Sealing strengthening device for electric heater port of polycrystalline silicon hydrogenation reactor

Abstract

The utility model discloses a sealing strengthening device for an electric heater port of a polycrystalline silicon hydrogenation reactor, which comprises a heater shell, a flange arranged at the upper end of the heater shell, a central through hole formed in the flange, a first annular groove and a second annular groove formed in the upper end face of the flange, and a sealing ring arranged in the first annular groove, the center through hole, the first annular groove and the second annular groove are coaxially arranged, the clamping ring is installed in the first annular groove, a rack is arranged on the outer wall of the clamping ring and meshed with a gear, the gear is rotatably installed on the flange, a plurality of pressing plates which are evenly distributed at intervals in the circumferential direction are arranged on the inner wall of the clamping ring, and an end cover is installed in the second annular groove. Pressing plate pairs with the same number as the pressing plates are arranged in the circumferential direction of the end cover, the pressing plates are pressed on the pressing plate pairs to fix the pressing plate pairs and the flange in a sealing mode, and a plurality of through holes used for installing heating pipes are formed in the end cover. The sealing strengthening device can be quickly mounted and replaced in the mounting and replacing process, and is convenient to maintain.

Description

Technical Field

[0001] The utility model relates to a polysilicon hydrogenation reactor, in particular to a sealing strengthening device for an electric heater port of a polysilicon hydrogenation reactor. Background Art

[0002] Currently, in the entire industry, the most important hydrogenation reaction of polysilicon is still the cold hydrogenation reaction of silicon tetrachloride. When the electric heater in the reactor is working, the gas expands due to the increase in temperature, and the high-temperature and high-pressure gas enters the container. The temperature and pressure inside the reactor continue to rise and increase, which puts a certain burden on the sealing structure of the electric heater port. In addition, after a long period of use, the gasket used for sealing may cause wear, and there is a possibility of hydrogen leakage, which poses a certain safety hazard; the electric heater port uses multiple bolts to tightly connect the upper and lower flanges, such as Figure 1 As shown, the installation process is too complicated. Therefore, it is necessary to optimize and design a new type of sealing device for the electric heater port in view of the defects of the current device, so that the device sealing is simpler and easier to operate. Summary of the invention

[0003] The utility model aims at the problems existing in the prior art and proposes a sealing strengthening device for an electric heater port of a polysilicon hydrogenation reactor. The sealing strengthening device can be quickly installed and replaced during the installation and replacement process and is convenient for maintenance.

[0004] The technical solution adopted by the utility model is: a sealing strengthening device for the electric heater port of a polysilicon hydrogenation reactor, comprising a heater shell, a flange at the upper end of the heater shell, a central through hole at the flange, a first annular groove and a second annular groove at the upper end face of the flange, the inner diameter of the first annular groove being greater than the outer diameter of the second annular groove, the central through hole, the first annular groove and the second annular groove being coaxially arranged,

[0005] The clamping ring can be rotatably installed in the first annular groove with its own axis as the center. The outer wall of the clamping ring is provided with a rack, the rack meshes with a gear, the gear is rotatably installed on the flange, and the inner wall of the clamping ring is provided with a plurality of pressure plates spaced and evenly distributed in the circumferential direction.

[0006] An end cover is installed in the second annular groove. The end cover has pressure plate pairs that are the same in number as the pressure plates and are also evenly distributed in the circumferential direction. The pressure plates are pressed on the pressure plate pairs to seal and fix the pressure plate pairs to the flange. The end cover has several through holes for installing heating pipes.

[0007] Based on the above solution, preferably, the lower end surface of the end cover has a protrusion, the protrusion is located on the inner side of the pressure plate pair, the protrusion is installed in the second groove, and the outer edge of the end cover and the pressure plate pair are pressed on the upper end surface of the flange.

[0008] On the basis of the above scheme, preferably, the lower end surface of the pressure plate and / or the upper end surface of the pressure plate pair is a sloped surface. In the initial state, the pressure plate is located in the gap between two adjacent pressure plate pairs, and the gear drives the pressure plate to rotate relative to the pressure plate pair to press the pressure plate against the end cover to fix it.

[0009] On the basis of the above solution, preferably, the flange is provided with two limit posts, the limit posts are located on the movement path of the rack, and the rack is located between the two limit posts.

[0010] On the basis of the above solution, as a preferred embodiment, an L-shaped connector is fixedly mounted on the end cover, and the end of the L-shaped connector is rotatably mounted on a bracket, and the bracket is fixed to the upper end surface of the flange.

[0011] On the basis of the above solution, as a preferred embodiment, the gear is fixed on the rotating shaft, and the rotating shaft is rotatably mounted on the flange.

[0012] On the basis of the above solution, preferably, a gear handwheel is fixedly mounted on the upper end of the rotating shaft.

[0013] On the basis of the above scheme, as a preference, the upper end of the rotating shaft has a step surface, the gear handwheel is installed on the step surface and is fixedly connected to the rotating shaft through a slotted nut and a cotter pin.

[0014] On the basis of the above scheme, as a preferred embodiment, the lower end of the rotating shaft is rotatably connected to the ball handle, the end of the ball handle is fixedly connected to the fixed block, and the fixed block is fixed to the lower end surface of the flange.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The seal strengthening device can be quickly installed and replaced during installation and replacement, and is easy to maintain. The heated and expanded gas in the reactor squeezes the end cover. The greater the pressure, the tighter the end cover meshing, and the more significant the sealing effect. The seal strengthening device has a small difference in the seal preload force in all directions, which reduces the situation of unbalanced force on the seal end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of an electric heater port having an upper and lower flange structure in the prior art;

[0018] Figure 2 The utility model is a three-dimensional Figure 1 ;

[0019] Figure 3 The utility model is a three-dimensional Figure 2 ;

[0020] Figure 4 It is the three-dimensional end cap Figure 1 ;

[0021] Figure 5 It is the three-dimensional end cap Figure 2 ;

[0022] Figure 6 It is a structural schematic diagram of the flange of the utility model;

[0023] Figure 7 It is a cross-sectional view of the utility model. DETAILED DESCRIPTION

[0024] The present invention will be further described below by way of embodiments, but the scope of the present invention is not limited thereto.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0026] like Figure 1-7 As shown, a sealing strengthening device for an electric heater port of a polysilicon hydrogenation reactor comprises a heater shell, the upper end of the heater shell has a flange 1, the flange has a central through hole 2, the upper end surface of the flange has a first annular groove 3 and a second annular groove 4, the inner diameter of the first annular groove is greater than the outer diameter of the second annular groove, the central through hole, the first annular groove, and the second annular groove are coaxially arranged.

[0027] The clamping ring 5 can be rotatably installed in the first annular groove with its own axis as the center. The outer wall of the clamping ring is provided with a rack 6, which meshes with a gear 7. The gear is rotatably installed on the flange. The inner wall of the clamping ring is provided with a plurality of pressure plates 8 which are spaced and evenly distributed in the circumferential direction.

[0028] An end cover 9 is installed in the second annular groove. The end cover has pressure plate pairs 10 with the same number as the pressure plates and are also evenly distributed in the circumferential direction. The pressure plates are pressed on the pressure plate pairs to seal and fix the pressure plate pairs to the flange. The end cover has several through holes 11 for installing heating pipes.

[0029] The lower end surface of the end cover has a protrusion 12, which is located inside the pressure plate pair. The protrusion is installed in the second groove, and the outer edge of the end cover and the pressure plate pair are pressed on the upper end surface of the flange.

[0030] The lower end surface of the pressure plate and / or the upper end surface of the pressure plate pair are sloped surfaces. In the initial state, the pressure plate is located in the interval between two adjacent pressure plate pairs. The gear drives the pressure plate to rotate relative to the pressure plate pair to press the pressure plate against the end cover to fix it.

[0031] The flange is provided with two limiting posts 13, which are located on the movement path of the rack, and the rack is located between the two limiting posts.

[0032] An L-shaped connector 14 is fixedly mounted on the end cover, and the end of the L-shaped connector is rotatably mounted on a bracket 15, which is fixed to the upper end surface of the flange.

[0033] The gear is fixed on the rotating shaft 16, and the rotating shaft is rotatably mounted on the flange.

[0034] A gear handwheel 17 is fixedly mounted on the upper end of the rotating shaft.

[0035] The upper end of the rotating shaft has a step surface, and the gear handwheel is installed on the step surface and is fixedly connected to the rotating shaft through a slotted nut 18 and a cotter pin 19.

[0036] The lower end of the rotating shaft is rotatably connected to the ball handle 20, and the end of the ball handle is fixedly connected to the fixing block 21, and the fixing block is fixed to the lower end surface of the flange.

[0037] In the preparation stage, first weld the electric heater tube bundle to the through hole opened on the end cover, then align the serrated notch on the gear clamp ring with the serrated teeth protruding from the outer edge of the end cover, place the end cover with the welded electric heating tube bundle on the electric heater port, and then install the connecting hinge (bracket) to fix the end cover to the flange. By rotating the gear handwheel, the gear fixed on the rotating shaft is driven to rotate, and the gear is engaged with the rack on the gear clamp ring to drive the gear clamp ring to rotate. After rotating to a certain angle, the pressure plate of the gear clamp ring and the pressure plate pair of the end cover are dislocated, and the pressure plate pair is pressed to form a sealing state between the end cover and the flange bracket, replacing the original use of multiple bolts to achieve the fastening and sealing of the upper and lower flanges. The installation process is convenient and quick.

[0038] It should be noted that the embodiments described above are only used to explain the utility model and do not constitute any limitation to the utility model. The utility model is described by reference to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory words, rather than restrictive words. The utility model can be modified as specified within the scope of the claims of the utility model, and the utility model can be revised without departing from the scope and spirit of the utility model. Although the utility model described therein involves specific methods, materials and embodiments, it does not mean that the utility model is limited to the specific examples disclosed therein. On the contrary, the utility model can be extended to all other methods and applications with the same functions.

Claims

1. A sealing strengthening device for an electric heater port of a polysilicon hydrogenation reactor, characterized in that: The heater shell comprises a flange at the upper end thereof, the flange having a central through hole, the upper end surface of the flange having a first annular groove and a second annular groove, the inner diameter of the first annular groove being larger than the outer diameter of the second annular groove, the central through hole, the first annular groove and the second annular groove being coaxially arranged, The clamping ring can be rotatably installed in the first annular groove with its own axis as the center. The outer wall of the clamping ring is provided with a rack, the rack meshes with a gear, the gear is rotatably installed on the flange, and the inner wall of the clamping ring is provided with a plurality of pressure plates spaced and evenly distributed in the circumferential direction. An end cover is installed in the second annular groove. The end cover has pressure plate pairs that are the same in number as the pressure plates and are also evenly distributed in the circumferential direction. The pressure plates are pressed on the pressure plate pairs to seal and fix the pressure plate pairs to the flange. The end cover has several through holes for installing heating pipes.

2. The sealing strengthening device for the electric heater port of a polysilicon hydrogenation reactor according to claim 1, characterized in that: The lower end surface of the end cover is provided with a convex block, the convex block is located inside the pressure plate pair, the convex block is installed in the second groove, and the outer edge of the end cover and the pressure plate pair are pressed on the upper end surface of the flange.

3. The sealing strengthening device for the electric heater port of a polysilicon hydrogenation reactor according to claim 2, characterized in that: The lower end surface of the pressure plate and / or the upper end surface of the pressure plate pair are sloped surfaces. In the initial state, the pressure plate is located in the interval between two adjacent pressure plate pairs. The gear drives the pressure plate to rotate relative to the pressure plate pair to press the pressure plate against the end cover to fix it.

4. The sealing strengthening device for the electric heater port of a polysilicon hydrogenation reactor according to claim 1, characterized in that: The flange is provided with two limiting posts, the limiting posts are located on the movement path of the rack, and the rack is located between the two limiting posts.

5. The sealing strengthening device for the electric heater port of a polysilicon hydrogenation reactor according to claim 1, characterized in that: An L-shaped connector is fixedly mounted on the end cover, and an end of the L-shaped connector is rotatably mounted on a bracket, and the bracket is fixed on the upper end surface of the flange.

6. The sealing strengthening device for the electric heater port of a polysilicon hydrogenation reactor according to claim 1, characterized in that: The gear is fixed on the rotating shaft, and the rotating shaft is rotatably mounted on the flange.

7. The sealing strengthening device for the electric heater port of a polysilicon hydrogenation reactor according to claim 6, characterized in that: A gear handwheel is fixedly installed on the upper end of the rotating shaft.

8. The sealing strengthening device for the electric heater port of a polysilicon hydrogenation reactor according to claim 7, characterized in that: The upper end of the rotating shaft is provided with a step surface, and the gear hand wheel is installed on the step surface and is fixedly connected with the rotating shaft through a slotted nut and a cotter pin.

9. The sealing strengthening device for the electric heater port of a polysilicon hydrogenation reactor according to claim 6, characterized in that: The lower end of the rotating shaft is rotatably connected to the ball handle, the end of the ball handle is fixedly connected to the fixing block, and the fixing block is fixed on the lower end surface of the flange.

Images