Novel cloth bag blowback valve electrical fault detection device

Abstract

The utility model discloses a novel electrical fault detection device for a bag blowback valve, and relates to the technical field of bag-type dust removers. Comprising a machine shell, a protective cover is fixedly arranged at the top of the machine shell, a protective door is connected to the front face of the protective cover through hinges, a dehumidification mechanism is fixedly arranged at the top of the protective cover, an air inlet pipe is fixedly arranged on one side of the dehumidification mechanism, and an air outlet pipe is fixedly arranged on the other side of the dehumidification mechanism; and a drying plate is movably arranged in the dehumidification mechanism, an exhaust fan is arranged in the dehumidification mechanism, and a PLC and a humidity sensor are fixedly arranged at the top of the inner wall of the protective cover. According to the pressure transmitter, the protective cover and the protective door are arranged and combined, so that the pressure transmitter can be arranged in a closed space, the external environment can be effectively isolated, corrosion of external pollutants can be effectively resisted, and the service life of the pressure transmitter is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of baghouse dust collectors, specifically a novel electrical fault detection device for baghouse backflush valves. Background Technology

[0002] The bag backflush valve is an important component of a baghouse dust collector, mainly used to remove dust from the filter bags and maintain the performance of the dust collector.

[0003] Chinese utility model patent CN210543869U discloses a baghouse dust collector, including a casing, partitions, a filter device, a clean air chamber, a back-flushing system, and an ash discharge valve. The casing has an exhaust gas inlet on one side and a filter port on the top. The partitions are located inside the casing, dividing the inner cavity into multiple baghouse compartments. The filter device includes a bag frame and filter bags, with each baghouse compartment equipped with a set of filters. Multiple filters are back-flushed alternately. The clean air chamber communicates with the filter port and has a clean air outlet. The back-flushing system includes a main air supply pipe, branch air supply pipes, a back-flushing valve, and a pressure transmitter. The back-flushing valve is automatically controlled independently by a PLC. The pressure transmitter is located on the branch air supply pipe and is controlled by a distributed DCS system. The ash discharge valve is located at the bottom of the casing. This utility model features convenient inspection of the back-flushing valve for malfunctions.

[0004] In order to detect faults in the backflush valve, the aforementioned bag filter is equipped with a pressure transmitter and a DCS system. However, the aforementioned bag filter does not have the function of protecting the pressure transmitter. Since the pressure transmitter is always exposed to the external environment, it is easily corroded by pollutants, which affects its service life. Utility Model Content

[0005] This invention provides a novel electrical fault detection device for bag filter backflush valves to solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a novel electrical fault detection device for a bag filter backflush valve, comprising a housing, a protective cover fixedly installed on the top of the housing, a protective door connected to the front hinge of the protective cover, a dehumidification mechanism fixedly installed on the top of the protective cover, an air inlet pipe fixedly installed on one side of the dehumidification mechanism, an air outlet pipe fixedly installed on the other side of the dehumidification mechanism, a drying plate movably installed inside the dehumidification mechanism, and an exhaust fan installed inside the dehumidification mechanism;

[0007] A PLC controller and a humidity sensor are fixedly installed on the top of the inner wall of the protective cover. A scraping device is installed on the bottom of the inner wall of the housing. A lifting rod is movably installed inside the scraping device. A nut seat is fixedly installed at one end of the lifting rod. A lead screw is threadedly connected to the inner wall of the nut seat. One end of the lead screw is fixedly connected to the output shaft of the motor. A scraper is fixedly installed at the other end of the lifting rod.

[0008] Furthermore, the protective cover is provided with an air supply branch pipe inside, and a backflush valve is provided on the surface of the air supply branch pipe.

[0009] Furthermore, a main gas supply pipe is fixedly installed at one end of the gas supply branch pipe, a pressure tapping pipe is fixedly installed at the top of the gas supply branch pipe, a pressure tapping valve is installed on the surface of the pressure tapping pipe, and a pressure transmitter is fixedly installed at one end of the pressure tapping pipe.

[0010] Furthermore, a dust removal bag is installed inside the casing.

[0011] Furthermore, a belt conveyor is installed inside the housing.

[0012] Furthermore, the top and bottom of the inner wall of the dehumidification mechanism are fixedly provided with mounting frames, and the inner side of the mounting frames is provided with through grooves that are compatible with the drying plate.

[0013] Compared with the prior art, this utility model provides a novel electrical fault detection device for bag filter backflush valves, which has the following beneficial effects:

[0014] 1. This new type of bag backflush valve electrical fault detection device, by setting up a protective cover and a protective door, can place the pressure transmitter in a closed space, which can effectively isolate the external environment, thereby effectively resisting the corrosion of external pollutants and extending the service life of the pressure transmitter.

[0015] 2. This novel electrical fault detection device for a bag filter backflush valve incorporates a PLC controller, a humidity sensor, an exhaust fan, and a drying plate. The humidity sensor monitors the humidity inside the protective cover in real time. When the humidity reaches a preset threshold, the PLC controller activates the exhaust fan. The exhaust fan draws the moisture from the protective cover into a dehumidification mechanism, where the drying plate further dehumidifies the air, drying it completely. Finally, the dried air is discharged back into the protective cover, maintaining a dry environment inside and reducing the corrosive effect of moisture on the pressure transmitter.

[0016] 3. This new type of bag filter backflush valve electrical fault detection device consists of a motor, a lead screw, a nut seat, and a scraper. The motor drives the lead screw to rotate, and the nut seat drives the scraper to move vertically. When the scraper is in close contact with the conveyor belt of the belt conveyor, it can remove the dust adhering to the surface of the conveyor belt, thereby keeping the surface of the belt conveyor clean. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a front view of the structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the dehumidification mechanism of this utility model;

[0020] Figure 4 This is a schematic diagram of the scraping device of this utility model.

[0021] In the diagram: 1. Housing; 101. Dust collector bag; 2. Protective cover; 201. Air supply branch pipe; 202. Backflush valve; 203. Main air supply pipe; 204. Pressure tapping pipe; 205. Pressure tapping valve; 206. Pressure transmitter; 3. Dehumidification mechanism; 301. Air inlet pipe; 302. Air outlet pipe; 303. Mounting frame; 304. Drying plate; 305. Exhaust fan; 306. Protective door; 4. PLC controller; 5. Humidity sensor; 6. Belt conveyor; 7. Scraping device; 701. Lifting rod; 702. Nut seat; 703. Lead screw; 704. Motor; 705. Scraper. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4This utility model discloses a novel electrical fault detection device for a bag filter backflush valve, comprising a housing 1, a protective cover 2 fixedly mounted on the top of the housing 1, a protective door 306 hinged to the front of the protective cover 2, a door bolt on one side of the front of the protective door 306, which can be used to restrict the protective door 306 to prevent it from being opened accidentally, a dehumidification mechanism 3 fixedly mounted on the top of the protective cover 2, a maintenance plate mounted on the front of the dehumidification mechanism 3 by screws, and the interior of the dehumidification mechanism 3 can be inspected and maintained after the maintenance plate is removed, an air inlet pipe 301 fixedly mounted on one side of the dehumidification mechanism 3, an air outlet pipe 302 fixedly mounted on the other side of the dehumidification mechanism 3, a drying plate 304 movably mounted inside the dehumidification mechanism 3, and an exhaust fan 305 mounted inside the dehumidification mechanism 3;

[0024] A PLC controller 4 and a humidity sensor 5 are fixedly installed on the top of the inner wall of the protective cover 2. A scraping device 7 is installed on the bottom of the inner wall of the housing 1. A lifting rod 701 is movably installed inside the scraping device 7. A nut seat 702 is fixedly installed at one end of the lifting rod 701. A lead screw 703 is threadedly connected to the inner wall of the nut seat 702. One end of the lead screw 703 is fixedly connected to the output shaft of the motor 704. A scraper 705 is fixedly installed at the other end of the lifting rod 701.

[0025] Specifically, the protective cover 2 is provided with an air supply branch pipe 201 inside, and a backflush valve 202 is provided on the surface of the air supply branch pipe 201.

[0026] In this embodiment, by setting a backflush valve 202, when backflushing occurs, the backflush valve 202 opens, and compressed gas enters the gas supply branch pipe 201 through the gas supply main pipe 203, and then is sprayed into the dust collector bag 101. The dust collector bag 101 expands and vibrates rapidly, shaking off the attached dust. The shaken-off dust falls onto the conveyor belt of the belt conveyor 6.

[0027] Specifically, a gas main pipe 203 is fixedly installed at one end of the gas branch pipe 201, a pressure tapping pipe 204 is fixedly installed at the top of the gas branch pipe 201, a pressure tapping valve 205 is installed on the surface of the pressure tapping pipe 204, and a pressure transmitter 206 is fixedly installed at one end of the pressure tapping pipe 204.

[0028] In this implementation scheme, a pressure transmitter 206 is set up. The pressure transmitter 206 monitors the pressure change in the gas supply branch pipe 201 and indirectly reflects the working status of the backflush valve 202. The measured pressure signal is converted into an electrical signal and transmitted to the control system, such as a DCS system. The control system can determine whether there is an electrical fault in the backflush valve 202 by analyzing the pressure signal fed back by the pressure transmitter 206.

[0029] Specifically, a dust removal bag 101 is provided inside the housing 1.

[0030] In this embodiment, a dust collector bag 101, also known as a dust filter bag, dust collection bag, or dust accumulation bag, is installed and is a key component in the operation of the baghouse dust collector. The main function of the dust collector bag 101 is to capture and retain dust particles generated from industrial emission sources.

[0031] Specifically, a belt conveyor 6 is installed inside the housing 1.

[0032] In this embodiment, by setting up a belt conveyor 6, the conveyor belt on the belt conveyor 6 can transport dust to the dust collection hopper on one side of the bottom of the casing 1.

[0033] Specifically, the top and bottom of the inner wall of the dehumidification mechanism 3 are fixedly provided with mounting frames 303, and the inner side of the mounting frame 303 is provided with a through groove that is compatible with the drying plate 304.

[0034] In this embodiment, a mounting frame 303 is provided, and the mounting frame 303 and the drying plate 304 are connected by a sliding connection design, allowing the drying plate 304 to be easily disassembled. The drying plate 304 can be made of silicone or other suitable materials.

[0035] In use, the bag filter disclosed in Chinese utility model patent CN210543869U already has the function of fault detection of backflush valve, so this application will not repeat it.

[0036] The protective cover 2, combined with the protective door 306, places the pressure transmitter 206 within a closed space, effectively isolating it from the external environment and thus effectively resisting the corrosion of external pollutants. The humidity sensor 5 monitors the humidity inside the protective cover 2 in real time. When the humidity reaches a preset threshold, the PLC controller 4 activates the exhaust fan 305. The exhaust fan 305 draws the moisture inside the protective cover 2 into the dehumidification mechanism 3, where the drying plate 304 dehumidifies the moisture, making it dry. Finally, the dry gas is discharged back into the protective cover 2, maintaining a dry state inside the protective cover 2 and reducing the corrosion of the pressure transmitter 206 by moisture.

[0037] During backflushing, the backflushing valve 202 is opened, and compressed gas enters the gas supply branch pipe 201 through the gas supply main pipe 203, and then is sprayed into the dust collector bag 101. The dust collector bag 101 expands and vibrates rapidly, shaking off the attached dust. The shaken-off dust falls onto the conveyor belt on the belt conveyor 6, and then the conveyor belt on the belt conveyor 6 can transport the dust to the dust collection hopper on one side of the bottom of the casing 1.

[0038] In summary, this novel bag filter backflush valve electrical fault detection device, by incorporating a protective cover 2 and a protective door 306, effectively isolates the pressure transmitter 206 within a closed space, thus resisting the erosion of external pollutants and extending its service life. Furthermore, by incorporating a PLC controller 4, a humidity sensor 5, an exhaust fan 305, and a drying plate 304, the humidity sensor 5 monitors the humidity inside the protective cover 2 in real time. When the humidity reaches a preset threshold, the PLC controller 4 activates the exhaust fan 305. The exhaust fan 305 draws the moisture from the protective cover 2 into the dehumidification mechanism 3, where the drying plate 304 dehumidifies and dries the moisture. Finally, the dry gas is discharged back into the protective cover 2, thus maintaining the dry state inside the protective cover 2 and reducing the corrosion of the pressure transmitter 206 by moisture. This is achieved by configuring a motor 704, a lead screw 703, a nut seat 702, and a scraper 705. The motor 704 drives the lead screw 703 to rotate, and the nut seat 702 drives the scraper 705 to move vertically. When the scraper 705 is in close contact with the conveyor belt of the belt conveyor 6, it can remove the dust adhering to the surface of the conveyor belt, thereby keeping the surface of the conveyor belt of the belt conveyor 6 clean.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel electrical fault detection device for a bag filter backflush valve, comprising a housing (1), characterized in that: A protective cover (2) is fixedly installed on the top of the casing (1). A protective door (306) is connected to the front hinge of the protective cover (2). A dehumidification mechanism (3) is fixedly installed on the top of the protective cover (2). An air inlet pipe (301) is fixedly installed on one side of the dehumidification mechanism (3). An air outlet pipe (302) is fixedly installed on the other side of the dehumidification mechanism (3). A drying plate (304) is movably installed inside the dehumidification mechanism (3). An exhaust fan (305) is installed inside the dehumidification mechanism (3). A PLC controller (4) and a humidity sensor (5) are fixedly installed on the top of the inner wall of the protective cover (2). A scraping device (7) is installed on the bottom of the inner wall of the housing (1). A lifting rod (701) is movably installed inside the scraping device (7). A nut seat (702) is fixedly installed at one end of the lifting rod (701). A lead screw (703) is threadedly connected to the inner wall of the nut seat (702). One end of the lead screw (703) is fixedly connected to the output shaft of the motor (704). A scraper (705) is fixedly installed at the other end of the lifting rod (701).

2. The novel electrical fault detection device for a bag filter backflush valve according to claim 1, characterized in that: The protective cover (2) is provided with an air supply branch pipe (201) inside, and a backflush valve (202) is provided on the surface of the air supply branch pipe (201).

3. The novel electrical fault detection device for a bag filter backflush valve according to claim 2, characterized in that: One end of the gas supply branch pipe (201) is fixedly provided with a gas supply main pipe (203), the top of the gas supply branch pipe (201) is fixedly provided with a pressure tapping pipe (204), the surface of the pressure tapping pipe (204) is provided with a pressure tapping valve (205), and one end of the pressure tapping pipe (204) is fixedly provided with a pressure transmitter (206).

4. The novel electrical fault detection device for a bag filter backflush valve according to claim 1, characterized in that: The casing (1) is equipped with a dust removal bag (101).

5. The novel electrical fault detection device for a bag filter backflush valve according to claim 1, characterized in that: A belt conveyor (6) is installed inside the housing (1).

6. The novel electrical fault detection device for a bag filter backflush valve according to claim 1, characterized in that: The dehumidification mechanism (3) has a mounting frame (303) fixedly installed on the top and bottom of its inner wall. The inner side of the mounting frame (303) has a through groove that is compatible with the drying plate (304).

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