A premixed mortar production dust removal and recovery device

Abstract

The utility model belongs to dust removal and recovery device technical field, concretely relates to a kind of premixed mortar production dust removal and recovery device, including box, the top of the box is connected with the purification room, the bottom of the box is connected with the hopper, the left side of the box is connected with the air inlet, the inner wall left side of the box is fixedly connected with the air inlet filter screen, the position of the air inlet filter screen corresponds with the position of the air inlet, the right side of the box is fixedly installed with the air pump, the input end of the air pump is connected into purification room, the inside upper portion of the box is fixedly connected with fixed plate. By adding mechanical linkage structure, pulse jet dust cleaning and mechanical shaking dust cleaning are combined, dust cleaning efficiency is effectively improved, wherein, motor drives cam rotation, forces linkage plate to drive all filter bags to carry out high-frequency up-down reciprocating motion, forms mechanical shaking, shaking and pulse airflow reverse impact synergistic effect, can more thoroughly shake off dust agglomerate adhered in filter bag deep layer.

Description

Technical Field

[0001] This solution belongs to the field of dust collection and recovery devices, specifically involving a dust collection and recovery device for premixed mortar production. Background Technology

[0002] In the production of premixed mortar (including dry-mixed mortar and special mortar), a large amount of dust is generated at each stage, including feeding, conveying, lifting, mixing, and packaging, from raw materials such as cement, fly ash, and quartz sand (powdered and granular materials). This dust not only wastes valuable raw materials and increases production costs, but also seriously pollutes the working environment, endangers the respiratory health of operators, and poses a potential safety risk of dust explosion. Therefore, efficient and reliable dust collection and recovery devices have become an indispensable key environmental protection equipment in premixed mortar production lines. Currently, baghouse dust collectors are widely used in the industry as the main dust removal method. Their basic principle is to use fiber filter bags to filter dust-laden gas, trapping dust on the outer surface of the filter bags, while the purified gas is discharged into the atmosphere. To remove the dust adhering to the filter bags and maintain their filtration performance, traditional cleaning methods mainly include pulse jet cleaning and mechanical vibration cleaning.

[0003] A search revealed a utility model patent with authorization announcement number CN211753267U, which discloses a bag filter for dry-mixed mortar production. The bag filter includes a main body, a dust discharge pipe located below the main body, and a water circulation device located at the end of the dust discharge pipe furthest from the bag filter. The water circulation device includes a circulating water pump, a circulating pipe, and a filter box. The dust discharge pipe is connected to the outer wall of the circulating pipe, and the two ends of the circulating pipe are respectively connected to one side of the filter box and the outlet of the circulating water pump.

[0004] Based on the above patent searches and the findings of existing baghouse dust collectors, in practical applications, for fine dust such as premixed mortar that has a certain degree of adhesion and is prone to caking, a single pulse jet cleaning method is sometimes insufficient to completely shake off the dust adhering deep within the filter bag fibers, especially in environments with slightly higher humidity. Over time, this can easily lead to filter bag caking and blockage, resulting in a continuous increase in equipment operating resistance, a decrease in processing air volume, and unsatisfactory dust removal effect. In addition, the air inlet of the dust collection system is the first barrier for dust-laden gas to enter. Large particles or fibrous debris are easily initially intercepted here. These intercepted debris tend to accumulate at the air inlet filter screen, gradually blocking the air intake channel and affecting the overall suction effect of the system. Utility Model Content

[0005] The purpose of this solution is to provide a dust removal and recycling device for premixed mortar production to solve the problems of low dust removal efficiency and easy clogging.

[0006] To achieve the above objectives, this solution provides a dust removal and recovery device for premixed mortar production, including a housing. A purification chamber is connected to the top of the housing, and an ash hopper is connected to the bottom of the housing. An air inlet is connected to the left side of the housing. An air inlet filter is fixedly connected to the left inner wall of the housing, with the filter positioned corresponding to the air inlet. An air pump is fixedly installed on the right side of the housing, with its input end connected to the purification chamber. A fixing plate is fixedly connected to the upper inner side of the housing, and multiple filter bags are fixedly connected inside the fixing plate. A linkage plate is fixedly connected to the bottom of the multiple filter bags. Arc plates are fixedly connected to the left and right sides of the bottom of the linkage plate. A motor is fixedly installed on the right side of the housing, below the air pump. The output shaft of the motor passes through the housing and is connected to the housing via a sealed bearing. A rotating shaft is fixedly connected to the end of the output shaft. Cams are fixedly connected to the front and rear sections of the rotating shaft, with the sides of the cams contacting the arc plates. A pulse dust removal mechanism is installed on the purification chamber.

[0007] The principle of this solution is as follows: First, the air inlet pipe of the air tank is connected to the compressed air source of the factory, and the electrical equipment of the device is connected to the PLC control cabinet. Then, the air pump is started, which creates negative pressure in the chamber. The dust-laden gas enters from the air inlet and passes through the air filter screen to initially intercept large dust particles and fall into the dust hopper. Subsequently, the gas passes upward through the filter bag, and the dust is trapped on the outer surface of the filter bag. The purified gas enters the purification chamber and is finally discharged by the air pump. The PLC controls a pulse solenoid valve to open instantaneously, allowing compressed air to be injected vertically downwards into the filter bags through the blowpipe. This causes the filter bags to rapidly expand and shake. Simultaneously, the motor drives a cam to rotate, continuously pushing the linkage plate up and down, causing all the filter bags to shake synchronously at the bottom. This thoroughly shakes off the dust cake adhering to the outer surface of the filter bags, causing it to fall into the ash hopper. During the dust removal process, the motor also drives a rotating rod to rotate. Each rotation of the rod strikes a protrusion, causing the push rod to overcome the spring force and slide within the hollow sleeve, disengaging from the inlet filter screen. After the rod has rotated, the spring pushes the push rod back to its original position, pushing it against the inlet filter screen and producing a knock. This continuous action effectively prevents dust from clogging the inlet filter screen, ensuring unobstructed airflow.

[0008] The technical advantages of this solution are as follows: By adding a mechanical linkage structure, pulse jet cleaning is combined with mechanical shaking cleaning, which effectively improves the cleaning efficiency. Specifically, the electric motor drives the cam to rotate, which forces the linkage plate to drive all the filter bags to move up and down at a high frequency, forming mechanical shaking. The shaking and the reverse impact of the pulse airflow work together to more thoroughly shake off the dust clumps attached to the deep layers of the filter bags, effectively avoiding the problem of reduced filtration airflow caused by filter bag blockage. This ensures that the dust removal system can maintain a stable and efficient operating state for a long time and extends the service life of the filter bags.

[0009] By reusing the dust removal power source as an anti-clogging mechanism, the functions are integrated and automated. The same motor periodically strikes the protrusion through the rotating rod, driving the top rod to perform high-frequency, small-amplitude knocking on the air intake filter. This continuous active cleaning can effectively remove the flocculent or blocky debris trapped during coarse filtration, prevent the air intake from being blocked, and ensure the stability of the system's suction. Moreover, this design requires no additional power, has a high degree of automation, significantly reduces the frequency of manual cleaning and maintenance, and improves production efficiency.

[0010] Furthermore, the air intake filter is open on the side near the air inlet and at the bottom. This allows the dust-laden air to be discharged downwards after being coarsely filtered by the air intake filter.

[0011] Furthermore, the pulse dust removal mechanism includes an air tank located outside the cleanroom. Multiple connecting pipes are connected to the air tank, penetrating the cleanroom and extending to its inner side. A blowpipe is connected to the end of each connecting pipe, and multiple air outlets are connected to the bottom of the blowpipe. The positions of the air outlets correspond to the positions of the filter bags. A pulse solenoid valve is installed on the body of each connecting pipe. As a basic structure, the pulse dust removal mechanism can inflate and remove dust from each filter bag.

[0012] Furthermore, a guide sleeve is fixedly connected to the upper edge of the linkage plate, and a guide frame is slidably connected to the inner side of the guide sleeve. The guide frame is L-shaped, and the horizontal end of the guide frame is fixedly connected to the inner wall of the housing. The linkage plate and each filter bag can be raised and lowered guided by the guide sleeve and the guide frame.

[0013] Furthermore, a rotating rod is fixedly connected to the middle section of the shaft, and a hollow sleeve is fixedly connected to the right side of the inner wall of the housing. The hollow sleeve is horizontally positioned, and a push rod is slidably connected inside the hollow sleeve. The end of the push rod abuts against the air intake filter. A fixing ring is fixedly connected to the body of the push rod, and a protrusion is fixedly connected to the left side of the fixing ring. The position of the protrusion corresponds to the position of the rotating rod. As the rotating rod rotates with the shaft, it periodically collides with the protrusion, causing the push rod to move laterally under force and disengage from the air intake filter. After the rotating rod and the protrusion are misaligned, the push rod returns to its original position and vibrates the air intake filter to prevent clogging.

[0014] Furthermore, a spring is fixedly installed inside the hollow sleeve. One end of the spring is fixedly connected to the push rod, and the other end of the spring is fixedly connected to the inner surface of the hollow sleeve. The reaction force of the spring can act back on the push rod, providing auxiliary resetting.

[0015] Furthermore, a second fixing ring is fixedly connected to the outer side of the hollow sleeve, and a corrugated sleeve is fixedly connected to the second fixing ring and the first fixing ring. The corrugated sleeve has its own elasticity, which does not affect the relative sliding between the push rod and the hollow sleeve, while also providing dust protection at the relative sliding points between the two. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is an embodiment of the present utility model. Figure 1 A front sectional view; Figure 3 This is an embodiment of the present utility model. Figure 2 Enlarged view of point A; Figure 4 This is an embodiment of the present utility model. Figure 1 Schematic diagram of local structure Figure 1 ; Figure 5 This is an embodiment of the present utility model. Figure 1 Schematic diagram of local structure Figure 2 .

[0017] The following detailed explanation illustrates the specific implementation methods: The reference numerals in the accompanying drawings of the instruction manual include: 1. Housing; 2. Purification chamber; 3. Dust hopper; 4. Air inlet; 5. Air pump; 6. Pulse dust removal mechanism; 61. Air manifold; 62. Connecting pipe; 63. Pulse jet pipe; 64. Air outlet; 65. Pulse solenoid valve; 7. Fixing plate; 8. Filter bag; 9. Linkage plate; 10. Guide sleeve; 11. Guide frame; 12. Arc plate; 13. Motor; 14. Rotating shaft; 15. Cam; 16. Rotating rod; 17. Hollow sleeve; 18. Top rod; 19. Spring; 20. Fixing ring one; 21. Fixing ring two; 22. Protrusion; 23. Corrugated sleeve; 24. Air inlet filter. Detailed Implementation

[0018] The basic implementation examples are as follows: Figure 1 , Figure 2 , Figure 4 , Figure 5As shown: A dust removal and recycling device for premixed mortar production includes a box body 1. A purification chamber 2 is connected to the top of the box body 1, and an ash hopper 3 is connected to the bottom of the box body 1. An air inlet 4 is connected to the left side of the box body 1. An air inlet filter 24 is fixedly connected to the left side of the inner wall of the box body 1. The position of the air inlet filter 24 corresponds to the position of the air inlet 4. The side of the air inlet filter 24 near the air inlet 4 and the bottom are open. In this way, the dust-laden air can be discharged downwards after being coarsely filtered by the air intake filter 24. An air pump 5 is fixedly installed on the right side of the housing 1. The input end of the air pump 5 is connected to the purification chamber 2. A fixed plate 7 is fixedly connected to the upper inner side of the housing 1. Multiple filter bags 8 are fixedly connected inside the fixed plate 7. The bottom of the multiple filter bags 8 is fixedly connected to a linkage plate 9. A guide sleeve 10 is fixedly connected to the upper edge of the linkage plate 9. A guide frame 11 is slidably connected to the inner side of the guide sleeve 10. The guide frame 11 is L-shaped. The horizontal end of the guide frame 11 is fixedly connected to the inner wall of the housing 1. The linkage plate 9 and each filter bag 8 can be raised and lowered guided by the guide sleeve 10 and the guide frame 11. Arc plates 12 are fixedly connected to the bottom left and right sides of the linkage plate 9. A motor 13 is fixedly installed on the right side of the housing 1, below the suction pump 5. The output shaft of the motor 13 passes through the housing 1 and is connected to the housing 1 via a sealed bearing. A rotating shaft 14 is fixedly connected to the end of the output shaft. Cams 15 are fixedly connected to the front and rear sections of the rotating shaft 14, and the sides of the cams 15 contact the arc plates 12. The motor 13 drives the rotating shaft 14 to rotate, and the cams 15 on the rotating shaft 14, through their cooperation with the arc plates 12, can drive the linkage plate 9 and the filter bags 8 to extend and retract vertically. This allows the filter bags 8 to better shake off dust during the air-filling and dust-cleaning process.

[0019] like Figure 1 , Figure 2 , Figure 4 As shown, a pulse dust removal mechanism 6 is installed on the clean chamber 2. The pulse dust removal mechanism 6 includes an air tank 61, which is located on the outside of the clean chamber 2. Multiple connecting pipes 62 are connected to the air tank 61, passing through the clean chamber 2 and extending to the inside of the clean chamber 2. A blowpipe 63 is connected to the end of the connecting pipe 62, and multiple air outlets 64 are connected to the bottom of the blowpipe 63. The positions of the air outlets 64 correspond to the positions of the filter bags 8. A pulse solenoid valve 65 is installed on the body of the connecting pipe 62. The pulse dust removal mechanism 6 serves as the basic structure and can inflate and remove dust from each filter bag 8.

[0020] like Figure 2 , Figure 3 , Figure 5As shown, a rotating rod 16 is fixedly connected to the middle section of the shaft of the rotating shaft 14. A hollow sleeve 17 is fixedly connected to the right side of the inner wall of the housing 1. The hollow sleeve 17 is horizontally positioned, and a push rod 18 is slidably connected inside the hollow sleeve 17. The end of the push rod 18 abuts against the air intake filter 24. A fixing ring 20 is fixedly connected to the rod of the push rod 18. A protrusion 22 is fixedly connected to the left side of the fixing ring 20, and the position of the protrusion 22 corresponds to the position of the rotating rod 16. A spring 19 is fixedly installed inside the hollow sleeve 17. One end of the spring 19 is fixedly connected to the push rod 18, and the other end of the spring 19 is fixedly connected to the inner surface of the hollow sleeve 17. The reaction force of the spring 19 can act back on the push rod 18, which has an auxiliary resetting function. A fixing ring 21 is fixedly connected to the outer side of the hollow sleeve 17. A corrugated sleeve 23 is fixedly connected between the fixing ring 21 and the fixing ring 20. The corrugated sleeve 23 has inherent elasticity, which does not affect the relative sliding between the push rod 18 and the hollow sleeve 17, while also providing dust protection at the relative sliding point between the two. As the rotating rod 16 rotates with the rotating shaft 14, it periodically collides with the protrusion 22, causing the push rod 18 to be forced to move laterally and disengage from the air intake filter 24. After the rotating rod 16 and the protrusion 22 are misaligned, the push rod 18 returns to its original position and vibrates the air intake filter 24 to prevent clogging.

[0021] The specific implementation process of this utility model is as follows: First, the air inlet pipe of the air tank 61 is connected to the compressed air source of the factory, and the electrical equipment of the device is connected to the PLC control cabinet. Then, the air pump 5 is started, and the air pump 5 creates a negative pressure in the box 1. The dust-laden gas enters from the air inlet 4 and passes through the air filter 24 to initially intercept large dust particles and fall into the dust hopper 3. Subsequently, the gas penetrates upward through the filter bag 8, and the dust is trapped on the outer surface of the filter bag 8. The purified gas enters the purification chamber 2 and is finally discharged by the air pump 5. The PLC controls a pulse solenoid valve 65 to open instantaneously, and compressed air is injected vertically downwards from the outlet 64 through the blowpipe 63 into the filter bag 8, causing the filter bag 8 to rapidly expand and shake. At the same time, the motor 13 drives the cam 15 to rotate, continuously pushing the linkage plate 9 to move up and down reciprocally, causing the bottom of all the filter bags 8 to shake synchronously, so that the dust cake attached to the outer surface of the filter bag 8 is completely shaken off and falls into the ash hopper 3. Simultaneously, during the dust removal process, the motor 13 drives the rotating rod 16 to rotate. Each rotation of the rotating rod 16 hits the protrusion 22, causing the top rod 18 to slide inside the hollow sleeve 17 against the elastic force of the spring 19 and disengage from the inlet filter screen 24. After the rotating rod 16 has rotated, the spring 19 pushes the top rod 18 back to its original position, pushing the top rod 18 against the inlet filter screen 24 and producing a knock. This continuous action effectively prevents dust from clogging the inlet filter screen 24 and ensures smooth air intake.

[0022] This solution combines pulse jet cleaning with mechanical shaking cleaning by adding a mechanical linkage structure, effectively improving cleaning efficiency. Specifically, the motor 13 drives the cam 15 to rotate, forcing the linkage plate 9 to move all the filter bags 8 in a high-frequency reciprocating motion, creating mechanical shaking. This shaking, combined with the counter-impact of the pulse airflow, more thoroughly shakes off dust clumps adhering deep to the filter bags 8, effectively preventing the reduction in filtration airflow caused by filter bag clogging. This ensures the dust removal system can maintain stable and efficient operation for a long period, extending its lifespan. This extends the service life of the filter bag 8. By reusing the cleaning power source as an anti-clogging mechanism, the functions are integrated and automated. The same motor 13 periodically strikes the protrusion 22 through the rotating rod 16, driving the top rod 18 to perform high-frequency, small-amplitude knocking on the air intake filter 24. This continuous active cleaning can effectively remove the flocculent or blocky debris trapped during coarse filtration, prevent the air inlet 4 from being blocked, and ensure the stability of the system suction. Moreover, this design requires no additional power, has a high degree of automation, significantly reduces the frequency of manual cleaning and maintenance, and improves production efficiency.

[0023] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A dust removal and recycling device for premixed mortar production, comprising a housing, characterized in that: The top of the housing is connected to a purification chamber, the bottom of the housing is connected to a dust hopper, the left side of the housing is connected to an air inlet, and an air inlet filter is fixedly connected to the left side of the inner wall of the housing, the position of the air inlet filter corresponding to the position of the air inlet. An air pump is fixedly installed on the right side of the housing, the input end of the air pump is connected to the purification chamber, a fixing plate is fixedly connected to the upper inner side of the housing, multiple filter bags are fixedly connected inside the fixing plate, the bottom of the multiple filter bags are fixedly connected to a linkage plate, and arc plates are fixedly connected to the left and right sides of the bottom of the linkage plate. A motor is fixedly installed on the right side of the housing and below the air pump, the output shaft of the motor passes through the housing and is connected to the housing through a sealed bearing, the end of the output shaft is fixedly connected to a rotating shaft, the front and rear sections of the rotating shaft are fixedly connected to cams, the side of the cams contacts the arc plates, and a pulse dust removal mechanism is provided on the purification chamber.

2. The dust removal and recovery device for premixed mortar production according to claim 1, characterized in that: The air intake filter is open on the side near the air inlet and at the bottom.

3. The dust removal and recovery device for premixed mortar production according to claim 1, characterized in that: The pulse dust removal mechanism includes an air tank located outside the cleanroom. Multiple connecting pipes are connected to the air tank, passing through the cleanroom and extending to the inside of the cleanroom. A blowpipe is connected to the end of the connecting pipe, and multiple air outlets are connected to the bottom of the blowpipe. The positions of the air outlets correspond to the positions of the filter bags. A pulse solenoid valve is installed on the body of the connecting pipe.

4. The dust removal and recovery device for premixed mortar production according to claim 1, characterized in that: The upper edge of the linkage plate is fixedly connected to a guide sleeve, and the inner side of the guide sleeve is slidably connected to a guide frame. The guide frame is L-shaped, and the horizontal end of the guide frame is fixedly connected to the inner wall of the box.

5. The dust removal and recovery device for premixed mortar production according to claim 1, characterized in that: A rotating rod is fixedly connected to the middle section of the shaft. A hollow sleeve is fixedly connected to the right side of the inner wall of the housing. The hollow sleeve is horizontally set. A top rod is slidably connected inside the hollow sleeve. The end of the top rod abuts against the air intake filter. A fixing ring is fixedly connected to the rod body. A protrusion is fixedly connected to the left side of the fixing ring. The position of the protrusion corresponds to the position of the rotating rod.

6. The dust removal and recovery device for premixed mortar production according to claim 5, characterized in that: A spring is fixedly installed inside the hollow sleeve. One end of the spring is fixedly connected to the top rod, and the other end of the spring is fixedly connected to the inner surface of the hollow sleeve.

7. A dust removal and recovery device for premixed mortar production according to claim 5, characterized in that: A second fixing ring is fixedly connected to the outer side of the hollow sleeve, and a corrugated sleeve is fixedly connected to the second fixing ring and the first fixing ring.

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