Sodium valve sealing assembly

Abstract

The utility model provides a sodium valve sealing assembly which is characterized in that a straight cylinder is arranged in a valve body, one end of the straight cylinder extends to a sodium medium inlet and is arranged with a gap between the straight cylinder and the sodium medium inlet, the straight cylinder and the sodium medium inlet are provided with a sealing assembly, the sealing assembly is movably connected with the sodium medium inlet, and when a gap exists between the sealing assembly and the sodium medium inlet, the sealing assembly is sealed. The sodium medium inlet, the valve cavity and the sodium medium outlet are communicated; a sealing ring is arranged at the other end of the straight cylinder, an adjusting part is arranged on the inner side of the sealing ring and used for adjusting the sealing assembly to abut against or deviate from the sodium medium inlet, and the adjusting part is connected with the sealing assembly and slidably connected with the inner side of the sealing ring. When sodium medium fluid is introduced through the sodium medium inlet, the gap between the sealing assembly and the sodium medium inlet is opened, the fluid flows out through the sodium medium outlet after flowing through the valve cavity, and the adjusting piece on the inner side of the sealing ring is used for adjusting the sealing assembly to abut against or deviate from the sodium medium inlet, so that adjustment of the sealing assembly is achieved, and stability in the valve cavity is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of reactor engineering, in particular to a sodium valve sealing component. Background Art

[0002] Sodium valves are valves used to control the flow of sodium fluids and are commonly found in high-temperature, high-pressure nuclear reactor systems such as sodium-cooled reactors. Since sodium is highly corrosive and chemically active at high temperatures, sodium valves must have excellent corrosion resistance and sealing capabilities. A Chinese patent (publication number CN209495016U) discloses a large-caliber sodium valve dynamic seal assembly, which achieves online monitoring of the dynamic seal of the sodium valve by forming a frozen seal chamber between the valve cover and the valve stem, filling the upper part with argon gas, and arranging a gas pressure sensor on the upper part of the valve cover. If the gas pressure measured by the gas sensor on the upper part of the valve cover is stable, the dynamic seal is effective. If the gas pressure measured by the gas sensor changes rapidly, it indicates that the dynamic seal has failed and relevant remedial measures need to be taken. However, it cannot maintain the stability of the sodium valve seal. Therefore, the utility model proposes a sodium valve sealing assembly to improve the above-mentioned problem. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the sodium valve sealing assembly in the prior art cannot maintain a stable sodium valve seal, thereby providing a sodium valve sealing assembly.

[0004] In order to solve the above problems, the utility model provides a sodium valve sealing assembly, which includes: a valve body having a valve cavity, a valve cover provided on the top of the valve body, a sodium medium inlet provided on the bottom of the valve body, a sodium medium outlet extending from the side wall of the valve body, and the sodium medium inlet and the sodium medium outlet communicating with the valve cavity;

[0005] A straight cylinder is provided in the valve body, the straight cylinder is connected to the inner wall of the valve cavity, one end of the straight cylinder extends to the sodium medium inlet and a gap is set between the sodium medium inlet, the straight cylinder and the sodium medium inlet are provided with a sealing assembly, the sealing assembly is movably connected to the sodium medium inlet, and when a gap exists between the sealing assembly and the sodium medium inlet, the sodium medium inlet, the valve cavity and the sodium medium outlet are connected;

[0006] A sealing ring is provided at the other end of the straight cylinder, and an adjusting member is provided inside the sealing ring. The adjusting member is used to adjust the sealing assembly to abut against or away from the sodium medium inlet. The adjusting member is connected to the sealing assembly and is slidably connected to the inner side of the sealing ring.

[0007] Preferably, a transition groove is provided on the inner wall of the valve cavity between the straight cylinder and the sodium medium inlet, the transition groove is connected to the sodium medium outlet, and one end of the straight cylinder close to the sodium medium inlet extends above the transition groove.

[0008] Preferably, the sealing assembly comprises: a sliding plate and a sealing plate, wherein a fixing rod is connected between the sliding plate and the sealing plate, and two ends of the fixing rod are respectively connected to the sliding plate and the sealing plate;

[0009] The sodium medium inlet is provided with a first arcuate surface near the transition groove, and the first arcuate surface extends from the sodium medium inlet into the transition groove. The sealing plate is provided with a second arcuate surface adapted to the first arcuate surface near the first arcuate surface.

[0010] Preferably, the outer side of the sealing ring is connected to the inner wall of the valve cavity, a sliding ring is provided on the side of the sealing ring close to the sodium medium inlet, the outer side of the sliding ring is slidingly connected to the inner side of the straight cylinder, and the inner side of the sliding ring is slidingly connected to the regulating member.

[0011] Preferably, the adjusting member includes: a sliding cylinder, one end of the sliding cylinder is closed and the other end is open, the closed end of the sliding cylinder abuts the sealing ring, the outer wall of the sliding cylinder and the inner side of the sliding ring are slidably connected, a positioning rod is provided in the sliding cylinder, one end of the positioning rod is connected to the center of the sliding cylinder, and the other end of the positioning rod extends toward the sliding plate, and a positioning groove is provided in the center of the sliding plate and the fixed rod, and the positioning groove extends from the positioning plate to the fixed rod, and when the sliding cylinder abuts the sliding ring, the positioning rod extends into the positioning groove and leaves a gap with the bottom of the positioning groove.

[0012] Preferably, a spring is sleeved on the positioning rod, one end of the spring abuts against the sliding cylinder, and the other end abuts against the sliding plate.

[0013] Preferably, a screw is provided at one end of the sliding cylinder away from the sodium medium inlet, one end of the screw is connected to the center of the sliding cylinder, the other end of the screw is screwed to the screw hole at the center of the valve cover and passes through the valve cover, and the other end of the screw is provided with an operating handle.

[0014] Preferably, the sealing ring is evenly provided with at least three groups of pressure sensors with the center of the valve cavity as the center, and the measuring ends of the pressure sensors respectively pass through the sliding ring and the sealing ring and extend into the straight cylinder.

[0015] Preferably, the sodium medium outlet is provided with a bell mouth close to the straight cylinder, and the smaller end of the bell mouth in the cross section is close to the straight cylinder.

[0016] The sodium valve sealing assembly provided by the utility model has the following beneficial effects:

[0017] 1. When a sodium medium fluid is introduced through the sodium medium inlet, the gap between the sealing assembly and the sodium medium inlet is opened, and the fluid flows through the valve cavity and then out through the sodium medium outlet. The adjusting member is connected to the sealing assembly and is slidably connected to the inner side of the sealing ring. The adjusting member on the inner side of the sealing ring is used to adjust the sealing assembly to abut or move away from the sodium medium inlet, thereby achieving adjustment to ensure stability in the valve cavity.

[0018] 2. In the present invention, when the sliding cylinder slides inside the sliding ring, the positioning rod connected to the sliding cylinder moves toward the bottom of the positioning groove until it abuts the bottom of the positioning groove, driving the second arcuate surface of the sealing ring to abut the first arcuate surface, thereby achieving a seal between the two and blocking the flow of fluid. When the sliding cylinder abuts the sliding ring, the positioning rod extends into the positioning groove and leaves a gap with the bottom of the positioning groove. The distance of this gap represents the dynamic adjustment range of the adjusting member.

[0019] 3. The utility model also adjusts the sliding cylinder through a screw rod, so that its dynamic adjustment range can be changed. By operating the handle to screw it to the valve cover, the sliding cylinder is adjusted to slide inside the sliding ring. When the pressure in the valve cavity is too high, its dynamic range can be relatively reduced or the sealing plate can be made to abut against the sodium medium inlet, and the sealing ring provides a limit for its sliding cylinder. When the pressure in the valve cavity becomes high, the sliding cylinder slides in the sliding ring, and the sealing ring provides support for it. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the internal structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the final assembly of the utility model.

[0022] The reference numerals indicate:

[0023] 1. Valve body; 2. Valve chamber; 3. Valve cover; 4. Sodium medium inlet; 5. Sodium medium outlet; 6. Straight cylinder; 7. Sealing ring; 8. Transition groove; 9. Sliding plate; 10. Sealing plate; 11. Fixed rod; 12. First arc-shaped surface; 14. Sliding ring; 15. Sliding cylinder; 16. Positioning rod; 17. Positioning groove; 18. Spring; 19. Screw; 20. Operating handle; 21. Pressure sensor; 22. Bell mouth. DETAILED DESCRIPTION

[0024] like Figure 1-2As shown, the utility model provides a sodium valve sealing assembly, which includes: a valve body 1 having a valve cavity 2, a valve cover 3 is provided on the top of the valve body 1; a sodium medium inlet 4 is provided at the bottom of the valve body 1, a sodium medium outlet 5 is extended from the side wall of the valve body 1, and the sodium medium inlet 4 and the sodium medium outlet 5 are connected to the valve cavity 2; a straight cylinder 6 is provided in the valve body 1, the straight cylinder 6 is connected to the inner wall of the valve cavity 2, one end of the straight cylinder 6 extends to the sodium medium inlet 4 and is provided with a gap with the sodium medium inlet 4, the straight cylinder 6 and the sodium medium inlet 4 are provided with a sealing assembly, the sealing assembly and the sodium medium inlet 4 are movably connected, when there is a gap between the sealing assembly and the sodium medium inlet 4, the sodium medium inlet, the valve cavity 2 and the sodium medium outlet 5 are connected; the other end of the straight cylinder 6 is provided with a sealing ring 7, an adjusting member is provided on the inner side of the sealing ring 7, the adjusting member is used to adjust the sealing assembly to abut or deviate from the sodium medium inlet 4, the adjusting member is connected to the sealing assembly and is slidably connected to the inner side of the sealing ring 7. As shown Figure 1-2 As shown, a sodium valve sealing assembly includes: a valve body 1 having a valve cavity 2, wherein the valve cover 3 and the valve body 1 can be connected by bolts, the sodium medium inlet 4 at the bottom of the valve body 1 is externally connected to the sodium medium pipeline, and the sodium medium outlet 5 on the side wall of the valve body 1 is externally connected to the pipeline, so that the sodium medium enters the valve cavity 2 through the sodium medium inlet 4 and can be discharged through the sodium medium outlet 5; wherein the connection between the straight cylinder 6 and the inner wall of the valve cavity 2 can be welded, and a corresponding sealing ring is provided at the interface between the straight cylinder 6 and the valve cavity 2. When the sodium medium fluid is introduced into the sodium medium inlet 4, the gap between the sealing assembly and the sodium medium inlet 4 is opened, and the fluid flows through the valve cavity 2 and flows out through the sodium medium outlet 5; and the sealing ring 7 at the other end of the straight cylinder 6 can be bolted or welded to the straight cylinder 6. The adjusting member is connected to the sealing assembly and is slidably connected to the inner side of the sealing ring 7. The adjusting member inside the sealing ring 7 is used to adjust the sealing assembly to abut or deviate from the sodium medium inlet 4 to achieve its adjustment to ensure stability in the valve cavity 2.

[0025] In some embodiments, a transition groove 8 is provided on the inner wall of the valve cavity 2 between the straight cylinder 6 and the sodium medium inlet 4. The transition groove 8 is connected to the sodium medium outlet 5. One end of the straight cylinder 6 close to the sodium medium inlet 4 extends above the transition groove 8. Figure 1-2 As shown, the transition groove 8 is opened along the inner wall of the valve cavity 2, and is used to initially buffer the fluid entering the valve cavity 2 through the sodium medium inlet 4, and then flows to the valve cavity 2 and is finally discharged from the sodium medium outlet 5. Among them, the straight cylinder 6 extends above the transition groove 8, so that the transition groove 8 and the valve cavity 2 are initially separated, forming a semi-enclosed space to provide a better buffering effect.

[0026] In some embodiments, the sealing assembly includes: a sliding plate 9 and a sealing plate 10, wherein a fixing rod 11 is connected between the sliding plate 9 and the sealing plate 10, and the two ends of the fixing rod 11 are respectively connected to the sliding plate 9 and the sealing plate 10; the sodium medium inlet 4 is provided with a first curved surface 12 near the transition groove 8, and the first curved surface 12 extends from the sodium medium inlet 4 into the transition groove 8, and the sealing plate 10 is provided with a second curved surface adapted to the first curved surface 12 near the first curved surface 12. Figure 1-2 As shown, the two ends of the fixed rod 11 are connected to the sealing plate 10 and the sliding plate 9, so that when the sliding plate 9 slides on the inner wall of the straight cylinder 6, the sealing plate 10 will move synchronously, and the first curved surface 12 at the sodium medium inlet 4 and the second curved surface adapted thereto act on the sealing plate 10 and the sodium medium inlet. A rubber film is provided on the side where the first curved surface 12 and the second curved surface abut against each other, so that a better sealing effect can be maintained between the two after the abutment.

[0027] In some embodiments, the outer side of the sealing ring 7 is connected to the inner wall of the valve chamber 2, and a sliding ring 14 is provided on the side of the sealing ring 7 close to the sodium medium inlet 4. The outer side of the sliding ring 14 is slidably connected to the inner side of the straight cylinder 6, and the inner side of the sliding ring 14 is slidably connected to the regulating member. Figure 1-2 As shown, the outer side of the sealing ring 7 is connected to the inner wall of the valve chamber 2, and the two may be in abutment with each other. The sealing ring 7 and the straight cylinder 6 are connected by bolts, and corresponding sealing rings are provided. The sliding ring 14 and the straight cylinder 6 are connected by bolts, and the inner side of the sliding ring 14 is slidably connected to the adjusting member, so that the sealing plate 10 and the sodium medium inlet 4 are easily adjusted by the adjusting member to determine whether they are in abutment with each other.

[0028] In some embodiments, the adjusting member includes: a sliding cylinder 15, one end of the sliding cylinder 15 is closed and the other end is open, the closed end of the sliding cylinder 15 abuts the sealing ring 7, the outer wall of the sliding cylinder 15 is slidably connected to the inner side of the sliding ring 14, a positioning rod 16 is provided in the sliding cylinder 15, one end of the positioning rod 16 is connected to the center of the sliding cylinder 15, and the other end of the positioning rod 16 extends to the sliding plate 9, and a positioning groove 17 is provided in the center of the sliding plate 9 and the fixed rod 11, and the positioning groove 17 extends from the positioning plate to the fixed rod 11, and when the sliding cylinder 15 abuts the sliding ring 14, the positioning rod 16 extends into the positioning groove 17 and leaves a gap with the bottom of the positioning groove 17. Figure 1-2As shown, the opening of the sliding cylinder 15 faces the sodium medium inlet 4. When the sliding cylinder 15 slides inside the sliding ring 14, the positioning rod 16 connected to the sliding cylinder 15 moves toward the bottom of the positioning groove 17 until it abuts the bottom of the positioning groove 17 and drives the second arc surface of the sealing ring 7 to abut the first arc surface 12, thereby achieving a seal between the two and blocking the flow of the fluid; and when the sliding cylinder 15 abuts the sliding ring 14, the positioning rod 16 extends into the positioning groove 17 and leaves a gap with the bottom of the positioning groove 17. The distance of the gap is the dynamic adjustment range of the adjusting member.

[0029] In some embodiments, a spring 18 is sleeved on the positioning rod 16, one end of the spring 18 abuts against the sliding cylinder 15, and the other end abuts against the sliding plate 9. Figure 1-2 As shown, the spring 18 can play a buffering role during the adjustment process, and can also provide buffering after the direction of force is changed.

[0030] In some embodiments, a screw 19 is provided at one end of the sliding cylinder 15 away from the sodium medium inlet 4, one end of the screw 19 is connected to the center of the sliding cylinder 15, the other end of the screw 19 is screwed to the screw hole at the center of the valve cover 3 and passes through the valve cover 3, and the other end of the screw 19 is provided with an operating handle 20. Figure 1-2 As shown, the sliding cylinder 15 is adjusted by the screw 19 so that its dynamic adjustment range can be changed. By operating the handle 20, it is screwed to the valve cover 3, and the sliding cylinder 15 is adjusted to slide inside the sliding ring 14. When the pressure in the valve chamber 2 is too high, its dynamic range can be relatively reduced or the sealing plate 10 can be made to abut against the sodium medium inlet 4, and the sealing ring 7 provides a limit for its sliding cylinder 15. When the pressure in the valve chamber 2 becomes large, the sliding cylinder 15 slides in the sliding ring 14, and the sealing ring 7 provides support for it.

[0031] In some embodiments, the sealing ring 7 is evenly provided with at least three groups of pressure sensors 21 with the center of the valve cavity 2 as the center of the circle, and the measuring ends of the pressure sensors 21 respectively pass through the sliding ring 14 and the sealing ring 7 and extend into the straight cylinder 6. Figure 1-2 As shown, the pressure sensor 21 is commercially available. The measuring end of the pressure sensor 21 passes through the sliding ring 14 and the sealing ring 7 and extends into the straight cylinder 6 to measure the pressure in its valve cavity 2, so as to facilitate the adjustment of the position of the sliding cylinder 15 in the sliding ring 14 according to the pressure and needs.

[0032] In some embodiments, the sodium medium outlet 5 is provided with a bell mouth 22 near the straight tube 6, and the smaller end of the bell mouth 22 is close to the straight tube 6. Figure 1-2 As shown, the bell mouth 22 of the sodium medium outlet 5 can play a buffering role on the fluid flowing from the valve chamber 2 when flowing toward the outside.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. Such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A sodium valve sealing assembly comprising: A valve body having a valve cavity, with a valve cover provided on the top of the valve body, characterized in that: The bottom of the valve body is provided with a sodium medium inlet, and the side wall of the valve body extends to form a sodium medium outlet, and the sodium medium inlet and the sodium medium outlet are connected to the valve cavity; A straight cylinder is provided in the valve body, the straight cylinder is connected to the inner wall of the valve cavity, one end of the straight cylinder extends to the sodium medium inlet and a gap is set between the sodium medium inlet, the straight cylinder and the sodium medium inlet are provided with a sealing assembly, the sealing assembly is movably connected to the sodium medium inlet, and when a gap exists between the sealing assembly and the sodium medium inlet, the sodium medium inlet, the valve cavity and the sodium medium outlet are connected; A sealing ring is provided at the other end of the straight cylinder, and an adjusting member is provided inside the sealing ring. The adjusting member is used to adjust the sealing assembly to abut against or away from the sodium medium inlet. The adjusting member is connected to the sealing assembly and is slidably connected to the inner side of the sealing ring.

2. The sodium valve sealing assembly according to claim 1, characterized in that: A transition groove is provided on the inner wall of the valve cavity between the straight cylinder and the sodium medium inlet. The transition groove is connected to the sodium medium outlet. One end of the straight cylinder close to the sodium medium inlet extends above the transition groove.

3. The sodium valve sealing assembly according to claim 2, characterized in that: The sealing assembly comprises: a sliding plate and a sealing plate, wherein a fixing rod is connected between the sliding plate and the sealing plate, and two ends of the fixing rod are respectively connected to the sliding plate and the sealing plate; The sodium medium inlet is provided with a first arcuate surface near the transition groove, and the first arcuate surface extends from the sodium medium inlet into the transition groove. The sealing plate is provided with a second arcuate surface adapted to the first arcuate surface near the first arcuate surface.

4. The sodium valve sealing assembly according to claim 3, characterized in that: The outer side of the sealing ring is connected to the inner wall of the valve cavity. A sliding ring is provided on the side of the sealing ring close to the sodium medium inlet. The outer side of the sliding ring is slidably connected to the inner side of the straight cylinder, and the inner side of the sliding ring is slidably connected to the regulating member.

5. The sodium valve sealing assembly according to claim 4, characterized in that: The adjusting part includes: a sliding cylinder, one end of the sliding cylinder is closed and the other end is open, the closed end of the sliding cylinder abuts the sealing ring, the outer wall of the sliding cylinder and the inner side of the sliding ring are slidably connected, a positioning rod is provided in the sliding cylinder, one end of the positioning rod is connected to the center of the sliding cylinder, and the other end of the positioning rod extends to the sliding plate, and a positioning groove is provided in the sliding plate and the center of the fixed rod, and the positioning groove extends from the positioning rod to the fixed rod, and when the sliding cylinder abuts the sliding ring, the positioning rod extends into the positioning groove and leaves a gap with the bottom of the positioning groove.

6. The sodium valve sealing assembly according to claim 5, characterized in that: A spring is sleeved on the positioning rod, one end of the spring abuts against the sliding cylinder, and the other end abuts against the sliding plate.

7. The sodium valve sealing assembly according to claim 5, characterized in that: A screw is provided at one end of the sliding cylinder away from the sodium medium inlet, one end of the screw is connected to the center of the sliding cylinder, the other end of the screw is screwed to the screw hole at the center of the valve cover and passes through the valve cover, and the other end of the screw is provided with an operating handle.

8. The sodium valve sealing assembly according to claim 4, characterized in that: The sealing ring is evenly provided with at least three groups of pressure sensors with the center of the valve cavity as the center of the circle, and the measuring ends of the pressure sensors respectively pass through the sliding ring and the sealing ring and extend into the straight cylinder.

9. The sodium valve sealing assembly according to claim 1, characterized in that: The sodium medium outlet is provided with a bell mouth close to the straight cylinder, and the smaller end of the bell mouth in the cross section is close to the straight cylinder.

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