Control valve of continuous catalyst regeneration device

Abstract

The utility model discloses a continuous catalyst regeneration device control valve which comprises a valve body, a valve cover, a valve rod, a valve core and a valve seat, a valve cavity is arranged in the valve body, two ends of the valve body are respectively provided with a flow channel communicated with the valve cavity, the valve cover is installed at the upper end of the valve body, and the valve rod penetrates through the valve cover and extends into the valve cavity to be in linkage connection with the valve core. The valve seat is mounted in one flow channel; the valve element is in a V-shaped ball shape, an elastic assembly and multiple sets of interval adjusting assemblies are further arranged in the flow channel, the elastic assembly is used for pushing the valve seat to be close to the valve element, an outer groove is formed in the outer circle face of the valve seat, an adjusting inclined face is arranged in the outer groove, and each interval adjusting assembly comprises an adjusting screw. The adjusting screw is connected into the first screw hole in a threaded mode, and the inner end of the adjusting screw extends into the outer groove to abut against the adjusting inclined face. The catalyst ball valve has accurate flow control, and the distance between the valve seat and the valve core can be adjusted, so that accurate and stable operation of a catalyst ball can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a control valve for a continuous catalyst regeneration device. Background Art

[0002] In the continuous catalyst regeneration unit (CCR), the flow of catalyst from the reactor to the regeneration tower needs to be controlled. A special valve is required to control the flow by controlling the catalyst feed, and the catalyst breakage should be reduced to obtain smooth and precise movement of the catalyst balls.

[0003] In the prior art, the special valve designed by FISHER Company of the United States is composed of electric ball VEEBALL, flow ring FLOW RING, gasket seal SHIM SEAL, spring seal SPRING SEAL, retainer ring RETAINER RING, gasket GASKET components, but the control valve of the prior art has many defects:

[0004] The distance between the SHIM SEAL and the electric ball VEEBALL is fixed and cannot be adjusted. The actual distance after installation is also affected by the SHIM SEAL and the GASKET. The distance after installation cannot be measured and checked. The machining dimensional accuracy and the compression ratio of the two sealing gaskets must be fully guaranteed.

[0005] The retainer ring is only fixed by two small screws, which are not enough to prevent the valve from vibrating during long-distance transportation, which may cause the displacement of the parts in the retainer ring seal assembly, thus affecting the relative size and performance of the entire seal assembly. The above-mentioned control valve defects will directly lead to the inability of materials to be smoothly and accurately controlled through the valve, and it is very easy to cause the catalyst ball to be crushed and blocked, which brings serious production and safety problems to the continuous catalyst regeneration device (CCR device).

[0006] In order to solve the above technical problems, the valve can have the functions of precise flow control and adjustable valve seat position to ensure that the catalyst ball can run smoothly and accurately. Therefore, we have made improvements and proposed a continuous catalyst regeneration device control valve. Utility Model Content

[0007] The utility model aims to provide a control valve for a continuous catalyst regeneration device. The utility model not only has accurate flow control, but also has an adjustable distance between a valve seat and a valve core, thereby ensuring accurate and stable operation of a catalyst ball.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a control valve for a continuous catalyst regeneration device, comprising a valve body, a valve cover, a valve stem, a valve core and a valve seat, wherein a valve cavity is arranged in the valve body, and a flow channel connected to the valve cavity is respectively arranged at two ends of the valve body, the valve core is arranged in the valve cavity, the valve cover is installed at the upper end of the valve body, the valve stem penetrates the valve cover and extends into the valve cavity and is linked to the valve core, and the valve seat is installed in one of the flow channels for sealing with the valve core when the valve is closed; the valve core is in the shape of a V-shaped sphere, and an elastic component and a spacing adjustment component are also arranged in the flow channel, the elastic component is used to push the valve seat to make it lean against the valve core, an outer groove is arranged on the outer circumferential surface of the valve seat, an adjusting inclined surface is arranged in the outer groove, and the spacing adjustment component includes an adjusting screw, a first screw hole is radially penetrated on the valve body, the adjusting screw is threadedly connected to the first screw hole, and the inner end of the adjusting screw extends into the outer groove and is tightly pressed against the adjusting inclined surface.

[0009] By adopting the above technical solution, the size and specific shape of the V-shaped valve core can be adjusted according to the requirements and flow characteristics to achieve the circulation and precise adjustment of the catalyst ball medium; when assembling the valve seat, after the outer groove of the valve seat is completely aligned with the corresponding adjustment screw, the adjustment screw can be screwed in. At this time, the ball rotates to the fully closed state, and then the position of the valve seat is adjusted using the adjustment screw in the outer groove of the valve seat. Since there is an adjustment slope in the outer groove of the valve seat, the adjustment screw can be screwed in and out to adjust the spacing between the valve seat and the ball. During the adjustment process, different points (at least 4 symmetrical points) can be tested according to the required spacing size and feeler gauge until the required size is reached. Therefore, the utility model not only has precise flow control, but also the spacing between the valve seat and the valve core can be adjusted, which can ensure the accurate and smooth operation of the catalyst ball.

[0010] The utility model is further configured that the outer end of the adjusting screw is provided with an inner hexagonal groove.

[0011] By adopting the technical solution, it is convenient for the screwdriver to be inserted and rotated to adjust the screw.

[0012] The utility model is further configured that the inner end of the adjusting screw is spherical.

[0013] By adopting the above technical solution, the inner end of the adjusting screw is set to a spherical structure, which cooperates with the adjusting inclined surface of the outer groove of the valve seat, which can reduce the friction between the two and make the adjustment smoother.

[0014] The utility model is further configured that an inner groove is arranged on the inner circular surface of the valve seat.

[0015] By adopting the above technical solution and the design of the inner groove of the inner circular surface of the valve seat, when assembling the valve seat, the inner groove of the valve seat can be pulled with a tool to make the outer groove of the valve seat correspond to the corresponding adjusting screw.

[0016] The utility model is further configured such that the spacing adjustment component also includes a plug and a first leaf spring, a second screw hole is provided on the outer end of the valve body corresponding to the first screw hole, the plug is threadedly connected to the second screw hole, the first leaf spring is clamped between the plug and the adjustment screw, and a first sealing gasket is clamped between the plug and the valve body.

[0017] By adopting the above technical solution, the design of the plug and the first sealing gasket has a sealing effect, which can prevent external media from entering the valve body. At the same time, a first leaf spring is arranged between the plug and the adjusting screw. The first leaf spring applies a reaction force to the plug and the adjusting screw, thereby preventing the plug and the adjusting screw from loosening.

[0018] The utility model is further configured as follows: the elastic component includes a locking ring, a second leaf spring, a spring seat and a sealing ring, the locking ring being threadedly connected to the inner wall of the flow channel, and the outer end of the locking ring is provided with a limiting flange for abutting against the outer end of the valve body, and a second sealing gasket is clamped between the limiting flange and the outer end of the valve body; the outer circumferential surface of the valve seat close to one end of the locking ring is provided with an annular groove, the inner end of the locking ring extends into the annular groove, so that a leaf spring cavity is formed between the locking ring, the valve body and the valve seat, the second leaf spring and the spring seat are arranged in the leaf spring cavity, one end of the second leaf spring abuts against the inner end of the locking ring, and the other end of the second leaf spring abuts against the spring seat, the outer circumferential surface of the valve seat is provided with a sealing groove connected to the annular groove, the spring seat presses the sealing ring in the sealing groove, the cross-section of the sealing ring is conical, and the inner end of the spring seat and the inner end of the sealing groove are both inclined surface shapes adapted to the two ends of the sealing ring.

[0019] By adopting the above technical solution, the elastic component can cause the valve seat to move toward the valve core, and the spring seat presses the sealing ring into the sealing groove under the action of the second leaf spring. Due to the special structural design of the sealing ring, it can produce radial deformation under pressure, thereby further improving the sealing performance between the outer circular surface of the valve seat and the inner circular surface of the flow channel.

[0020] The utility model is further configured such that a first sand-proof ring for tightly fitting with the inner circular surface of the flow channel and a second sand-proof ring for tightly fitting with the inner circular surface of the locking ring are respectively installed at positions of the outer circular surface of the valve seat corresponding to the inner and outer ends of the leaf spring cavity.

[0021] By adopting the above technical solution, it is possible to prevent particles such as catalysts from invading the leaf spring cavity, thereby ensuring that the leaf spring cavity is highly clean.

[0022] The utility model is further configured that a limit assembly is also provided at a position of the inner end of the flow channel corresponding to the valve cavity, and the limit assembly includes a limit plate, a four-open ring and a plurality of locking screws. The four-open ring is formed into a circular ring shape by four arc plates, and an annular protrusion is provided on the outer periphery of the four-open ring. An annular groove matching the annular protrusion is provided on the inner wall of the valve cavity. A plurality of third screw holes corresponding to the locking screws are provided on the four-open ring, and a plurality of through holes corresponding to the third screw holes are provided on the limit plate. The locking screws pass through the corresponding through holes and are screwed into the corresponding third screw holes to lock the limit plate and connect it to the four-open ring to constitute an inner stroke limit for the valve seat.

[0023] By adopting the above technical solution, since the design is a top-mounted valve cover structure and a limit assembly with a limit plate is provided for the valve seat, the valve core can be taken out for inspection and maintenance by opening the valve cover when the vehicle is stopped, and the valve seat and other components can also be directly removed and taken out from the upper end of the valve body without removing the valve from the pipeline.

[0024] The utility model is further configured to include a packing sealing assembly, which includes a packing pressure plate, a packing sleeve and a sealing packing. The valve cover is provided with a packing groove coaxial with the valve stem. The packing pressure plate is connected to the valve cover through an adjusting bolt, and multiple disc springs are sandwiched between the nut of the adjusting bolt and the packing pressure plate. The packing pressure plate is pressed against the upper end of the packing sleeve, so that the packing sleeve presses the sealing packing in the packing groove.

[0025] By adopting the above technical solution, the sealing performance between the valve stem and the valve cover can be guaranteed to prevent the medium from leaking from the gap between the two. At the same time, the sealing structure is a "live load" sealing structure, which is pre-tightened and limited by multiple disc springs, and the sealing performance will not be affected by the operator and the temperature change of the medium.

[0026] The utility model is further configured that the valve cavity surface, the flow channel surface, the valve core surface and the valve seat surface are all provided with a hardened layer.

[0027] By adopting the above technical solution, the erosion and wear of the medium can be prevented and the service life of the valve can be extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0029] Figure 2 It is a top view of the utility model as a whole;

[0030] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of the middle part A;

[0031] Figure 4 This is a schematic diagram of the state in which the adjusting screw of the utility model exits the outer groove of the valve seat;

[0032] Figure 5 This is a schematic diagram of the state in which the adjusting screw of the utility model is screwed into the outer groove of the valve seat;

[0033] Figure 6 This is a schematic diagram of the structure of the four-open loop of the utility model;

[0034] Figure 7 It is a cross-sectional view of the four open rings of the utility model;

[0035] Figure 8 This is a schematic diagram of the structure of the packing seal assembly of the utility model;

[0036] Fig. 9 It is a structural schematic diagram of the valve core of the utility model.

[0037] In the figure: 1, valve body; 2, valve cover; 3, valve stem; 4, valve core; 5, valve seat; 6, valve cavity; 7, flow channel; 8, elastic component; 9, spacing adjustment component; 10, outer groove; 11, adjustment slope; 12, adjustment screw; 13, first screw hole; 14, hexagonal groove; 15, inner groove; 16, plug; 17, first leaf spring; 18, second screw hole; 19, first sealing gasket; 20, locking ring; 21, second leaf spring; 22, spring seat; 23, sealing ring; 24, limit cam Edge; 25, second sealing gasket; 26, annular groove; 27, leaf spring cavity; 28, sealing groove; 29, first sand prevention ring; 30, second sand prevention ring; 31, limit assembly; 32, limit plate; 33, four open rings; 34, locking screw; 35, annular protrusion; 36, annular groove; 37, third screw hole; 38, through hole; 39, packing sealing assembly; 40, packing pressure plate; 41, packing pressure sleeve; 42, sealing packing; 43, packing groove; 44, adjusting bolt; 45, multiple disc springs. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] Example: As attached Figures 1 to 9A control valve for a continuous catalyst regeneration device shown in the figure comprises a valve body 1, a valve cover 2, a valve stem 3, a valve core 4 and a valve seat 5, wherein a valve cavity 6 is provided in the valve body 1, and a flow channel 7 communicating with the valve cavity 6 is respectively provided at both ends of the valve body 1, the valve core 4 is arranged in the valve cavity 6, the valve cover 2 is mounted on the upper end of the valve body 1, the valve stem 3 penetrates the valve cover 2 and extends into the valve cavity 6 to be linked with the valve core 4, specifically, the upper end of the valve core 4 has a square mortise and tenon, the lower end of the valve core 4 has a rotating shaft, the inner end of the valve stem 3 has a square tenon that fits with the square mortise and tenon, the bottom of the inner cavity of the valve body 1 has a circular groove that matches with the rotating shaft, the outer end of the valve stem 3 is connected to an actuator, the actuator drives the valve stem 3 to rotate, so that the valve stem 3 drives the valve core 4 to rotate, and the valve seat 5 is mounted thereon. A flow channel 7 is used to seal with the valve core 4 when the valve is closed, and the sealing surface of the valve seat 5 is 100% consistent with the sealing surface of the valve core 4; the valve core 4 is in the shape of a V-shaped sphere, and an elastic component 8 and a plurality of spacing adjustment components 9 are also provided in the flow channel 7, and the elastic component 8 is used to push the valve seat 5 to make it lean against the valve core 4. An outer groove 10 is provided on the outer circumferential surface of the valve seat 5, and the outer groove 10 is annular. An adjusting inclined surface 11 is provided in the outer groove 10, and the spacing adjustment component 9 includes an adjusting screw 12, and a first screw hole 13 is radially penetrated on the valve body 1, and the adjusting screw 12 is threadedly connected to the first screw hole 13, and the inner end of the adjusting screw 12 extends into the outer groove 10 and is tightly pressed against the adjusting inclined surface 11. The size and specific shape of the V-shaped valve core 4 can be adjusted according to the requirements and flow characteristics to achieve the circulation and precise adjustment of the catalyst ball medium; when assembling the valve seat 5, after the outer groove 10 of the valve seat 5 is completely aligned with the corresponding adjustment screw 12, the adjustment screw 12 can be screwed in. At this time, the ball rotates to the fully closed state, and then the position of the valve seat 5 is adjusted by using the adjustment screw 12 of the outer groove 10 of the valve seat 5. Since there is an adjustment inclined surface 11 in the outer groove 10 of the valve seat 5, the screwing in and out of the adjustment screw 12 can adjust the spacing size between the valve seat 5 and the ball. During the adjustment process, different points (at least 4 symmetrical points) can be tested according to the required spacing size and the feeler gauge until the required size is reached; if the valve needs to be completely in a fully sealed state, the adjustment screw 12 can be rotated outward to achieve it. Therefore, the utility model not only has precise flow control, but also the spacing between the valve seat 5 and the valve core 4 can be adjusted, which can ensure the accurate and smooth operation of the catalyst ball.

[0040] As attached Figure 3 As shown, the outer end of the adjusting screw 12 is provided with a hexagonal groove 14 to facilitate the insertion of a screwdriver to rotate the adjusting screw 12 .

[0041] As attached Figure 3As shown, the inner end of the adjusting screw 12 is spherical. The inner end of the adjusting screw 12 is set to a spherical structure, which cooperates with the adjusting inclined surface 11 of the outer groove 10 of the valve seat 5, which can reduce the friction between the two and make the adjustment smoother.

[0042] As attached Figure 3 As shown, the inner circumferential surface of the valve seat 5 is provided with an inner groove 15, and the inner groove 15 is annular. The design of the inner groove 15 on the inner circumferential surface of the valve seat 5 allows the inner groove 15 of the valve seat 5 to be pulled by a tool when assembling the valve seat 5, so that the outer groove 10 of the valve seat 5 corresponds to the corresponding adjustment screw 12.

[0043] As attached Figure 3 As shown, the spacing adjustment component 9 also includes a plug 16 and a first leaf spring 17. A second screw hole 18 is provided on the valve body 1 at the outer end corresponding to the first screw hole 13. The plug 16 is threadedly connected to the second screw hole 18. The first leaf spring 17 is sandwiched between the plug 16 and the adjustment screw 12. A first sealing gasket 19 is sandwiched between the plug 16 and the valve body 1. The design of the plug 16 and the first sealing gasket 19 has a sealing effect, which can prevent external media from entering the valve body 1. At the same time, the first leaf spring 17 is provided between the plug 16 and the adjustment screw 12. The first leaf spring 17 applies a reaction force to the plug 16 and the adjustment screw 12, thereby preventing the plug 16 and the adjustment screw 12 from loosening.

[0044] As attached Figure 3As shown, the elastic component 8 includes a locking ring 20, a second leaf spring 21, a spring seat 22 and a sealing ring 23. The locking ring 20 is threadedly connected to the inner wall of the flow channel 7, and the outer end of the locking ring 20 is provided with a limiting flange 24 for abutting against the outer end of the valve body 1. A second sealing gasket 25 is sandwiched between the limiting flange 24 and the outer end of the valve body 1. The second sealing gasket 25 is made of flexible graphite, threaded connection + flexible graphite sealing, and the two are connected to be completely locked and fixed, and will not be affected by handling, transportation and installation, which can ensure the long-term inconvenience of the distance between the valve core 4 and the valve seat 5 after adjustment; the outer circumferential surface of the valve seat 5 close to the locking ring 20 is provided with an annular groove 26, and the locking The inner end of the ring 20 extends into the annular groove 26, so that a leaf spring cavity 27 is formed between the locking ring 20, the valve body 1 and the valve seat 5. The second leaf spring 21 and the spring seat 22 are arranged in the leaf spring cavity 27. One end of the second leaf spring 21 abuts against the inner end of the locking ring 20, and the other end of the second leaf spring 21 abuts against the spring seat 22. A sealing groove 28 connected to the annular groove 26 is provided on the outer circumferential surface of the valve seat 5. The spring seat 22 presses the sealing ring 23 in the sealing groove 28. The cross-section of the sealing ring 23 is conical (isosceles trapezoidal), and the inner end of the spring seat 22 and the inner end of the sealing groove 28 are both inclined surfaces that match the two ends of the sealing ring 23. The elastic component 8 can cause the valve seat 5 to move toward the valve core 4, and the spring seat 22 presses the sealing ring 23 into the sealing groove 28 under the action of the second leaf spring 21. Due to the special structural design of the sealing ring 23, it can produce radial deformation under pressure, further improving the sealing performance between the outer circular surface of the valve seat 5 and the inner circular surface of the flow channel 7.

[0045] As attached Figure 3 As shown, the outer circumference of the valve seat 5 is respectively provided with a first sand-proof ring 29 for tightly fitting with the inner circumference of the flow channel 7 and a second sand-proof ring 30 for tightly fitting with the inner circumference of the locking ring 20 at the inner and outer ends of the leaf spring cavity 27. This design can prevent particles such as catalysts from invading the leaf spring cavity 27, ensuring that the leaf spring cavity 27 is highly clean.

[0046] As attached Figure 3 , 6As shown in Figures 7 and 8, a limit assembly 31 is further provided at a position of the valve cavity 6 corresponding to the inner end of the flow channel 7. The limit assembly 31 includes a limit plate 32, four open rings 33 and a plurality of locking screws 34. The four open rings 33 are formed into a circular ring shape by four arc plates. An annular protrusion 35 is provided on the outer periphery of the four open rings 33. An annular groove 36 matching the annular protrusion 35 is provided on the inner wall of the valve cavity 6. A plurality of third screw holes 37 whose number is equivalent to that of the locking screws 34 are provided on the four open rings 33. A plurality of through holes 38 corresponding to the third screw holes 37 are provided on the limit plate 32. The locking screws 34 pass through the corresponding through holes 38 and are screwed into the corresponding third screw holes 37 to lock the limit plate 32 to the four open rings 33 to constitute an inner stroke limit for the valve seat 5. Since the design is a top-mounted valve cover 2 structure, and a limit assembly 31 with a limit plate 32 is provided for the valve seat 5, the valve core 4 can be taken out for inspection and maintenance by opening the valve cover 2 when the vehicle is stopped, and the valve seat 5 and other components can also be directly removed and taken out from the upper end of the valve body 1 without removing the valve from the pipeline.

[0047] As attached Figure 8 As shown, it also includes a packing seal assembly 39, which includes a packing pressure plate 40, a packing sleeve 41 and a sealing packing 42. The valve cover 2 is provided with a packing groove 43 coaxial with the valve stem 3. The packing pressure plate 40 is connected to the valve cover 2 through an adjusting bolt 44, and a multiple disc spring 45 is sandwiched between the nut of the adjusting bolt 44 and the packing pressure plate 40. The packing pressure plate 40 is pressed against the upper end of the packing sleeve 41, so that the packing sleeve 41 presses the sealing packing 42 in the packing groove 43. This design can ensure the sealing performance between the valve stem 3 and the valve cover 2, and prevent the medium from leaking from the gap between the two. At the same time, the sealing structure is a "live load" sealing structure, which is pre-tightened and limited by multiple disc springs 45, and the sealing performance will not be affected by the operator and the temperature change of the medium.

[0048] In addition, the surfaces of the valve cavity 6, the flow channel 7, the valve core 4 and the valve seat 5 are all provided with a hardened layer, specifically, various hardening measures such as supersonic spraying WC, CrC, STL, etc. are performed on the surfaces. This design can prevent erosion and wear of the medium and extend the service life of the valve.

Claims

1. A control valve for a continuous catalyst regeneration device, comprising a valve body (1), a valve cover (2), a valve stem (3), a valve core (4) and a valve seat (5), wherein the valve body (1) is provided with a valve cavity (6), and both ends of the valve body (1) are respectively provided with a flow channel (7) connected to the valve cavity (6), the valve core (4) is arranged in the valve cavity (6), the valve cover (2) is installed at the upper end of the valve body (1), the valve stem (3) penetrates the valve cover (2) and extends into the valve cavity (6) to be linked with the valve core (4), and the valve seat (5) is installed in one of the flow channels (7) to be sealed with the valve core (4) when the valve is closed; characterized in that: The valve core (4) is in the shape of a V-shaped sphere. An elastic component (8) and a plurality of spacing adjustment components (9) are also provided in the flow channel (7). The elastic component (8) is used to push the valve seat (5) toward the valve core (4). An outer groove (10) is provided on the outer circumferential surface of the valve seat (5). An adjustment inclined surface (11) is provided in the outer groove (10). The spacing adjustment component (9) includes an adjustment screw (12). A first screw hole (13) is radially penetrated on the valve body (1). The adjustment screw (12) is threadedly connected to the first screw hole (13), and the inner end of the adjustment screw (12) extends into the outer groove (10) and is tightly abutted against the adjustment inclined surface (11).

2. A control valve for a continuous catalyst regeneration device according to claim 1, characterized in that: The outer end of the adjusting screw (12) is provided with a hexagonal socket (14).

3. A control valve for a continuous catalyst regeneration device according to claim 1, characterized in that: The inner end of the adjusting screw (12) is spherical.

4. A control valve for a continuous catalyst regeneration device according to claim 1, characterized in that: An inner groove (15) is provided on the inner circumferential surface of the valve seat (5).

5. A control valve for a continuous catalyst regeneration device according to claim 1, characterized in that: The spacing adjustment component (9) also includes a plug (16) and a first leaf spring (17); a second screw hole (18) is provided on the valve body (1) at the outer end corresponding to the first screw hole (13); the plug (16) is threadedly connected to the second screw hole (18); the first leaf spring (17) is clamped between the plug (16) and the adjustment screw (12); and a first sealing gasket (19) is clamped between the plug (16) and the valve body (1).

6. A control valve for a continuous catalyst regeneration device according to claim 1, characterized in that: The elastic component (8) comprises a locking ring (20), a second leaf spring (21), a spring seat (22) and a sealing ring (23); the locking ring (20) is threadedly connected to the inner wall of the flow channel (7), and the outer end of the locking ring (20) is provided with a limiting flange (24) for abutting against the outer end of the valve body (1), and a second sealing gasket (25) is sandwiched between the limiting flange (24) and the outer end of the valve body (1); an annular groove (26) is provided on the outer circumferential surface of one end of the valve seat (5) close to the locking ring (20), and the inner end of the locking ring (20) extends into the annular groove (26), so that a sealing ring (26) is formed between the locking ring (20), the valve body (1) and the valve seat (5). A leaf spring cavity (27) is formed, the second leaf spring (21) and the spring seat (22) are arranged in the leaf spring cavity (27), one end of the second leaf spring (21) abuts against the inner end of the locking ring (20), and the other end of the second leaf spring (21) abuts against the spring seat (22), a sealing groove (28) connected to the annular groove (26) is provided on the outer circumferential surface of the valve seat (5), the spring seat (22) presses the sealing ring (23) in the sealing groove (28), the cross section of the sealing ring (23) is conical, and the inner end of the spring seat (22) and the inner end of the sealing groove (28) are both inclined surfaces that match the two ends of the sealing ring (23).

7. A control valve for a continuous catalyst regeneration device according to claim 6, characterized in that: A first sand-proof ring (29) for tightly fitting with the inner circular surface of the flow channel (7) and a second sand-proof ring (30) for tightly fitting with the inner circular surface of the locking ring (20) are respectively installed at positions of the outer circular surface of the valve seat (5) corresponding to the inner and outer ends of the leaf spring cavity (27).

8. A control valve for a continuous catalyst regeneration device according to claim 1, characterized in that: The valve cavity (6) is also provided with a limit assembly (31) at a position corresponding to the inner end of the flow channel (7), and the limit assembly (31) comprises a limit plate (32), a four-open ring (33) and a plurality of locking screws (34). The four-open ring (33) is formed into a circular ring shape by four arc plates. The outer periphery of the four-open ring (33) is provided with an annular protrusion (35), and the inner wall of the valve cavity (6) is provided with an annular groove (36) matched with the annular protrusion (35). The four-open ring (33) is provided with a plurality of third screw holes (37) whose number is equal to the locking screws (34), and the limit plate (32) is provided with a plurality of through holes (38) corresponding to the third screw holes (37). The locking screws (34) pass through the corresponding through holes (38) and are screwed into the corresponding third screw holes (37), so as to lock and connect the limit plate (32) to the four-open ring (33) to form an inner stroke limit for the valve seat (5).

9. A control valve for a continuous catalyst regeneration device according to claim 1, characterized in that: It also includes a packing seal assembly (39), which includes a packing pressure plate (40), a packing sleeve (41) and a sealing packing (42). The valve cover (2) is provided with a packing groove (43) coaxial with the valve stem (3). The packing pressure plate (40) is connected to the valve cover (2) through an adjusting bolt (44), and a multi-disc spring (45) is sandwiched between the nut of the adjusting bolt (44) and the packing pressure plate (40). The packing pressure plate (40) is pressed against the upper end of the packing sleeve (41), so that the packing sleeve (41) presses the sealing packing (42) in the packing groove (43).

10. A control valve for a continuous catalyst regeneration device according to claim 1, characterized in that: The surface of the valve cavity (6), the surface of the flow channel (7), the surface of the valve core (4) and the surface of the valve seat (5) are all provided with a hardened layer.

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