Mechanical sealing device for reaction kettle and stirring shaft and reaction kettle

Abstract

The utility model relates to a mechanical sealing device for a reaction kettle and a stirring shaft and the reaction kettle, the mechanical sealing device comprises a sealing containing part, a first flange, a cooling circulation assembly, a cover body and a monitoring supply part, the inner side of the annular bottom plate is connected with one end of the sealing component, the outer side of the annular bottom plate is connected with the baffle to form a lubricating oil containing groove, the annular bottom plate, the cooling circulation assembly, the first flange and the reaction kettle inlet flange are sequentially connected, and one end of the cover is connected with the end, away from the annular bottom plate, of the baffle, so that the lubricating oil containing groove forms a closed container. The splashing lubricating liquid flows back to the lubricating oil containing groove along the inner surface of the cover body, when the liquid level is low to the alarm liquid level, the lubricating liquid is supplied to the lubricating oil containing groove, the cooling circulation assembly is connected with the first flange and the annular bottom plate, and when the temperature, conducted to the lubricating oil containing groove, of the high temperature in the reaction kettle exceeds 80 DEG C, cooling water circulates and cools in the cooling circulation assembly. The service life of the sealing part is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical seal, in particular to a mechanical seal device for a reaction kettle and a stirring shaft. BACKGROUND

[0002] The main reason for mechanical seal between the reaction kettle and the stirring shaft is to prevent medium leakage and ensure production safety. The polyurethane waterproof coating reaction kettle requires high vacuum degree, and generally adopts double-end mechanical seal or single-end mechanical seal. The cost of double-end mechanical seal is relatively high. In order to reduce the cost, single-end mechanical seal can be used. The lubrication of single-end mechanical seal needs to immerse the sealing surface in the lubricating liquid. If the temperature in the kettle is high, it will be conducted to the mechanical seal.

[0003] The stirring shaft rotates at high speed during stirring, and the linear speed on the end face of the mechanical seal structure can reach more than 3.7 m / s. The linear speed of the mechanical seal structure used in the reaction kettle is generally less than or equal to 2 m / s. Dry grinding of the end face of the mechanical seal structure will greatly shorten the service life of the sealing ring. Therefore, the lubricating liquid level needs to be managed. The liquid level in the traditional lubricating oil tank is not easy to observe during operation, and the safety risk is high. If the lubricating oil is not added in time, dry grinding will occur between the mechanical seal structure and the stirring shaft, which will damage the mechanical seal structure. In addition, the traditional lubricating oil tank is designed as an open design. The dynamic ring part rotating at high speed will throw the lubricating liquid out of the oil tank, which will splash and contaminate the site environment. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the above technical problems, the present application provides a mechanical seal device for a reaction kettle and a stirring shaft, which can monitor the liquid level of the lubricating liquid oil tank in real time, so that the staff can timely supplement the lubricating liquid, and also can avoid the lubricating liquid from splashing everywhere.

[0005] The mechanical seal device for a reaction kettle and a stirring shaft provided by the present application comprises: a sealing containing part, which comprises a sealing part, an annular bottom plate and a baffle, one end of the sealing part is connected with the inner side of the annular bottom plate, one end of the baffle is connected with the outer side of the bottom plate, and a lubricating oil containing groove is formed; a first flange connected with the inlet flange of the reaction kettle; a cooling circulating assembly connected with the annular bottom plate and the first flange respectively; a cover body connected with one end of the baffle away from the annular bottom plate; a monitoring and supplementing part connected with the baffle and communicated with the lubricating oil containing groove; and a stirring shaft extending into the inside of the reaction kettle through the cover body, the sealing part, the annular bottom plate, the cooling circulating assembly and the first flange.

[0006] In some optional embodiments, the cover body comprises a plurality of split cover blocks, and the plurality of split cover blocks are arranged in sequence in the circumferential direction of the stirring shaft, and any two adjacent split cover blocks are connected.

[0007] In some optional embodiments, the cover further comprises a sealing strip, and the sealing strip is arranged between any two adjacent cover blocks.

[0008] In some optional embodiments, at least one of any two adjacent cover blocks is provided with a receiving groove on the side facing the other cover block, and the sealing strip is arranged in the receiving groove.

[0009] In some optional embodiments, the cover block comprises a first arc-shaped cover block, a first arc-shaped extension plate, a second arc-shaped cover block and a second arc-shaped extension plate, the first arc-shaped cover block and the second arc-shaped cover block are arranged in parallel, the first arc-shaped extension plate and the second arc-shaped extension plate are arranged in parallel, an outer side of the first arc-shaped cover block is connected to one end of the first arc-shaped extension plate, the other end of the first arc-shaped extension plate is connected to an outer side plate of the second arc-shaped cover block, and one end of the second arc-shaped extension plate is connected to an inner side of the second arc-shaped cover block.

[0010] In some optional embodiments, the monitoring and replenishing component comprises a visible cup, a conveying pipe and a liquid level monitoring component, the conveying pipe is connected to the visible cup and the baffle respectively, the conveying pipe is in communication with the lubricating oil receiving groove, and the liquid level monitoring component monitors the liquid level of the lubricating liquid inside the visible cup.

[0011] In some optional embodiments, the liquid level monitoring component comprises a liquid level sensor, a controller and an alarm component, the controller is electrically connected to the liquid level sensor and the alarm component respectively, and the liquid level sensor is arranged inside the visible cup.

[0012] In some optional embodiments, the cooling circulating assembly comprises a cooling sleeve, a cooling water receiving body, a power element, an inflow pipe and an outflow pipe, the cooling sleeve has a cooling space inside, the cooling sleeve is in communication with the annular bottom plate and the first flange respectively, the inflow pipe and the outflow pipe are connected to the cooling sleeve and the cooling water receiving body respectively, and the power element is arranged in the inflow pipe.

[0013] In some optional embodiments, the cooling sleeve comprises a first cooling sleeve and a second cooling sleeve, the first cooling sleeve and the second cooling sleeve are concentric, the diameter of the first cooling sleeve is greater than the diameter of the second cooling sleeve, and the first cooling sleeve and the second cooling sleeve are connected to the annular bottom plate and the first flange respectively.

[0014] In another aspect, the application provides a reaction kettle, which comprises the mechanical sealing device of the reaction kettle and the stirring shaft mentioned in any one of the above.

[0015] The application has at least the following technical effects compared with the prior art:

[0016] The application provides a mechanical sealing device for a reaction kettle and a stirring shaft, which comprises a sealing accommodating component, a first flange, a cooling circulation assembly, a cover body and a monitoring and supplementing component. The sealing accommodating component comprises a sealing component, an annular bottom plate and a baffle. One end of the sealing component is connected to the inner side of the annular bottom plate, and one end of the baffle is connected to the outer side of the bottom plate to form a lubricating oil accommodating groove. The cooling circulation assembly is connected to the annular bottom plate and the first flange respectively. The first flange is connected to the inlet flange of the reaction kettle. One end of the stirring shaft extends to the inside of the reaction kettle through the cover body, the sealing component, the annular bottom plate, the cooling circulation assembly and the first flange. One end of the cover body is connected to the end of the baffle away from the annular bottom plate, so that the lubricating oil accommodating groove forms a closed container. The splashed lubricating liquid flows back to the lubricating oil accommodating groove along the inner surface of the cover body, thereby avoiding the pollution of the environment by the splashed oil. The monitoring and supplementing component is used for monitoring the liquid level in the lubricating oil accommodating groove. When the liquid level is lower than the alarm liquid level, the lubricating liquid is supplemented into the lubricating oil accommodating groove, thereby avoiding the dry grinding of the sealing component, reducing the personnel inspection burden and improving the reliability. The cooling circulation assembly is connected to the first flange and the annular bottom plate. When the temperature of the high-temperature conduction in the reaction kettle exceeds 80 DEG C, the cooling water can be circulated and cooled in the inside of the cooling circulation assembly, thereby avoiding the reduction of the service life of the sealing component caused by high temperature. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 FIG. 1 is an assembly structure schematic diagram of the mechanical sealing device for the reaction kettle and the stirring shaft provided by the application;

[0018] Fig. 2 FIG. 2 is an assembly schematic diagram of the cooling circulation assembly provided by the application;

[0019] Fig. 3 FIG. 3 is a structure schematic diagram of the cover body provided by the application;

[0020] Fig. 4 FIG. 4 is a structure schematic diagram of the split cover block provided by the application.

[0021] Mark explanation: 1-sealing accommodating component; 11-sealing component; 111-stationary ring; 112-driving seat; 113-rotary ring; 114-bellows; 115-spring; 12-annular bottom plate; 121-third groove; 122-fourth groove; 13-baffle; 2-first flange; 21-first groove; 22-second groove; 3-cooling circulation assembly; 31-first cooling water jacket; 32-second cooling water jacket; 4-cover body; 41-split cover block; 411-accommodating groove; 412-first arc-shaped split cover; 413-first arc-shaped extension plate; 414-second arc-shaped split cover; 415-second arc-shaped extension plate; 42-sealing strip; 5-monitoring and supplementing component; 51-visible cup body; 52-delivery pipe; 53-liquid level sensor; a-stirring shaft. DETAILED DESCRIPTION

[0022] In order to enable the above-mentioned purposes, features and advantages of the present application to be more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0023] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can be practiced in other ways different from those described herein, and therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0024] The main reason for the mechanical seal between the reaction kettle and the stirring shaft is to prevent medium leakage and ensure production safety. The polyurethane waterproof coating reaction kettle requires high vacuum degree, and generally adopts double-end mechanical seal or single-end mechanical seal. The cost of double-end mechanical seal is higher, in order to reduce the cost, single-end mechanical seal can be used. The lubrication of single-end mechanical seal needs to soak the sealing surface in the lubricating liquid, and if the temperature in the kettle is high, it will be conducted to the mechanical seal.

[0025] The stirring shaft a has high speed during stirring, and the linear speed on the end face of the mechanical seal structure can reach more than 3.7 m / s. The linear speed of the mechanical seal structure used in the reaction kettle is generally ≤2 m / s. The dry grinding of the end face of the mechanical seal structure will greatly shorten the service life of the sealing ring. Therefore, the lubricating liquid level needs to be managed. The liquid level in the traditional lubricating oil tank is not easy to observe during operation, and the safety risk is large. If the lubricating oil is not added in time, dry grinding will occur between the mechanical seal structure and the stirring shaft a, which will damage the mechanical seal structure. Moreover, the traditional lubricating oil tank is designed as an open type, and the dynamic ring part rotating at high speed will throw the lubricating liquid out of the oil tank, which will splash and contaminate the site environment.

[0026] In order to solve the above technical problems, the present application provides a mechanical seal device for reaction kettle and stirring shaft, which can monitor the liquid level of the lubricating liquid oil tank in real time, so as to fill the lubricating liquid in time, and also can avoid the splashing of the lubricating liquid everywhere.

[0027] The following will be described in detail with reference to the accompanying drawings Figs. 1-4 The mechanical seal device for reaction kettle and stirring shaft will be described in detail.

[0028] The application provides a mechanical sealing device for a reaction kettle and a stirring shaft, which comprises a sealing accommodating component 1, a first flange 2, a cooling circulation assembly 3, a cover body 4 and a monitoring and supplementing component 5. The sealing accommodating component 1 comprises a sealing component 11, an annular bottom plate 12 and a baffle plate 13. One end of the sealing component 11 is connected to the inner side of the annular bottom plate 12, and one end of the baffle plate 13 is connected to the outer side of the annular bottom plate 12 to form a lubricating oil accommodating groove. The first flange 2 is connected to the inlet flange of the reaction kettle. The cooling circulation assembly 3 is connected to the annular bottom plate 12 and the first flange 2, respectively. One end of the cover body 4 is connected to the end of the baffle plate 13 away from the annular bottom plate 12. The monitoring and supplementing component 5 is connected to the baffle plate 13 and communicates with the lubricating oil accommodating groove. One end of the stirring shaft a extends into the interior of the reaction kettle through the cover body 4, the sealing component 11, the annular bottom plate 12, the cooling circulation assembly 3 and the first flange 2.

[0029] Specifically, the mechanical sealing device for the reaction kettle and the stirring shaft comprises the sealing accommodating component 1, the first flange 2, the cooling circulation assembly 3, the cover body 4 and the monitoring and supplementing component 5. The sealing accommodating component 1 comprises the sealing component 11, the annular bottom plate 12 and the baffle plate 13. The inner side of the annular bottom plate 12 is connected to one end of the sealing component 11, and the outer side of the annular bottom plate 12 is connected to one end of the baffle plate 13 to form the lubricating oil accommodating groove. The cooling circulation assembly 3 is connected to the annular bottom plate 12 and the first flange 2, respectively. The first flange 2 is connected to the inlet flange of the reaction kettle. One end of the stirring shaft extends into the interior of the reaction kettle through the cover body 4, the sealing component 11, the annular bottom plate 12, the cooling circulation assembly 3 and the first flange 2. One end of the cover body 4 is connected to the end of the baffle plate 13 away from the annular bottom plate 12, so that the lubricating oil accommodating groove forms a closed container. The splashed lubricating liquid flows back to the lubricating oil accommodating groove along the inner surface of the cover body 4, avoiding the pollution of the environment by the splashed oil. The monitoring and supplementing component 5 is used for monitoring the liquid level in the lubricating oil accommodating groove. When the liquid level is lower than the alarm liquid level, the lubricating liquid is supplemented into the interior of the lubricating oil accommodating groove, avoiding the dry grinding of the sealing component 11, reducing the personnel inspection burden and improving the reliability. The cooling circulation assembly 3 is connected to the first flange 2 and the annular bottom plate 12. When the temperature of the high-temperature conduction in the reaction kettle to the lubricating oil accommodating groove exceeds 80℃, the cooling water can be circulated and cooled in the interior of the cooling circulation assembly 3, avoiding the reduction of the service life of the sealing component 11 caused by high temperature.

[0030] Further, the sealing component 11 comprises a static sealing component and a dynamic sealing component, the static sealing component has a static ring 111 coaxially arranged with the stirring shaft a and sealingly embedded in the annular bottom plate 12, the dynamic sealing component has a transmission seat 112 positioned and sealingly sleeved outside the stirring shaft a, a rotating ring 113 sleeved outside the stirring shaft a and between the transmission seat 112 and the first flange 2, and a bellows 114 made of rubber material and fixedly connected between the transmission seat 112 and the rotating ring 113 in an interference fit manner, and the rotating ring 113 also abuts against and can rotate relative to the static ring 111, and the outer wall of the bellows 114 is also positioned and installed with a spring 115 for sealing compensation of the bellows 114.

[0031] The sealing principle of the mechanical sealing device of the reaction kettle and the stirring shaft is that when the stirring shaft a rotates, the transmission seat 112 rotates synchronously with the stirring shaft a, and the rotation of the transmission seat 112 drives the bellows 114 and the rotating ring 113 to rotate, so that the relative friction between the rotating ring 113 and the static ring 111 generates sealing, and in combination with the sealing connection formed between the static sealing assembly and the first flange 2 and the sealing connection formed between the dynamic sealing component and the stirring shaft a, the sealing connection between the first flange 2 and the stirring shaft a can be ensured.

[0032] In some optional embodiments, the cover body 4 comprises a plurality of split cover blocks 41, and the plurality of split cover blocks 41 are arranged in sequence in the circumferential direction of the stirring shaft a, and any two adjacent split cover blocks 41 are connected.

[0033] Specifically, the split cover block 41 is in a cylindrical shape, and the plurality of split cover blocks 41 are arranged in sequence in the circumferential direction of the stirring shaft a to form a cylindrical structure, the stirring shaft a is arranged inside the cylindrical structure, one end of the cylindrical structure is inserted into the end of the baffle plate 13 away from the annular bottom plate 12, so that the lubricating oil containing groove forms a closed container, and the splashed lubricating oil flows back to the lubricating oil containing groove along the inner surface of the cover body 4, avoiding the pollution of the splashed oil to the environment.

[0034] In some optional embodiments, the cover body 4 further comprises a sealing strip 42, and the sealing strip 42 is arranged between any two adjacent split cover blocks 41.

[0035] Specifically, the plurality of split cover blocks 41 are arranged in sequence in the circumferential direction of the stirring shaft a to form a cylindrical structure, and the sealing strip 42 is arranged between any two adjacent split cover blocks 41, so as to avoid liquid leakage between any two adjacent split cover blocks 41.

[0036] Optionally, the cover body 4 comprises two cover body blocks 41, which are connected to form a cylindrical structure. The two cover body blocks 41 are in contact with each other through the sealing strips 42 on both sides of one cover body block 41, so as to avoid liquid leakage between any two adjacent cover body blocks 41. The stirring shaft a is arranged in the cylindrical structure, and one end of the cylindrical structure is inserted into the baffle 13 away from the annular bottom plate 12, so that the lubricating oil containing groove forms a closed container. The splashed lubricating oil flows back to the lubricating oil containing groove along the inner surface of the cover body 4, thereby avoiding environmental pollution caused by splashed oil.

[0037] In some optional embodiments, at least one of any two adjacent cover body blocks 41 is provided with a containing groove 411 on the side facing the other cover body block 41, and the sealing strip 42 is arranged in the containing groove 411.

[0038] Specifically, the plurality of cover body blocks 41 are arranged in the circumferential direction of the stirring shaft a to form a cylindrical structure. The stirring shaft a is arranged in the cylindrical structure. At least one of any two adjacent cover body blocks 41 is provided with a containing groove 411 on the side facing the other cover body block 41, and the sealing strip 42 is arranged in the containing groove 411. The sealing strip 42 arranged in the containing groove 411 can avoid liquid leakage between any two adjacent cover body blocks 41.

[0039] In some optional embodiments, the cover body block 41 comprises a first arc-shaped cover body 412, a first arc-shaped extension plate 413, a second arc-shaped cover body 414, and a second arc-shaped extension plate 415. The first arc-shaped cover body 412 and the second arc-shaped cover body 414 are arranged in parallel. The first arc-shaped extension plate 413 and the second arc-shaped extension plate 415 are arranged in parallel. The outer side of the first arc-shaped cover body 412 is connected to one end of the first arc-shaped extension plate 413. The other end of the first arc-shaped extension plate 413 is connected to the outer side plate of the second arc-shaped cover body 414. One end of the second arc-shaped extension plate 415 is connected to the inner side of the second arc-shaped cover body 414.

[0040] Specifically, the first arc-shaped cover bodies 412 of the plurality of cover body blocks 41 form a ring-shaped plate. The first arc-shaped extension plates 413 of the plurality of cover body blocks 41 form a cylindrical structure. The second arc-shaped cover bodies 414 of the plurality of cover body blocks 41 form a ring-shaped plate. The second arc-shaped extension plates 415 of the plurality of cover body blocks 41 form a cylindrical structure. One end of the cylindrical structure formed by the second arc-shaped extension plates 415 of the plurality of cover body blocks 41 is inserted into the baffle 13 away from the annular bottom plate 12. Optionally, the cylindrical structure formed by the plurality of second arc-shaped extension plates 415 is threadedly connected to the baffle 13, or the cylindrical structure formed by the plurality of second arc-shaped extension plates 415 is welded to the baffle 13.

[0041] In some optional embodiments, the monitoring replenishment component 5 comprises a visible cup 51, a conveying pipe 52 and a liquid level monitoring component, the conveying pipe 52 is connected to the visible cup 51 and the baffle 13 respectively, the conveying pipe 52 is in communication with the lubricating oil containing groove, and the liquid level monitoring component monitors the liquid level of the lubricating liquid in the visible cup 51. The liquid level monitoring component comprises a liquid level sensor 53, a controller and an alarm component, the controller is electrically connected to the liquid level sensor 53 and the alarm component respectively, and the liquid level sensor 53 is arranged in the interior of the visible cup 51.

[0042] Specifically, the visible cup 51 is a transparent cup, the visible cup 51 is provided with a scale line, and the worker can see the current scale of the lubricating liquid through the visible cup 51. The conveying pipe 52 is connected to the visible cup 51 and the baffle 13 respectively, so that the visible cup 51 is in communication with the lubricating oil containing groove, according to the principle of communicating vessels, the liquid level of the lubricating liquid in the interior of the lubricating oil containing groove can be directly observed through the transparent cup. The liquid level sensor 53 is arranged in the interior of the visible cup 51, the liquid level sensor 53 can monitor the liquid level of the lubricating liquid in the interior of the visible cup 51, and the liquid level information of the lubricating liquid in the interior of the visible cup 51 is transmitted to the controller. The controller is electrically connected to the alarm component, and the alarm component is an alarm zero and an alarm lamp. When the liquid level information of the lubricating liquid in the interior of the visible cup 51 is lower than a preset value, the controller sends an instruction to the alarm zero and the alarm lamp, the alarm zero and the alarm lamp remind the worker to supplement the lubricating liquid in the interior of the visible cup 51, and the lubricating liquid in the interior of the visible cup 51 flows to the interior of the lubricating oil containing groove through the conveying pipe 52.

[0043] In some optional embodiments, the cooling circulating assembly 3 comprises a cooling sleeve, a cooling water containing body, a power element, an inflow pipe and an outflow pipe, the cooling sleeve has a cooling space in the interior, the cooling sleeve is in communication with the annular bottom plate 12 and the first flange 2 respectively, the inflow pipe and the outflow pipe are connected to the cooling sleeve and the cooling water containing body respectively, and the power element is arranged in the inflow pipe.

[0044] Specifically, the cooling sleeve has a cooling space in the interior, the inflow pipe is connected to the cooling sleeve and the cooling water containing body, the outflow pipe is connected to the cooling sleeve and the cooling water containing body, the power element is a liquid pump, the liquid pump pressurizes the cooling liquid in the interior of the cooling water containing body and sends the cooling liquid to the interior of the cooling sleeve, and the cooling water in the interior of the cooling sleeve flows back to the cooling water containing body through the outflow pipe. The cooling water takes away part of the heat in the flowing process, and further cools the cooling water.

[0045] In some optional embodiments, the cooling sleeve comprises a first cooling water sleeve 31 and a second cooling water sleeve 32, the first cooling water sleeve 31 and the second cooling water sleeve 32 are concentric, the diameter of the first cooling water sleeve 31 is greater than that of the second cooling water sleeve 32, and the first cooling water sleeve 31 and the second cooling water sleeve 32 are connected to the annular bottom plate 12 and the first flange 2 respectively.

[0046] Specifically, the first flange 2 is provided with a first groove 21, the annular bottom plate 12 is provided with a third groove 121, the first groove 21 and the third groove 121 are correspondingly arranged, and the first cooling water jacket 31 is clamped in the first groove 21 and the third groove 121; the first flange 2 further comprises a second groove 22, the annular bottom plate 12 is provided with a fourth groove 122, the second groove 22 and the fourth groove 122 are correspondingly arranged, and the second cooling water jacket 32 is clamped in the second groove 22 and the fourth groove 122.

[0047] Further, the first groove 21 and the second groove 22 are concentric, the diameter of the first groove 21 is greater than that of the second groove 22, the annular bottom plate 12 is provided with the third groove 121 and the fourth groove 122, the third groove 121 and the fourth groove 122 are concentric, and the diameter of the third groove 121 is greater than that of the fourth groove 122.

[0048] On the other hand, the application provides a reaction kettle, which comprises the mechanical sealing device of the reaction kettle and the stirring shaft provided in any one of the above.

[0049] In the present application, the term "a plurality of" refers to at least two or at least two more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, or detachable connection, or integral connection; "connecting" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "a specific embodiment" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A mechanical seal device for a reaction vessel and a stirring shaft, characterized by, The utility model relates to a kind of reaction kettle, including: Sealing containing component (1), including sealing component (11), annular bottom plate (12) and baffle (13), one end of the sealing component (11) is connected with the inner side of the annular bottom plate (12), one end of the baffle (13) is connected with the outer side of the annular bottom plate (12) to form lubricating liquid containing groove; First flange (2), which is connected with the inlet flange of the reaction kettle; Cooling circulation assembly (3) is connected with the annular bottom plate (12) and the first flange (2) respectively; Cover (4), one end is connected with the end of the baffle (13) away from the annular bottom plate (12); Monitoring and replenishing component (5) is connected with the baffle (13) and communicates with the lubricating oil containing groove; The stirring shaft (a) extends to the inside of the reaction kettle through the cover (4), the sealing component (11), the annular bottom plate (12), the cooling circulation assembly (3) and the first flange (2).

2. The mechanical seal device of the reaction vessel and the stirring shaft according to claim 1, wherein The cover (4) includes a plurality of split cover blocks (41), and the plurality of split cover blocks (41) are arranged in sequence in the circumferential direction of the stirring shaft (a). Any two adjacent split cover blocks (41) are connected.

3. The mechanical seal device of the reaction vessel and the stirring shaft according to claim 2, characterized by, The cover (4) further includes a sealing strip (42) arranged between any two adjacent split cover blocks (41).

4. The mechanical seal device of the reaction vessel and the stirring shaft according to claim 3, wherein At least one of any two adjacent split cover blocks (41) is provided with a containing groove (411) on the side facing the other. The sealing strip (42) is arranged in the containing groove (411).

5. The mechanical seal device of a reaction vessel and a stirring shaft according to claim 4, wherein The split cover block (41) includes a first arc-shaped split (412), a first arc-shaped extension plate (413), a second arc-shaped split (414) and a second arc-shaped extension plate (415). The first arc-shaped split (412) and the second arc-shaped split (414) are arranged in parallel. The first arc-shaped extension plate (413) and the second arc-shaped extension plate (415) are arranged in parallel. The outer side of the first arc-shaped split (412) is connected with one end of the first arc-shaped extension plate (413). The other end of the first arc-shaped extension plate (413) is connected with the outer side plate of the second arc-shaped split (414). One end of the second arc-shaped extension plate (415) is connected with the inner side of the second arc-shaped split (414).

6. The mechanical seal device for a reaction vessel and a stirring shaft according to claim 1, wherein The monitoring and replenishing component (5) includes a visible cup body (51), a delivery pipe (52) and a liquid level monitoring component. The delivery pipe (52) is connected with the visible cup body (51) and the baffle (13) respectively. The delivery pipe (52) communicates with the lubricating oil containing groove. The liquid level monitoring component monitors the liquid level of the lubricating liquid inside the visible cup body (51).

7. The mechanical seal device of a reaction vessel and a stirring shaft according to claim 6, wherein The liquid level monitoring component includes a liquid level sensor (53), a controller and an alarm component. The controller is electrically connected with the liquid level sensor (53) and the alarm component respectively. The liquid level sensor (53) is arranged inside the visible cup body (51).

8. The mechanical seal device of a reaction vessel and a stirring shaft according to claim 1, wherein The cooling circulating assembly (3) comprises a cooling jacket, a cooling water containing body, a power element, an inflow pipe and an outflow pipe, the cooling jacket has a cooling space inside, the cooling jacket is communicated with the annular bottom plate (12) and the first flange (2) respectively, the inflow pipe and the outflow pipe are connected with the cooling jacket and the cooling water containing body respectively, and the power element is arranged on the inflow pipe.

9. The mechanical seal device of a reaction vessel and a stirring shaft according to claim 8, wherein The cooling jacket comprises a first cooling jacket (31) and a second cooling jacket (32), the first cooling jacket (31) and the second cooling jacket (32) are concentric, the diameter of the first cooling jacket (31) is larger than that of the second cooling jacket (32), and the first cooling jacket (31) and the second cooling jacket (32) are connected with the annular bottom plate (12) and the first flange (2) respectively.

10. A reaction vessel, characterized by, The mechanical sealing device comprises the reaction kettle and the stirring shaft.

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