Filter bag anti-falling structure of fluidized bed

Abstract

The utility model discloses an anti-drop structure for a filter bag of a fluidized bed, which comprises a filter chamber positioned on the upper side and a boiling chamber positioned on the lower side, the filter bag is arranged in the filter chamber, the peripheral edge of the filter bag extends out of the joint between the filter chamber and the boiling chamber and then is folded upwards, and the folded part of the filter bag is locked on the outer wall of the filter chamber through a locking piece. The filter bag locking device can prevent the filter bag from falling off, is more stable and reliable compared with air expansion type locking, basically avoids the situation that materials escape along with air flow, and avoids unnecessary material loss.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field for medicine, health food granulation, fluidized bed drying, in particular to a filter bag anti -drop structure of fluidized bed. BACKGROUND

[0002] Fluidized bed, short for fluidized bed, is a kind of reactor that utilizes gas or liquid to pass through granular solid layer to make solid particles in suspended motion state and carry out gas-solid phase reaction process or liquid-solid phase reaction process.

[0003] At present, the fluidized bed used for medicine, health food granulation, fluidized bed drying mostly adopts rear fan, that is, exhaust fan is used to suck hot air into the boiling chamber to make wet material in the boiling chamber in sustained "boiling" state, and high-density filter bag is used as filter device in the filter chamber in the upper part to "intercept" the material, so that the wet material is "boiled" and fluidized in the boiling chamber, and the moisture in the wet material is gradually taken away to achieve the purpose of drying the wet material.

[0004] The filter bag of the traditional fluidized bed is usually supported by filter bag framework, and the filter bag is fixed on the filter bag framework, and then a gas bag made of silica gel is arranged around the bottom of the filter bag framework, the gas bag is inflated with compressed air, and the gas bag is expanded to tightly fit the inner wall of the filter chamber of the fluidized bed to form an interference fit, so that the filter bag framework is fixed on the inner wall of the filter chamber of the fluidized bed to fix the filter bag.

[0005] However, in actual use, when the compressed air pressure is reduced, or the gas bag is damaged due to aging with the increase of use time, the gas bag cannot tightly fit the inner wall of the filter chamber of the fluidized bed, causing the filter bag framework to loosen, so that the material below the filter bag directly escapes through the gap between the filter bag framework and the filter chamber along with the airflow, causing unnecessary material loss. UTILITY MODEL CONTENTS

[0006] The utility model aims at overcoming the defects and deficiencies in the prior art, and provides a filter bag anti-drop structure of fluidized bed, which can prevent the filter bag from falling off, is more stable and reliable than the air expansion type locking, and can prevent the material from escaping along with the airflow to avoid unnecessary material loss.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] A filter bag anti-drop structure of fluidized bed, comprising a filter chamber on the upper side and a boiling chamber on the lower side, wherein the filter chamber is provided with a filter bag, characterized in that: the periphery of the filter bag is extended from the joint between the filter chamber and the boiling chamber and then folded upward, and the folded part of the filter bag is locked to the outer wall of the filter chamber by a locking piece.

[0009] Further, the outer wall of the lower port of the filtering chamber and the outer wall of the upper port of the boiling chamber are integrally connected with annular extension edges, and the annular extension edges on the upper side and the lower side are fixedly connected with silica gel rings on opposite sides.

[0010] Further, the periphery of the filter bag is folded upward after passing between the silica gel rings on the upper side and the lower side.

[0011] Further, the locking member is a hoop, the hoop comprises a C-shaped hoop body and extension seats integrally connected to two ends of the C-shaped hoop body, through holes penetrating through each other are arranged on the two extension seats, a bolt extends out from the through hole on one side, and a locking nut is screwed on the extended end of the bolt.

[0012] Further, a plurality of thin film pressure sensors are fixedly connected to the outer wall of the filtering chamber in the circumferential direction, and the folded part of the filter bag is locked to the outer wall of the filtering chamber by the locking member and is pressed against the surfaces of the plurality of thin film pressure sensors.

[0013] Further, an air blower is connected to the top end of the filtering chamber, a relay is connected to the power supply circuit of the air blower, and the plurality of thin film pressure sensors are electrically connected to the alarm and the relay through a microprocessor.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model lengthens the existing filter bag, extends the filter bag from the lower port of the filtering chamber, and locks the filter bag to the outer wall of the filtering chamber by the locking member after being folded upward, so that the extended part of the filter bag can be clamped when the boiling chamber rises and is closed to the filtering chamber, the filter bag can be prevented from falling off, the filter bag is more stable and reliable compared with the air expansion type locking, the situation that the material escapes with the airflow is basically eliminated, and unnecessary material loss is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the utility model, in the drawing, the curved arrow represents the flow direction of the material, and the straight arrow represents the flow direction of the airflow.

[0017] Figure 2 It is Figure 1 the structure of part A in the drawing.

[0018] Figure 3 It is a structural schematic view of the hoop in the utility model.

[0019] Figure 4 It is a structural schematic view of the thin film pressure sensor in the utility model,

[0020] Figure 5 It is an electrical control principle block diagram of the utility model. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor fall within the scope of the utility model.

[0022] Referring to Figures 1-5 A filter bag anti-falling structure of a fluidized bed, comprising a filter chamber 1 located at the upper side and a boiling chamber 2 located at the lower side, a filter bag 3 is arranged in the filter chamber 1, the periphery edge of the filter bag 3 is folded upward after extending from the joint between the filter chamber 1 and the boiling chamber 2, i.e. from the lower port of the filter chamber 1, and the folded part of the filter bag 3 is locked to the outer wall of the filter chamber 1 by a locking piece 4.

[0023] In the utility model, the outer wall of the lower port of the filter chamber 1 and the outer wall of the upper port of the boiling chamber 2 are integrally connected with annular extension edges 5, and the annular extension edges 5 at the upper side and the lower side are fixedly connected with silica gel rings 6 at the opposite sides.

[0024] In the utility model, the periphery edge of the filter bag 3 is folded upward after extending through the silica gel rings 6 at the upper side and the lower side.

[0025] Therefore, when the boiling chamber 2 is raised and is closed to the filter chamber 1, the silica gel rings 6 at the upper side and the lower side can not only clamp the extension part of the filter bag 3, but also can play a good sealing role.

[0026] In the utility model, the locking piece 4 adopts a hoop, the hoop 4 comprises a C-shaped hoop body 41 and extension seats 42 integrally connected to the two ends of the C-shaped hoop body 41, through holes penetrating through each other are arranged on the two extension seats 42, a bolt 43 extends out from one side through the through hole, and a locking nut 44 is screwed on the extension end of the bolt 43.

[0027] Therefore, by screwing the locking nut 44, the locking nut 44 abuts against the outer side surface of one extension seat 42, and the nut end of the bolt 43 abuts against the outer side surface of the other extension seat 42, so as to lock the folded part of the filter bag 3 to the outer wall of the filter chamber 1.

[0028] In the utility model, a plurality of thin film pressure sensors 7 are fixedly connected to the outer wall of the filter chamber 1 along the circumferential direction, and the folded part of the filter bag 3 is pressed against the surfaces of the plurality of thin film pressure sensors 7 after being locked to the outer wall of the filter chamber 1 by the locking piece 4.

[0029] In this invention, an exhaust fan (not shown in the figure) is connected to the top of the filter chamber 1. A relay (normally closed type) 8 is connected in the power supply circuit of the exhaust fan. Several thin-film pressure sensors 7 are electrically connected to the alarm 10 and the relay 7 through the microprocessor 9.

[0030] Therefore, when the filter bag 3 is properly locked, each thin-film pressure sensor 7 will detect the pressure applied to it by the folded part of the filter bag 3 and output a corresponding electrical signal, such as a high-level signal, to the microprocessor 9. At this time, the microprocessor 9 can determine that the filter bag 3 is in a properly locked state.

[0031] When the locking element 4 becomes loose, causing the filter bag 3 to fall off entirely or partially, all or some of the thin-film pressure sensors 7 will not detect the pressure applied to the filter bag 3 by the folded part, and will not output any electrical signal to the microprocessor 9, or will output a corresponding electrical signal to the microprocessor 9, such as a low-level signal. At this time, the microprocessor 9 sends a control command to the relay 8, the relay 8 is disconnected, the power supply circuit of the induced draft fan is disconnected, and the fluidization operation of the material is stopped; on the other hand, it outputs an alarm signal through the alarm 10.

[0032] The present invention will be further described below with reference to the accompanying drawings:

[0033] This invention extends the existing filter bag 3 so that it extends from the lower end of the filter chamber 1 and then folds upwards, and is locked to the outer wall of the filter chamber 1 by the locking member 4, which plays the role of the first locking.

[0034] When the boiling chamber 2 rises and aligns with the filter chamber 1, the silicone rings 6 on the upper and lower sides can clamp the extension of the filter bag 3, playing a second locking role.

[0035] As can be seen from the above, the double locking action can prevent the filter bag 3 from falling off, thereby replacing the air-expansion locking method using an air bladder. This is not only more stable and reliable, but also reduces the material leakage caused by the filter bag 3 loosening due to insufficient compressed air pressure or air bladder leakage, thus avoiding unnecessary material loss and minimizing quality risks.

[0036] Furthermore, airbags are fragile and easily consumable items, so eliminating their use can reduce manufacturing costs.

[0037] In addition, the utility model discloses adopt film pressure sensor 7 as detection element, when locking piece 4 appears loose and causes filter bag 3 whole or partial drop, all or partial film pressure sensor 7 does not detect the pressure that the turn -up of filter bag 3 exerted to it, does not output any electric signal to microprocessor 9, or the corresponding electric signal such as low level signal is outputted to microprocessor 9, at this time, microprocessor 9 one side sends control instruction to relay 8, and relay 8 is disconnected, and the power supply circuit of air blower is disconnected, and the fluidization operation of material is stopped, another aspect is through alarm 10 output alarm signal, in order to discover and handle in the first time.

[0038] Although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0039] Therefore, the above only describes the preferred embodiments of the present application, and is not intended to limit the scope of the present application; that is, various equivalent transformations made within the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A filter bag anti-detachment structure for a fluidized bed, comprising an upper filtration chamber and a lower boiling chamber, wherein a filter bag is disposed in the filtration chamber, characterized in that: The four peripheral edges of the filter bag are folded upward after extending from the joint between the filter chamber and the boiling chamber, and the folded part of the filter bag is locked to the outer wall of the filter chamber by the locking member.

2. The bag anti-drop structure of a fluidized bed according to claim 1, characterized in that: The outer wall of the lower port of the filter chamber and the outer wall of the upper port of the boiling chamber are integrally connected with annular extension edges, and the annular extension edges on the upper side and the lower side are fixedly connected with silica gel rings on opposite sides.

3. The bag anti-drop structure of a fluidized bed according to claim 2, characterized in that: The four peripheral edges of the filter bag are folded upward after extending through the silica gel rings on the upper side and the lower side.

4. The bag anti-drop structure of a fluidized bed according to claim 1, characterized in that: The locking member is a clamp, which includes a C-shaped clamp body and extension seats integrally connected to the two ends of the C-shaped clamp body, through holes are arranged on the two extension seats, a bolt extends through the through hole from one side, and a locking nut is screwed on the extended end of the bolt.

5. The bag anti-drop structure of a fluidized bed according to claim 1, characterized in that: The outer wall of the filter chamber is fixedly connected with a plurality of thin film pressure sensors along the circumference thereof, and the folded part of the filter bag is pressed against the surfaces of the thin film pressure sensors after being locked to the outer wall of the filter chamber by the locking member.

6. The bag anti-drop structure of a fluidized bed according to claim 5, characterized in that: A fan is connected to the top end of the filter chamber, a relay is connected to the power supply circuit of the fan, and the plurality of thin film pressure sensors are electrically connected with the alarm and the relay through a microprocessor.

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