Dust recovery device for grinding machine

Abstract

The invention relates to the technical field of dust treatment, and discloses a dust recovery device for a grinding miller, which comprises a recovery tank, an air inlet pipe, an exhaust pipe and a slag discharge pipe, the air inlet pipe and the exhaust pipe are communicated and mounted on the side wall of the recovery tank, the slag discharge pipe is mounted at the bottom of the recovery tank, a check valve is mounted on the slag discharge pipe, and the air inlet pipe is connected with a cyclone dust collector. The rotating disc is rotationally connected in the recycling tank, the partition plate is fixedly arranged on the recycling tank, the partition plate and the rotating disc are both located between the air inlet pipe and the exhaust pipe, the partition plate is located below the rotating disc, and a third rotating assembly used for driving the rotating disc to rotate is arranged on the recycling tank; by arranging the movable semicircular plate, a closed cylindrical space is formed during dust removal, a to-be-cleaned cloth bag is isolated from the surrounding environment, dust shaken off by pulse jet is limited in the closed space and directly falls into the bottom of a recovery tank through a round hole, and the risk that the dust suspends and diffuses in the box body and is adsorbed by an adjacent cloth bag is avoided; and secondary pollution is completely eradicated from the source.

Description

Technical Field

[0001] The invention belongs to the technical field of dust treatment, and in particular relates to a dust recovery device for a grinder. Background Art

[0002] Various industrial grinding processes, such as those involving the grinding of metals, ceramics, and minerals, generate large amounts of fine dust. This dust not only pollutes the working environment and harms the health of operators, but also has recycling value. Therefore, efficient and reliable dust recovery equipment is crucial.

[0003] Bag-type dust collection technology is widely used in dust recovery systems for grinding mills due to its high filtration accuracy (effectively capturing micron-sized dust), relatively mature structure, wide air volume handling range, and adaptability to grinding dust (especially dry dust). Its core principle is to use fiber filter bags to intercept, screen, inertially impact, and diffuse the dust-laden airflow, trapping the dust on the outer surface of the filter bag while the purified air passes through the bag and exits. Currently, bag-type dust collection systems for grinding mills generally use pulse jet cleaning as the primary means of maintaining the bag's continuous filtration capacity. The basic working process of this technology is as follows: dust-laden airflow enters the dust collector housing, where dust is captured by the outer wall of the filter bag. As the dust layer thickens, the filtration resistance (differential pressure) rises to a set value, and the cleaning system activates. During cleaning, compressed air is instantaneously injected into the injection pipe above the filter bag through a pulse valve. The nozzle is then aimed at the bag opening, releasing a high-speed, high-pressure reverse airflow downward. This airflow causes the filter bag to expand and shake violently in a very short time, intending to peel off the dust layer attached to the outer surface of the filter bag and drop it into the ash hopper below, thereby achieving the regeneration of the filter bag.

[0004] However, the existing pulse jet bag dust removal technology has two significant disadvantages when applied to grinding machine dust recovery: Dust secondary adhesion problem: During the pulse jet cleaning process, not all of the forcefully shaken dust falls smoothly into the hopper. Due to the intense disturbance of the jet airflow within the limited space of the chamber, and the generally fine particle size and light weight of abrasive dust, a considerable portion of the removed dust fails to settle effectively and instead becomes suspended within the chamber. This suspended dust is easily adsorbed by adjacent or nearby filter bags currently filtering, resulting in "secondary adhesion." This not only directly weakens the cleaning effect and causes premature clogging of adjacent filter bags, but more seriously, it continuously reduces the effective filtration area and overall efficiency of the entire dust collector unit.

[0005] Reduced dust removal efficiency: The aforementioned secondary dust attachment phenomenon creates a vicious cycle: the reduction in effective filtration area leads to a passive increase in filtration velocity, accelerating filter bag clogging; frequent cleaning requirements (due to a rapid increase in pressure differential) further exacerbate dust suspension and secondary attachment; at the same time, the uneven and unstable dust layer attached to the filter bags also affects filtration accuracy. The end result is a dust collector with consistently high operating resistance, shortened cleaning cycles, increased energy consumption, and an overall, sustained dust removal efficiency significantly lower than the design expectation or theoretical value, making it difficult to stably meet strict environmental emission standards or the requirements for efficient dust recovery over the long term. Summary of the Invention

[0006] The purpose of the embodiment of the present invention is to provide a dust recovery device for a grinder, aiming to solve the problem that when the existing dust recovery device cleans the bags, the dust shaken off easily adheres to adjacent bags, resulting in incomplete dust removal and affecting the dust removal effect of the bags.

[0007] The present invention is achieved as follows: a dust recovery device for a grinding machine comprises a recovery tank, an inlet pipe and an exhaust pipe installed in communication on the side wall of the recovery tank, a slag discharge pipe installed at the bottom of the recovery tank, a check valve installed on the slag discharge pipe, and the inlet pipe is connected to the cyclone dust collector, and also comprises: a rotating disk rotatably connected in the recovery tank, and a partition fixed to the recovery tank, the partition and the rotating disk are both located between the inlet pipe and the exhaust pipe, the partition is located below the rotating disk, and a rotating component three is provided on the recovery tank for driving the rotating disk to rotate; a plurality of cloth bags are evenly installed in an annular shape on the bottom of the rotating disk, a circular hole is provided on the partition, two semicircular plates are slidably connected to the top of the partition, and the two semicircular plates are connected to a telescopic part one, and the telescopic part one drives the semicircular plates to move; a pulse jet assembly is installed on the top of the recovery tank, and the pulse jet assembly is used to spray air to the cloth bags located in the cylindrical space.

[0008] A further technical solution is that the rotating component three includes a motor three fixed on the side wall of the recovery tank, the rotating end of the motor three is fixedly connected to a gear three, an outer gear ring five is embedded on the side wall of the rotating disk, and an avoidance groove is provided on the side wall of the recovery tank, and the gear three is engaged with the outer gear ring five through the avoidance groove.

[0009] A further technical solution is that a cleaning brush is vertically fixed to the inner wall of the partition, a rotating mounting sleeve is rotatably connected to the rotating disk, the top opening of the cloth bag is fixed on the rotating mounting sleeve, the top of the rotating mounting sleeve is rotatably connected to mounting sleeve 1, the mounting sleeve 1 is located in the cloth bag, a spiral support rod is fixed on one side wall of the mounting sleeve, the mounting sleeve 1 is rotatably connected to the mounting sleeve 2, a tray is fixed to the bottom of the mounting sleeve 2, the tray is in contact with the bottom of the inner wall of the cloth bag, and a rotating component 1 and a rotating component 2 are provided on the recovery tank, the rotating component 1 is used to drive the rotating mounting sleeve and the mounting sleeve 2 to rotate, and the rotating component 2 is used to drive the mounting sleeve 1 to rotate.

[0010] A further technical solution is that the rotating component 1 includes an outer gear ring 2 fixed to the top of the rotating mounting sleeve through a bracket, and an outer gear ring 1 fixed to the top of the mounting sleeve 2 through a bracket, the outer gear ring 2 and the outer gear ring 1 are both located above the rotating disk, and the outer gear ring 2 is located below the outer gear ring 1, and a rotating ring is rotatably connected in the recovery tank, and meshing teeth with both the outer gear ring 1 and the outer gear ring 2 are fixed on the inner wall of the rotating ring, a motor 1 is fixed on the side wall of the recovery tank, a gear 1 is fixed on the rotating end of the motor 1, an outer gear ring 3 is embedded and fixed on the side wall, and an avoidance groove is provided on the side wall of the recovery tank, and the gear 1 meshes with the outer gear ring 3 through the avoidance groove.

[0011] A further technical solution is that the rotating component 2 includes an outer gear ring 4 fixed to the top of the mounting sleeve 1 through a bracket, a motor 2 is installed on the top of the recovery tank, the rotating end of the motor 2 extends into the recovery tank and is fixed with a gear 2, the gear 2 is engaged with the outer gear ring 4, and the outer gear ring 4 is located between the outer gear ring 2 and the outer gear ring 1.

[0012] A further technical solution is that the pulse jet assembly includes a telescopic tube vertically slidably connected to the top of the recovery tank, the telescopic tube is coaxial with the circular hole, a telescopic part 2 is fixed on the top of the recovery tank, the telescopic end of the telescopic part 2 is connected to the telescopic tube, and the top of the telescopic tube is connected to the fan through a hose.

[0013] A further technical solution is that a spiral opening 1 is provided on the side wall of the second mounting sleeve, and a spiral opening 2 is provided on the side wall of the rotating mounting sleeve. The spiral direction of the spiral opening 1 is opposite to that of the spiral opening 2. The rotating mounting sleeve is provided with multiple gas collection covers along its length direction, and the side wall of the gas collection cover is provided with multiple air holes evenly arranged in a ring shape.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. Completely block the secondary attachment of dust: By setting up a movable semicircular plate, a closed cylindrical space is formed during dust cleaning, isolating the bag to be cleaned from the surrounding environment. The dust shaken off by the pulse jet is confined to this closed space and falls directly into the bottom of the recovery tank through the circular hole, avoiding the risk of dust floating and spreading in the box and being adsorbed by adjacent bags, thus eliminating secondary pollution at the root; 2. Deeply enhance the cleaning effect of the bag: Mechanical scrubbing synergy: Utilize the relative movement of the cleaning brush and the rotatable bag to actively scrub the outer wall of the bag and physically remove the compacted dust; 3. Dynamic deformation cleaning: The original reverse-rotating support structure enables the bag to produce controllable and constantly changing local deformation and vibration during the cleaning process. On the one hand, the spiral support rod provides differentiated support, and cooperates with the extrusion of the cleaning brush to effectively break up agglomerated dust; on the other hand, the continuous deformation and vibration greatly promote the overall peeling of the dust layer, solving the problem of incomplete removal of deep or adherent dust.

[0015] 4. Achieve uniform distribution of the spray airflow: Through the counter-rotating motion of spiral mouth 1 and spiral mouth 2, the outlet position (vent) of the spray airflow is dynamically changed, and the airflow is evenly guided to different height areas of the bag through the gas collection cover and the air holes. This "mobile point source" spraying method overcomes the defect of large differences in cleaning effects between the upper and lower parts of the bag caused by traditional top fixed spraying, and ensures the consistency of the cleaning force along the entire length of the bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a dust recovery device for a grinding machine provided by the present invention; Figure 2 The present invention provides Figure 1 Schematic diagram of the internal structure of the recovery tank; Figure 3 The present invention provides Figure 2 Schematic diagram of the structure of the middle cloth bag and semicircular plate; Figure 4 The present invention provides Figure 3 Schematic diagram of the internal structure of the middle cloth bag; Figure 5 The present invention provides Figure 4 Schematic diagram of the structure of the middle installation sleeve and the spiral support rod; Figure 6 The present invention provides Figure 4 The structural diagram of the second installation set; Figure 7 The present invention provides Figure 6 Schematic diagram of the structure when looking up at the tilt angle; Figure 8 The present invention provides Figure 4Schematic diagram of the structure of the installation sleeve.

[0017] In the attached figure: 101, recovery tank; 102, air inlet pipe; 103, exhaust pipe; 104, slag discharge pipe; 105, partition; 106, rotating disk; 107, cloth bag; 108, semicircular plate; 109, telescopic part 1; 110, circular hole; 2, pulse jet assembly; 201, telescopic tube; 202, telescopic part 2; 301, rotating mounting sleeve; 302, cleaning brush; 303, mounting sleeve 1; 304, spiral support rod; 305, mounting sleeve 2; 4, rotating Rotating component one; 401, outer gear ring one; 402, outer gear ring two; 403, rotating ring; 404, motor one; 405, gear one; 406, outer gear ring three; 5. Rotating component two; 501, outer gear ring four; 502, gear two; 503, motor two; 601, spiral mouth one; 602, spiral mouth two; 603, gas collection cover; 604, air hole; 7. Rotating component three; 701, motor three; 702, gear three; 703, outer gear ring five. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0020] like Figure 1 、 Figure 2 and Figure 3As shown, a dust recovery device for a grinding machine provided by an embodiment of the present invention includes a recovery tank 101, and an air inlet pipe 102 and an exhaust pipe 103 connected and installed on the side wall of the recovery tank 101, a slag discharge pipe 104 installed at the bottom of the recovery tank 101, a check valve is installed on the slag discharge pipe 104, the air inlet pipe 102 is connected to the cyclone dust collector, and further includes: a rotating disk 106 rotatably connected in the recovery tank 101, and a partition 105 fixed to the recovery tank 101, the partition 105 and the rotating disk 106 are both located between the air inlet pipe 102 and the exhaust pipe 103, the partition 105 is located below the rotating disk 106, and the recovery tank 101 is provided with a device for driving the rotating disk 106 rotates the rotating component three 7; a plurality of cloth bags 107 are evenly installed in an annular manner on the bottom of the rotating disk 106, a circular hole 110 is provided on the partition 105, and two semicircular plates 108 are slidably connected to the top of the partition 105, and the two semicircular plates 108 are connected to a telescopic member 109, and the telescopic member 109 is extended to drive the semicircular plates 108 to move; when the telescopic member 109 is extended, a cylindrical space is formed in the two semicircular plates 108, and the cloth bags 107 to be cleaned are located in the cylindrical space, and the bottom of the cylindrical space is connected to the circular hole 110, and a pulse jet component 2 is installed on the top of the recovery tank 101, and the pulse jet component 2 is used to spray air to the cloth bags 107 located in the cylindrical space.

[0021] In the embodiment of the present invention, during operation, the dust gas first passes through the cyclone dust collector, which removes large particles of dust from the dust gas. The preliminarily treated dust gas then enters the recovery tank 101 from the air inlet pipe 102, and then enters the interior of the bag 107 from the side wall of the bag 107. The dust is blocked outside the bag 107. The treated gas enters the upper end of the rotating disk 106 and is discharged from the exhaust pipe 103. When the cloth bag 107 needs to be cleaned, the rotating component three 7 drives the rotating disk 106 to rotate, and the rotating disk 106 drives the cloth bag 107 to revolve along its axis until the cloth bag 107 to be cleaned moves to above the circular hole 110, and the telescopic component 109 extends. A cylindrical space is formed within the two semicircular plates 108. The cloth bag 107 to be cleaned is located in the cylindrical space, and the bottom of the cylindrical space is connected to the circular hole 110. The pulse jet component 2 sprays toward the cloth bag 107 located in the cylindrical space, thereby backwashing the cloth bag 107. The dust falling from the side wall of the cloth bag 107 is concentrated in the cylindrical space, and the dust will not spread to the nearby cloth bag 107, thereby avoiding affecting the adjacent cloth bag 107 when the cloth bag 107 is cleaned. The fallen dust enters the lower part of the recovery tank 101 through the circular hole 110.

[0022] like Figure 1 and Figure 2As shown, as a preferred embodiment of the present invention, the rotating component three 7 includes a motor three 701 fixed on the side wall of the recovery tank 101, the rotating end of the motor three 701 is fixedly connected to the gear three 702, the outer gear ring five 703 is embedded on the side wall of the rotating disk 106, and an avoidance groove is provided on the side wall of the recovery tank 101, and the gear three 702 is engaged with the outer gear ring five 703 through the avoidance groove.

[0023] In the embodiment of the present invention, the motor three 701 drives the gear three 702 to rotate, the gear three 702 drives the outer gear ring five 703 to rotate, and the outer gear ring five 703 drives the rotating disk 106 to rotate.

[0024] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 and Figure 7 As shown, as a preferred embodiment of the present invention, a cleaning brush 302 is vertically fixed on the inner wall of the partition 105, a rotating mounting sleeve 301 is rotatably connected to the rotating disk 106, the top opening of the cloth bag 107 is fixed on the rotating mounting sleeve 301, and the top of the rotating mounting sleeve 301 is rotatably connected to a mounting sleeve 1 303, the mounting sleeve 1 303 is located in the cloth bag 107, a spiral support rod 304 is fixed on the side wall of the mounting sleeve 1 303, and a mounting sleeve 2 305 is rotatably connected in the mounting sleeve 1 303, a tray is fixed at the bottom of the mounting sleeve 2 305, and the tray is in contact with the bottom of the inner wall of the cloth bag 107, and a rotating component 1 4 and a rotating component 2 5 are provided on the recovery tank 101, the rotating component 1 4 is used to drive the rotating mounting sleeve 301 and the mounting sleeve 2 305 to rotate, and the rotating component 2 5 is used to drive the mounting sleeve 1 303 to rotate.

[0025] In the embodiment of the present invention, the spiral support rod 304 supports the inner wall of the cloth bag 107. When the telescopic member 109 is extended, a cylindrical space is formed in the two semicircular plates 108. The cloth bag 107 to be cleaned is located in the cylindrical space, and the semicircular plates 108 drive the cleaning brush 302 to rest against the side wall of the cloth bag 107. The rotating component 14 drives the rotating mounting sleeve 301 and the mounting sleeve 2 305 to rotate. The rotating mounting sleeve 301 and the mounting sleeve 2 305 drive the cloth bag 107 to rotate. The rotating component 2 5 drives the mounting sleeve 1 303 to rotate, and the rotation direction of the mounting sleeve 1 303 is opposite to the rotation direction of the cloth bag 107. The mounting sleeve 1 303 drives the spiral support rod 304 to rotate, so that the spiral support rod 304 and the cloth bag 107 rotate in the opposite direction. When the cloth bag 107 rotates, the cleaning brush 302 brushes the cloth bag 107 to clean it. The cleaning brush 302 is against the side wall of the cloth bag 107. When the spiral support rod 304 supports the side wall of the cloth bag 107, due to the spiral design of the spiral support rod 304, the overlapping part of the cleaning brush 302 and the spiral support rod 304 is well supported, and the cloth bag 107 does not deform. The part of the spiral support rod 304 that does not support the cloth bag 107 is squeezed and deformed by the cleaning brush 302, thereby causing the cloth bag 107 to deform, which can break up the dust agglomerated on the cloth bag 107. By rotating the spiral support rod 304 in the opposite direction to the cloth bag 107, the supporting position of the spiral support rod 304 on the cloth bag 107 is changed, thereby changing the deformation position of the cloth bag 107. By continuously changing the supporting position and deformation position of the cloth bag 107, the cloth bag 107 can also be vibrated to shake off the dust, thereby preventing the agglomerated dust from adhering to the cloth bag 107 and being difficult to remove.

[0026] like Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, as a preferred embodiment of the present invention, the rotating component 14 includes an outer gear ring 2 402 fixed by a bracket on the top of the rotating mounting sleeve 301, and an outer gear ring 1 401 fixed by a bracket on the top of the mounting sleeve 2 305, the outer gear ring 2 402 and the outer gear ring 1 401 are both located above the rotating disk 106, and the outer gear ring 2 402 is located below the outer gear ring 1 401, and a rotating ring 403 is rotatably connected in the recovery tank 101, and meshing teeth with both the outer gear ring 1 401 and the outer gear ring 2 402 are fixed on the inner wall of the rotating ring 403, a motor 1 404 is fixed on the side wall of the recovery tank 101, a gear 1 405 is fixed on the rotating end of the motor 1 404, an outer gear ring 3 406 is embedded and fixed on the side wall, and an avoidance groove is provided on the side wall of the recovery tank 101, and the gear 1 405 meshes with the outer gear ring 3 406 through the avoidance groove.

[0027] In an embodiment of the present invention, motor 1 404 drives gear 1 405 to rotate, gear 1 405 drives outer gear ring 3 406 to rotate, outer gear ring 3 406 drives rotating ring 403 to rotate, rotating ring 403 drives outer gear ring 1 401 and outer gear ring 2 402 to rotate synchronously through the inner meshing teeth, outer gear ring 1 401 drives mounting sleeve 2 305 to rotate, outer gear ring 2 402 drives rotating mounting sleeve 301 to rotate, thereby making rotating mounting sleeve 301 and mounting sleeve 2 305 rotate synchronously, rotating mounting sleeve 301 and mounting sleeve 2 305 drive cloth bag 107 to rotate.

[0028] like Figure 1 、 Figure 2 、 Figure 4 and Figure 5As shown, as a preferred embodiment of the present invention, the rotating component 2 5 includes an outer gear ring 4 501 fixed to the top of the mounting sleeve 1 303 through a bracket, and a motor 2 503 is installed on the top of the recovery tank 101. The rotating end of the motor 2 503 extends into the recovery tank 101 and is fixed with a gear 2 502. The gear 2 502 is engaged with the outer gear ring 4 501, and the outer gear ring 4 501 is located between the outer gear ring 2 402 and the outer gear ring 1 401.

[0029] In the embodiment of the present invention, the motor 2 503 drives the gear 2 502 to rotate, the gear 2 502 drives the outer gear ring 4 501 to rotate, and the outer gear ring 4 501 drives the mounting sleeve 1 303 to rotate.

[0030] like Figure 1 、 Figure 2 and Figure 4 As shown, as a preferred embodiment of the present invention, the pulse jet assembly 2 includes a telescopic tube 201 vertically slidably connected to the top of the recovery tank 101, the telescopic tube 201 is coaxial with the circular hole 110, and a telescopic part 202 is fixed on the top of the recovery tank 101, the telescopic end of the telescopic part 202 is connected to the telescopic tube 201, and the top of the telescopic tube 201 is connected to the fan through a hose; a spiral opening 601 is provided on the side wall of the second mounting sleeve 305, and a spiral opening 2 602 is provided on the side wall of the rotating mounting sleeve 301, the spiral direction of the spiral opening 601 is opposite to that of the spiral opening 2 602, and a plurality of gas collection covers 603 are installed on the rotating mounting sleeve 301 along its length direction, and a plurality of air holes 604 are evenly arranged on the side wall of the gas collection cover 603.

[0031] In an embodiment of the present invention, the telescopic member 202 can be an electric telescopic rod or a cylinder. When the bag 107 is sprayed with dust, the telescopic member 202 is extended, and the telescopic member 202 drives the telescopic tube 201 to move downward and insert into the top of the installation sleeve 2 305. The fan and other supply equipment supply air to the installation sleeve 2 305. The overlapping part of the spiral mouth 1 601 and the spiral mouth 2 602 constitutes a vent, and then the gas in the installation sleeve 2 305 is discharged. The pitch and number of spirals of the spiral mouth 1 601 and the spiral mouth 2 602 are the same, and the number of spirals is less than one. As the installation sleeve 1 303 and the installation sleeve 2 305 rotate in opposite directions, the spiral mouth 1 601 and the spiral mouth 2 602 are connected. The second mouth 602 rotates in the opposite direction, thereby changing the overlapping position of the spiral mouth 1 601 and the spiral mouth 2 602, that is, the vent hole changes along the length direction of the installation sleeve 2 305, and the vent hole transports the gas in the installation sleeve 2 305 to the gas collection cover 603 at the corresponding height, and discharges it through multiple air holes 604 on its side, thereby jetting the inner walls of the cloth bag 107 at different heights. By changing the jet height, the jet volume at different heights in the cloth bag 107 can be made the same, which solves the problem of the prior art that the jet is sprayed from the top of the cloth bag 107, the jet degree is different from the top to the bottom of the cloth bag 107, and the cleaning degree of the cloth bag 107 is different from top to bottom.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dust recovery device for a grinding machine, comprising a recovery tank, an air intake pipe and an air exhaust pipe connected and mounted on the side wall of the recovery tank, a slag discharge pipe mounted at the bottom of the recovery tank, a check valve mounted on the slag discharge pipe, and an air intake pipe connected to a cyclone dust collector, characterized in that: Also includes: A rotating disk rotatably connected in the recovery tank, and a partition fixed to the recovery tank, the partition and the rotating disk are both located between the intake pipe and the exhaust pipe, the partition is located below the rotating disk, and the recovery tank is provided with a rotating component three for driving the rotating disk to rotate; A plurality of cloth bags are evenly installed in an annular manner at the bottom of the rotating disk, a circular hole is provided on the partition, and two semicircular plates are slidably connected to the top of the partition, and the two semicircular plates are both connected to a telescopic member 1, and the telescopic member 1 is extended to drive the semicircular plates to move; A pulse jet assembly is installed on the top of the recovery tank, and the pulse jet assembly is used to spray air into the bag located in the cylindrical space.

2. The dust recovery device for a grinding machine according to claim 1, characterized in that: The rotating component three includes a motor three fixed on the side wall of the recovery tank, the rotating end of the motor three is fixedly connected to a gear three, an outer gear ring five is embedded on the side wall of the rotating disk, and an avoidance groove is provided on the side wall of the recovery tank, and the gear three is engaged with the outer gear ring five through the avoidance groove.

3. The dust recovery device for a grinding machine according to claim 1, characterized in that: A cleaning brush is vertically fixed to the inner wall of the partition, a rotating mounting sleeve is rotatably connected to the rotating disk, the top opening of the cloth bag is fixed on the rotating mounting sleeve, the top of the rotating mounting sleeve is rotatably connected to mounting sleeve 1, the mounting sleeve 1 is located in the cloth bag, and a spiral support rod is fixed on one side wall of the mounting sleeve, the mounting sleeve 1 is rotatably connected to the mounting sleeve 2, a tray is fixed to the bottom of the mounting sleeve 2, the tray is in contact with the bottom of the inner wall of the cloth bag, a rotating component 1 and a rotating component 2 are provided on the recovery tank, the rotating component 1 is used to drive the rotating mounting sleeve and the mounting sleeve 2 to rotate, and the rotating component 2 is used to drive the mounting sleeve 1 to rotate.

4. The dust recovery device for a grinding machine according to claim 3, characterized in that: The rotating assembly 1 includes an outer gear ring 2 fixed by a bracket on the top of a rotating mounting sleeve, and an outer gear ring 1 fixed by a bracket on the top of the mounting sleeve 2. The outer gear ring 2 and the outer gear ring 1 are both located above the rotating disk, and the outer gear ring 2 is located below the outer gear ring 1. A rotating ring is rotatably connected in the recovery tank, and meshing teeth that engage with both the outer gear ring 1 and the outer gear ring 2 are fixed on the inner wall of the rotating ring. A motor 1 is fixed on the side wall of the recovery tank, and a gear 1 is fixed on the rotating end of the motor 1. An outer gear ring 3 is embedded and fixed on the side wall. An avoidance groove is provided on the side wall of the recovery tank, and the gear 1 meshes with the outer gear ring 3 through the avoidance groove.

5. The dust recovery device for a grinding machine according to claim 4, characterized in that: The rotating component 2 includes an outer gear ring 4 fixed to the top of the mounting sleeve 1 through a bracket, a motor 2 is installed on the top of the recovery tank, the rotating end of the motor 2 extends into the recovery tank and is fixed with a gear 2, the gear 2 is engaged with the outer gear ring 4, and the outer gear ring 4 is located between the outer gear ring 2 and the outer gear ring 1.

6. The dust recovery device for a grinding machine according to claim 3, characterized in that: The pulse jet assembly includes a telescopic tube vertically slidably connected to the top of the recovery tank, the telescopic tube is coaxial with the circular hole, a second telescopic part is fixed on the top of the recovery tank, the telescopic end of the second telescopic part is connected to the telescopic tube, and the top of the telescopic tube is connected to the fan through a hose.

7. The dust recovery device for a grinding machine according to claim 6, characterized in that: A spiral opening 1 is provided on the side wall of the second mounting sleeve, and a spiral opening 2 is provided on the side wall of the rotating mounting sleeve. The spiral direction of the spiral opening 1 is opposite to that of the spiral opening 2. A plurality of gas collection covers are installed on the rotating mounting sleeve along its length direction, and a plurality of air holes are evenly arranged in an annular shape on the side wall of the gas collection cover.

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