Cloth bag detection device based on dust concentration of dust remover and detection method thereof

Abstract

The invention relates to the related technical field of air pollution prevention and control, discloses a cloth bag detection device based on dust concentration of a dust remover and a detection method thereof, and aims to solve the problem that external personnel are difficult to perceive damage of a filter bag, airflow with high dust concentration in a dust removal box sequentially passes through a cloth bag body and a first filter plate to be purified and filtered; when airflow with high dust concentration is filtered by the cloth bag body, the dust concentration can be reduced, and the airflow can directly penetrate through the first filter plate and is conveyed outwards; if the cloth bag body leaks, unfiltered high-concentration dust airflow penetrates through the cloth bag body and is filtered by the first filter plate, and when the first filter plate is blocked due to long-time filtration, the pressure of airflow input into the inner cavity of the dust removal box is increased, and the first filter plate is forced to move upwards and make contact with the first alarm switch; after the first alarm switch is started, the electric bell can make a sound, so that external personnel are warned that the cloth bag is damaged and needs to be overhauled, and finally, the effects of cloth bag leakage detection and alarm are achieved.

Description

Technical Field

[0001] This invention relates to the technical field of air pollution control, and in particular to a bag filter detection device and method based on dust concentration in a dust collector. Background Technology

[0002] As a highly efficient gas-solid separation device, the core working principle of a baghouse dust collector is to finely filter dust-laden gas using filter bags. The specific working process is as follows: Driven by a fan, dust-laden airflow is continuously transported into the dust collector. During this process, large dust particles in the airflow, due to their greater inertia or gravity, will directly break away from the airflow trajectory and fall into the ash hopper below, achieving initial gas-solid separation. Fine dust particles, however, continue to move forward with the airflow. When they pass through the filter bags, the fibrous fabric on the surface of the filter bags acts as an interceptor, adsorbing and adhering these fine dust particles to the surface of the filter bags. Over time, a dust layer gradually forms on the surface of the filter bags. As dust collection continues, the dust layer on the surface of the filter bags thickens continuously. When it accumulates to a certain level, a cleaning operation is required. At this time, high-pressure gas is injected into the filter bag through the pulse jet cleaning device, which causes the filter bag to generate a reverse airflow. This reverse airflow can effectively peel off the dust layer on the surface of the filter bag. The peeled dust falls into the ash hopper, thus completing the dust removal process and ensuring that the bag filter can operate continuously and stably.

[0003] In existing technology, patent CN212701035U discloses a pressure-relief type dust collector. This dust collector mainly includes a dust collector body, inlet duct, outlet duct, filter cartridge, pressure sensor, microcontroller, duct guide, solenoid valve, and emergency filter bag. In actual use, dust-laden air enters the dust collector body through the inlet duct, is filtered by the filter cartridge, and then clean air is discharged from the outlet duct. Simultaneously, the pressure sensor monitors the air pressure inside the dust collector body in real time. When the detected air pressure approaches a set safety threshold, the microcontroller reacts quickly, controlling the solenoid valve on the duct guide to open. At this time, some air in the dust collector body is guided into the emergency filter bag, where it is filtered again before being discharged. This emergency mechanism design can promptly relieve pressure and prevent explosions when the internal pressure of the cartridge dust collector is too high, effectively improving the safety of the cartridge dust collector.

[0004] As can be seen from the working principle of the pressure relief dust collector described above, it utilizes real-time detection of the air pressure inside the filter cartridge and uses the pressure data as a crucial basis for determining whether the filter bag is clogged. When severe clogging is detected, the system can automatically switch to emergency filter bags for filtration, thereby ensuring the continuity of dust removal operations. However, in practical applications, this design has certain limitations. When the filter bag is damaged, the airflow entering the filter bag will leak directly out from the damaged point, causing the pressure inside the filter cartridge to fail to rise. Since the pressure sensor monitors based on changes in pressure inside the filter cartridge, in this situation, external personnel cannot promptly detect the filter bag damage through changes in pressure data. This means that dust will be discharged directly without effective filtration, causing serious pollution to the atmospheric environment and posing a potential threat to the ecological environment and human health. Summary of the Invention

[0005] This invention proposes a filter bag detection device and method based on dust concentration in a dust collector, which has the functions of filter bag leakage detection and alarm, in order to solve the problem mentioned in the background art that it is difficult for external personnel to detect filter bag damage.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a bag filter detection device based on dust concentration in a dust collector, comprising: a dust collector box, wherein dust-laden airflow enters from the inlet of the dust collector box and purified airflow exits from the outlet; a partition plate, fixed in the middle of the dust collector box, with a support frame installed at its bottom to support and limit the bag body; a guide rod fixedly installed on the top of the partition plate, and a filter plate assembly capable of detecting the dust concentration in the airflow of the bag body is fitted on the guide rod, and a detection spring is fixedly connected between the filter plate assembly and the partition plate; when the bag body is damaged, the dust-laden airflow passes through the damaged part and is purified and filtered by the filter plate assembly; when the filter plate assembly is blocked, it will squeeze the alarm component, which can cause the electric bell fixed on the top of the outside of the dust collector box to sound.

[0007] Furthermore, the first type of filter plate assembly includes: a first filter plate, which has the same filter diameter as the filter bag body, and its outer side is movably fitted with the inner side of the dust collector box; the first type of alarm assembly includes: a first alarm switch, which is fixed inside the dust collector box and located above the first filter plate, and the first alarm switch activates the electric bell when pressed.

[0008] Furthermore, the second type of filter plate assembly includes: a synchronous pressure plate, movably fitted on the outer side of the guide rod, with a limiting nut threadedly connected to the top of the guide rod above the synchronous pressure plate; a connecting seat, fastened to the top of the synchronous pressure plate and located above the opening of the support frame, with a connecting ring frame fitted inside, a locking rod that is pulled outward by a locking spring installed inside the connecting ring frame, and an arc-shaped groove opened inside the connecting seat, which increases the upward resistance of the locking rod when it abuts against the arc-shaped groove; a second filter plate, fitted on the top inner side of the support frame, with one surface of the second filter plate connected to the connecting ring frame via a connecting rod; and a second alarm assembly including: a second alarm switch, fixed to the top of the partition and located below the synchronous pressure plate.

[0009] Furthermore, the connecting seat is a cylindrical shape with a through-center, and the top of the inner side of the connecting seat is provided with a concave conical slope.

[0010] Furthermore, an air tank is fixedly installed on the outside of the dust collector box, and an air jet pipe is connected to the outside of the air tank through a solenoid valve. The air jet pipe is arranged coaxially with the filter bag body.

[0011] Furthermore, a stepped block is provided on the outside of the jet pipe and above the connecting seat. A stop cylinder is fitted on the outside of the stepped block in a sealing movable sleeve. A stop spring is provided between the stepped surface of the jet pipe and the stop cylinder. A damping hole is provided on the outer stepped surface of the jet pipe. An exhaust hole is provided at the bottom end of the jet pipe, and a check valve is provided in both the exhaust hole and the inner cavity of the jet pipe.

[0012] A detection method for a bag filter detection device based on dust concentration in a dust collector includes the following steps:

[0013] S1. The dust-laden airflow is transported to the air inlet by the fan, and the dust-laden airflow enters the dust collection box for purification.

[0014] S2. After the high-concentration dust-laden airflow is purified by the filter bag body, the output pure air passes through the filter plate assembly and is finally discharged from the air outlet.

[0015] S3. If the filter bag body is damaged, the high-concentration dust-laden airflow will only be filtered by the filter plate assembly. When the filter plate assembly is blocked, it will be affected by the air pressure in the dust collector box, causing it to squeeze the alarm component. When the alarm component is compressed, the electric bell connected to it will sound, thereby alerting external personnel that the filter bag body is damaged and needs to be replaced.

[0016] The present invention has the following beneficial effects:

[0017] This invention provides a filter bag detection device and method based on dust concentration in a dust collector, aiming to detect and promptly alarm on leakage of the filter bag body through a reasonable filtration process and pressure monitoring mechanism.

[0018] In actual operation, airflow containing high concentrations of dust is introduced into the dust collector. This airflow, with its high dust concentration, is purified and filtered sequentially through the bag filter body and the first filter plate, both having the same filter diameter. When the airflow passes normally through the bag filter body, the bag filter body effectively intercepts most of the dust particles in the airflow, thereby reducing the dust concentration. After the initial filtration by the bag filter body, the dust content of the airflow has been significantly reduced. At this point, the airflow can pass smoothly directly through the first filter plate and be further transported to subsequent processing stages.

[0019] When the filter bag body leaks, a high-concentration dust flow that hasn't been effectively filtered by the bag body will pass directly through the leak. This dust-laden airflow will then reach the first filter plate. The first filter plate will then have to perform some of the filtration work that should have been done by the filter bag body, causing its filtration load to increase dramatically. Over time, as the first filter plate filters high-concentration dust flow for extended periods, dust particles will continuously accumulate on its surface and in its pores, eventually leading to blockage.

[0020] When the first filter plate becomes clogged, the airflow into the dust collector chamber is obstructed, increasing the airflow pressure. This pressure change exerts an upward force on the first filter plate, forcing it to rise against its own weight or other constraints. When the first filter plate reaches a specific position, it contacts a pre-set alarm switch. Once triggered, the internal circuitry of the alarm switch is activated, causing a loud ringing of the connected electric bell. This sound quickly attracts the attention of external personnel, serving as a warning that the filter bag may be damaged and requires timely inspection and maintenance to prevent problems such as decreased dust collection efficiency and excessive dust emissions due to filter bag leakage. Attached Figure Description

[0021] The accompanying drawings, which form part of this specification, illustrate embodiments of the invention and, together with the specification, serve to explain the principles of the invention.

[0022] The invention will be more clearly understood with reference to the accompanying drawings and the following detailed description, wherein:

[0023] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal planar cross-section of the first embodiment of the present invention;

[0025] Figure 3 for Figure 2 Enlarged structural diagram of section F in the middle;

[0026] Figure 4This is a schematic diagram of the internal three-dimensional structure of the second embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram showing the position and three-dimensional structure of each component on the partition in the second embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram showing the comparison of the external plane and internal cross-section of the bag body in the second embodiment of the present invention;

[0029] Figure 7 for Figure 6 Enlarged structural diagram of section E in the middle;

[0030] Figure 8 This is a schematic diagram of the internal three-dimensional structure of the connector in the second embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram showing the position and connection between the partition plate and the synchronous pressure plate in the second embodiment of the present invention.

[0032] In the diagram: 1. Dust collector box; 1001. Air inlet; 1002. Air outlet; 2. Air tank; 3. Air jet pipe; 300. Exhaust port; 301. Check valve; 302. Damping hole; 4. Electric bell; 5. Partition plate; 6. Support frame; 7. Bag body; 8. Guide rod; 800. Detection spring; 801. Limit nut; 9. First filter plate; 10. First alarm switch; 11. Synchronous pressure plate; 12. Connecting seat; 13. Second filter plate; 14. Connecting ring frame; 15. Locking rod; 150. Locking tension spring; 16. Second alarm switch; 17. Stop cylinder; 170. Stop tension spring. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1, please refer to Figure 1 As can be seen, the dust collector 1 can be placed in the required position by using the four corner legs. An air inlet 1001 is fixedly installed on the bottom left side of the dust collector 1 to deliver the dust-laden airflow into the inner cavity of the dust collector 1. After the dust-laden airflow is purified inside the dust collector 1, the purified air is discharged to the next process or outward according to the air outlet 1002 fixedly installed on the top right side of the dust collector 1.

[0035] in accordance with Figure 4As can be seen, a partition 5 is fixedly connected to the middle of the inner side of the dust collector 1, and a support frame 6 is bolted to the bottom of the partition 5. The support frame 6 is cylindrical cage-shaped, and there are usually multiple support frames 6, which are arranged at equal intervals. A filter bag body 7 is fastened to the outside of the support frame 6 using clamps. When the air inlet 1001 delivers the dust-laden airflow into the dust collector 1 and is located below the partition 5, the dust-laden airflow in the inner cavity of the dust collector 1 is filtered by the filter bag body 7, and the purified air is finally discharged outward from the air outlet 1002.

[0036] However, in practical applications, due to prolonged use, the fibers of the bag body 7 become damaged and weakened, eventually leading to tears. This allows unfiltered airflow to pass directly through the tear. To prevent this problem, refer to... Figure 2 and Figure 3 As can be seen, a guide rod 8 is fixedly installed on the top of the partition 5. The guide rod 8 is cylindrical in shape. Generally, there are four guide rods 8, located near the four corners of the partition 5. A first filter plate 9 is movably fitted on the outer side of the guide rod 8, and the first filter plate 9 is guided by the guide rod 8 and moves up and down reciprocally. The filter diameter of the first filter plate 9 is equal to the filter diameter of the bag body 7. Under normal conditions, the airflow filtered by the bag body 7 can pass directly through the first filter plate 9. A detection spring 800 located on the outer side of the guide rod 8 is fixedly connected between the first filter plate 9 and the partition 5. A first alarm switch 10 located above the first filter plate 9 is fixedly installed inside the dust collector 1. Under normal conditions, with the free length of the detection spring 800, the first filter plate 9 is below the first alarm switch 10. During this process, the airflow passing through the bag body 7 can pass directly through the first filter plate 9, so it will not push the first filter plate 9 upward.

[0037] However, the filter bag body 7 may rupture after prolonged operation, causing dust-laden airflow to pass directly through it without filtration. Since the first filter plate 9 and the filter bag body 7 have the same filter diameter, the first filter plate 9 can still filter the dust-laden airflow passing through the filter bag body 7, ensuring purification. However, over time, the first filter plate 9 will also become clogged due to prolonged filtration, leading to increased pressure beneath it.

[0038] As the airflow pressure increases, it pushes the first filter plate 9 upwards until it contacts the first alarm switch 10. The first alarm switch 10 is then activated, causing the connected electric bell 4 to start working. Figure 1 As shown, the electric bell 4 is fixedly installed on the top of the outside of the dust collector 1. When the electric bell 4 starts to work, it will make a continuous sound to warn outside personnel that the filter bag body 7 in the dust collector 1 has been broken and needs to be repaired and replaced.

[0039] In summary, this embodiment utilizes a dual purification process—the filter bag body 7 and the first filter plate 9—when purifying air with high dust concentrations. When the filter bag body 7 is damaged, the purification pressure on the first filter plate 9 increases, requiring all the dust-laden airflow to be purified by the first filter plate 9. When the filtration load on the first filter plate 9 increases, it triggers the first alarm switch 10 and the electric bell 4 to sound, thus alerting external personnel that maintenance is required.

[0040] Example 2 is an alternative detection scheme to Example 1. While the first filter plate 9 in Example 1 can perform secondary purification after the bag body 7 is damaged, ensuring relatively pure output air, when only one bag body 7 is damaged, dust-laden airflow will enter the area between the partition 5 and the first filter plate 9 from the damaged part. This causes the damaged part to continuously supply dust-laden airflow into this area, eventually clogging the first filter plate 9 and triggering the first alarm switch 10, thus activating the electric bell 4 alarm. In practical applications, there are multiple bag bodies 7. When one is damaged, the others can still perform normal filtration. This means that when one bag body 7 is damaged, the first filter plate 9 is forced to quickly contact the first alarm switch 10. When the electric bell 4 alarms, maintenance is required, interrupting the entire air purification process and significantly reducing its efficiency. This Example 2 aims to solve this problem by ensuring that the machine is stopped and replaced only when the number of damaged bag bodies 7 reaches a necessary replacement threshold, thereby ensuring equipment operation and reducing downtime.

[0041] from Figure 5 and Figure 9 It can be seen that the first filter plate 9 movably mounted on the guide rod 8 is replaced by the synchronous pressure plate 11, and the top of the guide rod 8 is threaded with a limiting nut 801 located above the synchronous pressure plate 11. Unlike the first embodiment, under normal conditions, the synchronous pressure plate 11 is pushed by the detection spring 800 and abuts against the limiting nut 801. The first alarm switch 10 is replaced by the second alarm switch 16, and the second alarm switch 16 is fixed on the top of the partition 5 and located below the synchronous pressure plate 11. Only when the synchronous pressure plate 11 moves down and squeezes the second alarm switch 16 can the second alarm switch 16 be turned on and the connected electric bell 4 sound.

[0042] from Figure 5 and Figure 6 It can be seen that the top of the synchronous pressure plate 11 has a connecting seat 12 that is bolted and located above the opening of the support frame 6. The number of connecting seats 12 corresponds to the number of support frames 6. Figure 6 and Figure 8As can be seen, the connecting seat 12 is a cylindrical shape with a through-center, and the top inner side of the connecting seat 12 has a concave conical slope. A second filter plate 13 is movably fitted onto the top inner side of the support frame 6. The second filter plate 13 is the same as the first filter plate 9 in Embodiment 1, and has the same filter diameter as the bag body 7, thereby enabling the detection of whether the bag body 7 is damaged. Since each support frame 6 has a corresponding second filter plate 13 installed on its top, each second filter plate 13 will also correspondingly detect the bag body 7 below it. One side of the surface of the second filter plate 13 has a connecting ring frame 14 connected by a connecting rod. The connecting ring frame 14 is annular and located above the support frame 6, and the outer side of the connecting ring frame 14 is fitted onto the inner side of the connecting seat 12. A locking rod 15 is mounted on the inner side of the connecting ring frame 14 and moves radially therefrom. A locking spring 150 connects the locking rod 15 and the inner side of the connecting ring frame 14. Pulled by the locking spring 150, the locking rod 15 is forced to always tend to move away from its center. Figure 6 and Figure 8 As shown, the inner side of the connecting seat 12 has an arc-shaped groove located at the bottom of the inclined surface. Under normal conditions, the locking rod 15 abuts against the arc-shaped groove. Utilizing the restriction of the groove, the initial upward movement of the connecting ring frame 14 requires overcoming the resistance of the locking rod 15 disengaging from the groove.

[0043] In actual operation of this embodiment 2, under normal conditions, the synchronous pressure plate 11 is pushed upward by the detection spring 800 and moves to the limit nut 801. At the same time, the locking rod 15 on the connecting ring frame 14 abuts into the arc-shaped annular groove of the connecting seat 12.

[0044] When the dust-laden airflow enters the dust collector 1, the airflow is first purified by passing through the filter bag body 7; the airflow passing through the filter bag body 7 passes directly through the second filter plate 13 and is finally discharged from the air outlet 1002.

[0045] When the filter bag body 7 is damaged, the dust-laden airflow will pass directly through the damaged area. Then, the corresponding second filter plate 13 will filter the dust-laden airflow. If the second filter plate 13 becomes clogged after prolonged filtration, the upward pressure on the second filter plate 13 will increase. When the upward force of the second filter plate 13 is sufficient to disengage the locking rod 15 from the annular groove, the locking rod 15 will move to the inner conical inclined surface of the connecting seat 12. Figure 6 As can be seen, there is a stepped surface between the top and middle of the inner side of the support frame 6. As the second filter plate 13 moves upward, it will reach the stepped surface, thus restricting its continued upward movement.

[0046] Subsequently, the locking rod 15 at this location will abut against the inner tapered inclined surface of the connecting seat 12. Since the angle between the inclined surface and the top of the connecting seat 12 is 45°, when the locking rod 15 abuts against the inclined surface, it is pulled by the elastic force of the locking spring 150, causing the connecting seat 12 to tend to move downward due to the influence of the inclined surface. However, since the elastic force of the detection spring 800 is relatively greater than the elastic force of a single locking spring 150, when only one bag body 7 is blocked, one locking rod 15 is insufficient to move the synchronous pressure plate 11 downward.

[0047] During prolonged operation, the filter bag body 7 will gradually break down. This causes more of the second filter plates 13 to push the locking rods 15 out of the arc-shaped groove. Simultaneously, more locking rods 15 press against the inclined surface of the connecting seat 12, increasing the downward force of the connecting seat 12 until the synchronous pressure plate 11 descends and compresses the detection spring 800. At this point, the bottom of the synchronous pressure plate 11 will contact the second alarm switch 16. When the second alarm switch 16 is activated, the connected electric bell 4 will sound, alerting external personnel that the filter bag body 7 needs to be inspected and replaced.

[0048] Finally, when maintenance personnel replace the bag, they only need to locate the connecting ring frame 14 that has detached from the ring groove to quickly determine the location of the damaged bag body 7.

[0049] Based on the above content, combined with Figure 1 , Figures 4-8 As can be seen, an air tank 2 is fixedly installed on the outside of the dust collector 1. The air tank 2 mainly uses an air compressor for pressurization. The outside of the air tank 2 is connected to an air jet pipe 3 via a solenoid valve, and multiple air jet pipes 3 are installed correspondingly to multiple filter bag bodies 7. Generally, the filter bag body 7 and the air jet pipe 3 are relatively coaxial. When the solenoid valve is turned on, the compressed air in the air tank 2 can be injected into the inner cavity of the filter bag body 7 through the air jet pipe 3, thereby achieving backflushing and clearing blockage of the filter bag body 7.

[0050] In practical applications, to prevent excessive back pressure in the inner cavity of the filter bag body 7 from causing the second filter plate 13 to move upwards erroneously, resulting in the locking rod 15 disengaging from the annular groove, the following measures are taken: Figures 6-8As can be seen, a stepped block is provided on the outer side of the jet pipe 3 and above the connecting seat 12. A stop cylinder 17 is fitted on the outer side of the stepped block in a sealing and movable manner. When the compressed airflow in the inner cavity of the jet pipe 3 is output, it flows into the sealing area on the outer side of the jet pipe 3 and the inner side of the stop cylinder 17, forcing the stop cylinder 17 to tend to move downward. Under normal conditions, a stop spring 170 is provided between the stepped surface of the jet pipe 3 and the stop cylinder 17. Under the elastic pull of the stop spring 170, the stop cylinder 17 always tends to move upward. In addition, a check valve 301 is provided in the inner cavity of the jet pipe 3. The check valve 301 has a one-way check function, and a damping hole 302 is opened on the outer stepped surface of the jet pipe 3. When the stop cylinder 17 moves upward, the airflow in the inner cavity of the stop cylinder 17 will slowly be discharged from the damping hole 302, reducing the upward speed of the stop cylinder 17.

[0051] When the airflow entering the jet pipe 3 enters the stop cylinder 17, it causes the stop cylinder 17 to move downwards. During this process, the outer side of the stop cylinder 17 will be positioned near the end of the locking rod 15. At this time, as the locking rod 15 moves radially and approaches the center of the connecting seat 12, its end will be blocked by the stop cylinder 17, thus restricting its disengagement from the annular groove. As the stop cylinder 17 continues to descend, it will connect with the exhaust port 300 at the bottom of the jet pipe 3, allowing air to pass through. Figure 6 As can be seen, a check valve 301 is also provided in the exhaust port 300. The check valve 301 is used to make the air in the exhaust port 300 flow into the inner cavity of the bag body 7 in one direction, so as to prevent unfiltered air from flowing upward from the exhaust port 300.

[0052] In practical applications, when backflushing and unclogging the filter bag body 7 is required, the solenoid valve connected to the jet pipe 3 is activated, causing the compressed air in the inner cavity of the jet pipe 3 to flow into the stop cylinder 17. The inner cavity of the stop cylinder 17 is pressurized and moves downward rapidly, stretching the stop spring 170. During the downward movement of the stop cylinder 17, after passing the locking rod 15, the inner cavity of the stop cylinder 17 connects with the exhaust port 300. The compressed airflow in the inner cavity of the stop cylinder 17 is then rapidly ejected into the filter bag body 7 through the exhaust port 300. The high-pressure airflow is used to achieve backflushing and unclogging of the filter bag body 7.

[0053] At the same time, the high-pressure airflow in the exhaust port 300 is injected into the inner cavity of the filter bag body 7. Even if the pressure in the inner cavity of the filter bag body 7 increases instantaneously, causing the second filter plate 13 to be pressed and tend to move upward, the upward movement of the second filter plate 13 will cause the connecting ring frame 14 to drive the locking rod 15 to move upward synchronously, and the locking rod 15 needs to disengage from the ring groove. During the process of the locking rod 15 disengaging from the ring groove, the locking rod 15 needs to move radially along the connecting seat 12, but the end of the locking rod 15 is restricted by the stop cylinder 17 and cannot move. Therefore, during the dust removal stage, the stop cylinder 17 always restricts the locking rod 15 from moving radially inward. During this process, the stop cylinder 17 is driven upward by the stop spring 170, but the air in the inner cavity of the stop cylinder 17 can only flow slowly through the damping hole 302. Therefore, during the cleaning process of the bag body 7, the stop cylinder 17 will always move to the end of the locking rod 15 to avoid the problem that the pressure inside the bag body 7 is abnormally high due to the cleaning, and the stop cylinder 17 moves upward too fast, causing the locking rod 15 to accidentally disengage from the annular groove.

Claims

1. A bag filter detection device based on dust concentration in a dust collector, characterized in that, include: Dust collector (1), dust-laden airflow enters from the air inlet (1001) of the dust collector (1), and purified airflow exits from the air outlet (1002); The partition (5) is fixed in the middle of the dust collection box (1), and a support frame (6) is installed at the bottom to support and limit the bag body (7). A guide rod (8) is fixedly installed on the top of the partition (5). A filter plate assembly capable of detecting the dust concentration of the airflow in the bag body (7) is fitted on the guide rod (8). A detection spring (800) is fixedly connected between the filter plate assembly and the partition (5). When the bag body (7) is damaged, the dust-laden airflow passes through the broken part and is purified and filtered by the filter plate assembly. When the filter plate assembly is blocked, it will squeeze the alarm component. The alarm component can make the electric bell (4) fixed on the top of the outside of the dust collector (1) sound.

2. The bag filter detection device based on dust concentration in a dust collector according to claim 1, characterized in that, The first type of filter plate assembly includes: a first filter plate (9), which has the same filter diameter as the bag body (7), and its outer side is movably fitted with the inner side of the dust collector (1); The first alarm component includes: a first alarm switch (10), which is fixed inside the dust collector (1) and located above the first filter plate (9). When the first alarm switch (10) is pressed, the electric bell (4) is turned on.

3. The bag filter detection device based on dust concentration in a dust collector according to claim 1, characterized in that, The second type of filter plate assembly includes: Synchronous pressure plate (11) is movably fitted on the outer side of guide rod (8), and the top of guide rod (8) is threaded with a limiting nut (801) located above synchronous pressure plate (11); The connecting seat (12) is fastened to the top of the synchronous pressure plate (11) and located above the opening of the support frame (6). A connecting ring frame (14) is fitted inside the connecting ring frame (14). A locking rod (15) is installed inside the connecting ring frame (14) and is pulled outward according to the locking spring (150). An arc-shaped groove is opened inside the connecting seat (12). When the locking rod (15) abuts against the arc-shaped groove, the upward resistance of the locking rod (15) can be increased. The second filter plate (13) is fitted on the inner top of the support frame (6), and one side of the surface of the second filter plate (13) is connected to the connecting ring frame (14) via a connecting rod. The second alarm component includes: The second alarm switch (16) is fixed on the top of the partition (5) and located below the synchronous pressure plate (11).

4. The bag filter detection device based on dust concentration in a dust collector according to claim 3, characterized in that, The connecting seat (12) is a cylindrical shape with a through center, and the top of the inner side of the connecting seat (12) is provided with a concave conical slope.

5. The bag filter detection device based on dust concentration in a dust collector according to claim 3, characterized in that, An air tank (2) is fixedly installed on the outside of the dust collector (1). An air jet pipe (3) is connected to the outside of the air tank (2) through a solenoid valve. The air jet pipe (3) is arranged coaxially with the filter bag body (7).

6. The bag filter detection device based on dust concentration in a dust collector according to claim 5, characterized in that, A step block is provided on the outside of the jet pipe (3) and above the connecting seat (12). A stop cylinder (17) is fitted on the outside of the step block. A stop spring (170) is provided between the step surface of the jet pipe (3) and the stop cylinder (17). A damping hole (302) is provided on the outer step surface of the jet pipe (3). An exhaust port (300) is provided at the bottom of the jet pipe (3), and a check valve (301) is provided in both the exhaust port (300) and the inner cavity of the jet pipe (3).

7. A detection method for a bag filter detection device based on dust concentration in a dust collector as described in claim 1, characterized in that, Includes the following steps: S1. The dust-laden airflow is transported to the air inlet (1001) by the fan, and the dust-laden airflow enters the dust collection box (1) for purification; S2. After the high-concentration dust-laden airflow is purified by the bag body (7), the output pure air passes through the filter plate assembly and is finally discharged from the air outlet (1002). S3. If the filter bag body (7) is damaged, the dust-laden airflow with high concentration will be filtered only by the filter plate assembly. When the filter plate assembly is blocked, it will be affected by the air pressure in the dust collector box (1), causing it to squeeze the alarm component. After the alarm component is compressed, the electric bell (4) connected to it will make a sound, thereby alerting external personnel that the filter bag body (7) is damaged and needs to be replaced.

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