Device, system and method for hydrostatic test of throttling assembly

Abstract

The invention provides a device, a system and a method for a hydrostatic test of a throttling assembly, belongs to the technical field of pressure vessel testing, and aims to solve the problems of difficulty in sealing and low efficiency when the hydrostatic test is performed on the throttling assembly with a sharp end face, the device comprises an upper sealing assembly and a lower sealing assembly which jointly define a test chamber; the fastening component is used for clamping the assembly; the supporting and transferring assembly is arranged on the lower sealing assembly and used for supporting the step face in the throttling assembly, and therefore the sealing acting face is transferred to the inner step face from the sharp end face of the assembly, and reliable sealing is achieved. The invention also provides a test system comprising the device and a corresponding hydrostatic test method. Through an innovative sealing surface transfer mode, the sealing problem is fundamentally solved, and the test reliability is improved; and meanwhile, the batch test efficiency is remarkably improved through the multi-station and series connection design, and the industrial application value is good.

Description

Technical Field

[0001] This invention relates to the field of pressure vessel testing technology, specifically to an apparatus, system, and method for hydrostatic testing of throttling components, and more particularly to an apparatus for hydrostatic testing of throttling components in high-temperature reactor evaporators. Background Technology

[0002] High-temperature gas-cooled reactors represent an important development direction for advanced nuclear energy systems. The feedwater inlet throttling assembly in the steam generator, a core component of the reactor, is crucial for its safe operation. According to relevant technical specifications, the welds of these throttling assemblies must undergo rigorous hydrostatic testing to verify their structural integrity and pressure-bearing capacity.

[0003] However, in actual production and quality inspection, conducting hydrostatic tests on this throttling component faces technical challenges. First, the throttling component has a unique structure; one end is typically designed with a sharp or thin-walled structure. When high pressure is applied for sealing, conventional flat sealing gaskets are easily cut into or damaged by its sharp end face, leading to seal failure and making the test impossible or the results unreliable. Second, as mass-produced parts, the throttling components are produced in large quantities, making traditional single-piece testing methods extremely inefficient and completely unable to meet the requirements of project schedule and cost control. Although some existing technologies exist for multi-path or batch testing pipeline systems that can simultaneously test multiple throttling components to improve efficiency, these existing solutions are usually designed for general-purpose components and do not provide reliable sealing solutions for the aforementioned special structural components with sharp end faces. This results in persistent sealing difficulties and poor test reliability in practical applications, failing to fundamentally solve the problem. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the purpose of this invention is to provide an apparatus, system and method for hydrostatic testing of throttling components.

[0005] According to the present invention, an apparatus for hydrostatic testing of a throttling component is provided, wherein the throttling component has a sharp end face and a stepped surface inside, comprising: An upper sealing assembly and a lower sealing assembly, wherein the upper sealing assembly and / or the lower sealing assembly are provided with sealing surfaces, the upper sealing assembly and the lower sealing assembly are disposed opposite to each other, and together define one or more test chambers for accommodating the throttling component; Fastening components for detachably clamping the upper sealing assembly and the lower sealing assembly; and A support transfer assembly is disposed on the lower sealing assembly and adapted to mate with one side of the sharp end face of the throttling assembly. The support transfer assembly is used to support the stepped surface inside the throttling assembly, so that the stepped surface mates with the sealing surface to form a seal in place of the sharp end face.

[0006] Preferably, the support transfer component is a pillar, which is fixed on the lower sealing assembly, and one end of the pillar is used to support the stepped surface inside the throttling component.

[0007] Preferably, the upper sealing assembly includes an upper fixing seat and an upper cover, and the lower sealing assembly includes a lower fixing seat and a lower cover; at least one of the upper fixing seat and the lower fixing seat has a sealing surface, which is used to cooperate with the stepped surface inside the throttling component to form a seal.

[0008] Preferably, at least one of the sealing surfaces of the upper fixed seat and the lower fixed seat is formed by post-weld machining.

[0009] Preferably, the fastening assembly includes a plurality of pull rods passing through the upper and lower sealing assemblies, and nuts cooperating with the pull rods.

[0010] Preferably, the upper sealing assembly is provided with an exhaust port, and the lower sealing assembly is provided with a water inlet.

[0011] Preferably, the water inlet and exhaust outlet of the device are adapted to be connected in series with corresponding outlets of other identical devices.

[0012] The present invention also provides a hydrostatic testing system, comprising: At least one of the aforementioned devices; and A fluid circuit connected to the inlet and outlet of the device, the fluid circuit including a pump source for providing high-pressure fluid.

[0013] The present invention also provides a method for hydrostatic testing of a throttling component using the above-described device, wherein the throttling component has a sharp end face and a stepped surface inside, comprising the following steps: The throttling component is housed within the test chamber of the device, and the support transfer component of the device supports the stepped surface inside the throttling component; The upper and lower sealing assemblies are clamped by the fastening components of the device, thereby causing the stepped surface to mate with the sealing surface of the device to form a seal; and Pressurized fluid is injected into the test chamber.

[0014] Preferably, the water pressure test method for the throttling components includes: simultaneously performing water pressure tests on multiple throttling components, or connecting multiple devices in series and performing water pressure tests synchronously.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up a support transfer component, the sealing surface is transferred from the easily damaged sharp end face of the throttling component to the step surface with higher internal strength, which effectively avoids the sealing gasket being damaged, fundamentally solves the problem of sealing failure, and significantly improves the reliability and safety of high-pressure water pressure test.

[0016] 2. The device of the present invention adopts a multi-station integrated design, which can complete the clamping and testing of multiple throttling components at one time. Furthermore, multiple devices can also work in series. Compared with the traditional single-piece testing method, the testing efficiency is improved by several times, which can meet the needs of large-scale, fast-paced production inspection.

[0017] 3. The device of the present invention has a simple and stable overall structure, consisting of standard or easily processed parts such as a fixed base, cover plate, and pull rod. It has low manufacturing cost, is easy and quick to assemble and disassemble, and is easy to maintain, thus having good industrial application value. Attached Figure Description

[0018] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 A structural cross-sectional view of a multi-station hydrostatic testing device for a throttling component provided in an embodiment of the present invention; Figure 2 A schematic diagram of a hydrostatic testing system provided in an embodiment of the present invention; Figure 3 This is a flowchart illustrating a water pressure test method for a throttling component provided in an embodiment of the present invention.

[0019] The diagram shows: 1-Upper fixed seat; 2-Upper cover; 3-Upper sealing gasket; 4-Throttling component product; 5-Lower fixed seat; 6-Support column; 7-Lower sealing gasket; 8-Tie rod; 9-M12 hex nut; 10-Lower cover; 11-Water tank; 12-Check valve; 13-Water pump; 14-Inlet valve; 15-Water pressure testing device; 16-Pressure gauge; 17-Outlet valve; S101 - Install components; S102 - Assemble and fasten; S103 - Connect circuit; S104 - Inject water and vent air; S105 - Pressurize and maintain pressure; S106 - Depressurize and disassemble. Detailed Implementation

[0020] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0021] Example 1 This embodiment provides a basic implementation scheme for a multi-station hydrostatic testing device for throttling components, aiming to solve the problems of test failure and low efficiency caused by sealing difficulties when conducting high-pressure hydrostatic tests on throttling components with sharp end faces in the prior art.

[0022] Reference Figure 1 This diagram shows a cross-sectional view of the multi-station hydrostatic testing device for a throttling component provided in this embodiment. The device is used to perform a hydrostatic test on a special throttling component product 4. The structural feature of the throttling component product 4 is that one end (e.g., Figure 1 The lower end shown has a sharp, thin-walled end face, while an annular stepped surface is machined into its internal cavity. The core concept of this device is to transfer the sealing surface from the sharp end face, which is prone to damaging the seal, to the internal stepped surface, which has higher structural strength, through a clever structure.

[0023] Specifically, the device mainly includes an upper sealing assembly, a lower sealing assembly, a fastening assembly, and a support and transfer assembly.

[0024] In one embodiment of this application, the upper sealing assembly consists of an upper fixed seat 1 and an upper cover 2. The upper fixed seat 1 and the upper cover 2 are preferably made of a metal material with good pressure resistance and corrosion resistance (e.g., 304 or 316L stainless steel), and are firmly connected together by welding to form the water outlet section of the device. The lower surface of the upper fixed seat 1 is the sealing surface that contacts the upper end face of the throttling component product 4. It should be noted that, to ensure the reliability and consistency of the seals at multiple workstations, a key process involves performing precision machining (such as milling or grinding) on ​​the lower surface of the upper fixed seat 1 after welding the upper fixed seat 1 and the upper cover 2 to obtain extremely high flatness. This post-weld machining process effectively eliminates the influence of welding heat deformation on the sealing surface, which is a key guarantee for achieving leak-free sealing under high pressure. One or more vents are provided on the upper cover 2 to smoothly expel air from the test chamber when the test medium (usually water) is injected into the device, ensuring that the chamber is completely filled with liquid and avoiding the impact of residual gas pressure on the accuracy of the test results.

[0025] The lower sealing assembly consists of a lower fixed seat 5 and a lower cover 10. Similar to the upper sealing assembly, the lower fixed seat 5 and the lower cover 10 are preferably made of high-strength metal materials such as stainless steel and are connected by welding to form the water inlet of the device. The upper surface of the lower fixed seat 5 is used to install and position multiple throttling component products 4. Similarly, to ensure the positioning accuracy of all stations and the subsequent sealing effect, the upper surface of the lower fixed seat 5 also needs to be precision machined after welding with the lower cover 10. One or more water inlets are provided on the lower cover 10 for connecting to an external high-pressure pump source to inject pressurized fluid into the device.

[0026] The upper sealing assembly and the lower sealing assembly are arranged opposite to each other. When the two are closed, the lower surface of the upper fixing seat 1, the upper surface of the lower fixing seat 5, and the inner and outer walls of the throttling component product 4 housed therein jointly define a number of independent test chambers for hydrostatic testing, each test chamber accommodating one throttling component product 4.

[0027] The core innovation of this embodiment lies in the design of the support transfer component. For example... Figure 1 As shown, the support and transfer assembly can be implemented as multiple support columns 6. Each support column 6 is firmly mounted on the lower fixed seat 5, and its position corresponds one-to-one with the workstation on the upper fixed seat 1. Specifically, the lower end of the support column 6 passes through the reserved hole of the lower fixed seat 5 and is fixedly connected to the lower fixed seat 5 by welding. As a preferred process, the weld can be set on the back side (i.e., the lower surface) of the lower fixed seat 5 to minimize the impact of welding heat deformation on the mating surface between the support column 6 and the throttling component product 4. The height and outer diameter of each support column 6 are precisely designed so that it can smoothly extend into the internal cavity of the throttling component product 4, and its top end can be reliably supported on the stepped surface inside the throttling component product 4.

[0028] To achieve a seal, the device also includes an upper sealing gasket 3 and a lower sealing gasket 7. The upper sealing gasket 3 is an annular gasket disposed between the sealing surface of the upper fixed seat 1 and the upper end surface of the throttling component product 4. The lower sealing gasket 7 is also an annular gasket, placed between the top of the support column 6 and the stepped surface inside the throttling component product 4. The upper and lower sealing gaskets 3 and 7 are preferably made of materials with certain elasticity and high pressure resistance, such as polytetrafluoroethylene, copper, or rubber composite materials. Through this structure, when the device is clamped, the axial pressure applied to the throttling component product 4 will act on the lower sealing gasket 7 at the top of the support column 6 through its internal stepped surface, thereby forming a reliable lower end seal at this location. In this way, the sharp end face below the throttling component product 4 is prevented from directly bearing the sealing pressure, fundamentally solving the technical problem of seal failure caused by sharp end face cutting into or damaging the sealing gasket. At this time, the lower sealing gasket 7 and the stepped surface of the throttling component product 4 cooperate to form an effective sealing surface.

[0029] The fastening assembly is used to detachably clamp the assembled upper and lower sealing assemblies and provide sufficient preload to compress the upper and lower sealing gaskets 3 and 7. In this embodiment, the fastening assembly specifically includes multiple (e.g., 6) pull rods 8 and M12 hexagonal nuts 9 threaded into the pull rods 8. The pull rods 8 pass through pre-set through holes on the upper cover 2 and lower cover 10. By tightening the M12 hexagonal nuts 9 at both ends or one end, a strong and uniform axial clamping force can be applied to the entire device, ensuring that all sealing surfaces remain tightly fitted and leak-free under test pressures up to 15 MPa.

[0030] Please combine Figure 3The method for conducting a hydrostatic test using the device of this embodiment is described below. The method mainly includes the following steps: Step S101, Component Installation. The lower sealing assembly (i.e., the welded lower fixing seat 5 and lower cover 10) is placed horizontally. Then, a lower sealing gasket 7 is placed at the top of each support column 6. Subsequently, multiple throttling component products 4 to be tested are respectively fitted into their corresponding positions, ensuring that the lower end of each throttling component product 4 is fitted onto the support column 6, and its internal stepped surface accurately presses against the lower sealing gasket 7. Step S102, Assembly and Tightening. After placing an upper sealing gasket 3 on the upper end surface of each of the throttling component products 4, the upper sealing assembly (i.e., the welded upper fixing seat 1 and upper cover 2) is carefully closed on top, ensuring that each position of the upper fixing seat 1 is aligned with the throttling component product 4 below. Afterwards, multiple tie rods 8 are passed through the through holes of the upper cover 2 and lower cover 10, and M12 hexagonal nuts 9 are installed. The operator can use a torque wrench to tighten all M12 hex nuts 9 in a diagonal sequence, one at a time, evenly, until the preset torque value is reached, thus completing the assembly and fastening of the entire device. This fastening method ensures uniform distribution of clamping force and avoids excessive local stress or uneven sealing. Step S103, Connect the circuit. Connect the assembled test device to the hydrostatic test system. Specifically, connect the high-pressure water source pipeline to the water inlet of the lower cover 10 and connect an exhaust pipe to the exhaust port of the upper cover 2. Step S104, Fill and exhaust. Open the water inlet valve and slowly fill the test chamber of the device with water. During this process, keep the exhaust port open. Water will gradually fill all test chambers from bottom to top, squeezing out the internal air through the exhaust port. When a continuous, bubble-free water flow is observed to be steadily flowing out of the exhaust port, it indicates that the air in the chamber has been completely expelled, and the exhaust port can be closed at this time. Step S105, Pressurize and maintain pressure. Start the high-pressure pump to pressurize the test circuit. Monitor the pressure rise in real time using a pressure gauge until the pressure reaches the 15MPa required by the technical specifications. Once the target pressure is reached, stop pressurizing and begin timing the pressure holding period, which is determined according to relevant standards. During the pressure holding period, closely observe all connections of the device and the throttling component product 4 for any signs of leakage. Step S106: Depressurization and Disassembly. After the pressure holding period, slowly open the pressure relief valve to completely release the pressure in the system to zero. Then, disconnect from the hydrostatic test system. Following the reverse order of installation, loosen and remove all M12 hex nuts 9 and tie rods 8, remove the upper sealing assembly, and then remove all the tested throttling component products 4.

[0031] The device in this embodiment, through its multi-station integrated design, can complete the hydrostatic test of multiple (e.g., four or more as shown in the figure) throttling component products 4 at once, significantly improving testing efficiency compared to traditional single-piece testing methods. Simultaneously, its unique support-transfer-sealing structure ensures the safety of the testing process and the reliability of the results, providing a reliable solution for industrial-scale mass production inspection.

[0032] Example 2 This embodiment provides an optional implementation of a multi-station hydrostatic testing device for throttling components. Its core technical concept is consistent with Embodiment 1, namely, using a support transfer component (support column 6) to transfer the sealing surface from the sharp end face of the throttling component product 4 to its internal stepped surface. The difference lies in that this embodiment employs a different type of fastening component to adapt to different production environments or operational requirements.

[0033] In this embodiment, the main structure of the device, including the upper sealing assembly (composed of the upper fixed seat 1 and the upper cover 2), the lower sealing assembly (composed of the lower fixed seat 5 and the lower cover 10), the support and transfer assembly (support column 6), and the upper and lower sealing gaskets 3 and 7, can all be the same as the design in Embodiment 1. It should be noted that this embodiment no longer uses the pull rod 8 and the M12 hexagonal nut 9 as fastening components. Instead, the upper cover 2 and the lower cover 10 are designed as pressure plates with a large area and flat surface to facilitate cooperation with external pressurization equipment.

[0034] As an optional implementation, the fastening component in this embodiment is an external pressure device, such as a C-type hydraulic press or a gantry hydraulic press. During testing, the operation is as follows: First, following a similar manner to the first half of steps S101 and S102 in Embodiment 1, the lower sealing gasket 7, the throttling component product 4, the upper sealing gasket 3, and the upper sealing assembly are stacked and assembled sequentially. Then, the assembled unit is placed directly on the worktable of the hydraulic press, with the main cylinder (punch) of the hydraulic press positioned directly above the upper cover 2 of the device. Next, the hydraulic press is started, controlling the main cylinder to move downwards, directly applying a stable and precise axial pressure to the upper cover 2. This pressure is transmitted to the lower cover 10 through the upper fixed seat 1, the throttling component product 4, and the lower fixed seat 5, and finally, the worktable of the hydraulic press provides the reaction force. Through precise control of the main cylinder output force by the hydraulic system, a clamping force comparable to or even more uniform and controllable than the nut tightening in Embodiment 1 can be applied to the entire device, thereby pressing the upper and lower sealing gaskets 3 and 7 to form a reliable seal. While the hydraulic press maintains clamping force, subsequent water pressure tests are performed, including connecting the circuit (step S103), injecting water and venting air (step S104), and pressurizing and holding (step S105). After the test, the pressure is first released (the first half of step S106), and then the hydraulic press main cylinder is controlled to return, releasing the clamping force. At this point, the various components of the device can be separated very quickly, and the tested throttling component product 4 can be removed.

[0035] Compared to Embodiment 1, the advantage of this embodiment lies in achieving faster clamping and disassembly. Operators do not need to tighten or loosen multiple nuts individually; the entire tightening and releasing process can be completed simply by controlling the start and stop of the hydraulic press, significantly shortening auxiliary operation time and improving the cycle efficiency of a single test. This method is particularly suitable for integration with automated loading and unloading systems (such as robotic arms) to build fully or semi-automated test production lines. Therefore, the "fastening component" protected in this application is a functional concept, and its specific implementation is not limited to pull rods and nuts; it can also be a hydraulic, pneumatic, or other equivalent mechanical clamp capable of providing detachable clamping force.

[0036] Example 3 This embodiment illustrates an optional design for the sealing structure of the device of this application. The core principle of sealing surface transfer remains unchanged, but the specific implementation methods of the upper and lower seals have been optimized to further improve sealing performance and simplify the assembly process.

[0037] In this embodiment, the upper sealing structure has been improved. As an improvement, the planar upper sealing gasket 3 used in Embodiment 1 is replaced with an O-ring. Specifically, an annular groove can be machined into the lower surface of the upper fixing seat 1 around each through hole for accommodating the throttling component product 4. The size of the O-ring matches the groove and is embedded in the groove during assembly. When the device is clamped by the fastening assembly, the upper end face of the throttling component product 4 presses against the O-ring, causing it to elastically deform and fill the groove, thereby forming a reliable line seal between the upper end face of the throttling component product 4 and the upper fixing seat 1. Compared with the planar seal, the O-ring seal has a better self-sealing effect, relatively lower requirements for the smoothness of the contact surface, and can provide more stable sealing performance within a certain pressure range.

[0038] Accordingly, this embodiment also optimizes the lower sealing structure, integrating the separate support column 6 and lower sealing gasket 7 from Embodiment 1 into a single design. Specifically, the top of the support column 6, i.e., the portion in contact with the internal stepped surface of the throttling component product 4, is directly laminated with a high-performance elastomer material (such as polyurethane, nitrile rubber, etc.) through vulcanization, bonding, or other equivalent processes, forming a composite support column with a self-sealing function. This elastomer layer laminated at the top of the support column 6 functions equivalently to the original lower sealing gasket 7, forming a sealing surface that mates with the internal stepped surface of the throttling component product 4.

[0039] This integrated composite support structure offers the following advantages. First, it simplifies the assembly process. When installing the throttling component 4, operators no longer need to carefully place an individual lower sealing gasket 7 at the top of each small support 6, thus reducing the number of parts and simplifying the operation. Second, it avoids problems such as the lower sealing gasket 7 potentially falling off, becoming misaligned, or being misplaced during installation, thereby improving assembly accuracy and the first-time success rate, and further ensuring the reliability of the lower seal.

[0040] The working process of this embodiment is basically the same as that of Embodiment 1, except that when installing the component (step S101), the operator can directly put the throttling component product 4 onto the composite support with the elastomer tip. This embodiment shows that the "sealing surface" in this application can have various specific implementation forms, such as being provided by an independent sealing gasket or by an elastomer layer directly laminated to the structural component. Similarly, the upper sealing structure is not limited to a flat gasket, but can be an O-ring or other forms of sealing element. The above-mentioned modified designs do not depart from the core concept of this application, and therefore should fall within the protection scope of this application.

[0041] Example 4 This embodiment demonstrates how the multi-station hydrostatic testing device for throttling components provided in this application can be integrated as a standardized modular unit into a highly efficient and scalable batch hydrostatic testing system, thereby achieving a linear amplification of testing capabilities and efficiency.

[0042] Reference Figure 2 This illustrates a complete hydrostatic testing system constructed in this embodiment. The system includes a fluid loop and at least one, preferably multiple, hydrostatic testing devices 15 connected in series. The specific structure of the hydrostatic testing device 15 can adopt any of the schemes described in Embodiments 1 to 3.

[0043] like Figure 2 As shown, the fluid loop of this system consists of several key components. A water tank 11 is installed in the system as a storage container and source of test water. The loop includes a pump source, specifically a water pump 13 capable of providing the required high pressure (e.g., above 15 MPa). The inlet of the water pump 13 is connected to the water tank 11, and its outlet is connected to the main pressure pipeline. Preferably, a check valve 12 is installed near the inlet or outlet of the water pump 13 to prevent high-pressure water from flowing back and impacting the pump 13 when it stops working or the system is depressurized. The pipeline also has an inlet valve 14 and an outlet valve 17 for controlling the on / off, water injection, and depressurization of the entire test loop. A pressure gauge 16 is installed at the end of the loop or in an easily observable location to monitor and display the internal fluid pressure of the system in real time; this is a key instrument to ensure that the test is conducted at the specified pressure.

[0044] The key aspect of this embodiment lies in demonstrating the system integration and application of multiple hydrostatic testing devices 15. For example... Figure 2 As shown, two (or more) hydrostatic testing devices 15 are connected in series via high-pressure pipelines. Specifically, the inlet of the first hydrostatic testing device 15 is connected to the main pipeline from the inlet valve 14, while its vent (used as an outlet) is connected to the inlet of the second hydrostatic testing device 15 via a high-pressure hose or rigid pipe. This process continues, allowing for the series connection of any number of devices. The vent of the last hydrostatic testing device 15 (i.e., the total outlet of the entire series circuit) is connected to the pressure gauge 16 and the outlet valve 17.

[0045] The method for conducting large-scale batch testing using this system is as follows: 1. First, for all the hydraulic pressure testing devices 15 planned to be used in series, complete the installation of the throttling component product 4 to be tested and the assembly and fastening of the devices according to steps S101 and S102 described in Example 1. 2. Then, for all the fastened devices 15, proceed with the following steps... Figure 2 Connect the components in series as shown. 3. Ensure that the outlet valve 17 is open, then open the inlet valve 14 and start the water pump 13. Water is drawn from the water tank 11, pressurized by the water pump 13, and flows sequentially through the first water pressure test device 15, the second water pressure test device 15, and so on, until all the connected devices are filled. 4. When the water flows steadily out of the last outlet valve 17 without air bubbles, it indicates that the venting process of the entire series circuit is complete. At this time, close the outlet valve 17. 5. The water pump 13 continues to run, and due to the closed circuit, the pressure of the entire system begins to rise rapidly. The operator monitors the pressure through the pressure gauge 16. When the pressure reaches the preset 15MPa, the pressure can be stabilized at this value by controlling the water pump speed through frequency conversion or by using an overflow valve, and the pressure holding timer begins. 6. After the pressure holding is completed, stop the water pump 13 and slowly open the outlet valve 17 to release the pressure of the entire series circuit. 7. After the pressure drops to zero, each water pressure test device 15 can be removed from the circuit and disassembled separately to take out the tested throttling component products.

[0046] This integrated system solution can simultaneously complete the hydrostatic testing of dozens or even hundreds of throttling components in all series-connected devices through a single water injection, pressurization, and pressure holding operation, greatly improving the overall testing throughput. This fully demonstrates the modularity, standardization, and scalability advantages of the device design in this application, providing a valuable industrial solution for meeting the large-scale, high-efficiency, and high-quality testing needs of key components in fields such as nuclear power.

[0047] Example 5 This embodiment provides a device for hydrostatic testing of high-temperature reactor throttling components, which consists of ten parts, namely, upper fixed seat, upper cover, upper sealing gasket, throttling component product, lower fixed seat, support column, lower sealing gasket, tie rod, M12 hexagonal nut, lower cover, etc.

[0048] Furthermore, after the upper fixed seat and the upper cover are welded together, they form the water outlet section for the water pressure test of the throttling component. To ensure the reliability of the installation seal, the sealing surface is integrally machined after welding. It is pressed and sealed with the throttling component product by a sealing gasket. There is an exhaust port on the upper cover to facilitate the exhaust of water when adding water.

[0049] Furthermore, after the lower fixed seat and the lower cover are welded together, they form the water inlet end of the throttling component for the water pressure test. In order to ensure that multiple throttling components can be successfully positioned and sealed after assembly, the mounting surface of the lower fixed seat needs to be integrally machined after welding.

[0050] Furthermore, a support is set to transfer the lower sealing surface to the internal stepped surface of the throttling component. The support and the lower fixed seat are sealed by welding. To avoid welding deformation affecting the sealing effect, the weld is set on the back of the lower fixed seat away from the sealing surface.

[0051] Furthermore, after the throttling component is assembled with the water pressure testing device, it is tightened by six tie rods to ensure sealing performance.

[0052] Furthermore, after the throttling components are assembled with the water pressure testing device, the device can be tightened by six tie rods to ensure sealing performance and simultaneously enable multiple throttling components to undergo water pressure testing.

[0053] Furthermore, multiple hydrostatic testing devices can be connected in series in the circuit to conduct hydrostatic tests simultaneously, thereby improving efficiency.

[0054] The device in this embodiment mainly consists of ten parts (see appendix). Figure 1 The components are as follows: 11 Upper fixing seat, 12 Upper cover, 13 Upper sealing gasket, 14 Throttling component, 15 Lower fixing seat, 16 Support column, 17 Lower sealing gasket, 8 Tie rod, 9 M12 hex nut, 10 Lower cover, etc.

[0055] In this embodiment, the upper fixing seat and the upper cover are welded together to form the water outlet section of the throttling component for water pressure testing. To ensure the reliability of the installation seal, the sealing surface is integrally machined after welding. It is pressed and sealed with the throttling component product by a sealing gasket. There is an exhaust port on the upper cover to facilitate the exhaust of water when adding water.

[0056] In this embodiment, the lower fixing seat and the lower cover are welded together to form the water inlet end of the throttling component for water pressure testing. In order to ensure that multiple throttling components can be successfully positioned and sealed after assembly, the mounting surface of the lower fixing seat needs to be integrally machined after welding.

[0057] In this embodiment, since the lower end face of the throttling component is sharp, it will cut into the sealing gasket when it comes into direct contact with the sealing gasket, resulting in sealing failure. Therefore, a support is set to transfer the sealing surface to the internal stepped surface of the throttling component. The support and the lower fixed seat are sealed by welding. In order to avoid welding deformation affecting the sealing effect, the weld is set on the back of the lower fixed seat away from the sealing surface.

[0058] In this embodiment, the throttling component and the hydrostatic testing device are assembled and tightened by six tie rods to ensure sealing performance. This embodiment's device can simultaneously perform hydrostatic testing on multiple throttling components. This embodiment can also connect multiple hydrostatic testing devices in series in the circuit to perform hydrostatic testing synchronously, improving efficiency.

[0059] The hydrostatic testing device for throttling components provided in this embodiment is used for hydrostatic testing and verification of throttling components. The device is easy to use and can perform hydrostatic tests on multiple products simultaneously, greatly improving testing capacity and achieving the goal of cost reduction and efficiency improvement.

[0060] The weld seams of the feedwater inlet throttling assembly of the high-temperature gas-cooled reactor steam generator require a 15MPa hydrostatic test. Due to the small size of the throttling assembly, difficulty in positioning and sealing, and the large number of parts, multiple products need to be tested simultaneously to meet schedule requirements. Therefore, a multi-station hydrostatic testing device was designed, which is easy to install and cost-effective. The device in this embodiment is used to achieve the above-mentioned testing objectives.

[0061] The hydrostatic testing device in this embodiment is easy to use and can perform hydrostatic tests on multiple products simultaneously, greatly improving testing capacity.

[0062] The device in this embodiment has a novel and simple structure, facilitating batch testing. It is easy and convenient to operate, with quick assembly and disassembly, making it suitable for large-scale hydrostatic testing of throttling components. It is cost-effective and highly efficient.

[0063] This invention provides an apparatus, system, and method for hydrostatic testing of throttling components, belonging to the field of pressure vessel testing technology. This solution aims to address the problems of difficult sealing and low efficiency when performing hydrostatic testing on throttling components with sharp end faces. The apparatus includes: upper and lower sealing assemblies that together define a test chamber; a fastening assembly for clamping the assemblies; and a support and transfer assembly disposed on the lower sealing assembly to support the stepped surface inside the throttling component, thereby transferring the sealing surface from the sharp end face of the component to the internal stepped surface to achieve a reliable seal. This invention also provides a test system including this apparatus and a corresponding hydrostatic testing method. This invention fundamentally solves the sealing problem and improves test reliability through an innovative sealing surface transfer method; simultaneously, the multi-station and tandem design significantly improves batch testing efficiency and has good industrial application value.

[0064] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0065] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. An apparatus for hydrostatic testing of a throttling component, the throttling component having a sharp end face and a stepped internal surface, characterized in that, include: An upper sealing assembly and a lower sealing assembly, wherein the upper sealing assembly and / or the lower sealing assembly are provided with sealing surfaces, the upper sealing assembly and the lower sealing assembly are disposed opposite to each other, and together define one or more test chambers for accommodating the throttling component; Fastening assembly for detachably clamping the upper sealing assembly and the lower sealing assembly; as well as A support transfer assembly is disposed on the lower sealing assembly and adapted to mate with one side of the sharp end face of the throttling assembly. The support transfer assembly is used to support the stepped surface inside the throttling assembly, so that the stepped surface mates with the sealing surface to form a seal in place of the sharp end face.

2. The apparatus for hydrostatic testing of a throttling component according to claim 1, characterized in that, The support transfer component is a pillar, which is fixed on the lower sealing assembly, and one end of the pillar is used to support the stepped surface inside the throttling component.

3. The apparatus for hydrostatic testing of a throttling component according to claim 2, characterized in that, The upper sealing assembly includes an upper fixing seat and an upper cover, and the lower sealing assembly includes a lower fixing seat and a lower cover; at least one of the upper fixing seat and the lower fixing seat has a sealing surface, which is used to cooperate with the stepped surface inside the throttling assembly to form a seal.

4. The apparatus for hydrostatic testing of a throttling component according to claim 3, characterized in that, At least one of the sealing surfaces of the upper and lower fixed seats is formed by post-weld machining.

5. The apparatus for hydrostatic testing of a throttling component according to claim 3, characterized in that, The fastening assembly includes multiple pull rods passing through the upper and lower sealing assemblies, and nuts that cooperate with the pull rods.

6. The apparatus for hydrostatic testing of a throttling component according to claim 1, characterized in that, The upper sealing assembly is provided with an exhaust port, and the lower sealing assembly is provided with a water inlet.

7. The apparatus for hydrostatic testing of a throttling component according to claim 6, characterized in that, The inlet and outlet of the device are suitable for connection in series with corresponding outlets of other identical devices.

8. A hydrostatic testing system, characterized in that, include: At least one device as described in claim 6 or 7; as well as A fluid circuit connected to the inlet and outlet of the device, the fluid circuit including a pump source for providing high-pressure fluid.

9. A method for hydrostatic testing of a throttling component using the device of claim 1, wherein the throttling component has a sharp end face and a stepped surface inside, characterized in that... Includes the following steps: The throttling component is housed within the test chamber of the device, and the support transfer component of the device supports the stepped surface inside the throttling component; The upper and lower sealing assemblies are clamped by the fastening components of the device, thereby making the stepped surface cooperate with the sealing surface of the device to form a seal; as well as Pressurized fluid is injected into the test chamber.

10. The water pressure test method for the throttling component according to claim 9, characterized in that, The method for testing the throttling components by water pressure includes: simultaneously testing multiple throttling components by water pressure, or connecting multiple devices in series and conducting water pressure tests synchronously.

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