Integrated negative pressure and positive pressure combined pneumatic conveying system

Abstract

The invention relates to the technical field of pneumatic conveying, and discloses an integrated negative-pressure and positive-pressure combined pneumatic conveying system which solves the problem that at present, a filter bag is inconvenient to mount quickly, the integrated negative-pressure and positive-pressure combined pneumatic conveying system comprises a box body, a pneumatic conveying mechanism is arranged in the box body, a mounting mechanism is arranged at the bottom of the box body, and a conveying pipeline is fixedly connected to the outer side of the box body; the end, away from the box body, of the conveying pipeline is fixedly connected with a material suction pipe, the bottom end of the material suction pipe is fixedly connected with a material suction nozzle, an opening is formed in the bottom of the box body, the mounting mechanism comprises a limiting frame located below the box body, the bottom of the limiting frame is fixedly connected with a storage box, and the outer side of the box body is symmetrically and fixedly connected with two guide plates; the limiting frame is arranged on the outer sides of the two guide plates in a sleeving mode, and a mounting frame is arranged at the bottom of the box body and corresponds to the opening; according to the device, the storage box and the two guide plates can be fixed, and then the mounting frame can be fixed to the bottom of the box body, so that a filter bag can be conveniently and quickly mounted.

Description

Technical Field

[0001] This invention belongs to the field of pneumatic conveying technology, specifically an integrated negative and positive pressure combined pneumatic conveying system. Background Technology

[0002] Pneumatic conveying is a technology that uses air or inert gas as the conveying medium and leverages the kinetic and pressure energy of airflow to transfer solid materials such as powders and granules within a closed pipeline. It has advantages such as dust-free and environmentally friendly operation, high conveying efficiency, and flexible spatial layout, and is widely used in material conveying scenarios in chemical, food, and feed industries. In an integrated negative and positive pressure combined pneumatic conveying system, after the material is carried into the pipeline by the negative pressure airflow, it needs to pass through a bag filter to complete the gas-solid separation operation. Fine material particles in the airflow are intercepted by the filter bags, and the filtered clean airflow can be directly discharged or recycled. The collected material falls into the transfer bin to provide raw materials for the subsequent positive pressure conveying process. Therefore, the bag filter is the core equipment to ensure the material recovery rate and exhaust gas emission compliance of the system.

[0003] In the existing technology, the filter bags of bag dust collectors are mostly fixed by bolts or clamps. During installation, the open end of the filter bag needs to be precisely aligned with the hole in the tube sheet, and then the fasteners are tightened one by one with special tools. The whole operation process is cumbersome and time-consuming, which makes it inconvenient to install the filter bags quickly. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides an integrated pneumatic conveying system combining negative and positive pressure, which effectively solves the problem of the inconvenience of quickly installing filter bags.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an integrated negative and positive pressure combined pneumatic conveying system, comprising a housing, wherein a pneumatic conveying mechanism is provided inside the housing, an installation mechanism is provided at the bottom of the housing, a conveying pipe is fixedly connected to the outside of the housing, a suction pipe is fixedly connected to the end of the conveying pipe away from the housing, a suction nozzle is fixedly connected to the bottom end of the suction pipe, and an opening is provided at the bottom of the housing.

[0006] The installation mechanism includes a limiting frame located at the bottom of the box, with a storage box fixedly connected to the bottom of the limiting frame. Two guide plates are symmetrically fixedly connected to the outside of the box, and the limiting frame is fitted over the outside of the two guide plates. An installation frame is provided at the bottom of the box, corresponding to the opening. The limiting frame is located at the bottom of the installation frame, and a filter bag is fixedly connected to the bottom of the installation frame. The storage box is located outside the filter bag. Multiple positioning rods are fixedly connected to the bottom of the installation frame, and the limiting frame is fitted over the outside of each positioning rod. Two placement round rods are symmetrically fixedly connected to the bottom of the box, and placement rings are fixedly fitted over the outside of each of the two placement round rods.

[0007] Preferably, the bottom of the storage box is fixedly connected to a base plate, and two guide rods are symmetrically fixedly connected between the base plate and the storage box. A retaining plate is movably sleeved between the two guide rods, and each guide plate is provided with a retaining groove, into which the retaining plate is inserted.

[0008] Preferably, a lead screw is rotatably connected to the outer side of the base plate, a clamping plate is threaded onto the outer side of the lead screw, and a handwheel is fixedly connected to the end of the lead screw away from the base plate.

[0009] Preferably, the pneumatic conveying mechanism includes a vertical plate fixed inside the housing, a filter plate fixedly connected to the vertical plate, a base fixedly installed inside the housing, the base being located on the side of the vertical plate away from the conveying pipe, and a Roots vacuum pump fixedly installed on the base.

[0010] Preferably, a trapezoidal plate is fixedly connected to the inner bottom wall of the box, the opening is located between the trapezoidal plate and the vertical plate, a vertical shaft is rotatably connected between the top of the trapezoidal plate and the box, two pillars are symmetrically fixedly connected inside the box, an inner box is fixedly connected between the two pillars, the vertical shaft passes through the inner box, a conical block is fixedly connected to the side of the inner box away from the vertical plate, and multiple blades are fixedly connected at equal angles on the upper and lower sides of the vertical shaft.

[0011] Preferably, the filter plate is rotatably connected to a side shaft on the side near the inner box, and a horizontal shaft is fixedly connected to the end of the side shaft away from the filter plate. The end of the horizontal shaft away from the side shaft extends into the inner box and is fixedly connected to a bevel gear one. A bevel gear two located in the inner box is fixedly installed on the outside of the vertical shaft. The bevel gear two meshes with the bevel gear one. A sleeve plate is fixedly sleeved on the outside of the horizontal shaft. Two brushes that are both in contact with the filter plate are symmetrically fixedly connected to the outside of the sleeve plate.

[0012] Preferably, two slide rods are symmetrically fixedly connected between the upright plate and the base. Slide plates are movably sleeved on the outer side of each slide rod. Springs are fixedly connected between each slide plate and the upright plate. Two springs are respectively sleeved on the outer side of each slide rod. Abutment rings are fixedly sleeved on the outer side of each slide rod. The two slide plates abut against the two abutment rings respectively. A movable disc is fixedly connected between the two slide plates. Multiple unblocking rods are evenly fixedly connected on the side of the movable disc near the filter plate. The unblocking rods correspond one-to-one with the filter holes on the filter plate, and the length of the filter hole is equal to the length of the unblocking rod.

[0013] Preferably, a positive pressure pipe is fixedly installed on the top of the conveying pipe, a cover plate is hinged to the top of the positive pressure pipe, a base two is fixedly installed inside the positive pressure pipe, and a Roots blower is fixedly installed on the base two.

[0014] Preferably, an inner ring is fixedly installed inside the positive pressure pipeline, the inner ring is located above the base two, and a dustproof net is provided on the top of the inner ring.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The present invention facilitates the placement of the installation frame by setting a placement rod and a placement ring, and by pushing the limiting frame on the outside of the two guide plates upward, it is easy for the installation frame to fit against the bottom of the box. By rotating the handwheel, the card plate can be inserted into the two card slots to fix the storage box to the two guide plates, and then the installation frame can be fixed to the bottom of the box, thereby facilitating the quick installation of the filter bag.

[0017] 2. This invention drives a Roots vacuum pump, which in turn moves a movable disc, causing two sliding plates to contact two abutment rings. This facilitates the deformation of two springs, creating negative pressure in the conveying pipe, which in turn facilitates the transport of materials into the housing. The blades rotate under the action of airflow, allowing the brush to automatically clean the filter plates. When the Roots vacuum pump is turned off, the movable disc moves under the elastic force of the two springs, allowing the unblocking rod to move and unblock the filter plates, preventing blockage. This allows the material to completely enter the filter bag through the opening for collection.

[0018] 3. This invention facilitates the injection of air into the conveying pipeline by opening the cover and starting the Roots blower, thereby facilitating the conveying of materials by the thrust of the high-pressure airflow. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0020] In the attached diagram:

[0021] Figure 1 This is a schematic diagram of the integrated negative and positive pressure combined pneumatic conveying system of the present invention;

[0022] Figure 2 This is a schematic cross-sectional view of the positive pressure pipeline structure of the present invention;

[0023] Figure 3 This is a schematic cross-sectional view of the box structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the installation mechanism of the present invention;

[0025] Figure 5 This is a schematic diagram of the disassembled structure of the limiting frame and the mounting frame of the present invention;

[0026] Figure 6 This is a schematic diagram of the pneumatic conveying mechanism of the present invention;

[0027] Figure 7 This is a schematic cross-sectional view of the inner box structure of the present invention.

[0028] In the diagram: 1. Box body; 2. Mounting mechanism; 201. Limiting frame; 202. Storage box; 203. Guide plate; 204. Base plate; 205. Lead screw; 206. Clamping plate; 207. Guide rod; 208. Handwheel; 209. Positioning rod; 2010. Placement rod; 2011. Placement ring; 2012. Slot; 2013. Filter bag; 2014. Mounting frame; 3. Pneumatic conveying mechanism; 301. Vertical plate; 302. Sleeve plate; 303. Horizontal shaft; 304. Vertical shaft; 305. Inner box; 306. Support column; 307. Blade; 308. Ladder 309. Side shaft; 3010. Brush; 3011. Filter plate; 3012. Slide plate; 3013. Base 1; 3014. Movable disc; 3015. Roots vacuum pump; 3016. Unblocking rod; 3017. Slide rod; 3018. Abutment ring; 3019. Spring; 3020. Conical block; 3021. Bevel gear 1; 3022. Bevel gear 2; 4. Conveying pipe; 5. Positive pressure pipe; 6. Cover plate; 7. Suction pipe; 8. Suction nozzle; 9. Inner ring; 10. Dustproof net; 11. Base 2; 12. Roots blower; 13. Opening. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] Example 1, by Figures 1-7 The present invention relates to an integrated pneumatic conveying system combining negative and positive pressure, comprising a housing 1, a pneumatic conveying mechanism 3 inside the housing 1, an installation mechanism 2 at the bottom of the housing 1, a conveying pipe 4 fixedly connected to the outside of the housing 1, a suction pipe 7 fixedly connected to the end of the conveying pipe 4 away from the housing 1, a suction nozzle 8 fixedly connected to the bottom end of the suction pipe 7, and an opening 13 at the bottom of the housing 1.

[0031] In Example 2, based on Example 1, the installation mechanism 2 includes a limiting frame 201 located below the housing 1. A storage box 202 is fixedly connected to the bottom of the limiting frame 201. Two guide plates 203 are symmetrically fixedly connected to the outside of the housing 1. The limiting frame 201 is fitted onto the outside of the two guide plates 203. A mounting frame 2014 is provided at the bottom of the housing 1, corresponding to the opening 13. The limiting frame 201 is located at the bottom of the mounting frame 2014. A filter bag 2013 is fixedly connected to the bottom of the mounting frame 2014. The storage box 202 is located outside the filter bag 2013. Multiple positioning rods 209 are fixedly connected to the bottom of the mounting frame 2014, and the limiting frame 201 is fitted onto each positioning rod 209. On the outside of 09, two placement rods 2010 are symmetrically fixedly connected to the bottom of the box 1. Placement rings 2011 are fixedly sleeved on the outside of the two placement rods 2010. The bottom of the storage box 202 is fixedly connected to the bottom plate 204. Two guide rods 207 are symmetrically fixedly connected between the bottom plate 204 and the storage box 202. A locking plate 206 is movably sleeved between the two guide rods 207. Each of the two guide plates 203 is provided with a slot 2012. The locking plate 206 is inserted into the two slots 2012. A lead screw 205 is rotatably connected to the outside of the bottom plate 204. The locking plate 206 is threaded onto the outside of the lead screw 205. A handwheel 208 is fixedly connected to the end of the lead screw 205 away from the bottom plate 204.

[0032] First, the mounting frame 2014 is placed over the outside of the two placement rods 2010, so that the mounting frame 2014 is located on top of the two placement rings 2011. Then, the limiting frame 201 is placed over the outside of the two guide plates 203 and pushed upward, so that the limiting frame 201 is placed over the outside of each positioning rod 209 and pushes the mounting frame 2014 until the mounting frame 2014 abuts against the bottom of the box 1. Then, the handwheel 208 is rotated, which drives the lead screw 205 to rotate and drives the clamping plate 206 to slide along the two guide rods 207 until the clamping plate 206 is inserted into the two clamping slots 2012, fixing the storage box 202 to the two guide plates 203 and fixing the mounting frame 2014. Finally, the filter bag 2013 is quickly installed.

[0033] In Example 3, based on Example 1, the pneumatic conveying mechanism 3 includes a vertical plate 301 fixed inside the housing 1, a filter plate 3011 fixedly connected to the vertical plate 301, a base 3013 fixedly installed inside the housing 1, the base 3013 located on the side of the vertical plate 301 away from the conveying pipe 4, a Roots vacuum pump 3015 fixedly installed on the base 3013, a trapezoidal plate 308 fixedly connected to the inner bottom wall of the housing 1, an opening 13 located between the trapezoidal plate 308 and the vertical plate 301, and a vertical shaft 304 rotatably connected between the top of the trapezoidal plate 308 and the housing 1. The filter plate 3011 is symmetrically and fixedly connected to two support columns 306, and an inner box 305 is fixedly connected between the two support columns 306. A vertical shaft 304 passes through the inner box 305. A conical block 3020 is fixedly connected to the side of the inner box 305 away from the vertical plate 301. By setting the conical block 3020, the flow resistance of airflow and material is reduced. Multiple blades 307 are fixedly connected at equal angles on the upper and lower sides of the vertical shaft 304. A side shaft 309 is rotatably connected to the side of the filter plate 3011 near the inner box 305. A horizontal shaft 303 is fixedly connected to the end of the side shaft 309 away from the filter plate 3011. The horizontal shaft 303 is located away from the side shaft 309. One end extends into the inner box 305 and is fixedly connected to a bevel gear 3021. A second bevel gear 3022 located inside the inner box 305 is fixedly installed on the outer side of the vertical shaft 304. The second bevel gear 3022 meshes with the first bevel gear 3021. A sleeve plate 302 is fixedly sleeved on the outer side of the horizontal shaft 303. Two brushes 3010, each in contact with the filter plate 3011, are symmetrically fixedly connected to the outer side of the sleeve plate 302. Two slide rods 3017 are symmetrically fixedly connected between the vertical plate 301 and the base 3013. Slide plates 3012 are movably sleeved on the outer sides of both slide rods 3017. Springs 3019 are fixedly connected to the upright plate 301. Two springs 3019 are respectively sleeved on the outside of two slide rods 3017. Abutment rings 3018 are fixedly sleeved on the outside of two slide rods 3017. Two slide plates 3012 abut against the two abutment rings 3018 respectively. A movable plate 3014 is fixedly connected between the two slide plates 3012. Multiple unblocking rods 3016 are evenly fixedly connected on the side of the movable plate 3014 near the filter plate 3011. The unblocking rods 3016 correspond one-to-one with the filter holes on the filter plate 3011, and the length of the filter hole is equal to the length of the unblocking rod 3016.

[0034] First, the Roots vacuum pump 3015 is started, adsorbing the movable disc 3014 and causing it to move. This drives the two sliding plates 3012 to slide along the two sliding rods 3017 until the two sliding plates 3012 abut against the two abutting rings 3018. At this time, both springs 3019 are stretched, creating a negative pressure in the conveying pipe 4 to transport the material into the housing 1. The filter plate 3011 blocks the material, while the blades 307 rotate under the influence of the airflow, driving the vertical shaft 304 to rotate. Due to the interaction between the second bevel gear 3022 and the first bevel gear 3017... 21 engages, thereby driving the horizontal shaft 303 to rotate, and through the sleeve plate 302, driving the two brushes 3010 to rotate, realizing automatic cleaning of the filter plate 3011. When the Roots vacuum pump 3015 is turned off, the two springs 3019 reset, driving the two slide plates 3012 to slide along the two slide rods 3017 respectively. At the same time, the movable disc 3014 moves horizontally until it abuts against the filter plate 3011, and the unblocking rod 3016 unblocks the filter plate 3011 to prevent the filter plate 3011 from becoming blocked. Finally, the material completely enters the filter bag 2013 from the opening 13 for collection.

[0035] In Example 4, based on Example 1, a positive pressure pipe 5 is fixedly installed on the top of the conveying pipe 4. A cover plate 6 is hinged to the top of the positive pressure pipe 5. A base 2 11 is fixedly installed inside the positive pressure pipe 5. A Roots blower 12 is fixedly installed on the base 2 11. An inner ring 9 is fixedly installed inside the positive pressure pipe 5. The inner ring 9 is located above the base 2 11. A dustproof net 10 is provided on the top of the inner ring 9. By setting the dustproof net 10, external dust is prevented from entering the conveying pipe 4 through the positive pressure pipe 5. The dustproof net 10 is fixed to the top of the inner ring 9 with bolts, which facilitates the disassembly and cleaning of the dustproof net 10.

[0036] First, open the cover plate 6, then start the Roots blower 12 to draw in outside air into the conveying pipe 4, so that the material in the conveying pipe 4 is conveyed by the thrust of the high-pressure airflow. At the same time, it works in conjunction with the Roots vacuum pump 3015 to achieve the integration of negative and positive pressure to improve the conveying effect of the material.

Claims

1. An integrated negative pressure and positive pressure combined pneumatic conveying system comprising a cabinet (1), characterized in that: The inside of the box (1) is provided with a pneumatic conveying mechanism (3), the bottom of the box (1) is provided with a mounting mechanism (2), the outside of the box (1) is fixedly connected with a conveying pipeline (4), one end of the conveying pipeline (4) away from the box (1) is fixedly connected with a suction pipe (7), the bottom end of the suction pipe (7) is fixedly connected with a suction nozzle (8), and the bottom of the box (1) is provided with an opening (13); The mounting mechanism (2) comprises a limiting frame (201) located below the box (1), the bottom of the limiting frame (201) is fixedly connected with a storage box (202), the outside of the box (1) is fixedly connected with two guide plates (203) in a symmetrical manner, the limiting frame (201) is sleeved on the outside of the two guide plates (203), the bottom of the box (1) is provided with a mounting frame (2014), the mounting frame (2014) corresponds to the opening (13), the limiting frame (201) is located at the bottom of the mounting frame (2014), the bottom of the mounting frame (2014) is fixedly connected with a filter bag (2013), the storage box (202) is located outside the filter bag (2013), the bottom of the mounting frame (2014) is fixedly connected with a plurality of positioning rods (209), the limiting frame (201) is sleeved on the outside of each positioning rod (209), and the bottom of the box (1) is fixedly connected with two placing round rods (2010) in a symmetrical manner. The outside of the two placing round rods (2010) is fixedly sleeved with a placing ring (2011).

2. The integrated negative and positive pressure combined pneumatic conveying system of claim 1, wherein: The bottom of the storage box (202) is fixedly connected with a bottom plate (204), two guide round rods (207) are fixedly connected between the bottom plate (204) and the storage box (202) in a symmetrical manner, and a clamping plate (206) is movably sleeved between the two guide round rods (207). The two guide plates (203) are each provided with a clamping groove (2012), and the clamping plate (206) is inserted into the two clamping grooves (2012).

3. The integrated negative and positive pressure combination pneumatic conveying system of claim 2, wherein: The outside of the bottom plate (204) is rotatably connected with a lead screw (205), the clamping plate (206) is threadedly sleeved on the outside of the lead screw (205), and one end of the lead screw (205) away from the bottom plate (204) is fixedly connected with a hand wheel (208).

4. The integrated negative and positive pressure combination pneumatic conveying system of claim 1, wherein: The pneumatic conveying mechanism (3) comprises a vertical plate (301) fixed in the box (1), the vertical plate (301) is fixedly connected with a filter plate (3011), a first machine base (3013) is fixedly installed in the box (1), the first machine base (3013) is located on the side of the vertical plate (301) away from the conveying pipeline (4), and a Roots vacuum pump (3015) is fixedly installed on the first machine base (3013).

5. The integrated negative and positive pressure combination pneumatic conveying system of claim 1, wherein: The inner bottom wall of the box body (1) is fixedly connected with a trapezoidal plate (308), the opening (13) is located between the trapezoidal plate (308) and the vertical plate (301), the top of the trapezoidal plate (308) is rotatably connected with a vertical shaft (304) between the box body (1), the inside of the box body (1) is symmetrically fixedly connected with two struts (306), the two struts (306) are fixedly connected with an inner box (305) between them, the vertical shaft (304) penetrates through the inner box (305), the side, away from the vertical plate (301), of the inner box (305) is fixedly connected with a conical block (3020), and the upper and lower sides of the vertical shaft (304) are fixedly connected with a plurality of blades (307) at equal angles.

6. The integrated negative and positive pressure combination pneumatic conveying system of claim 4, wherein: The side, close to the inner box (305), of the filter plate (3011) is rotatably connected with a side shaft (309), one end of the side shaft (309), away from the filter plate (3011), is fixedly connected with a horizontal shaft (303), the end of the horizontal shaft (303), away from the side shaft (309), extends into the inner box (305) and is fixedly connected with a bevel gear one (3021), the outer side of the vertical shaft (304) is fixedly installed with a bevel gear two (3022) located in the inner box (305), the bevel gear two (3022) is engaged with the bevel gear one (3021), the outer side of the horizontal shaft (303) is fixedly sleeved with a sleeve plate (302), and the outer side of the sleeve plate (302) is symmetrically fixedly connected with two brushes (3010) abutting against the filter plate (3011).

7. The integrated negative and positive pressure combination pneumatic conveying system of claim 4, wherein: The vertical plate (301) and the base one (3013) are symmetrically fixedly connected with two slide rods (3017), the outer sides of the two slide rods (3017) are movably sleeved with two sliding plates (3012), the two sliding plates (3012) and the vertical plate (301) are fixedly connected with two springs (3019), the two springs (3019) are sleeved on the outer sides of the two slide rods (3017) respectively, the outer sides of the two slide rods (3017) are fixedly sleeved with two abutting rings (3018), the two sliding plates (3012) abut against the two abutting rings (3018) respectively, the two sliding plates (3012) are fixedly connected with a movable disc (3014), a plurality of dredging rods (3016) are uniformly fixedly connected on the side, close to the filter plate (3011), of the movable disc (3014), the dredging rods (3016) correspond to the filter holes on the filter plate (3011) one by one, and the length value of the filter holes is equal to the length value of the dredging rods (3016).

8. The integrated negative and positive pressure combination pneumatic conveying system of claim 1, wherein: The top of the conveying pipeline (4) is fixedly installed with a positive pressure pipeline (5), the top end of the positive pressure pipeline (5) is hingedly connected with a cover plate (6), the inside of the positive pressure pipeline (5) is fixedly installed with a base two (11), and the base two (11) is fixedly installed with a Roots blower (12).

9. The integrated negative and positive pressure combined pneumatic conveying system of claim 8, wherein: The inside of the positive pressure pipeline (5) is fixedly installed with an inner ring (9), the inner ring (9) is located above the base two (11), and the top of the inner ring (9) is provided with a dust screen (10).

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