Dust removal equipment for furniture production

Abstract

The invention belongs to the technical field of furniture production, and particularly discloses dust removal equipment for furniture production, which comprises a pore plate, dust removal cloth bags, an air storage chamber, an air blowing main pipe, air blowing branch pipes and piston pipes, the pore plate is fixedly arranged between a dust removal bin and a static air bin, the dust removal cloth bags are inserted into the pore plate in an array shape and downwards extend into the dust removal bin, and the air storage chamber is arranged in the air storage chamber. The air storage chamber is arranged on the outer side of the bag-type dust collector body, the air blowing main pipe is arranged on the upper portion of the static air bin in the horizontal direction, the air blowing branch pipes are arranged in an array mode, one ends of the air blowing branch pipes perpendicularly communicate with the air blowing main pipe, the other ends of the air blowing branch pipes communicate with vertically-arranged air blowing outer pipes, and air blowing inner pipes are arranged in the air blowing outer pipes in a sealed and sliding mode; and the piston pipe is horizontally communicated with the middle part of the blowing branch pipe. The local pressure difference change of the cloth bag is sensed through the pressure sensing assembly, the pressure difference is used for driving the piston to automatically open and close the air blowing pipeline, the air blowing opening and the pressure sensing assembly are arranged in an equal-height linkage mode, and accurate back blowing of different-height blocking areas of the cloth bag is achieved through pure mechanical feedback.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of furniture production, and particularly relates to a dust removal equipment for furniture production. BACKGROUND

[0002] In the field of furniture manufacturing and wood processing, a large amount of waste, mainly including large-particle wood chips and fine dust, is generated in processes such as cutting, polishing and drilling. If these particulate matters are directly discharged without effective treatment, not only the workshop environment will be seriously polluted, endangering the respiratory health of operating personnel, but also safety accidents such as dust explosion may be caused due to excessively high dust concentration. Therefore, an efficient dust removal system is an indispensable key equipment in a furniture production line.

[0003] The mainstream dust removal process in the industry currently usually adopts a two-stage separation treatment mode: first, the centrifugal force generated by a cyclone separator is used to separate and collect large-particle wood chips with large mass from the airflow; then the airflow carrying fine dust enters a bag filter, and the small dust is intercepted by the filtering action of the filter bag, and the purified gas is discharged into the atmosphere. However, in actual industrial applications, the existing bag filter dust removal technology still has significant technical defects: Firstly, as the dust removal equipment continuously operates, fine dust will gradually adhere and accumulate on the surface of the filter bag, resulting in a decrease in the air permeability of the filter bag and a sharp increase in the operating resistance of the equipment. The existing solution usually adopts a pulse blow cleaning system, i.e., periodic high-pressure gas backflushing is performed at preset time intervals. This time-based cleaning method lacks pertinence and cannot clean the filter bag on demand according to the actual clogging degree, often causing waste of compressed air energy and incomplete cleaning after pressure reduction.

[0004] Secondly, although some high-end dust removal equipment introduces a gas pressure sensor to monitor the pressure difference inside and outside the filter bag to achieve targeted cleaning. However, due to the long and cylindrical structure of the industrial dust removal bag, the dust adsorption amount and clogging degree at different heights are often uneven. The existing single gas pressure sensor cannot identify the specific clogging distribution of the bag at different heights and cannot achieve targeted cleaning; since the sensor probe needs to be placed in a high-concentration dust gas flow environment for a long time, it is easy to cause dust agglomeration, probe clogging or wear, resulting in sensor sensitivity drift, signal distortion or even complete failure. In order to maintain the accuracy of the monitoring system, the enterprise must frequently clean or replace the sensor, which not only increases the downtime maintenance time of the equipment, but also greatly increases the operation and maintenance cost of the equipment. SUMMARY

[0005] In view of the above, the present application provides a kind of furniture production dust removal equipment, and the partial pressure difference change of cloth bag is perceived by pressure sensing component, and the piston is automatically opened and closed blow pipe line using pressure difference driving, and blowout port and pressure sensing component are isohypse linkage arrangement, discard traditional electronic sensor, utilize pure mechanical feedback realizes the accurate back blowing for the different height jammed area of cloth bag, solve the longitudinal jamming identification problem, while ensuring the dust removal precision, greatly reduce maintenance cost.

[0006] The technical scheme adopted by the present application is as follows: the present application provides a kind of furniture production dust removal equipment, including cloth bag dust collector body, the cloth bag dust collector body includes ash bucket, dust removal bin and static gas bin, which are sequentially communicated from bottom to top, further including perforated plate, dust removal cloth bag, gas storage chamber, blowout main pipe, blowout branch pipe and piston pipe.

[0007] Further, the perforated plate is fixed between the dust removal bin and the static gas bin, the dust removal cloth bag is arrayed and inserted into the perforated plate and extends downward into the dust removal bin, the gas storage chamber is arranged outside the cloth bag dust collector body, and the blowout main pipe is arranged at the upper part of the static gas bin in the horizontal direction.

[0008] Further, the blowout branch pipe is arrayed and one end is vertically communicated with the blowout main pipe, the other end of the blowout branch pipe is communicated with a vertically arranged blowout outer pipe, the blowout outer pipe is coaxially arranged with the axis of the dust removal cloth bag, and the blowout inner pipe is sealingly and slidably arranged in the blowout outer pipe.

[0009] Further, the piston pipe is horizontally communicated and arranged in the middle of the blowout branch pipe, one end of the piston pipe is upwardly communicated with a constant pressure pipe, the constant pressure pipe penetrates the top of the static gas bin and is communicated with the atmosphere, and the other end of the piston pipe is downwardly communicated with a variable pressure outer pipe.

[0010] Further, the variable pressure outer pipe is sealingly and slidably arranged with a variable pressure inner pipe, the variable pressure inner pipe penetrates the perforated plate into the dust removal bin, the bottom end of the variable pressure inner pipe is connected with a pressure sensing ring, and the pressure sensing ring is coaxially and spacedly arranged on the periphery of the dust removal cloth bag.

[0011] Further, the piston pipe is sealingly and slidably arranged with a translation piston, the translation piston is connected with the inner wall of the constant pressure pipe through a spring at one end of the translation piston, and a vertical through hole is formed in the translation piston; when the spring is in the initial state, the through hole is completely communicated with the inner cavity of the blowout branch pipe; when the gas pressure in the variable pressure outer pipe decreases, the translation piston can move to the side of the variable pressure outer pipe by overcoming the elastic force of the spring, so that the solid part of the translation piston blocks the blowout branch pipe.

[0012] Further, the blowing inner tube extends downward to the inside of the dust cloth bag, and uniform blowing holes are arranged on the lower end side wall of the blowing inner tube, which are located immediately below the pressure sensing ring in the height direction, so that the sensing position and the back blowing position are arranged at the same height.

[0013] Further, the pressure sensing ring is a hollow ring structure, the inside of the pressure sensing ring is communicated with the inside of the pressure changing inner tube, and the lower surface of the pressure sensing ring is uniformly communicated with a pressure sensing hole, which is used for sensing the air pressure of the corresponding position.

[0014] Further, the inside and outside of each dust cloth bag are provided with a vertical traction rod, the lower end of one of the traction rods is connected with the lower end of the blowing inner tube in the dust cloth bag, the lower end of the other traction rod passes through the hole plate and is connected with the pressure sensing ring, and the upper ends of the two traction rods are fixedly connected through a linkage rod.

[0015] Further, a horizontal support rod is arranged above the hole plate, a plurality of linkage rods in the same row are fixedly connected with the same support rod, and the plurality of support rods are fixedly connected through a main rod.

[0016] Further, a screw lifting assembly is arranged in the static gas chamber, and the output end of the screw lifting assembly is screw-connected with the main rod, so as to indirectly drive the main rod to move up and down with all the pressure sensing rings covering the dust cloth bag.

[0017] Further, the blowing main pipe array is arranged as a plurality of blowing main pipes, each of which is communicated with the gas storage chamber through a gas valve, and the pressure changing outer tube and the blowing outer tube are arranged in the static gas chamber.

[0018] The beneficial effects achieved by the above structure are as follows: (1) By cooperating the translation piston with the blowing branch pipe, the present application changes the present situation that the traditional fixed time pulse blowing lacks pertinence, when the dust cloth bag is not blocked, the negative pressure generated by Bernoulli's principle is used to adsorb the translation piston to block the gas path, only when the pressure rises due to local blockage is detected by the pressure sensing ring, the corresponding gas path is opened, this on-demand dust removal method not only greatly saves the compressed air energy, but also concentrates the gas amount in the gas storage chamber to the specific position where the blockage occurs, avoids the dispersion of gas pressure caused by full chamber blowing, and significantly improves the dust removal strength and stripping effect of single back blowing.

[0019] (2) The present application solves the problem that a single sensor cannot identify the longitudinal uneven blockage of the long strip-shaped dust cloth bag, the screw lifting assembly drives the pressure sensing ring and the blowing inner tube to reciprocate in the full length range of the dust cloth bag, the pressure sensing ring can accurately sense the air permeability change of different height positions of the dust cloth bag, and once blockage is found at a certain height, the blowing hole immediately performs point dust removal, so that the dust cloth bag can be accurately cleaned at any position in the longitudinal direction.

[0020] (3) The present application has the function of self-adapting to adjust the back blowing amount according to the degree of blockage. The displacement of the translation piston in the piston tube is directly controlled by the pressure feedback of the pressure sensing ring, and the pressure corresponds to the degree of blockage. When the blockage is serious, the pressure rises significantly, the spring pushes the translation piston to move a greater distance, the overlapping area of the through hole and the blowing branch pipe increases, and the back blowing amount increases accordingly. Conversely, the gas amount decreases. This mechanical proportional regulation mechanism ensures the matching of the dust removal intensity and the degree of blockage, and avoids excessive back blowing to the slightly blocked place.

[0021] (4) The present application discards the electronic air pressure sensor which is easily affected by the dust environment in the traditional high-end dust removal equipment, and adopts a differential pressure feedback mechanism of pure mechanical structure, which uses mechanical components such as translation piston, spring and pressure sensing ring instead of electronic probe, thereby fundamentally eliminating the signal distortion or component failure caused by dust hardening and probe wear. This design greatly improves the running stability of the equipment in harsh working conditions, and greatly reduces the downtime maintenance frequency and operating cost of enterprises. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A perspective structural schematic view of a dust removal equipment for furniture production is provided.

[0023] Figure 2 A perspective structural schematic view of a dust removal equipment for furniture production is provided.

[0024] Figure 3 A perspective structural schematic view of a dust removal equipment for furniture production is provided.

[0025] Figure 4 A perspective structural schematic view of a dust removal equipment for furniture production is provided.

[0026] Figure 5 A perspective structural schematic view of a dust removal equipment for furniture production is provided. Figure 4 A perspective structural schematic view of a dust removal equipment for furniture production is provided.

[0027] Figure 6 A perspective structural schematic view of a dust removal equipment for furniture production is provided.

[0028] Figure 7 A perspective structural schematic view of a dust removal equipment for furniture production is provided. Figure 4 A perspective structural schematic view of a dust removal equipment for furniture production is provided.

[0029] Figure 8 A perspective structural schematic view of a dust removal equipment for furniture production is provided.

[0030] Figure 9 A perspective structural schematic view of a dust removal equipment for furniture production is provided. Figure 4Zoomed-in view of the middle C portion.

[0031] Wherein, 1, cloth bag dust collector body, 11, dust removal bin, 12, static gas bin, 13, gas storage chamber, 14, gas blowing main pipe, 15, ash bucket, 16, gas valve, 2, orifice plate, 3, dust removal cloth bag, 4, gas blowing branch pipe, 5, piston pipe, 51, variable pressure outer pipe, 52, constant pressure pipe, 53, translational piston, 54, spring, 55, through hole, 6, gas blowing outer pipe, 61, gas blowing inner pipe, 62, gas blowing hole, 7, variable pressure inner pipe, 71, pressure sensing ring, 72, pressure sensing hole, 8, traction rod, 81, linkage rod, 9, support rod, 91, main rod, 92, screw lifting assembly.

[0032] The accompanying drawings are included to provide a further understanding of the application, and constitute a part of the specification, illustrate embodiments of the application, and are used to explain the application, and do not constitute a limitation on the application. DETAILED DESCRIPTION

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

[0034] In the description of the application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0035] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9As shown, the dust removal equipment for furniture production is provided, the main structure of the equipment comprises a bag filter body 1, the bag filter body 1 comprises a hopper 15, a dust removal bin 11 and a static gas bin 12 which are sequentially and communicatively arranged from bottom to top, a hole plate 2 is fixedly arranged between the dust removal bin 11 and the static gas bin 12, the hole plate 2 separates the dust removal bin 11 from the static gas bin 12, a plurality of dust removal bags 3 are arrayed and inserted on the hole plate 2 and extend downward to the inside of the dust removal bin 11, dust-containing gas enters the dust removal bin 11, after being filtered by the dust removal bags 3, clean gas enters the static gas bin 12 and is finally discharged.

[0036] In order to realize the ash cleaning function, a gas storage chamber 13 is arranged on the outside of the bag filter body 1 for storing high-pressure compressed air, a plurality of air blowing main pipes 14 are arrayed in the horizontal direction on the upper part of the static gas bin 12, each air blowing main pipe 14 is communicated with the gas storage chamber 13 through an air valve 16, and the air valve 16 is used for controlling the on-off of a single air blowing main pipe 14.

[0037] A plurality of arrayed air blowing branch pipes 4 are vertically communicated on each air blowing main pipe 14, the number of a row of air blowing branch pipes 4 corresponds to the number of a row of dust removal bags 3, one end of the air blowing branch pipe 4 is communicated with a vertically arranged air blowing outer pipe 6, the air blowing outer pipe 6 is located in the static gas bin 12 and is coaxially arranged with the axis of the corresponding dust removal bag 3, an air blowing inner pipe 61 is sealingly and slidably arranged in the air blowing outer pipe 6, the air blowing inner pipe 61 extends downward and deeply into the inside of the dust removal bag 3, and air blowing holes 62 are uniformly arranged on the lower end side wall of the air blowing inner pipe 61 and used for spraying high-pressure air flow to the inner wall of the dust removal bag 3.

[0038] The key improvement of the present application is that a set of follow-up type mechanical pressure sensing and control mechanism is introduced, specifically, a piston pipe 5 is horizontally communicated in the middle of the air blowing branch pipe 4, one end of the piston pipe 5 is upwardly communicated with a constant pressure pipe 52, the constant pressure pipe 52 penetrates out of the top of the static gas bin 12 and is directly communicated with the outside atmosphere, thereby providing a constant atmospheric pressure reference for one side of the piston pipe 5, the other end of the piston pipe 5 is downwardly communicated with a variable pressure outer pipe 51, the variable pressure outer pipe 51 is located in the static gas bin 12, a variable pressure inner pipe 7 is sealingly and slidably arranged in the variable pressure outer pipe 51, and the variable pressure inner pipe 7 penetrates through the hole plate 2 into the dust removal bin 11.

[0039] A pressure sensing ring 71 is connected to the bottom end of the variable pressure inner pipe 7, the pressure sensing ring 71 is coaxially and spacedly sleeved on the periphery of the dust removal bag 3, the pressure sensing ring 71 is a hollow ring structure, the inside space of the pressure sensing ring 71 is communicated with the variable pressure inner pipe 7 and the variable pressure outer pipe 51, and pressure sensing holes 72 are uniformly and communicatively arranged on the lower surface of the pressure sensing ring 71, it is worth noting that the air blowing holes 62 are located immediately below the pressure sensing ring 71 in the height direction, thereby ensuring that the height of the pressure sensing position and the ash cleaning position is synchronous.

[0040] A translation piston 53 is arranged to seal slidingly inside the piston pipe 5, and a spring 54 is connected between one end of the translation piston 53 and the inner wall of the constant-pressure pipe 52. A through hole 55 is arranged vertically through the translation piston 53. The logic of the structure is as follows: when the spring 54 is in the initial state (i.e. not affected by an additional pressure difference), the through hole 55 is in complete communication with the inner cavity of the blowing branch pipe 4, and at this time, the blowing passage is open; when the air pressure in the variable-pressure outer pipe 51 is significantly reduced, the atmospheric pressure pushes the translation piston 53 to move to the side of the variable-pressure outer pipe 51 against the elastic force of the spring 54 through the constant-pressure pipe 52, so that the solid part of the translation piston 53 blocks the blowing branch pipe 4, and at this time, the blowing passage is closed.

[0041] In order to realize the synchronous lifting of the pressure sensing assembly and the blowing assembly, a vertical traction rod 8 is arranged inside and outside each dust cloth bag 3. The lower end of the traction rod 8 arranged inside the dust cloth bag 3 is connected to the lower end of the blowing inner pipe 61, and the lower end of the traction rod 8 arranged outside the dust cloth bag 3 passes through the hole plate 2 and is connected to the pressure sensing ring 71. The upper ends of the two traction rods 8 are fixedly connected through a linkage rod 81, and the linkage rod 81 is located above the hole plate 2. Multiple linkage rods 81 in the same row are fixedly connected to the same horizontal support rod 9, and multiple support rods 9 are fixedly connected through a main rod 91. A screw rod lifting assembly 92 is arranged in the static air bin 12, and the output end of the screw rod lifting assembly 92 is threadedly connected to the main rod 91. By driving the screw rod lifting assembly 92, the main rod 91 can be lifted, and then all the pressure sensing rings 71 and the blowing inner pipes 61 are driven to move up and down reciprocatingly through the support rods 9, the linkage rods 81 and the traction rods 8 to cover all the dust cloth bags 3.

[0042] The specific working process is as follows: Initial starting stage: in the initial state, all air valves 16 are closed, and the gas storage chamber 13 does not supply gas to the blowing main pipe 14. At this time, since the system is not running, the pressure at the pressure sensing ring 71 is close to atmospheric pressure, and the pressure difference on both sides of the piston pipe 5 is very small. Under the action of the spring 54, the translation piston 53 is in the initial position, and the through hole 55 on the translation piston 53 is opposite the inner cavity of the blowing branch pipe 4, but since the air valve 16 is closed, no blowing occurs.

[0043] Normal operation: start the dust removal equipment, dust-containing airflow is filtered by dust removal cloth bag 3 from dust removal bin 11 into static air bin 12, according to Bernoulli's principle, when the airflow normally vertically passes through the dust removal cloth bag 3, the airflow speed on the surface of the cloth bag is fast, resulting in a low static pressure at this place (forming negative pressure), at this time, the screw lifting assembly 92 drives the pressure sensing ring 71 to slowly scan up and down on the surface of the dust removal cloth bag 3, when the pressure sensing ring 71 passes through the unblocked area (initially unblocked), the pressure sensing hole 72 senses the low pressure (high flow rate) on the surface of the cloth bag, the negative pressure is transmitted to the variable pressure outer tube 51 through the variable pressure inner tube 7, at this time, one side of the translation piston 53 is low pressure, and the other side is atmospheric pressure (relatively high pressure) introduced by the constant pressure tube 52, under the action of pressure difference, the translation piston 53 moves to the side of the variable pressure outer tube 51 against the elastic force of the spring 54, resulting in that the through hole 55 is misaligned with the blowing branch pipe 4, and the solid part of the translation piston 53 blocks the blowing branch pipe 4, when the equipment runs stably, all the corresponding piston tubes 5 are in the blocking state, at this time, the operator opens all the air valves 16, although the gas source is connected, but due to the blocking effect of the translation piston 53, no back blowing is generated, avoiding energy waste.

[0044] Precise back blowing stage: as the furniture production proceeds, dust gradually adheres to the surface of the dust removal cloth bag 3, the screw lifting assembly 92 drives the main rod 91 to drive the pressure sensing ring 71 and the blowing inner tube 61 to continuously perform very slow reciprocating lifting movement, when the pressure sensing ring 71 moves to a certain height position of a dust removal cloth bag 3, and dust blocking occurs at this position, the airflow is difficult to penetrate the cloth bag wall at this place, resulting in that the air permeability of this local area decreases sharply, and the airflow speed approaches zero, according to the principle of fluid mechanics, the decrease of flow rate means that the static pressure rises back (compared with the negative pressure during normal filtration, the pressure becomes larger), at this time, the pressure sensing hole 72 senses the pressure rise, the pressure change is transmitted to the variable pressure outer tube 51, so that the pressure difference on both sides of the translation piston 53 decreases, and the restoring force of the spring 54 drives the translation piston 53 to move back to the side of the constant pressure tube 52, when the through hole 55 begins to communicate with the blowing branch pipe 4, the high-pressure gas in the gas storage chamber 13 instantaneously enters the blowing outer tube 6 and the blowing inner tube 61 through the blowing main pipe 14, the blowing branch pipe 4 and the through hole 55, and is finally sprayed out through the blowing hole 62 with the same sensing height as the pressure sensing ring 71, the high-pressure airflow directly impacts the inner wall of the cloth bag at this blocked height, and the dust adhering to the outside falls off.

[0045] Self-adaptive adjustment: if the blocking degree is lighter, the air pressure rises back less, the translation piston 53 moves back a short distance, the overlapping area of the through hole 55 and the blowing branch pipe 4 is small, and the back blowing gas volume is small; if the blocking degree is serious, the air pressure rises back significantly, the translation piston 53 moves back a long distance, the overlapping degree of the through hole 55 and the blowing branch pipe 4 is higher, and the back blowing gas volume is large, once the blocking at this position is cleared, the airflow resumes unobstructed, the pressure at the pressure sensing hole 72 decreases again (the negative pressure increases), and the translation piston 53 is again attracted and blocks the blowing branch pipe 4, and the back blowing automatically stops.

[0046] It has to be noted that, as used herein, the terms "includes", "including", "comprises" or "comprising", or the like, are intended to be open-ended, and not to exclude other elements or steps. It is also noted that the use of "a" or "an" herein does not denote a limitation of quantity, but rather a limitation in the sense of "one or more".

[0047] Although the present application has been described with regard to only a few examples, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, which are defined by the appended claims.

[0048] The above description of the application and its embodiments is not intended to limit the application, as the application is only limited by the appended claims. The drawings shown in the figures are only one of the embodiments of the application, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired by the above description, without departing from the spirit of the application, without creative design, similar structure and embodiments of the technical solution should belong to the protection scope of the application.

Claims

1. A dust removal device for furniture production, comprising a bag filter body (1), wherein the bag filter body (1) comprises a dust hopper (15), a dust collection chamber (11), and a static air chamber (12) arranged sequentially from bottom to top, characterized in that: It also includes an orifice plate (2), a dust collector bag (3), an air storage chamber (13), a main air blowing pipe (14), a branch air blowing pipe (4), and a piston pipe (5); The perforated plate (2) is fixed between the dust removal chamber (11) and the static air chamber (12). The dust removal bags (3) are inserted into the perforated plate (2) in an array and extend downward into the dust removal chamber (11). The air storage chamber (13) is located outside the bag dust collector body (1). The air blowing main pipe (14) is located horizontally above the static air chamber (12). The air blowing branch pipes (4) are arranged in an array and one end is vertically connected to the air blowing main pipe (14). The other end of the air blowing branch pipes (4) is connected to a vertically arranged air blowing outer pipe (6). The air blowing outer pipe (6) is coaxially arranged with the axis of the dust collector bag (3). The air blowing outer pipe (6) is sealed and slidably provided with an air blowing inner pipe (61). The piston tube (5) is horizontally connected to the middle of the blowing branch pipe (4). One end of the piston tube (5) is connected to a constant pressure pipe (52) at the top. The constant pressure pipe (52) extends upward through the top of the static air chamber (12) and communicates with the atmosphere. The other end of the piston tube (5) is connected to a variable pressure outer pipe (51) at the bottom. The transformer outer tube (51) is sealed and slidably provided with a transformer inner tube (7). The transformer inner tube (7) passes downward through the orifice plate (2) and enters the dust removal chamber (11). The bottom end of the transformer inner tube (7) is connected to a pressure sensing ring (71). The pressure sensing ring (71) is coaxially spaced around the dust removal bag (3).

2. The dust removal equipment for furniture production according to claim 1, characterized in that: The piston tube (5) is internally sealed and slidably equipped with a translation piston (53). One end of the translation piston (53) facing the constant pressure tube (52) is connected to the inner wall of the constant pressure tube (52) by a spring (54). The translation piston (53) is provided with a vertical through hole (55). When the spring (54) is in the initial state, the through hole (55) is completely connected to the inner cavity of the air blowing branch tube (4). When the air pressure in the pressure changing outer tube (51) decreases, the translation piston (53) can overcome the elastic force of the spring (54) and move to the side of the pressure changing outer tube (51), so that the solid part of the translation piston (53) blocks the air blowing branch tube (4).

3. The dust removal equipment for furniture production according to claim 2, characterized in that: The air blowing inner tube (61) extends downward into the dust collector bag (3). Air blowing holes (62) are evenly opened on the lower side wall of the air blowing inner tube (61). The air blowing holes (62) are located in the height direction close to the pressure sensing ring (71).

4. A dust removal device for furniture production according to claim 3, characterized in that: The pressure-sensing ring (71) is a hollow ring structure. The interior of the pressure-sensing ring (71) is connected to the interior of the transformer inner tube (7). The pressure-sensing ring (71) has pressure-sensing holes (72) uniformly connected on its lower surface.

5. A dust removal device for furniture production according to claim 4, characterized in that: Each dust collector bag (3) has a vertical traction rod (8) inside and outside. The lower end of one traction rod (8) is connected to the lower end of the air blowing tube (61) inside the dust collector bag (3), and the lower end of the other traction rod (8) passes through the perforated plate (2) and is connected to the pressure sensing ring (71). The upper ends of the two traction rods (8) are fixedly connected by a linkage rod (81).

6. A dust removal device for furniture production according to claim 5, characterized in that: A horizontal support rod (9) is provided above the perforated plate (2). Multiple linkage rods (81) in the same row are fixedly connected to the same support rod (9). Multiple support rods (9) are fixedly connected to each other through a main rod (91).

7. A dust removal device for furniture production according to claim 6, characterized in that: The static air chamber (12) is equipped with a screw lifting assembly (92); the output end of the screw lifting assembly (92) is threadedly connected to the main rod (91) to drive the main rod (91) to indirectly drive all pressure-sensing rings (71) to cover the dust collector bag (3) to move up and down reciprocally.

8. A dust removal device for furniture production according to claim 7, characterized in that: The air blowing pipe (14) array is configured as multiple, and each air blowing pipe (14) is connected to the air storage chamber (13) through an air valve (16). The variable pressure outer pipe (51) and the air blowing outer pipe (6) are both located in the static air chamber (12).

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