Ceramic hard sealing pipeline valve
By using ceramic materials to make the valve core and valve seat, and setting sealing edges and bearing edges therebetween, the problem of sealing failure of high-pressure pipeline valves is solved, and the hard sealing effect and low operating force are achieved in high-pressure environments.
Patent Information
- Application Number
- CN202422543806.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-10-21
AI Technical Summary
The rubber ring seal between the valve core and the valve seat of the existing high-pressure pipeline valve is prone to failure due to deformation of the high-pressure medium, resulting in failure of the seal.
The valve core and valve seat are made of hard materials such as ceramics, and a sealing edge is set between the valve core and the valve seat. The tight fit between the sealing edge and the bearing edge is used to achieve a hard seal, reducing the working area of the medium to avoid seal failure.
It realizes more reliable sealing under high-pressure environments, avoids deformation of seals caused by medium pressure, reduces valve core operating force, and improves sealing effect and reliability.
Smart Images
Figure CN223120661U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a high-pressure pipeline valve, and more specifically to a ceramic hard-sealed pipeline valve. Background Art
[0002] A high-pressure pipeline valve is a valve used to control high-pressure fluids and is widely used in industries such as chemical engineering, petroleum, natural gas, and electric power. The design of these valves is more complex than that of ordinary valves to adapt to the high-pressure environment. The high-pressure valve controls the flow of the fluid through a valve core, a valve body, and an actuator (such as a manual, electric, pneumatic, or hydraulic actuator). When the actuator operates, the valve core moves, changing the size of the valve passage, thereby regulating the flow rate of the fluid or completely blocking the fluid flow.
[0003] Currently, in the existing high-pressure pipeline valves in the prior art, rubber rings are mostly used for sealing between the valve core and the valve seat. Since the rubber ring has a certain elasticity, and during the application of the high-pressure pipeline valve, the media it contacts are mostly high-pressure media. Therefore, during use, the rubber ring is prone to deformation, and thus it is easy to occur the situation of seal failure. In this way, when closing the valve, there is a situation where the high-pressure pipeline valve leaks the medium. Summary of the Utility Model
[0004] Aiming at the deficiencies of the existing technology, the purpose of the present utility model is to provide a ceramic hard-sealed pipeline valve with a more reliable seal between the valve core and the valve seat.
[0005] To achieve the above purpose, the present utility model provides the following technical solution: A ceramic hard-sealed pipeline valve, including a valve body, a valve core, and a valve seat. A medium passage for high-pressure media to pass through is provided in the valve body. It is characterized in that: The valve seat is fixedly installed at one end of the medium passage, the valve core is slidably arranged in the medium passage, the outer side wall of the valve core is in sliding seal with the medium passage, the valve core is in a hollow cylindrical shape, and a passage for the medium to pass through is formed inside. Both the valve seat and the valve core are made of hard materials. A sealing edge is provided at one end of the valve core facing the valve seat. When the valve core slides towards the valve seat and the end is in contact with the valve seat, the sealing edge is in contact with the end face of the valve seat to block the passage inside the valve core, thereby blocking the medium passage.
[0006] As a further improvement of the present utility model, a receiving edge is provided at one end of the valve seat facing the valve core. When the end of the valve core is in contact with the valve seat, the sealing edge is in close fit with the receiving edge to form a sealing structure.
[0007] As a further improvement of the present utility model, the valve seat includes a fixing member, a mounting seat and a sealing disc. The fixing member is coaxially and sealingly fixedly installed at the end of the medium passage. A through hole is provided in the middle of the fixing member. Several mounting posts distributed in a circumferential manner are provided at one end of the fixing member facing the valve core. The mounting seat is fixedly installed on the mounting posts and is coaxial with the fixing member. A sealing ring groove is provided at one end of the mounting seat facing the valve core. A sealing ring is embedded in the sealing ring groove. The sealing disc is coaxially fixed on the mounting seat. The end face of the sealing disc abuts against the sealing ring, and a gap is left between the end face of the sealing disc and the mounting seat. The receiving edge is provided at one end of the sealing disc facing away from the mounting seat.
[0008] As a further improvement of the present utility model, a screw rod is coaxially sleeved on the valve core. A worm is rotatably provided in the valve body. A worm gear coaxial with the medium passage is rotatably provided in the valve body. The worm gear is of an annular structure, and threads are provided on both its outer ring wall and inner ring wall. The worm gear is sleeved on the screw rod, and the thread on the inner ring wall is engaged with the external thread of the screw rod. The worm is engaged with the thread on the outer ring wall of the worm gear to drive the worm gear to rotate through the worm, thereby driving the screw rod to slide back and forth along the medium passage.
[0009] As a further improvement of the present utility model, an indicating rod is fixed on the end face of the screw rod. An indicating hole with a size adapted to the indicating rod is provided in the valve body at a position relative to the indicating rod. One end of the indicating rod facing away from the worm gear passes through the indicating hole and extends to the outside.
[0010] As a further improvement of the present utility model, two antifriction pads are fixedly installed in the valve body. The two antifriction pads respectively abut against the two end faces of the worm gear to cooperate with each other to clamp the worm gear, so that the worm gear is rotatably provided in the valve body.
[0011] As a further improvement of the present utility model, an air cavity coaxial with the valve core is provided in the valve body. A piston is coaxially sleeved on the valve core. The piston is slidably provided in the air cavity, and the side wall of the piston is in sliding seal with the cavity wall of the air cavity. An air port connected to an external air source is provided on the outer side wall of the valve body. The air port is communicated with the air cavity.
[0012] As a further improvement of the present utility model, an indicating rod is fixed on the end face of the piston. An indicating hole with a size adapted to the indicating rod is provided in the valve body at a position relative to the indicating rod. One end of the indicating rod facing away from the piston passes through the indicating hole and extends to the outside.
[0013] The beneficial effects of the present utility model are as follows. By making the valve core and valve seat from hard materials, a basis for hard sealing can be effectively provided. And through the setting of the sealing edge on the valve core, hard sealing with the valve seat can be effectively achieved when the valve is closed. Compared with the rubber sealing method in the prior art, the problem of sealing failure caused by deformation of the sealing component due to high-pressure medium can be well avoided. At the same time, by using hard materials such as ceramics to make the valve core and valve seat, the allowable sealing specific pressure of ceramics is high, and a sealing band with only a small width (1 - 1.5 mm) can achieve the requirements of medium sealing and strength. The acting area of the medium is small, and the force required for the valve core to open and close in high-pressure medium application scenarios is also small. Brief Description of the Drawings
[0014] Figure 1 It is the overall structure diagram of an implementation manner of the ceramic hard-sealing pipeline valve of the present utility model;
[0015] Figure 2 It is the overall structure diagram of another implementation manner of the ceramic hard-sealing pipeline valve of the present utility model;
[0016] Figure 3 is Figure 1 or Figure 2 the overall structure diagram of the valve seat in Detailed Description of the Specific Embodiment
[0017] The following will further elaborate on the present utility model in combination with the embodiments given in the drawings.
[0018] Refer to Figure 1As shown in the figure, a ceramic hard-sealed pipeline valve in this embodiment includes a valve body 1, a valve core 2, and a valve seat 3. A medium passage 4 for high-pressure medium to pass through is provided in the valve body 1. It is characterized in that the valve seat 3 is fixedly installed at one end of the medium passage 4, the valve core 2 is slidably arranged in the medium passage 4, the outer side wall of the valve core 2 is in sliding seal with the medium passage 4, the valve core 2 is in a hollow cylindrical shape, and a passage for the medium to pass through is formed inside. Both the valve seat 3 and the valve core 2 are made of hard materials. One end of the valve core 2 facing the valve seat 3 is provided with a sealing edge. When the valve core 2 slides towards the valve seat 3 and the end abuts against the valve seat 3, the sealing edge abuts against the end face of the valve seat 3 to block the passage inside the valve core 2, thereby blocking the medium passage 4. During the use of the valve in this embodiment, only the valve body 1 needs to be connected to the high-pressure pipeline, and then the flow rate can be adjusted and blocked by translating the valve core 2. During the blocking process, the end of the valve core 2 abuts against the valve seat 3. In this way, by the action of the sealing edge, the hard-sealing effect can be achieved, and the medium passage 4 at the valve seat 3 and the passage inside the valve core 3 are blocked. In this way, compared with the soft-sealing method in the prior art, the problem that the seal fails due to the deformation of the seal caused by the medium pressure can be effectively avoided. In this embodiment, both the valve core 2 and the valve seat 3 are made of ceramics.
[0019] As a specific improvement embodiment, the end of the valve seat 3 facing the valve core 2 is provided with a receiving edge. When the end of the valve core 2 abuts against the valve seat 3, the sealing edge is in close fit with the receiving edge to form a sealing structure. Through the setting of the receiving edge, it can effectively combine with the sealing edge and better achieve sealing. And because both the valve core 2 and the valve seat 3 are made of ceramics, a sealing bandwidth of generally 1 - 1.5 mm between the sealing edge and the receiving edge can achieve sealing. Therefore, the force-bearing area of the medium acting on the valve core 2 is very small, and the force required to push the valve core 2 to act is also very small, making the valve core 2 easier to operate.
[0020] Refer to Figure 3As shown, as a specific embodiment of the improvement, the valve seat 3 includes a fixing member 31, a mounting seat 33, and a sealing disc 32. The fixing member 31 is coaxially and sealingly fixedly installed at the end of the medium passage 4. A through hole is formed in the middle of the fixing member 31. Several mounting posts 34 distributed in a circumferential manner are provided at one end of the fixing member 31 facing the valve core 2. The mounting seat 33 is fixedly installed on the mounting posts 34 and is coaxial with the fixing member 31. A sealing ring groove is formed at one end of the mounting seat 33 facing the valve core 2, and a sealing ring is embedded in the sealing ring groove. The sealing disc 32 is coaxially fixed on the mounting seat 33. The end face of the sealing disc 32 abuts against the sealing ring, and a gap is left between the end face of the sealing disc 32 and the mounting seat 33. The receiving edge is provided at one end of the sealing disc 32 facing away from the mounting seat 33. Through the setting of the above structure, on the one hand, the installation of the sealing disc 32 can be effectively realized. On the other hand, by setting the limit sleeve, a gap is left between the end face of the sealing disc 32 and the mounting seat 33, and an elastic sealing ring is filled in the gap. When the valve core 2 contacts the valve seat 3 during the closing process, the elastic sealing ring behind the valve seat 3 plays a buffering role to absorb the impact of the valve core 2 on the valve seat 3.
[0021] For the component for driving the valve core 2, the following two embodiments are provided in this embodiment:
[0022] Embodiment 1
[0023] Referring to Figure 1 As shown, a screw rod 5 is coaxially sleeved on the valve core 2. A worm 6 is rotatably provided in the valve body 1. A worm wheel 7 coaxial with the medium passage 4 is rotatably provided in the valve body 1. The worm wheel 7 is of an annular structure, and threads are provided on both its outer ring wall and inner ring wall. The worm wheel 7 is sleeved on the screw rod 5, and the thread on the inner ring wall is matched with the external thread of the screw rod 5. The worm 6 is matched with the thread on the outer ring wall of the worm wheel 7 to drive the worm wheel 7 to rotate through the worm 6, and then drive the screw rod 5 to slide back and forth along the medium passage 5. Through the setting of the above structure, the rotation of the worm wheel 7 driven by the worm 6 and then the sliding of the screw rod 5 can be effectively realized to drive the sliding of the valve core 2. This structure has a certain self-locking function on the one hand, and on the other hand, the thrust generated during the sliding of the valve core 2 can ensure sufficiency to avoid the situation that the valve core 2 does not slide in place.
[0024] As a further improvement of Embodiment 1, an indicating rod 8 is fixed on the end face of the worm wheel 7. An indicating hole adapted to the indicating rod 8 is formed in the valve body 1 at a position relative to the indicating rod 8. One end of the indicating rod 8 facing away from the worm wheel 7 passes through the indicating hole and extends to the outside. By the action of the indicating rod 8, on the one hand, the rotation of the screw rod 5 can be effectively restricted, and on the other hand, the current traveling position of the screw rod 5 can be indicated.
[0025] As a further improvement of Embodiment 1, two antifriction pads 13 are fixedly installed in the valve body 1. The two antifriction pads 13 respectively abut against the two end faces of the worm wheel 7 to cooperate with each other to clamp the worm wheel 7, so that the worm wheel 7 is rotatably arranged in the valve body 1. Through the arrangement of the antifriction pads, the rotational friction of the worm wheel 7 can be effectively reduced, and thus the worm wheel 7 can rotate better.
[0026] Embodiment 2
[0027] Referring to Figure 2 As shown, an air cavity 11 coaxial with the valve core 2 is formed in the valve body 1. A piston 9 is coaxially sleeved on the valve core 2. The piston 9 is slidably arranged in the air cavity 11, and the side wall of the piston 9 is in sliding seal with the cavity wall of the air cavity 11. An air port 12 connected to an external air source is formed in the outer side wall of the valve body 1. The air port 12 is communicated with the air cavity 11. Through the arrangement of the piston 9 and the air cavity 11, the valve core 2 can be effectively pushed by driving the piston 9 with the external air source. Its overall structure is simple and easy to implement.
[0028] As a further improvement of Embodiment 2, an indicating rod 8 is fixed to the end face of the piston 9. An indicating hole adapted to the indicating rod 8 in size is formed in the valve body 1 at a position relative to the indicating rod 8. One end of the indicating rod 8 facing away from the piston 9 extends to the outside after passing through the indicating hole. The function of the indicating rod 8 in Embodiment 2 is the same as that in Embodiment 1, so it will not be elaborated here.
[0029] In summary, for the ceramic hard-sealed pipeline valve of this embodiment, by using the hard-sealed structure of the valve core 2 and the valve seat 3, when the valve is applied to high-pressure media, the problem of seal failure caused by the deformation of the seal due to high-pressure media can be avoided.
[0030] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.
Claims
1. A ceramic hard-sealed pipeline valve, comprising a valve body (1), a valve core (2) and a valve seat (3), wherein a medium passage (4) for high-pressure medium to pass through is formed in the valve body (1), and it is characterized in that: The valve seat (3) is fixedly installed at one end of the medium passage (4), the valve core (2) is slidably arranged in the medium passage (4), the outer side wall of the valve core (2) is in sliding seal with the medium passage (4), the valve core (2) is in the shape of a hollow cylinder, and a passage for the medium to pass through is formed inside. Both the valve seat (3) and the valve core (2) are made of hard materials. One end of the valve core (2) facing the valve seat (3) is provided with a sealing edge. When the valve core (2) slides towards the valve seat (3) and the end abuts against the valve seat (3), the sealing edge abuts against the end face of the valve seat (3) to block the passage inside the valve core (2), thereby blocking the medium passage (4).
2. The ceramic hard-sealed pipeline valve according to claim 1, wherein: One end of the valve seat (3) facing the valve core (2) is provided with a receiving edge. When the end of the valve core (2) abuts against the valve seat (3), the sealing edge is closely attached to the receiving edge to form a sealing structure.
3. The ceramic hard-sealed pipeline valve according to claim 2, wherein: The valve seat (3) includes a fixing part (31), a mounting seat (33) and a sealing disc (32). The fixing part (31) is coaxially and hermetically fixedly installed at the end of the medium passage (4). A through hole is formed in the middle of the fixing part (31). Several mounting posts (34) distributed in a circular pattern are provided at one end of the fixing part (31) facing the valve core (2). The mounting seat (33) is fixedly installed on the mounting posts (34) and is coaxial with the fixing part (31). A sealing ring groove is formed at one end of the mounting seat (33) facing the valve core (2), and a sealing ring is embedded in the sealing ring groove. The sealing disc (32) is coaxially fixed on the mounting seat (33), the end face of the sealing disc (32) abuts against the sealing ring, and a gap is left between the end face of the sealing disc (32) and the mounting seat (33). The receiving edge is provided at one end of the sealing disc (32) facing away from the mounting seat (33).
4. The ceramic hard-sealed pipeline valve according to claim 1 or 2 or 3, characterized in that: A screw rod (5) is coaxially sleeved on the valve core (2). A worm (6) is rotatably provided in the valve body (1). A worm wheel (7) coaxial with the medium passage (4) is rotatably provided in the valve body (1). The worm wheel (7) is in the shape of a ring, and threads are provided on both its outer ring wall and inner ring wall. The worm wheel (7) is sleeved on the screw rod (5), and the thread on the inner ring wall is in threaded cooperation with the external thread of the screw rod (5). The worm (6) is in threaded cooperation with the thread on the outer ring wall of the worm wheel (7) to drive the worm wheel (7) to rotate through the worm (6), thereby driving the screw rod (5) to slide back and forth along the medium passage (4).
5. The ceramic hard-sealed pipeline valve according to claim 4, characterized in that: An indicating rod (8) is fixed on the end face of the screw rod (5). An indicating hole with a size adapted to the indicating rod (8) is formed in the valve body (1) at a position relative to the indicating rod (8). One end of the indicating rod (8) facing away from the worm wheel (7) passes through the indicating hole and extends to the outside.
6. The ceramic hard-sealed pipeline valve according to claim 5, characterized in that: Two antifriction pads (13) are fixedly installed in the valve body (1). The two antifriction pads (13) respectively abut against the two end faces of the worm wheel (7) to cooperate with each other to clamp the worm wheel (7) so that the worm wheel (7) is rotatably arranged in the valve body (1).
7. The ceramic hard-sealed pipeline valve according to claim 1 or 2 or 3, characterized in that: A gas chamber (11) coaxial with the valve core (2) is provided in the valve body (1). A piston (9) is coaxially sleeved on the valve core (2). The piston (9) is slidably arranged in the gas chamber (11), and the side wall of the piston (9) is in sliding seal with the wall of the gas chamber (11). An air port (12) connected to an external air source is provided on the outer side wall of the valve body (1), and the air port (12) communicates with the gas chamber (11).
8. The ceramic hard-sealed pipeline valve according to claim 7, characterized in that: An indicating rod (8) is fixed to the end face of the piston (9). An indicating hole adapted to the indicating rod (8) in size is provided in the valve body (1) at a position relative to the indicating rod (8). One end of the indicating rod (8) facing away from the piston (9) extends to the outside after passing through the indicating hole.