A dust collection and recovery mechanism for a plastering mortar production line

Abstract

The present invention discloses a dust collection and recovery mechanism for a plastering mortar production line, specifically a building material production equipment, including a dry mixer and a feed pipe, and also including an intervening pipe arranged between the dry mixer and the feed pipe, wherein the intervening pipe is provided with: a symmetrical combined filter cloth; an exhaust mechanism, which includes a negative pressure hood covered on the combined filter cloth; wherein the negative pressure hood intermittently exhausts air. When the proportioned powder is mixed into the dry mixer through the feed pipe, the present invention closes the feed pipe and opens the exhaust mechanism to adsorb dust generated during the mixing process of the dry mixer, temporarily adsorbing the dust onto the combined filter cloth. Subsequently, when the negative pressure hood stops exhausting, the negative pressure disappears, and the dust temporarily adsorbed onto the combined filter cloth falls as air is introduced, thereby collecting the raised dust and recycling it into the dry mixer, reducing dust accumulation and making the ratio of raw materials more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of building material production, in particular to a dust collection and recovery mechanism for a plaster mortar production line. Background Art

[0002] Plaster mortar, also called plastering mortar, is a mortar used on the surface of buildings. Dry-mixed mortar is one of the manufacturing methods of plaster mortar. Various raw materials are directly mixed and stirred without adding liquid. A dust collector will be installed during the stirring process to absorb dust.

[0003] According to patent announcement number CN215196129U, publication (announcement) date: 2021-12-17, a dust collection and recovery device for dry mortar production is disclosed, including a device body, the inner surface of the device body is fixedly connected to a transfer pipe, the right side of the fixed plate is fixedly connected to an exhaust fan, the bottom of the transfer pipe is fixedly connected to a transmission pipe, the right side of the transmission pipe is fixedly connected to a connecting pipe, the bottom of the connecting pipe is movably connected to a collection box, and the inner surface of the wooden box is movably connected to an air bag. The dust collection and recovery device for dry mortar production is started by an exhaust fan, and the dust is processed through the transmission pipe. The blown gas causes the turntable to rotate, and most of the ash layer falls on the first filter net. The blades on the surface of the turntable knock most of the dust into the connecting pipe, causing most of the dust to fall inside the collection box. Part of the powder layer continues to move downward and eventually falls into the air bag. The above structure achieves the effect of recovering dust.

[0004] In the prior art including the above-mentioned patent, the raw materials of the plaster mortar include small-particle raw materials such as fine aggregate and lime. When mixing the plaster mortar with a large amount of small-particle raw materials, the small-particle raw materials are easily sucked away by the dust collector, and the small-particle raw materials after being sucked away will be discarded as waste, resulting in two parts, and will cause the proportion of the raw materials to change. Summary of the Invention

[0005] The purpose of the present invention is to provide a dust collection and recovery mechanism for a plaster mortar production line, aiming to solve the above problems.

[0006] In order to achieve the above object, the present invention provides the following technical solution: a dust collection and recovery mechanism for a plastering mortar production line, comprising a dry mixer and a feed pipe, and further comprising an intervening pipe arranged between the dry mixer and the feed pipe, wherein the intervening pipe is provided with:

[0007] Symmetrical combination filter cloth;

[0008] An air extraction mechanism, comprising a negative pressure cover provided on the combined filter cloth;

[0009] The negative pressure hood is intermittently evacuated to prevent dust from being adsorbed on the combined filter cloth and then falling along the intermittent pipe.

[0010] Preferably, the combined filter cloth is switched between the following two stations:

[0011] First station: the combined filter cloth absorbs dust and accumulates and bends;

[0012] Second working station: the combined filter cloth is bent to a predetermined position, and the negative pressure cover eliminates the negative pressure to drive the combined filter cloth to rebound.

[0013] Preferably, partition plates are provided on the combined filter cloth in a linear array, and a retention space for accumulating dust is formed between two of the partition plates.

[0014] Preferably, the negative pressure hood is provided with an air return pipe, which is driven to communicate with the outside world to drive the dust accumulated on the combined filter cloth to fall.

[0015] Preferably, the combined filter cloth includes an outer filter cloth facing the inner wall of the interpenetrating tube and an inner filter cloth covering the outer filter cloth, and the outer filter cloth is driven to bend to drive the partition plate to flip and compress the accumulated dust in the retention space.

[0016] Preferably, a first retention area and a second retention area are sequentially provided on the outer filter cloth, the second retention area is bent and arched along with the outer filter cloth, and the first retention area is in a vertical state along with the outer filter cloth to squeeze the retention space.

[0017] Preferably, a telescopic bracket for auxiliary support of the combined filter cloth is slidably connected to the inclined surface of the negative pressure hood, and a support rod slidably connected to the return air pipe is provided on the telescopic bracket, and the support rod moves as the combined filter cloth bends.

[0018] Preferably, the telescopic bracket includes an upper sliding sleeve and a lower sliding frame that are slidably connected to each other, and connecting rods are provided in a linear array on the upper sliding sleeve and the lower sliding frame. The connecting rods correspond one-to-one with the partition plates on the combined filter cloth to limit the flipping of the partition plates.

[0019] Preferably, a limiting frame is provided on the telescopic bracket, and the support rod slides along the bracket and vibrates along the limiting frame.

[0020] Preferably, the inner filter cloth is provided with an elastic stretching portion corresponding to the first retention area, and the first retention area and the second retention area are alternately arched as the combined filter cloth is deformed.

[0021] In the above technical solution, the present invention provides a dust collection and recovery mechanism for a plaster mortar production line, which has the following beneficial effects: when the proportioned powder is stirred into the dry mixer through the feed pipe, the feed pipe will be closed and the exhaust mechanism will be opened to adsorb the dust generated during the mixing process of the dry mixer, and temporarily adsorb the dust onto the combined filter cloth. Then, when the negative pressure hood stops exhausting, the negative pressure disappears, and with the intake of air, the dust temporarily adsorbed on the combined filter cloth falls, thereby collecting the raised dust and recycling it into the dry mixer, reducing dust accumulation and making the proportion of raw materials more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 An overall schematic diagram provided for an embodiment of the present invention;

[0024] Figure 2 A schematic side view of an embodiment of the present invention;

[0025] Figure 3 for Figure 2 A in the middle is an enlarged schematic diagram;

[0026] Figure 4 An overall explosion diagram provided for an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of the position of the combined filter cloth provided in an embodiment of the present invention;

[0028] Figure 6 A schematic cross-sectional view of an exhaust pipe and a negative pressure hood provided in an embodiment of the present invention;

[0029] Figure 7 An overall cross-sectional schematic diagram provided for an embodiment of the present invention;

[0030] Figure 8 for Figure 7 The enlarged schematic diagram of point B in the middle;

[0031] Figure 9 for Figure 7 The enlarged schematic diagram of point C in the middle;

[0032] Figure 10 for Figure 7 The enlarged schematic diagram of point D in the middle;

[0033] Figure 11 for Figure 7An enlarged schematic diagram of another workstation at D in the middle;

[0034] Figure 12 An exploded schematic diagram of a telescopic bracket provided in an embodiment of the present invention;

[0035] Figure 13 for Figure 12 The enlarged schematic diagram at E in the middle;

[0036] Figure 14 A schematic diagram of an explosion of a combined filter cloth provided in an embodiment of the present invention.

[0037] Description of reference numerals:

[0038] 1. Intermediate pipe; 11. Side groove; 12. Bell mouth; 13. Feed pipe; 14. Exhaust pipe; 2. Exhaust mechanism; 21. Negative pressure hood; 22. Return air pipe; 23. Telescopic bracket; 231. Upper sliding sleeve; 232. Lower sliding bracket; 233. Connecting rod; 234. Slide; 235. First spring; 24. Support rod; 241. Ventilation slider; 25. Limiting frame; 251. Elastic sheet; 3. Combined filter cloth; 31. Partition plate; 311. Elastic connecting strip; 32. Outer filter cloth; 321. First retention area; 322. Second retention area; 33. Inner filter cloth; 331. Bending portion; 332. Elastic stretching portion; 4. Overload mechanism; 41. Blocking plate; 411. Guide column; 412. Second spring; 42. End face ring; 43. Damping plate; 5. Dry mixing mixer. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0040] like Figure 1-14 As shown, a dust collection and recovery mechanism for a plaster mortar production line includes a dry mixer 5 and a feed pipe 13, and also includes an intervening pipe 1 set between the dry mixer 5 and the feed pipe 13, and the intervening pipe 1 is provided with:

[0041] Symmetrical combination filter cloth 3;

[0042] The air extraction mechanism 2 includes a negative pressure cover 21 which is covered on the combined filter cloth 3;

[0043] Among them, the negative pressure cover 21 is intermittently pumped to limit the dust from being adsorbed on the combined filter cloth 3 and then falling along the intermittent pipe 1;

[0044] An air return pipe 22 is provided on the negative pressure cover 21. The air return pipe 22 is driven to communicate with the outside world to drive the dust accumulated on the combined filter cloth 3 to fall down.

[0045] Specifically, the top of the feed pipe 13 is connected with the other material pipes to transport powder into the dry mixer 5. The powder enters the dry mixer 5 through the interpenetrating pipe 1. There are two negative pressure hoods 21, which are respectively covered on the two combined filter cloths 3. The two negative pressure hoods 21 are connected to the exhaust equipment (the exhaust equipment can be a fan) through the three-way exhaust pipe 14 to adsorb dust. When the exhaust causes negative pressure to be generated in the dry mixer 5 and the interpenetrating pipe 1 and the exhaust cannot be continued, the return air pipe 22 is driven to connect to the outside world, and the external gas is guided into the dry mixer 5 and the interpenetrating pipe 1 to assist in temporary adsorption to the combined filter cloth 3 while falling, preparing for the subsequent suction of the exhaust pipe 14. An air inlet is provided on the dry mixer 5, and the air intake of the air inlet is less than the exhaust speed of the negative pressure hood 21, so as to slow down the speed of negative pressure formation and guide the dust to move to the interpenetrating pipe 1.

[0046] In the above technical solution, when the proportioned powder is stirred into the dry mixer 5 through the feed pipe 13, the feed pipe 13 will be closed and the exhaust mechanism 2 will be turned on to adsorb the dust generated during the mixing process of the dry mixer 5, and the dust will be temporarily adsorbed onto the combined filter cloth 3. Then, when the negative pressure hood 21 stops exhausting, the negative pressure disappears, and as the air is taken in, the dust temporarily adsorbed onto the combined filter cloth 3 falls, thereby collecting the raised dust and recycling it into the dry mixer 5, reducing dust accumulation and making the proportion of raw materials more accurate.

[0047] Furthermore, an end face ring 42 is provided on the return air pipe 22, a sealing plate 41 is provided on the return air pipe 22, and a guide sliding column 411 is provided on the sealing plate 41 which is slidably connected to the end face ring 42. The sealing plate 41 is driven to slide to seal the return air pipe 22 or open the return air pipe 22 to cooperate with the dust collection and falling accumulation function of the combined filter cloth 3. Side grooves 11 are symmetrically provided on the interpenetrating pipe 1, and the combined filter cloth 3 is arranged on the side grooves 11. A bell mouth 12 extending into the dry mixer 5 is provided at the bottom of the interpenetrating pipe 1, and the bell mouth 12 guides the dust.

[0048] As an embodiment provided by the present invention, the combined filter cloth 3 is switched between the following two stations:

[0049] First station: When the vacuum hood 21 is sucked by the vacuum pipe 14, the combined filter cloth 3 will continue to absorb dust. As the sucked dust accumulates and the negative pressure gradually builds up, the combined filter cloth 3 will bend.

[0050] The second working station: the combined filter cloth 3 is bent to a predetermined position (the predetermined position is when the dust accumulates to a certain extent, causing the gas in the negative pressure cover 21 to be extracted, causing the combined filter cloth 3 to bend to the extreme position), and the negative pressure cover 21 eliminates the negative pressure to drive the combined filter cloth 3 to rebound, so that the dust temporarily adsorbed on the combined filter cloth 3 and accumulated falls into the dry mixer 5 for continued mixing.

[0051] Furthermore, a linear array of partitions 31 is provided on the combined filter cloth 3. A retention space for dust accumulation is formed between the two partitions 31. As air is exhausted, dust accumulates in the retention space. As the combined filter cloth 3 bends due to the accumulation of dust, some of the partitions 31 flip over to squeeze the dust, forming dust blocks. Then, when the combined filter cloth 3 switches to the second station, the combined filter cloth 3 rebounds, dropping the dust blocks into the dry mixer 5 for further mixing. The dust blocks can help separate from the retention space, reducing retained dust. Moreover, the agglomerated dust is not easily absorbed by the suction of the negative pressure hood 21, making it easier to separate from the retention space.

[0052] As an embodiment provided by the present invention, the combined filter cloth 3 includes an outer filter cloth 32 facing the inner wall of the interpenetrating tube 1 and an inner filter cloth 33 covering the outer filter cloth 32. The outer filter cloth 32 serves as a cloth that directly contacts the dust for collection and plays a major filtering effect, while the inner filter cloth 33 covering the outer filter cloth 32 is used to support the outer filter cloth 32 and guide the outer filter cloth 32 when it is bent by negative pressure, and provides rebound force when the negative pressure is eliminated. When bending, the guiding inner filter cloth 33 bends to drive the partition plate 31 to flip and compress the accumulated dust in the retention space to form a dust block.

[0053] Furthermore, both ends of the partition plate 31 are arranged on the side groove 11 of the interpenetrating pipe 1 through elastic connecting strips 311, so that the partition plate 31 can be turned over and the accumulated dust can be compressed at the same time.

[0054] As an embodiment provided by the present invention, a first retention area 321 and a second retention area 322 are sequentially provided on the outer filter cloth 32. When the combined filter cloth 3 is in the first position and is not bent, the second retention area 322 is in a vertical state, and the first retention area 321 is bent and arched along with the outer filter cloth 32. When the combined filter cloth 3 is in the first position and is bent along with the accumulation of dust, the second retention area 322 is bent and arched along with the outer filter cloth 32, and the first retention area 321 is in a vertical state along with the outer filter cloth 32, so that the first retention area 321 and the second retention area 322 both separate the accumulated dust. The first retention area 321 is flipped and expanded along with the partition plate 31 when bending. The first retention area 321 will bend and arch only after the combined filter cloth 3 rebounds, so as to separate the accumulated dust through the cooperation of rebound and arching. The second retention area 322 squeezes the accumulated dust through bending and arching in cooperation with the flipped and closed partition plate 31, thereby separating the accumulated dust through rebound.

[0055] Furthermore, an elastic stretching portion 332 corresponding to the first retention area 321 is provided on the inner filter cloth 33. The elastic stretching portion 332 pulls the first retention area 321 to arch when the combined filter cloth 3 returns to a vertical state. A bending portion 331 corresponding to the second retention area 322 is provided on the inner filter cloth 33. The bending portion 331 bends when the partition plate 31 is flipped over so that the partition plate 31 can flip and squeeze the dust. When the combined filter cloth 3 is bent, the first retention area 321 and the second retention area 322 are alternately arched as the combined filter cloth 3 is deformed, so as to clean up the accumulated dust and reduce the retention of dust.

[0056] As an embodiment provided by the present invention, a telescopic bracket 23 for auxiliary support of the combined filter cloth 3 is slidably connected to the inclined surface of the negative pressure cover 21, and a support rod 24 slidably connected to the return air pipe 22 is provided on the telescopic bracket 23. A ventilation slider 241 is provided on the support rod 24. The ventilation slider 241 can slide along the return air pipe 22 while allowing air to pass through. A second spring 412 is provided between the end ring 42 and the blocking plate 41. The second spring 412 pulls the blocking plate 41 against the The return air pipe 22 is sealed, and damping plates 43 are symmetrically arranged on the end ring 42. The damping plates 43 damp the guide slide column 411, and the support rod 24 moves as the combined filter cloth 3 bends. When the combined filter cloth 3 bends to a predetermined position, the ventilation slider 241 pushes the blocking plate 41, driving the return air pipe 22 to connect with the outside world. In order to maintain the connection time sufficient for the combined filter cloth 3 to rebound, the damping plate 43 damps the guide slide column 411 to realize the rebound action of the combined filter cloth 3.

[0057] As an embodiment provided by the present invention, the telescopic bracket 23 includes an upper sliding sleeve 231 and a lower bracket 232 that are slidably connected to each other. A first spring 235 is provided between the upper sliding sleeve 231 and the lower bracket 232 to overcome the suction force of the negative pressure cover 21. Connecting rods 233 are provided in a linear array on the upper sliding sleeve 231 and the lower bracket 232. The two groups of connecting rods 233 of the upper sliding sleeve 231 and the lower bracket 232 have different movement directions. The two groups of connecting rods 233 are respectively provided on the partition plate 31 on the combined filter cloth 3. As the negative pressure cover 21 continuously draws air to form a negative pressure to drive the combined filter cloth 3 to bend, it will push the upper sliding sleeve 231 and the lower bracket 232 to slide and shorten with each other, and drive the two groups of connecting rods 233 to approach each other, thereby driving the partition plate 31 to flip, and the moving upper sliding sleeve 231 and the lower bracket 232 can also push the support rod 24.

[0058] As an embodiment provided by the present invention, a sliding groove 234 is provided on the upper sliding sleeve 231 and the lower sliding frame 232, and the support rod 24 is slidably connected in the sliding groove 234. A limiting frame 25 is provided on the sliding groove 234, and an elastic sheet 251 is symmetrically provided on the limiting frame 25. When the support rod 24 slides along the sliding groove 234, the elastic sheet 251 on the limiting frame 25 will intercept the support rod 24 for restriction. When the support rod 24 breaks through the interception and strikes another elastic sheet 251 to generate vibration, the vibration is transmitted to the partition plate 31 by the connecting rod 233, thereby assisting the separation of accumulated dust through vibration.

[0059] First, the powder with a good proportion is transported to the dry mixer 5 through the feed pipe 13 and stirred. During stirring, the exhaust equipment is started to exhaust the negative pressure cover 21, so that the dust is temporarily adsorbed into the retention space on the combined filter cloth 3 for accumulation. As the dust continues to adhere to the outer filter cloth 32 in the retention space, the filter cloth is gradually blocked, driving the suction force to overcome the resistance of the first spring 235 and the inner filter cloth 33 and bend, driving the combined filter cloth 3 to gradually bend at the first station. When bending, the upper sliding sleeve 231 and the lower bracket 232 slide against each other, and drive the two sets of connecting rods 233 to approach each other, thereby driving the partition plate 31 to flip The outer filter cloth 32 is rotated to cooperate with the second retention area 322 to bend and arch along with the outer filter cloth 32, so as to compress the dust in the second retention area 322, and the arched state of the first retention area 321 is rotated to a vertical state along with the outer filter cloth 32. At this time, the support rod 24 slides along the slide groove 234 to generate vibration to loosen the dust accumulated in the first retention area 321 and compress the dust in the second retention area 322. As the combined filter cloth 3 is continuously bent, the support rod 24 pushes the sealing plate 41 to open, so that the combined filter cloth 3 rebounds and shakes off the dust in the first retention area 321 and the second retention area 322, thereby reducing dust accumulation and making the proportion of raw materials more accurate.

[0060] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A dust collection and recovery mechanism for a plaster mortar production line, comprising a dry mixer (5) and a feed pipe (13), characterized in that: The invention also includes an intervening pipe (1) provided between the dry mixer (5) and the feed pipe (13), wherein the intervening pipe (1) is provided with: Symmetrical combined filter cloth (3); An air extraction mechanism (2) comprising a negative pressure cover (21) disposed on the combined filter cloth (3); The negative pressure cover (21) intermittently pumps air to prevent dust from being adsorbed on the combined filter cloth (3) and then falling along the intermittent pipe (1); The combined filter cloth (3) is switched between the following two stations: First station: the combined filter cloth (3) absorbs dust and accumulates and bends; Second workstation: the combined filter cloth (3) is bent to a predetermined position, and the negative pressure cover (21) eliminates the negative pressure to drive the combined filter cloth (3) to rebound; The combined filter cloth (3) is provided with partition plates (31) in a linear array, and a retention space for accumulating dust is formed between two of the partition plates (31); The combined filter cloth (3) comprises an outer filter cloth (32) facing the inner wall of the interpenetrating tube (1) and an inner filter cloth (33) covering the outer filter cloth (32), wherein the outer filter cloth (32) is driven to bend so as to drive the partition plate (31) to flip and compress the accumulated dust in the retention space.

2. A dust collection and recovery mechanism for a plastering mortar production line according to claim 1, characterized in that: An air return pipe (22) is provided on the negative pressure cover (21), and the air return pipe (22) is driven to communicate with the outside world to drive the dust accumulated on the combined filter cloth (3) to fall down.

3. The dust collection and recovery mechanism for a plastering mortar production line according to claim 1, characterized in that: A first retention area (321) and a second retention area (322) are sequentially provided on the outer filter cloth (32), wherein the second retention area (322) is bent and arched along with the outer filter cloth (32), and the first retention area (321) is in a vertical state along with the outer filter cloth (32) to squeeze the retention space.

4. The dust collection and recovery mechanism for a plastering mortar production line according to claim 2, characterized in that: A telescopic bracket (23) for auxiliary support of the combined filter cloth (3) is slidably connected to the inclined surface of the negative pressure cover (21), and a support rod (24) slidably connected to the inside of the return air pipe (22) is provided on the telescopic bracket (23), and the support rod (24) moves as the combined filter cloth (3) bends.

5. The dust collection and recovery mechanism for a plastering mortar production line according to claim 4, characterized in that: The telescopic bracket (23) comprises an upper sliding sleeve (231) and a lower sliding frame (232) that are slidably connected to each other. Connecting rods (233) are provided on both the upper sliding sleeve and the lower sliding frame (232) in a linear array. The connecting rods (233) correspond one-to-one with the partition plates (31) on the combined filter cloth (3) to limit the flipping of the partition plates (31).

6. The dust collection and recovery mechanism for a plastering mortar production line according to claim 4, characterized in that: A limiting frame (25) is provided on the telescopic bracket (23), and the support rod (24) slides along the bracket (23) and vibrates along the limiting frame (25).

7. The dust collection and recovery mechanism for a plastering mortar production line according to claim 3, characterized in that: The inner filter cloth (33) is provided with an elastic stretching portion (332) corresponding to the first retention area (321), and the first retention area (321) and the second retention area (322) are alternately arched as the combined filter cloth (3) deforms.

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