A mechanical seal structure for a stirring shaft of a reaction kettle

Abstract

The utility model discloses a kind of reaction kettle stirring shaft mechanical sealing structures, it includes installation component, sealing assembly and elastic component, the installation component includes water jacket and baffle, the water jacket bottom is used to with reaction kettle top detachably fixed connection, the baffle is arranged in the water jacket, the outer wall of the baffle lower section and the inner wall of the water jacket lower section sealing fixed connection, the outer wall between the baffle upper section and the inner wall of the water jacket upper section forms accommodating space;The sealing assembly includes static ring and dynamic ring, the static ring is arranged in the accommodating space.The beneficial effects of the utility model are: the reaction kettle stirring shaft mechanical sealing structure, baffle upper section is between end face sealing and stirring shaft by forming a circle of isolation zone, can prevent foreign matter into reaction kettle, solved the problem that the debris of reaction kettle operation end face sealing place abrasion is easy to fall into reaction kettle from stirring hole, effectively improves product first-time pass rate, stabilizes product quality, and the price is low.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, and in particular to a mechanical seal structure for a reaction vessel stirring shaft. Background Technology

[0002] In a broad sense, a reaction vessel is a container that carries out physical or chemical reactions. Through structural design and parameter configuration, it achieves the heating, evaporation, cooling, and low-to-high-speed mixing functions required by the process. Reactors are widely used in petroleum, chemical, rubber, pesticide, dye, pharmaceutical, and food industries as pressure vessels to complete processes such as vulcanization, nitration, hydrogenation, hydrocarbonation, polymerization, and condensation.

[0003] The mechanical seal of the reactor's agitator shaft is a key component for ensuring safe production and preventing media leakage and environmental pollution. In actual use, the mechanical seal is located at the top of the reactor. The agitator shaft extends into the reactor after passing through the central hole of the mechanical seal and the agitation hole on the reactor. The moving ring of the mechanical seal holds the agitator shaft tightly. Due to wear on the sealing end face of the mechanical seal, wear debris can fall into the reactor from the agitation hole, affecting product quality. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a mechanical seal structure for the stirring shaft of a reactor, thereby solving the technical problem in the prior art where wear on the sealing end face of the mechanical seal causes wear debris to fall into the reactor through the stirring hole, affecting product quality.

[0005] To achieve the above technical objectives, the present invention provides a mechanical seal structure for a reactor stirring shaft, comprising: The mounting assembly includes a water jacket and a baffle. The bottom of the water jacket is detachably and fixedly connected to the top of the reactor. The baffle is arranged inside the water jacket. The outer wall of the lower section of the baffle is sealed and fixedly connected to the inner wall of the lower section of the water jacket. An accommodating space is formed between the outer wall of the upper section of the baffle and the inner wall of the upper section of the water jacket. A sealing assembly includes a stationary ring and a rotating ring. The stationary ring is disposed within the accommodating space and is detachably and fixedly connected to the water jacket. The lower section of the rotating ring is disposed within the accommodating space, and the upper section of the rotating ring is used to hold the stirring shaft. An elastic component is connected to the rotating ring such that the bottom of the rotating ring abuts against the top of the stationary ring, forming an end-face seal.

[0006] Furthermore, a ring-shaped support platform is formed at the connection between the inner wall of the lower section and the inner wall of the upper section of the water jacket, and the stationary ring rests on the support platform.

[0007] Furthermore, the support platform has a first step and a second step connected in sequence. The first step is close to the center of the water jacket, the second step is close to the inner wall of the water jacket, and the second step is higher than the first step. The stationary ring rests on the first step.

[0008] Furthermore, the installation assembly also includes a top sleeve, the bottom of which is detachably and fixedly connected to the top of the water jacket, the upper section of the moving ring being rotatably connected to the inner wall of the top sleeve, the upper end of the elastic component being connected to the top sleeve, and the lower end of the elastic component being connected to the moving ring.

[0009] Furthermore, the inner wall of the top sleeve is a spherical structure, the outer edge of the top of the moving ring is a spherical structure, and the spherical structure of the outer edge of the top of the moving ring is rotatably connected to the spherical structure of the inner wall of the top sleeve.

[0010] Furthermore, a liquid injection hole is provided on the top sleeve, which is connected to the accommodating space to inject isolation liquid into the accommodating space through the liquid injection hole. A bidirectional spiral groove is provided on the outer wall of the lower section of the moving ring. When the moving ring rotates, the bidirectional spiral groove can drive the isolation liquid to circulate.

[0011] Furthermore, the inner diameter of the lower section of the moving ring is larger than the inner diameter of its upper section, so as to form an inward space on the inner side of its lower section.

[0012] Furthermore, the sealing assembly also includes a pressure ring, which is disposed within the accommodating space and rests on the stationary ring. The pressure ring is also detachably and fixedly connected to the support platform so as to press itself against the stationary ring.

[0013] Furthermore, the sealing assembly also includes a clamp, which is fitted onto the upper section of the rotating ring and tightens the rotating ring so that the upper section of the rotating ring grips the stirring shaft.

[0014] Furthermore, the elastic component includes multiple elastic elements, each of which is distributed in a ring array structure.

[0015] Compared with the prior art, the beneficial effects of this utility model include: In use, the bottom of the water jacket is first detachably and fixedly connected to the top of the reactor, then the stationary ring is placed in the accommodating space and detachably and fixedly connected to the water jacket. Next, the lower section of the moving ring is placed in the accommodating space, and the upper section of the moving ring hugs the stirring shaft. The elastic component can make the bottom of the moving ring and the top of the stationary ring press against each other and form an end face seal. In this reactor stirring shaft mechanical seal structure, the upper section of the baffle forms an isolation band between the end face seal and the stirring shaft, which can prevent foreign objects from entering the reactor. This solves the problem that the debris from the wear at the end face seal during reactor operation can easily fall into the reactor through the stirring hole, effectively improving the first-pass yield of the product, stabilizing product quality, and reducing the price. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the mechanical seal structure for a reactor stirring shaft provided by this utility model; In the figure: 1 - stirring shaft, 100 - mounting assembly, 110 - water jacket, 111 - bearing platform, 1111 - first step, 1112 - second step, 120 - retaining sleeve, 130 - accommodating space, 140 - top sleeve, 141 - liquid injection hole, 200 - sealing assembly, 210 - stationary ring, 220 - moving ring, 221 - inner retraction space, 230 - pressure ring, 240 - clamp, 300 - elastic assembly, 310 - elastic element. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0018] This utility model provides a mechanical seal structure for the stirring shaft 1 of a reaction vessel, the structure of which is as follows: Figure 1As shown, the assembly includes an installation component 100, a sealing component 200, and an elastic component 300. The installation component 100 includes a water jacket 110 and a baffle 120. The bottom of the water jacket 110 is detachably and fixedly connected to the top of the reactor. The baffle 120 is disposed inside the water jacket 110. The outer wall of the lower section of the baffle 120 is sealed and fixedly connected to the inner wall of the lower section of the water jacket 110. An accommodating space is formed between the outer wall of the upper section of the baffle 120 and the inner wall of the upper section of the water jacket 110. Space 130; The sealing assembly 200 includes a stationary ring 210 and a rotating ring 220. The stationary ring 210 is disposed within the accommodating space 130 and is detachably and fixedly connected to the water jacket 110. The lower section of the rotating ring 220 is disposed within the accommodating space 130, and the upper section of the rotating ring 220 is used to hold the stirring shaft 1. The elastic assembly 300 is connected to the rotating ring 220 so that the bottom of the rotating ring 220 abuts against the top of the stationary ring 210 and forms an end face seal.

[0019] In use, firstly, the bottom of the water jacket 110 is detachably and fixedly connected to the top of the reactor. Then, the stationary ring 210 is placed in the accommodating space 130 and detachably and fixedly connected to the water jacket 110. Next, the lower section of the moving ring 220 is placed in the accommodating space 130, and the upper section of the moving ring 220 hugs the stirring shaft 1. The elastic component 300 can make the bottom of the moving ring 220 abut against the top of the stationary ring 210 and form an end face seal. In this reactor stirring shaft mechanical seal structure, the upper section of the baffle 120 forms an isolation band between the end face seal and the stirring shaft 1, which can prevent foreign objects from entering the reactor. This solves the problem that the debris from the wear at the end face seal during reactor operation can easily fall into the reactor through the stirring hole, effectively improving the first-pass yield, stabilizing product quality, and reducing the price.

[0020] As a preferred embodiment, please refer to Figure 1 The connection between the inner wall of the lower section and the inner wall of the upper section of the water jacket 110 forms a ring-shaped support platform 111. The stationary ring 210 rests on the support platform 111, thereby creating a gap between the outer wall of the upper section of the baffle 120 and the inner wall of the upper section of the water jacket 110, forming the accommodating space 130 above the support platform 111. This allows a barrier band to be formed between the end face seal and the stirring shaft 1 via the upper section of the baffle 120.

[0021] As a preferred embodiment, please refer to Figure 1The supporting platform 111 has a first step 1111 and a second step 1112 connected in sequence. The first step 1111 is close to the center of the water jacket 110, and the second step 1112 is close to the inner wall of the water jacket 110. The second step 1112 is higher than the first step 1111. The stationary ring 210 rests on the first step 1111. The first step 1111 can provide an installation position for the stationary ring 210.

[0022] In a preferred embodiment, the retaining sleeve 120 is a PTFE tube.

[0023] As a preferred embodiment, please refer to Figure 1 The installation assembly 100 also includes a top sleeve 140, the bottom of which is detachably and fixedly connected to the top of the water jacket 110. The upper section of the moving ring 220 is rotatably connected to the inner wall of the top sleeve 140. The upper end of the elastic component 300 is connected to the top sleeve 140, and the lower end of the elastic component 300 is connected to the moving ring 220. The top sleeve 140 can support and limit the moving ring 220.

[0024] In a preferred embodiment, the bottom of the top sleeve 140 is detachably fixed to the top of the water sleeve 110 via bolts.

[0025] As a preferred embodiment, please refer to Figure 1 The inner wall of the top sleeve 140 is a spherical structure, and the outer edge of the top of the moving ring 220 is a spherical structure. The spherical structure of the outer edge of the top of the moving ring 220 is rotatably connected to the spherical structure of the inner wall of the top sleeve 140. When the stirring shaft 1 wobbles, the moving ring 220 can wobble around the center of the sphere at a certain angle, thereby automatically compensating for the macroscopic oscillation and installation error of the stirring shaft 1, and ensuring that the sealing end face always maintains a good fit.

[0026] As a preferred embodiment, please refer to Figure 1 The top sleeve 140 has an injection hole 141, which is connected to the accommodating space 130 to inject isolation fluid into the accommodating space 130. The outer wall of the lower section of the moving ring 220 is provided with a bidirectional spiral groove. When the moving ring 220 rotates, the bidirectional spiral groove can drive the isolation fluid to circulate. On the one hand, it can remove the frictional heat generated at the end face seal, and on the other hand, the continuous flow of the isolation fluid prevents the medium from stagnating and crystallizing in key parts. The bidirectional spiral groove realizes the internal driving circulation of the isolation fluid, reduces the dependence on the complex external circulation system, and has a more compact structure and lower energy consumption.

[0027] As a preferred embodiment, please refer to Figure 1The inner diameter of the lower section of the moving ring 220 is larger than the inner diameter of its upper section, so as to form an inward space 221 on the inner side of its lower section, so that the lower section of the moving ring 220 can be arranged in the accommodating space 130. When the lower section of the moving ring 220 is arranged in the accommodating space 130, the inward space 221 is used for the upper section of the retainer 120 to abut.

[0028] As a preferred embodiment, please refer to Figure 1 The sealing assembly 200 further includes a pressure ring 230, which is disposed in the accommodating space 130 and rests on the stationary ring 210. The pressure ring 230 is also detachably and fixedly connected to the bearing platform 111 so as to press itself against the stationary ring 210, thereby realizing the detachable and fixed connection between the stationary ring 210 and the water jacket 110.

[0029] As a preferred embodiment, please refer to Figure 1 The pressure ring 230 is detachably and fixedly connected to the bearing platform 111 by bolts.

[0030] As a preferred embodiment, please refer to Figure 1 The portion of the pressure ring 230 near its center rests on the stationary ring 210, and the portion of the pressure ring 230 near its outer edge is detachably and fixedly connected to the support platform 111 to prevent the arrangement of the pressure ring 230 from interfering with the mutual contact between the moving ring 220 and the stationary ring 210.

[0031] As a preferred embodiment, please refer to Figure 1 The sealing assembly 200 also includes a clamp 240, which is sleeved on the upper section of the moving ring 220 and tightens the moving ring 220 so that the upper section of the moving ring 220 grips the stirring shaft 1, thereby enabling the moving ring 220 to grip or loosen the stirring shaft 1.

[0032] As a preferred embodiment, please refer to Figure 1 The elastic component 300 includes a plurality of elastic elements 310, each of which is distributed in a ring array structure, which can provide more uniform axial pressure to the moving ring 220.

[0033] As a preferred embodiment, please refer to Figure 1 The elastic element 310 is a spring.

[0034] To better understand this utility model, the following is combined with... Figure 1 The working principle of the technical solution of this utility model will be described in detail below: The mechanical seal structure for the stirring shaft 1 of the reaction vessel provided by this utility model has the following beneficial effects: (1) In the mechanical seal structure of the stirring shaft of this reactor, when the stirring shaft 1 swings, the moving ring 220 can swing around the center of the ball at a certain angle, thereby automatically compensating for the macroscopic swing and installation error of the stirring shaft 1, and ensuring that the sealing end face always maintains a good fit. (2) In this reactor stirring shaft mechanical seal structure, when the moving ring 220 rotates, the bidirectional spiral groove can drive the isolation liquid to circulate. On the one hand, it can remove the frictional heat generated at the end face seal, and on the other hand, the continuous flow of the isolation liquid prevents the medium from stagnating and crystallizing in key parts. (3) The mechanical seal structure of the stirring shaft of this reactor, the bidirectional spiral groove realizes the built-in drive circulation of the isolation liquid, reduces the dependence on the complex external circulation system, the structure is more compact and the energy consumption is lower; (4) The mechanical seal structure of the stirring shaft of this reactor has a ring of isolation zone formed between the upper section of the sleeve 120 and the stirring shaft 1 at the end face seal, which can prevent foreign objects from entering the reactor. This solves the problem that the debris worn at the end face seal during reactor operation can easily fall into the reactor through the stirring hole, effectively improving the first-pass yield of the product, stabilizing product quality, and keeping the price low.

[0035] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A mechanical seal structure for a reactor stirring shaft, characterized in that, include: The mounting assembly includes a water jacket and a baffle. The bottom of the water jacket is detachably and fixedly connected to the top of the reactor. The baffle is arranged inside the water jacket. The outer wall of the lower section of the baffle is sealed and fixedly connected to the inner wall of the lower section of the water jacket. An accommodating space is formed between the outer wall of the upper section of the baffle and the inner wall of the upper section of the water jacket. A sealing assembly includes a stationary ring and a rotating ring. The stationary ring is disposed within the accommodating space and is detachably and fixedly connected to the water jacket. The lower section of the rotating ring is disposed within the accommodating space, and the upper section of the rotating ring is used to hold the stirring shaft. An elastic component is connected to the rotating ring such that the bottom of the rotating ring abuts against the top of the stationary ring, forming an end-face seal.

2. The mechanical seal structure for the stirring shaft of the reactor according to claim 1, characterized in that, The connection between the inner wall of the lower section and the inner wall of the upper section of the water jacket forms a ring-shaped support platform, and the stationary ring rests on the support platform.

3. The mechanical seal structure for the stirring shaft of the reactor according to claim 2, characterized in that, The support platform has a first step and a second step connected in sequence. The first step is close to the center of the water jacket, the second step is close to the inner wall of the water jacket, and the second step is higher than the first step. The stationary ring rests on the first step.

4. The mechanical seal structure for the stirring shaft of the reactor according to claim 1, characterized in that, The installation assembly also includes a top sleeve, the bottom of which is detachably and fixedly connected to the top of the water jacket, the upper section of the moving ring being rotatably connected to the inner wall of the top sleeve, the upper end of the elastic component being connected to the top sleeve, and the lower end of the elastic component being connected to the moving ring.

5. The mechanical seal structure for the stirring shaft of the reactor according to claim 4, characterized in that, The inner wall of the top sleeve is a spherical structure, and the outer edge of the top of the moving ring is a spherical structure. The spherical structure of the outer edge of the top of the moving ring is rotatably connected to the spherical structure of the inner wall of the top sleeve.

6. The mechanical seal structure for the stirring shaft of the reactor according to claim 4, characterized in that, A liquid injection hole is provided on the top sleeve, and the liquid injection hole is connected to the accommodating space to inject isolation liquid into the accommodating space through the liquid injection hole. A bidirectional spiral groove is provided on the outer wall of the lower section of the moving ring. When the moving ring rotates, the bidirectional spiral groove can drive the isolation liquid to circulate.

7. The mechanical seal structure for the stirring shaft of the reactor according to claim 1, characterized in that, The inner diameter of the lower section of the moving ring is larger than the inner diameter of its upper section, so as to form an inward space on the inner side of its lower section.

8. The mechanical seal structure for the stirring shaft of the reactor according to claim 2, characterized in that, The sealing assembly also includes a pressure ring, which is disposed within the accommodating space and rests on the stationary ring. The pressure ring is also detachably and fixedly connected to the support platform so as to press itself against the stationary ring.

9. The mechanical seal structure for the stirring shaft of the reactor according to claim 1, characterized in that, The sealing assembly also includes a clamp, which is fitted onto the upper section of the rotating ring and tightens the rotating ring so that the upper section of the rotating ring grips the stirring shaft.

10. The mechanical seal structure for the stirring shaft of the reactor according to claim 1, characterized in that, The elastic component includes multiple elastic elements, each of which is distributed in a ring array structure.

Images