Pressure-resistant quick-opening self-tightening sealing structure of fluidized bed granulator

Abstract

The utility model discloses a pressure-resistant quick-opening self-tightening sealing structure of a fluid bed granulator, which comprises a base, a middle cylinder and a filter chamber which are sequentially arranged from bottom to top, the top of the base and the bottom of the filter chamber are respectively provided with a first flange, and the top and the bottom of the middle cylinder are respectively provided with a second flange which is used for butt joint among the base, the middle cylinder and the filter chamber; a sealing ring groove is formed in the side, close to the second flange, of the first flange and used for embedding a U-shaped sealing ring, an open sliding block groove is formed in the other side of the first flange, and a sealing sliding block is arranged in the sliding block groove in a sliding mode. According to the utility model, a self-tightening sealing mode of compressed air filling and gas medium pressure in the cavity is adopted, the higher the pressure in the cavity is, the tighter the sealing is, and the sealing device is more suitable for the sealing of an organic solvent explosion suppression type boiling granulator structure with a certain pressure requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of fluidized granulators, in particular to a compression-resistant quick-opening self-tightening sealing structure for a fluidized granulator. Background Art

[0002] There are certain gaps among the middle cylinder body, the filter chamber and the base of the existing fluidized granulator for pharmaceutical use. Each cylinder body can be disassembled independently. The sealing structures among them mostly adopt the mushroom head seal and the airbag seal structure pressed by a cylinder, which have certain deficiencies in terms of compression resistance and cannot withstand relatively large pressure in the cavity. Summary of the Utility Model

[0003] In order to solve the problem that the existing fluidized granulator for pharmaceutical use has certain deficiencies in terms of compression resistance and cannot withstand relatively large pressure in the cavity, the utility model provides a compression-resistant quick-opening self-tightening sealing structure for a fluidized granulator.

[0004] To achieve the above object, the utility model provides the following technical solutions:

[0005] A compression-resistant quick-opening self-tightening sealing structure for a fluidized granulator, comprising a base, a middle cylinder body and a filter chamber which are arranged in sequence from bottom to top. First flanges are arranged at the top of the base and the bottom of the filter chamber, and second flanges are arranged at the top and the bottom of the middle cylinder body for docking between the base, the middle cylinder body and the filter chamber. A sealing ring groove is arranged on one side of the first flange close to the second flange for inlaying a U-shaped sealing ring. A slider groove with an opening is arranged on the other side of the first flange. A sealing slider is slidably arranged in the slider groove, and an air inlet cover plate is arranged on the opening side of the slider groove. An air inlet joint communicated with an external compressor is arranged on the air inlet cover plate for introducing compressed air into the slider groove. The slider groove is communicated with the sealing ring groove through a second ventilation hole and is communicated with the cavity of the filter chamber or the base through a first ventilation hole.

[0006] Preferably, the middle cylinder body is an inverted conical cylinder body, the diameter of the second flange on the lower side is smaller than that of the second flange on the upper side, and the diameter of the first flange on the corresponding base is smaller than that of the first flange on the filter chamber.

[0007] Preferably, a semi-circular first guard plate is arranged on the outer side of the first flange, and a semi-circular second guard plate is arranged on the outer side of the second flange. The first guard plate and the second guard plate are combined to form a circular guard plate to wrap the outer edges of the first flange and the second flange.

[0008] Compared with the prior art, the beneficial effect of the utility model is that the utility model adopts the self-tightening sealing form of filling compressed air and the gas medium pressure in the cavity. The higher the pressure in the cavity, the tighter the seal, and it is more suitable for the seal of the structure of the organic solvent explosion-proof type fluidized granulator with certain pressure requirements. Brief Description of the Drawings

[0009] Figure 1 Schematic diagram of the positional relationship among the base, the middle cylinder and the filtration chamber in the embodiment of the present utility model;

[0010] Figure 2 is Figure 1 top view structural schematic diagram of;

[0011] Figure 3 is Figure 2 A - A cross - sectional structural schematic diagram in;

[0012] Figure 4 is Figure 3 magnified schematic diagram of I in;

[0013] Figure 5 Internal cavity gas path diagram of sealing mode one in the embodiment of the present utility model;

[0014] Figure 6 Internal cavity gas path diagram of sealing mode two in the embodiment of the present utility model.

[0015] In the figure: 1. Base, 2. Middle cylinder, 3. Filtration chamber, 4. First flange, 5. First guard plate, 6. Second flange, 7. Second guard plate, 8. Intake air cover plate, 9. Intake air joint, 10. Slide block groove, 11. First ventilation hole, 12. Sealing slide block, 13. Second ventilation hole, 14. Sealing ring groove, 15. U - shaped sealing ring. Detailed implementation manners

[0016] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0018] Such as Figures 1 to 4As shown in the figure, the embodiment of the utility model includes a base 1, a middle cylinder 2 and a filtration chamber 3 which are arranged in sequence from bottom to top. First flanges 4 are arranged at the top of the base 1 and the bottom of the filtration chamber 3. Second flanges 6 are arranged at the top and the bottom of the middle cylinder 2 for docking between the base 1, the middle cylinder 2 and the filtration chamber 3. On one side of the first flange 4 close to the second flange 6, there is a sealing ring groove 14 for inlaying a U-shaped sealing ring 15. On the other side of the first flange 4, there is an open slider groove 10. A sealing slider 12 is slidably arranged in the slider groove 10. And an air inlet cover plate 8 is arranged at the open side of the slider groove 10. An air inlet joint 9 communicating with an external compressor is arranged on the air inlet cover plate 8 for introducing compressed air into the slider groove 10. The slider groove 10 communicates with the sealing ring groove 14 through a second ventilation hole 13 and communicates with the cavity of the filtration chamber 3 or the base 1 through a first ventilation hole 11.

[0019] Preferably, the middle cylinder 2 is an inverted conical cylinder, the diameter of the second flange 6 on its lower side is smaller than the diameter of the second flange 6 on its upper side, and correspondingly, the diameter of the first flange 4 on the base 1 is smaller than the diameter of the first flange 4 on the filtration chamber 3. A semi-circular first guard plate 5 is arranged outside the first flange 4, and a semi-circular second guard plate 7 is arranged outside the second flange 6. After the first guard plate 5 and the second guard plate 7 are combined, they form a circular guard plate to wrap the outer edges of the first flange 4 and the second flange 6.

[0020] First, as Figure 1 shown, horizontally move the middle cylinder 2 below the filtration chamber 3. There is a certain gap between the filtration chamber 3 and the middle cylinder 2, and this gap is usually 5 - 10 mm, ensuring that the middle cylinder 2 can smoothly move horizontally to the middle of the filtration chamber 3 and the base 1 without getting stuck or collided. In this way, the filtration chamber 3, the middle cylinder 2 and the base 1 can be docked.

[0021] Then, as Figure 4 and Figure 5As shown in the figure, when the filter chamber 3 and the middle cylinder 2 are in place, compressed air with a pressure of 0.2 - 0.4 MPa is introduced into the slider groove 10 through the air inlet joint 9. Since the air pressure inside the cavity formed by the filter chamber 3, the middle cylinder 2 and the base 1 at this time is the atmospheric pressure, which is less than the pressure of the compressed air, under the action of the pressure difference, the sealing slider 12 moves down to the bottom of the slider groove 10, blocking the communication channel between the sealed cavity and the inside of the cavity. The compressed air enters the upper sealed space of the sealing ring groove 14 through the second air vent 13. Under the action of the pressure, the U-shaped sealing ring 15 deforms. Due to the special structure of the U-shaped sealing ring 15, the bottom of the U-shaped sealing ring 15 closely adheres to the upper surface of the second flange 6, preventing the gas inside the cavity from leaking to the outside of the cavity through the gap between the filter chamber 3 and the middle cylinder 2. At the same time, the two wings on the upper part of the U-shaped sealing ring 15 closely adhere to the side surface of the sealing ring groove 14, preventing the compressed air from leaking out, achieving the sealing effect. At this time, start the fan of the fluidized bed granulator, hot air enters the fluidized bed granulator, and the inside of the cavity is in a slightly negative pressure state, maintaining the compressed air to drive the seal, and the fluidized bed granulator works normally. This is the first sealing mode.

[0022] After the fluidized bed granulator finishes working, cut off the supply of compressed air to the air inlet joint 9 and open the exhaust port. Due to the disappearance of the pressure effect, the deformation of the U-shaped sealing ring 15 returns to its original state, disengaging from the extrusion state with the second flange 6 of the middle cylinder 2, and the middle cylinder 2 can be horizontally moved away from the docking state with the filter chamber 3 and the base 1.

[0023] As Figure 4 and Figure 6 shown in the figure, when the fluidized bed granulator is working normally and is in the state of being sealed by compressed air, if a dust or medium explosion occurs inside the cavity of the fluidized bed granulator, the pressure inside the cavity rises sharply. The gas inside the cavity of the fluidized bed granulator enters the sealed cavity through the first air vent 11. When the pressure of the gas inside the cavity is greater than the pressure of the compressed gas, the pressure difference pushes the sealing slider 12 up to the top of the slider groove 10, blocking the intake channel of the compressed air, and instead, the compressed air enters the upper sealed space of the U-shaped sealing ring 15 through the second air vent 13, making the U-shaped sealing ring 15 fit more closely to the surface of the second flange 6, ensuring that the sealing structure will not fail due to the rise in the internal cavity pressure of the fluidized bed granulator resulting in insufficient sealing pressure provided by the compressed air, and moreover, as the internal cavity pressure increases, the sealing pressure also increases accordingly, achieving the effect of self-tightening seal. This is the second sealing mode.

[0024] After the explosion energy inside the internal cavity is exhausted, the pressure inside the internal cavity decreases. When the pressure inside the internal cavity is less than the pressure of the compressed air, the compressed air re-enters the sealed cavity for sealing.

[0025] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A pressure-resistant quick-opening self-tightening sealing structure of a boiling granulator, comprising a base, a middle cylinder and a filter chamber arranged in sequence from bottom to top, wherein the top of the base and the bottom of the filter chamber are both provided with a first flange, and the top and bottom of the middle cylinder are both provided with a second flange for docking between the base, the middle cylinder and the filter chamber; characterized in that: A sealing ring groove is provided on one side of the first flange close to the second flange for embedding a U-shaped sealing ring, and an open slider groove is provided on the other side of the first flange, a sealing slider is slidably provided in the slider groove, and an air intake cover plate is provided on the open side of the slider groove, and an air intake joint connected to an external compressor is provided on the air intake cover plate for introducing compressed air into the slider groove; the slider groove is connected to the sealing ring groove through the second air vent, and is connected to the cavity of the filter chamber or the base through the first air vent.

2. The pressure-resistant quick-opening self-tightening sealing structure of a boiling granulator according to claim 1, characterized in that: The middle cylinder is an inverted cone-shaped cylinder, the diameter of the second flange on the lower side is smaller than the diameter of the second flange on the upper side, and the diameter of the first flange on the corresponding base is smaller than the diameter of the first flange on the filter chamber.

3. A pressure-resistant quick-opening self-tightening sealing structure for a boiling granulator according to claim 1 or 2, characterized in that: A semicircular first guard plate is arranged on the outer side of the first flange, and a semicircular second guard plate is arranged on the outer side of the second flange. The first guard plate and the second guard plate are combined to form a circular guard plate that wraps the outer edges of the first flange and the second flange.

Images