Blowing device of bag-type dust collector

Abstract

The utility model discloses a blowing device of a bag-type dust collector, which relates to the technical field of bag-type dust collectors and comprises a blowing component. The blowing assembly comprises an air bag, an air compressor, an electromagnetic valve, a blowing pipe, a blowing transverse pipe, a controller and a pressure sensor. The air bag is provided with a cavity used for containing compressed air. An inlet of the air compressor communicates with the atmosphere, and an outlet of the air compressor communicates with the cavity. An inlet of the electromagnetic valve is communicated with the cavity, an inlet of the blowing pipe is communicated with an outlet of the electromagnetic valve, an inlet of the blowing transverse pipe is communicated with an outlet of the blowing pipe, and a plurality of outlets of the blowing transverse pipe are arranged at intervals in the length direction of the blowing transverse pipe. The controller is used for sending out a control instruction and is electrically connected with the electromagnetic valve. The pressure sensor is used for measuring the air pressure in the cavity and electrically connected with the controller. Compared with the prior art, the injection device provided by the utility model solves the problem of a compressed air source on site, and adopts a movable arrangement mode, so that the overall structure is simplified, and the device cost and the later maintenance difficulty are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bag dust collectors, in particular to a blowing device for bag dust collectors. Background Art

[0002] When a bag filter operates, dust-laden air passes through the bags, trapping dust particles on their surfaces. As dust accumulates on the bags, the collector's resistance increases, reducing dust removal efficiency. At this point, the air injection system must be activated for dust removal. The air injection system injects compressed air into the bags, creating a powerful airflow. This airflow causes the bags to vibrate and deform, shaking off the accumulated dust.

[0003] Currently, the blowing device of the bag dust collector generally includes an air storage tank. The centralized air compressor station delivers compressed air to the air storage tank through a pipeline, and the air storage tank supplies air to the air bag. This air supply method has the following disadvantages:

[0004] 1) Increased energy consumption: Transmitting compressed air over long distances requires greater power to overcome pipeline resistance and pressure loss, resulting in increased energy consumption and operating costs.

[0005] 2) Temperature Differences Lead to Condensation: When there is a significant difference between the outside air temperature and the flue gas temperature inside the dust collector, especially in winter or cold regions, the compressed air transported over long distances can experience a significant temperature drop when it is instantly sprayed into the filter bags. This can cause water to separate out and cause condensation. This condensation can adhere to the dust on the filter bag surface, causing it to stick and clog the filter bag pores, causing the dust collector to malfunction.

[0006] 3) Pipeline wear and leakage: Long-distance pipeline transportation increases the potential risk of pipeline wear, especially at bends and joints. Pipeline leakage can also cause a drop in compressed air pressure, affecting dust removal efficiency and potentially introducing foreign impurities.

[0007] 4) Increased difficulty in maintenance: Long-distance pipeline systems increase the difficulty of maintenance and inspection, especially when checking for leaks and replacing parts, which requires more time and human resources.

[0008] 5) Increased control difficulty: Compressed air transported over long distances is more complex to control and requires more precise pressure and flow control to ensure dust removal effectiveness. Utility Model Content

[0009] The purpose of the utility model is to provide a blowing device for a bag dust collector to solve the problems existing in the above-mentioned related technologies and to solve the compressed air source on site.

[0010] To achieve the above purpose, the present invention provides the following solutions:

[0011] The utility model discloses a blowing device for a bag dust collector, comprising a blowing assembly, wherein the blowing assembly comprises:

[0012] An air bag, wherein the air bag has a cavity for containing compressed air;

[0013] an air compressor for supplying air to the cavity, wherein the inlet of the air compressor is connected to the atmosphere, and the outlet of the air compressor is connected to the cavity;

[0014] a solenoid valve for controlling the air injection process, wherein the inlet of the solenoid valve is connected to the cavity;

[0015] a blow pipe for directing compressed air to the cloth bag, wherein the inlet of the blow pipe is connected to the outlet of the solenoid valve;

[0016] A blowing transverse pipe for diverting compressed air, wherein the inlet of the blowing transverse pipe is connected to the outlet of the blowing transverse pipe, and the outlets of the blowing transverse pipe are provided in plurality and spaced apart along the length direction of the blowing transverse pipe;

[0017] a controller for issuing control instructions, the controller being electrically connected to the solenoid valve;

[0018] A pressure sensor is used to measure the air pressure in the cavity, and the pressure sensor is electrically connected to the controller.

[0019] Preferably, the blowing device of the bag dust collector also includes a track and a trolley; the track is used to be installed in the clean air chamber of the bag dust collector, the trolley is used to travel along the track, and the trolley is connected to the air bag; the controller is electrically connected to the motor of the trolley.

[0020] Preferably, the track is connected to a tow cable bracket, and a tow cable is hung on the tow cable bracket. The tow cables respectively supply power to the controller, the air compressor, the solenoid valve and the traveling vehicle.

[0021] Preferably, the track is connected to a Gray bus, which is arranged along the length direction of the track, and the tow cable supplies power to the Gray bus; the traveling vehicle is connected to a reading device matching the Gray bus, and the reading device is used to read the Gray bus to obtain the position information of the traveling vehicle on the track; the tow cable supplies power to the reading device; the reading device is electrically connected to the controller to send the position information of the traveling vehicle to the controller.

[0022] Preferably, the track is an I-beam, the tow cable bracket is connected to the upper flange plate of the I-beam, and the Gray busbar is connected to the lower flange plate of the I-beam.

[0023] Preferably, there are two air compressors, which are respectively connected to the two lateral ends of the air bag.

[0024] Preferably, there are multiple solenoid valves, each of which corresponds to one blowing pipe and one blowing transverse pipe; multiple outlets of one blowing transverse pipe are used to spray compressed air into the same bag, and the distance between two adjacent blowing transverse pipes is the distance between two adjacent bags.

[0025] Preferably, the blowing assembly also includes a flange structure, which includes a circular tube and a flange connected to the circular tube; the end of the circular tube facing away from the flange is connected to the cavity, and the flange is connected to the solenoid valve; the inlet end of the blowing pipe is located in the circular tube, so that an annular air gap is formed between the blowing pipe and the circular tube, and the inlet of the solenoid valve is connected to the annular air gap.

[0026] Preferably, the blowing pipe passes through the air bag, the inlet of the blowing pipe is located above the air bag, and the outlet of the blowing pipe is located below the air bag.

[0027] Preferably, the outlet of the blowing horizontal pipe is connected to a nozzle.

[0028] Compared with the related art, the utility model has achieved the following technical effects:

[0029] 1) The bag-type dust collector's blowing device does not utilize the conventional air supply method of delivering compressed air through an air supply pipeline. Instead, it utilizes an air compressor integrated into the air bag to compress external air, generating compressed air locally. Therefore, this bag-type dust collector's blowing device avoids the technical drawbacks of the prior art mentioned in the background. Furthermore, by eliminating the air storage tank, its associated piping, and its associated solenoid valve, it not only simplifies the overall structure and reduces device costs, but also eases subsequent maintenance.

[0030] 2) In the preferred embodiment of the present invention, the position of the spray assembly can be adjusted by the movement of the traveling vehicle, so that the spray transverse pipe can spray different bags, thereby making the number of outlets of the spray transverse pipe less than the number of bags, and also reducing the number of spray pipes and solenoid valves corresponding to the spray transverse pipe, as well as the number of control lines corresponding to the solenoid valve. Therefore, since the spray device of the bag dust collector has a walking function, it can greatly reduce the complexity of the device and reduce the cost of the device. In addition, compared to the existing technology in which the position of the spray transverse pipe is fixed, this embodiment can drive the displacement of the spray transverse pipe by the displacement of the traveling vehicle, so that after opening the cover of the clean air chamber, the bags under the spray assembly can be replaced quickly and conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 Schematic diagram of the positional relationship between the track and the traveling vehicle;

[0033] Figure 2 is a schematic diagram of the blowing assembly;

[0034] Figure 3 for Figure 2 Schematic diagram of the structure from the top view;

[0035] Figure 4 This is a schematic diagram of the blowing device of the bag dust collector according to an embodiment of the present invention (from the perspective of facing the air compressor).

[0036] In the figure: 1-track; 2-traveling vehicle; 3-tow cable; 4-Gray busbar; 5-reading device; 6-hanging ear; 7-air bag; 8-solenoid valve; 9-lifting ear; 10-injection cross pipe; 11-air compressor; 12-injection pipe; 13-cloth bag. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] The purpose of the utility model is to provide a blowing device for a bag dust collector to solve the problems existing in the above-mentioned related technologies and to solve the compressed air source on site.

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0040] Reference Figures 1 to 4 This embodiment provides a blowing device for a bag dust collector, including a blowing assembly, which includes an air bag 7, an air compressor 11, a solenoid valve 8, a blowing pipe 12, a blowing cross pipe 10, a controller and a pressure sensor.

[0041] The interior of the air bag 7 has a cavity for containing compressed air. The air compressor 11 is used to supply air to the cavity. The inlet of the air compressor 11 is connected to the atmosphere, and the outlet of the air compressor 11 is connected to the cavity. The solenoid valve 8 is used to control the jetting process. The inlet of the solenoid valve 8 is connected to the cavity. The blow pipe 12 is used to guide the compressed air to the cloth bag 13. The inlet of the blow pipe 12 is connected to the outlet of the solenoid valve 8. The blow cross pipe 10 is used to divert the compressed air. The inlet of the blow cross pipe 10 is connected to the outlet of the blow pipe 12. There are multiple outlets of the blow cross pipe 10 and they are spaced apart along the length of the blow cross pipe 10. The controller is used to issue control instructions, and the controller is electrically connected to the solenoid valve 8. The pressure sensor is used to measure the air pressure in the cavity, and the pressure sensor is electrically connected to the controller.

[0042] The principle of the blowing device of the bag dust collector is as follows:

[0043] When the air pressure measured by the pressure sensor is lower than the air pressure preset in the controller, the controller starts the air compressor 11, which presses external air into the cavity of the air bag 7. When the air pressure measured by the pressure sensor is equal to the air pressure preset in the controller, the controller turns off the air compressor 11, and the air pressure in the cavity is maintained at the air pressure preset in the controller.

[0044] After the solenoid valve 8 is opened, the compressed air in the cavity enters the inlet of the solenoid valve 8 and flows out from the outlet of the solenoid valve 8. The compressed air then flows through the blowing pipe 12 to the blowing transverse pipe 10. The air is sprayed from the multiple outlets of the blowing transverse pipe 10 to the cloth bag 13, causing the cloth bag 13 to vibrate and deform under the impact of the air flow, thereby shaking off the dust accumulated on the cloth bag 13.

[0045] The bag-type dust collector's blowing device does not utilize the conventional air supply method of delivering compressed air through an air supply pipeline. Instead, it utilizes an air compressor 11 integrated into the air bag 7 to compress external air, generating compressed air locally. Therefore, this bag-type dust collector's blowing device avoids the technical drawbacks of the prior art mentioned in the background. Furthermore, by eliminating the air storage tank and its associated piping and solenoid valve, it not only simplifies the overall structure and reduces device costs, but also eases subsequent maintenance.

[0046] In this embodiment, the air bag 7 is in the shape of a cuboid, and its length or width direction is parallel to the length direction of the injection horizontal pipe 10. According to different actual needs, those skilled in the art can also choose air bags 7 of other shapes.

[0047] As a possible example, in this embodiment, the bag filter is equipped with a differential pressure sensor. This sensor measures the pressure difference between the bag filter's inlet and outlet. The sensor is electrically connected to the controller. As dust-laden flue gas continuously enters the bag filter, the amount of dust adhering to the outside of the bags 13 gradually increases, causing the pressure difference between the bag filter's inlet and outlet to change accordingly. When this pressure difference reaches a set value, the controller opens the solenoid valve 8.

[0048] It is understandable that the opening of the electromagnetic valve 8 can also be controlled in other ways, such as timed opening, manual control opening, etc.

[0049] As a possible example, in this embodiment, the blowing device of the bag filter further includes a track 1 and a trolley 2. The track 1 is mounted within the clean air chamber of the bag filter. The trolley 2 is configured to travel along the track 1 and is connected to an air bag 7. The controller is electrically connected to the motor of the trolley 2 to control the movement of the trolley 2.

[0050] By moving the traveling vehicle 2, the position of the spray assembly can be adjusted so that the spray transverse pipe 10 can spray different bags 13, thereby making the number of outlets of the spray transverse pipe 10 less than the number of bags 13, and also reducing the number of spray pipes 12 and solenoid valves 8 corresponding to the spray transverse pipe 10, as well as the number of control lines corresponding to the solenoid valve 8. Therefore, since the spray device of the bag dust collector has a walking function, the complexity of the device can be greatly reduced and the cost of the device can be reduced. In addition, compared to the existing technology in which the position of the spray transverse pipe is fixed, this embodiment can drive the spray transverse pipe 10 to shift by the displacement of the traveling vehicle 2, so that after opening the cover of the clean air chamber, the bag 13 below the spray assembly can be replaced quickly and conveniently.

[0051] When the pressure difference between the bag filter's inlet and outlet reaches a set value, the controller first controls vehicle 2 to move to the designated spraying position, aligning the outlet of spraying transverse pipe 10 with bag filter 13, and then opens solenoid valve 8. After spraying is completed at a certain position, solenoid valve 8 closes, and vehicle 2 moves to the next designated spraying position to continue the spraying operation.

[0052] As a possible example, in this embodiment, the track 1 is connected to a tow cable bracket, which is hung with a tow cable 3. The tow cable 3 respectively provides power to the controller, air compressor 11, solenoid valve 8, and trolley 2. Trolley 2 is generally driven by an electric motor, and the tow cable 3 provides power to the motor of trolley 2. It is understood that trolley 2 can also be driven by a battery, in which case the motor does not need to be connected to the tow cable 3.

[0053] As a possible example, in this embodiment, the track 1 is connected to a Golay busbar 4, which runs along the length of the track 1. A towline 3 supplies power to the Golay busbar 4. The carriage 2 is connected to a reading device 5, which is compatible with the Golay busbar 4 and is used to read the Golay busbar 4 to obtain the position of the carriage 2 on the track 1. The towline 3 supplies power to the reading device 5. The reading device 5 is electrically connected to a controller to transmit the position information of the carriage 2, enabling the controller to more accurately control the position of the carriage 2 and achieve precise, targeted injection.

[0054] It is understandable that the encoding surface of the Golay bus 4 should face the reading device 5 for easy reading. In this embodiment, the reading device 5 is located below the Golay bus 4.

[0055] After the Gray busbar 4 and reading device 5 are installed, initial calibration is performed. During calibration, the reading device 5 reads the starting position code on the Gray busbar 4 and uses this as a reference to establish a coordinate system. Calibration also checks the operating status of the reading device 5 to ensure it can accurately read the coded information on the Gray busbar 4. In this embodiment, there are four spraying transverse tubes 10, with five cloth bags 13 forming one spraying unit. A vehicle positioning point is set at each spraying unit.

[0056] As a possible example, in this embodiment, the track 1 is an I-beam, the tow cable support is connected to the upper flange of the I-beam, and the Gray busbar 4 is connected to the lower flange of the I-beam. Specifically, the Gray busbar 4 is arranged on the lower surface of the lower flange, and the wheels of the trolley 2 run along the upper surface of the lower flange. Those skilled in the art may also select other track 1 configurations based on actual needs.

[0057] As a possible example, in this embodiment, there are two air compressors 11, each connected to the lateral ends of the air bag 7. This distribution at both ends makes the overall weight distribution more even, and the two air compressors 11 can increase the compressed air supply speed. It is understood that those skilled in the art may also select other numbers of air compressors 11 (e.g., four air compressors 11) and adopt other distribution methods (e.g., air compressors 11 are arranged on each side of the air bag 7).

[0058] As a possible example, in this embodiment, there are multiple solenoid valves 8, each of which corresponds to a blow pipe 12 and a blow transverse pipe 10. The multiple outlets of a blow transverse pipe 10 are used to spray compressed air into the same bag 13, and the distance between two adjacent blow transverse pipes 10 is the distance between two adjacent bags 13.

[0059] The bags 13 of the bag-type dust collector are arranged at equal intervals. Therefore, in this embodiment, after one blowing transverse pipe 10 is moved above the bag 13, the other blowing transverse pipes 10 are also located above the corresponding bag 13, so that each blowing transverse pipe 10 can function.

[0060] As a possible example, in this embodiment, the spray assembly further includes a flange structure comprising a circular tube and a flange connecting the circular tube. The end of the circular tube facing away from the flange communicates with the cavity, and the flange is connected to the solenoid valve 8. The inlet end of the spray pipe 12 is located within the circular tube, forming an annular air gap between the two tubes. The inlet end of the solenoid valve 8 communicates with the annular air gap. The outlet end of the solenoid valve 8 is located inwardly of the inlet end of the spray pipe 12.

[0061] The compressed air in the cavity reaches the inlet of the electromagnetic valve 8 through the annular air gap, and then flows into the inlet of the blowing pipe 12 through the outlet of the electromagnetic valve 8. That is, the inlet and outlet of the electromagnetic valve 8 are separated by the wall surface of the blowing pipe 12.

[0062] As a possible example, in this embodiment, the blowing pipe 12 passes through the air bag 7 , the inlet of the blowing pipe 12 is located above the air bag 7 , and the outlet of the blowing pipe 12 is located below the air bag 7 .

[0063] For example, in this embodiment, the blowing pipe 12 is vertically arranged in the up and down direction, and the blowing pipe 12 is welded to the air bag 7. According to different actual needs, those skilled in the art can also choose other layout angles and connection methods of the blowing pipe 12.

[0064] As a possible example, in this embodiment, a nozzle is connected to the outlet of the spraying horizontal pipe 10. The nozzle is used to reduce the flow area of the airflow and provide a certain pre-pressure. When the pressure of the compressed air is greater than a preset value, the nozzle is opened to ensure the spraying effect.

[0065] As a possible example, in this embodiment, the lower portion of the vehicle 2 is connected to the hanging lug 6, and the upper portion of the air bag 7 is connected to the lifting lug 9. The lifting lug 9 is detachably fixedly connected to the hanging lug 6 via a fastener. It is understood that the air bag 7 and the vehicle 2 may also be connected by other means such as clamping or welding.

[0066] As a possible example, in this embodiment, the solenoid valve 8 is a submerged electromagnetic pulse valve, the air compressor 11 is an oil-free air compressor, and the controller is a PLC controller, which is mounted on the vehicle 2. The submerged electromagnetic pulse valve features a compact structure, fast response, and high-pressure resistance. The oil-free air compressor is oil-free, easy to maintain, and safe and reliable. The PLC controller features a small size, strong anti-interference capabilities, and flexible programming. Those skilled in the art may also select other types of solenoid valve 8, air compressor 11, and controller based on specific needs.

[0067] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A blowing device for a bag dust collector, characterized in that: The invention comprises a blowing assembly, wherein the blowing assembly comprises: An air bag, wherein the air bag has a cavity for containing compressed air; an air compressor for supplying air to the cavity, wherein the inlet of the air compressor is connected to the atmosphere, and the outlet of the air compressor is connected to the cavity; a solenoid valve for controlling the air injection process, wherein the inlet of the solenoid valve is connected to the cavity; a blow pipe for directing compressed air to the cloth bag, wherein the inlet of the blow pipe is connected to the outlet of the solenoid valve; A blowing transverse pipe for diverting compressed air, wherein the inlet of the blowing transverse pipe is connected to the outlet of the blowing transverse pipe, and the outlets of the blowing transverse pipe are provided in plurality and spaced apart along the length direction of the blowing transverse pipe; a controller for issuing control instructions, the controller being electrically connected to the solenoid valve; A pressure sensor is used to measure the air pressure in the cavity, and the pressure sensor is electrically connected to the controller.

2. The blowing device of the bag dust collector according to claim 1 is characterized in that: It also includes a track and a traveling vehicle; the track is used to be installed in the clean air chamber of the bag dust collector, the traveling vehicle is used to travel along the track, and the traveling vehicle is connected to the air bag; the controller is electrically connected to the motor of the traveling vehicle.

3. The blowing device of the bag dust collector according to claim 2 is characterized in that: The track is connected to a tow cable bracket, on which a tow cable is hung. The tow cables respectively supply power to the controller, the air compressor, the solenoid valve and the traveling vehicle.

4. The blowing device of the bag dust collector according to claim 3 is characterized in that: The track is connected to a Gray busbar, which is arranged along the length of the track, and the tow cable supplies power to the Gray busbar; the traveling vehicle is connected to a reading device that is matched with the Gray busbar, and the reading device is used to read the Gray busbar to obtain the position information of the traveling vehicle on the track; the tow cable supplies power to the reading device; the reading device is electrically connected to the controller to send the position information of the traveling vehicle to the controller.

5. The blowing device of the bag dust collector according to claim 4 is characterized in that: The track is an I-beam, the tow cable bracket is connected to the upper flange plate of the I-beam, and the Gray busbar is connected to the lower flange plate of the I-beam.

6. The blowing device of the bag dust collector according to claim 1, characterized in that: There are two air compressors, and the two air compressors are respectively connected to the two lateral ends of the air bag.

7. The blowing device of the bag filter according to claim 1 is characterized in that: There are multiple solenoid valves, each of which corresponds to one blowing pipe and one blowing transverse pipe; multiple outlets of one blowing transverse pipe are used to spray compressed air into the same bag, and the distance between two adjacent blowing transverse pipes is the distance between two adjacent bags.

8. The blowing device of the bag dust collector according to claim 1, characterized in that: The blowing assembly also includes a flange structure, which includes a circular tube and a flange connected to the circular tube; the end of the circular tube facing away from the flange is connected to the cavity, and the flange is connected to the solenoid valve; the inlet end of the blowing pipe is located in the circular tube, so that an annular air gap is formed between the blowing pipe and the circular tube, and the inlet of the solenoid valve is connected to the annular air gap.

9. The blowing device of the bag dust collector according to claim 1, characterized in that: The blowing pipe passes through the air bag, the inlet of the blowing pipe is located above the air bag, and the outlet of the blowing pipe is located below the air bag.

10. The blowing device of the bag dust collector according to claim 1, characterized in that: The outlet of the blowing horizontal pipe is connected with a nozzle.

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