CN-122016497-A - Device, system and method for hydrostatic test of throttling assembly

CN122016497ACN 122016497 ACN122016497 ACN 122016497ACN-122016497-A

Abstract

The invention provides a device, a system and a method for hydrostatic test of a throttling assembly, which belong to the technical field of pressure vessel test, and the scheme aims to solve the problems of difficult sealing and low efficiency when the hydrostatic test is carried out on the throttling assembly with a sharp end surface; and a support transfer assembly provided on the lower seal assembly for supporting the stepped surface inside the throttle assembly to transfer the sealing action surface from the sharp end surface of the assembly to the inner stepped surface to achieve a reliable seal. The invention also provides a test system comprising the device and a corresponding hydrostatic test method. The invention fundamentally solves the sealing problem by an innovative sealing surface transferring mode, improves the test reliability, and simultaneously, the multi-station and serially-connected design remarkably improves the batch test efficiency and has good industrial application value.

Inventors

TANG ZHIYUAN
LIU ZENGRUI
Miao Shengchao
LI JUNRUI
ZHANG YIWEI

Assignees

上海第一机床厂有限公司

Dates

Publication Date: 20260512
Application Date: 20260403

Claims (10)

1. A device for hydrostatic testing of a throttle assembly having a sharp end face at one end and a stepped surface inside, comprising: The upper sealing assembly and the lower sealing assembly are provided with sealing surfaces, are oppositely arranged, and jointly define one or more test chambers for accommodating the throttling assembly; A fastening assembly for detachably clamping the upper seal assembly and the lower seal assembly, and The support transfer assembly is arranged on the lower sealing assembly and is suitable for being matched with one side of the sharp end face of the throttling assembly, and the support transfer assembly is used for supporting the step surface inside the throttling assembly, so that the step surface is matched with the sealing surface to replace the sharp end face to form a seal.
2. The apparatus for hydrostatic testing of a restriction assembly according to claim 1, wherein said support transfer assembly is a pillar fixedly attached to said lower seal assembly and having one end for supporting a stepped surface within said restriction assembly.
3. The apparatus for hydrostatic testing of a throttling assembly of claim 2, wherein said upper seal assembly includes an upper mounting seat and an upper cover, said lower seal assembly includes a lower mounting seat and a lower cover, at least one of said upper mounting seat and said lower mounting seat having a sealing surface for mating with a stepped surface within said throttling assembly to form a seal.
4. A device for hydrostatic testing of a throttle assembly according to claim 3, wherein at least one of the sealing surface of the upper fixing seat and the sealing surface of the lower fixing seat is post-weld formed.
5. A device for hydrostatic testing of a throttle assembly according to claim 3, wherein said fastening assembly includes a plurality of tie rods threaded through said upper and lower seal assemblies, and nuts engaging said tie rods.
6. The apparatus for hydrostatic testing of a throttling assembly of claim 1, wherein said upper seal assembly is provided with an exhaust port and said lower seal assembly is provided with a water inlet port.
7. The apparatus for hydrostatic testing of a throttling assembly of claim 6, wherein the water inlet and the air outlet of the apparatus are adapted to be connected in series with corresponding ports of other like apparatus.
8. A hydrostatic test system, comprising: at least one device according to claim 6 or 7, and A fluid circuit connected to the inlet and outlet of the device, the fluid circuit including a pump source for providing a high pressure fluid.
9. A method of hydrostatic testing a throttle assembly having a sharp end face at one end and a stepped surface in the interior using the apparatus of claim 1, comprising the steps of: accommodating the throttling assembly in a test chamber of the device, and enabling a supporting and transferring assembly of the device to support a step surface inside the throttling assembly; clamping the upper and lower seal assemblies by a fastening assembly of the device such that the stepped surface cooperates with a sealing surface of the device to form a seal, and A pressurized fluid is injected into the test chamber.
10. The method of hydrostatic testing a throttle assembly according to claim 9, wherein the method of hydrostatic testing a throttle assembly includes hydrostatic testing a plurality of throttle assemblies simultaneously or connecting a plurality of devices in series and synchronously.

Description

Device, system and method for hydrostatic test of throttling assembly Technical Field The invention relates to the technical field of pressure vessel testing, in particular to a device, a system and a method for hydrostatic testing of a throttling assembly, and particularly relates to a device for hydrostatic testing of a throttling assembly of a high-temperature stack evaporator. Background High temperature gas cooled reactors are an important development direction of advanced nuclear energy systems, and the feed water inlet throttling component in the steam generator of core equipment is critical to the safe operation of the reactor. According to the relevant technical specifications, the weld joints of such throttling assemblies must be tested by rigorous hydrostatic testing to verify their structural integrity and pressure-bearing capacity. However, hydrostatic testing of the choke assembly presents technical challenges during actual production and quality testing. First, the throttle assembly is specially constructed, and one end of the throttle assembly is usually designed into a sharp or thin-walled structure, so that when high pressure is applied to seal, a conventional planar sealing gasket is easily cut into or damaged by the sharp end surface of the throttle assembly, and the throttle assembly is failed in sealing, and the test cannot be performed or the result is unreliable. Secondly, the throttle assembly is used as a part for mass production, the quantity is huge, the efficiency of the traditional single-piece test mode is extremely low, and the requirements of engineering progress and cost control cannot be met completely. Although some pipeline systems for multiplex or batch testing exist in the prior art, which can test multiple throttles simultaneously to improve efficiency, these existing solutions are usually designed for universal components, and do not provide reliable sealing solutions for the above-mentioned special structural components with sharp end surfaces, so that sealing difficulties still exist in practical application and pain points with poor test reliability are not fundamentally solved. Disclosure of Invention In view of the shortcomings in the prior art, it is an object of the present invention to provide an apparatus, system and method for hydrostatic testing of a throttling assembly. According to the invention, a device for hydrostatic test of a throttling assembly is provided, the throttling assembly is provided with a sharp end surface at one end and a step surface inside, and the device comprises: The upper sealing assembly and the lower sealing assembly are provided with sealing surfaces, are oppositely arranged, and jointly define one or more test chambers for accommodating the throttling assembly; A fastening assembly for detachably clamping the upper seal assembly and the lower seal assembly, and The support transfer assembly is arranged on the lower sealing assembly and is suitable for being matched with one side of the sharp end face of the throttling assembly, and the support transfer assembly is used for supporting the step surface inside the throttling assembly, so that the step surface is matched with the sealing surface to replace the sharp end face to form a seal. Preferably, the support transfer assembly is a pillar, the pillar is fixedly arranged on the lower sealing assembly, and one end of the pillar is used for supporting the step surface in the throttling assembly. Preferably, the upper sealing assembly comprises an upper fixing seat and an upper cover, the lower sealing assembly comprises a lower fixing seat and a lower cover, at least one of the upper fixing seat and the lower fixing seat is provided with a sealing surface, and the sealing surface is used for being matched with a step surface in the throttling assembly to form a seal. Preferably, at least one of the sealing surface of the upper fixing seat and the sealing surface of the lower fixing seat is formed by post-welding machining. Preferably, the fastening assembly comprises a plurality of pull rods penetrating the upper sealing assembly and the lower sealing assembly, and nuts matched with the pull rods. Preferably, the upper sealing assembly is provided with an exhaust port, and the lower sealing assembly is provided with a water inlet. Preferably, the inlet and outlet of the device are adapted to be connected in series with corresponding ports of the other identical device. The invention also provides a hydrostatic test system, comprising: at least one of the above devices, and A fluid circuit connected to the inlet and outlet of the device, the fluid circuit including a pump source for providing a high pressure fluid. The invention also provides a hydraulic test method of the throttling assembly using the device, wherein the throttling assembly is provided with a sharp end surface at one end and a step surface inside, and the hydraulic test method comprises the following steps: acco