A high-parameter valve sealing surface multi-working-condition environment simulation test device

Abstract

The application relates to a high-parameter valve sealing surface multi-working-condition environment simulation test device. The device solves the technical problem that the existing test device for integrating thermal, mechanical and chemical multi-field coupling extreme working conditions cannot provide a test environment for high-parameter valve sealing surfaces. The device comprises a profile frame, an atmosphere furnace is arranged in the profile frame, a composite function block for fixing a test sample and loading a molten salt is arranged on the profile frame through a function block mounting mechanism, a lever assembly is arranged above the profile frame, a vertical loading rod is arranged at one end of the lever assembly, a friction assembly in contact with the test sample is arranged on the loading rod, a friction driving mechanism capable of driving the lever assembly to reciprocatingly rub the test sample is arranged on the profile frame, and a torque detection mechanism is arranged between the friction driving mechanism and the lever assembly. The device can provide test conditions close to the actual service environment for high-parameter valve sealing surfaces, and can greatly reduce the cost required by experiments.

Description

Technical Field

[0001] This invention belongs to the technical field of valve testing devices, specifically relating to a high-parameter valve sealing surface multi-condition environment simulation testing device. Background Technology

[0002] High-parameter valves are core components in major engineering fields such as energy and nuclear power. Their sealing surfaces need to operate stably for a long time under extreme service conditions such as high temperature, high pressure, and strong corrosion. For example, the sealing surfaces of regulating valves in supercritical thermal power units not only endure the continuous action of high-temperature and high-pressure steam under supercritical conditions, but also face erosion-corrosion coupling damage caused by impurities carried by the steam. Frequent temperature and pressure fluctuations caused by variable load operation of the unit will generate alternating thermal stress, which can easily induce thermal fatigue. In addition, the high contact pressure stress and frictional wear accompanying frequent opening and closing of valves can easily cause damage and failure of the sealing surfaces due to the coupling of multiple factors. The long-term stability of the sealing surface determines the system safety of the valve.

[0003] Most existing experimental testing devices capable of simultaneously integrating extreme conditions involving multiple fields of thermo-mechanical-chemical coupling cannot provide a testing environment for high-parameter valve sealing surfaces. For example, a friction performance testing device and method in a high-temperature molten salt corrosion environment [202410113220.9] includes: a main frame; a vacuum system; a heating mechanism, which includes: a heating furnace, a molten salt container, and a movable sealing baffle; a driving mechanism, which includes: a drive motor that drives a rotating turntable, and a disc sample fixed to the bottom of the molten salt container; a load control mechanism, which includes: a lifting platform, an X-direction slide, a Z-direction slide, a loading rod connected to the Z-direction slide, and a loading motor, the bottom of which is in contact with the disc sample; and a friction force measurement mechanism, which includes a tangential load sensor mounted on the X-direction slide and a normal load sensor mounted on the Z-direction slide. In this device, the disc sample is completely immersed in the corrosive medium and the corrosion resistance test is conducted under high temperature and friction conditions, which cannot provide a testing environment for high-parameter valve sealing surfaces. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a high-parameter valve sealing surface multi-condition environment simulation test device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-parameter valve sealing surface multi-condition environment simulation test device, comprising a profile frame, an atmosphere furnace with an opening inside the profile frame, a composite functional block located inside the atmosphere furnace and used for fixing the test sample and filling molten salt via a functional block mounting mechanism on the profile frame, a lever assembly vertically movably mounted above the profile frame, a loading rod vertically penetrating the lever assembly and extending toward the composite functional block at one end of the lever assembly, a friction assembly extending into the composite functional block and contacting the test sample on the loading rod, and a mechanism on the profile frame capable of driving the lever assembly to reciprocate laterally along the profile frame, thereby causing the friction assembly to reciprocate. The friction drive mechanism for rubbing the test sample includes a torque detection mechanism between the friction drive mechanism and the lever assembly. The test sample is placed inside a composite functional block, which is installed inside an atmosphere furnace via a functional block mounting mechanism. The atmosphere furnace provides a high-temperature field for the test sample, accurately replicating the service temperature conditions above 300°C in nuclear power and supercritical thermal power scenarios, thus improving the testing effect. The lever assembly applies a load to the test sample via a loading rod, and the friction assembly on the loading rod rubs the surface of the test sample. The friction drive mechanism performs reciprocating sliding friction on the surface of the test sample, and the torque detection mechanism transmits signals to facilitate real-time monitoring of the stress and strain on the surface of the test sample.

[0006] In the aforementioned high-parameter valve sealing surface multi-condition environment simulation test device, the composite functional block includes a cylindrical upper ceramic block and a square lower ceramic block. The upper ceramic block has a square through-hole on its inner side for placing high-temperature molten salt. One end of the lower ceramic block has a square recess to accommodate one end of the upper ceramic block, and the square recess contains a stud threadedly connected to the upper ceramic block. The stud has a square notch at its center that abuts against the square through-hole and is used to fix the test sample. The square notch facilitates the placement of the test sample, ensuring that only the sample surface is exposed. The square through-hole serves as a molten salt placement cavity, where the molten salt is placed. The bore forms a corrosive environment at high temperatures, which can accurately replicate the actual working conditions of the high-parameter valve sealing surface, where only the test surface interacts with the corrosive medium, thus improving the test results. The lower inner side of the upper ceramic block has an upper ceramic block mounting hole that is connected to the square notch and fitted onto the outside of the stud. The upper ceramic block mounting hole has an internal thread in the circumference, and the internal thread engages with the external thread on the outer side of the stud, so that the square through hole is tightly pressed against the square notch. The size of the square through hole is smaller than that of the square notch. The internal and external threads can ensure the thread engagement and sealing effect between the upper ceramic block mounting hole and the stud, which can strictly isolate the corrosive medium from the non-test surface of the sample, thus improving the test results.

[0007] In the aforementioned high-parameter valve sealing surface multi-condition environment simulation test device, the atmosphere furnace is equipped with a sealing cover capable of sealing the opening. One side of the sealing cover has an insulation layer, and the insulation layer has a sealing installation notch that abuts against the functional block mounting mechanism. The sealing cover also has a square air outlet corresponding to a square through-hole, and one side of the square air outlet has an air inlet connected to the inner cavity of the atmosphere furnace. An air inlet bottle is mounted on the profile frame, and the air inlet bottle has a vent pipe connected to the air inlet. The loading rod extends through a square vent and is positioned within a square through-hole. The loading rod is reciprocated within the square vent via a friction drive mechanism. The inlet is circular and sized to match the vent pipe. A sealing cap seals the opening, and an insulation layer enhances the sealing effect, ensuring effective air intake through the inlet of the gas cylinder into the square through-hole. The gas cylinder contains argon gas. Molten salt requires isolation from air and water vapor during use. Argon gas entering the square through-hole isolates the molten salt from air and water vapor, ensuring its stability during use.

[0008] In the aforementioned high-parameter valve sealing surface multi-condition environment simulation test device, the functional block mounting mechanism includes a clamping body disposed within a profile frame and extending to the inner side of the atmosphere furnace. The clamping body has two symmetrically arranged clamping bending portions connected to both sides of the profile frame. The composite functional block is disposed between the two clamping bending portions via a functional block mounting assembly. The clamping bending portions facilitate the clamping body to be fixedly mounted on the profile frame, ensuring the installation stability of the composite functional block. Furthermore, the functional block mounting assembly facilitates the fixed mounting of the composite functional block on the clamping body, making it easier to position and place the composite functional block, thereby improving testing efficiency.

[0009] In the above-mentioned high-parameter valve sealing surface multi-condition environment simulation test device, the functional block installation assembly includes a functional block fixing part that is set at one end of the two clamp bending parts and bent downwards. The clamp bending parts and the functional block fixing parts are connected in a T-shape, and the functional block fixing part is fixed to the lower ceramic block by bolts. The functional block fixing part can facilitate the positioning and placement of the composite functional block, and ensure the installation stability of the composite functional block on the functional block fixing part.

[0010] In the aforementioned high-parameter valve sealing surface multi-condition environment simulation test device, the loading rod includes a steel rod and a ceramic rod coaxially connected. The steel rod is connected to the ceramic rod by a threaded connection. The friction assembly includes a ceramic nut connected to the end of the ceramic rod away from the steel rod by a threaded connection. The end of the ceramic nut away from the ceramic rod has a through hole. A ceramic ball with its outer side exposed in the through hole is provided inside the ceramic nut. The combination of the steel rod and the ceramic rod enables the loading rod to have both strength and high-temperature resistance. The ceramic ball can be set inside the ceramic nut through the through hole. The ceramic ball is a Si3N4 ceramic ball, which has the advantages of high strength and high temperature resistance.

[0011] In the aforementioned high-parameter valve sealing surface multi-condition environment simulation test device, the lever assembly includes a lever body longitudinally movably mounted above the profile frame. The middle part of the lever body is mounted on the upper fixed plate via a lever movable mounting mechanism. One end face of the lever body has an axially arranged threaded hole, and an adjusting bolt with an adjusting nut is provided in the threaded hole. The other end of the lever body has a vertically penetrating circular through hole. The upper end of the loading rod passes through the circular through hole, and a weight located on the upper side of the lever body is provided at the upper end of the rod via a limiting nut. A weight is provided at one end of the lever body along the lever body axis. The lever body has an extended slit, one end of which is connected to a circular through hole and the other end extends to the end of the lever body. A locking hole is provided on the outside of the lever body, penetrating the slit, and a locking bolt is provided in the locking hole. The slit and the circular through hole facilitate the mounting of the loading rod on the lever body, and the locking hole and the locking bolt facilitate the fixing of the loading rod on the lever body, ensuring a locking effect. The limiting nut facilitates the mounting of the weight on the steel rod, which provides a constant normal load and allows for easy replacement and adjustment of the weight. This load is transferred to the test sample surface through the loading rod, ensuring the mechanical strength of the test.

[0012] In the aforementioned high-parameter valve sealing surface multi-condition environment simulation test device, the lever movable installation mechanism includes a central through hole located in the middle of the lever body and extending laterally through the lever body. A drive shaft passes through the central through hole, and both ends of the drive shaft are respectively driven and mounted on bearing seats on both sides of the upper fixed plate via bearing bodies. The middle of the lever body has a vertical mounting hole that passes through the lever body and the central through hole, and the mounting hole is threaded with a mounting bolt that passes through the drive shaft. The central through hole facilitates the placement of the drive shaft, the drive shaft facilitates the movement control of the lever body, the bearing seats facilitate the installation of the bearing bodies, and the bearing bodies improve the transmission stability and transmission smoothness. The mounting hole and mounting bolt facilitate the fixation of the lever body on the upper fixed plate.

[0013] In the aforementioned high-parameter valve sealing surface multi-condition environment simulation test device, the friction drive mechanism includes a slide rail disposed on the upper end of the profile frame and arranged laterally along the profile frame. A slider is slidably mounted on the slide rail. The slider is connected to a reducer via a screw thread transmission assembly. The reducer is connected to a motor, and the motor is connected to a driver via a controller. The slider is connected to a lever assembly via the aforementioned torque detection mechanism. The slider can be slidably mounted on the slide rail via the screw thread transmission assembly, and the motor and reducer can drive the screw thread transmission assembly. The controller and driver facilitate user control of the motor. The slider has a travel range of 500mm, and the motor can control the slider to reciprocate at a speed of 40mm / s, which can simulate the reciprocating sliding friction of the test sample surface during the valve opening and closing process, thereby improving the test effect.

[0014] In the aforementioned high-parameter valve sealing surface multi-condition environment simulation test device, the torque detection mechanism includes a positioning plate set on the upper end of the slider. The upper fixed plate and the positioning plate are correspondingly set on the upper and lower sides, and the upper fixed plate and the positioning plate are equipped with torque sensors. The torque sensors are cylindrical, and the bottom of the torque sensors is connected to the computer through a transmitter. The lever assembly is set on the slider through the upper fixed plate and the positioning plate. The torque sensor can convert the sensed torque into an electrical signal, and the signal is transmitted to the computer through the transmitter, which facilitates the user to monitor the stress and strain of the test sample surface in real time.

[0015] Compared with existing technologies, the advantages of this invention are:

[0016] 1. The atmosphere furnace can provide a high-temperature field for the test sample. By placing molten salt in the square through hole, a corrosive environment can be formed at high temperature. Furthermore, the friction drive mechanism and friction components can simulate the reciprocating sliding friction of the test sample surface during the valve opening and closing process. This can provide test conditions for high-parameter valve sealing surfaces that are close to the actual service environment, which can greatly reduce the cost of experiments.

[0017] 2. The atmosphere furnace facilitates temperature control, the weights facilitate load control and adjustment of the friction components, and the friction drive mechanism facilitates speed adjustment of reciprocating motion, thereby improving adjustment efficiency and ensuring testing efficiency.

[0018] 3. The torque detection mechanism allows users to monitor the stress and strain of the test sample surface in real time, facilitating user control and adjustment of the device and ensuring test results.

[0019] 4. The sealing cap and gas inlet can allow argon gas to enter the square through-hole, isolating the molten salt from air and water vapor, thus ensuring the stability of the molten salt during use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a partially enlarged structural schematic diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the atmosphere furnace in this invention;

[0023] Figure 4 This is a schematic diagram of the functional block mounting mechanism in this invention;

[0024] Figure 5 This is an exploded view of the composite functional block in this invention;

[0025] Figure 6 This is a schematic diagram of the lever assembly in this invention;

[0026] Figure 7 This is an exploded view of the lever assembly in this invention.

[0027] In the diagram: 1. Profile frame; 2. Atmosphere furnace; 21. Opening; 22. Sealing cover; 23. Insulation layer; 231. Sealing installation notch; 24. Square air outlet; 25. Air inlet; 26. Air inlet bottle; 27. Vent pipe; 3. Functional block mounting mechanism; 31. Clamp body; 32. Clamp bending part; 33. Functional block mounting assembly; 33. Functional block fixing part; 331. Composite functional block; 4. Upper ceramic block; 41. Square through hole; 411. Upper ceramic block mounting hole; 412. Internal thread; 413. Lower ceramic block; 42. Square notch; 421. Stud; 422. Square notch; 423. External thread; 424. Lever assembly; 5. Lever body; 51. Threaded hole; 511. Circular through hole; 512. Gap; 513. Locking hole; 51 4. Locking bolt 515, lever movable mounting mechanism 52, center through hole 521, drive shaft 522, bearing body 523, bearing seat 524, mounting hole 525, mounting bolt 526, upper fixing plate 53, adjusting nut 54, adjusting bolt 55, limit nut 56, weight 57, loading rod 6, steel rod 61, ceramic rod 62, friction assembly 7, ceramic nut 71, through hole 72, ceramic ball 73, friction drive mechanism 8, slide rail 81, slider 82, lead screw and threaded sleeve transmission assembly 83, reducer 84, motor 85, controller 86, driver 87, torque detection mechanism 9, positioning plate 91, torque sensor 92, transmitter 93, computer 94. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, a high-parameter valve sealing surface multi-condition environment simulation test device includes a profile frame 1, an atmosphere furnace 2 with an opening 21 inside the profile frame 1, a composite functional block 4 located inside the atmosphere furnace 2 and used for fixing the test sample and filling molten salt via a functional block mounting mechanism 3 on the profile frame 1, a lever assembly 5 is longitudinally movably mounted above the profile frame 1, a loading rod 6 is vertically inserted through the lever assembly 5 and extends toward the composite functional block 4 at one end, a friction assembly 7 is mounted on the loading rod 6 extending into the composite functional block 4 and contacting the test sample, and a friction drive mechanism 8 is mounted on the profile frame 1 to drive the lever assembly 5 to move laterally back and forth along the profile frame 1, thereby causing the friction assembly 7 to reciprocate against the test sample. Furthermore, a torque detection mechanism 9 is provided between the friction drive mechanism 8 and the lever assembly 5. The test sample is placed inside the composite functional block 4, which is installed inside the atmosphere furnace 2 via the functional block mounting mechanism 3. The atmosphere furnace 2 can provide a high-temperature field for the test sample, accurately reproducing the service temperature conditions above 300°C in nuclear power and supercritical thermal power scenarios, thereby improving the test effect. The lever assembly 5 can apply a load to the test sample via the loading rod 6, and the friction assembly 7 on the loading rod 6 can rub the surface of the test sample. The friction drive mechanism 8 can perform reciprocating sliding friction on the surface of the test sample, and the torque detection mechanism 9 can transmit signals to facilitate real-time monitoring of the stress and strain on the surface of the test sample by the user.

[0030] Specifically, the composite functional block 4 includes a cylindrical upper ceramic block 41 and a square lower ceramic block 42. The upper ceramic block 41 has a square through-hole 411 on its inner side for holding high-temperature molten salt. One end of the lower ceramic block 42 has a square recess 421 to accommodate one end of the upper ceramic block 41. The square recess 421 contains a stud 422 threadedly connected to the upper ceramic block 41. The stud 422 has a square notch 423 at its center, abutting against the square through-hole 411 and used to fix the test sample. The square notch 423 facilitates the placement of the test sample, ensuring that only the sample surface is exposed. The square through-hole 411 serves as a molten salt placement cavity. Molten salt placed within the square through-hole 411 forms a corrosive environment at high temperature, enabling precise... The high-parameter valve sealing surface is precisely replicated under the actual working conditions of the test surface interacting with the corrosive medium, thus improving the test results. The inner side of the lower end of the upper ceramic block 41 has an upper ceramic block mounting hole 412 that is connected to the square notch 423 and sleeved on the outside of the stud 422. The upper ceramic block mounting hole 412 is provided with an internal thread 413 around its circumference, and the internal thread 413 meshes with the external thread 424 around the stud 422, so that the square through hole 411 is tightly pressed against the square notch 423. The size of the square through hole 411 is smaller than that of the square notch 423. The internal thread 413 and the external thread 424 can ensure the threaded meshing sealing effect between the upper ceramic block mounting hole 412 and the stud 422, which can strictly isolate the corrosive medium from the non-test surface of the sample and improve the test results.

[0031] The atmosphere furnace 2 is equipped with a sealing cover 22 that can close the opening 21. An insulation layer 23, made of asbestos, is provided on one side of the sealing cover 22. This insulation layer improves heat insulation and reduces heat loss within the atmosphere furnace 2. The insulation layer 23 has a sealing installation notch 231 that abuts against the functional block mounting mechanism 3. This notch facilitates the sealing and sealing between the sealing cover 22 and the functional block mounting mechanism 3, ensuring proper air intake. The sealing cover 22 also has a square air outlet 24 corresponding to the square through hole 411. An air inlet 25 is located on one side of the square air outlet 24 and communicates with the inner cavity of the atmosphere furnace 2. An air inlet bottle 26 is provided on the profile frame 1 for air intake. Bottle 26 is provided with a vent pipe 27 connected to the vent 25. Loading rod 6 extends through square vent 24 and is installed in square through hole 411. Loading rod 6 is reciprocated in square vent 24 by friction drive mechanism 8. Vent 25 is circular and fits the size of vent pipe 27. Opening 21 can be sealed by sealing cap 22 and the sealing effect can be improved by heat insulation layer 23. This ensures the air intake effect of gas bottle 26 through vent 25 into square through hole 411. The gas bottle 26 contains argon gas. Molten salt needs to be isolated from air and water vapor during use. Argon gas enters square through hole 411 to isolate molten salt from air and water vapor, which can ensure the stability of molten salt during use.

[0032] like Figure 2 , Figure 4 , Figure 6 , Figure 7 As shown, the functional block mounting mechanism 3 includes a clamping body 31 disposed within the profile frame 1 and extending to the inner side of the atmosphere furnace 2. The clamping body 31 has two symmetrically arranged clamping bending portions 32 connected to both sides of the profile frame 1. The composite functional block 4 is disposed between the two clamping bending portions 32 via the functional block mounting assembly 33. The clamping bending portions 32 facilitate the fixing of the clamping body 31 onto the profile frame 1, ensuring the installation stability of the composite functional block 4. Furthermore, the functional block mounting assembly 33 facilitates the fixing of the composite functional block 4 onto the clamping body 31, making it easier to position and place the composite functional block 4, thereby improving testing efficiency.

[0033] Furthermore, the functional block mounting assembly 33 includes a functional block fixing part 331 that is disposed at one end of the two clamp bending parts 32 and bent downward. The clamp bending parts 32 and the functional block fixing part 331 are connected in a T-shape, and the functional block fixing part 331 is fixed to the lower ceramic block 42 by bolts. The functional block fixing part 331 facilitates the positioning and placement of the composite functional block 4, ensuring the installation stability of the composite functional block 4 on the functional block fixing part 331.

[0034] The loading rod 6 includes a steel rod 61 and a ceramic rod 62 coaxially connected. The steel rod 61 is connected to the ceramic rod 62 by a threaded connection. The friction assembly 7 includes a ceramic nut 71 connected to the end of the ceramic rod 62 away from the steel rod 61 by a threaded connection. The end of the ceramic nut 71 away from the ceramic rod 62 has a through hole 72. A ceramic ball 73 is provided inside the ceramic nut 71 with its outer side exposed outside the through hole 72. The combination of the steel rod 61 and the ceramic rod 62 enables the loading rod 6 to have both strength and high temperature resistance. The ceramic ball 73 can be set inside the ceramic nut 71 through the through hole 72. The ceramic ball 73 is a Si3N4 ceramic ball with the advantages of high strength and high temperature resistance.

[0035] Combination Figure 2 , Figure 6 , Figure 7As shown, the lever assembly 5 includes a lever body 51 longitudinally movably mounted above the profile frame 1. The middle part of the lever body 51 is mounted on the upper fixed plate 53 via a lever movable mounting mechanism 52. The lever body 51 is movably mounted on the profile frame 1 via the lever movable mounting mechanism 52. One end face of the lever body 51 has an axially arranged threaded hole 511, and an adjusting bolt 55 with an adjusting nut 54 is provided in the threaded hole 511. The force balance of the lever body 51 in the initial state can be adjusted by the adjusting nut 54 and the adjusting bolt 55. The other end of the lever body 51 has a circular through hole 512 that vertically penetrates the lever body 51. The upper end of the steel rod 61 of the loading rod 6 passes through the circular through hole 512, and a weight 57 located on the upper side of the lever body 51 is provided on the upper end of the steel rod 61 via a limiting nut 56. One end is provided with a slit 513 extending axially along the lever body 51. One end of the slit 513 is connected to a circular through hole 512 and the other end extends to the end of the lever body 51. A locking hole 514 is provided on the outside of the lever body 51, penetrating the slit 513. A locking bolt 515 is provided in the locking hole 514. The slit 513 and the circular through hole 512 facilitate the mounting of the loading rod 6 on the lever body 51. The locking hole 514 and the locking bolt 515 facilitate the fixing of the loading rod 6 on the lever body 51, ensuring a locking effect. The limiting nut 56 facilitates the mounting of the weight 57 on the steel rod 61. The weight 57 provides a constant normal load and facilitates the replacement and adjustment of the weight 57. This load is transmitted to the test sample surface through the loading rod 6 to ensure the test mechanical strength.

[0036] The lever mounting mechanism 52 includes a central through hole 521 located in the middle of the lever body 51 and extending laterally through the lever body 51. A drive shaft 522 passes through the central through hole 521. Both ends of the drive shaft 522 are mounted on bearing seats 524 on both sides of the upper fixed plate 53 via bearing bodies 523. The middle of the lever body 51 has a mounting hole 525 that extends vertically through the lever body 51 and the central through hole 521. A mounting bolt 526 is threaded into the mounting hole 525 and passes through the drive shaft 522. The central through hole 521 facilitates the placement of the drive shaft 522, the drive shaft 522 facilitates the movement control of the lever body 51, the bearing seats 524 facilitate the installation of the bearing body 523, and the bearing body 523 improves the transmission stability and smoothness. The mounting hole 525 and the mounting bolt 526 facilitate the fixing of the lever body 51 onto the upper fixed plate 53.

[0037] Specifically, the friction drive mechanism 8 includes a slide rail 81 disposed on the upper end of the profile frame 1 and arranged laterally along the profile frame 1. A slider 82 is slidably disposed on the slide rail 81. The slider 82 is connected to a reducer 84 through a screw thread transmission assembly 83. The reducer 84 is connected to a motor 85, and the motor 85 is connected to a driver 87 through a controller 86. The slider 82 is connected to the lever assembly 5 through the aforementioned torque detection mechanism 9. The slider 82 can be slidably disposed on the slide rail 81 through the screw thread transmission assembly 83, and the screw thread transmission assembly 83 can be driven by the motor 85 and the reducer 84. The controller 86 and the driver 87 facilitate user control of the motor 85. The slider 82 has a movable stroke of 500mm, and the motor 85 can control the slider 82 to reciprocate at a speed of 40mm / s, which can simulate the reciprocating sliding friction of the test sample surface during the valve opening and closing process, thereby improving the test effect.

[0038] Combination Figure 6 , Figure 7 As shown, the torque detection mechanism 9 includes a positioning plate 91 set on the upper end of the slider 82, an upper fixing plate 53 and a positioning plate 91 set correspondingly on the upper and lower sides, and a torque sensor 92 is provided on the upper fixing plate 53 and the positioning plate 91. The torque sensor 92 is cylindrical and its bottom is connected to the computer 94 through a transmitter 93. The lever assembly 5 is set on the slider 82 through the upper fixing plate 53 and the positioning plate 91. The torque sensor 92 can convert the sensed torque into an electrical signal and transmit the signal to the computer 94 through the transmitter 93, so that the user can monitor the stress and strain of the test sample surface in real time.

[0039] The principle of this embodiment is as follows: The atmosphere furnace 2 provides a stable high-temperature field for the test sample, accurately replicating the service temperature conditions above 300℃ under nuclear power and supercritical thermal power scenarios. The test sample is placed inside the composite functional block 4, which is mounted inside the atmosphere furnace 2 via the functional block mounting mechanism 3. The test sample is placed inside the square notch 423, and the ceramic block mounting hole 412 and the stud 422 are connected by a threaded engagement, ensuring rigid fixation and sealing. This strictly isolates the corrosive medium from the non-test surface of the sample, improving the testing effect. The square through hole 411 forms a molten salt containment cavity, where the filled molten salt creates a corrosive environment at high temperatures, accurately replicating the high-parameter valve sealing surface, with only the test surface in contact with the corrosive medium. To improve the testing effect under actual working conditions, argon gas is introduced into the square through-hole 411 for two minutes after the molten salt is filled and before its use. The argon gas isolates the molten salt from air and water vapor in the square through-hole 411, ensuring the stability of the molten salt during use. The argon gas can be discharged through the square vent hole 24. The lever assembly 5 provides a constant normal load through the weight 57, which is transmitted to the test sample surface through the loading rod 6 to ensure the mechanical strength of the friction assembly 7 on the test sample surface. The friction drive mechanism 8 can drive the lever assembly 5 and the loading rod 6 to reciprocate at a set speed. The friction assembly 7 can simulate the reciprocating sliding friction during the opening and closing of a valve on the test sample surface, maintaining the testing effect. Finally, the transmitter 93 transmits the signal received by the torque sensor 92 to the computer 94, and combined with the analysis software, monitors the stress and strain of the test sample surface in real time.

[0040] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0041] Although this article extensively uses the following components: profile frame 1, atmosphere furnace 2, opening 21, sealing cover 22, insulation layer 23, sealing installation notch 231, square air outlet 24, air inlet 25, air inlet bottle 26, vent pipe 27, functional block mounting mechanism 3, clamp body 31, clamp bending part 32, functional block mounting assembly 33, functional block fixing part 331, composite functional block 4, upper ceramic block 41, square through hole 411, upper ceramic block mounting hole 412, internal thread 413, lower ceramic block 42, square notch 421, stud 422, square notch 423, external thread 424, lever assembly 5, lever body 51, threaded hole 511, circular through hole 512, gap 513, locking hole 514, locking bolt The terms used include: 515, lever-moving mounting mechanism; 52, center through hole; 521, drive shaft; 522, bearing body; 523, bearing seat; 524, mounting hole; 525, mounting bolt; 526, upper fixing plate; 53, adjusting nut; 54, adjusting bolt; 55, limit nut; 56, weight; 57, loading rod; 6, steel rod; 61, ceramic rod; 62, friction assembly; 7, ceramic nut; 71, through hole; 72, ceramic ball; 73, friction drive mechanism; 8, slide rail; 81, slider; 82, lead screw and threaded sleeve transmission assembly; 83, reducer; 84, motor; 85, controller; 86, driver; 87, torque detection mechanism; 9, positioning plate; 91, torque sensor; 92, transmitter; 93, computer, etc., but the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A high-parameter valve sealing surface multi-condition environment simulation test device, comprising a profile frame (1), wherein the profile frame (1) is provided with an atmosphere furnace (2) having an opening (21), characterized in that, The profile frame (1) is provided with a composite functional block (4) located in the atmosphere furnace (2) and used to fix the test sample and fill molten salt via a functional block mounting mechanism (3). A lever assembly (5) is provided vertically above the profile frame (1). A loading rod (6) is provided at one end of the lever assembly (5) and extends vertically through the lever assembly (5) toward the composite functional block (4). A friction assembly (7) is provided on the loading rod (6) and extends into the composite functional block (4) and contacts the test sample. A friction drive mechanism (8) is provided on the profile frame (1) to drive the lever assembly (5) to move laterally along the profile frame (1) so that the friction assembly (7) rubs the test sample back and forth. A torque detection mechanism (9) is provided between the friction drive mechanism (8) and the lever assembly (5).

2. The high-parameter valve sealing surface multi-condition environment simulation test device according to claim 1, characterized in that, The composite functional block (4) includes a cylindrical upper ceramic block (41) and a square lower ceramic block (42). The upper ceramic block (41) has a square through hole (411) for placing high-temperature molten salt on its inner side at the upper end. The lower ceramic block (42) has a square notch (421) at one end to accommodate one end of the upper ceramic block (41). The square notch (421) has a stud (422) that is threadedly connected to the upper ceramic block (41). The stud (422) has a center that abuts against the square through hole (411) and is used for... The square notch (423) of the sample to be tested is fixed. The lower inner side of the upper ceramic block (41) has an upper ceramic block mounting hole (412) that is connected to the square notch (423) and sleeved on the outside of the stud (422). The upper ceramic block mounting hole (412) is provided with an internal thread (413) in the circumferential direction. The internal thread (413) meshes with the external thread (424) on the outer side of the stud (422) in the circumferential direction, so that the square through hole (411) is pressed tightly against the square notch (423). The size of the square through hole (411) is smaller than that of the square notch (423).

3. The high-parameter valve sealing surface multi-condition environment simulation test device according to claim 2, characterized in that, The atmosphere furnace (2) is provided with a sealing cover (22) that can close the opening (21). The sealing cover (22) is provided with a heat insulation layer (23) on one side. The heat insulation layer (23) is provided with a sealing installation notch (231) that abuts against the functional block installation mechanism (3). The sealing cover (22) is provided with a square air outlet (24) that corresponds to the square through hole (411). The square air outlet (24) is provided with an air inlet (25) on one side. The air inlet (25) is connected to the inner cavity of the atmosphere furnace (2). The profile frame (1) is provided with an air inlet bottle (26). The air inlet bottle (26) is provided with a vent pipe (27) that is connected to the air inlet (25).

4. The high-parameter valve sealing surface multi-condition environment simulation test device according to claim 2, characterized in that, The functional block mounting mechanism (3) includes a clamping body (31) disposed inside the profile frame (1) and extending to the inside of the atmosphere furnace (2). The clamping body (31) has two symmetrically arranged clamping bending portions (32) connected to both sides of the profile frame (1). The composite functional block (4) is disposed between the two clamping bending portions (32) through the functional block mounting assembly (33).

5. The high-parameter valve sealing surface multi-condition environment simulation test device according to claim 4, characterized in that, The functional block mounting assembly (33) includes a functional block fixing part (331) that is set at one end of the two clamp bending parts (32) and bent downward. The clamp bending parts (32) and the functional block fixing part (331) are connected in a T-shape, and the functional block fixing part (331) is fixed to the lower ceramic block (42) by bolts.

6. The high-parameter valve sealing surface multi-condition environment simulation test device according to claim 1, characterized in that, The loading rod (6) includes a steel rod (61) and a ceramic rod (62) coaxially connected. The steel rod (61) is connected to the ceramic rod (62) by a threaded connection. The friction assembly (7) includes a ceramic nut (71) connected to the end of the ceramic rod (62) away from the steel rod (61) by a threaded connection. The end of the ceramic nut (71) away from the ceramic rod (62) has a through hole (72). A ceramic ball (73) with its outer side exposed in the through hole (72) is provided inside the ceramic nut (71).

7. The high-parameter valve sealing surface multi-condition environment simulation test device according to claim 6, characterized in that, The lever assembly (5) includes a lever body (51) longitudinally movably mounted above the profile frame (1). The middle part of the lever body (51) is mounted on the upper fixed plate (53) via a lever movable mounting mechanism (52). One end face of the lever body (51) has an axially arranged threaded hole (511) and an adjusting bolt (55) with an adjusting nut (54) is provided in the threaded hole (511). The other end of the lever body (51) has a circular through hole (512) that vertically penetrates the lever body (51). The steel rod of the loading rod (6) ( 61) The upper end is inserted into the circular through hole (512) and a weight (57) is provided on the upper side of the lever body (51) through the limiting nut (56) at the upper end of the steel rod (61). A gap (513) is provided at one end of the lever body (51) extending along the axial direction of the lever body (51). One end of the gap (513) is connected to the circular through hole (512) and the other end extends to the end of the lever body (51). A locking hole (514) is provided on the outside of the lever body (51) through the gap (513), and a locking bolt (515) is provided in the locking hole (514).

8. The high-parameter valve sealing surface multi-condition environment simulation test device according to claim 7, characterized in that, The lever movable mounting mechanism (52) includes a central through hole (521) located in the middle of the lever body (51) and extending laterally through the lever body (51). A drive shaft (522) is installed inside the central through hole (521). Both ends of the drive shaft (522) are driven and mounted on bearing seats (524) on both sides of the upper fixed plate (53) via bearing bodies (523). The middle of the lever body (51) is provided with a mounting hole (525) that extends vertically through the lever body (51) and the central through hole (521). A mounting bolt (526) that passes through the drive shaft (522) is threaded into the mounting hole (525).

9. The high-parameter valve sealing surface multi-condition environment simulation test device according to claim 7, characterized in that, The friction drive mechanism (8) includes a slide rail (81) arranged on the upper end of the profile frame (1) and arranged laterally along the profile frame (1). A slider (82) is slidably arranged on the slide rail (81). The slider (82) is connected to the reducer (84) through the screw thread transmission assembly (83). The reducer (84) is connected to the motor (85). The motor (85) is connected to the driver (87) through the controller (86). The slider (82) is connected to the lever assembly (5) through the torque detection mechanism (9).

10. The high-parameter valve sealing surface multi-condition environment simulation test device according to claim 9, characterized in that, The torque detection mechanism (9) includes a positioning plate (91) set on the upper end of the slider (82), the upper fixing plate (53) and the positioning plate (91) are arranged correspondingly on the upper and lower sides, and the upper fixing plate (53) and the positioning plate (91) are provided with torque sensors (92). The torque sensors (92) are cylindrical, and the bottom of the torque sensors (92) is connected to the computer (94) through a transmitter (93).

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