Pressing plug tool for inner pipe section of secondary neutron source rod

Abstract

The utility model discloses a secondary neutron source rod inner pipe section plug pressing tool which comprises an inner upper sealing head and a lower sealing head and further comprises a first plug pressing head and a second plug pressing head. The first plug pressing head comprises a first positioning part capable of mounting an upper sealing head and a first connecting part used for being connected with a plug pressing machine ejector rod of plug pressing equipment, and the first positioning part is connected with the first connecting part; the second plug pressing head comprises a second positioning part capable of installing a lower sealing head and a second connecting part used for being connected with a plug pressing machine ejector rod, and the second positioning part is connected with the second connecting part. According to the secondary neutron source rod inner pipe section plug pressing tool disclosed by the embodiment of the utility model, the first plug pressing head can realize positioning and supporting of the upper sealing head, the second plug pressing head can realize positioning and supporting of the lower sealing head, and the secondary neutron source rod inner pipe section plug pressing tool is simple in structure and convenient to install.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, and more specifically to a tool for plugging the inner tube section of 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 shown.

[0003] Therefore, when plugging the inner pipe section, how to position and support the upper head and the lower head becomes 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 inner tube section plugging tooling to position and support the upper head and the lower head when the inner tube section is plugged.

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

[0006] A secondary neutron source rod inner tube section pressing tool, the secondary neutron source rod inner tube section includes an inner upper head and a lower head, the secondary neutron source rod inner tube section pressing tool includes:

[0007] a first plugging head, the first plugging head comprising a first positioning portion capable of mounting an upper end cap and a first connecting portion for connecting to a plugging machine top rod of a plugging device, the first positioning portion being connected to the first connecting portion;

[0008] The second plugging head includes a second positioning portion capable of installing the lower head and a second connecting portion for connecting with the plugging machine top rod, and the second positioning portion is connected to the second connecting portion.

[0009] Optionally, in the above-mentioned secondary neutron source rod inner tube section plugging tool, a first positioning hole capable of mounting an upper head is formed on the first positioning portion;

[0010] The second positioning portion is provided with a second positioning hole for mounting the lower head.

[0011] Optionally, in the above-mentioned secondary neutron source rod inner tube segment pressing tool, the first positioning hole includes a first accommodating hole for accommodating the truncated cone structure of the upper head and a second accommodating hole for accommodating the step ring of the upper head.

[0012] Optionally, in the above-mentioned secondary neutron source rod inner tube section pressing tool, the second positioning hole includes a third accommodating hole for accommodating the disc-shaped structure of the lower head.

[0013] Optionally, in the above-mentioned secondary neutron source rod inner tube segment plugging tooling, the first plugging head and the second plugging head are both detachably connected to the plugging machine top rod.

[0014] Optionally, in the above-mentioned plugging tool for the inner tube section of the secondary neutron source rod, the first plugging head is threadedly connected to the plugging machine top rod, the first connecting portion includes a first screw rod, and the plugging machine top rod is provided with a threaded hole that matches the first screw rod;

[0015] The second plugging head is threadedly connected to the plugging machine top rod, and the second connecting part includes a second screw rod, which is threadedly matched with the threaded hole of the plugging machine top rod.

[0016] Optionally, in the above-mentioned secondary neutron source rod inner tube segment plugging tool, the first positioning portion includes a first cutting portion, and the first cutting portion is used to cooperate with a clamping tool so that the first plugging head is installed on the plugging machine top rod;

[0017] The second positioning portion includes a second cutting portion.

[0018] Optionally, in the above-mentioned secondary neutron source rod inner tube segment plugging tool, the first connecting portion further includes a first tightening portion connected to the first screw rod, the first tightening portion is connected to the first positioning portion, and the plugging machine top rod is provided with a mounting hole that cooperates with the first tightening portion;

[0019] The second connecting portion further includes a second tightening portion connected to the second screw rod, the second tightening portion is connected to the second positioning portion, and the second tightening portion matches the mounting hole.

[0020] Optionally, in the above-mentioned plugging tool for the inner tube section of the secondary neutron source rod, the first tightening portion and the first positioning portion are coaxially arranged, and when the first plugging head is installed on the plugging machine top rod, the first positioning portion abuts against the plugging machine top rod;

[0021] The second pressing portion is coaxially arranged with the second positioning portion. When the second plugging head is mounted on the plugging machine top rod, the second positioning portion abuts against the plugging machine top rod.

[0022] Optionally, in the above-mentioned secondary neutron source rod inner tube section pressing tool, the first pressing plug head and the second pressing plug head are both integrated structures.

[0023] From the above scheme, it can be seen that the plugging fixture for the inner tube section of the secondary neutron source rod disclosed in the embodiment of the present invention has an upper head that can be installed on the first positioning portion, and a first connecting portion that enables the first plugging head to be connected to the plugging device, and the upper head can be installed through the plugging device; the lower head can be installed on the second positioning portion, and the second connecting portion that enables the second plugging head to be connected to the plugging device, and the lower head can be installed through the plugging device. The plugging fixture for the inner tube section of the secondary neutron source rod disclosed in the embodiment of the present invention has a first plugging head that can achieve positioning support for the upper head, and a second plugging head that can achieve positioning support for the lower head, and has a simple structure and convenient installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] Figure 1 This is a schematic structural diagram of a secondary neutron source rod disclosed in an embodiment of the present utility model;

[0026] 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;

[0027] Figure 3 A top view of a first pressing plug disclosed in an embodiment of the present utility model;

[0028] Figure 4 A cross-sectional view of a first pressing plug disclosed in an embodiment of the present utility model;

[0029] Figure 5 A top view of the second pressing plug disclosed in an embodiment of the present utility model;

[0030] Figure 6 A cross-sectional view of a second pressing plug disclosed in an embodiment of the present utility model;

[0031] Figure 7 This is a schematic structural diagram of a plugging machine ejector rod disclosed in an embodiment of the present utility model;

[0032] Figure 8 for Figure 7 Cross-sectional view of AA;

[0033] Figure 9 A cross-sectional view of the upper head disclosed in an embodiment of the present utility model;

[0034] Figure 10This is a schematic structural diagram of the lower head disclosed in an embodiment of the present utility model.

[0035] 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;

[0036] 10 is a first pressing plug head, 11 is a first positioning portion, 111 is a first positioning hole, 1111 is a first receiving hole, 1112 is a second receiving hole, 112 is a first cutting portion, 12 is a first connecting portion, 121 is a first screw, and 122 is a first tightening portion;

[0037] 20 is a second pressing plug head, 21 is a second positioning portion, 211 is a second positioning hole, 212 is a second cutting portion, 22 is a second connecting portion, 221 is a second screw, and 222 is a second tightening portion. DETAILED DESCRIPTION

[0038] The core of the utility model is to disclose a tool for pressing the inner tube section of a secondary neutron source rod, which can position and support the upper and lower heads when the inner tube section is sealed.

[0039] 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.

[0040] like Figure 4 and Figure 6 As shown, an embodiment of the present invention discloses a secondary neutron source rod inner tube segment pressing tool, comprising a first pressing plug head 10 and a second pressing plug head 20.

[0041] like Figure 2 As shown, the inner tube section of the secondary neutron source rod includes an inner cladding tube 110, an antimony-beryllium core block 120 located in the inner cladding tube 110, an upper head 130 and a lower head 140. The upper head 130 and the lower head 140 are used to seal the two ends of the inner cladding tube 110. The secondary neutron source rod inner tube section pressing tool disclosed in the embodiment of the present invention is used to position and support the upper head 130 and the lower head 140 when they are installed on the two ends of the inner cladding tube 110.

[0042] The first plugging head 10 is used to position and support the upper end cap 130, and the second plugging head 20 is used to position and support the lower end cap 140. The first plugging head 10 includes a first positioning portion 11 capable of mounting the upper end cap 130 and a first connecting portion 12 for connecting to the plugging machine rod 30 of the plugging equipment. The first positioning portion 11 is connected to the first connecting portion 12. The second plugging head 20 includes a second positioning portion 21 capable of mounting the lower end cap 140 and a second connecting portion 22 for connecting to the plugging machine rod 30. The second positioning portion 21 is connected to the second connecting portion 22.

[0043] During use, when it is necessary to install the upper end cap 130, the upper end cap 130 is installed on the first positioning portion 11, and then the first plugging head 10 is installed on the plugging device so that the first connecting portion 12 is connected to the plugging machine top rod 30, and then the plugging device is used to plug the upper end cap 130 into one end of the inner cladding tube 110. When it is necessary to install the lower end cap 140, the lower end cap 140 is installed on the second positioning portion 21, and then the second plugging head 20 is installed on the plugging device so that the second connecting portion 22 is connected to the plugging machine top rod 30, and then the plugging device is used to plug the lower end cap 140 into the other end of the inner cladding tube 110.

[0044] In the plugging fixture for the inner tube section of a secondary neutron source rod disclosed in the embodiment of the present invention, the upper head 130 can be installed on the first positioning portion 11, and the first connecting portion 12 can connect the first plugging head 10 to the plugging device, and the upper head 130 can be installed through the plugging device; the lower head 140 can be installed on the second positioning portion 21, and the second connecting portion 22 can connect the second plugging head 20 to the plugging device, and the lower head 130 can be installed through the plugging device. In the plugging fixture for the inner tube section of a secondary neutron source rod disclosed in the embodiment of the present invention, the first plugging head 10 can achieve positioning support for the upper head 130, and the second plugging head 20 can achieve positioning support for the lower head 140, with a simple structure and convenient installation.

[0045] In order to enable installation of the upper head 130 and the lower head 140 of the inner tube section of the secondary neutron source rod on the same plugging machine, the first plugging head 130 and the second plugging head 140 have the same outer dimensions.

[0046] like Figure 3-Figure 6 As shown, a first positioning hole 111 for mounting the upper head 130 is defined on the first positioning portion 11 , and a second positioning hole 211 for mounting the lower head 140 is defined on the second positioning portion 21 .

[0047] The shape and size of the first positioning hole 111 match the shape and size of the upper head 130, and the shape and size of the second positioning hole 211 match the shape and size of the lower head 140. In order to ensure that the upper head 130 and the lower head 140 do not fall, the first positioning hole 111 and the second positioning hole 211 need to have a certain depth.

[0048] In some specific embodiments, Figure 9 As shown, the upper end cap 130 has a truncated cone structure at one end and a cylindrical structure at the other. A step ring is provided between the truncated cone and the cylindrical structure. The end of the cylindrical structure facing away from the truncated cone is chamfered. The upper end cap 130 also has a through-hole for helium filling. The first positioning hole 111 includes a first receiving hole 1111 for accommodating the truncated cone structure and a second receiving hole 1112 for accommodating the step ring. During installation, the truncated cone structure at one end of the upper end cap 130 is installed in the first receiving hole 1111, the step ring is installed in the second receiving hole 1112, and the cylindrical structure is exposed outside the first positioning hole 111.

[0049] The lower end cap 140 has a cylindrical structure at one end and a disc-shaped structure at the other. The end of the cylindrical structure of the lower end cap 140, facing away from the disc-shaped structure, is chamfered. The second positioning hole 211 includes a third receiving hole for accommodating the disc-shaped structure of the lower end cap. During installation, the disc-shaped structure at one end of the lower end cap 140 is installed in the third receiving hole, leaving the cylindrical structure exposed outside the second positioning hole 211.

[0050] In order to facilitate disassembly and assembly, the secondary neutron source rod inner tube segment plugging tool disclosed in the embodiment of the present invention has a first plugging head 10 and a second plugging head 20 that are detachably connected to the plugging machine top rod 30, which can be specifically connected by a snap connection or by a fixing part.

[0051] In some specific embodiments, the first plugging head 10 is threadedly connected to the plugging machine top rod 30, such as Figure 4 As shown, the first connecting portion 12 includes a first screw 121, and a threaded hole that matches the first screw 121 is provided on the plugging machine top rod 30. The structural schematic diagram of the connection between the first plugging head 10 and the plugging machine top rod 30 is shown in FIG. Figure 7-Figure 8 As shown, Figure 7 The second plugging head 20 is threadedly connected to the plugging machine top rod 30, and the second connecting portion 22 includes a second screw, such as Figure 6 shown.

[0052] When the first and second plugging heads 10 and 20 are connected to the plugging machine top rod 30, in order to facilitate the use of a clamping tool to clamp the first and second plugging heads 10 and 20, the first positioning portion 11 includes a first cutting portion 112, such as Figure 4 As shown, the second positioning portion 21 includes a second cutting portion 212. Figure 6 During installation, a wrench can be used to clamp the first cutting portion 112 or the second cutting portion 212 , and then the first plugging head 10 and the second plugging head 20 are threadedly connected to the plugging machine mandrel 30 .

[0053] In order to further improve the firmness of the first plugging head 10 and the second plugging head 20 after being connected to the plugging machine top rod 30, as shown in FIG. Figure 4 As shown, in some specific embodiments, the first connecting portion 12 further includes a first tightening portion 122 connected to the first screw 121, the first tightening portion 122 is connected to the first positioning portion 11, and the plugging machine top rod 30 is provided with a mounting hole that matches the first tightening portion 122. During installation, the first screw 121 is screwed into the threaded hole of the plugging machine top rod 30, and the first tightening portion 122 matches the mounting hole of the plugging machine top rod 30 to achieve a tight fit between the two. Correspondingly, the second connecting portion 22 further includes a second tightening portion 222 connected to the second screw 221, as shown in FIG. Figure 6 As shown, the second pressing portion 222 is connected to the second positioning portion 21. The first connecting portion 12 and the second connecting portion 22 have the same shape and size. In some specific embodiments, the first pressing portion 122 is a cylindrical structure, the first positioning portion 11 is a cylindrical structure, the second pressing portion 222 is a cylindrical structure, and the second positioning portion 21 is a cylindrical structure.

[0054] Based on the above embodiments, Figure 4 and Figure 6 As shown, the first tightening portion 122 is coaxially arranged with the first positioning portion 11. When the first plugging head 10 is installed on the plugging machine top rod 30, the first positioning portion 11 abuts against the plugging machine top rod 30. Correspondingly, the second tightening portion 222 is coaxially arranged with the second positioning portion 21. When the second plugging head 20 is installed on the plugging machine top rod 30, the second positioning portion 21 abuts against the plugging machine top rod 30.

[0055] In the plugging tool for the inner tube section of the secondary neutron source rod disclosed in the embodiment of the present invention, the first plugging head 10 and the second plugging head 20 can be an integrated structure or a split structure. In order to facilitate processing, the integrated structure is preferred.

[0056] 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.

[0057] As shown in the present application and claims, unless the context clearly indicates otherwise, the words "comprise", "comprising", "include", "including" and the like are not intended to be limiting and are to be read as specifying the presence of stated features or steps but not to the exclusion of one or more other features or steps. The use of the negative "not" in the context of the word "comprise" or "comprising" is not a disclaimer of a specific feature or step but is a description of the presence of a specific feature or step. The word "a" or "an" preceding an element or intervention is intended to be interpreted as "one or more" unless the context clearly indicates otherwise.

[0058] Hereinafter, the terms "first" and "second" are used only for the purpose of description and should not be construed as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features.

[0059] The terms "connected" and "connection" should be interpreted broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0060] The principles and implementation modes of the present application are described by using specific examples in this paper. The above examples are only used to help understand the core idea of the present application. It should be pointed out that for those skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in many ways. These improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A secondary neutron source rod inner tube section plugging tool, characterized in that: The secondary neutron source rod inner tube section comprises an upper sealing head (130) and a lower sealing head (140), and the secondary neutron source rod inner tube section pressing tool comprises: a first plugging head (10), the first plugging head (10) comprising a first positioning portion (11) capable of mounting the upper sealing head (130) and a first connecting portion (12) for connecting to a plugging machine top rod (30) of a plugging device, the first positioning portion (11) being connected to the first connecting portion (12); A second plugging head (20), the second plugging head (20) comprising a second positioning portion (21) capable of mounting the lower sealing head (140) and a second connecting portion (22) for connecting to the plugging machine top rod (30), the second positioning portion (21) being connected to the second connecting portion (22).

2. The secondary neutron source rod inner tube section plugging tool according to claim 1, characterized in that: The first positioning portion (11) is provided with a first positioning hole (111) capable of mounting the upper head (130); The second positioning portion (21) is provided with a second positioning hole (211) capable of mounting the lower sealing head (140).

3. The secondary neutron source rod inner tube section plugging tool according to claim 2, characterized in that: The first positioning hole (111) comprises a first accommodating hole for accommodating the truncated cone structure of the upper head (130) and a second accommodating hole for accommodating the step ring of the upper head (130).

4. The secondary neutron source rod inner tube section plugging tool according to claim 2, characterized in that: The second positioning hole (211) includes a third accommodating hole of a disc-shaped structure for accommodating the lower head (140).

5. The secondary neutron source rod inner tube section plugging tool according to claim 1, characterized in that: The first plugging head (10) and the second plugging head (20) are both detachably connected to the plugging machine top rod (30).

6. The secondary neutron source rod inner tube section plugging tool according to claim 5, characterized in that: The first plugging head (10) is threadedly connected to the plugging machine top rod (30), the first connecting portion (12) comprises a first screw rod (121), and the plugging machine top rod (30) is provided with a threaded hole that matches the first screw rod (121); The second plugging head (20) is threadedly connected to the plugging machine top rod (30), and the second connecting portion (22) comprises a second screw rod (221), and the second screw rod (221) is threadedly matched with the threaded hole of the plugging machine top rod (30).

7. The secondary neutron source rod inner tube section pressing tool according to claim 6, characterized in that: The first positioning portion (11) comprises a first cutting portion (112), and the first cutting portion (112) is used to cooperate with a clamping tool so that the first plugging head (10) is mounted on the plugging machine top rod (30); The second positioning portion (21) comprises a second cutting portion (212).

8. The tool for plugging the inner tube section of a secondary neutron source rod according to claim 6, characterized in that: The first connecting portion (12) further comprises a first tightening portion (122) connected to the first screw rod (121), the first tightening portion (122) being connected to the first positioning portion (11), and a mounting hole matching the first tightening portion (122) is provided on the plugging machine top rod (30); The second connecting portion (22) further comprises a second tightening portion (222) connected to the second screw rod (221), the second tightening portion (222) being connected to the second positioning portion (21), and the second tightening portion (222) being matched with the mounting hole.

9. The tool for plugging the inner tube section of a secondary neutron source rod according to claim 8, characterized in that: The first tightening portion (122) is coaxially arranged with the first positioning portion (11), and when the first plugging head (10) is mounted on the plugging machine top rod (30), the first positioning portion (11) abuts against the plugging machine top rod (30); The second tightening portion (222) is coaxially arranged with the second positioning portion (21); when the second plugging head (20) is mounted on the plugging machine top rod (30), the second positioning portion (21) abuts against the plugging machine top rod (30).

10. The secondary neutron source rod inner tube section pressing tool according to any one of claims 1 to 9, wherein the first pressing plug head (10) and the second pressing plug head (20) are both integrated structures.

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