Mechanical sealing device
By setting up a mechanical sealing device between the thermal cracking reactor and the sealing buffer silo, especially the micro-adjustment and active adjustment of the sealing module, the problem of insufficient sealing is solved, and efficient sealing effect and equipment life are achieved.
Patent Information
- Application Number
- CN202422066235.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-23
AI Technical Summary
In the prior art, the sealing property between the thermal cracking reactor and the front and rear structures is insufficient, resulting in high-temperature oil steam leakage and poor sealing property.
Mechanical sealing device is adopted, including a micro-adjustment sealing module and an active-adjustment sealing module. The cylinder is automatically tensioned to ensure the sealing between the thermal cracking reactor and the sealing buffer silo.
It effectively prevents high-temperature oil steam leakage, improves sealing, reduces friction power consumption, extends the service life of the equipment, and is suitable for a variety of complex working conditions.
Smart Images
Figure CN223089990U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of sealing equipment, and particularly relates to a mechanical seal device. Background Art
[0002] With the rapid development of China's economy and the general improvement of people's living standards, automobiles have gradually entered people's daily lives, resulting in a large number of waste tires. The accumulation of a large number of waste tires not only occupies land, but also is extremely likely to cause fires and environmental pollution. Recycling waste tires can not only relieve the environmental pressure, reduce pollution, but also effectively recycle resources. Waste tire pyrolysis is a relatively popular method for treating waste tires at present. Waste tire pyrolysis can pyrolyze waste tires into tire oil, carbon black, steel wire and combustible gas. Waste tire pyrolysis refers to an irreversible thermochemical reaction in an anaerobic or hypoxic atmosphere, using high temperature to pyrolyze the organic matter in waste tires, releasing volatile products and forming solid coke. Gas, liquid and solid products can be formed during the incomplete thermal degradation process. Using this method, waste tires can be completely pyrolyzed into useful products such as pyrolysis oil, pyrolysis carbon black and pyrolysis non-condensable gas.
[0003] The pyrolysis reactor is a key device for pyrolyzing waste tires. It provides a high-temperature and high-pressure environment for the pyrolysis reaction. Therefore, the sealing performance between the pyrolysis reactor and the front and rear structures is of great significance during the process of pyrolyzing waste tires. Summary of the Utility Model
[0004] The details of one or more embodiments of the utility model are set forth in the following drawings and description, so that other features, objects and advantages of the present application will become more comprehensible.
[0005] The utility model provides a mechanical seal device, which solves the technical problem of the sealing performance between the pyrolysis reactor and the front and rear structures, and has the characteristic of good sealing performance.
[0006] The utility model discloses a mechanical seal device, which is hermetically connected between an externally rotating pyrolysis reactor and a sealed buffer bin; the mechanical seal device includes a micro-adjustment seal module and an active adjustment seal module;
[0007] The micro-adjustment seal module includes a first bellows compensator, a first elastic member, and a cylinder; the first bellows compensator is sleeved outside the cylinder body of the pyrolysis reactor, and one end of the first bellows compensator is fixedly connected to the cylinder body of the pyrolysis reactor; the first elastic member is arranged outside the first bellows compensator and is connected to both ends of the first bellows compensator; the cylinder is connected to one end of the first elastic member;
[0008] The active adjustment sealing module includes a second corrugated compensator and a second elastic member; the second corrugated compensator is sleeved outside the cylinder body of the pyrolysis reactor, and one end of the second corrugated compensator is fixedly connected to the sealing buffer bin; the other end of the second corrugated compensator is hermetically connected to the other end of the first corrugated compensator through a dynamic and static seal; the second elastic member is arranged outside the second corrugated compensator, and both ends are connected to both ends of the second corrugated compensator;
[0009] The air cylinder compresses the first elastic member to a first position where the dynamic and static seals are hermetically connected.
[0010] In some embodiments, the dynamic and static seal includes a friction moving ring fixedly connected to the other end of the first corrugated compensator, a friction static ring fixedly connected to the other end of the second corrugated compensator, and a graphite ring arranged between the friction moving ring and the friction static ring and fixedly connected to the friction static ring, and the graphite ring is rotatably connected to the friction moving ring.
[0011] In some embodiments, the first elastic member includes a first spring, the left and right ends of the first spring are fixed by first spring fixing seats, and the first spring fixing seat close to the dynamic and static seal is fixedly connected to the friction moving ring, and the push rod of the air cylinder pushes the first spring fixing seat far from the dynamic and static seal to compress the first elastic member to the first position where the friction moving ring abuts against the graphite ring.
[0012] In some embodiments, the second elastic member includes a second spring, a spring fixing rod, and a second spring fixing seat; one second spring fixing seat is fixedly connected to the friction static ring, and the other second spring fixing seat is fixedly connected to one end of the second corrugated compensator; both ends of the spring fixing rod are fixedly connected to the second spring fixing seats on both sides, and the second spring is sleeved outside the spring fixing rod.
[0013] In some embodiments, the second elastic member further includes: prestressed nuts and pre-tightening nuts arranged at both ends of the second spring; the prestressed nuts are arranged at one end of the second spring far from the dynamic and static seal.
[0014] In some embodiments, the second elastic member further includes a prestressed retaining ring arranged between the prestressed nut and the second spring.
[0015] In some embodiments, flanges are provided at both ends of the first corrugated compensator and the second corrugated compensator.
[0016] In some embodiments, one end flange of the first corrugated compensator is fixedly connected to the flange of the cylinder body of the pyrolysis reactor.
[0017] In some of these embodiments, several of the first elastic members, the cylinder, and the second elastic member are respectively evenly distributed circumferentially along the cylinder of the pyrolysis reactor.
[0018] In some of these embodiments, inner ring dust-proof baffle rings are provided between the first bellows compensator and the cylinder of the pyrolysis reactor, between the second bellows compensator and the cylinder of the pyrolysis reactor, and between the second bellows compensator and the sealed buffer bin.
[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0020] The present utility model provides a mechanical seal device. By providing a micro-adjustment seal module and an active adjustment seal module, when the active adjustment seal module fails to adjust properly, the micro-adjustment seal module intervenes and is automatically tensioned by the cylinder on the micro-adjustment module assembly, preventing high-temperature oil vapor leakage in the pyrolysis reactor and ensuring the sealing performance at the dynamic and static joint between the outer-rotating pyrolysis reactor and the sealed buffer bin. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:
[0022] Figure 1 is a cross-sectional schematic view of the mechanical seal device provided by an embodiment of the present utility model;
[0023] Figure 2 is a structural schematic view of the mechanical seal device provided by an embodiment of the present utility model;
[0024] Figure 3 is another structural schematic view of the mechanical seal device provided by an embodiment of the present utility model;
[0025] In the above figures: 1, pyrolysis reactor; 2, sealed buffer bin; 31, micro-adjustment seal module; 3101, first bellows compensator; 3102, first spring; 3103, cylinder; 32, active adjustment seal module; 3201, second bellows compensator; 3202, second spring; 3203, prestressed retaining ring; 3301, friction dynamic ring; 3302, graphite ring; 3303, friction static ring; 34, inner ring dust-proof baffle ring. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be described and explained below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. Based on the embodiments provided by the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present utility model.
[0027] An embodiment of the present utility model provides a mechanical seal device. Figures 1-3 For the structural schematic diagram and sectional schematic diagram of the mechanical seal device according to the embodiment of the present utility model. Refer to Figures 1-3 As shown, the mechanical seal device is sealingly connected between the externally rotating pyrolysis reactor 1 and the sealed buffer silo 2; the mechanical seal device includes a micro-adjustment seal module 31 and an active adjustment seal module 32; the micro-adjustment seal module 31 includes a first corrugated compensator 3101, a first elastic member, and a cylinder 3103; the first corrugated compensator 3101 is sleeved outside the cylinder body of the pyrolysis reactor 1, and one end of the first corrugated compensator 3101 is fixedly connected to the cylinder body of the pyrolysis reactor 1; the first elastic member is arranged outside the first corrugated compensator 3101, and both ends are connected to both ends of the first corrugated compensator 3101; the cylinder 3103 is connected to one end of the first elastic member; the active adjustment seal module 32 includes a second corrugated compensator 3201 and a second elastic member; the second corrugated compensator 3201 is sleeved outside the cylinder body of the pyrolysis reactor 1, and one end of the second corrugated compensator 3201 is fixedly connected to the sealed buffer silo 2; the other end of the second corrugated compensator 3201 is sealingly connected to the other end of the first corrugated compensator 3101 through a static and dynamic seal; the second elastic member is arranged outside the second corrugated compensator 3201, and both ends are connected to both ends of the second corrugated compensator 3201; the cylinder 3103 compresses the first elastic member to the first position where the static and dynamic seals are sealingly connected. In order to further ensure the sealing effect, a plurality of first elastic members, cylinders 3103 and second elastic members are respectively evenly distributed along the circumferential direction of the cylinder body of the pyrolysis reactor 1.
[0028] By setting the micro-adjustment seal module 31 and the active adjustment seal module 32 in the above mechanical seal device, when the active adjustment seal module 32 fails to adjust properly, the micro-adjustment seal module 31 intervenes and is automatically tensioned by the cylinder 3103 on the micro-adjustment module assembly, preventing high-temperature oil vapor in the pyrolysis reactor 1 from leaking and ensuring the sealing performance at the static-dynamic joint between the externally rotating pyrolysis reactor 1 and the sealed buffer silo 2.
[0029] For the convenience of connection and disassembly, flange plates are provided at both ends of the first corrugated compensator 3101 and the second corrugated compensator 3201. One flange plate of the first corrugated compensator 3101 is fixedly connected to the flange plate of the cylinder body of the pyrolysis reactor 1.
[0030] Further, the dynamic and static seal includes a friction dynamic ring 3301 fixedly connected to the other end of the first corrugated compensator 3101, a friction static ring 3303 fixedly connected to the other end of the second corrugated compensator 3201, and a graphite ring 3302 disposed between the friction dynamic ring 3301 and the friction static ring 3303 and fixedly connected to the friction static ring 3303. The graphite ring 3302 is rotatably connected to the friction dynamic ring 3301.
[0031] In some embodiments, the first elastic member includes a first spring 3102. The left and right ends of the first spring 3102 are fixed by the first spring 3102 fixing seats, and the first spring 3102 fixing seat close to the dynamic and static seal is fixedly connected to the friction dynamic ring 3301. The push rod of the cylinder 3103 pushes the first spring 3102 fixing seat far from the dynamic and static seal, thereby compressing the first elastic member to the first position where the friction dynamic ring 3301 abuts against the graphite ring 3302.
[0032] In some embodiments, the second elastic member includes a second spring 3202, a spring fixing rod, and a second spring 3202 fixing seat; one second spring 3202 fixing seat is fixedly connected to the friction static ring 3303, and the other second spring 3202 fixing seat is fixedly connected to one end of the second corrugated compensator 3201; both ends of the spring fixing rod are fixedly connected to the second spring 3202 fixing seats on both sides, and the second spring 3202 is sleeved outside the spring fixing rod. Further, the second elastic member further includes: prestressed nuts and pre-tightening nuts provided at both ends of the second spring 3202; the prestressed nuts are provided at the end of the second spring 3202 far from the dynamic and static seal. The second elastic member further includes a prestressed retaining ring 3203 provided between the prestressed nut and the second spring 3202.
[0033] In order to prevent the carbon slag in the sealed buffer bin 2 from returning to the mechanical seal assembly and affecting the effect of the two-way adjustment mechanical seal, an inner ring dust-proof baffle 34 is provided between the first corrugated compensator 3101 and the cylinder body of the pyrolysis reactor 1, between the second corrugated compensator 3201 and the cylinder body of the pyrolysis reactor 1, and between the second corrugated compensator 3201 and the sealed buffer bin 2.
[0034] After the waste rubber and plastic are crushed into the particle size required for pyrolysis, they are input into the feed buffer bin by the conveying device for standby. The pyrolysis reactor 1 is the core component of pyrolysis. Generally, it adopts an external rotation working mode. Fixed bins with front and rear seals are respectively arranged at the feed end and the slag discharge end. In order to ensure that the high-temperature oil vapor in the pyrolysis reactor 1 does not leak out, dynamic and static fitting seal devices, that is, the above-mentioned mechanical seal devices, are respectively arranged at the feed end and the slag discharge end.
[0035] In addition, the feed end and the discharge end of the thermal cracking reactor 1 are respectively provided with a thermal cracking reactor 1 belt assembly, and the support wheel assembly cooperates with the belt assembly to support the thermal cracking reactor 1 for operation. A docking flange is reserved on the outside of the right discharge end cylinder of the thermal cracking reactor 1, which is connected to the left fixed flange of the fine-tuning sealing corrugated compensator in the two-way adjustment mechanical seal assembly (mechanical seal device). The two-way adjustment mechanical seal assembly (mechanical seal device) is provided with an active sealing right flange connected to the docking flange of the sealing buffer storage bin.
[0036] The sealed buffer silo 2 can buffer the carbon slag and oil vapor after the thermal cracking is completed. An emergency safety drain valve is vertically arranged in the middle of the silo top of the sealed buffer silo 2. A temperature remote sensor is vertically arranged on the left side of the silo top of the sealed buffer silo 2. A pressure remote sensor is vertically arranged on the right side of the silo top of the sealed buffer silo 2. An oil vapor outlet is arranged on the upper right side of the silo body of the sealed buffer silo 2, and a slag discharge port is arranged at the bottom of the sealed buffer silo 2.
[0037] The above-mentioned bidirectional adjustable mechanical seal assembly is divided into two modules, the left side is the fine-adjustment seal module 31, and the right side is the active adjustment seal module 32. When the active adjustment seal module 32 is not adjusted into place, the fine-adjustment seal module 31 intervenes and automatically tightens through the cylinder 3103 on the fine-adjustment module assembly to prevent leakage of high-temperature oil vapor in the thermal cracking reactor 1.
[0038] The left side is composed of a fine-tuning sealing module 31, and a total of 6 groups of fine-tuning tensioning cylinders 3103 are provided, which are docked and fixed with the mounting position set on the fine-tuning tensioning cylinder 3103 mounting seat. A total of 6 groups of fine-tuning tensioning cylinder 3103 mounting seats are arranged equidistantly along the left fixed flange of the fine-tuning sealing bellows compensator (first bellows compensator 3101). The fine-tuning tensioning cylinder 3103 mounting seat is provided with a circular hole through which the push rod of the fine-tuning tensioning cylinder 3103 can pass, and the push rod of the fine-tuning tensioning cylinder 3103 pushes the left spring seat of the fine-tuning tensioning. The left side of the fine-tuning tensioning spring (first spring 3102) is fixed on the left spring seat of the fine-tuning tensioning, and the right side of the fine-tuning tensioning cylinder 3103 is fixed on the right spring seat of the fine-tuning tensioning cylinder 3103. When the push rod of the fine-tuning tensioning cylinder 3103 pushes the first spring 3102 to compress, its force pushes the spring seat on the right side of the fine-tuning tensioning cylinder 3103, acting on the friction seal dynamic ring, making it contact with the tension seal graphite ring 3302, and the two fit together to always maintain a sealed state. The fine-tuning seal corrugated compensator is equipped with 3 waves and 2 wheels. Because it is a flexible structure, it can be expanded and contracted with the fine-tuning tensioning spring. The left fixed flange of the fine-tuning seal corrugated compensator is connected to the reserved docking flange of the left thermal cracking reactor 1. The right fixed flange of the fine-tuning seal corrugated compensator is connected to the right friction seal dynamic ring.
[0039] On the right side is the structure of the active seal module. In the middle of the friction static ring fixing seat, several hexagon socket head cap screw counterbores are arranged along the circumference. The sealing graphite ring 3302 is also correspondingly arranged relative to the friction static ring fixing seat, and the sealing graphite ring 3302 on the right side can be fixed thereon by hexagon socket head cap screws. A flange hole is arranged on the upper part of the friction static ring fixing seat, and its right side is paired with the left flange of the active seal on the active seal bellows compensator (the second bellows compensator 3201) and is connected and fixed by locking bolts. The active seal bellows compensator is provided with a right flange of the active seal, which is connected to the docking flange of the sealed buffer storage bin. Along the circumference of the outer edge of the left flange of the active seal, 6 groups of left tension spring seats of the active seal are arranged. Along the circumference of the outer edge of the right flange of the active seal, 6 groups of left tension spring seats of the active seal are also arranged in the same way. First, insert the second spring 3202 into the active seal tension spring fixing rod, and then sequentially insert the active seal tension spring adjusting prestress retaining ring 3203 and screw on the active seal tension spring adjusting prestress nut for standby. The left screw rod of the active seal tension spring fixing rod in the active seal pre-tightening assembly is inserted into the left tension spring seat of the active seal, and the left pre-tightening nut of the active seal is screwed on. The right screw rod of the active seal tension spring fixing rod in the active seal pre-tightening assembly is inserted into the right tension spring seat of the active seal, and the right pre-tightening nut of the active seal is screwed on. The left flange of the active seal and the right flange of the active seal arranged on the active seal bellows compensator are pre-tightened. After being installed in place, release the left pre-tightening nut of the active seal, so that it automatically tensions and fits the friction static ring fixing seat and the sealing graphite ring 3302 with the friction seal dynamic ring. The active seal tension spring adjusting prestress nut on the active seal pre-tightening assembly can finely adjust the tension during operation.
[0040] The above-mentioned two-way adjustable mechanical seal is an axial single-sided seal device. This device uses elastic elements to pre-tighten and fix the static ring and the sealing pair at the moving end of the moving ring, and tension and finely adjust the bellows compensator through the right cylinder 3103. The left bit tight spring prestress automatically tensions, and the intermediate pressure and the elastic element pressure are squeezed to achieve sealing. Compared with the traditional packing seal, it has great advantages:
[0041] Specifically:
[0042] 1. Good sealing performance: The two-way adjustable mechanical seal can effectively prevent the leakage of high-temperature oil vapor during the pyrolysis process and the entry of external air during the micro-negative pressure operation. Its advantages are better than other types of sealing methods, such as the single-way adjustable mechanical seal, packing seal, etc.;
[0043] 2. Long service life: The design and service life of the two-way adjustable mechanical seal are usually very long, and it can work continuously and stably under various complex working conditions;
[0044] 3. Low frictional power: Compared with packing seals, the two-way adjustable mechanical seal consumes less frictional power, which helps reduce energy consumption and extend the service life of the equipment.
[0045] 4. Compact structure: The two-way adjustable mechanical seal has a compact structure design and is suitable for applications with limited space.
[0046] 5. Wide application range: The two-way adjustable mechanical seal is applicable to a variety of working environments, including high temperature, low temperature, high pressure, high rotational speed, and strong corrosion conditions.
[0047] 6. Low maintenance requirements: Once properly installed and adjusted, the two-way adjustable mechanical seal generally does not require frequent adjustment or maintenance during operation, reducing the labor intensity of the operator.
[0048] The working process of the above mechanical seal device is as follows:
[0049] First, the active adjustment seal module 32 is used for seal adjustment. When the active adjustment seal module 32 cannot be adjusted in place, the micro-adjustment seal module 31 intervenes and is automatically tensioned through the cylinder 3103 on the micro-adjustment module assembly to prevent the leakage of high-temperature oil vapor in the thermal cracking reactor 1.
[0050] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.
[0051] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent should be subject to the appended claims.
Claims
1. A mechanical seal device, characterized in that, The mechanical seal device is sealingly connected between the externally rotating pyrolysis reactor and the sealed buffer bin; the mechanical seal device includes a micro-adjustment seal module and an active adjustment seal module; The micro-adjustment seal module includes: A first corrugated compensator, the first corrugated compensator is sleeved outside the cylinder body of the pyrolysis reactor, and one end of the first corrugated compensator is fixedly connected to the cylinder body of the pyrolysis reactor; A first elastic member, the first elastic member is arranged outside the first corrugated compensator, and both ends are connected to both ends of the first corrugated compensator; A cylinder, the cylinder is connected to one end of the first elastic member; The active adjustment seal module includes: A second corrugated compensator, the second corrugated compensator is sleeved outside the cylinder body of the pyrolysis reactor, and one end of the second corrugated compensator is fixedly connected to the sealed buffer bin; the other end of the second corrugated compensator is sealingly connected to the other end of the first corrugated compensator through a dynamic and static seal; A second elastic member, the second elastic member is arranged outside the second corrugated compensator, and both ends are connected to both ends of the second corrugated compensator; The cylinder compresses the first elastic member to a first position where the dynamic and static seals are sealingly connected.
2. The mechanical seal device according to claim 1, characterized in that, The dynamic and static seal includes a friction moving ring fixedly connected to the other end of the first corrugated compensator, a friction static ring fixedly connected to the other end of the second corrugated compensator, and a graphite ring arranged between the friction moving ring and the friction static ring and fixedly connected to the friction static ring, and the graphite ring is rotatably connected to the friction moving ring.
3. The mechanical seal device according to claim 2, wherein, The first elastic member includes a first spring, the left and right ends of the first spring are fixed by first spring fixing seats, and the first spring fixing seat close to the dynamic and static seal is fixedly connected to the friction moving ring, and the push rod of the cylinder pushes the first spring fixing seat far from the dynamic and static seal to compress the first elastic member to the first position where the friction moving ring abuts against the graphite ring.
4. The mechanical seal device according to claim 2, characterized in that, The second elastic member includes a second spring, a spring fixing rod, and second spring fixing seats; one of the second spring fixing seats is fixedly connected to the friction static ring, and the other second spring fixing seat is fixedly connected to one end of the second corrugated compensator; both ends of the spring fixing rod are fixedly connected to the second spring fixing seats on both sides, and the second spring is sleeved outside the spring fixing rod.
5. The mechanical seal device according to claim 4, wherein The second elastic member further includes: prestressed nuts and pre-tightening nuts arranged at both ends of the second spring; the prestressed nuts are arranged at the end of the second spring far from the dynamic and static seal.
6. The mechanical seal device according to claim 5, characterized in that, The second elastic member further includes a prestressed retaining ring arranged between the prestressed nut and the second spring.
7. The mechanical seal device according to claim 1, wherein Flange plates are provided at both ends of the first corrugated compensator and the second corrugated compensator.
8. The mechanical seal device according to claim 7, characterized in that, One end flange plate of the first corrugated compensator is fixedly connected to the flange plate of the cylinder body of the pyrolysis reactor.
9. The mechanical seal device according to claim 1, characterized in that, A plurality of the first elastic members, the cylinders and the second elastic members are evenly distributed along the circumferential direction of the cylinder body of the pyrolysis reactor.
10. The mechanical seal device according to claim 1, characterized in that, An inner ring dust-proof baffle is provided between the first bellows compensator and the cylinder body of the pyrolysis reactor, between the second bellows compensator and the cylinder body of the pyrolysis reactor, and between the second bellows compensator and the sealed buffer silo.