一种高温用金属密封自密封调节型旋塞阀
By designing a self-sealing mechanism, elastic elements and multiple rubber sealing rings are used to compensate for the thermal expansion differences of the plug valve at high temperatures, solving the problems of increased sealing gap and sealing failure in high-temperature plug valves, and achieving the effects of strong sealing performance and ease of use at high temperatures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BAODING VALVE IND CO LTD
- Filing Date
- 2025-09-24
- Publication Date
- 2026-07-17
AI Technical Summary
Existing high-temperature plug valves suffer from increased sealing gaps due to inconsistent thermal expansion between the valve body and the plug at high temperatures. Traditional bolt-pre-tightened seals are prone to loosening and loss of sealing power, requiring frequent maintenance.
The self-sealing mechanism includes a first telescopic spring, a first rubber sealing ring, a pressure ring, and a metal bellows. By elastically pressing down on the conical plug, it adaptively compensates for the sealing gap due to high-temperature thermal deformation. Combined with multiple rubber sealing rings and a limiting structure, it ensures a good sealing effect.
It effectively compensates for sealing gaps, reduces the frequency of seal failure at high temperatures, improves sealing performance and service life, and reduces maintenance frequency.
Smart Images
Figure CN224515996U_ABST
Abstract
Claims
1. A high temperature metal seal self-sealing regulating type cock valve comprising a valve body (1), a valve cover (2), a gland (3), a conical cock (4) and a self-sealing mechanism (7), characterized in that: The valve body (1) is provided with a conical inner cavity (11), and the two sides of the conical inner cavity (11) are connected to flow channels (12) for medium flow. The valve cover (2) is fitted onto the top of the valve body (1), and the pressure cap (3) is fixed to the top of the valve cover (2) for axially limiting the conical plug (4); The conical plug (4) is adapted to be installed in the conical inner cavity (11), and the conical plug (4) has a through hole (41) that matches the flow channel (12) along the radial direction. The self-sealing mechanism (7) elastically presses down the conical plug (4) to adaptively compensate for the sealing gap as the valve body (1) and the conical plug (4) deform under high temperature conditions. The top of the conical plug (4) extends out of the valve cover (2) and is connected to an operating component to control the rotation of the conical plug (4).
2. A high temperature metal seal self-sealing regulating stopcock valve according to claim 1, characterized in that: The self-sealing mechanism (7) includes a first telescopic spring (71), a first rubber sealing ring (72), and a pressure ring (73). The top surface of the conical plug (4) has a plane (43), the first rubber sealing ring (72) is attached to the plane (43), and the pressure ring (73) is located on top of the first rubber sealing ring (72); The valve cover (2) has a stepped hole (21) inside, and the first telescopic spring (71) is located between the inner top surface of the stepped hole (21) and the pressure ring (73).
3. A high temperature metal seal self-sealing regulating stopcock valve according to claim 2, characterized in that: The self-sealing mechanism (7) also includes a metal bellows (74); The top of the conical plug (4) is fixed with a valve stem (42) extending from the valve cover (2) and the pressure cap (3). The connection between the conical plug (4) and the valve stem (42) has a second conical surface (44). The bottom of the pressure cap (3) has a first conical surface (31). The metal bellows (74) is located between the second conical surface (44) and the first conical surface (31).
4. A high temperature metal seal self-sealing regulating-type cock valve according to claim 1, characterized in that: It also includes a threaded rod (15), a locking nut (16), and a second telescopic spring (17); At least two of the threaded rods (15) are evenly spaced along the circumferential direction and fixed to the top surface of the valve cover (2), and the threaded rods (15) penetrate the pressure cap (3). The locking nut (16) is provided at the protruding end of the threaded rod (15) by means of thread engagement; The second telescopic spring (17) is sleeved on the threaded rod (15) and located between the pressure cap (3) and the locking nut (16).
5. A high temperature metal seal self-sealing regulating-type cock valve according to claim 1, characterized in that: It also includes a second rubber sealing ring (8); On the mating surfaces of the conical inner cavity (11) and the conical plug (4), corresponding first slots A (13) and B (45) are respectively provided. The first slots A (13) and B (45) are located above the flow channel (12), and the second rubber sealing ring (8) is located inside the first slots A (13) and B (45).
6. A high temperature metal seal self-sealing regulating-type cock valve according to claim 1, characterized in that: It also includes a third rubber seal (9); A second groove A (14) and a second groove B (46) are respectively provided on the mating surface of the conical inner cavity (11) and the conical plug (4). The second groove A (14) and the second groove B (46) are located below the flow channel (12), and the third rubber sealing ring (9) is located inside the second groove A (14) and the second groove B (46).
7. A high temperature metal seal self-sealing regulating stopcock valve as defined in claim 3, wherein: The operating component is a handle (5); The handle (5) is fixed to the top of the valve stem (42).
8. A high temperature metal seal self-sealing regulating stopcock valve according to claim 7, characterized in that: It also includes a limiting post (6); The two limiting posts (6) are fixed at intervals to the top surface of the pressure cap (3). When the handle (5) is rotated, the side surface of the handle (5) can abut against the limiting posts (6) to limit the rotation angle of the conical plug (4) to 0°-90°.