CN112693902A

CN112693902A - Positive-pressure pneumatic conveying system for granular dust

Info

Publication number: CN112693902A
Application number: CN202011596430.6A
Authority: CN
Inventors: 李政权; 柯洪成; 许梁; 张佩; 熊仕显; 张思钊; 顾锋; 孙永昌; 曾琦; 郑诚林
Original assignee: Jiangxi Zhenque Technology Co ltd; Jiangxi University of Science and Technology
Current assignee: Jiangxi University of Science and Technology
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-04-23
Anticipated expiration: 2040-12-29
Also published as: CN112693902B

Abstract

The invention discloses a positive-pressure pneumatic conveying system for granular dust, which comprises a device main body, wherein the device main body comprises an air blower, a mixing device is arranged on one side of the air blower, the mixing device comprises a mixing box, the side wall of the mixing box is connected with the output end of the air blower in a penetrating manner, the top of the mixing box is connected with a feeding box, the inner wall of the feeding box is connected with a feeding plate in a sliding manner, a driving assembly is arranged on one side of the feeding plate, a cyclone separator is arranged on one side of the mixing box, a pipeline device is arranged between the cyclone separator and the mixing box, the bottom of the cyclone separator is connected with a storage bin, the pipeline device comprises two straight pipes, the two straight pipes are respectively connected with the mixing box and the cyclone separator, two connecting assemblies are arranged on each straight pipe. The conveying system provided by the invention can control the air mixing ratio of materials in the conveying pipeline, is convenient for maintaining and replacing the bent pipe, and can still continue to work when the bent pipe is replaced.

Description

Positive-pressure pneumatic conveying system for granular dust

Technical Field

The invention relates to the technical field of dust conveying, in particular to a positive-pressure pneumatic conveying system for granular dust.

Background

The granular dust can be transported by adopting pneumatic conveying, and the pneumatic conveying utilizes the energy of airflow to convey granular materials in the closed pipeline along the airflow direction.

According to the pneumatic conveying system for the mixed dust in the steel industry, which is provided by the patent document with the application number of CN201620993646.9, the pneumatic conveying system comprises a fan, a pressure transmitter, a pneumatic conveying pump and a dust storage bin, wherein the fan, the pressure transmitter, the pneumatic conveying pump and the dust storage bin are connected through a wear-resistant conveying pipeline, and a venturi tube is arranged on the wear-resistant conveying pipeline between the pneumatic conveying pump and the dust storage bin. The product has firm and wear-resistant structure and high dust pumping efficiency.

The abrasion degree of a conveying pipeline of the particle dust during conveying is related to the mixing ratio of materials and air, and the condition that an elbow pipe is abraded exists in the conveying pipeline. Although the product in the patent is firm in structure and wear-resistant, the problem is not solved from the root, and the defects of easy damage and difficult maintenance still exist. Therefore, it is necessary to design a pneumatic conveying system which can control the air mixing ratio of materials in a conveying pipeline, is convenient for the maintenance and replacement of the elbow pipe and can still continue to work when the elbow pipe is replaced.

Disclosure of Invention

The invention mainly provides a positive pressure pneumatic conveying system for granular dust, which is used for solving the technical problems in the background technology.

In order to achieve the purpose, the invention adopts the following technical scheme:

a positive-pressure pneumatic conveying system for granular dust comprises a device main body, wherein the device main body comprises an air blower, the bottom of the air blower is fixed on the ground, one side of the air blower is provided with a mixing device, the mixing device comprises a mixing box, the side wall of the mixing box is in through connection with the output end of the air blower, the top of the mixing box is connected with a feeding box, the inner wall of the feeding box is in sliding connection with a feeding plate, and one side of the feeding plate is provided with a driving assembly;

mixing box one side is equipped with cyclone, cyclone with be equipped with plumbing between mixing box, the feed bin is connected to the cyclone bottom, plumbing includes two straight tubes, two mixing box and cyclone are connected respectively to the straight tube, every all be equipped with two coupling assembling on the straight tube, four be equipped with two return bends between the coupling assembling, the straight tube lateral wall is two be equipped with slip subassembly and seal assembly between the coupling assembling.

Preferably, the inner wall of the feeding box is an inclined plane, a plurality of partition plates are arranged in the feeding box, the bottom of the feeding plate is in through connection with a plurality of feeding boxes, the feeding boxes extend into the mixing box, and each feeding box is internally provided with a vibration assembly. In the preferred embodiment, the feeding amount is controllable through the matching of the feeding box and the feeding plate.

Preferably, the vibration assembly comprises a vibration motor, the vibration motor is fixed to the bottom of the inner wall of the material inlet box, and the output end of the vibration motor is connected with the base plate. In the preferred embodiment, the vibration assembly facilitates rapid mixing of particulate dust with air in the feed box.

Preferably, the drive assembly includes fixed case, fixed case is fixed at feeding case lateral wall, fixed incasement fixation driving motor, the driving motor output runs through feeding case lateral wall and connects the carousel, connect eccentric transfer line on the carousel, eccentric transfer line cooperation contact slider, the feed plate is connected at the slider top, slider bottom sliding connection slide rail board, the slide rail board is fixed in feeding incasement wall bottom. In the preferred embodiment, the reciprocating motion of the feed plate is achieved by a drive assembly.

Preferably, a driving groove is formed in the sliding block, the width of the driving groove is equal to the diameter of the eccentric transmission rod, and the inner wall of the driving groove is connected with the eccentric transmission rod in a sliding mode. In the preferred embodiment, the driving sliding groove is matched with the eccentric transmission rod so as to drive the sliding block to slide.

Preferably, two coupling assembling all includes the connecting pipe, two the connecting pipe is link up respectively and is connected straight tube one end and lateral wall, two the connecting pipe inner wall contacts two respectively return bend one end, the connecting pipe outer wall cup joints the locking pipe, locking subassembly is located to locking pipe one side. In the preferred embodiment, the elbow is easily disassembled and assembled by the connecting assembly.

Preferably, a plurality of elastic sheets are arranged at one end of the connecting pipe, the bottom of the locking pipe is in threaded connection with the outer wall of the connecting pipe, the inner wall of the locking pipe is an inclined plane, and the inclined plane of the inner wall of the locking pipe contacts with the elastic sheets. In the preferred embodiment, the locking function is realized by the cooperation of the elastic sheet and the inclined surface of the inner wall of the locking pipe.

Preferably, the locking subassembly includes spacing platform, the connecting pipe lateral wall is located to spacing platform, be equipped with the elasticity snap ring on the spacing platform, the elasticity snap ring cup joints the connecting pipe outer wall. In the preferred embodiment, the locking tube is prevented from loosening after being locked by the loosening prevention assembly.

Preferably, the sliding assembly comprises a sliding frame, a long through hole penetrates through the bottom of the sliding frame to be connected with the sealing plate, the long through hole is formed in the side wall of the straight pipe, and a leak hole is formed in the sealing plate. In the preferred embodiment, the sealing of the backup elbow is facilitated by the slide assembly while the activation of the seal assembly is facilitated.

Preferably, the sealing assembly comprises a sleeve and a connecting rod, the bottom of the sleeve is in through connection with the side wall of the straight pipe, the connecting rod penetrates through the top of the sleeve and extends to the inner connection sealing ball, a clamping table is arranged on the outer wall of the connecting rod, a spring is arranged on the clamping table, and the spring sleeve is connected with the outer wall of the connecting rod. In the preferred embodiment, the seal assembly facilitates sealing of the ends of the elbow should the elbow fail.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the mixing ratio of materials and air is convenient to control through the mixing device, the feeding amount of the mixing device is controllable through the matching of the feeding box and the feeding plate, and the superposition of the bottom of the feeding box and the feeding box at the bottom of the feeding plate is primary feeding;

the reciprocating motion of the feeding plate is realized through the driving assembly, the feeding is carried out twice through one reciprocating motion, and the feeding times are controlled by controlling the rotation speed of the output end of the driving motor;

the particle dust in the feeding box can be conveniently and rapidly mixed with air through the vibration assembly, and the bent pipe can be maintained and replaced conveniently through the pipeline device, and meanwhile, the whole device can normally work;

in addition, the pipeline device is provided with a main bent pipe and a standby bent pipe which are convenient to detach and install, the standby bent pipe is sealed through a sliding assembly during normal work, and the main bent pipe works; when main return bend damaged, the sliding assembly starts seal assembly when opening reserve return bend, can seal main return bend both ends through seal assembly.

Additional features and advantages of the disclosure will be set forth in the description which follows, or in part may be learned by the practice of the above-described techniques of the disclosure, or may be learned by practice of the disclosure.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

FIG. 1 is an isometric view of the overall structure of a positive pressure pneumatic conveying system for granular dust according to the present invention;

FIG. 2 is a structural isometric view of a drive assembly in the positive pressure pneumatic conveying system for particulate dust according to the present invention;

FIG. 3 is a structural perspective view of a piping device in the positive pressure pneumatic conveying system for granular dust according to the present invention;

FIG. 4 is a structural isometric view of a sliding assembly and a sealing assembly in the positive pressure pneumatic conveying system for granular dust according to the present invention;

FIG. 5 is a side view showing the overall structure of the positive pressure pneumatic conveying system for granular dust according to the present invention;

FIG. 6 is an enlarged view of the structure at "A" in FIG. 5;

fig. 7 is a structural side view of a mixing device in the positive pressure pneumatic conveying system for granular dust, which is provided by the invention.

Description of the main symbols:

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 7, the present invention provides a positive pressure pneumatic conveying system for particle dust, which includes a device main body 1.

The device body 1 includes a blower 11, the bottom of the blower 11 is fixed on the ground, and a mixing device 2 is provided at one side of the blower 11.

The mixing device 2 comprises a mixing box 21, and the output end of the air blower 11 penetrates through the side wall of the mixing box 21. The top of the mixing box 21 is connected with a feeding box 22, and the inner wall of the feeding box 22 is connected with a feeding plate 23 in a sliding way. A driving assembly 24 is provided at one side of the feed plate 23, and the inner wall of the feed box 22 is a slope.

In this embodiment, a plurality of partitions 221 are provided in the feed box 22, and a plurality of feed boxes 231 are connected to the bottom of the feed plate 23. Wherein, the feeding box 231 extends into the mixing box 21, and a vibration assembly 232 is arranged in each feeding box 231.

Specifically, for the vibration assembly 232, the vibration assembly 232 includes a vibration motor 2321. The vibration motor 2321 is fixed at the bottom of the inner wall of the material inlet box 231, and the output end of the vibration motor 2321 is connected with the pad 2322.

In this embodiment, the driving assembly 24 includes a fixing box 241, and the fixing box 241 is fixed to a sidewall of the feeding box 22. A drive motor 242 is fixed in the fixing case 241. The output end of the driving motor 242 penetrates through the side wall of the feeding box 22 and is connected with a rotating disc 243, and an eccentric transmission rod 244 is connected to the rotating disc 243.

In addition, the eccentric transmission rod 244 is in mating contact with a sliding block 245, and a feed plate 23 is attached to the top of the sliding block 245. A slide plate 246 is slidably connected to the bottom of the slide 245, and the slide plate 246 is fixed to the bottom of the inner wall of the feeding box 22. Further, the slider 245 is provided with a driving groove 2451. Wherein the width of the driving groove 2451 is the same as the diameter of the eccentric transmission rod 244. In addition, an eccentric transmission rod 244 is slidably coupled to an inner wall of the driving groove 2451.

Specifically, during feeding, the granular dust to be transported is added into the feeding box 22, the air blower 11 is turned on, and the output end of the air blower 11 sends air into the mixing box 21. The driving motor 242 is turned on, the output end of the driving motor 242 drives the rotating disc 243 to rotate, the rotating disc 243 drives the eccentric transmission rod 244 to slide in the driving groove 2451 and drives the sliding block 245 to slide in a reciprocating manner, and the rotating disc 243 rotates a circle of the feeding plate 23 to complete a reciprocating movement. In this embodiment, the bottom of the feeding box 22 coincides with the feeding box 231 at the bottom of the feeding plate 23, i.e. one feeding, and one reciprocating movement is twice feeding.

In addition, the feeding times are controlled by controlling the speed of rotation of the output end of the driving motor 242. After the particle dust enters the feeding box 231, the vibration motor 2321 drives the backing plate 2322 to vibrate, and the particle dust is rapidly mixed with air through the holes on the feeding box 231 and enters the duct device 3 after being mixed.

Referring to fig. 1, 3, 5 and 6, a cyclone 12 is provided at one side of the mixing box 21. A pipe device 3 is arranged between the cyclone separator 12 and the mixing box 21. The bottom of the cyclone 12 is connected to a silo 13. In addition, the above-mentioned pipe device 3 includes two straight pipes 31, the two straight pipes 31 are respectively connected to the mixing box 21 and the cyclone 12, and each straight pipe 31 is provided with two connecting assemblies 32.

In this embodiment, there are two elbows 33 between the four connection assemblies 32. Wherein, two coupling assembling 32 all include connecting pipe 321, and two connecting pipes 321 link up one end and the lateral wall of connecting straight tube 31 respectively. The inner walls of the two connection pipes 321 are in contact with one ends of the two bent pipes 33, respectively. In addition, the outer wall of the connecting pipe 321 is sleeved with a locking pipe 322, and one side of the locking pipe 322 is provided with a locking assembly 323.

Wherein, one end of the connecting pipe 321 is provided with a plurality of elastic pieces 3211. The bottom of the locking tube 322 is threadedly coupled to the outer wall of the coupling tube 321. In this embodiment, the inner wall of the locking tube 322 is an inclined surface, and the inclined surface of the inner wall of the locking tube 322 contacts with the elastic sheet 3211.

Specifically, the anti-loose assembly 323 includes a limiting table 3231, and the limiting table 3231 is disposed on a side wall of the connecting pipe 321. An elastic snap ring 3232 is arranged on the limiting table 3231, and the elastic snap ring 3232 is sleeved on the outer wall of the connecting pipe 321.

In practical application, when the elbow 33 needs to be replaced, the locking tube 322 is unscrewed, and the inclined surface of the inner wall of the locking tube 322 leaves the elastic sheet 3211. The elastic piece 3211 releases the bent pipe 33, and then the bent pipe 33 is removed, so that the two ends of the new bent pipe 33 are inserted into the two connection pipes 321, respectively, and then the locking pipe 322 is tightened. Because the bottom of the locking tube 322 is in contact with the elastic snap ring 3232, the elastic snap ring 3232 applies a pushing force to the locking tube 322 to prevent the locking tube 322 from loosening.

Referring to fig. 1, 3, 4 and 5, a sliding assembly 34 and a sealing assembly 35 are disposed on the sidewall of the straight tube 31 between the two connecting assemblies 32.

Specifically, the sliding assembly 34 includes a sliding frame 341, and the bottom of the sliding frame 341 penetrates through the long through hole 342 and is connected to the sealing plate 343. The long through hole 342 is disposed on the side wall of the straight tube 31, and the sealing plate 343 has a leak 3431.

Further, the seal assembly 35 includes a sleeve 351 and a connecting rod 352. The bottom of the sleeve 351 is connected to the side wall of the straight pipe 31. A connecting rod 352 extends through the top of the sleeve 351 to the inside and is connected with a sealing ball 353, and a clamping table 354 is arranged on the outer wall of the connecting rod 352. Wherein, a spring 355 is arranged on the clamping platform 354, and the spring 355 is sleeved on the outer wall of the connecting rod 352.

After the service elbow 33 is broken, the carriage 341 is slid and the carriage 341 moves the backup elbow 33 to open. When the sealing plate 343 moves to the position where the leak hole 3431 coincides with the bottom of the sleeve 351, the spring 355 pushes the connecting rod 352 to move downwards, and the sealing balls 353 seal the two ends of the working elbow 33. After the work elbow 33 is replaced, the sliding assembly 34 is reset by moving the sealing ball 353 up through the connecting rod 352.

The specific process of the invention is as follows:

during feeding, adding the particle dust to be transported into the feeding box 22, starting the air blower 11, and conveying air into the mixing box 21 from the output end of the air blower 11;

the driving motor 242 is turned on, and the output end of the driving motor 242 drives the turntable 243 to rotate. The turntable 243 drives the eccentric transmission rod 244 to slide in the driving groove 2451 and drives the sliding block 245 to slide in a reciprocating manner, the turntable 243 rotates for a circle to complete one reciprocating movement of the feeding plate 23, the bottom of the feeding box 22 is overlapped with the feeding box 231 at the bottom of the feeding plate 23 to form one-time feeding, and the one-time reciprocating movement is used for feeding twice;

the feeding frequency is controlled by controlling the rotation speed of the output end of the driving motor 242, and the vibrating motor 2321 drives the pad 2322 to vibrate after the particle dust enters the feeding box 231. The particulate dust is rapidly mixed with air through holes in the feed box 231 and enters the duct assembly 3 after mixing. The particle dust is conveyed by the pipeline device 3 and then enters the cyclone separator 12, and after being separated by the cyclone separator 12, the particle dust enters the storage bin 13;

when the service elbow 33 is damaged, the sliding

rack

341, 341 moves the backup elbow 33 to open. When the sealing plate 343 moves to the position where the leak hole 3431 coincides with the bottom of the sleeve 351, the spring 355 pushes the connecting rod 352 to move downwards, the sealing ball 353 seals two ends of the working elbow 33, and the standby elbow 33 works at the moment;

when the elbow 33 needs to be replaced, the locking pipe 322 is unscrewed, and the inner wall slope of the locking pipe 322 leaves the elastic sheet 3211. The spring plate 3211 releases the bent tube 33, and the bent tube 33 can be removed. After inserting the two ends of the new elbow 33 into the two connecting pipes 321, the locking pipe 322 is tightened. Because the bottom of the locking tube 322 is connected with the elastic snap ring 3232, the elastic snap ring 3232 provides thrust to the locking tube 322, so that the locking tube 322 can be prevented from loosening. When the work elbow 33 is replaced, the sliding assembly 34 is reset by moving the sealing ball 353 up through the connecting rod 352.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The positive-pressure pneumatic conveying system for the granular dust comprises a device main body (1) and is characterized in that the device main body (1) comprises a blower (11), the bottom of the blower (11) is fixed on the ground, a mixing device (2) is arranged on one side of the blower (11), the mixing device (2) comprises a mixing box (21), the side wall of the mixing box (21) is connected with the output end of the blower (11) in a penetrating manner, the top of the mixing box (21) is connected with a feeding box (22), the inner wall of the feeding box (22) is connected with a feeding plate (23) in a sliding manner, and one side of the feeding plate (23) is provided with a driving assembly (24);

mixing box (21) one side is equipped with cyclone (12), cyclone (12) with be equipped with pipe device (3) between mixing box (21), feed bin (13) is connected to the bottom of cyclone (12), pipe device (3) include two straight tube (31), two mixing box (21) and cyclone (12) are connected respectively in straight tube (31), every all be equipped with two coupling assembling (32) on straight tube (31), four be equipped with two return bend (33) between coupling assembling (32), two be equipped with sliding assembly (34) and seal assembly (35) between coupling assembling (32).

2. The positive-pressure pneumatic conveying system for granular dust according to claim 1, wherein the inner wall of the feeding box (22) is an inclined surface, a plurality of partition plates (221) are arranged in the feeding box (22), the bottom of the feeding plate (23) is connected with a plurality of feeding boxes (231) in a penetrating manner, the feeding boxes (231) extend into the mixing box (21), and a vibration assembly (232) is arranged in each feeding box (231).

3. The positive pressure pneumatic conveying system for particle dust according to claim 2, wherein the vibration assembly (232) comprises a vibration motor (2321), the vibration motor (2321) is fixed at the bottom of the inner wall of the material inlet box (231), and the output end of the vibration motor (2321) is connected with a backing plate (2322).

4. The positive-pressure pneumatic conveying system for granular dust according to claim 1, wherein the driving assembly (24) comprises a fixed box (241), the fixed box (241) is fixed on the side wall of the feeding box (22), a driving motor (242) is fixed in the fixed box (241), the output end of the driving motor (242) penetrates through the side wall of the feeding box (22) and is connected with a turntable (243), an eccentric driving rod (244) is connected to the turntable (243), the eccentric driving rod (244) is in fit contact with a sliding block (245), the top of the sliding block (245) is connected with a feeding plate (23), the bottom of the sliding block (245) is slidably connected with a sliding rail plate (246), and the sliding rail plate (246) is fixed at the bottom of the inner wall of the feeding box (22).

5. The positive-pressure pneumatic conveying system for granular dust according to claim 4, wherein a driving groove (2451) is formed in the sliding block (245), the width of the driving groove (2451) is the same as the diameter of the eccentric transmission rod (244), and the eccentric transmission rod (244) is connected to the inner wall of the driving groove (2451) in a sliding mode.

6. The positive-pressure pneumatic conveying system for granular dust according to claim 1, wherein each of the two connecting assemblies (32) comprises a connecting pipe (321), the two connecting pipes (321) are respectively connected with one end and a side wall of the straight pipe (31) in a penetrating manner, inner walls of the two connecting pipes (321) are respectively contacted with one ends of the two bent pipes (33), a locking pipe (322) is sleeved on an outer wall of each connecting pipe (321), and a locking assembly (323) is arranged on one side of each locking pipe (322).

7. The positive-pressure pneumatic conveying system for granular dust according to claim 6, wherein one end of the connecting pipe (321) is provided with a plurality of elastic pieces (3211), the bottom of the locking pipe (322) is in threaded connection with the outer wall of the connecting pipe (321), the inner wall of the locking pipe (322) is an inclined surface, and the inclined surface of the inner wall of the locking pipe (322) is in contact with the elastic pieces (3211).

8. The positive-pressure pneumatic conveying system for granular dust according to claim 6, wherein the anti-loosening assembly (323) comprises a limiting table (3231), the limiting table (3231) is arranged on the side wall of the connecting pipe (321), an elastic clamping ring (3232) is arranged on the limiting table (3231), and the elastic clamping ring (3232) is sleeved on the outer wall of the connecting pipe (321).

9. The positive pressure pneumatic conveying system for granular dust according to claim 1, wherein the sliding assembly (34) comprises a sliding frame (341), the bottom of the sliding frame (341) penetrates through a long through hole (342) to be connected with a sealing plate (343), the long through hole (342) is formed in the side wall of the straight pipe (31), and a leak hole (3431) is formed in the sealing plate (343).

10. The positive-pressure pneumatic conveying system for particle dust of claim 1, wherein the sealing assembly (35) comprises a sleeve (351) and a connecting rod (352), the bottom of the sleeve (351) is connected with the side wall of the straight pipe (31) in a penetrating manner, the connecting rod (352) penetrates through the top of the sleeve (351), extends to the inside and is connected with a sealing ball (353), a clamping table (354) is arranged on the outer wall of the connecting rod (352), a spring (355) is arranged on the clamping table (354), and the spring (355) is sleeved on the outer wall of the connecting rod (352).