Hydraulic characteristic verification test tool

Abstract

The invention discloses a hydraulic characteristic verification test tool. The hydraulic characteristic verification test tool comprises a first-stage test tool and a second-stage test tool, the first-stage test tool comprises a grid plate assembly, a bottom cylinder, a taper pipe, a lower joint, a cylinder, an upper joint, a water inlet cylinder and a water inlet reducing cylinder, the water inlet cylinder is welded with the water inlet reducing cylinder, the upper end of the cylinder is welded with the upper joint, the lower end of the cylinder is bolted with the lower joint, the water inlet cylinder is connected with the cylinder through a flange, and the cylinder is connected with the grid plate assembly through a flange; the grid plate assembly is connected with the bottom cylinder through a flange, and the bottom cylinder is welded to the taper pipe. The second-stage test tool comprises an upper cylinder, a conical section, a middle cylinder, a lower cylinder, a grid plate assembly, a bottom cylinder and a conical pipe, the upper cylinder is welded to the conical section, the conical section is welded to the middle cylinder, and an inlet pipe is vertically welded to the side face of the upper cylinder; the lower cylinder is connected with the middle cylinder and the grid plate assembly through flanges. The test tool is small in size, better in sealing performance and higher in adaptability.

Description

Technical Field

[0001] The invention relates to the technical field of thermal hydraulic research, and in particular to a hydraulic characteristic verification test tool. Background Art

[0002] In order to verify the reliability and rationality of the design of the irradiation test device, evaluate the feasibility of the parameter monitoring equipment and internal structure design of the device, and obtain the operability range of the test device and the relationship between flow and pressure difference by adjusting the external loop parameters, the hydraulic characteristics verification test tooling is a necessary means to achieve the above requirements. Therefore, the design of the hydraulic characteristics verification test tooling is crucial for the design and performance evaluation of new irradiation test devices.

[0003] As an important equipment for verifying the performance of irradiation test equipment, hydraulic characteristics verification test equipment plays the role of parameter adjustment and matching the in-pile environment in the process of irradiation test equipment performance evaluation and design rationality verification. With the increase in the irradiation of new materials and new fuels, new irradiation test equipment structures are emerging in an endless stream, and the requirements for the adaptability, versatility and ease of operation of hydraulic characteristics verification test equipment are more stringent. The existing hydraulic characteristics verification test equipment has a complex structure and poor flexibility, which brings many inconveniences to the implementation of hydraulic characteristics tests.

[0004] Based on the above requirements, it is necessary to redesign the hydraulic characteristics test tooling with simple structure, powerful functions, and the ability to meet the verification of multiple structures and multiple parameters, so as to save the test cost and shorten the test cycle. Summary of the invention

[0005] The purpose of the present invention is to provide a hydraulic characteristic verification test tool in view of the above-mentioned shortcomings of the existing hydraulic characteristic verification test tool. The tool has a small size, better sealing performance, and stronger adaptability. It can be used to verify the rationality of the design of the irradiation test device, while meeting the requirements of disassembly and replacement of components and adjustment of the test plan at any time during the test without affecting the acquisition of test data.

[0006] The present invention is achieved through the following technical solutions:

[0007] The present invention provides a hydraulic characteristic verification test fixture, including a first-stage test fixture and a second-stage test fixture; the first-stage test fixture includes a grid plate assembly, a bottom cylinder, a cone tube, a lower joint, a cylinder, an upper joint, a water inlet cylinder and a water inlet reducer, the large-diameter ends of the water inlet cylinder and the water inlet reducer are welded, the upper end of the cylinder is welded to the upper joint, and the lower end is connected to the lower joint with screws, the lower end of the water inlet cylinder is connected to the upper end of the cylinder through a flange, the lower end of the cylinder is connected to the upper end of the grid plate assembly through a flange, the lower end of the grid plate assembly is connected to the upper end of the bottom cylinder through a flange, and the lower end of the bottom cylinder is welded to the large-diameter end of the cone tube;

[0008] The second-stage test tooling includes an upper cylinder, a cone section, a middle cylinder, a lower cylinder, and the grid plate assembly, the bottom cylinder and the cone tube in the first-stage test tooling. The lower end of the upper cylinder is welded to the large-diameter end of the cone section, the small-diameter end of the cone section is welded to the upper end of the middle cylinder, and an inlet pipe is vertically welded to the side of the upper cylinder; the upper and lower ends of the lower cylinder are respectively connected to the lower end of the middle cylinder and the upper end of the grid plate assembly through flanges.

[0009] In the above technical scheme, the grid plate assembly, the bottom cylinder, and the cone are common parts in the first-stage test fixture and the second-stage test fixture. Since the various parts in the first-stage test fixture and the second-stage test fixture are detachably connected through flanges, the parts can be disassembled and replaced and the test plan can be adjusted at any time during the test. The test fixture is small in size, has better sealing performance, and is more adaptable. It can replace the existing test fixtures that are large in size, complex in structure, and have high processing requirements. For hydraulic tests that require frequent replacement of internal components, the first-stage test fixture is used. Its simple structure, light weight, and easy operation can be used to quickly complete the test. After completing the screening of basic components, the second-stage test fixture is used to evaluate the performance of the irradiation test device.

[0010] As a preferred solution of the present invention, the small diameter ends of the water inlet reducer and the cone tube are provided with flanges, and the upper end of the upper cylinder is provided with a flange. By providing the flanges, it is convenient to connect the test tooling in the test circuit.

[0011] As a preferred solution of the present invention, the flange connections in the first-stage test fixture and the second-stage test fixture are provided with sealing gaskets. By providing the sealing gaskets, the various parts of the test fixture are sealed through the flanges and the sealing gaskets to avoid cooling water leakage.

[0012] As a preferred embodiment of the present invention, pressure-inducing pipes are installed on the sides of the water inlet cylinder, cylinder body and bottom cylinder body of the first-stage test tooling, and pressure-inducing pipes are installed on the sides of the inlet pipe of the second-stage test tooling.

[0013] As a preferred solution of the present invention, the three pressure-guiding pipes installed in the water inlet cylinder, cylinder, bottom cylinder and inlet pipe form a group, and all the pressure-guiding pipes are installed at the same axial height and are evenly distributed. By arranging the pressure-guiding pipes according to the above requirements, the pressure measurement of the above parts can be performed at multiple points along the circumferential direction, thereby ensuring the accuracy of the pressure measurement data.

[0014] As a preferred embodiment of the present invention, the pressure pipe measuring point on the inlet pipe is set at 500mm~650mm away from the center line of the upper cylinder; the pressure pipe measuring point on the water inlet cylinder is set at 400mm~500mm away from the upper end of the upper joint; the pressure pipe measuring point on the bottom cylinder is set at 450mm~550mm away from the lower end of the grid plate assembly; the pressure pipe measuring point on the cylinder is set at 300mm~350mm away from the upper end of the grid plate assembly.

[0015] As a preferred solution of the present invention, the grid plate assembly has a stepped hole inside, a cone-shaped structure is set at the entrance, and multiple sets of sealing grooves are processed, in which O-type sealing gaskets and square sealing gaskets are installed. By setting the above two sealing gaskets in the sealing groove, it is mainly used to seal the gap between the grid plate assembly and the lower joint.

[0016] As a preferred solution of the present invention, the angle of the grid plate assembly entrance tapered hole is 60° to 65°, the number of the sealing grooves is 2 to 3 groups; the material of the O-type sealing gasket is rubber, and the material of the square sealing gasket is polyethylene. By setting the tapered hole of the above angle, when assembling the test fixture, the tapered hole can guide the lower joint to facilitate smooth insertion into the grid plate assembly. At the same time, due to the high hardness of polyethylene, it can be ensured that the rubber gasket will not be inserted into the gap between the inner hole wall of the grid plate assembly and the outer wall of the lower joint, and the rubber gasket can achieve sealing of the gap.

[0017] As a preferred solution of the present invention, the lower joint can be inserted into the grid plate assembly, and a gap of 0.5 mm to 1 mm is left between the inner hole wall of the grid plate assembly and the outer wall of the lower joint, and the O-type sealing gasket and the square sealing gasket are interference fit with the outer wall of the lower joint. By limiting the gap value between the grid plate assembly and the lower joint to the above value, a positioning effect can be formed when the lower joint is inserted into the inner hole of the grid plate assembly, and at the same time, the O-type sealing gasket and the square sealing gasket are interference fit with the outer wall of the lower joint, which can well seal the above gap.

[0018] As a preferred solution of the present invention, the sealing groove is located 20 mm to 30 mm away from the outlet of the grid plate assembly. By providing the sealing groove at the above position of the inner hole of the grid plate assembly, it is convenient to install and remove the O-type sealing gasket and the square sealing gasket during testing.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0020] 1. The hydraulic characteristics verification test fixture of the present invention can be used to verify the rationality of the design of the irradiation test device, and at the same time, it can be disassembled and replaced at any time during the test, and the test plan can be adjusted without affecting the acquisition of test data;

[0021] 2. The hydraulic characteristics verification test tooling in the present invention has a small size, better sealing performance, and stronger adaptability, and can replace the existing test tooling with a large size, complex structure, and high processing requirements;

[0022] 3. The hydraulic characteristics verification test tooling of the present invention is provided with multiple pressure measuring points, which can satisfy the pressure difference measurement of different positions and different internal structural parts of the test device, and can provide good feedback on the rationality of the device design;

[0023] 4. The hydraulic characteristic verification test tooling in the present invention divides the entire hydraulic characteristic test into two stages. For hydraulic tests that require frequent replacement of internal components, the first stage test tooling is used. The test can be completed quickly by utilizing its simple structure, light weight, and easy operation. After the screening of basic components is completed, the second stage test tooling is used to evaluate the performance of the irradiation test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0025] Figure 1 It is a schematic diagram of the structure of the second-stage hydraulic test tooling in the present invention;

[0026] Figure 2 This is a schematic diagram of the first stage hydraulic test tooling structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the grid plate assembly in the present invention;

[0028] Figure 4 For the present invention Figure 3 Schematic diagram of the local structure at location I in FIG.

[0029] Marks and corresponding parts names in the attached drawings:

[0030] 1-upper cylinder; 2-inlet pipe; 3-cone section; 4-middle cylinder; 5-lower cylinder; 6-grid plate assembly; 7-bottom cylinder; 8-pressure pipe; 9-cone pipe; 10-lower joint; 11-cylinder; 12-upper joint; 13-water inlet cylinder; 14-water inlet reducer; 15-O-type sealing gasket; 16-square sealing gasket. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary implementation modes of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0033] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0034] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0036] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0037] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces), unless otherwise clearly and specifically defined.

[0038] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0039] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0040] Irradiation testing is an important part of nuclear material research and development. It provides important feedback for the design of front-end materials and can provide technical verification for engineering applications. Irradiation test equipment is a necessary condition for conducting irradiation tests and also largely determines whether the irradiation test conditions can meet the expected requirements.

[0041] The design of hydraulic characteristics verification test fixtures is crucial for the design and performance evaluation of new irradiation test equipment. With the increase in the irradiation of new materials and new fuels, new irradiation test equipment structures are emerging in an endless stream, and the requirements for the adaptability, versatility, and ease of operation of hydraulic characteristics verification test fixtures are becoming more stringent. The existing hydraulic characteristics verification test fixtures have complex structures and poor flexibility, which has brought many inconveniences to the implementation of hydraulic characteristics tests.

[0042] Based on this, the applicant has conducted in-depth research and invented a hydraulic property verification test tool with a simple structure and powerful functions, which can be used to verify the rationality of the design of the irradiation test device, while meeting the requirements of disassembly and replacement of components and adjustment of the test plan at any time during the test without affecting the acquisition of test data.

[0043] Please refer to Figures 1 to 4 ,in, Figure 1 This is a schematic diagram of the second stage hydraulic test tooling structure in this application. Figure 2 This is a schematic diagram of the first stage hydraulic test tooling structure in this application. Figure 3 This is a schematic diagram of the grid plate assembly structure in this application. Figure 4 For this application Figure 3 Schematic diagram of the local structure at location I in FIG.

[0044] A hydraulic characteristic verification test fixture provided in the embodiment of the present application includes a first-stage test fixture and a second-stage test fixture; the first-stage test fixture includes a grid plate assembly 6, a bottom cylinder 7, a cone tube 9, a lower joint 10, a cylinder 11, an upper joint 12, a water inlet cylinder 13 and a water inlet reducer 14, the water inlet cylinder 13 and the large-diameter end of the water inlet reducer 14 are welded, the upper joint 12 is welded to the upper end of the cylinder 11, the lower end of the cylinder 11 is connected to the lower joint 10 with screws, the lower end of the water inlet cylinder 13 is connected to the upper end of the cylinder 11 through a flange, the lower end of the cylinder 11 is connected to the upper end of the grid plate assembly 6 through a flange, the lower end of the grid plate assembly 6 is connected to the upper end of the bottom cylinder 7 through a flange, and the lower end of the bottom cylinder 7 is welded to the large-diameter end of the cone tube 9;

[0045] The second-stage test tooling includes an upper cylinder 1, a cone section 3, a middle cylinder 4, a lower cylinder 5, and the grid plate assembly 6, the bottom cylinder 7 and the cone tube 9 in the first-stage test tooling. The lower end of the upper cylinder 1 is welded to the large-diameter end of the cone section 3, the small-diameter end of the cone section 3 is welded to the upper end of the middle cylinder 4, and the side of the upper cylinder 1 is vertically welded with an inlet pipe 2; the upper and lower ends of the lower cylinder 5 are respectively connected to the lower end of the middle cylinder 4 and the upper end of the grid plate assembly 6 through flanges.

[0046] The components in the first-stage test fixture and the second-stage test fixture of this embodiment are all pipe structures, wherein the first-stage test fixture forms a water inlet and outlet channel through the water inlet reducer 14 and the cone tube 9, and the first-stage test fixture is mainly used to screen the throttling components inside the irradiation test device. The second-stage test fixture forms a water inlet and outlet channel through the inlet pipe 2 and the cone tube 9, and the second-stage test fixture is mainly used to verify the performance of the irradiation test device.

[0047] The water inlet reducer 14 and the water inlet cylinder 13 in the first-stage test tooling are welded into a whole one, the upper joint 12 and the cylinder body 11 are welded into a whole two, the bottom cylinder body 7 and the cone tube 9 are welded into a whole three, and together with the lower joint 10 and the grid plate assembly 6, the first-stage test tooling consists of five detachable parts.

[0048] The upper cylinder 1, inlet pipe 2, cone section 3, and middle cylinder 4 in the second-stage test tooling are welded into a whole one, the bottom cylinder 7 and cone tube 9 are welded into a whole two, and the lower cylinder 5 and grid plate assembly 6 are added. Therefore, the second-stage test tooling consists of four detachable parts.

[0049] Since the various parts of the first-stage test tooling and the second-stage test tooling are connected by flanges, the assembly or disassembly of the tooling, segmented transportation, etc. can be realized, and at the same time, some parts of the first-stage test tooling and the second-stage test tooling can be used interchangeably. It should be noted that the flange structure of the connection between the various parts of the first-stage test tooling and the second-stage test tooling is not shown in the figure.

[0050] The grid plate assembly 6, bottom cylinder 7, and cone tube 9 in the embodiment of the present application are common parts in the first-stage test fixture and the second-stage test fixture. Since the flange types connecting the various parts in the first-stage test fixture and the second-stage test fixture are consistent and the interfaces are matched, the parts can be disassembled and replaced and the test plan can be adjusted at any time during the test. For example, when assembling the first-stage test fixture, the lower end of the cylinder 11 is connected to the upper end of the grid plate assembly 6 through a flange; when assembling the second-stage test fixture, the lower end of the lower cylinder 5 is connected to the upper end of the grid plate assembly 6 through a flange.

[0051] According to some embodiments of the present application, the water inlet reducer 14 and the small diameter end of the cone tube 9 in the first-stage test fixture are both equipped with flanges (not shown in the figure), and the flanges are used to connect the two ends of the first-stage test fixture to the test circuit. The upper end of the upper cylinder 1 and the end of the inlet pipe 2 in the second-stage test fixture are both equipped with flanges. Among them, the flange at the upper end of the upper cylinder 1 is mainly used to form a sealed connection with the flange on the irradiation test device after the irradiation test device is inserted into the second-stage test fixture. During the second-stage test, the second-stage test fixture is connected to the test circuit through the flanges at the inlet pipe 2 and the end of the cone tube 9.

[0052] According to some embodiments of the present application, the flange connections in the first-stage test fixture and the second-stage test fixture are provided with sealing gaskets. By providing sealing gaskets at each flange connection position, it is ensured that each part of the first-stage test fixture and the second-stage test fixture is sealedly connected through the flanges and the sealing gaskets to avoid leakage of cooling water.

[0053] According to some embodiments of the present application, the water inlet cylinder 13, the cylinder body 11 and the side of the bottom cylinder body 7 of the first-stage test tool are equipped with a pressure-inducing pipe 8, and the inlet pipe 2 of the second-stage test tool is equipped with a pressure-inducing pipe 8. It should be noted that one end of each pressure-inducing pipe 8 at the above-mentioned position is connected to the corresponding pipeline lumen, and the other end is connected to the pressure difference measurement system through a hose or a stainless steel pipe, so as to obtain the pressure difference data inside the tool during the test.

[0054] According to some embodiments of the present application, the three pressure-guiding pipes 8 installed on the water inlet cylinder 13, the cylinder body 11, the bottom cylinder body 7 and the inlet pipe 2 form a group, and all the pressure-guiding pipes 8 are installed at the same axial height and are evenly distributed. By arranging the pressure-guiding pipes 8 on the water inlet cylinder 13, the cylinder body 11, the bottom cylinder body 7 and the inlet pipe 2 according to the above requirements, the above parts can be measured at multiple points along the circumferential direction, thereby ensuring the accuracy of the pressure measurement data.

[0055] According to some embodiments of the present application, the measuring point of the pressure-inducing pipe 8 on the inlet pipe 2 is set at 500mm to 650mm from the center line of the upper cylinder 1; the measuring point of the pressure-inducing pipe 8 on the water inlet cylinder 13 is set at 400mm to 500mm from the upper end of the upper joint 12; the measuring point of the pressure-inducing pipe 8 on the bottom cylinder 7 is set at 450mm to 550mm from the lower end of the grid plate assembly 6; the measuring point of the pressure-inducing pipe 8 on the cylinder 11 is set at 300mm to 350mm from the upper end of the grid plate assembly 6. The specific arrangement positions of the pressure-inducing pipe 8 on the water inlet cylinder 13, the cylinder 11, the bottom cylinder 7 and the inlet pipe 2 are the measuring point positions determined according to the measurement requirements of the pressure difference in different areas of the tooling during the test.

[0056] According to some embodiments of the present application, the grid plate assembly 6 has a stepped hole inside, a cone-shaped structure is set at the entrance, and multiple sets of sealing grooves are processed, in which O-type sealing gaskets 15 and square sealing gaskets 16 are installed. The above two sealing gaskets are arranged in the sealing groove, which is mainly used to seal the gap between the grid plate assembly 6 and the lower joint 10.

[0057] In the first phase of the test, it is necessary to install an O-type sealing gasket 15 and a square sealing gasket 16 in the sealing groove inside the grid plate assembly 6 to seal the gap between the inner hole wall of the grid plate assembly 6 and the outer wall of the lower joint 10, thereby ensuring that the test cooling water does not flow away from this gap, but flows entirely through the lower joint. In the second phase of the test, it is necessary to remove the O-type sealing gasket 15 and the square sealing gasket 16 installed in the sealing groove inside the grid plate assembly 6.

[0058] According to some embodiments of the present application, the angle of the inlet cone hole of the grid plate assembly 6 is 60° to 65°, the number of the sealing grooves is 2 to 3 groups; the material of the O-ring sealing gasket 15 is rubber, and the material of the square sealing gasket 16 is polyethylene.

[0059] By providing the tapered hole of the above angle at the entrance of the grid plate assembly 6, when assembling the first stage test fixture, the tapered hole can guide the lower joint 10 so that it can smoothly enter the inner hole of the grid plate assembly 6. At the same time, when conducting the second stage test, the tapered hole can guide the lower part of the irradiation test device so that it can be smoothly inserted into the grid plate assembly 6.

[0060] By making the material of the O-type sealing gasket 15 rubber and the material of the square sealing gasket 16 polyethylene; since polyethylene has a high hardness, it can be ensured that the rubber gasket will not be inserted into the gap between the inner hole wall of the grid plate assembly 6 and the outer wall of the lower joint 10, and the rubber gasket can seal the gap.

[0061] According to some embodiments of the present application, the lower joint 10 can be inserted into the grid plate assembly 6, and a gap of 0.5 mm to 1 mm is left between the inner hole wall of the grid plate assembly 6 and the outer wall of the lower joint 10, and the O-ring sealing gasket 15 and the square sealing gasket 16 are interference fit with the outer wall of the lower joint 10.

[0062] By limiting the gap value between the inner hole wall of the grid plate assembly 6 and the outer wall of the lower joint 10 to the above-mentioned value, a positioning effect can be formed when the lower joint 10 is inserted into the inner hole of the grid plate assembly 6. By making the O-ring 15 and the square sealing gasket 16 have an interference fit with the outer wall of the lower joint 10, the above-mentioned gap can be well sealed.

[0063] According to some embodiments of the present application, the sealing groove is located at a position 20 mm to 30 mm away from the outlet of the grid plate assembly 6. By providing the sealing groove at the above position of the inner hole of the grid plate assembly 6, it is convenient to install the O-type sealing gasket 15 and the square sealing gasket 16 in the first stage test, and it is also convenient to remove the O-type sealing gasket 15 and the square sealing gasket 16 in the second stage test.

[0064] In order to better understand the present application, the specific use and operation process of the first-stage test tooling and the second-stage test tooling is further explained in detail below.

[0065] Embodiment 1:

[0066] The first phase test tooling includes a grid plate assembly 6, a bottom cylinder 7, a pressure pipe 8, a cone tube 9, a lower joint 10, a cylinder 11, an upper joint 12, a water inlet cylinder 13, a water inlet reducer 14, an O-ring 15, and a square sealing gasket 16. The first phase test is mainly used to screen the throttling components inside the irradiation test device.

[0067] First, the test assembly is loaded into the cylinder 11 and fixed by the support assembly, and then the lower joint 10 is connected to the lower end of the cylinder 11 by screws; the flanges at both ends of the cylinder 11 are respectively connected to the flange at the lower end of the water inlet cylinder 13 and the flange at the upper end of the grid plate assembly 6, and the flange at the lower end of the grid plate assembly 6 is connected to the flange at the upper end of the bottom cylinder 7, thus completing the assembly of the entire first-stage test tooling;

[0068] Then, the water inlet reducer 14 and the cone tube 9 in the first stage test tooling are connected to the test circuit through flanges, and the pressure pipe 8 installed on the water inlet cylinder 13, the cylinder body 11, and the bottom cylinder body 7 is connected to the pressure difference measurement system;

[0069] Next, open the test loop to circulate deionized water through the first-stage test tooling, detect the pressure at each location, and compare the two measuring points to obtain the pressure difference in different areas.

[0070] Through the above method, different throttling components are replaced for testing to select the optimal throttling component.

[0071] Embodiment 2:

[0072] The second phase test tooling includes the upper cylinder 1, the inlet pipe 2, the cone section 3, the middle cylinder 4, the lower cylinder 5, the grid plate assembly 6, the bottom cylinder 7, the pressure pipe 8 and the cone tube 9. The second phase test is mainly used to verify the performance of the irradiation test device.

[0073] First, the flanges at both ends of the lower cylinder 5 are connected to the flanges at the lower end of the middle cylinder 4 and the flanges at the upper end of the grid plate assembly 6, and the flanges at the lower end of the grid plate assembly 6 are connected to the flanges at the upper end of the bottom cylinder 7, so that the entire second-stage test tooling is assembled. After the assembly is completed, the second-stage test tooling is fixed vertically;

[0074] Then, insert the irradiation test device axially into the second-stage test fixture, and insert the lower joint of the irradiation test device into the grid plate assembly 6. Before installation, remove the O-ring 15 and the square sealing gasket 16 in the grid plate assembly 6, and connect the flange of the irradiation test device to the flange at the upper end of the upper cylinder 1, so that the entire irradiation test device is sealed in the second-stage test fixture. Connect the inlet pipe 2 and the cone pipe 9 in the second-stage test fixture to the test circuit through flanges, and connect the pressure pipe 8 installed on the bottom cylinder 7 and the inlet pipe 2 to the pressure difference measurement system;

[0075] Next, the loop is opened to circulate deionized water through the second-stage test tooling, and the pressure at each location is tested. By comparing the measuring points two by two, the pressure difference in different areas is obtained. At the same time, the irradiation test device itself is adjusted to change the water flow entering the irradiation test device.

[0076] Through the above method, the relationship between the pressure difference and flow rate inside the irradiation test device is established to verify the rationality of the design of the irradiation test device.

[0077] The hydraulic characteristics verification test fixture designed in the embodiment of the present application has at least the following advantages compared with the test fixture in the prior art:

[0078] 1. This tool can be used to verify the rationality of the design of the irradiation test device, and at the same time, it can be disassembled and replaced at any time during the test, and the test plan can be adjusted without affecting the acquisition of test data;

[0079] 2. This tooling has a small size, better sealing performance and stronger adaptability, and can replace the existing test tooling with large size, complex structure and high processing requirements;

[0080] 3. This tooling is equipped with multiple pressure measuring points, which can meet the pressure difference measurement of different positions and different internal structural parts of the test device, and can provide good feedback on the rationality of the device design;

[0081] 4. This tooling divides the entire hydraulic characteristics test into two stages. For hydraulic tests that require frequent replacement of internal components, the first-stage test tooling is used. Its simple structure, light weight, and easy operation can be used to quickly complete the test. After the screening of basic components is completed, the second-stage test tooling is used to evaluate the performance of the irradiation test device.

[0082] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hydraulic characteristics verification test tool, characterized in that: The invention comprises a first-stage test tool and a second-stage test tool; the first-stage test tool comprises a grid plate assembly (6), a bottom cylinder (7), a cone tube (9), a lower joint (10), a cylinder (11), an upper joint (12), a water inlet cylinder (13) and a water inlet diameter reducing cylinder (14); the large-diameter ends of the water inlet cylinder (13) and the water inlet diameter reducing cylinder (14) are welded; the upper joint (12) is welded to the upper end of the cylinder (11); the lower end is connected to the lower joint (10) by screws; the lower end of the water inlet cylinder (13) is connected to the upper end of the cylinder (11) by a flange; the lower end of the cylinder (11) is connected to the upper end of the grid plate assembly (6) by a flange; the lower end of the grid plate assembly (6) is connected to the upper end of the bottom cylinder (7) by a flange; the lower end of the bottom cylinder (7) is welded to the large-diameter end of the cone tube (9); The second-stage test tooling comprises an upper cylinder (1), a cone section (3), a middle cylinder (4), a lower cylinder (5), and the grid plate assembly (6), the bottom cylinder (7) and the cone tube (9) in the first-stage test tooling, wherein the lower end of the upper cylinder (1) is welded to the large-diameter end of the cone section (3), the small-diameter end of the cone section (3) is welded to the upper end of the middle cylinder (4), and an inlet pipe (2) is vertically welded to the side of the upper cylinder (1); the upper and lower ends of the lower cylinder (5) are respectively connected to the lower end of the middle cylinder (4) and the upper end of the grid plate assembly (6) through flanges.

2. The hydraulic characteristics verification test tool according to claim 1, characterized in that: The small diameter ends of the water inlet reducer (14) and the cone tube (9) are provided with flanges, and the upper end of the upper cylinder (1) is provided with a flange.

3. The hydraulic characteristics verification test tool according to claim 2, characterized in that: The flange connections in the first-stage test fixture and the second-stage test fixture are provided with sealing gaskets.

4. The hydraulic characteristics verification test tool according to claim 1, characterized in that: A pressure-inducing pipe (8) is installed on the side of the water inlet cylinder (13), the cylinder body (11) and the bottom cylinder body (7) of the first-stage test tool, and a pressure-inducing pipe (8) is installed on the side of the inlet pipe (2) of the second-stage test tool.

5. The hydraulic characteristics verification test tool according to claim 4, characterized in that: The pressure-guiding pipes (8) installed on the water inlet cylinder (13), the cylinder body (11), the bottom cylinder body (7) and the inlet pipe (2) are grouped into three pieces. All the pressure-guiding pipes (8) are installed at the same axial height and are evenly distributed.

6. The hydraulic characteristics verification test tool according to claim 4 or 5, characterized in that: The measuring point of the pressure-inducing pipe (8) on the inlet pipe (2) is set at a distance of 500 mm to 650 mm from the center line of the upper cylinder (1); the measuring point of the pressure-inducing pipe (8) on the water inlet cylinder (13) is set at a distance of 400 mm to 500 mm from the upper end of the upper joint (12); the measuring point of the pressure-inducing pipe (8) on the bottom cylinder (7) is set at a distance of 450 mm to 550 mm from the lower end of the grid plate assembly (6); and the measuring point of the pressure-inducing pipe (8) on the cylinder (11) is set at a distance of 300 mm to 350 mm from the upper end of the grid plate assembly (6).

7. The hydraulic property verification test tool according to claim 1, characterized in that: The grid plate assembly (6) has a stepped hole inside, a cone-shaped structure is arranged at the inlet, and multiple sets of sealing grooves are processed, in which O-type sealing gaskets (15) and square sealing gaskets (16) are installed.

8. The hydraulic property verification test tool according to claim 7, characterized in that: The angle of the inlet cone hole of the grid plate assembly (6) is 60° to 65°, and the number of the sealing grooves is 2 to 3 groups; the material of the O-type sealing gasket (15) is rubber, and the material of the square sealing gasket (16) is polyethylene.

9. The hydraulic characteristics verification test tool according to claim 7 or 8, characterized in that: The lower joint (10) can be inserted into the grid plate assembly (6), and a gap of 0.5 mm to 1 mm is left between the inner hole wall of the grid plate assembly (6) and the outer wall of the lower joint (10), and the O-type sealing gasket (15) and the square sealing gasket (16) are interference fit with the outer wall of the lower joint (10).

10. The hydraulic property verification test tool according to claim 7 or 8, characterized in that: The sealing groove is arranged at a position 20 mm to 30 mm away from the outlet of the grid plate assembly (6).

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