Rotating shaft protection device and reaction kettle

Abstract

The utility model provides a kind of rotating shaft protection device and reaction kettle, rotating shaft protection device includes outer shell, guide rail assembly, protective screen and suction assembly, and is provided with open mouth on outer shell;Guide rail assembly is installed in the outside of the outer shell, and has the movable end of the circumferential sliding direction of outer shell;Protective screen is connected with the movable end of guide rail assembly, and has the first position state of sliding to close the open mouth and form isolated chamber, and the second position state of sliding to separate from the open mouth.The utility model provides the circumferential sliding direction of protective screen by guide rail assembly, and in the sliding process of protective screen separation open mouth, suction end of suction assembly can also be moved to open mouth side, protective screen can be attached to the shape of outer shell periphery before and after sliding, occupy smaller moving space, reach open mouth, and remove suction assembly, provide larger operating space at open mouth, can be easily overhauled and maintained.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, specifically to a rotating shaft protection device and a reaction vessel. Background Technology

[0002] At the connection point between the rotating shaft and the motor of the reactor, a certain distance is usually required between the shaft and the top of the reactor. This provides effective thermal isolation and also allows for maintenance and repair of the shaft and the mechanical seal. A mechanical seal is typically used to seal the connection between the shaft and the reactor, preventing the leakage of harmful gases such as ammonia. For example, Chinese Patent 202220604406.0 discloses a reactor and its rotating shaft rotary seal structure. The sealing structure includes a rotating shaft that enters the reactor through a shaft hole in the reactor's top cover; and a mechanical seal, one end of which is tightly fitted onto the rotating shaft, forming a receiving cavity between the mechanical seal and the shaft. In the area between the rotating shaft of the reactor's agitator motor and the top of the reactor body, ammonia leakage can easily occur due to the aging of the mechanical seal. Currently, a protective cover combined with a suction pipeline is used to extract the leaked ammonia.

[0003] However, the structure and layout of the protective cover and ammonia suction pipeline will encroach on the operating space between the stirring paddle shaft motor and the top of the reactor body, making it inconvenient to disassemble and move, which will lead to inconvenience for subsequent inspection and maintenance. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a rotating shaft protection device to solve the technical problem that the structure and arrangement of the protective cover and ammonia gas suction pipeline in the prior art will occupy the operating space of the space between the stirring paddle rotating shaft motor and the top of the reactor body, making it inconvenient to disassemble and move, and causing inconvenience for subsequent inspection and maintenance.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, this utility model provides a rotating shaft protection device, comprising: The outer casing has an opening on it; A guide rail assembly, which is mounted on the outside of the housing and has a movable end that slides and guides the housing circumferentially; A protective mesh cover, connected to the movable end of a guide rail assembly, has a first position state in which it slides to close the opening and form an isolation chamber, and a second position state in which it slides to disengage from the opening; and A suction assembly having a suction end connected to the protective mesh cover and capable of moving with the protective mesh cover, communicating with the isolation chamber in a first position state.

[0006] In some embodiments, the suction assembly includes a connecting tube, a telescopic tube, and a suction tube, which are connected end to end in sequence. The connecting tube is connected to the protective mesh cover, and the suction tube is used to suction gas and guide it to the gas treatment chamber.

[0007] In some embodiments, a support rail is connected to the outer side of the outer shell. The support rail is arc-shaped and matches the outer periphery of the outer shell, and is slidably connected to the bottom outer side of the telescopic tube to guide the telescopic tube to extend and retract circumferentially along the outer shell.

[0008] In some embodiments, the suction tube is fixedly connected to the outer casing via a bracket.

[0009] In some embodiments, the guide rail assembly includes an arc rail and a slider mechanism, one end of which is connected to the protective mesh cover, and the slider mechanism is slidably connected to the arc rail.

[0010] In some embodiments, one end of the arc track is connected to the outer side of the outer shell, the slider mechanism includes a slider body and an elastic telescopic member, the elastic telescopic member is mounted on the slider body, and the telescopic end of the elastic telescopic member is connected to the protective mesh cover, elastically pushing the protective mesh cover to move radially along the outer shell.

[0011] In some embodiments, the elastic telescopic member includes a connecting rod and a spring. The slider body has through holes corresponding to the connecting rods. The connecting rods are slidably connected to the through holes. The two ends of the spring are respectively connected to the protective mesh cover and the slider body, and are sleeved on the outside of the connecting rods.

[0012] In some embodiments, the protective mesh cover has a sealing ring on the side near the outer shell, and the opening has a groove that matches the sealing ring.

[0013] In some embodiments, the protective mesh cover has mesh openings in the upper half, and the suction end is connected to the lower half of the protective mesh cover.

[0014] Secondly, this utility model also provides a reaction vessel, including the shaft protection device as described in any one of the above.

[0015] Compared with the prior art, the rotating shaft protection device provided by this utility model is made by fitting the outer shell onto the outside of the rotating shaft between the motor and the reactor, and working with the protective mesh and the suction assembly to provide basic protection and collect harmful gases. The guide rail assembly provides circumferential sliding guidance for the protective mesh. During the sliding process of the protective mesh detaching from the opening, the suction end of the suction assembly can also be moved to the side of the opening. The protective mesh can conform to the outer circumference of the outer shell before and after sliding, occupying a small amount of moving space, so as to open the opening and remove the suction assembly, providing a large operating space at the opening, which is convenient for inspection and maintenance. Attached Figure Description

[0016] Figure 1 This is a reaction vessel equipped with a shaft protection device provided in this embodiment of the utility model; Figure 2 This is a three-dimensional view of the shaft protection device provided in this embodiment of the utility model; Figure 3 This is another three-dimensional view of the rotating shaft protection device provided in this embodiment of the utility model; Figure 4 This is a utility model Figure 3 A magnified view of part A; Figure 5 This is a top view of the rotating shaft protection device provided in this embodiment of the utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Outer shell; 101. Opening; 102. Isolation chamber; 103. Groove; 2. Guide rail assembly; 21. Arc rail; 21a. Guide hole; 22. Slider mechanism; 221. Slider body; 221a. Through hole; 222. Elastic telescopic component; 222a. Connecting rod; 222b. Spring; 3. Protective mesh cover; 301 sealing ring; 4. Suction assembly; 41. Connecting pipe; 42. Telescopic pipe; 43. Suction pipe; 44. Support rail; 45. Bracket; 5. Reactor. Detailed Implementation

[0018] 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 merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] To address the technical problem that the structural arrangement of the protective cover and ammonia suction pipeline encroaches on the operating space between the reactor's agitator shaft motor and the top of the reactor body, making disassembly and relocation inconvenient and hindering subsequent maintenance, this invention provides a shaft protection device. This device, fitted onto the outside of the shaft between the motor and the reactor, works in conjunction with a protective mesh and suction assembly to provide basic protection and collect harmful gases. A guide rail assembly provides circumferential sliding guidance for the protective mesh. During the sliding of the protective mesh away from the opening, the suction end of the suction assembly also moves to the side of the opening. The protective mesh conforms to the outer circumference of the outer shell both before and after sliding, occupying minimal moving space. This allows for opening the opening and removal of the suction assembly, providing a larger operating space at the opening for easier maintenance.

[0020] It should be noted that the rotating shaft protection device described in this utility model is used in, but not limited to, reactors, etc. For ease of explanation, this utility model only uses the application of the rotating shaft protection device in a reactor as an example for explanation. The principle of the rotating shaft protection device applied to other types of equipment is essentially the same as that applied to a reactor, and will not be described in detail here.

[0021] Please see Figure 1-5 This utility model provides a rotating shaft protection device, which includes a housing 1, a guide rail assembly 2, a protective mesh cover 3, and a suction assembly 4. The housing 1 has a vertical opening 101 on its front side. The housing 1 is a cylindrical protective cover used to fit over the outside of the rotating shaft between the reactor drive motor and the top of the reactor body, providing external protection. The guide rail assembly 2 is installed on the outside of the housing 1 and has a movable end that slides and guides along the circumference of the housing 1. There are at least two guide rail assemblies 2, and the movable ends of both guide rail assemblies 2 are fixedly connected to the protective mesh cover 3, providing relatively stable movement guidance. The protective mesh cover 3 is connected to the movable end of the guide rail assembly 2 and has the ability to slide to close the opening 101. The system forms an isolation chamber 102 in a first position and slides to a second position away from the opening 101. In the first position, the protective mesh cover 3 covers the opening 101, forming the isolation chamber 102, providing external and internal protection. When ammonia gas leaks out, the protective mesh cover 3 can block the leakage of ammonia gas. Furthermore, with the suction of the suction assembly 4, it can further suppress the leakage of ammonia gas. The suction assembly 4 has a suction end connected to the protective mesh cover 3 and can move with the protective mesh cover 3. In the first position, it connects to the isolation chamber 102. In the second position, it moves away with the protective mesh cover 3 to prevent the pipeline from being blocked at the opening.

[0022] In this embodiment, by moving the protective mesh cover 3 along the guide rail assembly 2 and switching between a first position and a second position, it can be in a protective state that covers the opening 101 and in a maintenance state that is detached from the opening 101. When the protective mesh cover 3 moves, it can drive the suction end of the suction assembly 4 to move together, which can prevent the suction pipeline from being blocked at the opening and affecting the maintenance of the rotating shaft and mechanical seal inside the opening.

[0023] In one embodiment, please refer to Figure 2 and Figure 4 To ensure the suction end moves with the protective mesh cover 3 and to prevent the suction pipe from being blocked at the opening 101, the suction assembly 4 includes a connecting pipe 41, a telescopic pipe 42, and a suction pipe 43. The connecting pipe 41, the telescopic pipe 42, and the suction pipe 43 are connected end to end in sequence, and the connecting pipe 41 is connected to the protective mesh cover 3. The suction pipe 43 is used to suction gas and guide it to the gas treatment chamber. The connecting pipe 41 and the suction pipe 43 are both rigid pipes, while the telescopic pipe 42 is a corrugated flexible hose that can be folded, contracted, and stretched. Therefore, when the protective mesh cover 3 moves, it can drive the connecting pipe 41 to move. When the connecting pipe 41 moves, it can stretch or compress the telescopic pipe 42. Compression will cause the telescopic pipe 42 to fold and contract, and stretching will cause the telescopic pipe 42 to stretch and extend.

[0024] Furthermore, to prevent the telescopic tube 42 from failing to retract and occupying a large space due to lack of guidance, the outer shell 1 is connected to a support rail 44. The support rail 44 is arc-shaped and matches the outer circumference of the outer shell 1, and is slidably connected to the bottom outer side of the telescopic tube 42. It is used to guide the telescopic tube 42 to extend and retract along the circumference of the outer shell 1. The support rail 44 firstly supports the bottom of the telescopic tube 42 and restricts its middle part from bending downward and falling, so as to prevent the connecting tube 41 from failing to fold when it moves. In addition, the support rail 44 is arc-shaped, which not only supports it but also guides it to fold and retract in accordance with its arc.

[0025] Furthermore, the suction pipe 43 is fixedly connected to the outer shell 1 via a bracket 45, and the position of the suction pipe 43 is fixed to avoid unnecessary shaking during suction. The extension of the suction pipe 43 is mainly connected to the ammonia treatment chamber. Taking advantage of the high solubility of ammonia in water, it is treated with water to generate ammonia water, which can be recycled. Alternatively, ammonia can be treated through a neutralization reaction with an acidic solution. A suction pump is also installed at the tail end of the suction pipe 43 and the ammonia treatment chamber for suction, thereby generating suction in the suction pipe 43, the telescopic pipe 42, and the connecting pipe 41 to draw out the ammonia overflowing from the isolation chamber 102. The ammonia treatment chamber can be in the form of a packed tower, a spray tower, a Venturi scrubber, etc. The ammonia treatment chamber can also employ adsorption, using porous materials to adsorb ammonia molecules, such as activated carbon, zeolite molecular sieves, silica gel, and activated alumina.

[0026] Understandably, gases other than ammonia can be treated according to their characteristics to avoid direct emission into the air and resulting pollution of the factory environment.

[0027] In one embodiment, please refer to Figure 2 and Figure 4 In order to provide sliding guidance for the protective net cover 3, the guide rail assembly 2 includes an arc rail 21 and a slider mechanism 22. The arc rail 21 is concentric with the outer shell 1 and the length of the rail matches the width of the protective net cover 3. One end of the slider mechanism 22 is connected to the protective net cover 3, and the slider mechanism 22 is slidably connected to the arc rail 21. By sliding the slider mechanism 22 relative to the arc rail 21, the sliding direction of the protective net cover 3 is guided.

[0028] Furthermore, to provide a tighter fit, one end of the arc track 21 is connected to the outer side of the outer shell 1, providing connection and support. The slider mechanism 22 includes a slider body 221 and an elastic telescopic member 222. The elastic telescopic member 222 is mounted on the slider body 221, and the telescopic end of the elastic telescopic member 222 is connected to the protective mesh cover 3, elastically pushing the protective mesh cover 3 to move radially along the outer shell 1. The elastic telescopic member 222 provides the protective mesh cover 3 to be radially pressed towards the opening 101 of the outer shell 1, improving the tightness of the cover.

[0029] Understandably, in order to avoid excessive friction during use, the protective net cover 3 needs to be pulled radially in the opposite direction to detach it from the outer surface of the outer shell 1 and then slide circumferentially.

[0030] Furthermore, to provide elastic resistance and guide its stable radial movement, the elastic telescopic member 222 includes a connecting rod 222a and a spring 222b. The slider body 221 has through holes 221a corresponding to the connecting rods 222a. The connecting rods 222a are slidably connected to the through holes 221a. The two ends of the spring 222b are connected to the protective mesh cover 3 and the slider body 221, respectively, and are sleeved on the outside of the connecting rods 222a. The relative sliding between the slider body 221 and the connecting rods 222a provides sliding guidance, preventing deviation from the position. Additionally, the arc track 21 also has guide holes 21a along the track direction, allowing the connecting rods 222a to pass through the arc track 21 and slide along the guide holes 21a.

[0031] Furthermore, in order to provide a seal between the protective mesh cover 3 and the opening 101, the protective mesh cover 3 is provided with a sealing ring 301 on the side near the outer shell 1, and the opening 101 is provided with a groove 103 that matches the sealing ring 301. Under the elastic push of the elastic telescopic member 222, the sealing ring 301 can be pressed into the groove 103 to fit together and form a seal.

[0032] In one embodiment, please refer to Figure 1 and Figure 2 In order to achieve a good suction effect, the protective mesh cover 3 has mesh holes in the upper half, and the suction end is connected to the lower half of the protective mesh cover 3. Through the suction of the lower half, a negative pressure is formed, which can promote the entry of external air into the isolation chamber 102 from the mesh holes in the upper half, and restrict the overflow gas from being discharged upward from the mesh holes. In addition, the suction end in the lower half is closer to the mechanical seal position between the rotating shaft and the vessel body, which can quickly suction the overflow gas.

[0033] This utility model also provides a reaction vessel, including a shaft protection device as described in any of the above embodiments, which is installed on the shaft portion between the drive motor and the top of the reaction vessel to protect the shaft and draw in overflowing gas.

[0034] To better understand this utility model, the following is combined with... Figures 1 to 5The technical solution of this utility model is described in detail as follows: When protection is required, the protective net cover 3 is slid to the first position, covering the opening 101 to form an isolation chamber 102. The sliding movement is performed by first sliding along the arc rail 21 of the guide rail assembly 2. When the sliding reaches the opening 101, the protective net cover 3 is released, causing the spring 222b to rebound and push the sealing ring 301 of the protective net cover 3 into the groove 103 inside the opening 101. During the above actions, the connecting pipe 41 drives the telescopic movement. When the tube 42 is extended, the protective mesh cover 3 is pulled radially away from the outer shell 1 to disengage the sealing ring 301 from the groove 103. Then, it slides along the arc track 21 to disengage the protective mesh cover 3 from the opening 101 area. After releasing the protective mesh cover 3, the sealing ring 301 of the protective mesh cover 3 is pushed back by the spring 222b to fit against the outer wall of the outer shell 1, forming an anti-slip positioning. At this time, the opening is unobstructed, which makes it convenient for staff to inspect and maintain the rotating shaft and mechanical seal inside the opening 101.

[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 rotating shaft protection device, characterized in that, include: The outer casing has an opening on it; A guide rail assembly, which is mounted on the outside of the housing and has a movable end that slides and guides the housing circumferentially; A protective mesh cover, which is connected to the movable end of the guide rail assembly, and has a first position state in which it slides to close the opening and form an isolation chamber, and a second position state in which it slides to disengage from the opening; as well as A suction assembly having a suction end connected to the protective mesh cover and capable of moving with the protective mesh cover, communicating with the isolation chamber in a first position state.

2. The shaft protection device according to claim 1, characterized in that, The suction assembly includes a connecting pipe, a telescopic pipe, and a suction pipe, which are connected end to end in sequence. The connecting pipe is connected to the protective mesh cover, and the suction pipe is used to draw in gas and guide it to the gas treatment chamber.

3. The shaft protection device according to claim 2, characterized in that, The outer side of the outer shell is connected to a support rail, which is arc-shaped and matches the outer periphery of the outer shell. It is slidably connected to the bottom of the outer side of the telescopic tube to guide the telescopic tube to extend and retract circumferentially along the outer shell.

4. The shaft protection device according to claim 3, characterized in that, The suction tube is fixedly connected to the outer shell via a bracket.

5. The shaft protection device according to claim 1, characterized in that, The guide rail assembly includes an arc rail and a slider mechanism. One end of the slider mechanism is connected to the protective mesh cover, and the slider mechanism is slidably connected to the arc rail.

6. The shaft protection device according to claim 5, characterized in that, One end of the arc track is connected to the outer side of the outer shell. The slider mechanism includes a slider body and an elastic telescopic member. The elastic telescopic member is installed on the slider body, and the telescopic end of the elastic telescopic member is connected to the protective mesh cover, elastically pushing the protective mesh cover to move radially along the outer shell.

7. The shaft protection device according to claim 6, characterized in that, The elastic telescopic component includes a connecting rod and a spring. The slider body has through holes corresponding to the connecting rods. The connecting rods are slidably connected to the through holes. The two ends of the spring are connected to the protective mesh cover and the slider body, respectively, and are sleeved on the outside of the connecting rods.

8. The shaft protection device according to claim 1, characterized in that, The protective mesh cover has a sealing ring on the side near the outer shell, and the opening has a groove that matches the sealing ring.

9. The shaft protection device according to claim 1, characterized in that, The protective mesh cover has mesh holes in the upper half, and the suction end is connected to the lower half of the protective mesh cover.

10. A reaction vessel, characterized in that, Includes the shaft protection device as described in any one of claims 1-9.

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