Bolt for detecting blind hole in SF6 airtight test of pressure vessel

Abstract

The utility model discloses a blind hole detection bolt for pressure vessel SF6 airtight test, which comprises a bolt body, a sealing cover and a locking mechanism, the bolt body is composed of a screw portion and a nut, the middle of the top of the nut is provided with an air hole penetrating through the bottom of the screw portion, and the top of the nut is provided with an insertion hole at one side of the air hole. A protruding column is fixedly arranged at the position, located at the inserting hole, of the bottom of the sealing cover, and the locking mechanism is installed on one side of the nut and used for locking the protruding column. When a blind hole airtight test needs to be detected, only the locking mechanism needs to be separated from the protruding column, the sealing plate can be taken out from the top of the nut, and the positioning column is separated from the air hole; and if the blind hole leaks gas, the gas overflows from the bottom of the blind hole through the gas hole, and the SF6 detector can be used for detection, so that the leak detection operation of the blind hole of the pressure vessel is completed, the safety risk is reduced, the unnecessary labor amount is removed, and the leak detection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of container bolt especially relates to a bolt for detecting blind hole for SF6 gas tightness test of pressure container. BACKGROUND

[0002] Blind hole refers to the hole without penetrating workpiece, one end of the hole is closed state, the other end is open, in the pressure container, blind hole is often used to provide the space of fixed threaded connection, avoids destroying the integrity of workpiece, or is used for the structure (such as bearing seat or closed cavity) needing certain depth but not completely penetrating.

[0003] Limited to SF6 gas tightness test of GIS pressure container, internal pressure reaches 0.6Mpa, installs cover plate to seal during detection, and ordinary high-strength bolt will block the gas passage of blind hole, so that if blind hole is breathable, it cannot be accurately and timely detected. SUMMARY

[0004] The utility model discloses a kind of bolts for detecting blind hole for SF6 gas tightness test of pressure container.

[0005] According to one aspect of the present disclosure, the following technical solution is provided: a bolt for detecting blind hole for SF6 gas tightness test of pressure container, comprising a bolt body, the bolt body is installed in a blind hole for communicating a container outer shell and a container inner shell, further comprising a sealing cover and a locking mechanism, the bolt body is composed of a screw rod part and a nut, a gas hole is formed through the bottom of the screw rod part in the top middle part of the nut, a insertion hole is formed in the position of the gas hole side of the top of the nut, a protruding column is fixedly arranged at the position of the insertion hole in the bottom of the sealing cover, the locking mechanism is installed on one side of the nut, and the locking mechanism is used to lock the protruding column.

[0006] According to the bolt for detecting blind hole for SF6 gas tightness test of pressure container of at least one embodiment of the present disclosure, the locking mechanism includes a magnet plate and an insertion plate, the insertion plate is fixedly installed on the inner side of the magnet plate, a limiting opening is formed on one side of the nut, the limiting opening is communicated with the insertion hole, a limiting slot is formed on one side of the protruding column, and the insertion plate is inserted into the limiting opening and engaged with the limiting slot.

[0007] According to the bolt for detecting blind hole for SF6 gas tightness test of pressure container of at least one embodiment of the present disclosure, a positioning column of integral structure is fixedly arranged in the middle part of the bottom of the sealing cover, and the positioning column is used to seal the gas hole by being inserted into the gas hole.

[0008] According to the bolt for detecting blind hole for SF6 gas tightness test of pressure container of at least one embodiment of the present disclosure, a rectangular groove is formed on one side of the nut at the position of the limiting opening, and the rectangular groove is used to accommodate the magnet plate.

[0009] The bolt for detecting blind hole for SF6 air tightness test of pressure container according to at least one embodiment of the present disclosure, the lower end of the positioning column is conical.

[0010] The technical effects and advantages of the present application are as follows:

[0011] When the blind hole air tightness test needs to be detected, only the locking mechanism is separated from the protruding column, the sealing plate can be taken out from the top of the nut, so that the positioning column is separated from the air hole.

[0012] If the blind hole leaks, the gas will overflow from the bottom of the blind hole through the air hole, which can be detected by the SF6 detector, completing the leak detection of the blind hole of the pressure container, reducing the safety risk, removing unnecessary labor, and improving the leak detection efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0013] The accompanying drawings illustrate exemplary embodiments of the present disclosure and together with the description, explain the principles of the present disclosure, wherein the drawings are included to provide further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0014] Fig. 1 is a perspective view of the bolt for detecting blind hole for SF6 air tightness test of pressure container of the present application.

[0015] Fig. 2 is a structural view of the bolt for detecting blind hole for SF6 air tightness test of pressure container of the present application.

[0016] Fig. 3 is an explosion view of the bolt for detecting blind hole for SF6 air tightness test of pressure container of the present application.

[0017] The reference signs in the drawings are specifically as follows:

[0018] Container outer shell; 2, container inner shell; 21, blind hole; 3, bolt body; 31, screw rod part; 32, nut; 33, air hole; 34, rectangular groove; 35, limiting port; 36, insertion hole; 4, sealing cover; 41, positioning column; 42, protruding column; 43, limiting slot; 5, locking mechanism; 51, magnet plate; 52, insertion plate. DETAILED DESCRIPTION

[0019] For descriptive purposes, this disclosure may use spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side (e.g., as in a “sidewall”)” to describe the relationship between one component and another component as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, a component described as “below” or “under” other components or features would subsequently be positioned “above” said other components or features. Thus, the exemplary term “below” can encompass both “above” and “below” orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0020] like Figs. 1-3 As shown, a bolt for testing blind holes in SF6 pressure vessels according to this disclosure includes a bolt body 3, which is installed in a blind hole 21 for connecting the outer shell 1 and the inner shell 2 of the vessel. It also includes a sealing cap 4 and a locking mechanism 5. The bolt body 3 is composed of a threaded portion 31 and a nut 32. The nut 32 has an air hole 33 that penetrates the bottom of the threaded portion 31 at the top center. The nut 32 has an insertion hole 36 on one side of the air hole 33 at the top. The sealing cap 4 has a protruding post 42 fixed at the bottom of the insertion hole 36. The locking mechanism 5 is installed on one side of the nut 32 and is used to lock the protruding post 42.

[0021] Specifically, in this embodiment, the locking mechanism 5 includes a magnetic plate 51 and an insert plate 52. The insert plate 52 is fixedly installed inside the magnetic plate 51. A limiting port 35 is opened on one side of the nut 32, and the limiting port 35 is connected to the insertion hole 36. A limiting groove 43 is opened on one side of the protruding post 42. The insert plate 52 is inserted into the limiting port 35 and engages with the limiting groove 43 to lock the protruding post 42.

[0022] To enhance the sealing of the vent 33 by the sealing cap 4, in this embodiment, an integral positioning post 41 is fixedly provided at the bottom center of the sealing cap 4. The positioning post 41 is used to be inserted into the vent 33 to seal the vent 33.

[0023] Furthermore, to improve aesthetics and prevent the magnet plate 51 from being exposed, in this embodiment, a rectangular groove 34 is provided on one side of the nut 32 at the limiting opening 35 position. The rectangular groove 34 is used to accommodate the magnet plate 51.

[0024] Furthermore, to ensure that the positioning post 41 can be smoothly inserted into the air hole 33, in this embodiment, the lower end of the positioning post 41 is conical.

[0025] The specific operation steps are as follows: when the blind hole 21 needs to be detected for air tightness test, the magnet plate 51 is separated from the rectangular groove 34, the plug plate 52 is taken out of the limiting port 35, and the sealing plate 4 is taken out from the top of the screw cap 32, so that the positioning column 41 is separated from the air hole 33;

[0026] If the blind hole 21 leaks, the gas will overflow from the bottom of the blind hole 21 through the air hole 33, which can be detected by the SF6 detector, and the leak detection of the blind hole 21 of the pressure vessel is completed.

[0027] In the description of the present specification, the description of the terms "one embodiment / way", "some embodiments / ways", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / way or example are included in at least one embodiment / way or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment / way or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments / ways or examples. In addition, the skilled in the art can combine and combine the different embodiments / ways or examples described in the present specification and the features of the different embodiments / ways or examples without contradiction.

[0028] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0029] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present disclosure, and are not intended to limit the scope of the present disclosure. Based on the above disclosure, other changes or modifications can also be made by those skilled in the art, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A bolt for testing blind holes in SF6 pressure vessels, comprising a bolt body, the bolt body being installed in a blind hole for connecting the outer shell and inner shell of the vessel, characterized in that: It also includes a sealing cap and a locking mechanism. The bolt body is composed of a screw and a nut. The top center of the nut has an air hole that penetrates the bottom of the screw. The top of the nut has an insertion hole on one side of the air hole. The bottom of the sealing cap has a protruding post fixed at the insertion hole. The locking mechanism is installed on one side of the nut and is used to lock the protruding post.

2. The bolt for testing blind holes in SF6 pressure vessels according to claim 1, characterized in that: The locking mechanism includes a magnet plate and an insert plate. The insert plate is fixedly installed on the inner side of the magnet plate. A limiting port is opened on one side of the nut, which is connected to the insertion hole. A limiting groove is opened on one side of the protruding post. The insert plate is inserted into the limiting port and engages with the limiting groove.

3. The bolt for testing blind holes in SF6 pressure vessels according to claim 2, characterized in that: The sealing cap has an integral positioning post fixed in the middle of its bottom, which is used to be inserted into the air hole to seal the air hole.

4. The bolt for testing blind holes in SF6 pressure vessels according to claim 1, characterized in that: A rectangular groove is provided on one side of the nut at the limiting position, and the rectangular groove is used to accommodate the magnet plate.

5. The bolt for testing blind holes in SF6 pressure vessels according to claim 3, characterized in that: The lower end of the positioning post is conical.

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