Detection device and method for variable-diameter pressure spring of shielding assembly

Abstract

The invention belongs to the technical field of nuclear power, and particularly relates to a detection device and method for a variable-diameter pressure spring of a shielding assembly. The detection device for the shielding assembly reducing pressure spring provided by the invention adopts a manner of fixing the reducing spring. The overall shape of the test fixture is four connected cylinders, and the thin section compression area is cylindrical and is used for fixing the thin section of the compression spring; and the thin section compression area is cylindrical and is used for effectively fixing the thin section of the compression spring. The fixing base is installed in a spring testing machine fixing hole to be fixed. Through combination with a mechanical structure, matching butt joint with detection equipment is realized in a mechanical property detection item of the variable-diameter pressure spring of the shielding assembly.

Description

Technical Field

[0001] This invention belongs to the field of nuclear power technology, specifically relating to a detection device and method for a variable diameter compression spring of a shielding assembly. Background Technology

[0002] In related technologies, a common testing method involves compressing the spring sample to induce varying degrees of deformation and measuring the pressure it experiences under these deformations. However, when the sample is compressed and deformed, it may exhibit lateral bending or popping, affecting the test results or rendering the test impossible. Therefore, ensuring the effective fixation of the variable-diameter compression spring during the test is a problem that urgently needs to be solved. Summary of the Invention

[0003] To overcome the problems existing in related technologies, a detection device and method for a variable diameter compression spring of a shielding component is provided.

[0004] According to one aspect of the present disclosure, a detection device for a variable diameter compression spring of a shielding assembly is provided, the device comprising: an insertion end, a thin section compression region, a thick section compression region, a compression platform, a fixed cylinder, and a pressure pad;

[0005] The insertion end, the thin segment compression area, the thick segment compression area, the compression platform, and the fixed cylinder are fixedly connected in sequence from top to bottom; a central hole is opened along the axial direction at the center of the lower pressure pad;

[0006] The top end of the insertion end is conical, and the bottom end of the insertion end is consistent with the outer diameter of the thin segment compression region; the thin segment compression region, the thick segment compression region, the compression platform, the fixed cylinder and the lower pressure pad are all cylindrical;

[0007] With the thin compression region and the thick compression region inserted into the compression spring to be tested, the outer diameter of the thin compression region matches the inner diameter of the thin section of the compression spring, serving to limit the movement of the thin section of the compression spring; the outer diameter of the thick compression region matches the inner diameter of the thick section of the compression spring, serving to limit the movement of the thick section of the compression spring; the outer diameter of the compression platform is larger than the outer diameter of the bottom of the thick section of the compression spring, serving to support the bottom of the thick section of the compression spring; the fixing cylinder is used to fix it to the spring testing machine;

[0008] The inner diameter of the central hole of the pressure pad is smaller than the outer diameter of the compression spring segment, and the central hole and the compression area of ​​the segment form a clearance fit, so that the central hole can slide relative to the compression area of ​​the segment. As the distance between the pressure pad and the compression platform changes, the compression spring is compressed to different degrees.

[0009] In one possible implementation, the length of the insertion end is 3-5 mm, the outer diameter is Φ6-Φ6.2 mm, and the tip of the insertion end is rounded with R2.

[0010] In one possible implementation, the length of the compressed segment region is 95–100 mm, the outer diameter is Φ6–Φ6.2 mm, and the surface roughness is Ra6.3.

[0011] In one possible implementation, the length of the coarse compression region is 9.8–10 mm, the outer diameter is Φ9.8–Φ10 mm, and the surface roughness is Ra6.3.

[0012] In one possible implementation, the compression platform has a length of 10-12 mm, an outer diameter of Φ26-Φ28 mm, and a surface roughness of Ra6.3.

[0013] In one possible implementation, the length of the fixed cylinder is 19.8–20 mm, and the outer diameter is Φ9.5–Φ9.6 mm.

[0014] In one possible implementation, the outer diameter of the pressure pad is Φ26-Φ28mm, the thickness is 3-4mm, and the diameter of the central hole is Φ6.5-Φ6.6mm.

[0015] In one possible implementation, the fixed base is made of H13 steel;

[0016] According to another aspect of the present disclosure, a method for detecting a variable diameter compression spring of a shielding assembly is provided. The method is implemented based on the aforementioned apparatus and includes:

[0017] Step 1: Fix the base in the fixing hole of the spring testing machine;

[0018] Step 2: Insert the insertion end, the thin section compression area, and the thick section compression area into the variable diameter compression spring. After the thick section of the spring is installed and tightened in the thick section compression area, place the lower pressure pad on top of the variable diameter compression spring.

[0019] Step 3: Control the pressure pad to perform multiple displacement compressions with different strokes in the downward direction, and perform mechanical performance tests on the variable diameter compression spring after each displacement compression.

[0020] Step 4: After the experiment, remove the lower pressure pad, and then remove the variable diameter compression spring.

[0021] The beneficial effects of this disclosure are as follows: The testing device for the variable diameter compression spring of the shielding assembly provided by this disclosure adopts a fixed variable diameter spring method. The overall shape of the test fixture is four connected cylinders. The compression area of ​​the thin segment is cylindrical, used to fix the thin segment of the compression spring; the compression area of ​​the thin segment is cylindrical, used to effectively fix the thin segment of the compression spring. The fixing base is installed in the fixing hole of the spring testing machine for fixation. Through the combination with the mechanical structure, the matching and docking with the testing equipment is achieved in the mechanical performance testing project of the variable diameter compression spring of the shielding assembly. In this way, this disclosure achieves the control of the lateral bending deformation of the spring within the allowable range during measurement, avoiding the spring deformation and popping out during the testing process. Thus, it avoids the phenomenon of excessive bending deformation of the spring during the test. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a variable-diameter compression spring for a shielding component in related technologies.

[0023] Figure 2 This is a partial schematic diagram of a detection device for a variable diameter compression spring of a shielding component, as shown in an embodiment of this disclosure.

[0024] Figure 3 This is a schematic diagram of a pressure pad shown in an embodiment of this disclosure.

[0025] Figure 4 This is a schematic diagram of a detection device for a variable diameter compression spring of a shielding component in the detection state, as shown in an embodiment of this disclosure.

[0026] In the picture:

[0027] 1. Variable diameter section; 2. Insertion end; 3. Narrow section compression area; 4. Thick section compression area;

[0028] 5. Compression platform; 6. Fixed cylinder; 7. Center hole Detailed Implementation

[0029] The present disclosure will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0030] Unless otherwise defined, the technical and scientific terms used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains; the terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure; the term "comprising" and any variations thereof in this disclosure are intended to cover non-exclusive inclusion. Clearly, the embodiments described in this disclosure are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0031] In this disclosure, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0032] like Figure 1 As shown, in the related technology, the variable-diameter compression spring of the shielding assembly is right-handed and is divided into a thin section, a variable-diameter section, and a thick section. The total length of the spring is 92.2±1.5mm, of which the thin section is 10±1.5mm long, with an outer diameter of Φ11.3mm and an inner diameter of Φ9mm. The outer and inner diameters of the variable-diameter section gradually increase axially from the thin section to the thick section. The thick section is 76±1.5mm long, with an outer diameter of Φ14.8-Φ15mm and an inner diameter of Φ12.5mm.

[0033] See Figure 2 and Figure 3 The detection device for the variable diameter compression spring of the shielding assembly disclosed herein includes: an insertion end 2, a thin section compression area 3, a thick section compression area 4, a compression platform 5, a fixed cylinder 6, and a lower pressure pad. The insertion end 2, the thin section compression area 3, the thick section compression area 4, the compression platform 5, and the fixed cylinder 6 are fixedly connected in sequence from top to bottom. A center hole 7 is opened along the axial direction at the center of the lower pressure pad.

[0034] The top end of the insertion end 2 is conical, and the bottom end of the insertion end 2 is consistent with the outer diameter of the thin segment compression region 3. The conical design of the insertion end 2 facilitates insertion into the center hole 7 of the variable diameter compression spring and the lower pressure pad. The thin segment compression region 3, the thick segment compression region 4, the compression platform 5, the fixed cylinder 6, and the lower pressure pad are all cylindrical.

[0035] With the thin compression region 3 and the thick compression region 4 inserted into the compression spring to be tested, the outer diameter of the thin compression region 3 is adapted to the inner diameter of the thin section of the compression spring, which is used to limit the thin section of the compression spring; the outer diameter of the thick compression region 4 is adapted to the inner diameter of the thick section of the compression spring, which is used to limit the thick section of the compression spring; the outer diameter of the compression platform 5 is larger than the outer diameter of the bottom of the thick section of the compression spring, which is used to support the bottom of the thick section of the compression spring; the fixed cylinder 6 is cylindrical in shape and is used to fix it to the spring testing machine.

[0036] The inner diameter of the center hole 7 of the pressure pad is smaller than the outer diameter of the compression spring segment, and the center hole 7 forms a clearance fit with the compression area 3 of the segment, so that the center hole 7 can slide relative to the compression area 3 of the segment. As the distance between the pressure pad and the compression platform 5 changes, the compression spring is compressed to different degrees.

[0037] The length of the insertion end 2 is 3-5mm, and the outer diameter is Φ6-Φ6.2mm. The top of the insertion end 2 is rounded with R2 to further facilitate the guiding insertion.

[0038] The length of the compressed segment 3 is 95-100mm, the outer diameter is Φ6-Φ6.2mm, and the surface roughness is Ra6.3.

[0039] The length of the coarse compression region 4 is 9.8-10 mm, the outer diameter is Φ9.8-Φ10 mm, and the surface roughness is Ra6.3.

[0040] The compression platform 5 has a length of 10-12 mm, an outer diameter of Φ26-Φ28 mm, and a surface roughness of Ra6.3.

[0041] The length of the fixed cylinder 6 is 19.8-20mm, and the outer diameter is Φ9.5-Φ9.6mm.

[0042] The outer diameter of the pressure pad is Φ26-Φ28mm, the thickness is 3-4mm, and the diameter of the central hole 7 is Φ6.5-Φ6.6mm.

[0043] In one possible implementation, the fixed base is made of H13 steel;

[0044] In one possible implementation, a method for detecting a variable-diameter compression spring of a shielding assembly is provided, the method comprising:

[0045] Step 1, as follows Figure 4 As shown, the fixed base is installed in the fixing hole of the spring testing machine for fixation.

[0046] Step 2: Place the variable diameter compression spring on the fixed base. After the thicker section of the spring is installed and tightened in the compression area of ​​the thicker section, place the lower pressure pad on top of the variable diameter compression spring.

[0047] Step 3, according to Figure 4 The arrows indicate downward displacement compression mechanical property tests at 57.70mm, 61.39mm, 63.85mm, and 76.15mm.

[0048] Step 4: After the experiment, remove the clamping device, remove the support sleeve, and remove the sample.

[0049] The testing device for the variable-diameter compression spring of the shielding assembly disclosed herein adopts a fixed variable-diameter spring method. The overall shape of the test fixture is four connected cylinders. The compression area of ​​the thin segment is cylindrical, used to fix the thin segment of the compression spring; the compression area of ​​the thin segment is cylindrical, used to effectively fix the thin segment of the compression spring. The fixing base is installed in the fixing hole of the spring testing machine for fixation. Through the combination with the mechanical structure, the device achieves matching and docking with the testing equipment in the mechanical performance testing of the variable-diameter compression spring of the shielding assembly. In this way, this disclosure achieves control of the lateral bending deformation of the spring within the allowable range during measurement, avoiding spring deformation and popping out during the testing process.

[0050] In the mechanical performance testing project of variable diameter compression springs for shielding components, the matching and docking with the testing equipment was achieved; this ensured the effective fixation of the variable diameter compression springs during the test, guaranteeing the subsequent testing, thereby establishing a testing method for the mechanical performance of variable diameter compression springs for shielding components. The use of tools can avoid excessive lateral bending deformation during the test, facilitate sample installation, and improve testing efficiency.

[0051] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A detection device for a variable diameter compression spring of a shielding assembly, characterized in that, The device includes: an insertion end, a thin segment compression area, a thick segment compression area, a compression platform, a fixed cylinder, and a pressure pad; The insertion end, the thin segment compression area, the thick segment compression area, the compression platform, and the fixed cylinder are fixedly connected in sequence from top to bottom; a central hole is opened along the axial direction at the center of the lower pressure pad; The top end of the insertion end is conical, and the bottom end of the insertion end is consistent with the outer diameter of the thin segment compression region; the thin segment compression region, the thick segment compression region, the compression platform, the fixed cylinder and the lower pressure pad are all cylindrical; With the thin compression region and the thick compression region inserted into the compression spring to be tested, the outer diameter of the thin compression region matches the inner diameter of the thin section of the compression spring, serving to limit the movement of the thin section of the compression spring; the outer diameter of the thick compression region matches the inner diameter of the thick section of the compression spring, serving to limit the movement of the thick section of the compression spring; the outer diameter of the compression platform is larger than the outer diameter of the bottom of the thick section of the compression spring, serving to support the bottom of the thick section of the compression spring; the fixing cylinder is used to fix it to the spring testing machine; The inner diameter of the central hole of the pressure pad is smaller than the outer diameter of the compression spring segment, and the central hole and the compression area of ​​the segment form a clearance fit, so that the central hole can slide relative to the compression area of ​​the segment. As the distance between the pressure pad and the compression platform changes, the compression spring is compressed to different degrees.

2. The apparatus according to claim 1, characterized in that, The length of the insertion end is 3-5mm, the outer diameter is Φ6-Φ6.2mm, and the top of the insertion end is rounded with R2.

3. The apparatus according to claim 1, characterized in that, The length of the compressed section is 95-100 mm, the outer diameter is Φ6-Φ6.2 mm, and the surface roughness is Ra6.

3.

4. The apparatus according to claim 1, characterized in that, The length of the coarse compression region is 9.8–10 mm, the outer diameter is Φ9.8–Φ10 mm, and the surface roughness is Ra6.

3.

5. The apparatus according to claim 1, characterized in that, The compression platform has a length of 10-12 mm, an outer diameter of Φ26-Φ28 mm, and a surface roughness of Ra6.

3.

6. The apparatus according to claim 1, characterized in that, The length of the fixed cylinder is 19.8-20mm, and the outer diameter is Φ9.5-Φ9.6mm.

7. The apparatus according to claim 1, characterized in that, The outer diameter of the pressure pad is Φ26-Φ28mm, the thickness is 3-4mm, and the diameter of the central hole is Φ6.5-Φ6.6mm.

8. The apparatus according to claim 1, characterized in that, The fixed base is made of H13 steel.

9. A method for detecting a variable diameter compression spring in a shielding assembly, characterized in that, The method is implemented based on the apparatus according to any one of claims 1 to 8, and the method includes: Step 1: Fix the base in the fixing hole of the spring testing machine; Step 2: Insert the insertion end, the thin section compression area, and the thick section compression area into the variable diameter compression spring. After the thick section of the spring is installed and tightened in the thick section compression area, place the lower pressure pad on top of the variable diameter compression spring. Step 3: Control the pressure pad to perform multiple displacement compressions with different strokes in the downward direction, and perform mechanical performance tests on the variable diameter compression spring after each displacement compression. Step 4: After the experiment, remove the lower pressure pad, and then remove the variable diameter compression spring.

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