A cement feeding dust prevention device

Abstract

The present invention discloses a cement feeding dust prevention device, including a bracket and multiple mechanisms: the material transfer mechanism includes a material transfer trough, a support shaft and a door-shaped frame, the driving mechanism includes a driving motor, a disc, a fixing plate and an elastic rope, the material pressing mechanism includes a pressing plate, a flexible cloth and an L-shaped rod, the bagging mechanism includes a loop-shaped frame and a fixing pin, and the dust mist blowing mechanism includes a blowing nozzle, a vent pipe and an air bag. The present invention constructs a seesaw-type material transfer trough structure for the first time to realize vibration-type material feeding; cooperates with the material pressing mechanism, utilizes the periodic swing of the material transfer trough, and performs an alternating action of tightening and relaxing the cement powder through the pressing plate, so that it falls into the bag body in strips and flakes, greatly reducing the amount of dust falling from the material; by arranging a dust mist blowing mechanism at the bag opening, and utilizing the rotation of the supporting shaft connected to the material transfer trough, the alternating blowing and suction process of the air bag is automatically controlled, the amount of dust near the bag opening is reduced to the greatest extent, and a dust-free material feeding and bagging process is basically achieved, which is of great significance to cement production workshops.

Description

Technical Field

[0001] The present invention relates to the technical field of building powder feeding, and particularly to a dust-proof device for cement feeding. Background Art

[0002] Cement: A powdery hydraulic inorganic binder. After being mixed with water and stirred, it becomes a slurry, which can harden in the air or in water and can firmly bond materials such as sand and stone together. The mixture of early lime and pozzolan was very similar to modern lime pozzolan cement. The concrete made by cementing crushed stones with it not only has high strength after hardening, but also can resist the erosion of fresh water or salt water. For a long time, as an important binder, it has been widely used in civil engineering, water conservancy, national defense and other projects. The production process of silicate cement is representative in cement production. It uses limestone and clay as the main raw materials, which are crushed, proportioned, and ground into raw materials, and then fed into a cement kiln for calcination into clinker, and then the clinker is ground with an appropriate amount of gypsum (sometimes mixed materials or additives are also added). Depending on the preparation method of the raw materials, cement production can be divided into two types: dry process (including semi-dry process) and wet process (including semi-wet process).

[0003] Existing cement feeding mechanisms generally use a screw elevator to transport cement from the raw material tank to the designated position, then bag and seal the cement, and finally use the bagged cement for transportation and transfer. The purpose of bagging and feeding is to prevent cement from getting damp or polluting the workshop dust prevention. However, in the existing cement bagging process, the screw feeder is used to directly bag and feed from high to low. Since the cement powder contains concrete particles of various particle sizes, when pouring vertically, it rushes into the bag, splashing the cement dust in the cement bag and causing a large amount of cement dust to disperse, which is not environmentally friendly and wastes costs, and dust prevention treatment is urgently needed. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies in the prior art and propose a dust-proof device for cement feeding.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A dust-proof device for cement feeding, including a bracket, the bracket is composed of two legs and a strip board supported by them, the strip board is provided with a rectangular hole, and the following mechanisms are arranged on the bracket:

[0007] The material transfer mechanism includes a material transfer trough. Along the length direction at the top of the material transfer trough, a feed hopper, a sealing plate and an open port are sequentially arranged. The top end of the feed hopper is a funnel-shaped opening for receiving materials. The bottom end of the feed hopper is communicated with the internal cavity of the material transfer trough. And one end of the material transfer trough close to the feed hopper is a closed end, and the end of the material transfer trough far from the feed hopper is an outlet end. The material transfer trough is arranged in a slope shape with the closed end higher than the outlet end. At the middle parts of the two outer side walls of the material transfer trough, support shafts are fixedly connected. One end of each of the two support shafts is erected on a portal frame, and bearing holes for rotatably matching with the support shafts are arranged on both side walls of the portal frame. There is a gap between the bottom surface of the material transfer trough and the strip board. Through the portal frame and the support shafts, the material transfer trough forms a seesaw structure, that is, when the closed end is raised or lowered, the height of the outlet end is correspondingly lowered or raised;

[0008] The driving mechanism includes a driving motor arranged on the upper surface of the strip board. The output shaft of the driving motor is connected to an eccentric position on the surface of a disc. The top of the disc hub edge contacts a fixing plate. The output shaft of the driving motor and the fixing plate are connected by an elastic rope, and the top of the elastic rope is fixedly connected to the fixing plate; Through the eccentric rotation of the disc, the height of the fixing plate is periodically raised and lowered, so that the height of the closed end of the material transfer trough is alternately raised and lowered. The driving mechanism is used to drive the material transfer trough to swing at both ends around the support shaft, so as to feed the material transfer trough in a vibrating manner and avoid material aggregation; Compared with the existing direct pouring feeding method, the feeding speed of the present invention can be controlled by the rotation speed of the driving motor;

[0009] The material pressing mechanism includes a pressing plate arranged in the open port. One side of the pressing plate is fixedly connected to the sealing plate through a flexible cloth. The two side edges of the pressing plate and the flexible cloth are attached to the inner side wall of the material transfer trough, so as to form a sealing structure. There is a gap between the bottom surface of the pressing plate and the inner wall of the material transfer trough to form an outlet; The top surface of the pressing plate is movably connected to an L-shaped rod through a hinge. The end of the L-shaped rod far from the pressing plate is fixedly connected to the top edge of the portal frame. When the outlet end of the material transfer trough is raised or lowered, the inner diameter of the outlet formed by the top surface of the pressing plate and the inner wall of the material transfer trough changes alternately, so as to perform an alternating operation of pressing and loosening on the cement powder. After the surface of the cement powder becomes compact, it hardly generates dust anymore;

[0010] The bagging mechanism includes a return-shaped frame arranged below the rectangular hole. The return-shaped frame is arranged directly below the outlet end of the material transfer trough, so that the cement powder falls within the range of the return-shaped frame. Just surround the bag mouth of the packaging bag outside the return-shaped frame. The top surface of the return-shaped frame is fixedly connected to the bottom surface of the strip board. Fixed pins are arranged on the outer side wall of the return-shaped frame, and the packaging bag is connected through a hook;

[0011] The dust and fog blowing mechanism includes a blowing nozzle arranged on the inner wall of the return-shaped frame. The blowing direction of the blowing nozzle is inclined downward from the outside to the inside. One end of the blowing nozzle passes through the return-shaped frame and is connected to a ventilation pipe. The end of the ventilation pipe far from the blowing nozzle is communicated with an airbag. The airbag supplies air to the blowing nozzle to blow the dust at the edge of the bag mouth of the packaging bag downward and inward, further playing a dust prevention role.

[0012] Preferably, the slat is further provided with a strip-shaped hole for the disc to pass through, so that discs of different sizes can be used to adjust the swinging amplitude at both ends of the material transfer chute.

[0013] Preferably, the airbag can be supplied with air by an air pump, or can be automatically supplied with air by using the structure of the present application itself, that is, the following structure:

[0014] Lower support plates are arranged on both sides of the slat. The airbag is placed on the top surface of the lower support plate. An upper support plate is fixedly connected to the top of the airbag. The lower support plate and the upper support plate are supported by springs to ensure that the volume of the airbag can be restored. A cam is in contact with the top surface of the upper support plate. One of the support shafts passes through the portal frame and is fixedly connected to the cam. By rotating the support shaft to drive the rotation of the cam, the height of the upper support plate is increased or decreased, so that the volume of the airbag changes alternately, and then blowing or suction is generated through the nozzle. Blowing is beneficial to blowing the dust inwards and downwards, and suction gradually absorbs the dust in the ventilation pipe or the airbag, further playing a role in dust reduction.

[0015] Preferably, a clamping groove is arranged on the bottom surface of the U-shaped frame. A U-shaped wooden strip can be sleeved outside the packaging bag, the bag mouth is rolled up and then knocked into the clamping groove to play a role in installing the packaging bag, which is more cooperative with the hook connection of the fixing pin, that is, the invention can adopt two installation structures for the packaging bag.

[0016] Preferably, both the flexible cloth and the airbag are made of elastic rubber materials with a deformation amount not exceeding 100%, and the thickness of the flexible cloth is not less than 5 mm. The sufficient thickness can ensure the tight fit with the material transfer chute, ensure that there is basically no dust dispersion during the whole feeding process, and the dust amount pm2.5 in the feeding workshop is lower than 10 mg / L, which is relatively rare in the cement production workshop.

[0017] Preferably, a triangular plate is further arranged at the right angle of the L-shaped rod to prevent accidental dust fluctuations caused by the shaking of the pressing plate.

[0018] Preferably, the elastic cord is made of a highly elastic rubber material with a deformation amount not less than 200%. The fixing plates are fixedly connected to the elastic cord through metal glue respectively. An annular groove for the elastic cord to pass through is arranged on the output shaft of the driving motor, which is used to ensure that the fixing plate is always in contact with the disc regardless of lifting, playing a role in restoration.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The present invention constructs a seesaw-type material transfer chute structure, which drives one end to periodically lift through an eccentric wheel to achieve vibratory feeding; at the same time, it cooperates with a material pressing mechanism, and uses the periodic swing of the material transfer chute itself to perform alternating actions of pressing and relaxing the surface of the cement powder through a pressing plate, making the surface of the cement powder relatively compact, and falling into the bag in strip and sheet shapes, greatly reducing the amount of falling dust.

[0021] 2. The present invention sets a dust and mist blowing mechanism at the bag mouth of the packaging bag, and uses the rotation of the support shaft connected to the material transfer chute to automatically control the alternating process of air blowing and air suction of the airbag, minimizing the amount of dust near the bag mouth, and basically achieving a dust-free feeding and bagging process, which is of great significance to the cement production workshop.

[0022] 3. While dust-proofing, the present invention improves the material transportation speed through the vibration of the material transfer chute structure, so that the feeding and bagging speed during the dust-proofing process remains at a relatively high level, and the material transportation speed can be controlled by changing the inclination angle of the material transfer chute and the swing frequency (i.e., controlled by a driving motor), maximizing the avoidance of material aggregation. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of a dust-proof device for cement feeding proposed by the present invention;

[0024] Figure 2 is a schematic structural diagram of a dust-proof device for cement feeding proposed by the present invention;

[0025] Figure 3 is Figure 2 an enlarged view of part A of

[0026] Figure 4 is a schematic diagram of the seesaw lifting principle of the material transfer chute in a dust-proof device for cement feeding proposed by the present invention Figure 1 (low inclination state);

[0027] Figure 5 is a schematic diagram of the seesaw lifting principle of the material transfer chute in a dust-proof device for cement feeding proposed by the present invention Figure 2 (high inclination state).

[0028] In the figure: The support 1, the support feet 101, the strip board 102 are composed, the rectangular hole 103, the strip hole 104, the lower support board 105, the material transfer mechanism 2, the material transfer groove 201, the feed hopper 202, the sealing plate 203, the open port 204, the support shaft 205, the portal frame 206, the driving mechanism 3, the driving motor 301, the disc 302, the fixed plate 303, the elastic cord 304, the material pressing mechanism 4, the pressing plate 401, the flexible cloth 402, the hinge 403, the L-shaped rod 404, the triangular plate 405, the bagging mechanism 5, the looped frame 501, the fixed pin 502, the clamping groove 503, the dust and fog blowing mechanism 6, the blowing nozzle 601, the ventilation pipe 602, the airbag 603, the upper support board 604, the cam 605, the spring 606. Detailed implementation mode

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0030] Embodiment 1:

[0031] Refer to Figure 1-2 , a dust-proof device for cement feeding, including a support 1, the support is composed of two support feet 101 and the strip board 102 supported by them, the strip board 102 is provided with a rectangular hole 103, and the following mechanisms are arranged on the support:

[0032] The material transfer mechanism 2, including a material transfer groove 201, the top of the material transfer groove 201 is successively provided with a feed hopper 202, a sealing plate 203 and an open port 204 along the length direction. The top end of the feed hopper 202 is a funnel-shaped opening for receiving materials, mainly the cement powder transported by a screw feeder. The bottom end of the feed hopper 202 is connected to the internal cavity of the material transfer groove 201, and one end of the material transfer groove 201 close to the feed hopper 202 is a closed end, and the end of the material transfer groove 201 far from the feed hopper 202 is an outlet end. The material transfer groove 201 is arranged in a slope with the closed end higher than the outlet end. Both middle parts of the outer side walls of the material transfer groove 201 are fixedly connected with support shafts 205. One ends of the two support shafts 205 are erected on the portal frame 206, and bearing holes for rotational cooperation with the support shafts 205 are provided on both side walls of the portal frame 206. There is a gap between the bottom surface of the material transfer groove 201 and the strip board 102. Through the portal frame 206 and the support shafts 205, the material transfer groove 201 forms a seesaw structure, that is, when the closed end is raised or lowered, the height of the outlet end is correspondingly lowered or raised;

[0033] The driving mechanism 3 includes a driving motor 301 disposed on the upper surface of the strip board 102. The output shaft of the driving motor 301 is connected to an eccentric position on the surface of a disc 302. The top of the hub edge of the disc 302 contacts a fixing plate 303. The output shaft of the driving motor 301 is connected to the fixing plate 303 by an elastic cord 304, and the top of the elastic cord 304 is fixedly connected to the fixing plate 303. Through the eccentric rotation of the disc 302, the height of the fixing plate 303 is periodically raised and lowered, so that the height of the closed end of the material transfer chute 201 is alternately raised and lowered. The driving mechanism 3 is used to drive the material transfer chute 201 to swing at both ends around the support shaft 205, so as to feed the material transfer chute 201 in a vibrating manner and avoid material aggregation. Compared with the existing direct pouring feeding method, the feeding speed of the present invention can be controlled by the rotation speed of the driving motor 301;

[0034] The material pressing mechanism 4 includes a pressing plate 401 disposed in the open end 204. One side of the pressing plate 401 is fixedly connected to the sealing plate 203 through a flexible cloth 402. The two side edges of the pressing plate 401 and the flexible cloth 402 are attached to the inner side wall of the material transfer chute 201, thereby forming a sealing structure. There is a gap between the bottom surface of the pressing plate 401 and the inner wall of the material transfer chute 201 to form an outlet. The top surface of the pressing plate 401 is movably connected to an L-shaped rod 404 through a hinge 403. One end of the L-shaped rod 404 away from the pressing plate 401 is fixedly connected to the top edge of the portal frame 206. When the outlet end of the material transfer chute 201 is raised or lowered, the inner diameter of the outlet formed by the top surface of the pressing plate 401 and the inner wall of the material transfer chute 201 changes alternately, so as to perform an alternating operation of pressing and loosening on the cement powder. After the surface of the cement powder becomes compact, it hardly generates dust anymore;

[0035] The bagging mechanism 5 includes a return-shaped frame 501 disposed below the rectangular hole 103. The return-shaped frame 501 is disposed directly below the outlet end of the material transfer chute 201, so that the cement powder falls within the range of the return-shaped frame 501. The bag mouth of the packaging bag can be surrounded outside the return-shaped frame 501. The top surface of the return-shaped frame 501 is fixedly connected to the bottom surface of the strip board 102. Fixed pins 502 are provided on the outer side wall of the return-shaped frame 501, and the packaging bag is connected through a hook;

[0036] The dust and fog blowing mechanism 6 includes a nozzle 601 disposed on the inner wall of the return-shaped frame 501. The blowing direction of the nozzle 601 is inclined downward from the outside to the inside. One end of the nozzle 601 passes through the return-shaped frame 501 and is connected to a ventilation pipe 602. The end of the ventilation pipe 602 away from the nozzle 601 is communicated with an air bag 603. The air bag 603 can supply air to the nozzle 601 through an air pump, and blow the dust at the edge of the bag mouth of the packaging bag downward and inward, further playing a role in dust prevention.

[0037] Embodiment 2:

[0038] Refer to Figure 3, in addition to the airbag 603 in Embodiment 1 being supplied with air by an air pump, it can also be automatically supplied with air using the structure of the present application, that is, the following structure:

[0039] Lower support plates 105 are provided on both sides of the strip plate 102. The airbag 603 is placed on the top surface of the lower support plate 105. An upper support plate 604 is fixedly connected to the top of the airbag 603. The lower support plate 105 and the upper support plate 604 are supported by a spring 606 to ensure that the volume of the airbag 603 can be restored. A cam 605 is in contact with the top surface of the upper support plate 604. One of the support shafts 205 passes through the portal frame 206 and is fixedly connected to the cam 605. By rotating the support shaft 205 to drive the rotation of the cam 605, the height of the upper support plate 604 is increased or decreased, so that the volume of the airbag 603 changes alternately, and then blowing or suction is generated through the nozzle 601. Blowing is beneficial to blowing the dust inwards and downwards, and suction gradually absorbs the dust in the ventilation pipe 602 or the airbag 603, further playing a role in dust reduction.

[0040] Embodiment 3:

[0041] Refer to Figure 3 , in addition to the packaging bag installation method in Embodiment 1, another installation structure can also be adopted, as follows:

[0042] A clamping groove 503 is provided on the bottom surface of the loop frame 501. A loop-shaped wooden strip can be sleeved outside the packaging bag, the bag mouth is rolled up and then knocked into the clamping groove 503 to play a role in installing the packaging bag, which is more cooperative with the hook connection of the fixing pin 502, that is, the invention can adopt two installation structures for the packaging bag.

[0043] The working process of the present invention:

[0044] Refer to Figure 4-5 , combining Embodiments 1-3, the present invention constructs a seesaw-type transfer chute structure, which is driven by an eccentric wheel to periodically lift one end to generate vibration; at the same time, a pressing mechanism is provided, and the transfer chute itself swings periodically. Through the pressing plate 401, an alternating action of pressing and relaxing the surface of the cement powder is performed, so that the surface of the cement powder is relatively compact and falls into the bag in strip or sheet form, greatly reducing the amount of falling dust; and through the vibration of the transfer chute structure, the conveying speed is increased, so that the feeding and bagging speed during the dust prevention process remains at a relatively high level, and the conveying speed can be controlled by changing the inclination angle of the transfer chute and the swing frequency (i.e., controlled by a driving motor) to avoid aggregation to the greatest extent; by setting a dust and fog blowing mechanism and using the rotation of the support shaft connected to the transfer chute, the blowing and suction alternation process of the airbag is automatically controlled, and the amount of dust near the bag mouth is reduced to the greatest extent, basically achieving a dust-free feeding and bagging process, which is of great significance to the cement production workshop.

[0045] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, should be covered by the protection scope of the present invention.

Claims

1. A cement feeding dust prevention device, comprising a bracket (1), characterized in that: The support is composed of two legs (101) and a strip board (102) supported thereon, the strip board (102) being provided with a rectangular hole (103), and the support is provided with the following mechanisms: A material transfer mechanism (2) comprises a material transfer trough (201), wherein a feed hopper (202), a sealing plate (203) and an open mouth (204) are sequentially arranged at the top of the material transfer trough (201) along the length direction, the top of the feed hopper (202) is a funnel-shaped opening, the end of the material transfer trough (201) close to the feed hopper (202) is a closed end, and the end of the material transfer trough (201) away from the feed hopper (202) is an outlet end, the material transfer trough (201) is arranged in a slope with the closed end higher than the outlet end, the middle parts of the two outer side walls of the material transfer trough (201) are fixedly connected to support shafts (205), one end of the two support shafts (205) is mounted on a door-shaped frame (206), and the two side walls of the door-shaped frame (206) are provided with bearing holes that are rotatably matched with the support shafts (205); The driving mechanism (3) comprises a driving motor (301) arranged on the upper surface of the strip plate (102), the output shaft of the driving motor (301) being connected to an eccentric position on the surface of the disc (302), the top of the hub edge of the disc (302) being in contact with a fixing plate (303), the output shaft of the driving motor (301) being connected to the fixing plate (303) via an elastic rope (304), and the top of the elastic rope (304) being fixedly connected to the fixing plate (303); The material pressing mechanism (4) comprises a pressing plate (401) arranged in the open mouth (204), one side of the pressing plate (401) is fixedly connected to the sealing plate (203) via a flexible cloth (402), the two side edges of the pressing plate (401) and the flexible cloth (402) are in contact with the inner wall of the material transfer trough (201), thereby forming a sealing structure, and there is a gap between the bottom surface of the pressing plate (401) and the inner wall of the material transfer trough (201), thereby forming an outlet; the top surface of the pressing plate (401) is movably connected to an L-shaped rod (404) via a hinge (403), and the end of the L-shaped rod (404) away from the pressing plate (401) is fixedly connected to the top edge of the door-shaped frame (206); The bagging mechanism (5) comprises a circular frame (501) arranged below the rectangular hole (103), the circular frame (501) being arranged directly below the outlet end of the transfer trough (201), the top surface of the circular frame (501) being fixedly connected to the bottom surface of the strip board (102), and the outer side wall of the circular frame (501) being provided with a fixing pin (502) connected to the packaging bag via a hook; The dust and mist blowing mechanism (6) comprises a blowing nozzle (601) arranged on the inner wall of the circular frame (501), the blowing direction of the blowing nozzle (601) is inclined downward from the outside to the inside, one end of the blowing nozzle (601) passes through the circular frame (501) and is connected to a ventilation pipe (602), and the end of the ventilation pipe (602) away from the blowing nozzle (601) is connected to an air bag (603).

2. A cement feeding dust prevention device according to claim 1, characterized in that: The strip plate (102) is also provided with a strip hole (104) for the disc (302) to pass through.

3. A cement feeding dust prevention device according to claim 1, characterized in that: Lower support plates (105) are provided on both sides of the strip plate (102), the airbag (603) is placed on the top surface of the lower support plate (105), the top of the airbag (603) is fixedly connected to an upper support plate (604), the lower support plate (105) and the upper support plate (604) are supported by springs (606) to ensure that the volume of the airbag (603) can be restored, the top surface of the upper support plate (604) contacts a cam (605), one of the support shafts (205) passes through the door-shaped frame (206) and is fixedly connected to the cam (605), and the rotation of the cam (605) is driven by the rotation of the support shaft (205).

4. A cement feeding dust prevention device according to claim 1, characterized in that: The bottom surface of the circular frame (501) is provided with a snap-fitting notch (503), which is used to install the packaging bag by putting a circular wooden strip over the packaging bag, rolling up the bag opening and then knocking it into the snap-fitting notch (503).

5. A cement feeding dust prevention device according to claim 1, characterized in that: The flexible cloth (402) and the airbag (603) are both made of elastic rubber material with a deformation amount not exceeding 100%, and the thickness of the flexible cloth (402) is not less than 5 mm.

6. A cement feeding dust prevention device according to claim 1, characterized in that: A triangular plate (405) is also provided at the right angle of the L-shaped rod (404).

7. A cement feeding dust prevention device according to claim 1, characterized in that: The elastic rope (304) is made of a high-elasticity rubber material with a deformation amount of not less than 200%, the fixing plates (303) are fixedly connected to the elastic rope (304) by metal glue, and the output shaft of the driving motor (301) is provided with an annular groove for the elastic rope (304) to pass through.

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