Low temperature resistant valve

Abstract

The utility model discloses a kind of low temperature resistant valves, including valve body, valve core, pivot, limiting piece and elastic piece, the valve core and the limiting piece are oppositely arranged in the two sides of the valve body, the valve body is equipped with multiple interfaces, the valve core is equipped with the communication groove for intercommunication different interfaces on the side close to the valve body, the valve body is equipped with first positioning part, the valve core is equipped with the second positioning part matched with the first positioning part, the pivot is arranged in the valve body and the valve core and is connected with the limiting piece, the elastic piece is arranged between the pivot and the valve core to provide elastic force to make the valve core and the valve body adhere closely. The utility model has the advantages of simple structure, good reliability, which is conducive to ensuring the sealing property under low temperature working condition.

Claims

1. A cryogenic valve, characterized in that: The valve body includes a valve body (1), a valve core (2), a rotating shaft (3), a limiting member (4), and an elastic member (5). The valve core (2) and the limiting member (4) are arranged opposite to each other on both sides of the valve body (1). The valve body (1) is provided with multiple interfaces (11). The valve core (2) is provided with a connecting groove (21) for connecting different interfaces (11) on the side close to the valve body (1). The valve body (1) is provided with a first positioning part (12). The valve core (2) is provided with a second positioning part (23) that cooperates with the first positioning part (12). The rotating shaft (3) passes through the valve body (1) and the valve core (2) and is connected to the limiting member (4). The elastic member (5) is provided between the rotating shaft (3) and the valve core (2) to provide elastic force so that the valve core (2) and the valve body (1) are tightly attached.

2. The cryogenic-resistant valve of claim 1, wherein: The connecting groove (21) is provided with sealing protrusions (22) around its perimeter. The sealing protrusions (22) fit against the valve body (1). A gasket (6) is provided between the limiting member (4) and the valve body (1) so that there is a gap between the limiting member (4) and the valve body (1).

3. The cryogenic-resistant valve of claim 2, wherein: Both the valve core (2) and the gasket (6) are made of polytetrafluoroethylene.

4. The cryogenic-resistant valve of claim 1, wherein: The valve core (2) is provided with an anti-rotation groove (25) on the side away from the valve body (1), and the rotating shaft (3) is provided with an anti-rotation flange (37), which is embedded in the anti-rotation groove (25).

5. The cryogenic-resistant valve of claim 4, wherein: The anti-rotation groove (25) is a trapezoidal groove, and the two bottom edges of the trapezoidal groove are correspondingly set with the connecting groove (21).

6. The cryogenic-resistant valve of claim 1, wherein: The end of the rotating shaft (3) away from the limiting member (4) is provided with an indicator (35) corresponding to the communicating groove (21).

7. The cryogenic-resistant valve of any one of claims 1 to 6, wherein: One end of the rotating shaft (3) is provided with a threaded hole (31), the bottom of the threaded hole (31) is a planar structure, and the limiting member (4) is provided with a limiting screw (41), the shank of the limiting screw (41) abuts against the bottom of the threaded hole (31).

8. The cryogenic-resistant valve of any one of claims 1 to 6, wherein: The rotating shaft (3) is provided with a cover plate (32), and the edge of the cover plate (32) is provided with a bent part (33), and the valve core (2) is located inside the bent part (33).

9. The cryogenic-resistant valve of any one of claims 1 to 6, wherein: The rotating shaft (3) has a handle (36) at the end away from the limiting member (4).

10. The cryogenic valve according to any one of claims 1 to 6, characterized in that: The rotating shaft (3) is provided with a first limiting part (34), and the inner wall of the second positioning part (23) is provided with a second limiting part (24). The elastic member (5) is sleeved on the outer periphery of the rotating shaft (3). One end of the elastic member (5) abuts against the first limiting part (34), and the other end abuts against the second limiting part (24).

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