A turnover, blowing and suction type powder metallurgy dust removal equipment

Abstract

The application provides a turnover and blowing and sucking type powder metallurgy dust removal equipment and relates to the technical field of industrial dust removal. A lifting plate is arranged in a shell, a nozzle and an auxiliary part are arranged on the lifting plate, the auxiliary part comprises a diaphragm, an outer supporting piece and an inner supporting piece; when the bag is cleaned, the lifting plate is first lowered to a preset position, the outer supporting piece presses the outer layer section on the upper end of the bag to block the bag opening, the high-pressure gas blown by the nozzle directly enters the bag through the diaphragm to avoid escaping from the bag opening, the gas flow utilization rate and the stripping force on the dust are improved, and the dust cleaning effect is ensured. The lifting plate is further lowered from the preset position, the inner supporting piece moves relative to the outer supporting piece and makes the diaphragm synchronously extend into the bag, the actual outlet of the high-pressure gas is synchronously lowered, the inner supporting piece produces a stroking action on the diaphragm from top to bottom, the inner layer section is converted into the outer layer section through the transition section, the part of the upper section of the bag that has been cleaned is laterally covered, the dust cleaning intensity on the lower section of the bag is ensured, and the dust cleaning effect and the dust cleaning uniformity of the bag are improved.

Description

Technical Field

[0001] This invention relates to the field of industrial dust removal technology, and in particular to a rotary, blowing and suction type dust removal device for powder metallurgy. Background Technology

[0002] In automated sintering production lines for powder metallurgy products, common equipment configurations include a tray-retrieving mechanism for temporarily storing and conveying green billets, and an automatic feeding unit for placing the green billets onto the sintering mesh belt. Before the material is placed on the sintering mesh belt, the loose powder adhering to its surface usually needs to be cleaned to avoid contaminating the furnace and affecting the quality of the final product. For this purpose, the equipment also needs to be equipped with a blowing and suction cleaning mechanism, which uses jet gas to lift the powder and simultaneously collects the generated dust-laden air using a negative pressure suction system. The collected high-concentration dust gas needs to undergo centralized purification treatment. Currently, the industry commonly uses baghouse dust collectors as the final treatment equipment, connecting their inlet to the exhaust end of the aforementioned negative pressure suction system. The internal filter bags use sieving and interception mechanisms to separate and capture solid particles in the gas, thereby achieving purified gas emissions that meet environmental protection and production environment requirements.

[0003] Existing baghouse dust collectors typically spray high-pressure gas downwards from the top of the filter bags to clean them. However, some of this high-pressure gas does not fully act on the sidewalls of the bags after being sprayed, instead escaping directly from the bag openings. This reduces airflow utilization and the dust removal force, affecting the cleaning effect. Furthermore, the kinetic energy of the high-pressure gas gradually decreases as it propagates downwards, weakening the cleaning intensity on the lower section of the bag. This results in uneven cleaning between the upper and lower parts of the bag, leading to a higher level of dust residue at the bottom.

[0004] The information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] Therefore, it is necessary to provide a rotary, blowing and suction type dust removal device for powder metallurgy, which addresses the problems existing in current baghouse dust collectors.

[0006] The above objectives are achieved through the following technical solutions:

[0007] A tilting, blowing, and suction type dust removal device for powder metallurgy includes a shell with a horizontal tube sheet inside. Multiple cylindrical filter bags are arrayed on the tube sheet for removing dust-laden gas. The lower ends of the filter bags are sealed and extend below the tube sheet, while the upper ends have openings that extend above the tube sheet. A lifting plate is also provided inside the shell, with multiple nozzles arrayed on the lifting plate for blowing high-pressure gas into the filter bags from top to bottom. An auxiliary part is provided around each nozzle on the lifting plate, including a diaphragm made of a soft material and outer and inner supports located outside the diaphragm. The diaphragm is cylindrical and includes an inner section. The inner layer consists of a transition section and an outer layer section. The upper end of the inner layer section covers the nozzle, and the upper end of the outer layer section is fixed to the lower end of the outer support. The transition section connects the lower ends of the inner and outer layers. The upper end of the outer support slides up and down with the lifting plate, and the upper end of the inner support is fixed to the lifting plate, while the lower end abuts against the transition section. When the lifting plate descends to the preset position, the outer support presses the outer layer section onto the upper end of the bag to seal the bag opening. When the lifting plate continues to descend from the preset position, the inner support moves relative to the outer support and causes the diaphragm to extend into the bag. The inner support also exerts a downward stroking action on the diaphragm, causing the inner layer section to be converted into the outer layer section via the transition section.

[0008] Furthermore, a sensor coaxial with the filter bag is slidably mounted on the tube sheet. When the dust-laden gas rises along the filter bag, it can apply an upward first force to the sensor. An elastic element and a locking element are provided between the tube sheet and the sensor. The elastic element is used to make the sensor tend to move upward relative to the tube sheet. The locking element has a locked state and a released state. When it is in the locked state, the locking element restricts the upward movement of the sensor relative to the tube sheet. When it is in the released state, the locking element releases the restriction on the sensor, and the elastic element makes the sensor move upward relative to the tube sheet and press it against the outer layer to seal the bag opening. When the first force is less than a preset value, the locking element is in the locked state. When the first force is greater than or equal to the preset value, the locking element is in the released state.

[0009] Furthermore, the sensing element includes an outer ring and an inner ring continuously arranged along its radial direction; the outer ring can contact the outer layer to seal the bag opening, and the inner ring extends into the bag from top to bottom and is tapered with a larger top and a smaller bottom.

[0010] Furthermore, the bag is cone-shaped, with a smaller top and a larger bottom.

[0011] Furthermore, a sliding cylinder coaxial with the cloth bag is slidably provided on the pattern plate. The sliding cylinder is fixedly sleeved on the cloth bag, and the outer ring is slidably connected to the sliding cylinder. The elastic element is located between the pattern plate and the sliding cylinder.

[0012] Furthermore, the locking component includes a first latch fixed to the outer ring and a second latch fixed to the flower plate. When the locking component is in the locked state, the first latch and the second latch are engaged. When the locking component is in the released state, the first latch and the second latch are disengaged.

[0013] Furthermore, both the first and second buckles are evenly distributed in multiples along the circumference of the bag.

[0014] Furthermore, the inner support is a compression spring and is coaxially sleeved on the inner layer section.

[0015] Furthermore, the outer support includes an outer rod and a bottom ring. Multiple outer rods are evenly distributed along the circumference of the diaphragm. The outer rods are slidably connected to the lifting plate. The bottom ring is coaxial with the diaphragm and fixed to the lower end of the outer rod. The outer layer is fixed to the lower surface of the bottom ring. When the lifting plate descends to the preset position, the bottom ring presses the outer layer onto the upper end of the bag to seal the bag opening.

[0016] Furthermore, the upper surface of the outer ring and the lower surface of the bottom ring are both planar.

[0017] The present invention has at least the following beneficial effects:

[0018] (1) When cleaning the filter bag, the lifting plate first descends to the preset position, and the outer support presses the outer layer section onto the upper end of the filter bag to seal the bag opening. The high-pressure gas sprayed by the nozzle enters the filter bag directly through the diaphragm, preventing it from escaping from the bag opening, improving the airflow utilization rate and the dust removal force, and ensuring the cleaning effect. The lifting plate then continues to descend from the preset position, and the inner support moves relative to the outer support and causes the diaphragm to extend into the filter bag synchronously, so that the actual outlet of the high-pressure gas moves down synchronously. At the same time, the inner support generates a top-to-bottom stroking effect on the diaphragm, so that the inner layer section is transformed into the outer layer section through the transition section, so as to laterally cover the cleaned part of the upper section of the filter bag, ensuring the cleaning intensity of the lower section of the filter bag, improving the cleaning effect and cleaning uniformity of the filter bag.

[0019] (2) When the dust-laden gas moves upward along the filter bag, it can apply an upward first force to the sensing element. When the first force is less than the preset value, it indicates that the filter bag is not damaged and the locking element is in the locked state. The locking element restricts the sensing element from moving upward relative to the tube sheet. When the first force is greater than or equal to the preset value, it indicates that the filter bag is damaged and the locking element is in the released state. The locking element cancels the restriction on the sensing element, and the elastic element causes the sensing element to move upward relative to the tube sheet and press against the outer layer to seal the bag opening. Since the nozzle above the diaphragm is spraying high-pressure gas, it can seal the outlet of the damaged filter bag, so that the dust-laden gas does not enter the damaged filter bag, thereby avoiding the leakage of unfiltered dust-laden gas to the outside to a certain extent and ensuring the filtration effect.

[0020] (3) Using a tapered filter bag with a smaller top and a larger bottom can, to some extent, prevent the high-pressure gas from blowing directly onto the side wall of the filter bag when the axis of the filter bag deviates from the path of the high-pressure gas, thus avoiding damage to the filter bag. In addition, for traditional cylindrical filter bags, as the inner support moves relative to the outer support and the diaphragm extends into the filter bag synchronously, the actual outlet of the high-pressure gas moves downward synchronously, and the space in the lower section of the filter bag becomes smaller and smaller, while the flow rate of the high-pressure gas remains unchanged, which can easily damage the filter bag. Therefore, by using a tapered filter bag, the axial dimension of the space in the lower section of the filter bag becomes smaller and smaller, while the radial dimension becomes larger and larger, which can, to some extent, avoid damage to the filter bag.

[0021] (4) When the high-pressure gas is sprayed downward, the elastic element and the slide tube cooperate with each other to allow the cloth bag to move downward with the slide tube, so as to buffer the thrust applied by the high-pressure gas and avoid damage to the cloth bag to a certain extent. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the tilting, blowing and suction type powder metallurgy dust removal equipment provided in an embodiment of the present invention;

[0023] Figure 2 for Figure 1 A sectional view;

[0024] Figure 3 for Figure 1 Side view;

[0025] Figure 4 for Figure 3 Sectional view along axis AA;

[0026] Figure 5 for Figure 4 A magnified view of a section at point B in the middle;

[0027] Figure 6 This is a diagram showing the state of the filter bag during the dust removal process;

[0028] Figure 7 for Figure 6 A magnified view of a section at point C.

[0029] in:

[0030] 101. Shell; 102. Tube plate; 103. Filter bag; 104. Nozzle; 105. Air inlet; 106. Air outlet; 107. Negative pressure fan; 108. Compression pump; 109. Ash hopper; 110. Support frame;

[0031] 201. Lifting plate; 202. Diaphragm; 203. Outer support; 204. Inner support; 205. Inner section; 206. Transition section; 207. Outer section; 208. Outer rod; 209. Bottom ring;

[0032] 301. Sensing element; 302. Elastic element; 303. Locking element; 304. Outer ring; 305. Inner ring; 306. Slide cylinder; 307. First buckle; 308. Second buckle; 309. First wedge; 310. Second wedge. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0034] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] like Figures 1 to 7As shown, this embodiment of the invention provides a tilting, blowing-suction type powder metallurgy dust removal device, including a housing 101. A horizontal tube sheet 102 is provided inside the housing 101. Multiple cylindrical filter bags 103 are arrayed on the tube sheet 102 for removing dust-laden gas. The lower ends of the filter bags 103 are sealed and extend below the tube sheet 102, while the upper ends of the filter bags 103 have openings that extend above the tube sheet 102. A lifting plate 201 is also provided inside the housing 101. Multiple nozzles 104 are arrayed on the lifting plate 201. The nozzles 104 are used to spray high-pressure gas into the filter bags 103 from top to bottom. An auxiliary part is provided around each nozzle 104 on the lifting plate 201. The auxiliary part includes a diaphragm 202 made of a soft material, an outer support 203, and an inner support 204 located outside the diaphragm 202. The diaphragm 202 is cylindrical and includes an inner section 205 and a... The transition section 206 and the outer layer section 207 are connected by the transition section 206. The upper end of the inner layer section 205 covers the nozzle 104. The upper end of the outer layer section 207 is fixed to the lower end of the outer support member 203. The transition section 206 is used to connect the lower end of the inner layer section 205 and the lower end of the outer layer section 207. The upper end of the outer support member 203 is slidably connected to the lifting plate 201. The upper end of the inner support member 204 is fixed to the lifting plate 201, and the lower end abuts against the transition section 206. When the lifting plate 201 descends to the preset position, the outer support member 203 presses the outer layer section 207 onto the upper end of the cloth bag 103 to seal the bag opening. When the lifting plate 201 continues to descend from the preset position, the inner support member 204 moves relative to the outer support member 203 and causes the diaphragm 202 to extend into the cloth bag 103. The inner support member 204 also exerts a downward stroking action on the diaphragm 202, so that the inner layer section 205 is converted into the outer layer section 207 through the transition section 206.

[0037] During the cleaning of the filter bag 103, the lifting plate 201 first descends to a preset position. The outer support 203 presses the outer section 207 onto the upper end of the filter bag 103 to seal the bag opening. The high-pressure gas sprayed by the nozzle 104 enters the filter bag 103 directly through the diaphragm 202, preventing it from escaping from the bag opening, improving airflow utilization and dust removal force, and ensuring the cleaning effect. The lifting plate 201 then continues to descend from the preset position. The inner support 204 moves relative to the outer support 203, causing the diaphragm 202 to extend into the filter bag 103 simultaneously. This causes the actual outlet of the high-pressure gas to move downwards synchronously. At the same time, the inner support 204 exerts a downward stroking effect on the diaphragm 202, causing the inner section 205 to transform into the outer section 207 via the transition section 206. This provides lateral coverage to the already cleaned portion of the upper section of the filter bag 103, ensuring the cleaning intensity of the lower section of the filter bag 103, and improving the cleaning effect and uniformity of the filter bag 103.

[0038] The tube sheet 102 divides the chambers within the housing 101 into a lower dust removal chamber and an upper clean chamber, with the lifting plate 201 located in the clean chamber. The bottom of the housing 101 has multiple support legs. The lower part of the housing 101 has an air inlet 105 for introducing dust-laden gas, and the upper part has an air outlet 106 connected to a negative pressure fan 107. The dust-laden gas enters the dust removal chamber through the air inlet 105 and rises, passing from the outside of the filter bag 103 to the inside. Dust remains on the outside of the filter bag 103, while clean gas is obtained inside, completing the dust removal process. The obtained clean gas enters the clean chamber and is extracted from the air outlet 106 by the negative pressure fan 107. The housing 101 is also equipped with a compression pump 108, which is connected to each nozzle 104 via pipelines (not shown) to provide high-pressure air to the nozzles 104. The pipelines may have a corrugated structure to accommodate the deformation caused by the movement of the lifting plate 201. When cleaning the filter bag 103, the nozzles 104 blow high-pressure gas into the filter bag 103 from top to bottom, blowing off the dust adhering to the outside of the filter bag 103. The bottom of the housing 101 is equipped with a dust hopper 109 that communicates with the dust removal chamber, and the blown-off dust falls into the dust hopper 109 for centralized collection. The housing 101 is also equipped with a drive unit (not shown), which may be a hydraulic cylinder or an electric push rod, etc., for driving the lifting plate 201 to move up and down along the inner wall of the housing 101, and the lifting plate 201 slides and seals against the housing 101. The negative pressure fan 107, the compression pump 108, and the drive unit are all equipped with corresponding power sources and control modules to control start-up, shutdown, and operating conditions. The structure and working principle of the bag filter described above are existing technologies and will not be elaborated here.

[0039] In addition, the automated sintering production line for powder metallurgy products mainly includes a tray-retrieving mechanism, a blowing and suction cleaning mechanism, an automatic feeding unit, and a sintering mesh belt. The tray-retrieving mechanism is used to temporarily store and transport green billets. The blowing and suction cleaning mechanism uses sprayed gas to lift the powder adhering to the surface of the green billets and simultaneously collects the generated dust-laden gas using a negative pressure suction system. The automatic feeding unit places the green billets onto the sintering mesh belt for sintering. The air inlet 105 is connected to the exhaust end of the aforementioned negative pressure suction system to transport the dust-laden gas to the dust removal chamber inside the housing 101, where the filter bag 103 captures the powder in the gas, thereby achieving dust removal and purified gas emission.

[0040] It is understandable that the transition between the inner section 205, the transition section 206, and the outer section 207 is similar to the track operation of special vehicles in the prior art. The inner support member 204 exerts a downward stroking effect on the diaphragm 202, which can be understood as the stroking, supporting, and guiding effect of the wheels on the tracks, so that the contact position between the tracks and the ground gradually changes. In addition, the diaphragm 202 can be made of rubber. When the inner section 205 transitions to the outer section 207 via the transition section 206, the diaphragm 202 undergoes slight deformation in its radial direction, but cannot deform in its axial direction. That is to say, the axial dimension and length of the diaphragm 202 remain unchanged.

[0041] In one embodiment, a sensor 301, coaxial with the bag 103, is slidably mounted on the tube sheet 102. When the dust-laden gas rises along the bag 103, it can apply an upward first force to the sensor 301. An elastic member 302 and a locking member 303 are provided between the tube sheet 102 and the sensor 301. The elastic member 302 is used to make the sensor 301 tend to move upward relative to the tube sheet 102. The locking member 303 has a locked state and a released state. When it is in the locked state, the locking member 303 restricts the sensor 301 from moving upward relative to the tube sheet 102. When it is in the released state, the locking member 303 releases the restriction on the sensor 301, and the elastic member 302 makes the sensor 301 move upward relative to the tube sheet 102 and press it against the outer layer 207 to seal the bag opening. When the first force is less than a preset value, the locking member 303 is in the locked state. When the first force is greater than or equal to the preset value, the locking member 303 is in the released state.

[0042] If the filter bag 103 is damaged during the dust removal process of the existing bag filter, a large amount of unfiltered dust-laden gas will leak into the outside world, affecting the filtration effect. When the dust-laden gas rises along the filter bag 103, it applies an upward first force to the sensor 301. When the first force is less than a preset value, it indicates that the filter bag 103 is not damaged, and the locking member 303 is in a locked state, restricting the sensor 301 from moving upward relative to the tube sheet 102. When the first force is greater than or equal to the preset value, it indicates that the filter bag 103 is damaged, and the locking member 303 switches to a released state, releasing the restriction on the sensor 301. The elastic member 302 causes the sensor 301 to move upward relative to the tube sheet 102 and press against the outer section 207 to seal the bag opening. Since the nozzle 104 above the diaphragm 202 is spraying high-pressure gas, it can seal the outlet of the damaged filter bag 103, preventing the dust-laden gas from entering the damaged filter bag 103. This, to a certain extent, prevents unfiltered dust-laden gas from leaking to the outside, ensuring the filtration effect.

[0043] Understandably, when the filter bag 103 is intact, dust-laden gas enters from the outside of the filter bag 103 to the inside, leaving the dust on the outside and clean gas on the inside. Therefore, when the dust-laden gas passes through the filter bag 103, the filter bag 103 provides some resistance. However, as the dust-laden gas moves upward along the filter bag 103, it still exerts an upward first force on the sensor 301, albeit a small one. When the filter bag 103 is damaged, the dust-laden gas tends to enter from the damaged area to the inside of the filter bag 103. The resistance effect of the filter bag 103 on the dust-laden gas is significantly reduced. Therefore, when the dust-laden gas moves upward along the filter bag 103, it exerts a larger upward first force on the sensor 301, which is greater than or equal to a preset value.

[0044] The elastic element 302 is a compression spring, which causes the sensing element 301 to tend to move upward relative to the perforated plate 102. Optionally, based on the elastic element 302, in order to facilitate the sensing element 301 to move upward relative to the perforated plate 102 and press against the outer layer section 207 to seal the bag opening when the locking element 303 is in the released state, the outer support 203 or the sensing element 301 may be configured to be magnetic, so that the two can attract each other when they are close together.

[0045] In one embodiment, the sensing element 301 includes an outer ring 304 and an inner ring 305 continuously arranged radially thereon; the outer ring 304 can contact the outer layer segment 207 to seal the bag opening, and the inner ring 305 extends into the cloth bag 103 from top to bottom and is tapered with a larger top and a smaller bottom. The inner ring 305 has a certain angle with the inner side of the cloth bag 103. When the dust-laden gas rises along the cloth bag 103, part of the dust-laden gas will be blown between the inner ring 305 and the inner side of the cloth bag 103, thereby applying an upward first force to the inner ring 305.

[0046] The inner ring 305 is a cone shape with a larger top and a smaller bottom. Its taper should not be too large, so that most of the dust-laden gas flows upward from the center of the inner ring 305, while a small portion of the dust-laden gas is blown between the inner ring 305 and the inner side of the filter bag 103, in order to ensure the dust removal effect.

[0047] In one embodiment, the bag 103 is cone-shaped, with a smaller top and a larger bottom.

[0048] In existing baghouse dust collectors, when the high-pressure gas flow rate is large during cleaning, the resulting force can cause slight deformation of the tube sheet 102, leading to a deviation between the axis of the filter bag 103 and the path of the high-pressure gas. This causes the high-pressure gas to blow directly onto the sidewall of the filter bag 103, potentially damaging it. This application uses a tapered filter bag 103, which is smaller at the top and larger at the bottom. When the axis of the filter bag 103 deviates from the path of the high-pressure gas, it can, to a certain extent, prevent the high-pressure gas from blowing directly onto the sidewall of the filter bag 103, thus avoiding damage. In addition, for the traditional cylindrical filter bag 103, during the process of the inner support member 204 moving relative to the outer support member 203 and the diaphragm 202 extending into the filter bag 103 simultaneously, the actual outlet of the high-pressure gas moves downward simultaneously, and the lower space of the filter bag 103 becomes smaller and smaller, while the high-pressure gas flow rate remains unchanged, which can easily damage the filter bag 103. Therefore, a conical filter bag 103 is adopted, in which the axial dimension of the lower space of the filter bag 103 becomes smaller and smaller, while the radial dimension becomes larger and larger, which can avoid damage to the filter bag 103 to a certain extent.

[0049] In one embodiment, a slide cylinder 306 coaxial with the cloth bag 103 is slidably provided on the pattern plate 102. The slide cylinder 306 is fixedly sleeved on the cloth bag 103. The outer ring 304 is slidably connected to the slide cylinder 306. The elastic element 302 is located between the pattern plate 102 and the slide cylinder 306.

[0050] When high-pressure gas is sprayed downwards, it exerts a downward thrust on the fabric bag 103, which may damage the fabric bag 103. When high-pressure gas is sprayed downwards, the elastic element 302 and the slide cylinder 306 cooperate with each other to allow the fabric bag 103 to move downwards with the slide cylinder 306, so as to buffer the thrust exerted by the high-pressure gas and avoid damage to the fabric bag 103 to a certain extent.

[0051] The slide cylinder 306 is slidably sealed with the tube sheet 102, and a limiting member is provided at the lower end of the slide cylinder 306 to limit the upward sliding stroke of the slide cylinder 306.

[0052] In one embodiment, the locking member 303 includes a first buckle 307 fixed to the outer ring 304 and a second buckle 308 fixed to the flower plate 102. When the locking member 303 is in the locked state, the first buckle 307 and the second buckle 308 are engaged. When the locking member 303 is in the released state, the first buckle 307 and the second buckle 308 are separated.

[0053] The bag 103 has an internal support 110 for supporting it. The upper end of the support 110 and the upper end of the bag 103 are fixed together between the slide cylinder 306 and the outer ring 304. The first buckle 307 extends downward from the outer ring 304, and the slide cylinder 306 has a groove corresponding to the first buckle 307, allowing the outer ring 304 and the slide cylinder 306 to slide together. The first buckle 307 is located outside the second buckle 308, which extends upward from the perforated plate 102 and is capable of deformation and resetting. A first wedge 309 is formed on the inner side of the first latch 307. The upper surface of the first wedge 309 is an inclined surface that slopes from top to bottom and from outside to inside. A second wedge 310 is formed on the outer side of the second latch 308. The upper surface of the second wedge 310 is an inclined surface that slopes from top to bottom and from inside to outside. When the locking member 303 is in the locked state, the first wedge 309 is located below the second wedge 310. When the locking member 303 switches from the locked state to the released state, the first latch 307 and the first wedge 309 move upward, and the inclined surface of the first wedge 309 intersects with the inclined surface of the second wedge 308. The tips of the first wedge 309 move relative to each other, causing the second wedge 310 to deform inward until the first wedge 309 moves above the second wedge 310, thereby releasing the locking member 303. When the locking member 303 switches from the released state to the locked state, the first latch 307 and the first wedge 309 move downward, and the tip of the first wedge 309 moves relative to the inclined surface of the second wedge 310, causing the second wedge 310 to deform inward until the first wedge 309 moves above the second wedge 310, thereby locking the locking member 303.

[0054] In one embodiment, multiple first buckles 307 and second buckles 308 are evenly distributed along the circumference of the bag 103 to ensure the engaging effect of the first buckles 307 and the second buckles 308 and avoid connection failure.

[0055] In one embodiment, the inner support 204 is a compression spring and is coaxially sleeved on the inner layer section 205 to maintain a downward force applied to the transition section 206 and generate a smoothing effect on it, while also buffering and resetting the switching between the inner layer section 205, the transition section 206 and the outer layer section 207.

[0056] It is understandable that when the inner support 204 moves relative to the outer support 203, the inner support 204 transmits the force of the lifting plate 201 in the vertical direction, and the inner support 204 can only deform in its axial direction, so it can apply a downward force to the transition section 206 and produce a smoothing effect on it.

[0057] In one embodiment, the outer support 203 includes an outer rod 208 and a bottom ring 209. Multiple outer rods 208 are evenly distributed along the circumference of the diaphragm 202. The outer rods 208 are slidably connected to the lifting plate 201. The bottom ring 209 is coaxial with the diaphragm 202 and fixed to the lower end of the outer rods 208. The outer layer section 207 is fixed to the lower surface of the bottom ring 209. When the lifting plate 201 descends to the preset position, the bottom ring 209 presses the outer layer section 207 onto the upper end of the cloth bag 103 to seal the bag opening.

[0058] When cleaning the filter bag 103, the lifting plate 201 first descends to the preset position, and the bottom ring 209 presses the outer layer 207 onto the upper end of the filter bag 103 to seal the bag opening. The lifting plate 201 then continues to descend from the preset position, and the inner support 204 continues to descend with the lifting plate 201, while the outer rod 208 remains stationary, so that the bottom ring 209 maintains the state of pressing the outer layer 207.

[0059] The upper end of the outer rod 208 is provided with a limiting member to limit the downward sliding stroke of the outer rod 208.

[0060] In one embodiment, the upper surface of the outer ring 304 and the lower surface of the bottom ring 209 are both planar to increase the contact area between the outer layer segment 207 and the outer ring 304, thereby ensuring the airtightness of the bag opening.

[0061] Of course, the upper surface of the outer ring 304 and the lower surface of the bottom ring 209 can also be curved or other shapes, which is not limited here.

[0062] The working principle of this invention is as follows:

[0063] During dust removal, dust-laden gas enters the dust removal chamber through the inlet 105 and rises. The dust-laden gas enters the inner side of the filter bag 103 from the outside, leaving the dust on the outside of the filter bag 103. Clean gas is obtained on the inside of the filter bag 103 to complete the dust removal process. The obtained clean gas enters the clean chamber and is drawn out from the outlet 106 by the negative pressure fan 107. When the dust-laden gas rises along the filter bag 103, it can exert an upward first force on the sensing element 301. When the filter bag 103 is not damaged, the filter bag 103 has a certain obstruction effect on the dust-laden gas. At this time, the first force is less than the preset value, and the locking element 303 is in the locked state. The locking element 303 restricts the upward movement of the sensing element 301 relative to the tube sheet 102 to carry out the normal dust removal process. When the filter bag 103 is damaged, the dust-laden gas tends to enter the inside of the filter bag 103 from the damaged area. The obstruction effect of the filter bag 103 on the dust-laden gas is greatly reduced. Therefore, when the dust-laden gas rises along the filter bag 103, it exerts a large upward first force on the sensing element 301, which is greater than or equal to the preset value. The locking element 303 switches to the released state, and the locking element 303 removes the restriction on the sensing element 301. The elastic element 302 causes the sensing element 301 to move upward relative to the tube sheet 102. The outer ring 304 presses against the outer layer section 207 to seal the bag opening. Since the nozzle 104 above the diaphragm 202 is blowing high-pressure gas, it can seal the air outlet of the damaged filter bag 103, so that the dust-laden gas does not enter the damaged filter bag 103. This, to a certain extent, prevents the unfiltered dust-laden gas from leaking to the outside and ensures the filtration effect.

[0064] During the cleaning of the filter bag 103, the lifting plate 201 first descends to a preset position. The outer support 203 presses the outer section 207 onto the upper end of the filter bag 103 to seal the bag opening. The high-pressure gas sprayed by the nozzle 104 enters the filter bag 103 directly through the diaphragm 202, preventing it from escaping from the bag opening, improving airflow utilization and dust removal force, and ensuring the cleaning effect. The lifting plate 201 then continues to descend from the preset position. The inner support 204 moves relative to the outer support 203, causing the diaphragm 202 to extend into the filter bag 103 simultaneously. This causes the actual outlet of the high-pressure gas to move downwards synchronously. At the same time, the inner support 204 exerts a downward stroking effect on the diaphragm 202, causing the inner section 205 to transform into the outer section 207 via the transition section 206. This provides lateral coverage to the already cleaned portion of the upper section of the filter bag 103, ensuring the cleaning intensity of the lower section of the filter bag 103, and improving the cleaning effect and uniformity of the filter bag 103. Meanwhile, the filter bag 103 adopts a tapered design that is smaller at the top and larger at the bottom. When the axis of the filter bag 103 deviates from the path of the high-pressure gas, it can, to a certain extent, prevent the high-pressure gas from blowing directly onto the side wall of the filter bag 103, thus avoiding damage to the filter bag 103. In addition, for the traditional cylindrical filter bag 103, during the process of the inner support member 204 moving relative to the outer support member 203 and the diaphragm 202 extending into the filter bag 103 simultaneously, the actual outlet of the high-pressure gas moves downward simultaneously, and the space in the lower section of the filter bag 103 becomes smaller and smaller, while the flow rate of the high-pressure gas remains unchanged, which can easily damage the filter bag 103. Therefore, by adopting a tapered filter bag 103, the axial dimension of the space in the lower section of the filter bag 103 becomes smaller and smaller, while the radial dimension becomes larger and larger, which can, to a certain extent, avoid damage to the filter bag 103.

[0065] When high-pressure gas is sprayed downwards, it applies a downward thrust to the cloth bag 103. The elastic element 302 and the slide cylinder 306 cooperate with each other to allow the cloth bag 103 to move downwards with the slide cylinder 306, so as to buffer the thrust applied by the high-pressure gas and further avoid damage to the cloth bag 103.

[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A tilting, blowing, and suction type dust removal device for powder metallurgy, characterized in that, The device includes a housing with a horizontal perforated plate inside. Multiple cylindrical filter bags, arranged in an array on the perforated plate, are used for dust removal from dust-laden gas. The lower ends of the filter bags are sealed and extend below the perforated plate, while the upper ends of the filter bags have openings that extend above the perforated plate. The housing also includes a lifting plate with multiple nozzles arranged in an array on the lifting plate. These nozzles spray high-pressure gas into the filter bags from top to bottom. An auxiliary part surrounds each nozzle on the lifting plate. This auxiliary part includes a diaphragm made of a soft material and an outer support and an inner support located outside the diaphragm. The diaphragm is cylindrical and includes an inner section, a transition section, and an outer section. The upper end of the inner section covers the nozzle, the upper end of the outer section is fixed to the lower end of the outer support, the transition section connects the lower ends of the inner and outer sections, the upper end of the outer support slides vertically with the lifting plate, and the upper end of the inner support is fixed to the lifting plate, while its lower end abuts against the transition section. When the lifting plate descends to the preset position, the outer support presses the outer layer section onto the top of the bag to seal the bag opening. When the lifting plate continues to descend from the preset position, the inner support moves relative to the outer support and causes the diaphragm to extend into the bag. The inner support also exerts a downward stroking action on the diaphragm, causing the inner layer section to be converted into the outer layer section via the transition section.

2. The tilting, blowing, and suction type powder metallurgy dust removal equipment according to claim 1, characterized in that, A sensor, coaxial with the filter bag, slides on the tube sheet. When the dust-laden gas rises along the filter bag, it applies an upward force to the sensor. An elastic element and a locking element are provided between the tube sheet and the sensor. The elastic element causes the sensor to tend to move upward relative to the tube sheet. The locking element has a locked state and a released state. When locked, the locking element restricts the upward movement of the sensor relative to the tube sheet. When released, the locking element releases the restriction on the sensor, and the elastic element causes the sensor to move upward relative to the tube sheet and press against the outer layer to seal the bag opening. When the first force is less than a preset value, the locking element is in the locked state. When the first force is greater than or equal to the preset value, the locking element is in the released state.

3. The tilting, blowing, and suction type powder metallurgy dust removal equipment according to claim 2, characterized in that, The sensing element includes an outer ring and an inner ring continuously arranged along its radial direction; the outer ring can contact the outer layer to seal the bag opening, and the inner ring extends into the bag from top to bottom and is tapered with a larger top and a smaller bottom.

4. The tilting, blowing, and suction type powder metallurgy dust removal equipment according to claim 1, characterized in that, The bag is cone-shaped, wider at the bottom than at the top.

5. The tilting, blowing, and suction type powder metallurgy dust removal equipment according to claim 3, characterized in that, A sliding cylinder coaxial with the cloth bag is provided on the tube sheet. The sliding cylinder is fixedly sleeved on the cloth bag, and the outer ring is slidably connected to the sliding cylinder. An elastic element is located between the tube sheet and the sliding cylinder.

6. The tilting, blowing, and suction type powder metallurgy dust removal equipment according to claim 3, characterized in that, The locking component includes a first buckle fixed to the outer ring and a second buckle fixed to the flower plate. When the locking component is in the locked state, the first buckle and the second buckle are engaged. When the locking component is in the released state, the first buckle and the second buckle are disengaged.

7. The tilting, blowing, and suction type powder metallurgy dust removal equipment according to claim 6, characterized in that, Both the first and second buckles are evenly distributed in multiples along the circumference of the bag.

8. The tilting, blowing, and suction type powder metallurgy dust removal equipment according to claim 3, characterized in that, The inner support is a compression spring and is coaxially sleeved on the inner layer section.

9. The tilting, blowing, and suction type powder metallurgy dust removal equipment according to claim 3, characterized in that, The outer support includes an outer rod and a bottom ring. Multiple outer rods are evenly distributed along the circumference of the diaphragm. The outer rods are slidably connected to the lifting plate. The bottom ring is coaxial with the diaphragm and fixed to the lower end of the outer rod. The outer layer is fixed to the lower surface of the bottom ring. When the lifting plate descends to the preset position, the bottom ring presses the outer layer onto the upper end of the bag to seal the bag opening.

10. The tilting, blowing, and suction type powder metallurgy dust removal equipment according to claim 9, characterized in that, The upper surface of the outer ring and the lower surface of the bottom ring are both flat.

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