High-temperature and high-pressure top-mounted floating ball valve for fluidized bed hydrogenation device

Abstract

The high-temperature and high-pressure top-mounted floating ball valve comprises a valve body and a valve cover arranged at the far end of the valve body, an inlet and an outlet are formed in the two sides of the valve body, a valve cavity is formed in the valve body, a floating ball body is installed in the valve cavity, and a valve rod penetrates through the middle of the valve cover. The near end of the valve rod is connected with the floating ball, a front sealing assembly and a rear sealing assembly are arranged in the valve cavity and located on the two sides of the floating ball respectively, and through holes in the inlet, the front sealing assembly, the floating ball, the rear sealing assembly and the outlet are communicated to form a flow channel. The front sealing assembly comprises a front valve seat and a first disc spring arranged at the rear end of the front valve seat, the rear sealing assembly comprises a rear valve seat, an adjusting ring is arranged at the rear end of the rear valve seat, and the adjusting ring is connected with the rear valve seat through a first fixing piece, so that the rear valve seat is in sealing contact with a valve cavity, and the sealing performance of the ball valve is improved.

Description

Technical Field

[0001] The invention relates to the technical field of ball valves, and in particular to a high-temperature and high-pressure top-mounted floating ball valve for a fluidized bed hydrogenation device. Background Art

[0002] Valves are control components in fluid delivery systems, with functions such as shutoff, regulation, flow diversion, backflow prevention, pressure stabilization, flow diversion or overflow pressure relief. Valves used in fluid control systems come in a wide variety of varieties and specifications, from the simplest shutoff valves to the various valves used in extremely complex automatic control systems.

[0003] Ball valve is also a common valve body on the market. The top-mounted ball valves on the market are usually used in normal temperature or ultra-low temperature conditions. They are all made of soft materials and cannot be used in ultra-high temperature and high pressure conditions of boiling bed hydrogenation units above 400°C and pressure exceeding 20MPa.

[0004] The document number is CN211715815U, which is an integrated high-temperature metal sealing ball valve, including a valve body, a spring seat, a first sleeve, a second sleeve, a packing gland, a bushing, an elastic baffle for the shaft, a key, a first nut, a bolt, a cylindrical pin, a second nut, a first hexagon socket screw, a second hexagon socket screw, a third hexagon socket screw, and a washer. A ball is arranged at the bottom end of the valve body, a rear valve seat is arranged on one side of the valve body, and a front valve seat is arranged on the other side of the valve body. The elastic baffle for the shaft is fixed on the upper surface of the gasket, and the key is arranged between the glove handle and the valve stem. Although the technical solution adopts spring seat pre-tightening, under the condition of low medium pressure, it can only establish a sealed connection between the ball and the front valve seat, and cannot ensure a sealed connection between the rear valve seat and the valve body, nor can it ensure a sealed connection between the valve stem and the valve body, and a sealed connection between the valve body and the valve cover. There is a possibility of leakage in many places, and it is not suitable for high temperature working conditions. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a high-temperature and high-pressure top-mounted floating ball valve for a fluidized bed hydrogenation device to solve one or more problems in the prior art.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] A high-temperature and high-pressure top-mounted floating ball valve for a fluidized bed hydrogenation device, comprising a valve body, a valve cover arranged at the far end of the valve body, an inlet and an outlet on both sides of the valve body, a valve cavity is provided in the valve body, a floating ball is installed in the valve cavity, a valve stem is arranged through the middle of the valve cover, the proximal end of the valve stem is connected to the floating ball, the valve stem is used to control the floating ball to rotate between an open position and a closed position, a front sealing assembly and a rear sealing assembly are respectively arranged on both sides of the floating ball in the valve cavity, and the through holes in the inlet, the front sealing assembly, the floating ball, the rear sealing assembly, and the outlet are connected to form a flow channel;

[0008] The front sealing assembly includes a front valve seat and a first disc spring arranged at the rear end of the front valve seat, and the rear sealing assembly includes a rear valve seat. An adjustment ring is arranged at the front end of the rear valve seat. The adjustment ring is fixedly connected to the rear valve seat and clamps a part of the valve body so that the rear valve seat is in sealing contact with the valve body. The first disc spring is used to support the inner annular surface of the front valve seat to always be in sealing contact with the outer surface of the floating ball and the outer surface of the floating ball to be in sealing contact with the inner annular surface of the rear valve seat.

[0009] Furthermore, a first step portion is provided on the outer surface of the front valve seat, and a first shoulder portion for accommodating the front sealing assembly is provided at the front end of the valve cavity. The first step portion is in sealing contact with a portion of the first shoulder portion and can slide relative to each other.

[0010] Furthermore, the front sealing assembly includes a first thermal liner, a first pressure ring, a quarter ring, a first pressure ring, a support ring, a first disc spring, and a second pressure ring, which are arranged in the first shoulder from the front end to the rear end in sequence. The first thermal liner is located at the front end of the front valve seat, and the first pressure ring and the quarter ring are sleeved on the outside of the first thermal liner. The outside of the front valve seat is provided with a second step portion at the front end of the first step portion, and the first pressure ring, the support ring, the first disc spring, and the second pressure ring are sleeved on the outside of the second step portion.

[0011] Furthermore, a first notch is provided on the annular surface of the second step portion, and a graphite packing is filled in the first notch; and graphite sealing rings are filled between the support ring and the second step portion and the first shoulder, and between the second pressure ring and the second step portion and the first shoulder.

[0012] Furthermore, a second shoulder for accommodating the rear sealing assembly is formed at the rear end of the valve cavity, a second protrusion is arranged inside the second shoulder, and the second protrusion is clamped between the adjustment ring and the rear valve seat to form a sealing contact.

[0013] Furthermore, the rear sealing assembly also includes a second thermal liner and a short tube arranged in the second shoulder, the short tube is located at the rear end of the adjustment ring, and the short tube, the adjustment ring and a part of the rear end of the rear valve seat are sleeved on the outside of the second thermal liner.

[0014] Furthermore, a second notch is provided on the annular surface of the rear valve seat, and a graphite sealing ring is filled in the second notch.

[0015] Furthermore, a third notch cooperating with the valve cover is provided at the far end of the valve body, a winding gasket is provided at the proximal end of the third notch, and a sealing ring is provided at the side of the third notch.

[0016] Furthermore, the valve cover and the valve body are connected via a second fixing member.

[0017] Furthermore, a step hole is provided in the valve cover for the valve stem to pass through, a sealing sleeve assembly is provided at the far end of the step hole, the sealing sleeve assembly is in sealing contact with the valve stem, and a clamping assembly is provided at the proximal end of the step hole, the clamping assembly is used to clamp the valve stem so that a connecting block connected to the proximal end of the valve stem is in sealing contact with the valve cover.

[0018] Furthermore, the clamping assembly includes a second disc spring and a second pressure ring, the second pressure ring is fixed at the proximal end of the valve cover, and the second pressure ring extends out of the valve cover toward a portion of the connecting block, one end of the second disc spring abuts against the distal end of the second pressure ring extending out of the valve cover, and the other end abuts against the proximal end of the connecting block.

[0019] Furthermore, the sealing sleeve assembly includes a first sleeve, a packing, a packing gland, and a packing gland, which are sequentially arranged in the step hole from the proximal end to the distal end, and the packing gland is connected to the distal end of the valve cover through a third fixing member.

[0020] Furthermore, the through holes of the front valve seat, the rear valve seat and the floating ball are all hexagonal.

[0021] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0022] (I) A high-temperature and high-pressure top-mounted floating ball valve for a fluidized bed hydrogenation device of the present invention, when the medium pressure is low, the rear valve seat is pre-tightened by the first fixing member of the adjusting ring, providing an initial sealing pressure ratio between the rear end of the rear valve seat and the second protrusion of the valve body, the inner annular surface of the front valve seat supported by the first disc spring is always in sealing contact with the outer surface of the floating ball, because the floating ball is floating, the floating ball transmits the supporting force to the rear valve seat, the outer surface of the floating ball is in sealing contact with the inner annular surface of the rear valve seat, and can also provide a sealing pressure ratio between the rear end of the rear valve seat and the second protrusion of the valve body, thereby ensuring the sealing performance between the ball and the front valve seat, the rear valve seat and the sealing performance between the rear valve seat and the valve body.

[0023] (ii) Further, the second disc spring provides an upward pressure to the connecting block so that the sealing surface between the thrust washers and the sealing surface between the thrust washers and the valve cover reach a set sealing pressure ratio, thereby ensuring the sealing performance between the valve stem and the valve cover.

[0024] (III) Furthermore, a third slot cooperating with the valve cover is provided at the far end of the valve body, a winding gasket is provided at the proximal end of the third slot, and a sealing ring is provided at the side of the third slot. A metal winding gasket and a C-type metal sealing ring are used to form a double seal. The winding gasket is placed in front of the sealing ring. The first seal effectively isolates the influence of medium particles on the C-type metal sealing ring, and the second seal ensures the sealing performance between the valve body and the valve cover.

[0025] (IV) Furthermore, a first notch is provided at the far end of the second step portion, and a graphite packing is filled in the first notch; a graphite sealing ring is filled between the support ring, the second pressure ring and the second step portion, thereby isolating the influence of medium particles on the front sealing assembly and ensuring the circumferential sealing performance of the front sealing assembly; a second notch is provided at the rear end of the rear valve seat, and a graphite sealing ring is filled in the second notch, thereby effectively preventing medium particles from entering the rear end of the rear valve seat and ensuring the circumferential sealing performance of the rear sealing assembly.

[0026] (V) Furthermore, the through holes of the front valve seat, the rear valve seat, and the floating ball are all hexagonal, which can effectively reduce the medium flow rate by more than 30% compared with the circular through holes within the angle range of opening and closing of the flow channel, greatly improve the erosion resistance of the sealing surface, and extend the service life of the ball valve. The total shear force of the hexagonal flow channel at each rotation angle is significantly smaller than that of the circular flow channel. Such a design is more conducive to reducing the wear of the ball and the valve seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic structural diagram of a high-temperature and high-pressure top-mounted floating ball valve for a fluidized bed hydrogenation device provided in Example 1 of the present invention is shown.

[0028] Figure 2 A schematic diagram of the enlarged structure of point A in a high-temperature and high-pressure top-mounted floating ball valve for a fluidized bed hydrogenation device provided in Example 1 of the present invention is shown.

[0029] Figure 3 A schematic diagram of the enlarged structure of point B in a high-temperature and high-pressure top-mounted floating ball valve for a fluidized bed hydrogenation device provided in Example 1 of the present invention is shown.

[0030] Figure 4 The enlarged structural schematic diagram of point C in a high-temperature and high-pressure top-mounted floating ball valve for a fluidized bed hydrogenation device provided in Example 1 of the present invention is shown.

[0031] Figure 5 The enlarged structural schematic diagram of point D in a high-temperature and high-pressure top-mounted floating ball valve for a fluidized bed hydrogenation device provided in Example 1 of the present invention is shown.

[0032] Figure 6The diagram shows an enlarged structural diagram of point E in a high-temperature and high-pressure top-mounted floating ball valve for a fluidized bed hydrogenation device provided in Example 1 of the present invention.

[0033] Figure 7 The schematic diagram shows the structure of a hexagonal flow channel in a high-temperature and high-pressure top-mounted floating ball valve for a fluidized bed hydrogenation device provided in Example 1 of the present invention when it is opened.

[0034] Figure 8 A schematic diagram of shear force when a hexagonal flow channel in a high-temperature and high-pressure top-mounted floating ball valve for a fluidized bed hydrogenation device provided in Example 1 of the present invention is opened is shown.

[0035] Markings in the accompanying drawings:

[0036] 1. Valve body; 11. Inlet; 12. Outlet; 13. Valve cavity; 131. First shoulder; 1311. First raised portion; 132. Second shoulder; 1321. Second raised portion; 14. First through hole; 15. Third notch; 151. Wrapped gasket; 152. Sealing ring; 2. Valve cover; 21. Second fixing piece; 211. Full-thread stud; 212. Hexagonal nut; 213. First gasket; 214. Internally threaded cylindrical pin; 22. Step hole; 23. First sleeve; 24. Packing; 25. Packing gland; 26. Packing gland; 27. Third fixing piece; 3. Valve stem; 31. Connecting block; 311. Extension; 32. Clamping assembly; 321. Thrust washer; 322. Second sleeve; 32 3. Second disc spring; 324. Second pressure ring; 325. Fourth fixing piece; 4. Actuator; 5. Front sealing assembly; 51. First thermal lining tube; 511. Quarter ring; 512. First pressure ring; 52. Front valve seat; 521. First step portion; 522. Second step portion; 5221. First pressure ring; 5222. Graphite sealing ring; 5223. Support ring; 5224. First disc spring; 5225. Second pressure ring; 523. First notch; 5231. Graphite packing; 6. Rear sealing assembly; 61. Second thermal lining tube; 62. Rear valve seat; 621. Second notch; 63. Short tube; 64. Adjustment ring; 65. First fixing piece; 651. Second screw; 652. Second gasket; 7. Floating ball. DETAILED DESCRIPTION

[0037] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the attached drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the attached drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any modification of the structure, change of the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0038] In the description of the present invention, the orientations or positional relationships indicated by terms such as “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, and “circumferential” are defined as orientations or positional relationships based on those shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] In order to more clearly describe the structure of the high-temperature and high-pressure top-mounted floating ball valve for the above-mentioned fluidized bed hydrogenation device, the present invention defines the terms "distal end" and "proximal end", "front end" and "rear end". Specifically, the "distal end" refers to the end close to the actuator 4, the "proximal end" refers to the end away from the actuator 4, the "front end" refers to the end close to the fluid inlet direction, and the "rear end" refers to the end away from the fluid inlet direction. Figure 1 For example, Figure 1 The lower end of the middle valve cover 2 is the proximal end. Figure 1 The upper end of the middle valve cover 2 is the distal end. Figure 1 The right side of the middle valve body 1 is the front end. Figure 1 The left side of the middle valve body 1 is the rear end.

[0040] Embodiment 1

[0041] Please refer to Figure 1 , Figure 2 and Figure 3 A high-temperature and high-pressure top-mounted floating ball valve for a fluidized bed hydrogenation device, comprising a valve body 1, a valve cover 2 arranged at the far end of the valve body 1, a first through hole 14 is provided at the far end of the valve body 1 for a part of the proximal end of the valve cover 2 to be inserted, an inlet 11 and an outlet 12 are provided on both sides of the valve body 1, a valve cavity 13 is provided in the valve body 1, a floating ball 7 is installed in the valve cavity 13, a valve stem 3 is provided through the middle of the valve cover 2, a proximal end of the valve stem 3 is connected to the floating ball 7, the valve stem 3 is used to control the floating ball 7 to rotate between an open position and a closed position, a front sealing assembly 5 and a rear sealing assembly 6 are respectively provided on both sides of the floating ball 7 in the valve cavity 13, and the through holes in the inlet 11, the front sealing assembly 5, the floating ball 7, the rear sealing assembly 6, and the outlet 12 are connected to form a flow channel;

[0042] The front sealing assembly 5 includes a front valve seat 52 and a first disc spring 5224 arranged at the front end of the front valve seat 52, and the rear sealing assembly 6 includes a rear valve seat 62. An adjustment ring 64 is arranged at the rear end of the rear valve seat 62. The adjustment ring 64 is connected to the rear valve seat 62 through a first fixing member 65 and clamps a part of the valve body 1, so that the rear valve seat 62 is in sealing contact with the valve body 1. The first disc spring 5224 is used to support the inner annular surface of the front valve seat 52 to always be in sealing contact with the outer surface of the floating ball 7 and the outer surface of the floating ball 7 to be in sealing contact with the inner annular surface of the rear valve seat 62.

[0043] The specific structures of the front sealing assembly 5 and the rear sealing assembly 6 are described below:

[0044] Please refer to Figure 1 and Figure 3 Furthermore, a first step portion 521 is provided on the outer surface of the front valve seat 52, and a first shoulder portion 131 for accommodating the front sealing assembly 5 is provided at the front end of the valve cavity 13. A first protrusion 1311 is provided on the inner side of the first shoulder portion 131. The first protrusion 1311 is in sealing contact with the first step portion 521. There is a gap between the first step portion 521 and the first protrusion 1311, so that the first step portion 521 can slide relative to the first protrusion 1311.

[0045] Please refer to Figure 1 and Figure 3 Further, the front sealing assembly 5 includes a first thermal liner 51, a first pressure ring 512, a quarter ring 511, a first pressure ring 5221, a support ring 5223, a first disc spring 5224, and a second pressure ring 5225, which are sequentially sleeved in the first shoulder 131 from the front end to the rear end. The first thermal liner 51 is located at the front end of the front valve seat 52. The first pressure ring 512 and the quarter ring 511 are sleeved on the outside of the first thermal liner 51. The outside of the front valve seat 52 is provided with a second step portion 522 at the front end of the first step portion 521. The first pressure ring 5221, the support ring 5223, the first disc spring 5224, and the second pressure ring 5225 are sleeved on the outside of the second step portion 522. The ceramic material is sprayed on the outside of the first thermal liner 51, which effectively isolates the thermal stress generated by the instantaneous high temperature from the thermal shock to the valve body 1, and prevents the valve body 1 from cracking.

[0046] Please refer to Figure 1 and Figure 3 Furthermore, a first notch 523 is provided on the annular surface of the second step portion 522, and a graphite packing 5231 is filled in the first notch 523; a graphite sealing ring 5222 is filled between the support ring 5223 and the second step portion 522 and the first shoulder 131, and between the second pressure ring 5225 and the second step portion 522 and the first shoulder 131, so as to improve the sealing performance.

[0047] Please refer to Figure 1 and Figure 2 Furthermore, the rear end of the valve cavity 13 is provided with a second shoulder 132 for accommodating the rear sealing assembly 6, and a second protrusion 1321 is arranged inside the second shoulder 132. The adjustment ring 64 is connected to the rear valve seat 62 through a first fixing member 65, and a groove for accommodating the second protrusion 1321 is provided between the adjustment ring 64 and the rear valve seat 62, so that the adjustment ring 64 and the rear valve seat 62 are pressed against the second protrusion 1321, providing an initial sealing pressure ratio between the rear valve seat 62 and the valve body 1 under a low pressure state, thereby ensuring the sealing performance. Preferably, the first fixing member 65 includes a second screw 651 and a second gasket 652, and the second screw 651 passes through the second gasket 652 and is threadedly connected to the rear valve seat 62.

[0048] Please refer to Figure 1 and Figure 2 Furthermore, the rear sealing assembly 6 also includes a second thermal liner 61 and a short tube 63 disposed in the second shoulder 132. The short tube 63 is located at the rear end of the adjustment ring 64. The short tube 63, the adjustment ring 64 and a part of the rear end of the rear valve seat 62 are sleeved on the outside of the second thermal liner 61. The short tube 63 is used to support the adjustment ring 64 to ensure the sealing effect. The ceramic material is sprayed on the outside of the second thermal liner 61 to effectively isolate the thermal stress generated by the instantaneous high temperature from the thermal shock to the valve body 1, and prevent the valve body 1 from cracking.

[0049] Please refer to Figure 1 and Figure 2 Furthermore, a second notch 621 is formed on the annular surface of the rear valve seat 62 , and a graphite sealing ring 5222 is filled in the second notch 621 , which effectively prevents medium particles from entering the rear end of the rear valve seat 62 , thereby ensuring the sealing performance of the rear end of the rear valve seat 62 .

[0050] The specific structure of the valve cover 2 is described below:

[0051] Please refer to Figure 1 and Figure 4Furthermore, the valve body 1 has a third annular notch 15 at the far end thereof that matches the valve cover 2. A winding gasket 151 is disposed at the proximal end of the third notch 15. A sealing ring 152 is disposed on the side of the third notch 15. A metal winding gasket and a C-type metal sealing ring 152 are used to form a double seal. The winding gasket 151 is placed before the sealing ring 152. The first seal effectively isolates the influence of the medium particles on the C-type metal sealing ring 152. The C-type metal sealing ring 152 is attached to the surface of the valve body 1 and the valve cover 2 by elastic deformation along its axis to prevent medium leakage. The C-type metal sealing ring 152 is preferably a high-temperature memory alloy that maintains its original shape after being compressed, such as Hastelloy, chromium-nickel-inconel, monel, chromium-nickel alloy, HPA cobalt alloy, etc.

[0052] Please refer to Figure 1 Further, the valve cover 2 is connected to the valve body 1 through a second fixing member 21. Preferably, the second fixing member 21 comprises a full-thread stud 211, a hexagonal nut 212, a first gasket 213, and an internally threaded cylindrical pin 214. The full-thread stud 211 passes through the first gasket 213 and is threadedly connected to the valve cover 2. The hexagonal nut 212 is threadedly connected to the full-thread stud 211 to press the valve cover 2. The internally threaded cylindrical pin 214 is used for positioning between the valve body 1 and the valve cover 2.

[0053] Please refer to Figure 7 , Figure 7 The schematic diagram of the ball rotating to partially open the channel. Furthermore, the through holes of the front valve seat 52, the rear valve seat 62, and the floating ball 7 are all hexagonal, which can effectively reduce the medium flow rate by more than 30% within the 15° angle range of the flow channel opening and closing, greatly improve the erosion resistance of the sealing surface, and extend the service life of the ball valve. Please refer to Figure 8 The total shear force of the hexagonal flow channel at each rotation angle is significantly smaller than that of the circular flow channel. This design is more conducive to reducing the wear of the ball and valve seat.

[0054] Please refer to Figure 1 , Figure 5 and Figure 6 Furthermore, a step hole 22 is provided in the valve cover 2 for the valve stem 3 to pass through, a sealing sleeve assembly is provided at the far end of the step hole 22, and the sealing sleeve assembly is in sealing contact with the valve stem 3, and a clamping assembly 32 is provided at the proximal end of the step hole 22, and the clamping assembly 32 is used to clamp the valve stem 3 so that a connecting block 31 connected to the proximal end of the valve stem 3 is in sealing contact with the valve cover 2.

[0055] The specific structure of the pressing assembly 32 and the sealing sleeve assembly is described below:

[0056] Please refer to Figure 1 and Figure 5Furthermore, the clamping assembly 32 includes a second disc spring 323 and a second pressure ring 324, the second pressure ring 324 is fixed at the proximal end of the valve cover 2, and the second pressure ring 324 extends out of the valve cover 2 toward a portion of the connecting block 31, one end of the second disc spring 323 abuts against the distal end of the portion of the second pressure ring 324 extending out of the valve cover 2, and the other end abuts against the proximal end of the connecting block 31.

[0057] Please refer to Figure 1 and Figure 5 Furthermore, the clamping assembly 32 also includes a thrust washer 321 arranged between the connecting block 31 and the step hole 22. The surface of the thrust washer 321 after matching grinding can achieve self-tight sealing and guide the valve stem 3 at the same time.

[0058] Please refer to Figure 1 and Figure 5 Specifically, the connecting block 31 is provided with extensions 311 on both sides, the other end of the second disc spring 323 abuts against the extensions 311, the extensions 311, the valve cover 2, and the second pressing ring 324 extend out of the valve cover 2 to form a groove (not marked in the figure), and the groove provides a deformation space for the second disc spring 323 to prevent the second disc spring 323 from deforming excessively. The initial sealing specific pressure of the sealing surface between the thrust washer 321 and the sealing surface between the thrust washer 321 and the valve cover 2 is given by the second disc spring 323, and the second disc spring 323 is pressed by the second pressing ring 324, so that the second disc spring 323 provides an upward pressure to the connecting block 31.

[0059] Please refer to Figure 1 and Figure 5 Furthermore, the clamping assembly 32 also includes a second sleeve 322 sleeved on the side of the connecting block 31, and the second sleeve 322 is arranged in the gap between the extension portion 311 and the proximal end of the step hole 22, and is used to guide the pressure on the valve stem 3 to become a vertical force.

[0060] Preferably, the second pressure ring 324 is fixed to the proximal end of the valve cover 2 through a fourth fixing member 325 , and the fourth fixing member 325 includes a hexagon socket screw and an anti-loosening washer, and the hexagon socket screw passes through the anti-loosening washer and is threadedly connected to the proximal end of the valve cover 2 .

[0061] Please refer to Figure 1 and Figure 6Further, the sealing sleeve assembly includes a first sleeve 23, a packing 24, a packing gland 25, and a packing gland 26 which are sequentially arranged in the step hole 22 from the proximal end to the distal end, and the packing gland 26 is connected to the distal end of the valve cover 2 through a third fixing member 27. The third fixing member 27 includes a full-thread stud 211, a locking nut, a disc spring limiting sleeve, and a disc spring. The disc spring is arranged in the disc spring limiting sleeve. The full-thread stud 211 passes through the disc spring limiting sleeve and the disc spring and is threadedly connected to the valve cover 2. The locking nut is threadedly connected to the full-thread stud 211 to compress the disc spring limiting sleeve.

[0062] The specific workflow of the present invention is as follows:

[0063] The operator operates the actuator 4 to drive the valve stem 3 to rotate the floating ball 7, so that the flow channel in the valve body 1 is connected, and the medium passes through the through holes in the inlet 11, the first thermal liner 51, the front valve seat 52, the floating ball 7, the rear valve seat 62, the second thermal liner 61, and the outlet 12 and flows out. When the medium pressure is high, the pressure provided by the medium to the floating ball 7 is sufficient to make the sealing surface between the floating ball 7 and the rear valve seat 62 and the sealing surface between the rear valve seat 62 and the first protrusion 1311 of the valve body 1 reach the set sealing pressure ratio. Since the floating ball 7 is floating, the first disc spring 5224 supports the inner annular surface of the front valve seat 52 to always be in sealing contact with the outer surface of the floating ball 7 and the outer surface of the floating ball 7 is in sealing contact with the inner annular surface of the rear valve seat 62. The upward pressure provided by the medium to the connection block 31 is sufficient to make the sealing surface between the thrust washer 321 and the sealing surface between the thrust washer 321 and the valve cover 2 reach the set sealing pressure ratio.

[0064] When the medium pressure is low, the rear valve seat 62 is pre-tightened by the first fixing member 65 of the adjusting ring 64 to provide an initial sealing pressure ratio between the rear end of the rear valve seat 62 and the second protrusion 1321 of the valve body 1. Since the floating ball 7 is floating, the first disc spring 5224 supports the inner annular surface of the front valve seat 52 to always be in sealing contact with the outer surface of the floating ball 7, and the outer surface of the floating ball 7 is in sealing contact with the inner annular surface of the rear valve seat 62. The second disc spring 323 provides upward pressure to the connecting block 31 so that the sealing surface between the thrust gasket 321 and the sealing surface between the thrust gasket 321 and the valve cover 2 reach the set sealing pressure ratio.

[0065] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A high temperature and high pressure top mounted floating ball valve for a fluidized bed hydrogenation unit. Features: The invention comprises a valve body (1), a valve cover (2) arranged at the far end of the valve body (1), the valve body (1) having an inlet (11) and an outlet (12) on both sides, the valve body (1) having a valve cavity (13) arranged in the valve body (1), a floating ball (7) installed in the valve cavity (13), a valve stem (3) passing through the middle of the valve cover (2), the proximal end of the valve stem (3) being connected to the floating ball (7), the valve stem (3) being used to control the floating ball (7) to rotate between an open position and a closed position, a front sealing assembly (5) and a rear sealing assembly (6) are respectively arranged on both sides of the floating ball (7) in the valve cavity (13), and the through holes in the inlet (11), the front sealing assembly (5), the floating ball (7), the rear sealing assembly (6) and the outlet (12) are connected to form a flow channel; The front sealing assembly (5) includes a front valve seat (52) and a first disc spring (5224) arranged at the front end of the front valve seat (52); the rear sealing assembly (6) includes a rear valve seat (62); an adjustment ring (64) is arranged at the rear end of the rear valve seat (62); the adjustment ring (64) is fixedly connected to the rear valve seat (62) and clamps a part of the valve body (1) so that the rear valve seat (62) is in sealing contact with the valve body (1); the first disc spring (5224) is used to support the inner annular surface of the front valve seat (52) to always be in sealing contact with the outer surface of the floating ball (7) and the outer surface of the floating ball (7) to be in sealing contact with the inner annular surface of the rear valve seat (62).

2. A high temperature and high pressure top mounted floating ball valve for a fluidized bed hydrogenation device as claimed in claim 1, Features: A first step portion (521) is provided on the outer surface of the front valve seat (52), and a first shoulder portion (131) for accommodating the front sealing assembly (5) is provided at the front end of the valve cavity (13), and the first step portion (521) is in sealing contact with a portion of the first shoulder portion (131) and can slide relative to each other.

3. A high temperature and high pressure top mounted floating ball valve for a fluidized bed hydrogenation device as claimed in claim 2, Features: The front sealing assembly (5) comprises a first thermal liner (51), a first pressure ring (512), a quarter ring (511), a first pressure ring (5221), a support ring (5223), a first disc spring (5224), and a second pressure ring (5225) which are sequentially arranged in the first shoulder (131) from the front end to the rear end, wherein the first thermal liner (51) is located at the front end of the front valve seat (52), the first pressure ring (512) and the quarter ring (511) are sleeved on the outside of the first thermal liner (51), and the outside of the front valve seat (52) is provided with a second step portion (522) at the front end of the first step portion (521), and the first pressure ring (5221), the support ring (5223), the first disc spring (5224), and the second pressure ring (5225) are sleeved on the outside of the second step portion (522).

4. A high-temperature and high-pressure top-mounted floating ball valve for a fluidized bed hydrogenation device as claimed in claim 3, Features: A first notch (523) is provided on the annular surface of the second step portion (522), and a graphite packing (5231) is filled in the first notch (523); a graphite sealing ring (5222) is filled between the support ring (5223) and the second step portion (522) and the first shoulder portion (131), and between the second pressure ring (5225) and the second step portion (522) and the first shoulder portion (131).

5. A high temperature and high pressure top mounted floating ball valve for a fluidized bed hydrogenation device as claimed in claim 1, Features: The rear end of the valve cavity (13) is provided with a second shoulder (132) for accommodating the rear sealing assembly (6), and a second protrusion (1321) is arranged inside the second shoulder (132). The second protrusion (1321) is clamped between the adjustment ring (64) and the rear valve seat (62) to form a sealing contact.

6. A high temperature and high pressure top mounted floating ball valve for a fluidized bed hydrogenation device as claimed in claim 5, Features: The rear sealing assembly (6) further comprises a second heat liner (61) and a short tube (63) arranged in the second shoulder (132); the short tube (63) is located at the rear end of the adjustment ring (64); the short tube (63), the adjustment ring (64) and a part of the rear end of the rear valve seat (62) are sleeved on the outside of the second heat liner (61).

7. A high temperature and high pressure top mounted floating ball valve for a fluidized bed hydrogenation device as claimed in claim 6, Features: A second notch (621) is provided on the annular surface of the rear valve seat (62), and a graphite sealing ring (5222) is filled in the second notch (621).

8. A high temperature and high pressure top mounted floating ball valve for a fluidized bed hydrogenation device as claimed in claim 1, Features: The valve body (1) further has a third notch (15) at the far end thereof which cooperates with the valve cover (2); a winding pad (151) is arranged at the proximal end of the third notch (15); and a sealing ring (152) is arranged at the side of the third notch (15).

9. A high temperature and high pressure top mounted floating ball valve for a fluidized bed hydrogenation device as claimed in claim 8, Features: The valve cover (2) and the valve body (1) are connected via a second fixing member (21).

10. A high temperature and high pressure top mounted floating ball valve for a fluidized bed hydrogenation device as claimed in claim 1, Features: The valve cover (2) is provided with a stepped hole (22) for the valve stem (3) to pass through, a sealing sleeve assembly is arranged at the far end of the stepped hole (22), and the sealing sleeve assembly is in sealing contact with the valve stem (3), and a clamping assembly (32) is arranged at the proximal end of the stepped hole (22), and the clamping assembly (32) is used to clamp the valve stem (3) so that a connecting block (31) connected to the proximal end of the valve stem (3) is in sealing contact with the valve cover (2).

11. A high temperature and high pressure top mounted floating ball valve for a fluidized bed hydrogenation device as claimed in claim 10, Features: The clamping assembly (32) includes a second disc spring (323) and a second pressure ring (324), wherein the second pressure ring (324) is fixed to the proximal end of the valve cover (2), and the second pressure ring (324) extends out of the valve cover (2) toward a portion of the connecting block (31), and one end of the second disc spring (323) abuts against the distal end of the portion of the second pressure ring (324) extending out of the valve cover (2), and the other end abuts against the proximal end of the connecting block (31).

12. A high temperature and high pressure top mounted floating ball valve for a fluidized bed hydrogenation device as claimed in claim 11, Features: The sealing sleeve assembly comprises a first shaft sleeve (23), a packing (24), a packing gland (25), and a packing gland (26) which are arranged in sequence from the proximal end to the distal end in the step hole (22); the packing gland (26) is connected to the distal end of the valve cover (2) via a third fixing member (27).

13. A high temperature and high pressure top mounted floating ball valve for a fluidized bed hydrogenation device as claimed in claim 1, Features: The through holes of the front valve seat (52), the rear valve seat (62) and the floating ball (7) are all hexagonal.

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