Helium filling and hole plugging welding tool for secondary neutron source rod

Abstract

The secondary neutron source rod helium filling plugging hole welding tool comprises a first plugging hole welding top and a second plugging hole welding top, a first hole channel is formed in the first plugging hole welding top, an inner pipe section is inserted into the first end of the first hole channel, an upper sealing head is exposed out of the second end of the first hole channel, and the first plugging hole welding top can be installed on plugging hole welding equipment. The second hole plugging welding top is provided with a second hole channel, the second neutron source rod is inserted into the first end of the second hole channel, the lower end plug is exposed out of the second end of the second hole channel, and the second hole plugging welding top can be installed on hole plugging welding equipment. According to the secondary neutron source rod helium filling plugging hole welding tool disclosed by the embodiment of the utility model, the first plugging hole welding top head can be mounted on plugging hole welding equipment to fixedly support the inner pipe section, so that the upper sealing head is exposed to perform plugging hole welding on the upper sealing head, and the second plugging hole welding top head can be mounted on the plugging hole welding equipment to perform plugging hole welding on the upper sealing head. The secondary neutron source rod is fixedly supported, the lower end plug is exposed, hole plugging welding is conducted on the lower end plug, the structure is simple, and use is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, and more specifically to a helium-filled hole-plugging welding tool for a secondary neutron source rod. Background Art

[0002] The secondary neutron source rod adopts a double-cladding structure design, consisting of an inner tube section 100, a cladding tube 200, an upper end plug 300 and a lower end plug 400, and is filled with high-pressure helium. The inner tube section 100 is set in the cladding tube 200, and the upper end plug 300 and the lower end plug 400 seal the two ends of the cladding tube 200. The specific structural diagram is shown in FIG. Figure 1 The inner tube section 100 is composed of an inner cladding tube 110, an antimony-beryllium core block 120, an upper head 130 and a lower head 140, and is filled with high-pressure helium. The antimony-beryllium core block 120 is set in the inner cladding tube 110, and the upper head 130 and the lower head 140 seal the two ends of the inner cladding tube 110. The specific structural diagram is shown in FIG. Figure 2 The upper end cap 130 and the lower end plug 400 are provided with helium filling holes. The helium filling and plugging welding of the upper end cap 130 is the last welding process of the inner tube section 100, and the helium filling and plugging welding of the lower end plug 400 is the last welding process after the inner tube section 100 is installed into the outer tube of the secondary neutron source rod.

[0003] Therefore, during welding, how to fix and support the upper head and lower end plug that need to be plugged by welding has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a secondary neutron source rod helium filling and plugging welding tool to fix and support the upper head and lower end plug that need to be plugged during welding.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A secondary neutron source rod helium filling and hole plugging welding tool, the secondary neutron source rod includes an inner tube section and a lower end plug, the inner tube section includes an upper head, the secondary neutron source rod helium filling and hole plugging welding tool includes:

[0007] a first hole-blocking welding plug, the first hole-blocking welding plug is provided with a first channel, a first end of the first channel is for inserting the inner pipe section, and a second end allows the upper head to be exposed, and the first hole-blocking welding plug can be installed on the hole-blocking welding equipment;

[0008] The second hole-blocking welding head has a second hole, the first end of the second hole is for the secondary neutron source rod to be inserted, and the second end makes the lower end plug exposed. The second hole-blocking welding head can be installed on the hole-blocking welding equipment.

[0009] Optionally, in the above-mentioned secondary neutron source rod helium filling and plugging welding tooling, the first plugging welding head includes an upper head positioning portion and a first boss, the upper head positioning portion is coaxially arranged with the first boss, and the first channel passes through the first boss and the upper head positioning portion.

[0010] Optionally, in the above-mentioned secondary neutron source rod helium filling and hole plugging welding tooling, the first hole plugging welding head is detachably connected to the cylinder flange end cover of the hole plugging welding equipment.

[0011] Optionally, in the above-mentioned secondary neutron source rod helium filling and plugging welding tooling, the first plugging welding head is connected to the cylinder flange end cover through a first fixing piece, and a first mounting hole that cooperates with the first fixing piece is opened on the first plugging welding head.

[0012] Optionally, in the above-mentioned secondary neutron source rod helium filling and hole plugging welding tool, the first mounting holes include a plurality of holes arranged along the circumference of the upper head positioning portion, and each of the first mounting holes is a countersunk hole.

[0013] Optionally, in the above-mentioned secondary neutron source rod helium filling and plugging welding tool, a positioning groove is provided on the end surface of the upper head positioning portion away from the first boss.

[0014] Optionally, in the above-mentioned secondary neutron source rod helium filling and hole plugging welding tool, the first channel is arranged along the axial direction of the first hole plugging welding head, and the positioning groove extends along the radial direction of the end face.

[0015] Optionally, in the above-mentioned secondary neutron source rod helium filling and plugging welding tooling, the second plugging welding head includes a lower end plug positioning portion and a second boss, the lower end plug positioning portion is coaxially arranged with the second boss, and the second channel passes through the second boss and the lower end plug positioning portion.

[0016] Optionally, in the above-mentioned secondary neutron source rod helium filling and hole plugging welding tooling, the second hole plugging welding head is detachably connected to the cylinder flange end cover of the hole plugging welding equipment.

[0017] Optionally, in the above-mentioned secondary neutron source rod helium-filled hole-plugging welding tool, the preparation material of the first hole-plugging welding plug and the second hole-plugging welding plug includes one of chromium-zirconium copper, aluminum oxide copper or red copper.

[0018] As can be seen from the above scheme, the helium-filled hole-plugging welding fixture for the secondary neutron source rod disclosed in the embodiment of the present invention has a first hole-plugging welding head that can be installed on the hole-plugging welding equipment to fix and support the inner pipe section, so that the upper head is exposed for hole-plugging welding of the upper head; the second hole-plugging welding head can be installed on the hole-plugging welding equipment to fix and support the secondary neutron source rod, so that the lower end plug is exposed for hole-plugging welding of the lower end plug. The helium-filled hole-plugging welding fixture for the secondary neutron source rod disclosed in the embodiment of the present invention has a simple structure and is easy to use. It can fix and support the upper head and lower end plug that need hole-plugging welding, ensuring that the hole-plugging welding parts of the upper head and lower end plug can be installed on the hole-plugging welding equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic structural diagram of a secondary neutron source rod disclosed in an embodiment of the present utility model;

[0021] Figure 2 This is a schematic structural diagram of the inner tube section of the secondary neutron source rod disclosed in an embodiment of the present utility model;

[0022] Figure 3 This is a schematic structural diagram of a first hole-plugging welding plug disclosed in an embodiment of the present utility model;

[0023] Figure 4 A top view of a first hole-plugging welding plug disclosed in an embodiment of the present utility model;

[0024] Figure 5 for Figure 4 Cross-section of the middle AA;

[0025] Figure 6 This is a front view of the first plugging welding plug disclosed in an embodiment of the utility model;

[0026] Figure 7 A top view of a second hole-blocking welding plug disclosed in an embodiment of the present utility model;

[0027] Figure 8 A side view of a second plugging welding head disclosed in an embodiment of the present utility model;

[0028] Figure 9 Figure 7 Cross-section of the middle AA;

[0029] Figure 10 This is a structural schematic diagram of the first plugging welding head installed on the plugging welding equipment.

[0030] Among them, 100 is the inner tube section, 110 is the inner cladding tube, 120 is the antimony-beryllium core block, 130 is the upper head, 140 is the lower head, 200 is the cladding tube, 300 is the upper end plug, and 400 is the lower end plug;

[0031] 10 is the first plugging welding head, 101 is the upper head positioning part, 102 is the first boss, 11 is the first channel, 12 is the first mounting hole, and 13 is the positioning groove;

[0032] 20 is a second plugging welding head, 201 is a lower end plug positioning portion, 202 is a second boss, 21 is a second channel, and 22 is a second mounting hole;

[0033] 01 is the cylinder flange end cover, and 02 is the observation window. DETAILED DESCRIPTION

[0034] The core of the utility model is to disclose a secondary neutron source rod helium filling and plugging welding tool, which is used to fix and support the upper head and the lower end plug that need to be plugged during welding.

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] like Figure 3 and Figure 7 As shown, an embodiment of the present invention discloses a secondary neutron source rod helium-filled hole-plugging welding tool, comprising a first hole-plugging welding plug 10 and a second hole-plugging welding plug 20 .

[0037] It should be noted that the specific structural composition of the secondary neutron source rod has been introduced in the background technology and will not be repeated here.

[0038] The first hole-blocking welding plug 10 is provided with a first channel 11, the first end of the first channel 11 is for the inner pipe section 100 to be inserted, and the second end makes the upper head 130 exposed, and the first channel 11 extends along the thickness direction of the first hole-blocking welding plug. Figure 5As shown, the first plug 10 can be installed on the plugging welding equipment. The second plug 20 has a second channel 21. The first end of the second channel 21 is for inserting the secondary neutron source rod, and the second end allows the lower end plug 400 to be exposed. The second channel 21 extends along the thickness direction of the second plug 20. The second plug 20 can be installed on the plugging welding equipment.

[0039] During use, when it is necessary to perform plugging welding on the upper end cap 130, the inner pipe section 100 is installed on the first plugging welding plug 10, specifically inserted from the first end of the first channel 11, so that the upper end cap 130 is exposed to the second end of the first channel 11, and then the first plugging welding plug 10 is installed on the plugging welding equipment, and plugging welding is performed on the upper end cap 130. When it is necessary to perform plugging welding on the lower end plug 400, the secondary neutron source rod is installed on the second plugging welding plug 20, specifically inserted from the first end of the second channel 21, so that the lower end plug 400 is exposed to the second end of the second channel 21, and then the second plugging welding plug 20 is installed on the plugging welding equipment, and plugging welding is performed on the lower end plug 400.

[0040] The helium-filled hole-plugging welding fixture for a secondary neutron source rod disclosed in an embodiment of the present invention comprises a first hole-plugging welding head 10 that can be mounted on the hole-plugging welding device to securely support the inner tube section 100, exposing the upper end cap 130 for hole-plugging welding of the upper end cap 130. A second hole-plugging welding head 20 that can be mounted on the hole-plugging welding device to securely support the secondary neutron source rod, exposing the lower end cap 400 for hole-plugging welding of the lower end cap 400. The helium-filled hole-plugging welding fixture for a secondary neutron source rod disclosed in an embodiment of the present invention has a simple structure and is easy to use.

[0041] In order to be able to perform plugging welding on the upper end cap 130 and the lower end plug 400 on the same plugging welding equipment, the first plugging welding plug 10 and the second plugging welding plug 20 have the same shape and size.

[0042] like Figure 5-Figure 6 As shown, the helium-filled hole-plugging welding tool for the secondary neutron source rod disclosed in an embodiment of the present invention, the first hole-plugging welding head 10 includes an upper head positioning portion 101 and a first boss 102, the upper head positioning portion 101 and the first boss 102 are coaxially arranged, the first channel 11 passes through the first boss 102 and the upper head positioning portion 101, and the first end of the first channel 11 is arranged on the first boss 102, and the second end is arranged on the upper head positioning portion 101. In some specific embodiments, the upper head positioning portion 101 and the first boss 102 are both cylindrical in shape, and the radius of the bottom circle of the first boss 102 is smaller than the radius of the bottom circle of the upper head positioning portion 101. The upper head positioning portion 101 and the first boss 102 can be an integrated structure or a split structure, preferably an integrated structure.

[0043] In order to facilitate installation of the first plugging welding head 10 in the welding chamber, in some specific embodiments, the end of the upper head positioning portion 101 away from the first boss 102 is configured to be truncated cone-shaped.

[0044] In some specific embodiments, Figure 10 As shown, the plugging welding equipment includes a welding chamber, in which a plurality of cylinders are provided. The cylinders are provided to tightly connect the sealing ring and the cladding tube 200 and the inner cladding tube 110, so that the welding chamber becomes a sealed whole, and can be filled with high-pressure helium for plugging welding. In order to facilitate the disassembly and assembly of the first plugging welding head 10, the first plugging welding head 10 is detachably connected to the cylinder, specifically connected to the cylinder flange end cover 01. Specifically, the first boss 102 abuts against the cylinder flange end cover 01, which can realize the rapid matching and positioning of the first plugging welding head 10 and the cylinder flange end cover 01. The first plugging welding head 10 is connected to the cylinder flange end cover 01 through a first fixing member. The first plugging welding head 10 is provided with a first mounting hole 12 that matches the first fixing member. The first fixing member 12 can be a screw. When in use, the inner pipe section 100 is inserted into the first channel 11 of the first hole-blocking welding head 10, and then the first hole-blocking welding head 10 is installed in the welding chamber, and the first hole-blocking welding head 10 is connected to the cylinder flange end cover 01 through the first fixing part.

[0045] Specifically, the first mounting holes 12 are provided on the upper head positioning portion 101 and include a plurality of holes spaced apart along the circumference of the upper head positioning portion 101. In order to avoid the protrusion of the first fixing member and ensure the flatness of the mounting plane, the first mounting holes 12 are preferably countersunk holes.

[0046] like Figure 4 As shown, in order to be able to observe the position of the plugging weld of the upper head 130 through the observation window 02 of the plugging welding equipment during welding, and to facilitate adjustment of the distance between the tungsten electrode and the upper head 130, a positioning groove 13 is provided on the end face of the upper head positioning portion 101 away from the first boss 102, and the positioning groove 13 is connected to the second end of the first channel 11, so that the position of the plugging weld of the upper head 130 can be observed from the observation window 02.

[0047] Preferably, the first channel 11 is arranged along the axial direction of the first hole-blocking welding plug 10 , and the positioning groove 13 extends radially along the end surface of the upper head positioning portion 101 .

[0048] like Figure 8-Figure 9As shown, the second hole-blocking welding plug 20 includes a lower end plug positioning portion 201 and a second boss 202. The lower end plug positioning portion 201 is coaxially arranged with the second boss 202. The second channel 21 passes through the second boss 202 and the lower end plug positioning portion 201. The first end of the second channel 21 is located on the second boss 202, and the second end is located on the lower end plug positioning portion 201. The second boss 202 is used to cooperate with the cylinder flange end cover 01 of the welding chamber to achieve rapid matching and positioning of the second hole-blocking welding plug 20 and the cylinder flange end cover 01. In some specific embodiments, the lower end plug positioning portion 201 and the second boss 202 are both cylindrical in shape, and the radius of the bottom circle of the second boss 202 is smaller than the radius of the bottom circle of the lower end plug positioning portion 201. The lower end plug positioning portion 201 and the second boss 202 can be an integrated structure or a split structure, preferably an integrated structure.

[0049] In order to facilitate installation of the second plugging welding head 20 in the welding chamber, in some specific embodiments, the end of the lower end plug positioning portion 201 away from the second boss 202 is configured to be truncated cone-shaped.

[0050] In order to facilitate the disassembly and assembly of the second plugging welding head 20, the second plugging welding head 20 is detachably connected to the cylinder flange end cover 01. Specifically, the second plugging welding head 20 is connected to the cylinder flange end cover 01 through a second fixing piece, and a second mounting hole 22 that matches the second fixing piece is opened on the lower end plug positioning portion 201. Figure 7 As shown, the second mounting holes 22 are arranged at intervals along the circumference of the lower end plug positioning portion 201. In order to avoid protrusion of the second fixing member and ensure the flatness of the mounting surface, the second mounting holes 22 are preferably countersunk holes.

[0051] In the secondary neutron source rod helium-filled hole-plugging welding tool disclosed in the embodiment of the present invention, the first hole-plugging welding plug 10 and the second hole-plugging welding plug 20 can be made of chromium-zirconium copper, or alumina copper or red copper.

[0052] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0053] As used in this application and the claims, unless the context clearly indicates an exception, the terms "a," "an," "an," and / or "the" are not intended to refer to the singular and may include the plural, unless the context clearly indicates otherwise. Generally speaking, the terms "comprises" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. A method or apparatus may also include other steps or elements. The phrase "comprises a..." does not preclude the presence of additional identical elements in the process, method, product, or apparatus that includes the elements.

[0054] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0055] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help you understand the core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A secondary neutron source rod helium filling and plugging welding tool, characterized in that: The secondary neutron source rod comprises an inner tube section (100) and a lower end plug (400), the inner tube section (100) comprises an upper end cap (130), and the secondary neutron source rod helium filling and plugging welding tool comprises: a first hole-blocking welding plug (10), wherein the first hole-blocking welding plug (10) is provided with a first channel (11), a first end of the first channel (11) is for inserting the inner pipe section (100), and a second end allows the upper head (130) to be exposed, and the first hole-blocking welding plug (10) can be installed on a hole-blocking welding device; A second hole-blocking welding head (20) is provided with a second hole (21), a first end of the second hole (21) is for inserting the secondary neutron source rod, and a second end allows the lower end plug (400) to be exposed, and the second hole-blocking welding head (20) can be installed on the hole-blocking welding device.

2. The secondary neutron source rod helium filling and hole plugging welding tool according to claim 1, characterized in that: The first hole-blocking welding plug (10) comprises an upper head positioning portion (101) and a first boss (102), the upper head positioning portion (101) and the first boss (102) are coaxially arranged, and the first channel (11) passes through the first boss (102) and the upper head positioning portion (101).

3. The secondary neutron source rod helium filling and hole plugging welding tool according to claim 2, characterized in that: The first plugging welding head (10) is detachably connected to the cylinder flange end cover (01) of the plugging welding equipment.

4. The secondary neutron source rod helium filling and hole plugging welding tool as claimed in claim 3, characterized in that: The first hole-blocking welding head (10) is connected to the cylinder flange end cover (01) via a first fixing piece, and a first mounting hole (12) is provided on the first hole-blocking welding head (10) to match the first fixing piece.

5. The secondary neutron source rod helium filling and hole plugging welding tool as claimed in claim 4, characterized in that: The first mounting holes (12) include a plurality of holes arranged along the circumference of the upper head positioning portion (101), and each of the first mounting holes (12) is a countersunk hole.

6. The secondary neutron source rod helium filling and hole plugging welding tool as claimed in claim 2, characterized in that: A positioning groove (13) is provided on the end surface of the upper head positioning portion (101) away from the first boss (102).

7. The secondary neutron source rod helium filling and hole plugging welding tool according to claim 6, characterized in that: The first hole (11) is arranged along the axial direction of the first hole-blocking welding head (10), and the positioning groove (13) extends along the radial direction of the end surface.

8. The secondary neutron source rod helium filling and hole plugging welding tool according to claim 1, characterized in that: The second plugging welding head (20) comprises a lower end plug positioning portion (201) and a second boss (202), the lower end plug positioning portion (201) and the second boss (202) are coaxially arranged, and the second hole (21) passes through the second boss (202) and the lower end plug positioning portion (201).

9. The secondary neutron source rod helium filling and hole plugging welding tool according to claim 8, characterized in that: The second plugging welding head (20) is detachably connected to the cylinder flange end cover (01) of the plugging welding equipment.

10. The secondary neutron source rod helium filling and hole plugging welding tool according to any one of claims 1 to 9, characterized in that: The preparation material of the first hole-plugging welding plug (10) and the second hole-plugging welding plug (20) includes one of chromium-zirconium copper, aluminum oxide copper or red copper.

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