Auxiliary tool for assembling U-shaped sealing ring

Abstract

The utility model relates to the technical field of ball valve assembly, in particular to an auxiliary tool for assembling a U-shaped sealing ring, which comprises a fixed supporting seat, a circular supporting plate and a plurality of telescopic connecting pieces, the circular supporting plate comprises a plurality of arc supporting plate bodies, the circular supporting plate is arranged on the outer side of the fixed supporting seat through the telescopic connecting pieces, and the telescopic connecting pieces are arranged on the circular supporting plate bodies. And one end of one telescopic connecting piece is detachably connected with the fixed supporting seat, and the other end of the telescopic connecting piece is detachably connected with one arc supporting plate body. According to the auxiliary tool, the inner side of the second U-shaped sealing ring can be protected, the possibility that the U-shaped sealing ring is damaged in the assembling process is effectively reduced, and the using effect of valve sealing is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valve assembly, in particular to an auxiliary tool for assembling a U-shaped sealing ring. Background Art

[0002] Ultra-low temperature ball valve is a key equipment specially designed for LNG storage and transportation. Because the temperature of the medium it transports is between -101℃ and -196℃, this type of valve cannot use O-rings as seals, and can only use U-rings as seals.

[0003] Currently, if Figure 1 、 Figure 2 As shown, a commonly used cryogenic ball valve includes a valve body (4), a valve seat assembly (5), four open rings (6), a piston ring (7), a first U-shaped sealing ring (8) and a second U-shaped sealing ring (9). The first U-shaped sealing ring (8) and the second U-shaped sealing ring (9) are arranged back to back to form a sealing pair to ensure the seal between the valve body (4) and the valve seat assembly (5). When assembling, as shown in FIG. Figure 3 、 Figure 4 and Figure 5 As shown, first, the first U-shaped sealing ring (8) and the second U-shaped sealing ring (9) are installed back to back into the valve body (4), then the four-open ring (6) is embedded, and finally the assembly formed by the valve seat assembly (5) and the piston ring (7) is installed into the valve body (4). When the assembly formed by the valve seat assembly (5) and the piston ring (7) is installed into the valve body (4), the inner side of the first U-shaped sealing ring (8) contacts the outer surface of the piston ring (7), generating friction. The friction causes the first U-shaped sealing ring (8) to squeeze the second U-shaped sealing ring (9). Since the outer side of the second U-shaped sealing ring (9) contacts the valve body and the inner side has no support protection, the squeezing force is released toward the inner side, which will cause damage to the sealing surface of the second U-shaped sealing ring (9). Continuing to assemble will damage the second U-shaped sealing ring (9), affecting the sealing of the valve. Utility Model Content

[0004] The technical problem solved by the utility model is to provide an auxiliary tool for assembling a U-shaped sealing ring, wherein the auxiliary tool can reduce the possibility of damage to the U-shaped sealing ring during the assembly process.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an auxiliary tooling for assembling a U-shaped sealing ring, including a fixed support seat, a circular support plate and multiple telescopic connecting pieces, the circular support plate includes multiple arc support plate bodies, the circular support plate is arranged on the outside of the fixed support seat through the telescopic connecting piece, and one end of a telescopic connecting piece is detachably connected to the fixed support seat, and the other end of a telescopic connecting piece is detachably connected to a circular arc support plate body.

[0006] Furthermore, the fixed support seat is in the shape of a hollow ring.

[0007] Furthermore, the telescopic connector includes a hexagonal nut and a hexagonal head bolt. The hexagonal nut is arranged on the circumferential surface of the fixed support seat, and one end of the hexagonal head bolt is matched and connected with the hexagonal nut.

[0008] Furthermore, the hexagonal nut includes a nut body and a hollow guide sleeve. The guide sleeve is arranged on the circumferential surface of the fixed support seat, the nut body is arranged on the guide sleeve, and one end of the hexagonal head bolt can pass through the nut body and enter the guide sleeve.

[0009] Furthermore, the telescopic connecting members are evenly distributed around the fixed support seat.

[0010] Furthermore, the outer surface of the arc support plate is an arc surface, the inner surface of the arc support plate is a plane, the outer surfaces of all the arc support plates can form a circle, or the outer surfaces of all the arc support plates and the gaps between adjacent ones can form a circle;

[0011] A connecting groove is provided on the inner surface of the arc supporting plate body, and the head of the hexagonal head bolt is detachably clamped in the connecting groove.

[0012] Furthermore, the connecting groove is cylindrical in shape.

[0013] Furthermore, the width of the circular support plate is equal to the sum of the widths of the two U-shaped sealing rings.

[0014] The beneficial effects of the present invention are as follows: the auxiliary tooling for assembling the U-shaped sealing ring of the present invention comprises a fixed support seat, a circular support plate and multiple telescopic connecting pieces. The assembly process of the ultra-low temperature ball valve using the auxiliary tooling of the present invention is as follows: first, the first U-shaped sealing ring and the second U-shaped sealing ring are installed back to back into the valve body, and then the auxiliary tooling is placed into the inner sides of the first U-shaped sealing ring and the second U-shaped sealing ring from the valve flow channel, and the telescopic connecting piece is extended to make the outer surface of the circular support plate abut against the inner sides of the first U-shaped sealing ring and the second U-shaped sealing ring; then the four-open ring is inlaid, and the assembly formed by the valve seat assembly and the piston ring is installed into the valve body, and the valve seat assembly and the piston ring are installed through During the installation process, the auxiliary tooling will be attached first, and then the installation will continue so that the piston ring will push the auxiliary tooling back in the opposite direction, so that the first U-shaped sealing ring will gradually be exposed. When the first U-shaped sealing ring contacts the outside of the piston ring, friction will be generated. This friction will cause the first U-shaped sealing ring to squeeze the second U-shaped sealing ring. Since the outside of the second U-shaped sealing ring contacts the valve body and the inside is supported and protected by the auxiliary tooling, the squeezing force will not deform the second U-shaped sealing ring, thus protecting the sealing surface of the second U-shaped sealing ring and ensuring the sealing of the valve. Finally, the piston ring will continue to be installed until the auxiliary tooling is completely separated from the second U-shaped sealing ring, and after the inside of the second U-shaped sealing ring is completely in contact with the piston ring, the auxiliary tooling can be removed. It can be seen that the auxiliary tooling of the utility model can protect the inside of the second U-shaped sealing ring, effectively reduce the possibility of damage to the U-shaped sealing ring during the assembly process, and ensure the sealing effect of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of a cryogenic ball valve;

[0016] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 This is the assembly diagram of the ultra-low temperature ball valve in the existing technology Figure 1 ;

[0018] Figure 4 yes Figure 3 Enlarged view of point B in the middle;

[0019] Figure 5 This is the assembly diagram of the ultra-low temperature ball valve in the existing technology Figure 2 ;

[0020] Figure 6 It is a structural diagram of auxiliary tooling;

[0021] Figure 7 It is a schematic diagram of the exploded structure of the auxiliary tooling;

[0022] Figure 8 Schematic diagram of using auxiliary tooling to assemble ultra-low temperature ball valve Figure 1 ;

[0023] Figure 9 Schematic diagram of using auxiliary tooling to assemble ultra-low temperature ball valve Figure 2 ;

[0024] Marked as: fixed support seat 1, circular support plate 2, arc support plate body 21, connecting groove 211, telescopic connecting piece 3, hexagonal nut 31, nut body 311, guide sleeve 312, hexagonal head bolt 32, valve body 4, valve seat assembly 5, four open rings 6, piston ring 7, first U-shaped sealing ring 8, second U-shaped sealing ring 9. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 6 、 Figure 7 As shown, the auxiliary tooling for assembling the U-shaped sealing ring of the utility model includes a fixed support seat 1, a circular support plate 2 and multiple telescopic connecting members 3. The circular support plate 2 includes multiple arc support plate bodies 21. The circular support plate 2 is arranged on the outside of the fixed support seat 1 through the telescopic connecting member 3, and one end of the telescopic connecting member 3 is detachably connected to the fixed support seat 1, and the other end of the telescopic connecting member 3 is detachably connected to a circular arc support plate body 21.

[0027] The assembly process of the ultra-low temperature ball valve using the auxiliary tooling of the utility model is as follows: Figure 8 As shown, first, the first U-shaped sealing ring 8 and the second U-shaped sealing ring 9 are installed back to back into the valve body 4, and then the auxiliary tooling is placed from the valve flow channel into the inner side of the first U-shaped sealing ring 8 and the second U-shaped sealing ring 9, and the telescopic connector 3 is extended so that the outer surface of the circular support plate 2 is against the inner side of the first U-shaped sealing ring 8 and the second U-shaped sealing ring 9; then the four-open ring 6 is inlaid, and the assembly formed by the valve seat assembly 5 and the piston ring 7 is installed into the valve body 4, as shown. Figure 9 As shown, during the installation of the valve seat assembly 5 and the piston ring 7, the auxiliary tooling will be affixed first, and the installation will continue so that the piston ring 7 will push the auxiliary tooling back in the opposite direction, so that the first U-shaped sealing ring 8 is gradually exposed. When the first U-shaped sealing ring 8 contacts the outer side of the piston ring 7, friction is generated. The friction force causes the first U-shaped sealing ring 8 to squeeze the second U-shaped sealing ring 9. Since the outer side of the second U-shaped sealing ring 9 contacts the valve body and the inner side is supported and protected by the auxiliary tooling, the extrusion force will not deform the second U-shaped sealing ring 9, thereby protecting the sealing surface of the second U-shaped sealing ring 9 and ensuring the sealing of the valve. Finally, continue to install (push) the piston ring 7 until the auxiliary tooling is completely separated from the second U-shaped sealing ring 9, and the inner side of the second U-shaped sealing ring 9 is completely in contact with the piston ring 7, and then remove the auxiliary tooling.

[0028] Specifically, in order to facilitate operators to use auxiliary tooling, Figure 6 As shown, the shape of the fixed support seat 1 is preferably a hollow ring.

[0029] The telescopic connector 3 mainly plays two roles, one is the connecting role, and the other is that its length can be adjusted, so that the arc support plate 21 can be against the inside of the second U-shaped sealing ring 9, and can also be removed from the second U-shaped sealing ring 9. In order to facilitate the use of the telescopic connector 3 and improve the use effect of the telescopic connector 3, a preferred structure of the telescopic connector 3 of the utility model is: the telescopic connector 3 includes a hexagonal nut 31 and a hexagonal head bolt 32, and the hexagonal nut 31 is arranged on the circumferential surface of the fixed support seat 1, and one end of the hexagonal head bolt 32 is matched and connected with the hexagonal nut 31. The length of the telescopic connector 3 is adjusted by screwing the hexagonal head bolt 32 into the hexagonal nut 31 at different lengths. In order to further improve the length adjustment range of the telescopic connector 3 and improve the use range of the auxiliary tooling, for example Figure 6 、 Figure 7 As shown, the hexagonal nut 31 includes a nut body 311 and a hollow guide sleeve 312. The guide sleeve 312 is disposed on the circumferential surface of the fixed support base 1, and the nut body 311 is disposed on the guide sleeve 312. One end of the hexagonal head bolt 32 can pass through the nut body 311 and enter the guide sleeve 312. The guide sleeve 312 is equivalent to increasing the length of the nut body 311. The length of the hexagonal head bolt 32 screwed into the hexagonal nut 31 is increased, thereby improving the adjustment of the length of the telescopic connector 3. The guide sleeve 312 also serves as a guide to prevent the hexagonal head bolt 32 from deflecting during the screwing process.

[0030] The inner sides of the first U-shaped sealing ring 8 and the second U-shaped sealing ring 9 are circular. To ensure the supporting and protective effect of the arc support plate 21, the outer surface of the arc support plate 21 is an arc surface, and the inner surface of the arc support plate 21 is a plane. The outer surfaces of all the arc support plates 21 can form a circle, or the outer surfaces of all the arc support plates 21 and the gaps between adjacent ones can form a circle. The inner surface of the arc support plate 21 is provided with a connecting groove 211, and the head of the hexagonal head bolt 32 is removably engaged in the connecting groove 211. The number of arc support plates 21 is determined by the inner diameter of the first U-shaped sealing ring 8 and the second U-shaped sealing ring 9. In order to ensure that the arc support plate 21 has a better supporting effect, the number of arc support plates 21 is preferably 6 or 8. The number of telescopic connectors 3 is the same as the number of arc support plates 21, and the telescopic connectors 3 are evenly distributed around the fixed support base 1.

[0031] The head of the hexagonal bolt 32 is hexagonal. In order to facilitate the insertion and removal of the head of the hexagonal bolt 32 into the connecting groove 211, the connecting groove 211 is cylindrical.

[0032] In order to improve the supporting and protecting effect of the arc support plate 21 , the width of the circular support plate 2 is equal to the sum of the widths of the two U-shaped sealing rings, that is, the sum of the widths of the first U-shaped sealing ring 8 and the second U-shaped sealing ring 9 .

Claims

1. Auxiliary tooling for assembling U-shaped sealing ring, characterized by: The invention comprises a fixed support seat (1), a circular support plate (2) and a plurality of telescopic connecting members (3); the circular support plate (2) comprises a plurality of arc support plate bodies (21); the circular support plate (2) is arranged on the outside of the fixed support seat (1) via the telescopic connecting member (3); one end of the telescopic connecting member (3) is detachably connected to the fixed support seat (1); and the other end of the telescopic connecting member (3) is detachably connected to a circular arc support plate body (21).

2. The auxiliary tooling for assembling a U-shaped sealing ring according to claim 1, characterized in that: The shape of the fixed support seat (1) is a hollow circular ring.

3. The auxiliary tool for assembling a U-shaped sealing ring according to claim 1, characterized in that: The telescopic connecting member (3) comprises a hexagonal nut (31) and a hexagonal bolt (32). The hexagonal nut (31) is arranged on the circumferential surface of the fixed support seat (1), and one end of the hexagonal bolt (32) is matched and connected with the hexagonal nut (31).

4. The auxiliary tool for assembling a U-shaped sealing ring according to claim 3, characterized in that: The hexagonal nut (31) comprises a nut body (311) and a hollow guide sleeve (312). The guide sleeve (312) is arranged on the circumferential surface of the fixed support seat (1). The nut body (311) is arranged on the guide sleeve (312). One end of the hexagonal head bolt (32) can pass through the nut body (311) and enter the guide sleeve (312).

5. The auxiliary tool for assembling a U-shaped sealing ring according to claim 3, characterized in that: The telescopic connecting parts (3) are evenly distributed in the circumferential direction of the fixed support seat (1).

6. The auxiliary tool for assembling a U-shaped sealing ring according to any one of claims 3 to 5, characterized in that: The outer surface of the arc support plate (21) is an arc surface, the inner surface of the arc support plate (21) is a plane, and the outer surfaces of all the arc support plates (21) can form a circle, or the outer surfaces of all the arc support plates (21) and the gaps between adjacent ones can form a circle; A connecting groove (211) is provided on the inner surface of the arc support plate body (21), and the head of the hexagonal head bolt (32) is detachably clamped in the connecting groove (211).

7. The auxiliary tool for assembling a U-shaped sealing ring according to claim 6, characterized in that: The connecting groove (211) is cylindrical in shape.

8. The auxiliary tool for assembling a U-shaped sealing ring according to claim 1, characterized in that: The width of the circular support plate (2) is equal to the sum of the widths of the two U-shaped sealing rings.

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