Valve including hinge detachment prevention unit

Abstract

The present invention relates to a valve including a hinge detachment prevention unit, the valve comprising: a hinge pin formed in a valve body and positioned in an accommodation space extending lengthwise in a first direction; a backflow prevention disk rotatably coupled to the hinge pin and positioned in a flow space communicating with the accommodation space; a plug positioned at one end of the hinge pin, with one portion thereof being positioned in the accommodation space and the other portion being positioned outside the accommodation space so as to prevent detachment of the hinge pin; a washer positioned on an outer circumferential surface of the hinge pin and having a coupling groove formed therein toward the hinge pin; and a detachment prevention unit that fixes the washer and the hinge pin together by engaging with the coupling groove to prevent the hinge pin from being detached from the accommodation space.

Description

Valve including a hinge anti-detachment unit

[0001] The present invention relates to a valve including a hinge anti-detachment unit.

[0002] Generally, a swing check valve is a valve (backflow prevention valve) installed in piping constituting nuclear power plants, etc., to prevent fluid backflow.

[0003] Conventional backflow prevention valves consist of a hinge pin, a washer, a plug, a backflow prevention gate, etc., and have a structure in which the hinge pin is fixed to the valve by the fastening force of the plug. However, in a high-temperature and high-pressure environment, if a crack occurs in the plug and the plug detaches, the hinge pin also detaches, causing a problem in which internal fluid may leak.

[0004] In particular, in environments requiring high safety standards, such as nuclear power plants, this can lead to a Loss of Coolant Accident (LOCA), potentially causing serious problems.

[0005] The object of the present invention is to provide a valve including a hinge anti-detachment unit.

[0006] The present invention relates to a valve comprising a hinge anti-detachment unit, the valve comprising: a hinge pin located in a receiving space formed within a valve body and extending in a first direction; a backflow prevention disc rotatably coupled to the hinge pin and located in a flow space communicating with the receiving space; a plug located at one end of the hinge pin, with a portion located in the receiving space and another portion located outside the receiving space, which prevents the hinge pin from detaching; a washer located on the outer surface of the hinge pin and having a coupling groove formed toward the hinge pin; and an anti-detachment unit that fixes the washer and the hinge pin so that the hinge pin does not detach from the receiving space through coupling with the coupling groove.

[0007] The above receiving space includes a first space portion with an expanded cross-sectional area; and a second space portion extending on both sides of the first space portion; wherein the washer is located at both ends of the first space portion, and the movement of the washer in the first direction may be restricted by the valve body surrounding the second space portion.

[0008] The hinge pin includes a first hinge portion located in the first space portion, a second hinge portion located in the second space portion, and a third hinge portion, and the washer is located in the first space portion and is coupled to both ends of the first hinge portion, and the backflow prevention disc can be coupled to the first hinge portion between the washers.

[0009] The above anti-detachment unit may include: a first through hole formed in the hinge pin and extending in the first direction from the cross-section facing the plug; a second through hole formed from the outer surface of the hinge pin toward the center of the hinge pin and communicating with the coupling groove and the first through hole; a fixing pin that moves between a release position in which the entire pin is located within the second through hole and a fixing position in which a portion is located within the coupling groove; and a fastening bolt located in the first through hole, the position of which the fixing pin determines.

[0010] The above anti-detachment unit may further include: a guide part located above the second through-hole and guiding the movement of the fixing pin when the position of the fixing pin changes by reducing the cross-sectional area of ​​the second through-hole; and an elastic member that presses the fixing pin toward the first through-hole.

[0011] The above elastic member may include a spring.

[0012] The above fixing pin comprises: a first fixing part in which at least a portion is located in a coupling groove at the fixing position; a second fixing part connected to one end of the first fixing part and having an expanded cross-sectional area; and a third fixing part connected to the second fixing part and moving the second through hole up and down according to the rotation of the fastening bolt; and the elastic member may be located between the guide part and the second fixing part.

[0013] The above fastening bolt includes a positioning part that contacts the third fixing part to determine a fixed position and a release position, and the positioning part includes a first area that contacts the third fixing part to raise the fixing pin to a fixed position, and a second area that accommodates at least a portion of the third fixing part into an internal area of ​​the fastening bolt to lower the fixing pin to a release position, and depending on the rotation of the fastening bolt, the area that contacts the third fixing part among the first area and the second area can be determined.

[0014] It may further include a clamp located at one end of the fastening bolt, with a portion located in the first through hole and another portion located on the cross-section facing the plug, so as to prevent the fastening bolt from detaching from the first through hole.

[0015] The above valve can be installed in the safety injection system of a small modular reactor (SMR).

[0016] According to the present invention, a valve including a hinge anti-detachment unit is provided.

[0017] FIG. 1 shows a valve including a hinge anti-detachment unit according to an embodiment of the present invention, and

[0018] FIG. 2 is an enlarged cross-sectional view of A in FIG. 1, and

[0019] FIGS. 3 to 6 illustrate the operation of a detachment prevention unit in a valve including a hinge detachment prevention unit according to an embodiment of the present invention.

[0020] The present invention will be described in more detail below with reference to the drawings.

[0021] The attached drawings are merely examples illustrated to further explain the technical concept of the present invention, and therefore the concept of the present invention is not limited to the attached drawings. Additionally, the sizes and spacing, etc., in the attached drawings may be exaggerated from reality to explain the relationships between the components.

[0022] Referring to FIGS. 1 and 2, a valve (hereinafter referred to as the “valve”) including a hinge anti-detachment unit according to an embodiment of the present invention will be described.

[0023] FIG. 1 shows a valve including a hinge anti-detachment unit according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing an enlarged view of A in FIG. 1.

[0024] The valve (10) includes a hinge pin (100), a backflow prevention disc (200), a plug (300), a washer (400), and a detachment prevention unit (500).

[0025] The hinge pin (100) is formed within the valve body (11) and is located in a receiving space (U) that is extended in a first direction and is extended in a first direction along the axis of rotation.

[0026] Here, the receiving space (U) includes a first space portion (U1) with an expanded cross-sectional area and a second space portion (U2) extending on both sides of the first space portion (U1).

[0027] In the first space portion (U1), a hinge pin (100), a backflow prevention disc (200) and a washer (400) described later are located, and a part of the second space portion (U2) is in communication with the outside, and a plug (300) is located in the part that is in communication with the outside.

[0028] The hinge pin (100) includes a first hinge portion (110) located in a first space portion (U1), a second hinge portion (120) located in a second space portion (U2), and a third hinge portion (130).

[0029] The backflow prevention disc (200) is rotatably coupled to the hinge pin (100) and is located in a flow space (F) that is in communication with the receiving space (U).

[0030] The backflow prevention disc (200) is coupled to the first hinge portion (110) between the washer (400) described later.

[0031] The plug (300) is located at one end of the hinge pin (100), with part located in the receiving space (U) and other part located outside the receiving space (U), thereby preventing the hinge pin (100) from coming off.

[0032] A washer (400) is located on the outer surface of the hinge pin (100), and a coupling groove (410) is formed toward the hinge pin (100). The washer (400) is located in the first space portion (U1) and is coupled to both ends of the first hinge portion (110).

[0033] The washer (400) is restricted from moving in the first direction by the valve body (11) surrounding the second space portion (U2).

[0034] The anti-detachment unit (500) secures the hinge pin (100) and the washer (400) so that the hinge pin (100) does not detach from the receiving space (U) through coupling with the coupling groove (410), and includes a first through hole (510), a second through hole (520), a fixing pin (530), a fastening bolt (540), a guide part (550), and an elastic member (560).

[0035] The first through hole (510) is formed in the hinge pin (100) and is formed extending in the first direction from the cross section facing the plug (300).

[0036] The second through hole (520) is formed from the outer surface of the hinge pin (100) toward the center of the hinge pin (100) and is connected to the first through hole (510) through the coupling groove (410).

[0037] The fixing pin (530) is inserted into the second through hole (520) and is connected to the coupling groove (410) and the first through hole (510) depending on the position in the second through hole (520).

[0038] The fixing pin (530) includes a first fixing part (531), a second fixing part (532), and a third fixing part (533).

[0039] The first fixing part (531) is a portion of the fixing pin (530) located in the coupling groove (410) at the fixed position, the second fixing part (532) is connected to one end of the first fixing part (531) and is a portion with an expanded cross-sectional area, and the third fixing part (533) is connected to the second fixing part (532) and is a portion that moves the second through hole (520) up and down according to the rotation of the fastening bolt (540).

[0040] The fastening bolt (540) determines the position between a fixed position where a part of the fixing pin (530) is located in the coupling groove (410) and a release position where the fixing pin (530) is spaced apart from the coupling groove (410).

[0041] The fastening bolt (540) includes a positioning part (541) and a clamp (542).

[0042] The position determining part (541) contacts the third fixed part (533) to determine the fixed position and the release position.

[0043] The position determining part (541) includes a first area (T1) that raises the fixing pin (530) to a fixed position by contacting the third fixing part (533), and a second area (T2) that lowers the fixing pin (530) to a release position by receiving a part of the third fixing part (533) into the internal area of ​​the fastening bolt (540).

[0044] Depending on the rotation of the fastening bolt (540), the area in contact with the third fixed part (533) among the first area (T1) and the second area (T2) is determined.

[0045] The clamp (542) is located at one end of the fastening bolt (540), with part located in the first through hole (510) and the other part located on the cross-section facing the plug (300), so as not to detach the fastening bolt (540) from the first through hole (510).

[0046] The guide portion (550) is located above the second through hole (520) and reduces the cross-sectional area of ​​the second through hole (520) to guide the movement of the fixing pin (530) when the position of the fixing pin (530) changes.

[0047] The elastic member (560) is located between the guide portion (550) and the second fixing portion (532) and presses the fixing pin (530) toward the first through hole (510). In one embodiment of the present invention, the elastic member (560) may include a spring, but is not limited thereto.

[0048] With reference to FIGS. 3 to 6, the operation of the anti-detachment unit within a valve including a hinge anti-detachment unit according to an embodiment of the present invention will be described.

[0049] FIGS. 3 to 6 illustrate the operation of a detachment prevention unit in a valve including a hinge detachment prevention unit according to an embodiment of the present invention. Specifically, FIGS. 3 and 4 show a release position in which the fixing pin (530) is spaced apart from the coupling groove (410) before the fastening bolt (540) in the detachment prevention unit (500) is operated, and FIGS. 5 and 6 show a fixed position in which a part of the fixing pin (530) is positioned in the coupling groove (410) by the rotation of the fastening bolt (540) in the detachment prevention unit (500).

[0050] Referring to FIGS. 3 and 4, before the fastening bolt (540) is operated, the third fixing portion (533) of the fixing pin (530) is located in the second region (T2), so the fixing pin (530) is located in a release position that is spaced apart from the coupling groove (410). That is, before the fastening bolt (540) is operated, a part of the third fixing portion (533) of the fixing pin (530) is located in a release position that is received into the internal region of the fastening bolt (540).

[0051] At this time, the first fixing part (531) of the fixing pin (530) is spaced apart from the coupling groove (410) and is in contact with the guide part (550), and the elastic member (560) presses the second fixing part (532) so that the third fixing part (533) is received into the internal area of ​​the fastening bolt (540).

[0052] Subsequently, as shown in FIGS. 5 and 6, the third fixing part (533) of the fixing pin (530), which was located in the inner region of the fastening bolt (540) by the first region (T1) of the positioning part (541), is detached and rises. Due to this rise, the first fixing part (531) moves in the direction where the coupling groove (410) is located, and a part of the fixing pin (530) is fitted into the coupling groove (410).

[0053] At this time, the guide part (550) guides the movement of the fixing pin (530) so that the fixing pin (530) is coupled to the coupling groove (410) along the second through hole (520) with a reduced cross-sectional area, and the elastic member (560) is compressed between the second fixing part (532) of the fixing pin (530) and the guide part (550).

[0054] As described above, by rotating the fastening bolt (540), a part of the fixing pin (530) is positioned in the fixed position of the coupling groove (410), thereby the hinge pin (100) is fixed within the receiving space (U) by the washer (400). In addition, even if the plug (300) is displaced from the receiving space (U), the hinge pin (100) is not displaced from the receiving space (U) due to being fixed with the washer (400) located at both ends of the first space portion (U1).

[0055] In the present invention, even if the plug in a valve having a hinge structure becomes detached for any reason, the hinge pin does not become detached through the hinge detachment prevention unit, thereby preventing accidents in which a large amount of internal fluid leaks from the valve. In particular, in the case of nuclear power, it is possible to prevent serious accidents such as a Loss of Coolant Accident (LOCA) in advance. Furthermore, the present invention can be applied to valves installed in the safety injection system of Small Modular Reactors (SMRs), which include existing large nuclear power plants, where the size of piping and equipment is smaller and there are many confined spaces.

[0056] Although the present invention has been described with reference to an embodiment illustrated in the accompanying drawings, this is merely illustrative, and those skilled in the art will understand that various modifications can be made to the present invention. Accordingly, the technical scope of protection of the present invention should be determined by the appended claims.

Claims

1. In a valve including a hinge anti-detachment unit, A hinge pin formed within the valve body and located in a receiving space extending in a first direction; A backflow prevention disc rotatably coupled to the above hinge pin and located in a flow space communicating with the above receiving space; A plug located at one end of the hinge pin, with a portion located in the receiving space and another portion located outside the receiving space, which prevents the hinge pin from detaching; A washer located on the outer surface of the hinge pin and having a coupling groove formed toward the hinge pin; and A valve comprising: a detachment prevention unit that fixes the washer and the hinge pin so that the hinge pin is not detached from the receiving space through coupling with the coupling groove.

2. In Paragraph 1, The above accommodation space is, A first space portion with an expanded cross-sectional area; and It includes a second space portion extending on both sides of the first space portion; and The above washers are located at both ends of the first space portion, and The above washer is a valve whose movement in the first direction is restricted by the valve body surrounding the second space portion.

3. In Paragraph 2, The above hinge pin includes a first hinge portion located in the first space portion, a second hinge portion located in the second space portion, and a third hinge portion. The washer is located in the first space portion and is coupled to both ends of the first hinge portion, The above backflow prevention disc is a valve coupled to the first hinge portion between the washers.

4. In Paragraph 1, The above anti-detachment unit is, A first through hole formed in the hinge pin and extending in the first direction from the cross-section facing the plug; A second through hole formed from the outer surface of the hinge pin toward the center of the hinge pin and communicating with the coupling groove and the first through hole; A fixing pin that moves between a release position in which the entire pin is located within the second through hole and a fixing position in which a portion is located within the coupling groove; and A valve comprising a fastening bolt located in the first through hole, wherein the fixing pin determines the position.

5. In Paragraph 4, The above anti-detachment unit is, A guide part located above the second through hole and reducing the cross-sectional area of ​​the second through hole to guide the movement of the fixing pin when the position of the fixing pin changes; and A valve further comprising an elastic member that presses the above-mentioned fixing pin toward the above-mentioned first through hole.

6. In Paragraph 5, The above elastic member is a valve including a spring.

7. In Paragraph 3, The above fixing pin is, A first fixed portion in which at least a portion is located in a coupling groove at the above fixed position; A second fixing part connected to one end of the first fixing part and having an expanded cross-sectional area; and It includes a third fixing part connected to the above-mentioned second fixing part and moving the second through hole up and down according to the rotation of the fastening bolt; The above elastic member is a valve located between the guide part and the second fixed part.

8. In Paragraph 7, The above fastening bolt is, It includes a positioning part that contacts the third fixed part to determine a fixed position and a release position, and The above positioning unit is, It includes a first region that contacts the third fixing part to raise the fixing pin to a fixed position, and a second region that accommodates at least a portion of the third fixing part into the internal region of the fastening bolt to lower the fixing pin to a release position. A valve in which the area in contact with the third fixed part among the first area and the second area is determined according to the rotation of the above-mentioned fastening bolt.

9. In Paragraph 8, A valve further comprising a clamp located at one end of the fastening bolt, with a portion located in the first through hole and another portion located on the cross-section facing the plug, so as to prevent the fastening bolt from detaching from the first through hole.

10. In Paragraph 1, The above valve is a valve installed in the safety injection system of a Small Modular Reactor (SMR).

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