Mixing device at finished product chute
By adopting a combined design of a stirring shaft and cooling system in the cement mixing device, the problems of excessive temperature of the traditional mixer and bonded materials on the inner wall are solved, and more uniform mixing and efficient cooling are achieved, improving cement quality and equipment efficiency.
Patent Information
- Application Number
- CN202421512447.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The internal temperature of the traditional pneumatic and mechanical composite mixer is too high, which affects the cement quality, and the inner wall of the mixer is prone to bonding materials to increase pneumatic conveying power consumption.
A mixing device at the finished chute is designed, using a stirring shaft to drive the mixing material of the stirring blades, and supply air lifting force through the air pump. Combined with the cooling system, heat exchange and cooling are carried out through the cooling pipe and the air-conditioning nozzle, and the scraping mechanism cleans up the dust on the inner wall.
It realizes more uniform material mixing, efficient cooling and cooling, prevents the inner wall from bonding materials, reduces pneumatic transmission power consumption, and improves cement quality.
Smart Images
Figure CN222777987U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cement mixing equipment, in particular to a mixing device at a finished product chute. Background Art
[0002] In the cement final powder process, the clinker and gypsum need to be ground together to the specified index, and the mixed materials such as slag or fly ash need to be ground separately to the specified index. Then, according to the index requirements of cement, the two are mixed in a certain proportion through a mixing device to form finished cement. In this way, the purpose of flexible production, reduced energy consumption, and reduced clinker consumption can be achieved. However, it should be noted that "proportion and mixing" are the key to this process, that is, in addition to metering equipment, mixing equipment is a key link.
[0003] At present, when mixing cement with a pneumatic and mechanical composite mixer, it is found that the temperature inside the mixing box continues to rise, resulting in different mixing temperatures for different batches of cement, affecting the quality of the cement. In addition, the inner wall of the mixing box is prone to adhesion of materials, increasing the power consumption of pneumatic conveying. Utility Model Content
[0004] The utility model provides a mixing device at a finished product chute, which solves the problems that the internal temperature of a traditional pneumatic and mechanical composite mixer is too high, affecting cement quality, and the inner wall of the mixer is easy to absorb materials and increase the power consumption of pneumatic conveying.
[0005] The utility model provides a mixing device at a finished product chute, comprising a mixing box, a side wall at one end of the mixing box is provided with a feeding port, a side wall at the other end is provided with a discharging port, an observation window is provided at the top of one end of the mixing box, two stirring shafts are provided in the mixing box, a plurality of stirring blades are provided on each stirring shaft, two ends of each stirring shaft are respectively rotatably connected with the two side walls of the mixing box, one end of each stirring shaft is driven to rotate by a driving mechanism provided on the mixing box, a filter plate is provided at the bottom of the mixing box, a plurality of air boxes are provided below the filter plate, each air box is connected with an air pump through an air pipe, a plurality of slag discharging ports are provided on one side of the filter plate, a cooling box is provided at the top of the mixing box, a horizontal mounting plate is provided in the cooling box, a hydraulic cylinder for driving the mounting plate to move up and down is provided at the top of the mixing box, a plurality of vertical cooling pipes are provided in an array at the bottom of the mounting plate, an upper end of each cooling pipe is open and a lower end is closed, an upper end of the cooling pipe is connected and communicated with an air inlet hole correspondingly provided on the mounting plate, a guide hole is correspondingly provided on the mixing box bottom plate below each cooling pipe, and the cooling pipe is penetrated in the guide hole for vertical guiding cooperation.
[0006] Furthermore, an annular groove is arranged on the inner wall of each guide hole, and an O-ring is arranged in the annular groove.
[0007] Furthermore, the stirring shaft is a hollow shaft, one end of which extends to the outside of the mixing box and is connected to the cooling fan through a gas rotary joint and a gas delivery pipe.
[0008] Furthermore, an annular cooling air pipe is coaxially sleeved in the middle of the stirring shaft, and the annular cooling air pipe is connected to the hollow inner cavity of the stirring shaft through a plurality of radially arranged bronchial tubes. A plurality of gas nozzles are arranged on the side wall of the annular cooling air pipe along the circumferential direction, and the gas injection direction of the gas nozzle is opposite to the material conveying direction in the mixing box.
[0009] Furthermore, two scraping mechanisms are arranged on the two side walls inside the mixing box, each scraping mechanism includes a first scraper and an electric push rod, the first scraper is horizontally arranged in the mixing box, and two electric push rods are arranged at both ends of the first scraper to drive the first scraper to move up and down on the inner wall of the mixing box.
[0010] Furthermore, a support rod is radially arranged on the rear end side wall of the stirring shaft, a guide tube parallel to the stirring shaft is arranged at the outer end of the support rod, a guide rod is passed through the guide tube, one end of the guide rod is elastically connected to the guide tube by a spring, and a second scraper vertically connected to the guide tube is arranged at the other end.
[0011] It can be seen from the above technical solutions that the utility model provides a mixing device at a finished product chute.
[0012] Compared with the prior art, the beneficial effects of the utility model are:
[0013] 1. The driving mechanism drives the stirring shaft to drive the stirring blades to mix the materials inside the mixing box. The air pump supplies air to apply airflow lifting force to the mixed materials. With the mechanical stirring method of the stirring blades, the mixed materials are more uniform. The cooling gas is provided to the cooling pipe to cool the powder passing through the top of the mixing box by heat exchange. The heat exchange efficiency is high and the cooling effect is good.
[0014] 2. The hollow inner cavity of the stirring shaft is connected with the annular cold air pipe. The cooling gas in the hollow inner cavity of the stirring shaft enters the annular cold air pipe, and then is ejected in the opposite direction of the material conveying through the gas nozzle. The cooling gas can fully exchange heat with the powder conveyed in the middle of the mixing box to cool down;
[0015] 3. The first scraper is driven by the electric push rod to clean the dust adsorbed on the inner wall of the mixing box to prevent the dust from gathering and agglomerating on the inner wall of the mixing box.
[0016] 4. The stirring shaft drives the second scraper to make circular motion to scrape off the powder on the rear wall of the mixing box, which can prevent the increase of pneumatic conveying power and prevent different batches of cement from being retained and mixed to affect the quality of cement. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solution of the utility model, the following is a brief introduction to the drawings required for use in the implementation cases. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0018] Figure 1 It is a schematic cross-sectional view of the overall structure of a mixing device at a finished product chute proposed by the utility model;
[0019] Figure 2 This is a schematic diagram of the internal structure of a cooling box of a mixing device at a finished product chute proposed by the utility model;
[0020] Figure 3 For the utility model Figure 1 A schematic diagram of the local enlarged structure at position Ⅰ;
[0021] Figure 4 For the utility model Figure 1 Schematic diagram of the local enlarged structure of position II;
[0022] Figure 5 For the utility model Figure 1 A schematic diagram of the partially enlarged structure of position III;
[0023] Figure 6 The utility model is a schematic diagram of the installation and use structure of a mixing device at a finished product chute.
[0024] In the figure:
[0025] 1-mixing box; 11-feeding port; 12-discharging port; 13-observation window; 15-slag discharge port; 16-guide hole; 161-annular groove; 162-O-type sealing ring;
[0026] 2-stirring shaft; 20-stirring blade; 21-gas rotary joint; 22-annular cold air pipe; 23-bronchial pipe; 24-gas nozzle; 201-support rod; 202-guide pipe; 203-guide rod; 204-spring; 205-second scraper;
[0027] 3- Driving mechanism;
[0028] 4- Filter plate;
[0029] 5- Gas box;
[0030] 6-cooling box; 61-mounting plate; 62-hydraulic cylinder; 63-cooling pipe; 611-air inlet;
[0031] 7-scraping mechanism; 71-first scraper; 72-electric push rod;
[0032] 8- chute; 81- spiral gate; 82- feed pipe; 83- discharge pipe. DETAILED DESCRIPTION
[0033] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.
[0034] Embodiment 1:
[0035] See also Figure 1-6 A mixing device at a finished product chute comprises a mixing box 1, a feeding port 11 is arranged on the front side wall of the mixing box 1, a discharging port 12 is arranged on the rear side wall, an observation window 13 is arranged on the top of one end of the mixing box 1, and the observation window 13 has good light transmittance, so that the mixing situation inside the mixing box 1 can be observed, two horizontal and mutually parallel stirring shafts 2 are arranged in the mixing box 1, and the two ends of each stirring shaft 2 are respectively supported by bearing seats arranged on the two side walls of the mixing box 1 for rotation, and a plurality of stirring blades 20 are arranged on each stirring shaft 2, and one end of each stirring shaft 2 passes through the mixing box 1 The driving mechanism 3 is set to drive the rotation, a filter plate 4 is set at the bottom of the mixing box 1, and multiple air boxes 5 are set below the filter plate 4. The upper end of each air box 5 is set to be open and connected to the air pump through an air pipe for air supply. Multiple slag discharge ports 15 are set on one side of the filter plate 4. The slag discharge port 15 is used to discharge the larger slag on the filter plate 4. A cooling box 6 is set on the top of the mixing box 1. A cold air intake interface is set on the top of the cooling box 6. The cold air intake interface is connected to the air cooler through a cold pipe. A horizontal mounting plate 61 is set in the cooling box 6. The top of the mixing box 6 is provided with a mounting plate 61 for driving the mounting plate 61. A hydraulic cylinder 62 moves downward, and a plurality of vertical cooling pipes 63 are arranged in an array at the bottom of the mounting plate 61. The upper end of each cooling pipe 63 is open and the lower end is closed. The upper end of the cooling pipe 63 is connected to the air inlet 611 correspondingly arranged on the mounting plate 61. A guide hole 16 is correspondingly arranged on the bottom plate of the mixing box 1 below each cooling pipe 63. The cooling pipe 63 is inserted into the guide hole 16 for vertical guidance. The cement powder enters the mixing box 1 from the feed port 11 through pneumatic conveying, and the driving mechanism 3 drives the stirring shaft 2 to drive the stirring blade 20 to move the material inside the mixing box 1. Mixing is carried out by supplying air to the air box 5 through an air pump. The gas in the air box 5 passes through the filter plate 4 upward, exerting airflow lifting force on the mixed materials. With the mechanical stirring method of the stirring blade 20, the mixed materials are more uniform. Low-temperature cold air is supplied to the cooling box 6, and the low-temperature gas enters the cooling pipe 63 through the air inlet 611. The hydraulic cylinder 62 is controlled by the controller to drive the mounting plate 61 to move, so that each cooling pipe 63 is guided by the guide hole 16 and extends out of the cooling box 6, so that the powder flowing through the top of the mixing box 1 is cooled by heat exchange, and the heat exchange efficiency is high.
[0036] In this embodiment, see Figure 2An annular groove 161 is provided on the inner wall of each guide hole 16, and an O-ring 162 is provided in the annular groove 161. By providing the O-ring 162, dust in the mixing box 1 can be prevented from entering the cooling box 6. At the same time, when dust adheres to the surface of the cooling pipe 63, the material adhered to the surface of the cooling pipe 63 can be quickly cleaned through the O-ring 162 during the guiding movement through the guide hole 16, thereby ensuring the cooling efficiency of the cooling pipe 63.
[0037] In this embodiment, see Figure 1 The stirring shaft 2 is a hollow shaft, one end of which extends to the outside of the mixing box 1 and is connected to the cooling fan through a gas rotary joint 21 and a gas delivery pipe. The gas rotary joint 21 is an existing commercially available equipment. During the rotation of the stirring shaft 2, cooling gas can still be provided to the hollow shaft cavity of the stirring shaft 2, and heat exchange is performed with the mixed powder in the mixing box 1 through the outer wall of the stirring shaft 2.
[0038] In this embodiment, see Figure 1 , 3 A ring-shaped cooling air pipe 22 is coaxially sleeved in the middle of the stirring shaft 2. The ring-shaped cooling air pipe 22 is connected to the hollow inner cavity of the stirring shaft 2 through a plurality of radially arranged bronchial tubes 23. A plurality of gas nozzles 24 are arranged on the side wall of the ring-shaped cooling air pipe 22 in a circumferential direction. The gas injection direction of the gas nozzle 24 is opposite to the material conveying direction in the mixing box 1. The cooling gas in the hollow inner cavity of the stirring shaft 2 enters the ring-shaped cooling air pipe 22, and then is ejected in the opposite direction of the material conveying through the gas nozzle 24. The cooling gas can fully exchange heat with the powder conveyed in the middle of the mixing box 1 to cool it down.
[0039] In this embodiment, see Figure 1 The driving mechanism 3 is composed of a driving motor and a reducer. The output end of the driving motor is connected to the input end of the reducer, and the output end of the reducer is connected to the stirring shaft 2. The driving motor and the reducer are supported by a support arranged on the side wall of the mixing box 1 so that the stirring shaft 2 can obtain stable conveying power and rotation speed.
[0040] In this embodiment, see Figure 1 , 4 Two scraping mechanisms 7 are arranged on the inner and outer side walls of the mixing box 1. Each scraping mechanism 7 includes a first scraper 71 and an electric push rod 72. The first scraper 71 is horizontally arranged in the mixing box 1. Two electric push rods 72 are arranged at both ends of the first scraper 71 to drive the first scraper 71 to move up and down on the inner side wall of the mixing box 1. The electric push rod 72 drives the first scraper 71 to clean the dust adsorbed on the inner side wall of the mixing box 1 to prevent the dust from gathering and agglomerating on the inner side wall of the mixing box 1.
[0041] In this embodiment, see Figure 1 , 5A support rod 201 is radially arranged on the rear end side wall of the stirring shaft 2. The support rod 201 is arranged radially along the stirring shaft 2. The inner end of the support rod 201 is welded and fixedly connected to the stirring shaft 2. A guide tube 202 parallel to the stirring shaft 2 is arranged at the outer end of the support rod 201. A guide rod 203 is inserted into the guide tube 202. One end of the guide rod 203 is elastically connected to the guide tube 202 by a spring 204, and the other end is provided with a second scraper 205 vertically connected thereto. The function of the spring 204 is to make the second scraper 205 generate a micro pressure on the inner wall of the mixing box 1, and also to prevent the second scraper 205 from causing excessive wear. During the rotation of the stirring shaft 2, the support rod 201 is driven to make a circular motion, and the support rod 201 drives the guide tube 202, the guide rod 203, and the second scraper 205 to make a circular motion around the stirring shaft 2. The scraping part of the second scraper 20 contacts the inner side walls of the mixing box 1. During the rotation, the powder on the rear wall of the mixing box 1 can be scraped off. Since the rear wall of the mixing box 1 is directly opposite to the conveying airflow of the powder, the material is easily adhered to, and it can be cleaned up in time by the second scraper 20, which can prevent the increase of the pneumatic conveying power and prevent different batches of cement from being retained and mixed to affect the quality of the cement.
[0042] It can be seen from the above technical solution that when using, refer to Figure 1-6First, install the equipment directly on the floor of the plane where the finished product chute 8 is located, place the feed port 11 and the discharge port 12 on one side of the mixer 1 close to one side of the chute, and open the side of the chute. The high-end opening is connected to the inlet of the mixer 1, and the low-end opening is connected to the outlet of the mixer 1. The chute 8 remains unchanged, and only a spiral gate 81 is installed in the middle of the discharge port 11 and the feed port 12 to block the original chute 8. The slag powder is measured and sent to the feed port 11 of the mixer 1 through the conveying equipment. When the preparation is in place, the connection work is completed by stopping production for one shift. The cement powder enters the mixing box 1 from the feed port 11 through pneumatic conveying, and the driving mechanism 3 drives the stirring shaft 2 to drive the stirring blades 20 to mix the materials inside the mixing box 1. The air pump is used to supply air to the air box 5. The gas in the air box 5 passes through the filter plate 4 upward, exerting airflow lifting force on the mixed materials. With the mechanical stirring method of the stirring blades 20, the mixed materials are more uniform. By supplying low-temperature cold air to the cooling box 6, the low-temperature gas enters the cooling pipe 63 through the air inlet 611, and the hydraulic cylinder 62 is controlled by the controller to drive the mounting plate 61 to move, so that each cooling pipe 63 is guided through the guide hole 16. The first scraper 71 is driven by the electric push rod 72 to clean the dust adsorbed on the inner wall of the mixing box 1 to prevent the dust from gathering and agglomerating on the inner wall of the mixing box 1. The cooling gas in the hollow inner cavity of the stirring shaft 2 enters the annular cooling air pipe 22, and then is ejected in the opposite direction of the material conveying through the gas nozzle 24. The cooling gas can fully exchange heat and cool the powder conveyed in the middle of the mixing box 1. During the rotation of the stirring shaft 2, the support rod 201 is driven to make a circular motion. The support rod 201 drives the guide tube 202, the guide rod 203, and the second scraper 205 to make a circular motion around the stirring shaft 2. The scraping part of the second scraper 20 contacts the inner side walls of the mixing box 1. During the rotation, the powder on the rear side wall of the mixing box 1 can be scraped off.
[0043] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the utility model disclosed herein. The present invention is intended to cover any variation, use or adaptation of the present invention, which follows the general principles of the present invention and includes common knowledge or customary technical means in the art that are not disclosed in the present invention. The specification and examples are to be regarded as exemplary only, and the true scope of the present invention is indicated by the claims.
[0044] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present invention do not constitute a limitation on the scope of protection of the present invention.
Claims
1. A mixing device at a finished product chute, characterized in that: The invention comprises a mixing box (1), wherein a feeding port (11) is arranged on a side wall at one end of the mixing box (1), and a discharging port (12) is arranged on a side wall at the other end of the mixing box (1); an observation window (13) is arranged on the top of the mixing box (1); two stirring shafts (2) are arranged in the mixing box (1); the two ends of each stirring shaft (2) are respectively rotatably connected to the two side walls of the mixing box (1); a plurality of stirring blades (20) are arranged on each stirring shaft (2); one end of each stirring shaft (2) is driven to rotate by a driving mechanism (3) arranged on the mixing box (1); a filter plate (4) is arranged at the bottom of the mixing box (1); a plurality of air boxes (5) are arranged below the filter plate (4); the upper end of each air box (5) is open and connected to an air pump through an air pipe for air supply; the filter plate (4) ) is provided with a plurality of slag discharge ports (15) on one side, a cooling box (6) is provided at the top of the mixing box (1), a horizontal mounting plate (61) is provided in the cooling box (6), a hydraulic cylinder (62) for driving the mounting plate (61) to move up and down is provided at the top of the mixing box (1), a plurality of vertical cooling pipes (63) are provided in an array at the bottom of the mounting plate (61), each of the cooling pipes (63) has an open upper end and a closed lower end, the upper end of the cooling pipe (63) is connected to an air inlet (611) correspondingly provided on the mounting plate (61), a guide hole (16) is correspondingly provided on the bottom plate of the mixing box (1) below each of the cooling pipes (63), and the cooling pipe (63) is passed through the guide hole (16) for vertical guidance.
2. A mixing device at a finished product chute according to claim 1, characterized in that: An annular groove (161) is provided on the inner wall of each guide hole (16), and an O-type sealing ring (162) is provided in the annular groove (161).
3. A mixing device at a finished product chute according to claim 1, characterized in that: The stirring shaft (2) is a hollow shaft, one end of which extends to the outside of the mixing box (1) and is connected to the cooling fan via a gas rotary joint (21) and a gas delivery pipe.
4. A mixing device at a finished product chute according to claim 1, characterized in that: The stirring shaft (2) is coaxially sleeved with an annular cooling air pipe (22), the annular cooling air pipe (22) is connected to the hollow inner cavity of the stirring shaft (2) via a plurality of radially arranged bronchial tubes (23), and a plurality of gas nozzles (24) are arranged on the side wall of the annular cooling air pipe (22) along the circumferential direction.
5. A mixing device at a finished product chute according to claim 1, characterized in that: Two scraping mechanisms (7) are arranged on the inner side walls of the mixing box (1), and each scraping mechanism (7) comprises a first scraper (71) and an electric push rod (72). The first scraper (71) is arranged in the mixing box (1), and two electric push rods (72) are arranged at both ends of the first scraper (71).
6. A mixing device at a finished product chute according to claim 1, characterized in that: A support rod (201) is radially arranged on the rear end side wall of the stirring shaft (2); a guide tube (202) parallel to the stirring shaft (2) is arranged at the outer end of the support rod (201); a guide rod (203) is inserted into the guide tube (202); one end of the guide rod (203) is elastically connected to the guide tube (202) via a spring (204); and a second scraper (205) is arranged at the other end.