing gasket has good medium compatibility with liquid hydrogen, liquid oxygen, gaseous oxygen, and helium in the rocket pressurized delivery pipeline, so it is widely used. However, rocket seals need to undergo strict experimental verification, and currently, there are few test devices related to flange seals.

[0003] Although the patent with the publication number CN 220304768 U discloses an efficient flange seal detection tooling that can achieve rapid airtight inspection of the flange seal structure, the structure described in the patent can only perform airtight inspection and cannot conduct tests such as high and low temperature tests and low temperature immersion tests. Moreover, due to the simple modules, it is impossible to perform repeated pressurization tests on the test piece. The defects existing in the existing equipment technology in the sealing gasket seal test are that during the loose tenon groove flange seal test, it mainly faces problems such as deformation of the sealing surface due to multiple pressurizations, inconvenient disassembly, movement, and complex and bulky detection systems that are not universal.

[0004] The specific defects of the loose tenon groove flange seal test are as follows:

[0005] 1. Deformation of the sealing surface due to multiple pressurizations: In the existing loose flange seal test device, after multiple inflations and deflations and repeated tests, the upper dome of the flange is prone to deformation. On the one hand, it will affect the continued use of the sealing tooling and reduce the pressure-bearing effect. On the other hand, the deformation of the flange dome further affects the roundness of the tenon, resulting in out-of-tolerance roundness and concentricity of the tenon surface, making it impossible to install the groove surface for continued use.

[0006] 2. In the existing loose flange seal test device, the tolerance zone between the flange tenon surface and the groove surface is small, and actual installation is not easy. Often, the upper flange is placed on the lower flange of the groove surface, and it needs to be pushed and aligned multiple times, which is extremely likely to cause scratches on the tenon sealing surface and result in seal leakage.

[0007] 3. The existing loose flange seal test device system is relatively large, and it can only achieve single tests such as airtightness, high and low temperatures, etc., and the investment in tooling and R & D design is huge.

[0008] Therefore, the technical problem that needs to be solved urgently at present is: how to provide a test device for loose flange seals that will not deform the sealing surface after multiple pressurizations, is convenient for disassembly, movement, and is applicable to multiple tests such as high and low temperature airtightness, normal / low temperature vibration, etc. Summary of the Utility Model

[0009] The purpose of this application is to provide a test device for loose flange seals. The test device can be pressurized multiple times without deformation of the sealing surface, is convenient for disassembly, installation, and movement, and is applicable to multiple tests such as high and low temperature airtightness, normal / low temperature vibration, etc. It provides test support and experimental guarantee for the next-step design of rocket booster delivery flanges and the assurance of sealing accuracy.

[0010] To achieve the above object, this application provides a test device for loose flange seals, which includes: an upper flange, a loose ring, a lower flange base, and a sealing gasket; the upper flange is fixedly connected to the lower flange base through the loose ring; the upper flange has an upper flange cavity, and the lower flange base has a lower flange cavity; the upper flange cavity and the lower flange cavity are communicated; the upper flange is provided with a vent hole, one end of the vent hole is communicated with the upper flange cavity, and the other end is connected with a nozzle; the sealing gasket is sealingly connected at the joint of the upper flange and the lower flange base.

[0011] The test device for loose flange seals as described above, wherein the upper flange includes: an upper flange cover, a handle, a reinforcing rib, and a stress platform; the handle is installed on the top of the upper flange cover; the reinforcing rib is fixedly connected inside the upper flange cavity; the stress platform is arranged at the edge of the upper flange cover.

[0012] The test device for loose flange seals as described above, wherein the reinforcing rib includes a transverse reinforcing rib and a longitudinal reinforcing rib, the transverse reinforcing rib and the longitudinal reinforcing rib are vertically arranged, presenting a cross-shaped structure, and the vent hole is arranged at the intersection of the transverse reinforcing rib and the longitudinal reinforcing rib.

[0013] The test device for loose flange seals as described above, wherein a knife groove is arranged on the surface of the upper flange close to the lower flange base; the knife groove is located on the surface of the stress platform close to the lower flange base.

[0014] The test device for loose flange seals as described above, wherein the loose ring is circular; the loose ring is sleeved on the edge of the upper flange cover; the loose ring presses on the end face of the stress platform on the side away from the lower flange base and is fixedly connected to the lower flange base.

[0015] The test device for loose flange seals as described above, wherein a plurality of bolt holes are uniformly arranged in the circumferential direction of the loose ring; a plurality of lower flange bolt holes are arranged in the circumferential direction of the lower flange base; the lower flange bolt holes correspond to the bolt holes of the loose ring one by one and are penetrated by bolts.

[0016] The test device for loose flange seal as described above, wherein a lower flange reinforcing rib is arranged in the lower flange cavity of the lower flange base.

[0017] The test device for loose flange seal as described above, wherein a sealing groove is arranged on one side of the lower flange base close to the upper flange; a tenon is arranged on one side of the upper flange close to the lower flange base; the sealing gasket is arranged in the sealing groove, and the tenon presses on one side of the sealing gasket away from the sealing groove.

[0018] The test device for loose flange seal as described above, wherein a plurality of vibration table fixing holes for fixedly connecting with the vibration table are arranged on the lower flange base along its circumferential direction.

[0019] The test device for loose flange seal as described above, wherein the side of the knife groove away from the lower flange base is an inclined surface.

[0020] The beneficial effects achieved by this application are as follows:

[0021] (1) In this application, a reinforcing rib structure is added in the upper flange and the lower flange base, and on the basis of maintaining the equal pressure of the gas container, the volume of the cavity or the internal cavity of the upper flange and the lower flange base is minimized as much as possible, reducing the gas consumption and thus reducing the cost.

[0022] (2) In this application, reinforcing ribs with a cross structure are arranged inside the upper flange and the lower flange base, fully offsetting the fatigue damage to the top of the test tooling during multiple pressurization processes. And the material is cryogenically cooled with liquid nitrogen for 4 hours at the beginning of material processing to fully release the stress of the material itself. During actual pressurization and low-temperature soaking tests, the material will not deform, avoiding affecting the interpretation of test data.

[0023] (3) In this application, a handle is arranged on the upper flange, which is convenient for the upper flange to be lifted and moved for installation, reducing the risk of scratching the sealing surface between the upper flange and the lower flange base. And the upper flange is provided with a knife groove structure, and the design of the knife groove is convenient for inserting a flat disassembly tool into the upper flange cover after the test, facilitating the replacement of the sealing gasket. And this knife groove structure does not affect the implementation effect of the tenon groove sealing structure, which is more conducive to the implementation of the test.

[0024] (4) A test device for loose flange seal in this application is applicable to multiple tests such as high and low temperature airtightness, normal / low temperature vibration, etc. Description of the Drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those skilled in the art, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram of a test device for a loose flange seal in an embodiment of the present application.

[0027] Figure 2 It is a cross-sectional view of a test device for a loose flange seal in an embodiment of the present application.

[0028] Figure 3 It is a schematic diagram of the upper flange in an embodiment of the present application.

[0029] Figure 4 For Figure 3 The enlarged schematic diagram at I in

[0030] Figure 5 It is a schematic diagram of the reinforcing rib and the knife groove in an embodiment of the present application.

[0031] Figure 6 It is a schematic structural diagram of the lower flange base in an embodiment of the present application.

[0032] Figure 7 It is a schematic diagram of the loose ring in an embodiment of the present application.

[0033] Figure 8 It is a schematic diagram of the normal temperature airtightness test in an embodiment of the present application.

[0034] Figure 9 It is a schematic diagram of the low temperature immersion test in an embodiment of the present application.

[0035] Figure 10 It is a schematic diagram of the vibration test in an embodiment of the present application.

[0036] Reference numerals: 1 - upper flange; 2 - loose ring; 3 - lower flange base; 4 - sealing gasket; 5 - bolt; 111 - upper flange cover; 112 - handle; 113 - nozzle; 114 - knife groove; 115 - reinforcing rib; 116 - stress platform; 117 - upper flange cavity; 118 - vent hole; 119 - tenon; 211 - bolt hole; 311 - lower flange cavity; 312 - lower flange bolt hole; 313 - sealing groove; 314 - lower flange reinforcing rib; 315 - vibration table fixing hole; 511 - nut; 512 - gasket. Detailed implementation manners

[0037] Combined with the accompanying drawings in the embodiments of the present application, the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0038] As Figure 1-7 shown, the present application provides a test device for a loose flange seal. The test device includes: an upper flange 1, a loose ring 2, a lower flange base 3, and a sealing gasket 4; the upper flange 1 is fixedly connected to the lower flange base 3 through the loose ring 2; the upper flange 1 has an upper flange cavity 117, and the lower flange base 3 has a lower flange cavity 311; the upper flange cavity 117 and the lower flange cavity 311 are communicated; the upper flange 1 is provided with a vent hole 118, one end of the vent hole 118 is communicated with the upper flange cavity 117, and the other end is connected with a nozzle 113; the sealing gasket 4 is sealingly connected to the connection between the upper flange 1 and the lower flange base 3. The vent hole 118 is in through connection with the external nozzle 113. The nozzle 113 is a short pipe connecting the outside of the vent hole 118.

[0039] When the test device of the present application is pressurized multiple times, the sealing surface (i.e., the surface connecting between the upper flange 1 and the lower flange base 3) will not deform. Pressurizing multiple times means filling gas into the upper flange cavity 117 and the lower flange cavity 311 through the nozzle 113 and the vent hole 118. The test device has a simple structure, is convenient for disassembly, installation and movement, and is applicable to multiple tests such as high and low temperature airtightness, normal / low temperature vibration, etc. It provides test support and experimental guarantee for the next step of rocket pressurized delivery flange design and sealing accuracy assurance.

[0040] As Figure 1-5 shown, the upper flange 1 includes: an upper flange cover 111, a handle 112, a reinforcing rib 115, and a stress platform 116; the handle 112 is installed on the top of the upper flange cover 111; the reinforcing rib 115 is fixedly connected inside the upper flange cavity 117; the stress platform 116 is arranged at the edge of the upper flange cover 111. Preferably, the upper flange cover 111 is circular. The handle 112 includes two, and the two handles 112 are arranged on the upper flange cover 111. The stress platform 116 is annular and is located at the edge of the upper flange cover 111. The stress platform 116 has a stress surface, and the stress surface is a plane, which is used to bear the extrusion of the loose ring 2, so that the loose ring 2 fixedly connects the upper flange 1 and the lower flange base 3 together.

[0041] As a specific embodiment of the present invention, in the structure of the upper flange 1, the upper flange cover 111 presents a convex cover shape, and the upper flange cover 111 protrudes in the direction away from the lower flange base 3; the handle 112 is symmetrically installed on the protruding side of the upper flange cover 111, which is convenient for moving and installing the upper flange 1.

[0042] As shown Figure 5 in the figure, the reinforcing rib 115 includes a transverse reinforcing rib and a longitudinal reinforcing rib, the transverse reinforcing rib and the longitudinal reinforcing rib are vertically arranged, presenting a cross-shaped structure, and the vent hole 118 is arranged at the intersection of the transverse reinforcing rib and the longitudinal reinforcing rib. By arranging the reinforcing rib 115 with a cross-shaped structure inside the upper flange 1, the fatigue damage to the top of the test tooling during multiple pressurization processes can be fully offset. And the material is cryogenically cooled with liquid nitrogen for 4 hours at the beginning of material processing to fully release the internal stress of the material itself. During the actual pressurization and low-temperature soaking tests, the material will not deform and affect the interpretation of test data.

[0043] As a specific embodiment of the present utility model, in addition to arranging the reinforcing rib 115 inside the upper flange cover 111, there is an upper flange cavity 117 left, and the upper flange cavity 117 is consistent with the actual size of the actual pipeline to simulate the actual pipeline size.

[0044] As shown Figure 3-5 in the figure, a tool starting groove 114 is arranged on the surface of the upper flange 1 close to the lower flange base 3; the tool starting groove 114 is located on the surface of the force-bearing platform 116 close to the lower flange base 3. The surface of the tool starting groove 114 away from the lower flange base 3 is an inclined surface, and the inclination angle of the inclined surface is 5 degrees. The tool starting groove 114 starts from the root of the tenon surface and ends at the outer edge of the upper flange 1. The design of the tool starting groove 114 facilitates the insertion of the upper flange cover 111 into a flat-blade disassembly tool after the test, facilitating the replacement of the sealing gasket 4. And this structural design does not affect the implementation effect of the tenon and groove sealing structure and is more conducive to the implementation of the test. The tool starting groove 114 is used to facilitate the disassembly and assembly of the upper flange cover 111.

[0045] As a specific embodiment of the present utility model, the loose flange ring 2 is circular; the loose flange ring 2 is sleeved on the edge of the upper flange cover 111; the loose flange ring 2 presses on the end face of the force-bearing platform 116 on the side away from the lower flange base 3 and is fixedly connected to the lower flange base 3.

[0046] As shown Figure 7 in the figure, a plurality of bolt holes 211 are evenly arranged in the circumferential direction of the loose flange ring 2; a plurality of lower flange bolt holes 312 are arranged along the circumferential direction of the lower flange base 3; the lower flange bolt holes 312 correspond to the bolt holes 211 of the loose flange ring 2 one by one, and bolts 5 pass through them. The bolts 5 pass through the lower flange bolt holes 312 and the bolt holes 211 of the loose flange ring 2, and gaskets 512 are sleeved on the upper and lower ends of the bolts 5, and one end of the bolts 5 passing through the lower flange bolt holes 312 and the bolt holes 211 of the loose flange ring 2 is connected with nuts 511, thereby realizing the locking connection between the loose flange ring 2 and the lower flange base 3, and further fixedly connecting the upper flange 1 and the lower flange base 3 together.

[0047] As shown Figure 1 and 6As shown in the figure, a lower flange reinforcing rib 314 is provided in the lower flange cavity 311 of the lower flange base 3. The lower flange reinforcing rib 314 is a reinforcing rib with a cross-shaped structure. By providing a reinforcing rib with a cross-shaped structure inside the lower flange base 3, the fatigue damage to the top of the test tooling during multiple pressurization processes can be fully offset. And the material is cryogenically cooled with liquid nitrogen for 4 hours at the beginning of material processing to fully release the internal stress of the material itself. During actual pressurization and low-temperature soaking tests, the material will not deform and affect the interpretation of test data.

[0048] As Figure 1 shown in the figure, in addition to the lower flange reinforcing rib 314 provided inside the lower flange base 3, a lower flange cavity 311 is also left. The size of the lower flange cavity 311 is the same as the actual size of the actual pipeline to simulate the actual pipeline size.

[0049] As Figure 2 and 6 shown in the figure, a sealing groove 313 is provided on the side of the lower flange base 3 close to the upper flange 1. The sealing groove 313 is circular; a tenon 119 is provided on the side of the upper flange 1 close to the lower flange base 3. The tenon 119 is circular. The tenon 119 can be fitted and clamped into the sealing groove 313; a sealing gasket 4 is provided in the sealing groove 313. The tenon 119 presses on the side of the sealing gasket 4 away from the sealing groove 313, and the tenon 119 is fitted and clamped into the sealing groove 313. The bottom surface of the upper flange 1 and the top surface of the lower flange base 3 are fitted and connected. A raised tenon 119 is provided on the side of the upper flange cover 111 facing away from the protrusion or close to the lower flange base 3. The tenon 119 protrudes from the bottom surface of the upper flange cover 111.

[0050] As Figure 6 shown in the figure, a plurality of vibration table fixing holes 315 for fixedly connecting with the vibration table are provided on the lower flange base 3 along its circumferential direction. The vibration table fixing holes 315 are evenly distributed on the flanging platform of the lower flange base 3. The vibration table fixing holes 315 are used for connecting the lower flange base 3 with the vibration table.

[0051] In this application, a test device is composed of the upper flange 1, the loose flange ring 2, the lower flange base 3 and the sealing gasket 4 to simulate the sealing equivalent effect in the actual rocket pressurization and transportation system. Simplify the components and conduct more sufficient test verification on the ground.

[0052] As a specific embodiment of the present invention, the installation steps of a test device for a loose flange seal are as follows:

[0053] 1). Place the sealing gasket 4 in the sealing groove 313 of the lower flange base 3. Through the handle 112, the raised tenon 119 of the upper flange is fitted into the sealing groove 313 of the lower flange base 3 by mortise and tenon. The upper and lower surfaces of the sealing gasket 4 are in contact with the tenon 119 and the bottom surface of the sealing groove 313 respectively.

[0054] 2), Pass the bolt 5 through the bolt holes 211 of the loose flange 2 and the lower flange bolt holes 312 in sequence. Add gaskets 512 above and below the bolt 5 and fasten them with nuts 511.

[0055] 3), Apply torque to the fasteners (bolt 5) in sequence from the diagonal directions of the circumferential surface of the loose flange 2. After applying torque diagonally, gradually apply torque clockwise according to technical requirements until the final value.

[0056] As a specific embodiment of the present utility model, the test sequence of a test device for loose flange seals is as follows: normal temperature airtight test, low temperature immersion airtight test, high temperature airtight test, vibration test, long-term storage airtightness test.

[0057] As a specific embodiment of the present utility model, the test steps of a test device for loose flange seals are as follows:

[0058] 1. Normal temperature airtight test:

[0059] 1), As shown in Figure 8 , Connect the helium gas cylinder to the test device for loose flange seals through a metal hose via a hand valve and a pressure gauge.

[0060] 2), Replace the gas in the test device for loose flange seals. Connect the hand valve to the gas cylinder, fill the test device with helium gas at 1 MPa, then close the hand valve, disconnect the connection between the hand valve and the gas cylinder, and open the hand valve until the pressure in the box is 0.1 MPa. Repeat this process 4 times.

[0061] 3), Inflate the test device for loose flange seals to a predetermined pressure of 0.7 MPa until the pressure is stable.

[0062] 4), Use the helium mass spectrometer leak detector suction gun method to detect leaks. Move the suction gun slowly around the side gap of the flange mating surface and record the test data. (Requirement: leakage rate ≤ 1×10 -5 Pa·m 3 / s)

[0063] 2. Low temperature immersion airtight test:

[0064] Continue the low temperature immersion airtight test on the test device for loose flange seals that has undergone the normal temperature airtight test:

[0065] 1), Place the test device for the loose flange seal to be tested into a low temperature container, as shown below Figure 9 ;

[0066] 2), After the gas in the box cools and shrinks to stability, continue to soak the test piece for 30 min to allow it to cool sufficiently.

[0067] 3) During this period, helium gas was replenished several times to make the gas pressure inside the test piece reach the target pressure of 0.7 MPa and stabilize.

[0068] 4) Take out the test device of the loose flange seal from the liquid nitrogen pool through the handle 112, and use the helium mass spectrometer leak detector suction gun method to detect leaks. Move the suction gun slowly around the side gap of the flange docking surface and record the test data.

[0069] 5) Immediately release the gas after the leak detection is completed.

[0070] 6) Observe the pressure gauge reading and the pressure-bearing capacity of each flange during the leak detection to ensure safety.

[0071] 7) After the test is completed, reinspect the torque of the bolt 5 and record the data.

[0072] 8) Conduct a room temperature airtight reinspection and record the helium mass spectrometer leak rate data.

[0073] 3. High-temperature airtight test:

[0074] For the product that has undergone the room temperature airtight test or the low-temperature airtight test, after reapplying the torque, continue with the high-temperature airtight test.

[0075] The test procedure is as follows:

[0076] 1) Place the product in the high-temperature test chamber and connect the gas charging pipeline.

[0077] 2) Recharge the gas to the target pressure.

[0078] 3) After the gas charging is completed, disconnect the pipeline from the gas cylinder.

[0079] 4) Adjust the high-temperature test chamber to the target temperature, and the temperature rise rate does not exceed 3 °C / min.

[0080] 5) Place it in the high-temperature chamber, then raise the temperature to the target temperature and maintain it for 4 h. Record the pressure sensor reading during this period.

[0081] 6) After the high-temperature test is completed, take out the test piece and conduct an airtightness inspection using the suction gun method, and record the test data.

[0082] 4. Vibration test:

[0083] The product is connected to the hand valve through a metal hose. After the gas charging is completed, close the hand valve. Install the product on the vibration table according to the Figure 10 shown state. The anchor fastening bolts fix the test device of the loose flange seal to the vibration table surface through the fixed holes 315 of the vibration table surface. The hand valve and the sensor are both placed under the table. Apply the vibration conditions in the X / Y / Z directions according to the fixed vibration requirements, and reinspect the room temperature airtightness after the test.

[0084] 5. Long-term gas storage test:

[0085] After the above tests are completed, conduct the long-term storage airtightness test again. The specific process is as follows:

[0086] 1), Replace the sealing gasket again, measure the thickness of the sealing gasket, and confirm that it is within the tolerance range required by the drawing;

[0087] 2), Install the test piece as required and apply the pre-tightening torque of the flange bolts;

[0088] 3), Connect the test device according to the Figure 8 test device diagram shown;

[0089] 4), Conduct the normal temperature airtightness test;

[0090] 5), After the test is completed, release the gas, plug the nozzle, and place it in a dry and clean environment;

[0091] 6), Re-check the normal temperature airtightness test, low-temperature immersion airtightness / high-temperature airtightness test after 60 days, and record the test data.

[0092] After completing the above tests, fully simulate the actual situation on the rocket, comprehensively detect the reliability of the sealing gasket 4 and the flange sealing structure, and provide test data guarantee for installing the sealing structure in the rocket pressurization and delivery system.

[0093] The beneficial effects achieved by this application are as follows:

[0094] (1) In this application, a reinforcing rib structure is added in the upper flange and the lower flange base, and on the basis of maintaining the isobar of the gas container, the cavity or internal cavity volume of the upper flange and the lower flange base is minimized as much as possible to reduce the gas consumption and thus reduce the cost.

[0095] (2) In this application, a reinforcing rib with a cross structure is arranged inside the upper flange and the lower flange base to fully offset the fatigue damage to the top of the test tooling during multiple pressurization processes. And the material is cryogenically cooled with liquid nitrogen for 4 hours at the beginning of material processing to fully release the stress of the material itself. During actual pressurization and low-temperature immersion tests, the material will not deform, avoiding affecting the interpretation of test data.

[0096] (3) In this application, a handle is provided on the upper flange, which is convenient for the upper flange to be lifted and moved for installation, reducing the risk of scratching the sealing surface between the upper flange and the lower flange base. And the upper flange is provided with a knife groove structure. The design of the knife groove is convenient for inserting a flat disassembly tool into the upper flange cover after the test, facilitating the replacement of the sealing gasket. And this knife groove structure does not affect the implementation effect of the tenon and groove sealing structure, which is more conducive to the implementation of the test.

[0097] (4) A test device for a loose flange seal of this application is applicable to multiple tests such as high and low temperature airtightness, normal / low temperature vibration, etc.

[0098] In the description of the present application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0099] In the description of the present application, the phrase "for example" is used to mean "serving as an example, illustration, or explanation". Any embodiment described in the present application as "for example" is not necessarily to be construed as more preferred or advantageous than other embodiments. The following description is given to enable any person skilled in the art to make and use the present invention. In the following description, details are set forth for purposes of explanation. It should be understood that those of ordinary skill in the art can recognize that the present invention can be practiced without these specific details. In other instances, well-known structures and processes are not described in detail so as not to obscure the description of the present invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed in the present application.

[0100] The above description is only for the embodiments of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications and variations can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A test device for a loose flange seal, characterized in that, The test device includes: an upper flange, a loose flange ring, a lower flange base, and a sealing gasket; The upper flange is fixedly connected to the lower flange base through the loose flange ring; The upper flange has an upper flange cavity, and the lower flange base has a lower flange cavity; the upper flange cavity and the lower flange cavity communicate with each other; The upper flange is provided with a vent hole, one end of the vent hole communicates with the upper flange cavity, and the other end is connected with a nozzle; The sealing gasket is sealingly connected to the joint of the upper flange and the lower flange base.

2. The test device for the loop seal flange according to claim 1, characterized in that, The upper flange includes: an upper flange cover, a handle, a reinforcing rib, and a stress platform; The handle is installed on the top of the upper flange cover; The reinforcing rib is fixedly connected inside the upper flange cavity; The stress platform is arranged at the edge of the upper flange cover.

3. The test device for the loop seal flange according to claim 2, characterized in that, The reinforcing rib includes a transverse reinforcing rib and a longitudinal reinforcing rib. The transverse reinforcing rib and the longitudinal reinforcing rib are vertically arranged and form a cross structure. The vent hole is arranged at the intersection of the transverse reinforcing rib and the longitudinal reinforcing rib.

4. The test device for the loop seal flange according to claim 2, characterized in that, A knife groove is arranged on one side of the upper flange close to the lower flange base; The knife groove is located on one side of the stress platform close to the lower flange base.

5. The test device for the loose flange according to claim 2, characterized in that, The loose flange ring is circular; The loose flange ring is sleeved on the edge of the upper flange cover; The loose flange ring presses on the end face of the stress platform on the side away from the lower flange base and is fixedly connected to the lower flange base.

6. The test device for the loop seal flange according to claim 5, characterized in that, A plurality of bolt holes are evenly arranged in the circumferential direction of the loose flange ring; A plurality of lower flange bolt holes are arranged in the circumferential direction of the lower flange base; The lower flange bolt holes correspond to the bolt holes of the loose flange ring one by one, and bolts pass through them.

7. The test device for the loose flange according to claim 1, characterized in that, Lower flange reinforcing ribs are arranged in the lower flange cavity of the lower flange base.

8. The test device for the loop seal flange according to claim 1, characterized in that, A sealing groove is arranged on one side of the lower flange base close to the upper flange; A tenon is arranged on one side of the upper flange close to the lower flange base; The sealing gasket is arranged in the sealing groove, and the tenon presses on one side of the sealing gasket away from the sealing groove.

9. The test device for a loose flange according to claim 1, characterized in that, A plurality of vibration table fixing holes for fixedly connecting with a vibration table are arranged in the circumferential direction of the lower flange base.

10. The test device for the loop seal flange according to claim 4, characterized in that, The side of the knife groove away from the lower flange base is an inclined surface.

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