Woodworking central dust remover

Abstract

The invention relates to the field of dust removal, and discloses a woodworking central dust remover which comprises a dust remover body, a filter assembly and a dust removal assembly arranged in a filter bag, a dust removal cavity and a dust suction cavity are formed in the dust remover body, an air chamber valve is arranged between the dust removal cavity and the dust suction cavity, the air chamber valve separates the two cavities, an air inlet is formed in the side wall of the dust removal cavity, and an air outlet is formed in the side wall of the dust suction cavity; the linkage ash removal mechanism is constructed by arranging the supporting rods capable of expanding in the radial direction in the filter bag and the tightening ring connected to the bottom. The multiple supporting rods synchronously expand outwards under the action of high-pressure airflow to drive the tightening ring to be screwed, so that the filter bag structure is expanded and twisted to form a composite disturbance area covering the inner wall and the bottom, the dust attachment state is effectively destroyed, and the filter bag structure is particularly suitable for cleaning the bottom, wrinkles and other traditional areas difficult to clean.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dust removal, in particular to a woodworking central dust collector. BACKGROUND

[0002] In the woodworking processing process, a large amount of wood chips and fine dust will continue to be generated due to frequent cutting, polishing and other operations. If not collected and treated in time, it will not only seriously pollute the production environment, but also may cause long-term harm to the respiratory system of the operator. Therefore, the woodworking industry generally configures a central dust removal system, among which the bag type central dust collector is widely used because of its simple structure, high filtration efficiency and wide application range.

[0003] The existing bag type central dust collector usually filters the dust-containing gas through the filter bag, and realizes gas-solid separation by relying on the pore structure of the filter material to intercept the wood chips and dust on the outer surface of the filter bag. With the extension of the running time, the dust accumulates on the surface of the filter bag and gradually forms a dust layer. If not cleaned in time, it is easy to cause the filter bag resistance to increase and the air volume to decrease, thereby affecting the overall dust removal efficiency, and even causing problems such as filter bag damage and abnormal equipment operation.

[0004] In order to improve the dust cleaning effect of the filter bag, the existing technology mainly adopts two kinds of ways of mechanical vibration dust cleaning and airflow backflushing dust cleaning. However, both of these two ways have the problems of single structure, obvious dust cleaning blind area and incomplete dust cleaning, which are difficult to meet the high-efficiency dust cleaning requirements under actual complex working conditions.

[0005] Specifically, the mechanical vibration dust cleaning device is usually arranged on the outside of the filter bag, and relies on periodic vibration to drive the local shaking of the filter bag to peel off the dust. However, due to the limited vibration force acting points, such as the bottom of the filter bag, the folds, the corners and other positions, the dust cleaning difficulty in these areas is greater due to the structural shape or airflow distribution problems.

[0006] The airflow backflushing dust cleaning device releases a short reverse airflow through a high-pressure gas source, trying to use the pneumatic impact force to make the dust separate from the surface of the filter bag. However, this way has the problems of limited propagation distance of the impact airflow and fast decay of the pulse energy, especially in the bottom and fold areas of the filter bag, it is difficult to form effective flushing, resulting in local dust cleaning dead angle.

[0007] Therefore, the existing vibration type dust cleaning and airflow backflushing type dust cleaning both have the technical defects of incomplete dust cleaning, difficulty in effectively treating the bottom of the filter bag and low dust cleaning efficiency, which are still difficult to meet the actual needs of high-efficiency and all-round dust cleaning in the woodworking processing process. SUMMARY

[0008] In view of the deficiencies of the prior art, the present application provides a woodworking central dust collector, which aims to at least alleviate the above problems to some extent.

[0009] The above technical purpose of the present application is realized by the following technical scheme: A woodworking central dust collector comprises a dust collector body, a filter assembly and a dust cleaning assembly arranged in a filter bag. A dust removal cavity and a dust suction cavity are formed in the dust collector body, and a gas chamber valve is arranged between the two cavities, which separates the two cavities, a gas inlet is arranged on the side wall of the dust removal cavity, and a gas outlet is arranged on the side wall of the dust suction cavity. The filter assembly is arranged in the dust removal cavity, and the filter assembly comprises a filter support connected to the dust removal cavity, a plurality of connecting plates are connected to the filter support, and the filter bag is fixed to the connecting plates. The dust cleaning assembly comprises a plurality of supporting rods arranged on the connecting plates, the bottom of the supporting rod is provided with a taut ring, the supporting rod can rotate the taut ring when sliding on the connecting plate, and the taut ring is fixed with the filter bag. It also comprises an air inlet assembly and a settling cavity arranged at the bottom of the dust collector body, the settling cavity is communicated with the dust removal cavity, the air inlet assembly is arranged in the dust suction cavity, and the air in the dust removal cavity is extracted.

[0010] Preferably, the gas chamber valve comprises a plugging frame fixed between the dust removal cavity and the dust suction cavity, a closing plate is rotatably connected to the plugging frame, a motor a is connected to the plugging frame, and the driving shaft of the motor a is fixed with the rotating shaft of the closing plate.

[0011] Preferably, the air inlet assembly comprises a connecting frame connected to the dust suction cavity, a suction fan is connected to the connecting frame, and the air inlet of the suction fan is directed towards the gas chamber valve through the connecting frame. A partition plate is connected to the side wall of the dust removal cavity, an air inlet channel is formed between the partition plate and the filter support, a settling chamber is formed between the partition plate and the dust removal cavity, and the air inlet is communicated with the dust removal cavity through the settling chamber.

[0012] Preferably, the bottom of the settling cavity is provided with a conveying mechanism for conveying wood chips in the settling cavity and the outside. The conveying mechanism comprises a conveying cavity communicated with the bottom of the settling cavity, a conveying shaft is rotatably connected in the conveying cavity, a plurality of fins are arranged on the outer portion of the conveying shaft, a motor b is connected to the conveying cavity, the driving shaft of the motor b is connected with the conveying shaft, and a material falling port is arranged at the bottom of the conveying cavity.

[0013] Preferably, the dust cleaning assembly further comprises an air pump arranged on the dust collector body, the air outlet end of the air pump is communicated with the filter bag, when the air pump supplies air to the filter bag, the dust cleaning assembly can synchronously move a plurality of supporting rods, and the supporting rods move away from the axis of the filter bag. The dust removal cavity is connected with a conveying frame, the conveying frame is hollow, is located at the upper portion of the filter support, the air outlet end of the air pump is communicated with the conveying frame, a gas inlet pipe is communicated with the conveying frame, and an air inlet pipe a is communicated with the gas inlet pipe.

[0014] Preferably, the ash removal assembly further comprises a sliding ring slidingly connected to the connecting plate, a connecting rod is rotatably connected to the bottom of the sliding ring, a fixed shaft is fixed to the bottom of the connecting plate, the connecting rod is slidingly connected to the fixed shaft, and the supporting rod is rotatably connected to the bottom of the connecting rod.

[0015] Preferably, the ash removal assembly further comprises an air inlet pipe b fixed to the sliding ring, the air inlet pipe b is sleeved at the bottom of the air inlet pipe a, a pressure cavity is formed between the bottom of the air inlet pipe a and the air inlet pipe b, the bottom of the air inlet pipe a is provided with a pressure port communicated with the pressure cavity, a spring b is connected between the air inlet pipe a and the air inlet pipe b, a jet port a is formed in the side wall of the air inlet pipe a, a communicating port is formed in the inner wall of the air inlet pipe b, a jet port b communicated with the filter bag is formed in the bottom of the communicating port, and the height of the jet port a is lower than that of the communicating port.

[0016] Preferably, a connecting rod is rotatably connected to the bottom of the supporting rod, and the other end of the connecting rod is rotatably connected to the side wall of the tightening ring.

[0017] Preferably, a plurality of penetrating ports are formed in the bottom of the tightening ring, a stabilizing ring is arranged at the bottom of the filter bag, a plurality of tapered insertion rods corresponding to the penetrating ports are connected to the top of the stabilizing ring, the tapered insertion rods pass through the bottom of the filter bag and are sleeved in the penetrating ports, a fastening bolt is threadedly connected to the stabilizing ring, and the fastening bolt is threadedly connected with the tightening ring through the filter bag.

[0018] Preferably, a threaded pipe is arranged on the connecting plate, a connecting ring threadedly matched with the threaded pipe is fixed to the top of the filter bag, the threaded pipe is slidingly connected to the connecting plate, and a spring c is arranged between the connecting plate and the threaded pipe.

[0019] In summary, the present application mainly has the following advantages: The present application sets up a linkage ash removal mechanism by arranging the radially expandable supporting rods and the tightening ring connected to the bottom in the filter bag. The plurality of supporting rods are synchronously expanded under the action of high-pressure gas flow, drive the tightening ring to rotate, make the filter bag structure to bulge and twist, form a composite disturbance area covering the inner wall and the bottom, effectively destroy the dust adhesion state, and is especially suitable for cleaning the bottom and the traditional difficult-to-clean area such as wrinkles.

[0020] The application utilizes several supporting rods and tightening rings to cooperate with the high-pressure gas flow injected in the axial direction to form a continuous dust cleaning process from dust loosening to carrying away, thereby improving the dust cleaning efficiency and reducing the filter bag resistance. The cooperative mechanism can effectively solve the problems of incomplete cleaning, difficult bottom cleaning and low efficiency existing in the current vibration or back blowing type dust cleaning, and meets the actual needs of wood processing for efficient and full coverage dust cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the application; Figure 2 is a front view schematic diagram of the overall structure of the application; Figure 3 is Figure 2 is a sectional view schematic diagram of the A-A direction in the application; Figure 4 is Figure 2 is a sectional view schematic diagram of the B-B direction in the application; Figure 5 is a schematic diagram of the air chamber valve structure of the application; Figure 6 is a schematic diagram of the settling chamber structure of the application; Figure 7 is a schematic diagram of the conveying frame and filter support structure of the application; Figure 8 is a sectional view schematic diagram of the filter bag structure of the application; Figure 9 is Figure 8 is an enlarged schematic diagram of the local structure at a in the application; Figure 10 is Figure 8 is an enlarged schematic diagram of the local structure at b in the application; Figure 11 is a schematic diagram of the tightening ring structure of the application; Figure 12 is a schematic diagram of the conveying mechanism structure of the application.

[0022] Reference signs: 100, dust cleaner body; 101, dust removal chamber; 102, dust suction chamber; 103, air inlet; 104, air outlet; 105, filter support; 106, connecting plate; 107, supporting rod; 108, tightening ring; 109, settling chamber; 110, filter bag; 111, air pump; 112, partition plate; 113, settling chamber; 200, blocking frame; 201, closing plate; 202, motor a; 203, connecting frame; 204, exhaust fan; 205, conveying chamber; 206, conveying shaft; 207, dragon; 208, motor b; 209, material falling port; 300, conveying frame; 301, gas conveying pipe; 302, air inlet pipe a; 303, sliding ring; 304, connecting rod; 305, fixed shaft; 306, spring a; 307, air inlet pipe b; 308, pressure chamber; 309, pressure port; 310, spring b; 311, injection port a; 312, communication port; 313, injection port b; 400, connecting rod; 401, insertion port; 402, stabilizing ring; 403, tapered insertion rod; 404, fastening bolt; 405, threaded pipe; 406, connecting ring; 407, spring c. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, those skilled in the art can make further embodiments without creative efforts, which all belong to the protection scope of the present application.

[0024] Reference Figures 1-12 The embodiment provides a woodworking central dust collector, which has the structure including a dust collector body 100, a filter assembly, a dust cleaning assembly, an air inlet assembly and a sedimentation cavity 109.

[0025] The internal structure of the dust collector body 100 is divided into two chambers, a dust removal cavity 101 and a dust suction cavity 102, which are separated from each other by setting a gas chamber valve. The sidewall of the dust removal cavity 101 is provided with an air inlet 103 for connecting external dust-containing gas; the sidewall of the dust suction cavity 102 is provided with an air outlet 104 connected to a negative pressure exhaust system for discharging clean gas filtered by the filter bag 110.

[0026] The filter assembly is installed in the dust removal cavity 101, which includes a filter support 105 fixed in the dust removal cavity 101, and a plurality of connecting plates 106 uniformly arranged on the filter support 105. Each connecting plate 106 is provided with a filter bag 110, and the filter bag 110 extends vertically downward, which is stable in structure and forms a plurality of parallel filter paths. The connecting plate 106 not only serves to install the filter bag 110, but also constitutes a functional sealing structure, so that the dust-containing gas must pass through the filter bag 110 before entering the dust suction cavity 102, thereby avoiding the dust-containing gas bypassing the filter bag 110 and being directly discharged.

[0027] The ash cleaning assembly of the embodiment has a plurality of assemblies arranged inside each filter bag 110, which includes a plurality of support rods 107 mounted on the connecting plate 106 and capable of sliding on the connecting plate 106 in the radial direction, and arranged circumferentially on the inner circumferential surface of the filter bag 110. The bottoms of the plurality of support rods 107 are jointly connected to a taut ring 108, which is fixed to the bottom of the filter bag 110. When the support rods 107 rotate and slide along the connecting plate 106 and the taut ring 108, the filter bag 110 locally changes in structure and tension.

[0028] To achieve the effect of synchronous ash cleaning, the ash cleaning assembly further includes an air pump 111 arranged on the dust collector body 100. The air outlet end of the air pump 111 is in communication with each filter bag 110, and can inject a high-pressure air flow into the inside of the filter bag 110 during the ash cleaning period to achieve instantaneous impact. The air flow not only enhances the peeling force of the dust on the surface of the filter bag 110, but also drives the support rods 107 to slide away from the central axis of the filter bag 110 during the impact process, thereby achieving the coupling effect of air flow ash cleaning and physical deformation ash cleaning.

[0029] In addition, the bottom of the dust collector body 100 is provided with a settling chamber 109, which is in communication with the dust removal chamber 101 and is used to collect the dust shaken off by the filter bag 110. The bottom of the settling chamber 109 is provided with a conveying mechanism for conveying the deposited wood chips and dust to an external storage tank or a garbage collection device. The sidewall of the dust removal chamber 101 is connected to a partition plate 112, which forms an air inlet passage between the filter support 105 and the dust removal chamber 101, and forms a settling chamber 113 between the partition plate 112 and the dust removal chamber 101. The air inlet 103 is in communication with the dust removal chamber 101 through the settling chamber 113.

[0030] The air inlet assembly is arranged in the dust suction chamber 102, and is used to form a stable negative pressure environment in the dust removal chamber 101. External dust-containing gas can be sucked into the dust removal chamber 101 through the air inlet 103, the settling chamber 113, and the air inlet passage, and flow to the filter bag 110.

[0031] The wood central dust collector provided by the embodiment, in work, the air inlet assembly is first started, the air inlet assembly is arranged in the dust collection cavity 102, the air in the dust collection cavity 102 is continuously extracted by the exhaust fan 204, a stable negative pressure environment is formed in the dust collection cavity 102, and then the air pressure in the dust collection cavity 101 is driven to be reduced, and a whole negative pressure driving system is formed. Under the action of negative pressure, the external dust-containing gas enters the dust collection cavity 101 from the air inlet 103 of the side wall of the dust collector body 100, and first enters the settling chamber 113 formed by the partition plate 112 in the dust collection cavity 101. The settling chamber 113 plays a role of airflow buffering and staged sedimentation, so that large-particle dust is settled to the lower settling cavity 109 under the action of gravity, and small-particle dust enters the inside of the dust collection cavity 101 along the air inlet passage between the partition plate 112 and the filter support 105, flows along the set path, and enters the subsequent filtering link.

[0032] After the dust-containing gas enters the dust collection cavity 101, it flows to the filter assembly under the action of negative pressure. Since the filter bag 110 is fixed on the connecting plate 106, and the connecting plate 106 constitutes a sealing structure between the dust collection cavity 101 and the dust collection cavity 102, the airflow can only pass through the filter bag 110 to complete gas-solid separation, and cannot bypass the filter bag 110 to directly enter the dust collection cavity 102. The structure ensures the filtering integrity of the system, effectively improves the dust removal efficiency and air quality.

[0033] The dust-containing gas forms a dust layer on the inner wall of the filter bag 110, and the purified gas passes through the filter bag 110 into the dust collection cavity 102 and is discharged to the outside through the air outlet 104. With the passage of time, the filter bag 110 continuously accumulates wood chips and dust on the outer surface, the resistance of the filter bag 110 gradually increases, and the pressure difference in the system increases.

[0034] In specific application, a differential pressure detection sensor can be selected to be arranged to monitor the pressure difference state between the dust collection cavity 101 and the dust collection cavity 102 in real time, and the ash removal assembly can also be started regularly.

[0035] First, the air inlet assembly is closed, the communication between the dust collection cavity 101 and the dust-containing gas outside is stopped, and the air chamber valve is driven to be closed to cut off the communication between the dust collection cavity 101 and the dust collection cavity 102. The dust-containing gas can be prevented from continuing to enter the filter bag 110 and interfering with the ash removal process, so that the ash removal action is independent, stable and effective. Subsequently, the air pump 111 arranged on the dust collector body 100 sprays high-pressure airflow into the filter bag 110, generates instantaneous pneumatic impact, and peels off the attached dust. The process can quickly loosen the surface dust of the filter bag 110, and can also avoid energy waste caused by long-time operation, and has the technical effect of rapid ash removal response.

[0036] At the same time, the plurality of support rods 107 inside the filter bag 110 can expand outward along the radial direction of the connecting plate 106 under the action of high-pressure and high-speed airflow impact. The bottom ends of the plurality of support rods 107 are connected to a taut ring 108, and the taut ring 108 is fixed to the bottom of the filter bag 110. When the support rods 107 expand outward, the taut ring 108 is forced to rotate under the action of force. The structure linkage of “radial expansion” driving “bottom rotation” causes complex composite disturbance of the bottom and inner wall of the filter bag 110, forming an efficient spiral dust removal deformation mechanism.

[0037] The “twist” of the taut ring 108 can form an asymmetric torsion under the traction of the simultaneous outward expansion of the plurality of support rods 107. This forced deformation can cause the circumferential displacement of the bottom area of the filter bag 110 and change the wall tension distribution. At the same time, the outward expansion of the support rods 107 causes the entire filter bag 110 to expand tightly in the radial direction, forming a stable pressure. The superposition of the two deformations forms a stress area with “twist + inflation” in the inside of the filter bag 110, which has a significant gain effect on the shearing, crushing and shaking off of the dust layer.

[0038] While the support rods 107 move and the taut ring 108 rotates to deform the structure of the filter bag 110, high-speed and high-pressure airflow is injected axially inside the filter bag 110. At this time, the high-pressure airflow is injected into the inside of the filter bag 110 by the air pump 111 and is injected axially along the filter bag 110 from top to bottom. In the area where the inner wall of the filter bag 110 has been twisted and tensioned, the dust adhesion state is destroyed, and the airflow is more likely to carry away the loose dust when passing through these areas. In this embodiment, the dust is loosened by structure deformation first, and then removed by airflow, so the shedding efficiency is much higher than that of the conventional back blowing process.

[0039] Finally, the cleaned dust falls under the action of gravity and settles in the settling chamber 109 at the bottom of the dust collector, which is in communication with the dust removal chamber 101 to form a natural dust falling channel. The bottom of the settling chamber 109 is provided with a conveying mechanism, which can periodically or continuously convey the sawdust and dust out of the device to prevent secondary dust raising and improve the dust removal efficiency and environmental protection performance of the system.

[0040] In summary, in the dust removal process of the present embodiment, the plurality of support rods 107 expand radially synchronously, driving the taut ring 108 fixed to the bottom of the filter bag 110 to rotate, and the structure of the filter bag 110 thus produces a composite deformation of “bulging + twisting”, which covers the side wall and bottom area. Then, high-pressure airflow is injected axially inside the filter bag 110, although the main path does not change, but the dust on the inner wall of the filter bag 110 has been loosened by the structural disturbance at this time, and the airflow can more effectively flush and carry away the dust. The structural disturbance and airflow dust removal cooperate to realize a continuous process from loosening to peeling, which improves the dust removal efficiency compared with the prior art.

[0041] In the embodiment, the air chamber valve is arranged between the dust removal cavity 101 and the dust suction cavity 102 in the dust collector body 100, and is used for controlling the air flow between the two cavities.

[0042] The air chamber valve comprises a blocking frame 200 fixedly installed in the interior of the dust collector body 100. The blocking frame 200 is in a rectangular frame structure, is fittedly installed on the middle passage connecting the dust removal cavity 101 and the dust suction cavity 102, and the outer edge is fixed to the inner wall of the body by a bolt fastening mode.

[0043] A closing plate 201 is hingedly connected to the middle part of the blocking frame 200, can be rotated to open and close through a rotating shaft, and is in sealing fit with the blocking frame 200 when rotated to a closed position, so as to completely block the air flow between the dust removal cavity 101 and the dust suction cavity 102.

[0044] In order to realize automatic opening and closing control, a motor a 202 is fixedly installed on the mounting seat. The motor a 202 is a low-speed high-torque electric actuator, and the output shaft is coaxially connected with the rotating shaft of the closing plate 201.

[0045] Through the above arrangement, during the normal operation of the dust collector, the closing plate 201 is in an open state. At this time, the dust removal cavity 101 and the dust suction cavity 102 are kept in communication, and the dust-containing gas can enter the dust removal cavity 101 under the action of negative pressure, and then enter the dust suction cavity 102 after passing through the filter bag 110 and is discharged.

[0046] When the pressure difference is detected to rise to reach a set dust cleaning threshold value, or enters a preset dust cleaning period, the motor a 202 is started to drive the closing plate 201 to rotate to a closed position, and the closing frame reliably blocks the passage between the dust removal cavity 101 and the dust suction cavity 102. The closing action has two important technical effects: on the one hand, it can avoid the dust-containing gas from continuously entering the filter bag 110 during the dust cleaning process, prevent the air flow from interfering with the dust cleaning disturbance, and ensure the stability and effectiveness of the dust cleaning process; on the other hand, after the air chamber valve is closed, an independent chamber space is formed, which is helpful to maintain the impact strength of the high-pressure air flow and improve the air flow utilization rate.

[0047] After the dust cleaning is completed, the motor a 202 reversely drives the closing plate 201 to rotate to an open state, restores the communication state of the dust removal cavity 101 and the dust suction cavity 102, and the device reenters the normal filtering operation.

[0048] In the embodiment, the air inlet assembly is arranged in the dust suction cavity 102, and is used for continuously extracting air to form a negative pressure in the dust removal cavity 101, guide the external dust-containing gas to flow into the dust removal cavity 101, and complete the gas-solid separation through the filter bag 110.

[0049] Specifically, the air inlet assembly includes a connecting frame 203 fixedly installed on the upper inner wall of the dust collection cavity 102 and firmly connected to the dust collector body 100 by screws. A suction fan 204 is installed on the connecting frame 203. The suction fan 204 is a centrifugal negative pressure fan with stable airflow suction capacity and can provide continuous and constant suction driving force.

[0050] The air inlet of the suction fan 204 is arranged towards the air chamber valve through the connecting frame 203, and the suction direction corresponds to the airflow passage for directly sucking clean gas after passing through the filter bag 110. The air outlet of the fan is communicated with the air outlet 104 and can be connected to an external exhaust passage or a dust removal main pipeline to realize orderly discharge of the purified air.

[0051] Through the above arrangement, during normal operation of the equipment, the suction fan 204 is started to continuously reduce the air pressure in the dust collection cavity 102 and drive the dust removal cavity 101 to form a stable negative pressure area, thereby guiding the external dust-containing gas to enter the settling chamber 113 through the air inlet 103 formed in the side wall of the dust collector body 100. The settling chamber 113 is jointly surrounded by the partition plate 112 arranged in the dust removal cavity 101 and the filter support 105 to buffer the airflow velocity in the internal space and realize preliminary separation. In this area, large particles of dust are preferentially settled due to gravity and fall into the settling cavity 109 below the partition plate for centralized collection, and small particles of dust enter the dust removal cavity 101 along the air inlet passage formed between the partition plate 112 and the filter support 105.

[0052] The small particles of dust entering the dust removal cavity 101 are guided to the filter assembly under the negative pressure driving. Since the air chamber valve is in an open state, the dust-containing airflow can only pass through the filter bag 110 to enter the dust collection cavity 102 to realize forced gas-solid separation. This design not only ensures the uniqueness of the filtration path and avoids the bypass of dust-containing gas into the dust collection cavity 102, but also significantly improves the overall dust removal efficiency of the system through multi-stage separation.

[0053] The air inlet of the suction fan 204 is arranged towards the air chamber valve, which helps to improve the suction efficiency at the outlet of the filter bag 110, reduce resistance loss, enhance the air velocity after passing through the filter bag 110, and thus improve the filtration efficiency and the overall air volume response speed of the system.

[0054] In addition, to adapt to the operating conditions under different operation loads, the device is configured with multiple groups of suction fans 204. In the case that the operation rates of customer processing workshops are inconsistent, the corresponding number of fans need to be started and stopped, which can significantly reduce the energy consumption level and realize energy-efficient operation.

[0055] In addition, to adapt to the operation conditions under different workloads, the device is provided with multiple groups of air extraction fans 204. In the case of inconsistent operation rates of customer processing workshops, the corresponding number of fans need to be started and stopped, which can significantly reduce energy consumption and achieve energy-efficient operation.

[0056] Specifically, in the customer processing workshop, due to the differences in the operation rates of different production lines and different equipment, the amount of negative pressure air extraction required by each region is also different. In view of this characteristic, the number of fans can be adjusted according to the actual situation to adjust the flow and pressure, and the number and operating power of each group of fans can be flexibly adjusted.

[0057] When part of the production line is suspended or operates at low load, the system can automatically turn off part of the air extraction fan, and only keep the minimum configuration required to meet the current air extraction and negative pressure demand, thereby avoiding the energy waste caused by full-load operation of the whole system. At the same time, when the production load increases, a new process or high-dust equipment is started, the number of additional fans can be re-enabled to ensure that the dust removal efficiency does not decrease.

[0058] This multi-fan grouping control design not only significantly reduces the overall operating energy consumption of the equipment, but also reduces the running time and wear frequency of each fan, prolongs the service life of the fan and related components, and reduces the equipment maintenance and replacement costs. For large woodworking processing workshops and other multi-line, distributed, high-energy industrial scenes, the multi-fan control mechanism not only brings considerable energy-saving effect, but also improves the adaptive ability and intelligent level of the equipment, and can better meet the dual needs of customers for stable dust removal effect and economic operation under different production rhythms and order fluctuations.

[0059] In this embodiment, to realize the automatic cleaning and discharge of settled dust, the dust collector body 100 is provided with a conveying mechanism at the bottom for directional conveying of wood chips, dust and other solid materials collected in the settling chamber 109 to an external collection device.

[0060] Specifically, the conveying mechanism includes a conveying chamber 205 in communication with the bottom of the settling chamber 109, which adopts a closed metal cylinder structure to define the conveying path and avoid secondary dust raising. A conveying shaft 206 is arranged inside the conveying chamber 205 along the axial direction, and the conveying shaft 206 is rotatably connected to the inside of the conveying chamber 205 through two end bearing supports and penetrates through the entire conveying path.

[0061] To realize material pushing, a spiral-shaped propeller 207 structure is arranged on the outside of the conveying shaft 206, and the propeller 207 is fixedly connected with the conveying shaft 206 and rotates synchronously with the shaft. One end of the conveying chamber 205 is provided with a motor b 208, and the driving shaft of the motor b 208 is connected with the conveying shaft 206 through a shaft coupling. The motor b 208 can drive the conveying shaft 206 to rotate after being powered on, so as to drive the propeller 207 to gradually push the deposits out along the direction of the conveying chamber 205.

[0062] In addition, the bottom of the conveying cavity 205 is provided with a discharging port 209, which is arranged at the lower part of the conveying end and can be connected to a collecting barrel, a storage box or a garbage recycling system to realize automatic discharging.

[0063] Through the above arrangement, when the dust collector is running, the wood dust falling from the filter bag 110 can be deposited in the bottom of the settling chamber 109 under the action of gravity. The settling chamber 109 is connected with the conveying cavity 205, and the accumulated dust will naturally gather to the inlet position of the conveying cavity 205. At this time, the motor b208 drives the conveying shaft 206 to rotate, and the external Long 207 structure continuously pushes the dust along the conveying cavity 205, and finally discharges it to the external collecting unit through the discharging port 209.

[0064] In this embodiment, in order to realize unified air supply for multiple filter bags 110, a conveying frame 300 is arranged in the dust removal chamber 101. The conveying frame 300 is a hollow structure, arranged horizontally above the filter support 105, and corresponds to the positions of multiple filter bags 110. Its two ends are fixed to the inner wall of the dust collector body 100 through support members.

[0065] The gas outlet of the gas pump 111 is connected to the conveying frame 300 through a pipeline. The conveying frame 300 serves as the main gas distribution channel, and uniformly conveys high-pressure gas to each filter bag 110 position when the dust cleaning is started. In order to accurately guide the gas to each filter bag 110, a plurality of interfaces are arranged on the conveying frame 300, which are respectively connected to a plurality of gas supply pipes 301.

[0066] The end of the gas supply pipe 301 is provided with an air inlet pipe a302, which is opened towards the inside of the corresponding filter bag 110 and has a short pipe type jet structure.

[0067] Through the above arrangement, before the dust cleaning period starts, first, the air chamber valve is closed to cut off the communication between the dust removal chamber 101 and the dust suction chamber 102, and the air inlet assembly is stopped to ensure that the dust cleaning process is not disturbed by external dust-containing gas. Then, the gas pump 111 is started, and the output high-pressure gas enters the plurality of gas supply pipes 301 through the conveying frame 300, and is injected into the inside of the filter bag 110 through the air inlet pipe a302.

[0068] Since the conveying frame 300 is located above the filter support 105 and covers all the positions of the filter bags 110, it can realize synchronous air supply to all the filter bags 110. Through the directional injection of the air inlet pipe a302, the gas flow can penetrate along the axis of the filter bag 110, forming a short shock wave and causing significant peeling of the dust layer on the inner wall of the filter bag 110. Combined with the structural deformation disturbance caused by the supporting rod 107 and the tension ring 108, the high-pressure gas flow has stronger penetration and dust cleaning efficiency.

[0069] In addition, the air pump 111 arranged can also adopt a pulse air supply mode during operation, and the short-time impact is realized by intermittent release of high-pressure airflow, so as to further enhance the stripping effect on the dust in the filter bag 110. The air pump 111 sprays high-pressure gas into the filter bag 110 in a pulse mode, and the filter bag 110 can be subjected to multiple short-time high-pressure impacts in the dust cleaning period. At the same time of each airflow pulse action, the plurality of supporting rods 107 can be synchronously expanded radially, the supporting rods 107 move away from the axis of the filter bag 110, and the bottom tightening ring 108 is twisted to make the filter bag 110 structure locally bulge and twist, so that the filter bag 110 repeatedly cleans dust under multiple disturbance rhythms, and the dust detachment probability is improved.

[0070] In the embodiment, the dust cleaning assembly further comprises a transmission mechanism for linkage driving the supporting rods 107 to act, which is arranged at the connecting plate 106 at the upper part of the filter bag 110, and specifically comprises a sliding ring 303, a connecting rod 304, a fixed shaft 305, and a spring a 306.

[0071] The sliding ring 303 is a ring-shaped member, which is slidably connected to the connecting plate 106 and can move up and down in the vertical direction on the connecting plate 106. The bottom of the sliding ring 303 is rotationally connected to the upper end of a plurality of connecting rods 304 through a rotating shaft, and the other end of each connecting rod 304 is slidably connected to the fixed shaft 305 fixedly arranged at the bottom of the connecting plate 106, that is, a slidable pair connection is formed between the connecting rod 304 and the fixed shaft 305, so that the connecting rod 304 can swing within a certain range.

[0072] The upper end of the supporting rod 107 is rotationally connected to the bottom of the connecting rod 304, and the spring a 306 is fixed between the sliding ring 303 and the connecting plate 106, and is used to provide a restoring force when the sliding ring 303 moves.

[0073] Through the above arrangement, when the dust cleaning action is started, the air pump 111 sprays high-pressure gas into the inside of the filter bag 110 through the conveying frame 300 to form an axial airflow impact, and at this time, the sliding ring 303 moves downward.

[0074] During the downward movement of the sliding ring 303, the connecting rod 304 is caused to slide around the fixed shaft 305 and apply a deflection force to the supporting rod 107, and the supporting rod 107 expands radially towards the inner wall of the filter bag 110 under the thrust of the connecting rod 304, so that the side wall of the filter bag 110 is deformed. The structure can realize rhythm synchronization of the dust cleaning action when cooperating with the pulse air supply work of the air pump 111. The sliding ring 303 moves once for each airflow pulse trigger, and the supporting rod 107 expands and disturbs once, so that repeated deformation intervention in multiple short-time dust cleaning processes is realized, and the multiple and rhythm control ability of the dust cleaning action is enhanced.

[0075] In the embodiment, the ash cleaning assembly further comprises a set of air injection disturbance mechanism based on air pressure linkage control, for realizing automatic triggering of ash cleaning action. The mechanism comprises air inlet pipe a 302, air inlet pipe b 307 and the pneumatic pressure structure formed thereby.

[0076] The air inlet pipe a 302 is arranged on the conveying frame 300 through the air conveying pipe 301, the bottom thereof is arranged towards the filter bag 110, and a plurality of injection ports a 311 are formed in the side wall, for injecting high-pressure gas into the inside of the filter bag 110. The air inlet pipe b 307 is sleeved on the bottom of the air inlet pipe a 302 and is fixedly connected to the sliding ring 303, the inner wall of the air inlet pipe b 307 is provided with a communication port 312, and the bottom of the communication port 312 is provided with an injection port b 313, which is directed towards the inside of the filter bag 110.

[0077] A pressure cavity 308 is formed between the bottom of the air inlet pipe a 302 and the air inlet pipe b 307, and the pressure cavity 308 is communicated with the gas source through the pressure port 309 formed in the bottom of the air inlet pipe a 302. A compression elastic member, i.e. spring b 310, is further arranged between the air inlet pipe a 302 and the air inlet pipe b 307, for controlling the position rebound of the air inlet pipe b 307. The height of the injection port a 311 is lower than the position of the communication port 312.

[0078] Through the above arrangement, in the ash cleaning process, high-pressure gas is output by the air pump 111, sequentially enters the inside of the air inlet pipe a 302 through the conveying frame 300 and the air conveying pipe 301, and the air pressure in the air inlet pipe a 302 rapidly rises with the continuous injection of the gas. At this time, the pressure port 309 formed in the bottom of the air inlet pipe a 302 guides the gas to the pressure cavity 308 formed between the air inlet pipe a 302 and the air inlet pipe b 307, so that the gas pressure in the pressure cavity 308 rapidly accumulates.

[0079] Under the pushing of the air pressure in the pressure cavity 308, the air inlet pipe b 307 overcomes the initial elastic force of the spring b 310 and starts to move downward, while driving the sliding ring 303 fixed thereon to move downward as a whole. In the process of the sliding ring 303 moving downward, the driving connecting rod 304 generates sliding and swinging, so that the plurality of supporting rods 107 synchronously expand radially outward, and the side wall area of the filter bag 110 radially bulges.

[0080] In the process, the spring b 310 is stretched, stores potential energy, and provides power support for the subsequent reset. When the air inlet pipe b 307 moves downward to the preset position under the pressure pushing, the communication port 312 on the inner wall of the air inlet pipe b 307 is aligned with the injection port a 311 on the side wall of the air inlet pipe a 302, and the two form communication, at this time, the high-pressure gas enters the communication port 312 through the injection port a 311, and is injected into the inside of the filter bag 110 through the injection port b 313 at the bottom thereof, forming air flow impact on the filter bag 110.

[0081] The application realizes a "structure disturbance-delay recoil" linkage dust cleaning path with air pressure as a single driving source. The core feature is that before the high-pressure gas is directly injected into the filter bag 110, the pressure chamber 308 is first filled with pressure to preferentially trigger the linkage deformation of the mechanical structure, so that the filter bag 110 is in a "pre-priming state" for dust cleaning. The communication between the injection port a311 and the communication port 312 is designed as a "delay opening" action, that is, only when the air inlet pipe b307 is lowered to the preset position, the communication channel is opened, ensuring that the time when the high-pressure gas is injected into the filter bag 110 is precisely after the completion of the structure disturbance. This rhythm arrangement avoids waste of airflow and invalid disturbance, and realizes the control of the dust cleaning action.

[0082] When the communication port 312 is aligned with the injection port a311, the gas enters the communication port 312 by inertia, and is sprayed into the filter bag 110 by the injection port b313. At this time, the filter bag 110 is in a deformed state, and the internal dust is in a semi-peeling state, and the desorption effect of the high-pressure airflow impact is significantly enhanced.

[0083] In this embodiment, in order to realize the synchronous rotation of the taut ring 108 during the expansion of the support rod 107 and further optimize the dust cleaning disturbance path, the dust cleaning assembly structure further comprises a connecting rod 400 connected to the bottom of each support rod 107, and the other end of the connecting rod 400 is rotationally connected to the side wall of the taut ring 108.

[0084] Expansion. Since the bottom of each support rod 107 is rotationally connected to a connecting rod 400, and the other end of the connecting rod 400 is connected to the side wall of the taut ring 108, during the radial movement of the support rod 107, the connecting rod 400 is driven to deflect, thereby transmitting the radial movement component force to the taut ring 108 in the circumferential direction.

[0085] In this transmission path, the radial expansion of the support rod 107 not only exerts a bulging tension on the filter bag 110, but also effectively converts the tension into a ring torsion force of the taut ring 108 through the connecting rod 400, so that the bottom of the filter bag 110 rotates and deforms in the ring direction significantly under the premise of longitudinal stability. The coupling action of "expansion + screwing" causes the lower region of the filter bag 110 to produce complex and strong disturbance, enhances the structure loosening ability of the dust at the bottom and the corner, and effectively avoids the problem of incomplete cleaning at the bottom in the traditional dust cleaning method.

[0086] In this embodiment, in order to improve the connection strength between the taut ring 108 and the bottom of the filter bag 110, a plurality of insertion openings 401 are formed in the bottom of the taut ring 108, and a plurality of upward tapered insertion rods 403 are uniformly connected to the top of the stabilizing ring 402, and the positions of the tapered insertion rods 403 correspond to the insertion openings 401 one by one.

[0087] When assembled, each tapered plug rod 403 passes through the pre-set through hole in the bottom of the filter bag 110 and is inserted into the insertion port 401 of the taut ring 108, forming a self-centering plug connection. Further, the stabilizing ring 402 is also provided with a threaded hole, and a fastening bolt 404 is threadedly connected in the threaded hole, which passes through the bottom of the filter bag 110 and is screwed with the corresponding screw hole of the taut ring 108.

[0088] Through the above arrangement, the connection between the taut ring 108 and the bottom of the filter bag 110 is no longer dependent on a single adhesive method, but is achieved by inserting the tapered plug rod 403 into the insertion port 401 of the taut ring 108 and locking it with a bolt, realizing a mechanical rigid connection.

[0089] When the dust cleaning mechanism is started, the plurality of supporting rods 107 are radially expanded and pull the taut ring 108 to rotate, and due to the high torsional strength and connection stability of the structure, the rotational torque can be smoothly transmitted between the taut ring 108 and the bottom of the filter bag 110, avoiding the sliding or deformation failure of the filter bag 110 due to loose connection. Further improve the execution stability of the "inflation + torsion" composite disturbance at the bottom of the filter bag 110.

[0090] In order to improve the vibration response strength of the filter bag 110 during the dust cleaning process, while taking into account the detachability and installation convenience, in the embodiment, a threaded tube 405 extending vertically downward is arranged on the connecting plate 106, and the outer wall of the threaded tube 405 is provided with a threaded structure. The top of the filter bag 110 is fixedly installed with a connecting ring 406, and the inner wall of the connecting ring 406 is provided with an inner threaded structure matched with the threaded tube 405, and the two can be screwed to realize the quick assembly and disassembly between the filter bag 110 and the connecting plate 106. The threaded tube 405 is connected to the connecting plate 106 in a sliding manner, and a spring c 407 is arranged between the threaded tube 405 and the connecting plate 106.

[0091] Through the above arrangement, when the device is cleaning dust, the air pump 111 is started, and high-pressure gas first enters the air inlet pipe a 302 inside through the conveying frame 300 and the air inlet pipe 301, and then enters the pressure chamber 308 between the air inlet pipe a 302 and the air inlet pipe b 307 through the pressure port 309. With the rapid accumulation of air pressure in the pressure chamber 308, the air inlet pipe b 307 moves downward under the action of the gas, overcoming the elastic force of the spring b 310, and at the same time drives the sliding ring 303 fixed thereon to slide downward along the connecting plate 106.

[0092] The downward sliding of the sliding ring 303 drives the whole action of the connecting rod 304 mechanism, and the multiple support rods 107 are expanded radially outward along the filter bag 110, and the connecting rod 400 connected to the bottom of the support rod 107 is driven to rotate, thereby pulling the taut ring 108 to rotate along the bottom of the filter bag 110. This rotating action not only causes strong disturbance in the bottom area of the filter bag 110, but also causes the filter bag 110 to be pulled down slightly in the longitudinal direction when the taut ring 108 rotates, because the taut ring 108 is reliably connected to the bottom of the filter bag 110 through the stabilizing ring 402, the conical insertion rod 403, and the fastening bolt 404.

[0093] At this time, the top of the filter bag 110 is screwed with the threaded pipe 405 on the connecting plate 106 through the connecting ring 406, and is supported by the spring c 407 to provide upward pulling elastic force. When the filter bag 110 is pulled downward from the bottom, the spring c 407 between the connecting ring 406 and the threaded pipe 405 is compressed, and gradually stores the elastic potential energy required for resetting.

[0094] After the dust cleaning action is completed and the air pump 111 stops sending air, the pressure in the air inlet pipe a 302 decreases rapidly, the air inlet pipe b 307 and the sliding ring 303 are moved upward to reset under the action of the spring a 306 and the spring b 310, the connecting rod 304 and the support rod 107 are withdrawn, and the taut ring 108 is reset to rotate. At this time, the spring c 407 releases the previously compressed elastic potential energy, pushes the connecting ring 406 and the top of the filter bag 110 to rebound, and forms a vibration impact in the axial direction of the filter bag 110.

[0095] The inertial vibration generated during the resetting process can further intensify the separation of loosened dust, improve the thoroughness and efficiency of dust cleaning, and realize the multi-stage coupling dust cleaning effect of structural disturbance and airflow scouring.

[0096] Although embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A woodworking central dust collector, comprising a dust collector body (100), a filter assembly, and a dust cleaning assembly arranged in a filter bag (110), characterized in that: a dust removal chamber (101) and a dust suction chamber (102) are formed in the dust collector body (100), and a gas chamber valve is arranged between the two chambers, the gas chamber valve separates the two chambers, a gas inlet (103) is arranged on the side wall of the dust removal chamber (101), and a gas outlet (104) is arranged on the side wall of the dust suction chamber (102); the filter assembly is arranged in the dust removal chamber (101), the filter assembly comprises a filter support (105) connected to the dust removal chamber (101), a plurality of connecting plates (106) are connected to the filter support (105), and the filter bag (110) is fixed to the connecting plates (106); the dust cleaning assembly comprises a plurality of supporting rods (107) arranged on the connecting plates (106), the bottom of each supporting rod (107) is provided with a tightening ring (108), the supporting rod (107) can rotate the tightening ring (108) when sliding on the connecting plate (106), and the tightening ring (108) is fixed to the filter bag (110); further comprising an air inlet assembly and a settling chamber (109) arranged at the bottom of the dust collector body (100), the settling chamber (109) is in communication with the dust removal chamber (101), the air inlet assembly is arranged in the dust suction chamber (102), and the air inlet assembly is used for extracting air in the dust removal chamber (101).

2. A central dust extractor for wood working according to claim 1, characterized in that the gas chamber valve comprises a plugging frame (200), the plugging frame (200) is fixed between the dust removal chamber (101) and the dust suction chamber (102), a closing plate (201) is rotatably connected to the plugging frame (200), a motor a (202) is connected to the plugging frame (200), and the driving shaft of the motor a (202) is fixed to the rotating shaft of the closing plate (201).

3. A central dust extractor for wood working according to claim 1, characterized in that the air inlet assembly comprises a connecting frame (203) connected to the dust suction chamber (102), an air suction fan (204) is connected to the connecting frame (203), and the air inlet of the air suction fan (204) faces the gas chamber valve through the connecting frame (203); a partition plate (112) is connected to the side wall of the dust removal chamber (101), an air inlet channel is formed between the partition plate (112) and the filter support (105), a settling chamber (113) is formed between the partition plate (112) and the dust removal chamber (101), and the air inlet (103) is in communication with the dust removal chamber (101) through the settling chamber (113).

4. A central dust extractor for woodworking according to claim 1, characterized in that the bottom of the settling chamber (109) is provided with a conveying mechanism for conveying wood chips in the settling chamber (109) and the outside. The conveying mechanism comprises a conveying cavity (205) communicated with the bottom of the settling cavity (109), a conveying shaft (206) is rotationally connected in the conveying cavity (205), the conveying shaft (206) is externally provided with a propeller (207), a motor b (208) is connected to the conveying cavity (205), the driving shaft of the motor b (208) is connected with the conveying shaft (206), and a discharging port (209) is formed in the bottom of the conveying cavity (205).

5. A central dust extractor for woodworking according to claim 1, characterized in that The ash removal assembly further comprises a gas pump (111) arranged on the dust collector body (100), the gas outlet end of the gas pump (111) is communicated with the filter bag (110), and the ash removal assembly can synchronously move a plurality of the supporting rods (107) when the gas pump (111) supplies air to the filter bag (110). The dust removal cavity (101) is connected with a conveying frame (300), the conveying frame (300) is hollow, located at the upper portion of the filter support (105), the gas outlet end of the gas pump (111) is communicated with the conveying frame (300), the conveying frame (300) is communicated with a gas inlet pipe a (302) that faces the filter bag (110).

6. A central dust extractor for woodworking according to claim 5, characterized in that The ash removal assembly further comprises a sliding ring (303) slidingly connected to the connecting plate (106), the bottom of the sliding ring (303) is rotationally connected with a connecting rod (304), the bottom of the connecting plate (106) is fixedly connected with a fixed shaft (305), the connecting rod (304) is slidingly connected to the fixed shaft (305), the supporting rod (107) is rotationally connected to the bottom of the connecting rod (304), and the sliding ring (303) and the connecting plate (106) are connected with a spring a (306).

7. A central dust extractor for woodworking according to claim 6, characterized in that The ash removal assembly further comprises a gas inlet pipe b (307) fixed to the sliding ring (303), the gas inlet pipe b (307) is sleeved at the bottom of the gas inlet pipe a (302), a pressure cavity (308) is formed between the bottom of the gas inlet pipe a (302) and the gas inlet pipe b (307), the bottom of the gas inlet pipe a (302) is provided with a pressure port (309) communicated with the pressure cavity (308), the gas inlet pipe a (302) and the gas inlet pipe b (307) are connected with a spring b (310), a jet port a (311) is formed in the side wall of the gas inlet pipe a (302), a communication port (312) is formed in the inner wall of the gas inlet pipe b (307), the bottom of the communication port (312) is provided with a jet port b (313) communicated with the filter bag (110), and the height of the jet port a (311) is lower than that of the communication port (312).

8. A woodworking central dust extractor according to claim 1, characterized in that The bottom of the supporting rod (107) is rotationally connected with a connecting rod (400), and the other end of the connecting rod (400) is rotationally connected to the sidewall of the taut ring (108).

9. A central dust extractor for woodworking according to claim 1, characterized in that The bottom of the tightening ring (108) is provided with a plurality of insertion openings (401), the bottom of the filter bag (110) is provided with a stabilizing ring (402), the top of the stabilizing ring (402) is connected with a plurality of tapered insertion rods (403) corresponding to the insertion openings (401), the tapered insertion rods (403) are sleeved in the insertion openings (401) through the bottom of the filter bag (110), the stabilizing ring (402) is threadedly connected with a fastening bolt (404), and the fastening bolt (404) is threadedly connected with the tightening ring (108) through the filter bag (110).

10. A central dust extractor for woodworking according to claim 1, characterized in that The connecting plate (106) is provided with a threaded pipe (405), the top of the filter bag (110) is fixed with a connecting ring (406) threadedly matched with the threaded pipe (405), the threaded pipe (405) is slidably connected on the connecting plate (106), and a spring c (407) is connected between the connecting plate (106).

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