Spring structure, tube nest comprising spring structure and dismounting tool of tube nest
By adopting integrated elastic component structure and disassembly tools in the column-tube fixed bed reactor, the problem of difficulty in removing traditional springs is solved, rapid catalyst replacement and bed pressure drop control are achieved, and production efficiency is optimized.
Patent Information
- Application Number
- CN202510516875.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2025-09-02
AI Technical Summary
During the process of acrylic oxidation, traditional springs are difficult to remove from the inside of the column tube, making it difficult to clean and replace operations, affecting the long-term stable operation and energy consumption of the catalyst.
The integrated elastic member structure is adopted, including a first spring, a second spring and a shrinkage section. The first spring is conveniently removed by the second spring external support and a dismantling tool, and the inert medium is used to reduce the bed blockage, and the rapid replacement of the spring is achieved in combination with the dismantling tool.
It reduces operation difficulty, extends the service life of the catalyst, optimizes the process operating conditions of the production equipment, and reduces the pressure drop and energy consumption of the bed.
Smart Images
Figure CN120571503A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of packed tube-type fixed bed reactors, and in particular to a spring structure, a tube containing the spring structure, and a disassembly tool thereof. Background Art
[0002] In the process of propylene oxidation to acrolein, Bi2O3-MoO3 catalysts offer the highest activity and selectivity. These catalysts consist of octahedral molybdate ions [MoO6] with Mo=O bonds. However, when MoO3 comes into contact with propylene at 300-500°C, it readily combines with the high-temperature steam and sublimes as MoO3-nH2O, causing a decrease in catalyst activity. This means that from the perspective of the catalyst components themselves, there is a loss of active components due to sublimation.
[0003] The reactor for propylene oxidation to produce acrolein is typically a three-tube-sheet fixed-bed reactor. Catalysts of varying activity are loaded from the inlet to the outlet of the reactor tubes, with a single support spring at the bottom. The three tube sheets are the upper, middle, and lower tube sheets. The middle tube sheet, located in the lower middle portion of the reactor, divides the reactor into two independent compartments: the upper reaction zone and the lower cooling zone. This separates the reactor from the upper reaction zone and prevents the product from further oxidation and forming byproducts. The temperature difference between the reaction and cooling zones is 80-110°C. This relatively large temperature difference can easily lead to the deposition of high-boiling-point organic components in the reaction products at the interface between the reaction and cooling zones. These high-boiling-point organic components are highly viscous and slow-moving, creating a "seed effect" that hinders the flow of material and the loss of active components within the tubes. This leads to a continuous increase in the bed pressure drop, increasing the overall energy consumption of the unit, gradually degrading the catalyst's reactivity, and significantly shortening its service life, seriously impacting the catalyst's long-term stable operation.
[0004] Regarding the above-mentioned related technologies, the inventors believe that it is difficult to eliminate the metal impurities accumulated on one side of the catalyst by using traditional burning methods. If physical methods are used for local decoking, traditional catalysts generally have springs installed inside the tubes when loading. However, when coking occurs inside the tubes, the internal springs are difficult to remove for cleaning or replacement, which makes subsequent operations difficult. Summary of the Invention
[0005] In order to facilitate the removal of the spring located inside the tube, reduce the subsequent cleaning or replacement of the spring, and reduce the difficulty of subsequent operations, the present application provides a spring structure, a tube including the spring structure, and a disassembly tool thereof.
[0006] The spring structure provided in this application adopts the following technical solution:
[0007] A spring structure includes an integrated elastic member located inside a tubular fixed-bed reactor. The integrated elastic member includes a first spring and a second spring arranged opposite to each other. A reduced diameter section is provided between the first spring and the second spring. The reduced diameter section is fixedly connected to the first spring. The other end of the reduced diameter section is fixedly connected to the second spring. The second spring extends from the bottom end of the tubular fixed-bed reactor. The interior of the first spring is filled with an inert medium.
[0008] Optionally, the diameter of the first spring is not greater than the inner diameter of the shell-and-tube fixed-bed reactor, and the diameter of the second spring is not less than the inner diameter of the shell-and-tube fixed-bed reactor.
[0009] Optionally, the outer diameter of the first spring is 0.8-1 times the inner diameter of the shell-and-tube fixed bed reactor.
[0010] Optionally, the diameter of the reduced diameter section gradually increases from the center position toward the two end positions, the diameter at the connection position of the reduced diameter section and the first spring is the same as the bottom diameter of the first spring, and the diameter at the connection position of the reduced diameter section and the second spring is the same as the top diameter of the second spring.
[0011] Optionally, the pitch of the first spring is the same as the pitch of the second spring, and the pitch of the reduced diameter section is smaller than the pitch of the first spring.
[0012] Optionally, a tube-in-tube arrangement includes the spring structure arranged in a tube-in-tube fixed bed reactor.
[0013] Optionally, a disassembly tool is applied to the spring structure, and the disassembly tool is used to disassemble the first spring from the interior of the shell and tube fixed bed reactor, including a support ring, a clamping block is provided inside the support ring, and the clamping block is connected to the second spring.
[0014] Optionally, two clamping blocks are arranged opposite to each other, and a connecting line of the two clamping blocks is arranged along the radial direction of the support ring.
[0015] Optionally, the clamping block includes a first clamping part and a second clamping part, the first clamping part and the second clamping part clamp the second spring, a screw is provided between the first clamping part and the second clamping part, the screw is rotatably connected to the first clamping part, and the screw is threadedly connected to the second clamping part.
[0016] Optionally, a check groove is provided on the support ring, and a locking groove is provided on the clamping block relative to the check groove. A locking block is slidably connected to the inside of the locking groove. An elastic member is vertically provided on the side of the locking block facing away from the support ring. A check body is formed between two adjacent check grooves. One side of the check body is a vertically provided first check surface, and the other side of the check body is an inclined second check surface. The locking block is provided with a third check surface parallel to the first check surface, and the locking block is provided with a fourth check surface parallel to the second check surface.
[0017] In summary, this application includes at least one of the following beneficial technical effects:
[0018] 1. A first spring and a second spring are provided on a tubular fixed bed reactor, wherein the first spring is located in the rapid cooling section of the tubular fixed bed reactor. Since the first spring contains an inert medium, as the reaction proceeds, sublimated metal elements are easily deposited on the surface of the inert medium along with the high-temperature steam, causing bed blockage and increasing pressure drop, thereby causing the first spring to become stuck inside the tubular fixed bed reactor and be removed. A reduced diameter section is provided between the first spring and the second spring, wherein the top end of the reduced diameter section is fixedly connected to the first spring, and the bottom end of the reduced diameter section is fixedly connected to the second spring, and the second spring extends from the bottom end of the tubular fixed bed reactor. Thus, by pulling the second spring, the first spring can be driven through the reduced diameter section to be removed from the interior of the tubular fixed bed reactor. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the overall structure of a spring structure, a tube array including the spring structure, and a disassembly tool thereof in an embodiment of the present application.
[0020] Figure 2 This is a cross-sectional view of a spring structure, a tube array including the spring structure, and a disassembly tool thereof in an embodiment of the present application.
[0021] Figure 3 This is a structural schematic diagram of a spring structure, a tube array including the spring structure, and a first spring and a second spring of a disassembly tool thereof in an embodiment of the present application.
[0022] Figure 4 This is a structural schematic diagram of a spring structure, a tube array including the spring structure, and a screw position of a disassembly tool thereof in an embodiment of the present application.
[0023] Figure 5 This is a structural schematic diagram of a spring structure, a tube array including the spring structure, and a locking block of a disassembly tool thereof in an embodiment of the present application.
[0024] Figure 6This is a schematic diagram of a spring structure, a tube array including the spring structure, and a disassembly tool thereof in an embodiment of the present application.
[0025] Explanation of the accompanying drawings: 1. Integrated elastic part; 11. First spring; 12. Second spring; 13. Reduced diameter section; 2. Shell and tube fixed bed reactor; 21. Shell and tube; 3. Support ring; 31. Check groove; 32. Check body; 321. First check surface; 322. Second check surface; 4. Clamping block; 41. First clamping part; 42. Second clamping part; 43. Screw; 44. Locking groove; 45. Locking block; 451. Third check surface; 452. Fourth check surface. DETAILED DESCRIPTION
[0026] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.
[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.
[0028] In the process of propylene oxidation to acrolein, Bi2O3-MoO3 catalysts offer the highest activity and selectivity. These catalysts consist of octahedral molybdate ions [MoO6] with Mo=O bonds. However, when MoO3 comes into contact with propylene at 300-500°C, it readily combines with the high-temperature steam and sublimes as MoO3-nH2O, causing a decrease in catalyst activity. This means that from the perspective of the catalyst components themselves, there is a loss of active components due to sublimation.
[0029] The reactor for propylene oxidation to produce acrolein is typically a three-tube-sheet fixed-bed reactor. Catalysts of varying activity are loaded from the inlet to the outlet of the reactor tubes, with a single support spring at the bottom. The three tube sheets are the upper, middle, and lower tube sheets. The middle tube sheet, located in the lower middle portion of the reactor, divides the reactor into two independent compartments: the upper reaction zone and the lower cooling zone. This separates the reactor from the upper reaction zone and prevents the product from further oxidation and forming byproducts. The temperature difference between the reaction and cooling zones is 80-110°C. This relatively large temperature difference can easily lead to the deposition of high-boiling-point organic components in the reaction products at the interface between the reaction and cooling zones. These high-boiling-point organic components are highly viscous and slow-moving, creating a "seed effect" that hinders the flow of material and the loss of active components within the tubes. This leads to a continuous increase in the bed pressure drop, increasing the overall energy consumption of the unit, gradually degrading the catalyst's reactivity, and significantly shortening its service life, seriously impacting the catalyst's long-term stable operation.
[0030] Regarding the above-mentioned related technologies, the inventors believe that it is difficult to eliminate the metal impurities accumulated on one side of the catalyst by using traditional burning methods. If physical methods are used for local decoking, traditional catalysts generally have springs installed inside the tubes when loading. However, when coking occurs inside the tubes, the internal springs are difficult to remove for cleaning or replacement, which makes subsequent operations difficult.
[0031] In order to facilitate the removal of the spring located inside the tube, reduce the subsequent cleaning or replacement of the spring, and reduce the difficulty of subsequent operations, the present application provides a spring structure, a tube including the spring structure, and a disassembly tool thereof.
[0032] The following is combined with Figure 1-6 This application is described in further detail.
[0033] The embodiment of the present application discloses a spring structure. Figure 1 、 Figure 2 A spring structure includes an integrated elastic member 1 located inside a shell-and-tube fixed-bed reactor 2. The integrated elastic member 1 is a deformable structure, so that the integrated elastic member 1 can be adaptively changed according to the internal structure of the shell-and-tube fixed-bed reactor 2.
[0034] By locating the integrated elastic member 1 inside the shell-and-tube fixed-bed reactor 2, the coking in the reaction section and the quenching section of the shell-and-tube fixed-bed reactor 2 can be effectively controlled, thereby suppressing the continuous increase in the pressure drop of the catalyst bed and facilitating the subsequent rapid cleaning of the coking area. At the same time, the use of the spring combination improves the utilization rate of the catalyst, extends the catalyst replacement cycle, and optimizes the process operating conditions of the production device.
[0035] The integrated elastic member 1 includes a first spring 11 positioned within the tubular fixed-bed reactor 2. The first spring 11 is coaxially arranged with the tubular fixed-bed reactor 2, and a second spring 12 is disposed at the bottom end of the first spring 11. The first spring 11 and the second spring 12 are tubular in shape and have the same diameter. A reduced diameter section 13 is disposed between the first and second springs 11, 12, securing the connection. The first and second springs 11, 12 have the same outer shape as the tubular fixed-bed reactor 2, with the first spring 11 being smaller than the first spring 11.
[0036] Reference Figure 2 、 Figure 3 The reduced diameter section 13 is a spiral structure, and the rotation direction of the reduced diameter section 13 is the same as that of the first spring 11 and the second spring 12. The top of the reduced diameter section 13 is coaxial with and fixedly connected to the first spring 11, and the top spiral line of the reduced diameter section 13 is connected to the bottom spiral line of the first spring 11. The bottom of the reduced diameter section 13 is coaxial with and fixedly connected to the second spring 12, and the bottom spiral line of the reduced diameter section 13 is connected to the top spiral line of the second spring 12.
[0037] The outer diameter of the reduced diameter section 13 gradually increases from the center to the ends, and the diameter at the location where the top end of the reduced diameter section 13 connects to the first spring 11 is the same as the diameter at the location where the bottom end of the first spring 11 connects to the reduced diameter section 13. The diameter at the location where the bottom end of the reduced diameter section 13 connects to the second spring 12 is the same as the diameter at the location where the top end of the second spring 12 connects to the reduced diameter section 13.
[0038] The distance between the minimum diameter position of the reduced diameter section 13 and the bottom end of the first spring 11 is the same as the distance between the minimum diameter position of the reduced diameter section 13 and the top end of the second spring 12. The minimum diameter of the reduced diameter section 13 is greater than 0, so that the inner diameter of the reduced diameter section 13 at the minimum diameter position can leave space, so that the interior of the first spring 11 and the interior of the second spring 12 are relatively connected, facilitating the flow of the medium inside the shell-and-tube fixed bed reactor 2.
[0039] The pitch of the first spring 11 is the same as the pitch of the second spring 12 , and the pitch of the reduced diameter section 13 is smaller than the pitch of the first spring 11 .
[0040] The outer structure of the integrated elastic member 1 is adapted to the internal structure of the tubular fixed bed reactor 2. In some embodiments, the internal structure of the tubular fixed bed reactor 2 is a tubular columnar structure, and the integrated elastic member 1 is a cylindrical structure adapted thereto.
[0041] The diameter of the first spring 11 is no greater than the inner diameter of the shell-and-tube fixed-bed reactor 2. In some embodiments, the diameter of the first spring 11 is 0.8-1 times the inner diameter of the shell-and-tube fixed-bed reactor 2. The diameter of the second spring 12 is greater than the inner diameter of the shell-and-tube fixed-bed reactor 2, and the second spring 12 supports the first spring 11. The second spring 12 is located outside the bottom end of the shell-and-tube fixed-bed reactor 2 and is clamped to the bottom sidewall of the shell-and-tube fixed-bed reactor 2 via a reduced diameter section 13 located above the second spring 12.
[0042] The second spring 12 supports the reduced diameter section 13 and the first spring 11 located above, and the second spring 12 is located outside the shell-and-tube fixed bed reactor 2, which makes it easy for the operator to dismantle the entire spring structure through the second spring 12, thereby reducing the difficulty in removing the first spring 11 due to coking inside the shell-and-tube fixed bed reactor 2.
[0043] In some embodiments, a third spring is further provided at the top of the first spring 11. The diameter of the third spring is the same as that of the first spring 11, and the third spring is located inside the shell and tube fixed bed reactor 2. The third spring is located at the junction of the reaction section and the rapid cooling section in the shell and tube 21 type reactor.
[0044] The third spring ensures that the reaction products pass through the catalyst bed quickly and efficiently. By changing the flow pattern of the airflow, it blocks the accumulated heat and obstructs the original flow path of the airflow, causing a temporary redistribution of the airflow, which can reduce the residence time and reduce the accumulation of lost components at the bottom of the catalyst.
[0045] First spring 11 is disposed within the quenching zone of tubular fixed-bed reactor 2 and contains an inert medium. In some embodiments, the inert medium may be porcelain balls and / or magnetic rings. As the reaction proceeds, sublimated catalyst components tend to deposit on the surface of the inert medium along with the high-temperature steam, causing the bed pressure drop to continuously increase. However, placing the inert medium within first spring 11 allows for easy replacement without affecting the catalyst bed, significantly optimizing the operating process.
[0046] The present application also discloses a tube-in-tube fixed-bed reactor. The tube-in-tube 21 includes the above-mentioned spring structure arranged inside the tube-in-tube 21. The first spring 11 is arranged inside the tube-in-tube 21, and the reduced diameter section 13 is located at the bottom end of the first spring 11. The lower part of the reduced diameter section 13 is clamped on the bottom end wall of the tube-in-tube 21, and the second spring 12 is located on the outside of the tube-in-tube 21, and the second spring 12 is used to support the first spring 11.
[0047] Reference Figure 4The present application also discloses a disassembly tool, which is applied to the spring structure inside the aforementioned shell-and-tube fixed-bed reactor 2. The first spring 11 is located in the quenching section of the shell-and-tube fixed-bed reactor 2. Since the first spring 11 contains an inert medium, as the reaction continues, the sublimated metal elements are easily deposited on the surface of the inert medium along with the high-temperature steam, causing bed blockage and a continuous increase in pressure drop, causing the first spring 11 to become stuck inside the shell-and-tube fixed-bed reactor 2 and be removed. The disassembly tool is thus clamped on the second spring 12. By rotating the disassembly tool, the disassembly tool drives the second spring 12, the reduced diameter section 13 located on the second spring 12, and the first spring 11 located at the top of the reduced diameter section 13 to rotate synchronously, thereby rotating the first spring 11 out of the interior of the shell-and-tube fixed-bed reactor 21.
[0048] Reference Figure 5 、 Figure 6 The disassembly tool includes a support ring 3 coaxially arranged with the second spring 12. The diameter of the support ring 3 is larger than the diameter of the second spring 12, and two clamping blocks 4 are relatively arranged inside the support ring 3. The two clamping blocks 4 are arranged along the radial direction of the support ring 3, and by relatively arranging the two clamping blocks 4, the second spring 12 can be clamped at the opposite sides at the same time, thereby facilitating the simultaneous application of force to the second spring 12 and reducing the tensile deformation of the second spring 12 caused by unilateral force.
[0049] The clamping block 4 includes a first clamping portion 41 and a second clamping portion 42 which are arranged opposite to each other. The first clamping portion 41 and the second clamping portion 42 are respectively located on both sides of the clamped position of the second spring 12, and the first clamping portion 41 is provided with a groove adapted to the clamped position of the second spring 12 on one side close to the second clamping portion 42, and the second clamping portion 42 is provided with a groove adapted to the clamped position of the second spring 12 on one side close to the first clamping portion, and when the first clamping portion 41 and the second clamping portion 42 clamp the second spring 12, the clamped position of the second spring 12 can be located inside the two grooves, and the first clamping portion 41 and the second clamping portion 42 clamp the second spring 12 to limit the second spring 12.
[0050] A screw 43 is horizontally disposed on the first clamping portion 41. The end of the screw 43 extends into the interior of the second clamping portion 42. One end of the screw 43 is rotationally connected to the first clamping portion 41, and the other end of the screw 43 is threadedly connected to the second clamping portion 42. By rotating the screw 43, the screw 43 drives the opposing second clamping portion 42 toward or away from the first clamping portion 41. When the second spring 12 needs to be clamped and fixed by the first and second clamping portions 41, the screw 43 is rotated to move the second clamping portion 42 toward the side closer to the first clamping portion 41, thereby clamping and fixing the second spring 12 at the clamped position between the first and second clamping portions 41, 42. When the second spring 12 needs to be released, the screw 43 is rotated in the opposite direction, causing the screw 43 to move the second clamping portion 42 toward the side away from the first clamping portion 41, thereby releasing the second spring 12 from the inside of the two grooves at the clamped position.
[0051] The side wall of the support ring 3 passes through the interior of the first clamping portion 41 , and the support ring 3 is slidably connected to the first clamping portion 41 , so that the clamping block 4 can move on the support ring 3 along the circumference of the support ring 3 .
[0052] The outer wall of the support ring 3 is provided with a check groove 31. The check grooves 31 are arranged adjacent to each other along the circumference of the support ring 3. Two adjacent check grooves 31 form a check body 32 between the support ring 3. One side of the check body 32 is a vertical plane, which forms a first check surface 321. The other side of the check body 32 is an inclined plane, which forms a second check surface 322. The second check surface 322 is arranged to be inclined gradually toward the side closer to the first check surface 321 from the side near the center of the support ring 3 to the side near the circumference of the support ring 3.
[0053] A locking groove 44 is vertically opened inside the first clamping portion 41 at a position relative to the support ring 3, a locking block 45 is slidably connected inside the locking groove 44, and a return spring is vertically provided on the side of the locking groove 44 where the locking block 45 faces away from the support ring 3, one end of the return spring abuts against one side of the first clamping portion 41, and the other end of the return spring abuts against the locking block 45.
[0054] The locking block 45 has a third check surface 451 on its side near the support ring 3. The third check surface 451 is arranged parallel to the first check surface 321. The locking block 45 also has a fourth check surface 452 on its side near the support ring 3. The fourth check surface 452 is arranged parallel to the second check surface 322. The first check surface 321 abuts against the third check surface 451, and the second check surface 322 abuts against the fourth check surface 452.
[0055] When the clamping block 4 rotates forward on the support ring 3, the first check surface 321 and the third check surface 451 are engaged. Since the first check surface 321 and the third check surface 451 are vertically arranged, the clamping block 4 and the support ring 3 are stuck, so that the clamping block 4 drives the support ring 3 to rotate synchronously, and then drives the second spring 12 clamped with the support ring 3 to rotate, and then drives the first spring 11 to be rotated out from the inside of the tube 21 through the second spring 12.
[0056] When the clamping block 4 rotates in the opposite direction on the support ring 3 , the second check surface 322 and the fourth check surface 452 abut and slide against each other, pushing the locking block 45 to move toward the side away from the support ring 3 , so that the support ring 3 can rotate inside the first clamping block 4 .
[0057] In this application, the term "plurality" refers to at least two or more than two, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.
[0058] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Claims
1. A spring structure, characterized in that: The invention comprises an integrated elastic member (1) located inside a tubular fixed bed reactor (2), wherein the integrated elastic member (1) comprises a first spring (11) and a second spring (12) arranged opposite to each other, a diameter-reducing section (13) is provided between the first spring (11) and the second spring (12), the diameter-reducing section (13) is fixedly connected to the first spring (11), and the other end of the diameter-reducing section (13) is fixedly connected to the second spring (12), the second spring (12) extends from the bottom end of the tubular fixed bed reactor (2), and the interior of the first spring (11) is filled with an inert medium.
2. The spring structure according to claim 1, wherein: The diameter of the first spring (11) is not greater than the inner diameter of the shell-and-tube fixed-bed reactor (2), and the diameter of the second spring (12) is not less than the inner diameter of the shell-and-tube fixed-bed reactor (2).
3. The spring structure according to claim 2, wherein: The outer diameter of the first spring (11) is 0.8-1 times the inner diameter of the tubular fixed bed reactor (2).
4. The spring structure according to claim 1, wherein: The diameter of the reduced diameter section (13) gradually increases from the center position toward the two end positions, the diameter at the connection position of the reduced diameter section (13) and the first spring (11) is the same as the bottom end diameter of the first spring (11), and the diameter at the connection position of the reduced diameter section (13) and the second spring (12) is the same as the top end diameter of the second spring (12).
5. The spring structure according to claim 1, wherein: The pitch of the first spring (11) is the same as the pitch of the second spring (12), and the pitch of the reduced diameter section (13) is smaller than the pitch of the first spring (11).
6. A tube array (21), comprising the spring structure according to any one of claims 1 to 5, arranged in a tube-in-tube fixed bed reactor (2).
7. A disassembly tool, applied to the spring structure according to any one of claims 1 to 5, for disassembling the first spring (11) from the interior of the tubular fixed bed reactor (2), comprising a support ring (3), a clamping block (4) provided inside the support ring (3), and the clamping block (4) connected to the second spring (12).
8. The disassembly tool according to claim 7, characterized in that: Two clamping blocks (4) are arranged opposite to each other, and a connecting line between the two clamping blocks (4) is arranged along the radial direction of the support ring (3).
9. The disassembly tool according to claim 7, characterized in that: The clamping block (4) includes a first clamping portion (41) and a second clamping portion (42), wherein the first clamping portion (41) and the second clamping portion (42) clamp the second spring (12), and a screw (43) is provided between the first clamping portion (41) and the second clamping portion (42), wherein the screw (43) is rotatably connected to the first clamping portion (41), and the screw (43) is threadedly connected to the second clamping portion (42).
10. The disassembly tool according to claim 7, characterized in that: A non-return groove (31) is provided on the support ring (3), and a locking groove (44) is provided on the clamping block (4) relative to the non-return groove (31). A locking block (45) is slidably connected inside the locking groove (44). An elastic member is vertically provided on the side of the locking block (45) away from the support ring (3). A non-return body (32) is formed between two adjacent non-return grooves (31). One side of the non-return body (32) is a vertically provided first non-return surface (321), and the other side of the non-return body (32) is an inclined second non-return surface (322). The locking block (45) is provided with a third non-return surface (451) parallel to the first non-return surface (321), and the locking block (45) is provided with a fourth non-return surface (452) parallel to the second non-return surface (322).