A high-temperature sealing valve for magnesium alloy liquid

Abstract

The present application relates to the technical field of valve, especially to a high-temperature sealing valve for magnesium alloy liquid, which comprises a valve body, two no. 1 valve cores arranged vertically in axial direction are rotatably arranged on the valve body, valve core flanges are sleeved on the outer sides of the two no. 1 valve cores, flexible graphite sealing rings with sealing function are arranged between the valve core flanges and the no. 1 valve cores, connecting flanges are fixedly installed on the liquid inlet and the liquid outlet of the valve body through screws, and the connecting flanges and the valve body are also sealed through flexible graphite sealing rings. The present application is mainly applied to adjust the flow size of high-temperature liquid flowing in the valve body, and more importantly, the synchronous opening and closing of multiple valve cores can be realized through single control mode, effectively avoiding the problem of internal leakage of the valve body after the valve core is used for intercepting flow. In the present embodiment, flexible graphite sealing rings are arranged at the positions of the valve body and the positions where leakage may occur to keep the sealing of the connection between the valve body and each component, which can effectively prevent external leakage of the valve body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve, in particular to a high-temperature sealing valve for magnesium alloy liquid. BACKGROUND

[0002] In the fluid conveying system, the valve is an indispensable control component, which mainly has the functions of adjusting, guiding, preventing backflow, cutting off, and distributing. The valve is widely used in industrial and civil fields. The high-temperature valve is a commonly used type of valve, which has the following specific performance: good quenching performance, can be deeply quenched; good welding performance; good impact absorption performance, it is difficult to be damaged by violence; less tendency to temper brittleness, etc. There are relatively many types of high-temperature valves, and the more common ones are high-temperature butterfly valves, high-temperature ball valves, high-temperature filters, high-temperature gate valves, etc.

[0003] The most important thing of the current high-temperature valve is its sealing performance. When the high-temperature valve circulates high-temperature liquid inside, the internal liquid will cause the valve body to expand due to heat, and the valve body will shrink after the temperature decreases. The thermal expansion and contraction effect is easy to cause the valve body to leak. The valve used to transport magnesium alloy liquid in industry needs to withstand a high temperature of 700℃ or above. Such a large temperature difference is more likely to affect the service life of the valve.

[0004] The prior art proposes a technical solution for a high-temperature sealing valve. For example, the Chinese utility model patent application with publication number CN203463678U provides a technical solution for a sealing valve, which discloses a high-temperature and high-pressure bidirectional metal hard sealing butterfly valve, which includes a valve body, a butterfly plate, a valve body sealing ring, a limiting stopper, a butterfly plate sealing ring, an adjusting pressure plate, an upper valve shaft, a lower valve shaft, a high-temperature resistant shaft sleeve, and a positioning ring. The butterfly plate is installed in the valve body shaft neck through the upper valve shaft, the lower valve shaft, and the high-temperature resistant shaft sleeve. The valve body sealing ring is installed in the sliding groove of the valve body. The limiting stopper is welded on the valve body and limits the valve body sealing ring. The butterfly plate sealing ring is installed in the sliding groove of the butterfly plate. The adjusting pressure plate is installed on the butterfly plate through adjusting screws. The positioning ring is installed between the upper valve shaft, the lower valve shaft, and the valve body, and positions the butterfly plate. The valve body sealing ring is a sliding metal sealing ring, and the butterfly plate sealing ring is an O-shaped elastic metal stainless steel sealing ring. It has the advantages of meeting the bidirectional sealing requirements, reliable sealing performance, being suitable for high-temperature and high-pressure environments, and long service life.

[0005] However, the above patent application has the following disadvantages: 1. When the flow rate of the magnesium alloy liquid circulating in the valve body needs to be adjusted, only rotating the valve core to control the flow area will cause the valve core to be impacted by the large pressure of the liquid circulating in the valve body, which will increase the wear rate of the valve core. On the other hand, all the pressure will be resisted by the outer wall of the valve core, which will cause the valve core to easily form a gap with the valve body, resulting in internal or external leakage of the valve body.

[0006] 2. The above-mentioned patent application is difficult to ensure the blocking effect of the valve core by controlling the valve core alone, and when internal leakage occurs between the valve core and the valve body, the current environment cannot be ensured to continue to be used, and timely shutdown and replacement are required, which affects the production progress.

[0007] Therefore, in order to improve the control effect of the flow size of the magnesium alloy liquid in the valve body and prevent the magnesium alloy liquid from leaking externally and internally on the valve body, the application provides a high-temperature sealing valve for magnesium alloy liquid. SUMMARY

[0008] In view of the above problems, the application provides a high-temperature sealing valve for magnesium alloy liquid to solve the technical problems of internal leakage or external leakage when a high-temperature liquid flows in the valve body and excessive internal pressure causing the valve core to wear and reduce the service life in the related art. In order to achieve the above-mentioned purpose, the application provides the following technical scheme:

[0009] The first aspect of the embodiment of the application provides a high-temperature sealing valve for magnesium alloy liquid, comprising: a valve body, a valve core, a connecting flange, and a valve core flange, two valve cores arranged vertically in the axial direction are rotationally arranged on the valve body, and the two valve cores located on the outside of the valve body are each sleeved with a valve core flange, and a flexible graphite sealing ring with a sealing function is arranged between the valve core flange and the valve core; the valve core flange and the valve core are fixed by screws; the liquid inlet and the liquid outlet of the valve body are each fixedly installed with a connecting flange by screws, and the connecting flange and the valve body are also sealed by a flexible graphite sealing ring; a valve core adjusting nut is fixedly screwed on the outer wall of the valve core on the outside of the valve core flange, and a disc spring piece is arranged between the valve core adjusting nut and the valve core flange; and a valve core locking screw is arranged on the outer wall of the valve core adjusting nut to fix the valve core adjusting nut and the valve core.

[0010] An upper and lower symmetrical oval ring is sleeved on the outer wall of the valve core near the liquid inlet of the valve body, and two upper and lower symmetrical telescopic assemblies are arranged inside the valve body and located outside the oval ring; two flow limiting grooves are arranged symmetrically on the inner wall of the valve body near the channel, and a flow limiting plate is hingedly arranged in the flow limiting groove by a torsion spring; the flow limiting plate cooperates with the telescopic assembly; and a section of the flow limiting plate that cooperates with the telescopic assembly is an inclined structure.

[0011] When the valve core provided with the oval ring is in a fully open state, the telescopic assembly does not contact the flow limiting plate, and as the valve core rotates, the flow limiting plate is gradually pushed to rotate by the telescopic assembly until the flow limiting plate is perpendicular to the axis of the valve body in the process of gradually reducing the flow of the valve body to a fully closed state.

[0012] According to an advantageous embodiment, the telescopic assembly comprises a telescopic rod slidingly mounted inside the valve body, and a spring is sleeved on the outer wall of the telescopic rod near one end of the oval ring, one end of the spring is connected with the valve body, and the other end of the spring is connected with the protruding part of the outer wall of the telescopic rod.

[0013] According to an advantageous embodiment, the second valve core is rotatably arranged inside the valve body between the two first valve cores, a sealing block is arranged inside the second valve core for fixing the second valve core with the valve body, a flexible graphite sealing ring is arranged between the second valve core and the valve body, and the sealing block is fixed on the valve body by screws.

[0014] According to an advantageous embodiment, the lower end of the second valve core is provided with a square slot, the inside of the valve body is provided with a mounting slot, and a synchronous assembly is arranged inside the mounting slot, the synchronous assembly is inserted into the square slot, the inside of the first valve core near the liquid inlet of the valve body is provided with a control assembly achieving telescopic movement by pressing, and the control assembly and the synchronous assembly are also matched with each other.

[0015] According to an advantageous embodiment, the synchronous assembly comprises a cover plate, two rotating rods are rotatably arranged on the cover plate, the rotating rods are connected with the valve body through bearings, the upper end of each rotating rod is a square protruding structure, alloy chain wheels are arranged on the middle part of the rotating rods, the two alloy chain wheels are connected with each other through a chain, the upper end of one rotating rod is matched with the second valve core, and the upper end of the other rotating rod is matched with the control assembly.

[0016] According to an advantageous embodiment, the control assembly comprises a U-shaped pressing rod arranged inside the first valve core near the liquid outlet of the valve body, and the U-shaped pressing rod is connected with the first valve core through a spring; the lower end of the U-shaped pressing rod is connected with a buckle cover frame matched with the square protruding structure of the upper end of the rotating rod through screws.

[0017] Compared with the prior art, the high-temperature sealing valve for magnesium alloy liquid provided by the embodiment of the present application has the following beneficial effects:

[0018] 1. In the present application, the telescopic movement of the telescopic rod is controlled by the oval ring coaxially arranged with the first valve core to accurately adjust the opening angle of the flow limiting plate, so that the pressure of part of the liquid in the valve body is dispersed on the flow limiting plate, the pressure of the internal liquid on the first valve core is reduced, the service life of the first valve core is improved, and the flow limiting plate can perform flow interception operation on the liquid flowing in the valve body, effectively preventing the valve body from leaking.

[0019] 2. In this invention, flexible graphite sealing rings are provided at all possible leakage locations. The high temperature resistance and good ductility of the flexible graphite sealing rings can maintain the seal between the valve body and various components, effectively preventing external leakage caused by thermal expansion and contraction of the valve body.

[0020] 3. In this invention, by operating the first valve core simultaneously, the second valve core can simultaneously control and cut off the flow of the alloy liquid flowing inside the valve body, effectively preventing leakage inside the valve body; and the second valve core can avoid the problem of the alloy liquid inside the valve body being unable to be adjusted due to the first valve core failing to meet the usage requirements. Furthermore, the synchronization component and control component can control the second valve core based on the operation of the first valve core, and the structure is simple and highly practical. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the high-temperature sealing valve for magnesium alloy liquid according to the present invention.

[0022] Figure 2 This is the present invention. Figure 1 A sectional view.

[0023] Figure 3 For the present invention Figure 2 Enlarged view of a portion of point A in the middle.

[0024] Figure 4 For the present invention Figure 2 Enlarged view of section B in the middle.

[0025] Figure 5 This is a cross-sectional view of the elliptical ring of the present invention.

[0026] Figure 6 For the present invention Figure 2 A diagram showing the state of the flow restrictor opening due to liquid pressure after magnesium alloy liquid flows through it.

[0027] Figure reference numerals:

[0028] 1. Valve body; 2. No. 1 valve core; 3. Connecting flange; 4. Valve core flange; 5. Valve core adjusting nut; 6. Disc spring; 7. Elliptical ring; 8. Telescopic assembly; 9. Flow restrictor.

[0029] 10. Valve core No. 2; 11. Sealing block; 12. Synchronization assembly; 13. Control assembly; 81. Telescopic rod.

[0030] 121. Cover plate; 122. Rotating rod; 131. U-shaped pressing rod; 132. Cover bracket. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-6 This application will now be described in further detail.

[0032] The embodiment of the application discloses a high-temperature sealing valve for magnesium alloy liquid, and particularly, the high-temperature sealing valve for magnesium alloy liquid is mainly applied to flow size adjustment of high-temperature liquid flowing through the valve body 1, and more importantly, the valve can realize synchronous opening and closing of multiple valve cores through single control mode, so that the problem of internal leakage of the valve body 1 after flow interception by the valve core can be effectively avoided; and in the embodiment, flexible graphite sealing rings are arranged at positions where leakage may occur between the valve body 1 and various components to keep sealing of the valve body 1, so that external leakage of the valve body 1 can be effectively prevented.

[0033] Please refer to Figure 1 and Figure 2 , a high-temperature sealing valve for magnesium alloy liquid, comprising: a valve body 1, a valve core 2, a connecting flange 3, a valve core flange 4, the valve body 1 is rotatably provided with two valve cores 2 which are vertically arranged in the axial direction, and the two valve cores 2 located on the outer side of the valve body 1 are sleeved with the valve core flange 4, and the valve core flange 4 and the valve core 2 are provided with a flexible graphite sealing ring having a sealing function; the valve core flange 4 and the valve core 2 are fixed by screws; the liquid inlet and the liquid outlet of the valve body 1 are fixedly installed with the connecting flange 3 by screws, and the connecting flange 3 and the valve body 1 are also sealed by the flexible graphite sealing ring; the outer wall of the valve core 2 on the outer side of the valve core flange 4 is fixedly provided with a valve core adjusting nut 5, and the valve core adjusting nut 5 and the valve core flange 4 are provided with a disc spring piece 6, and the outer wall of the valve core adjusting nut 5 is provided with a valve core locking screw for fixing the valve core adjusting nut 5 and the valve core 2, wherein:

[0034] Please refer to Figure 3 and Figure 5 , the outer wall of the valve core 2 near the liquid inlet of the valve body 1 is sleeved with an upper and lower symmetrical oval ring 7, and the inside of the valve body 1 is provided with two upper and lower symmetrical telescopic assemblies 8 located outside the oval ring 7, the inner wall of the valve body 1 near the channel is provided with two upper and lower symmetrical flow limiting grooves, and the flow limiting plate 9 is hingedly arranged in the flow limiting groove by a torsion spring, and the flow limiting plate 9 cooperates with the telescopic assembly 8; and the section of the flow limiting plate 9 cooperating with the telescopic assembly 8 is an inclined structure.

[0035] Please refer to Figure 3 , when the valve core 2 provided with the oval ring 7 is in a completely open state, the telescopic assembly 8 does not contact the flow limiting plate 9, and during the process that the flow of the valve body 1 is gradually adjusted to be completely closed by rotating the valve core 2, the telescopic assembly 8 gradually pushes the flow limiting plate 9 to rotate until the flow limiting plate 9 is perpendicular to the axis of the valve body 1.

[0036] Specifically, when the valve body 1 is internally flowed with magnesium alloy liquid and temperature changes, the valve body 1 is prone to external leakage, but the flexible graphite sealing ring is arranged at all positions where leakage is possible to keep the valve body 1 and each component connected to be sealed, and the flexible graphite sealing ring is high-temperature resistant and has good ductility, so that the valve body 1 can be effectively prevented from external leakage.

[0037] When it is required to close the first valve core 2 to regulate or cut off the flow of the alloy liquid in the valve body 1, the flow of the alloy liquid in the valve body 1 is regulated by rotating the first valve core 2 near the liquid inlet of the valve body 1, and when the first valve core 2 is rotated, the oval ring 7 is synchronously rotated with the first valve core 2, so that the telescopic assembly 8 is driven to extend, and the telescopic assembly 8 gradually contacts the flow limiting plate 9 to drive the flow limiting plate 9 to rotate, so that the flow passage between the upper and lower flow limiting plates 9 is gradually reduced, and the cooperation of the first valve core 2 and the two flow limiting plates 9 can effectively control the flow of the internal liquid; and when the flow is completely cut off, the two flow limiting plates 9 can effectively prevent the valve body 1 from leaking, and in the process of rotating the first valve core 2, since the flow passage between the two flow limiting plates 9 is gradually reduced, part of the pressure of the alloy liquid in the valve body 1 is dispersed on the flow limiting plate 9, so that the impact force on the first valve core 2 is reduced, thereby effectively ensuring the service life of the first valve core 2.

[0038] Please refer to Figure 3 , the telescopic assembly 8 comprises a telescopic rod 81 slidably installed in the valve body 1, and a spring is arranged on one end of the telescopic rod 81 near the oval ring 7, one end of the spring is connected with the valve body 1, and the other end of the spring is connected with the protruding part of the outer wall of the telescopic rod 81, and the two ends of the telescopic rod 81 are movably provided with the ball respectively matched with the outer wall of the oval ring 7 and the outer wall of the flow limiting plate 9.

[0039] In the process of rotating the first valve core 2 near the liquid inlet of the valve body 1, the oval ring 7 is synchronously rotated with the first valve core 2 to drive the telescopic rod 81 to move, when the oval ring 7 top telescopic rod 81 is at the limit length, at this time, the two flow limiting plates 9 are in the closed state, so that the alloy liquid in the valve body 1 is cut off, with the continuous rotation of the first valve core 2, the telescopic rod 81 is reset by the spring, and gradually moves to the state that the telescopic rod 81 does not act on the flow limiting plate 9, at this time, the flow of the alloy liquid in the valve body 1 is not affected, and the alloy liquid in the valve body 1 can open the flow limiting plate 9 by the pressure of the flowing liquid (please refer to Figure 6 ), and when there is no alloy liquid flow, the flow limiting plate 9 is kept closed by the action of the torsional spring (please refer to Figure 2 ).

[0040] Example two:

[0041] On the basis of embodiment one, in order to improve the effect of intercepting and controlling the magnesium alloy liquid, prevent the magnesium alloy liquid in the valve body 1 from leaking after the closing of the first valve core 2, based on this, the second valve core 10 and the synchronous assembly 12 and the control assembly 13 for controlling the synchronous opening and closing of the second valve core 10 and the first valve core 2 are disclosed in this embodiment two, as follows:

[0042] Please refer to Figure 1 and Figure 2 , the second valve core 10 is rotatably arranged in the position between the two first valve cores 2 in the valve body 1, and the second valve core 10 is internally provided with a sealing block 11 for fixing it to the valve body 1, the second valve core 10 and the valve body 1 are sealed by a flexible graphite seal ring, and the sealing block 11 is fixed on the valve body 1 by screws.

[0043] Please refer to Figure 2 and Figure 4 , the lower end of the second valve core 10 is provided with a square slot, the inside of the valve body 1 is provided with a mounting slot, and the inside of the mounting slot is provided with a synchronous assembly 12, the synchronous assembly 12 is inserted and matched with the square slot, the inside of the first valve core 2 close to the liquid inlet of the valve body 1 is provided with a control assembly 13 which realizes the extension and retraction movement by pressing, and the control assembly 13 and the synchronous assembly 12 also cooperate with each other.

[0044] Please refer to Figure 4 , the synchronous assembly 12 includes a cover plate 121, two rotating rods 122 are rotatably arranged on the cover plate 121, the rotating rods 122 are also connected with the valve body 1 through bearings, the upper end of the rotating rod 122 is a square protruding structure, the middle part of the rotating rod 122 is provided with an alloy chain wheel, the two alloy chain wheels are connected by a chain, the upper end of one of the rotating rods 122 cooperates with the second valve core 10, and the upper end of the other rotating rod 122 cooperates with the control assembly 13.

[0045] Please refer to Figure 4 , the control assembly 13 includes a U-shaped pressing rod 131 arranged in the first valve core 2 close to the liquid outlet of the valve body 1, and the U-shaped pressing rod 131 is connected with the first valve core 2 through a spring; the lower end of the U-shaped pressing rod 131 is connected with a buckle cover frame 132 which cooperates with the square protruding structure at the upper end of the rotating rod 122 through screws.

[0046] Specifically, when the first valve core 2 cannot meet the use requirements and the alloy liquid flowing through the valve body 1 needs to be adjusted, the U-shaped pressing rod 131 can be pressed manually to drive the buckle cover frame 132 to be lowered and clamped with the square protruding structure on the upper end of the rotating rod 122 directly below, then the first valve core 2 is rotated, the first valve core 2 can preliminarily adjust the flow size of the valve body 1, and the alloy liquid flow size in the valve body 1 can be adjusted again by cooperating with the telescopic rod 81 and the flow limiting plate 9, and the flow size in the valve body 1 can be further adjusted by the first valve core 2 rotating the second valve core 10 through the chain in the process of rotating; at the same time, the alloy liquid flowing through the valve body 1 can be cut off by operating the second valve core 10, which can effectively prevent the valve body 1 from leaking; the second valve core 10 can ensure that the flow size in the valve body 1 is controlled when necessary, can avoid the problem that the alloy liquid cannot be adjusted due to the first valve core 2 cannot be used in time, and the synchronous assembly 12 and the control assembly 13 can control the second valve core 10 on the basis of operating the first valve core 2, and the structure is simple and practical.

[0047] The above description is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. A high temperature seal valve for magnesium alloy liquid comprising: The utility model discloses a valve body, a valve core, a connecting flange, a valve core flange, two axial vertical arrangement's valve core is rotationally arranged on the valve body, and two valve cores are located the outside of valve body and are all set with valve core flange, and the flexible graphite sealing ring with sealing effect is arranged between valve core flange and valve core, the valve core flange and valve core are fixed through screw, the liquid inlet and the liquid outlet of valve body are all fixedly installed with the connecting flange through screw, and the connecting flange and valve body are also sealed through the flexible graphite sealing ring, its characterized in that: the outer wall of valve core flange outside one valve core is fixed with valve core adjusting nut through screw, and disc spring piece is arranged between valve core adjusting nut and valve core flange, the outer wall of valve core adjusting nut is provided with valve core locking screw, and one valve core is fixed between valve core adjusting nut and valve core, wherein: The outer wall of one valve core close to the liquid inlet of valve body is sleeved with the upper and lower symmetrical oval ring, and two upper and lower symmetrical telescopic components are arranged in the inside of valve body and are located the outside of oval ring, the inner wall of the inside of valve body close to the channel is provided with two upper and lower symmetrical flow limiting grooves, and the flow limiting plate is hingedly arranged in the flow limiting groove through torsional spring, and the flow limiting plate is matched with telescopic component, and the section matched with telescopic component on the flow limiting plate is inclined structure, When the one valve core installed with oval ring is in the completely open state, the telescopic component and flow limiting plate are not contacted, along with the rotation of one valve core, the flow of valve body is gradually reduced to the completely closed process, and the telescopic component gradually pushes the flow limiting plate to rotate until the flow limiting plate is perpendicular to the axis of valve body, The alloy liquid in the inside can open the flow limiting plate through the pressure of flow liquid, and when there is no alloy liquid flow, the flow limiting plate is kept closed through the action of torsional spring.

2. A high temperature sealing valve for magnesium alloy liquid according to claim 1, characterized in that, The telescopic component includes telescopic rod slidingly installed in the inside of valve body, the outer wall of one end of telescopic rod close to oval ring is sleeved with spring, one end of spring is connected with valve body, the other end of spring is connected with the convex part of the outer wall of telescopic rod, and the both ends of telescopic rod are movably provided with ball respectively matched with the outer wall of oval ring and the outer wall of flow limiting plate.

3. A high temperature sealing valve for magnesium alloy liquid according to claim 1, characterized in that, The inside of valve body is rotationally arranged with two valve cores between two one valve cores, the inside of two valve cores is provided with sealing block fixed with valve body, the flexible graphite sealing ring is arranged between two valve cores and valve body, and the sealing block is fixed on valve body through screw.

4. A high temperature sealing valve for magnesium alloy liquid according to claim 3, characterized in that, The lower end of two valve cores is provided with square groove, the inside of valve body is provided with mounting groove, the inside of mounting groove is provided with synchronous component, the synchronous component is inserted with square groove, the inside of one valve core close to the liquid inlet of valve body is provided with control component realizing telescopic motion through pressing, and the control component and synchronous component also cooperate with each other.

5. A high temperature sealing valve for magnesium alloy liquid according to claim 4, characterized in that, The synchronous component includes cover plate, two rotating rods are rotationally arranged on the cover plate, the rotating rod and valve body are also connected through bearing, the upper end of rotating rod is square convex structure, alloy sprocket is arranged in the middle of rotating rod, and the upper end of one rotating rod is matched with two valve cores, and the upper end of another rotating rod is matched with control component.

6. A high temperature sealing valve for magnesium alloy liquid according to claim 5, characterized in that, The control assembly comprises a U-shaped pressing rod arranged in the interior of the first valve core close to the liquid outlet of the valve body, and the U-shaped pressing rod is connected with the first valve core through a spring; the lower end of the U-shaped pressing rod is connected with a buckle cover frame matched with the square protruding structure of the upper end of the rotating rod through a screw.

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