Mechanical seal leakage-free device for kettle of polycarbosilane production line
By using a leak-free device consisting of a mechanical seal sleeve, sleeve nut and O-ring in the production of polycarbosilane, the problem of sealing point leakage is solved, production continuity and product quality are guaranteed, and troubleshooting is simplified.
Patent Information
- Application Number
- CN202423242793.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-27
AI Technical Summary
During the production of polycarbosilane, the sealing point between the mechanical seal sleeve and the agitator shaft is prone to leakage, causing the lubricating fluid to contaminate the material, affecting product quality, and the leakage cannot be handled in time when the mechanical seal fails.
The leak-free device consists of a mechanical seal sleeve, sleeve nut, first and second O-rings, and a boss flange. It forms a channel seal through close fit and is equipped with an oil sensor and an oil collection tank to detect and deal with leaks in a timely manner.
It effectively avoids leakage at the sealing point, ensures production continuity and product quality, simplifies the troubleshooting process, and avoids contamination by lubricating fluid entering the mixing tank.
Smart Images
Figure CN223483422U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of polycarbosilane processing technology, and in particular to a leak-free mechanical seal device for a polycarbosilane production line. Background Art
[0002] In the production of polycarbosilane, the operating conditions of the stirring tanks in each related process are demanding. Under high temperature and high pressure conditions, the reliability of the mechanical seal is directly related to the safety of equipment production and the assurance of product quality.
[0003] The existing mechanical seal bushing and the agitator shaft are prone to leakage at the sealing point. Because the upper end face of the mechanical seal bushing is flat, when the cover is pressed at the shaft seal, the sealing ring is squeezed to both sides under pressure, and the adhesion to the outer circumference of the agitator shaft is insufficient, which cannot support the pressure inside the vessel and leads to external leakage. In addition, when the mechanical seal fails and leaks, the lubricating fluid will flow into the vessel from the bottom of the mechanical seal, contaminating the material and affecting product quality. Utility Model Content
[0004] The purpose of this invention is to provide a leak-free mechanical seal device for a polycarbosilane production line to solve the problems mentioned in the background art.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a leak-free mechanical seal device for a polycarbosilane production line. This leak-free mechanical seal device is installed at the stirring shaft of the mixing vessel. Its structure includes a mechanical seal bushing, a bushing nut, and a second O-ring. A first O-ring is provided between the mechanical seal bushing and the bushing nut. The first and second O-rings are tightly fitted with the outer circumferential surface of the stirring shaft to form a channel seal. A tightening bolt is threaded onto one side of the bushing nut to tighten the stirring shaft. A boss flange is provided on the lower side of the mechanical seal bushing. A boss mating groove is provided at the bottom of the mechanical seal bushing. A boss that matches the boss mating groove is provided on the boss flange. An oil collection groove is opened on the boss flange. A discharge port connected to the oil collection groove is provided on one side of the boss flange. A tee pipe is provided at the discharge port, and an oil sensor is connected to the upper end of the tee pipe.
[0006] Preferably, the top of the mechanical seal bushing is provided with a bushing tapered groove.
[0007] Preferably, a needle valve is connected to the side port of the three-way pipe.
[0008] Preferably, the mechanical seal bushing, bushing nut, and boss flange are respectively fitted onto the outside of the stirring shaft.
[0009] Preferably, a sealing housing is provided on the outside of the mechanical seal bushing, and a sealing housing cover is provided on top of the sealing housing. The sealing housing and the sealing housing cover are detachably connected by a first bolt. A bearing cover is provided on top of the sealing housing cover, and the bearing cover and the sealing housing cover are detachably connected by a second bolt.
[0010] Preferably, the bottom of the sealing housing is detachably connected to the boss flange by fastening bolts.
[0011] Preferably, a cooling water inlet is provided on one side of the sealed housing, and a cooling water outlet is provided on the other side of the sealed housing.
[0012] Preferably, a sealing gasket is also connected between the sealed housing and the sealed housing cover.
[0013] Preferably, a bearing is connected between the bearing cover and the sealing housing cover, and a skeleton oil seal is connected above the bearing.
[0014] Preferably, the middle part of the sealing box is provided with an upper stationary ring, an upper moving ring and an upper push ring in sequence from top to bottom, and the lower middle part of the sealing box is provided with a lower push ring, a lower moving ring and a lower stationary ring in sequence from top to bottom, and a spring seat is provided above the lower push ring.
[0015] As can be seen from the above description of the structure of this utility model, compared with the prior art, this utility model has the following advantages:
[0016] This utility model provides a leak-free mechanical seal device for a polycarbosilane production line. The device consists of a mechanical seal bushing, bushing nut, first O-ring, second O-ring, and flange, all working together to prevent leakage. The design of this leak-free device allows for timely fault detection, preventing leakage of sealing fluid into the mixing vessel due to mechanical seal failure, thus avoiding product quality issues. Furthermore, it prevents leakage at the bushing sealing point under dynamic operating conditions, enabling simple and timely temporary handling and ensuring continuous production. Attached Figure Description
[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:
[0018] Figure 1 This is an exploded view of a leak-free mechanical seal device for a polycarbosilane production line according to this utility model.
[0019] Figure 2 This is a schematic diagram of the structure of a leak-free mechanical seal device for a polycarbosilane production line according to the present invention. DETAILED DESCRIPTION
[0020] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.
[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0024] Example
[0025] refer to Figure 1 and Figure 2A leak-proof mechanical seal device for a polycarbosilane production line is disclosed. This device is installed at the stirring shaft 4 of the stirred tank. Its structure includes a mechanical seal sleeve 1, a sleeve nut 2, and a second O-ring 32. An O-ring groove for assembling the second O-ring 32 is formed 10mm above the bottom of the boss mating groove 11. A first O-ring 31 is provided between the mechanical seal sleeve 1 and the sleeve nut 2. Both the first O-ring 31 and the second O-ring 32 are made of perfluoroether. The first O-ring 31 and the second O-ring 32 are tightly fitted to the outer circumferential surface of the stirring shaft 4 to form a channel seal. A threaded connection is provided on one side of the sleeve nut 2 to tighten the stirring shaft 4. The mechanical seal bushing 1 has a tightening bolt 5, a boss flange 6 on its lower side, a boss mating groove 11 at the bottom of the mechanical seal bushing 1, a boss 61 on the boss flange 6 that matches the boss mating groove 11, an oil collection groove 810 on the boss flange 6, a discharge port connected to the oil collection groove 810 on one side of the boss flange 6, a three-way pipe 7 at the discharge port, and an oil sensor 71 connected to the upper end of the three-way pipe 7; a bushing tapered groove 1a on the top of the mechanical seal bushing 1; a needle valve 72 connected to the side end of the three-way pipe 7; the mechanical seal bushing 1, bushing nut 2, and boss flange 6 are respectively fitted on the outside of the stirring shaft 4. This structure, through the installation of a mechanical seal bushing 1, bushing nut 2, first O-ring 31, second O-ring 32, and boss flange 6, constitutes a leak-free mechanical seal device. The design of this leak-free mechanical seal device can detect faults in a timely manner, preventing the sealing fluid from leaking into the mixing tank due to mechanical seal failure and affecting product quality. It can also prevent leakage at the bushing sealing point under dynamic operating conditions of the mechanical seal, allowing for simple and timely temporary treatment and ensuring the continuity of production.
[0026] A sealing housing 81 is provided on the outer side of the mechanical seal bushing 1. A sealing housing cover 82 is provided on top of the sealing housing 81, and the sealing housing 81 and the sealing housing cover 82 are detachably connected by a first bolt 83. A bearing cover 84 is provided on top of the sealing housing cover 82, and the bearing cover 84 and the sealing housing cover 82 are detachably connected by a second bolt 85. The bottom of the sealing housing 81 is detachably connected to the boss flange 6 by a fastening bolt 86. A cooling water inlet 81a is provided on one side of the sealing housing 81. A cooling water outlet 81b is provided on one side; a sealing gasket 87 is also connected between the sealing housing 81 and the sealing housing cover 82; a bearing 88 is also connected between the bearing cover 84 and the sealing housing cover 82, and a skeleton oil seal 89 is connected above the bearing 88; an upper stationary ring 811, an upper moving ring 812 and an upper push ring 813 are arranged sequentially from top to bottom in the middle part of the sealing housing 81, and a lower push ring 814, a lower moving ring 815 and a lower stationary ring 816 are arranged sequentially from top to bottom in the lower middle part of the sealing housing 81, and a spring seat 817 is also provided above the lower push ring 814.
[0027] In practical use:
[0028] After the mechanical seal is assembled and pressure tested and passes the test, it is put into use. If leakage occurs between the mechanical seal bushing 1 and the shaft seal, it indicates that the second O-ring 32 seal has failed and the seal at the conical groove 1a of the bushing is also leaking. Operation can be suspended, the top bolt 5 on the bushing nut 2 is loosened, and then the bushing nut 2 is tightened to increase the tightening force between the first O-ring 31 and the conical groove 1a of the bushing, thus achieving a sealing effect. Then the top bolt 5 is tightened again to ensure the normal operation of the production batch. The operation is simple and convenient.
[0029] If the mechanical seal fails, the mechanical seal lubricant will leak from the bottom of the sealing housing 81 to the oil collection tank 810 and the drain port of the flange 6. The oil sensor 71 installed at the drain port of the oil collection tank 810 will sound an alarm after contacting the mechanical seal lubricant, allowing production personnel to detect and handle the problem in a timely manner. In addition, the flange 61 of the flange 6 has a certain height, which can also prevent the mechanical seal lubricant from flowing into the mixing tank, thus saving time for the continuous completion of the production process and preventing the mechanical seal lubricant from flowing into the mixing tank, causing product contamination and affecting quality.
[0030] When a faulty disassembly and repair is required, the mechanical seal lubricant that has leaked into the oil collection tank 810 is first discharged through the needle valve 72 before the mechanical seal is removed, which can prevent the mechanical seal lubricant from dripping during the disassembly process.
[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A leak-proof mechanical seal device for a polycarbosilane production line, wherein the leak-proof mechanical seal device is installed at the stirring shaft of the stirred tank, characterized in that: Its structure includes a mechanical seal bushing, a bushing nut, and a second O-ring. A first O-ring is provided between the mechanical seal bushing and the bushing nut. The first and second O-rings are tightly fitted with the outer circumferential surface of the stirring shaft to form a channel seal. A tightening bolt for pressing the stirring shaft is threaded onto one side of the bushing nut. A boss flange is provided on the lower side of the mechanical seal bushing. A boss mating groove is provided at the bottom of the mechanical seal bushing. A boss that matches the boss mating groove is provided on the boss flange. An oil collection groove is provided on the boss flange. A discharge port connected to the oil collection groove is provided on one side of the boss flange. A tee pipe is provided at the discharge port. An oil sensor is connected to the upper end of the tee pipe.
2. The leak-free mechanical seal device for a polycarbosilane production line according to claim 1, characterized in that: The top of the mechanical seal bushing is provided with a bushing tapered groove.
3. The leak-free mechanical seal device for a polycarbosilane production line according to claim 1, characterized in that: A needle valve is connected to the side port of the three-way pipe.
4. The leak-free mechanical seal device for a polycarbosilane production line according to claim 1, characterized in that: The mechanical seal bushing, bushing nut, and boss flange are respectively fitted onto the outside of the stirring shaft.
5. The leak-free mechanical seal device for a polycarbosilane production line according to claim 1, characterized in that: A sealing housing is provided on the outside of the mechanical seal bushing, and a sealing housing cover is provided on top of the sealing housing. The sealing housing and the sealing housing cover are detachably connected by a first bolt. A bearing cover is provided on top of the sealing housing cover, and the bearing cover and the sealing housing cover are detachably connected by a second bolt.
6. The leak-free mechanical seal device for a polycarbosilane production line according to claim 5, characterized in that: The bottom of the sealed housing is detachably connected to the flange by fastening bolts.
7. The leak-free mechanical seal device for a polycarbosilane production line according to claim 5, characterized in that: A cooling water inlet is provided on one side of the sealed enclosure, and a cooling water outlet is provided on the other side of the sealed enclosure.
8. A leak-free mechanical seal device for a polycarbosilane production line according to claim 5, characterized in that: A sealing gasket is also connected between the sealed box body and the sealed box body cover.
9. A leak-free mechanical seal device for a polycarbosilane production line according to claim 5, characterized in that: A bearing is also connected between the bearing cover and the sealing housing cover, and a skeleton oil seal is connected above the bearing.
10. A leak-free mechanical seal device for a polycarbosilane production line according to claim 5, characterized in that: The middle part of the sealed box is provided with an upper stationary ring, an upper moving ring and an upper push ring in sequence from top to bottom. The lower middle part of the sealed box is provided with a lower push ring, a lower moving ring and a lower stationary ring in sequence from top to bottom. A spring seat is provided above the lower push ring.