A hot air circulation device for drying and pretreatment of fiber-reinforced concrete raw materials

Abstract

This utility model discloses a hot air circulation device for the pre-treatment of fiber concrete raw materials drying, relating to the field of fiber concrete technology. Addressing the problems in the prior art where fiber bundles easily clog the screen plate, leading to difficulties in subsequent dispersion and feeding, resulting in low practicality, and the lack of drying of the fiber bundles causing them to re-adhere under moisture, resulting in poor dispersion, the present invention proposes the following solution: It includes a base plate and two mounting plates. A drying mechanism is provided above the base plate. The drying mechanism includes a heat insulation cylinder, a drying cylinder fixed inside the heat insulation cylinder, several PTC heaters respectively bonded to the lower outer wall of the drying cylinder, a transmission sleeve welded to one side of the outer wall of the heat insulation cylinder, a driven gear, and a fixed sleeve. This utility model can heat the fiber bundles, promoting the dispersion of fiber bundles that have adhered due to moisture, improving the dispersion effect, facilitating the feeding of fiber bundles, preventing fiber bundle clogging, and improving practicality.

Description

Technical Field

[0001] This utility model relates to the field of fiber concrete technology, and in particular to a hot air circulation device for drying and pretreatment of fiber concrete raw materials. Background Technology

[0002] Fiber-reinforced concrete is a general term for composite materials composed of fibers and cementitious materials (cement stone, mortar, or concrete). The main disadvantages of cement stone, mortar, and concrete are: low tensile strength, small ultimate elongation, and brittleness. Adding fibers with high tensile strength, large ultimate elongation, and good alkali resistance can overcome these disadvantages. In the production process of fiber-reinforced concrete, the fibers added to the concrete need to be dispersed.

[0003] A search revealed a Chinese patent (application number "202320639653.9") disclosing a "fiber dispersion device for fiber-reinforced concrete." This dispersion device includes a housing, with a splitting box fixedly connected and connected to the center of the top surface of the housing. A feeding hopper is fixedly connected and connected to the top surface of the splitting box. A vibration assembly is slidably connected inside the housing. The vibration assembly includes a frame, with a cleaning assembly disposed between the inner walls of the frame facing each other. A sieve plate is fixedly connected to the bottom surface of the frame. Support plates are fixedly connected to the two outer walls of the frame opposite to the sieve plate, and the support plates are slidably connected to the housing. A stirring assembly is disposed below the sieve plate. Inclined blocks are fixedly connected to the lower part of the inner wall of the housing, with two of the inclined blocks positioned below the sieve plate. A discharge pipe is fixedly connected to the lowest point of each of the two inclined blocks, and the discharge pipe is fixedly connected and connected to the bottom of the housing. However, the above dispersion device has the following problems during use: 1. When fibers pass through the sieve plate, the fiber bundles are prone to clogging the sieve plate, which makes it difficult to disperse and feed the material later, resulting in low practicality; 2. The fiber bundles were not dried during dispersion, causing them to re-adhere under the influence of moisture, resulting in poor dispersion. Utility Model Content

[0004] This utility model provides a hot air circulation device for drying and pretreatment of fiber concrete raw materials, which solves the problems of the dispersion device proposed in the prior art, where fiber bundles easily clog the screen plate when dispersing fibers, resulting in inconvenience for subsequent dispersion and feeding, low practicality, and the failure to dry the fiber bundles, causing the fiber bundles to re-adhere under the action of moisture, resulting in poor dispersion effect.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A hot air circulation device for drying and pretreatment of fiber-reinforced concrete raw materials includes a base plate and two mounting plates. A drying mechanism is provided above the base plate. The drying mechanism includes a heat insulation cylinder, a drying cylinder fixed inside the heat insulation cylinder, several PTC heaters respectively bonded to the lower outer wall of the drying cylinder, a transmission sleeve welded to one side outer wall of the heat insulation cylinder, a driven gear connected to the outer wall of the transmission sleeve by a pin, and a fixed sleeve welded to one side outer wall of the heat insulation cylinder. A feeding assembly is provided on the drying cylinder. The feeding assembly includes a feeding cylinder, a connecting frame fixed to the inner wall of the bottom of the feeding cylinder, and a component bolted to one side outer wall of the feeding cylinder. The drying cylinder includes a feeding motor and an auger connected to one end of the output shaft of the feeding motor via a coupling. A stirring mechanism is provided inside the drying cylinder. The stirring mechanism includes a stirring motor, a mounting shaft connected to one end of the output shaft of the stirring motor via a coupling, and a stirring frame connected to the outer wall of the mounting shaft via a pin. A rotating mechanism is provided on one side of one of the mounting plates. The rotating mechanism includes a rotating motor, a rotating shaft connected to one end of the output shaft of the rotating motor via a coupling, and a driving gear meshing with a driven gear. A recovery assembly is provided on one side of the heat insulation cylinder. The recovery assembly includes a recovery box and several zeolite molecular sieves that are slidably fitted inside the recovery box.

[0006] Preferably, the two mounting plates are welded to the outer walls of the top two sides of the base plate, and two reinforcing plates are bolted to one side of the outer wall of each mounting plate, and the four reinforcing plates are bolted to the outer wall of the top of the base plate.

[0007] Preferably, the transmission sleeve passes through and is connected to the outer wall of one of the mounting plates via a bearing, and the fixing sleeve passes through and is connected to the outer wall of the other mounting plate via a bearing.

[0008] The above method uses a PTC heater to heat the drying cylinder, thereby raising the temperature inside the cylinder and heating the fibers inside, preventing moisture on the outside of the fiber bundles from causing them to stick together.

[0009] Preferably, a hopper is fixed on the inner wall of the top end of the feeding cylinder, a connecting frame is fixed on the inner wall of the bottom end of the feeding cylinder, and the connecting frame passes through the heat insulation cylinder and is fixed on the inner wall of the drying cylinder. One end of the auger passes through and is connected to the outer wall of one end of the feeding cylinder through a bearing.

[0010] Preferably, a mounting bracket is welded to one side of the outer wall of the mounting plate, and the stirring motor is bolted to one side of the outer wall of the mounting bracket. The two ends of the mounting shaft are respectively connected to the transmission sleeve and the fixed sleeve through bearings.

[0011] The above method involves feeding fibers into the feeding cylinder via a hopper. The output shaft of the feeding motor drives the auger to rotate and feed the fibers. The fibers fall into the tumbling frame, and the output shaft of the tumbling motor drives the mounting shaft and the tumbling frame to rotate. The tumbling frame tumbles and disperses the fibers in the drying cylinder. At the same time, the fibers tumble up and down in the tumbling frame, allowing the fibers to fully contact the heat.

[0012] Preferably, a fixing frame is welded to one side of the outer wall of the mounting plate, and the rotary motor is bolted to the outer wall of one side of the mounting plate. One end of the rotating shaft passes through and is connected to the outer wall of the mounting plate through a bearing, and the drive gear is connected to the outer wall of the rotating shaft through a pin.

[0013] The above scheme uses the output shaft of a rotary motor to drive the drive gear to rotate, which in turn drives the driven gear, transmission sleeve, and heat insulation cylinder to rotate, thereby driving the feeding cylinder and hopper to rotate. This causes the hopper to rotate 180 degrees, so that the hopper opening faces downward. At this time, the output shaft of the feeding motor drives the auger to rotate, causing the fiber to be fed into the hopper.

[0014] Preferably, an installation block is bolted to one outer wall of the heat insulation cylinder, and the recovery box is bolted to one outer wall of the installation block. A box cover is bolted to the top outer wall of the recovery box, and several zeolite molecular sieves are bolted to the bottom outer wall of the box cover. A recovery pipe is fixed to the upper inner wall of one side of the recovery box, and one end of the recovery pipe is connected to the drying cylinder. A circulation pipe is fixed to the lower inner wall of one side of the recovery box, and one end of the circulation pipe is connected to the drying cylinder.

[0015] The above scheme involves transporting the hot air containing moisture from the top of the drying cylinder to the recovery box via a recovery pipe. The zeolite molecular sieve adsorbs the moisture in the hot air, and then the dried hot air re-enters the drying cylinder through the circulation pipe to dry the fibers.

[0016] The beneficial effects of this utility model are as follows: 1. The PTC heater heats the drying cylinder, raising the temperature inside and heating the fibers within. This prevents moisture on the outside of the fiber bundles from causing them to stick together. The recovery pipe transports the hot air containing moisture from the top of the drying cylinder to the recovery box. The zeolite molecular sieve adsorbs the moisture in the hot air. Subsequently, the dry hot air re-enters the drying cylinder through the circulation pipe to dry the fibers. This heating of the fiber bundles promotes the dispersion of fiber bundles that have stuck together due to moisture, thus improving the dispersion effect.

[0017] 2. The hopper conveys the fibers into the feeding cylinder. The output shaft of the feeding motor drives the auger to rotate and convey the fibers. The output shaft of the rotary motor drives the drive gear to rotate, which in turn drives the driven gear, transmission sleeve and heat insulation cylinder to rotate, thereby driving the feeding cylinder and hopper to rotate. This causes the hopper to rotate 180 degrees so that the hopper opening faces downward. At this time, the output shaft of the feeding motor drives the auger to rotate, allowing the fibers to be discharged at the hopper. This facilitates the discharge of fiber bundles, prevents fiber bundle blockage, and improves practicality.

[0018] In summary, this invention can heat the fiber bundles, causing the fiber bundles that have become stuck due to moisture to disperse, thus improving the dispersion effect. It also allows for convenient feeding of the fiber bundles, prevents fiber bundle blockage, and improves practicality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall main structure of a hot air circulation device for drying and pretreatment of fiber concrete raw materials proposed in this utility model.

[0020] Figure 2 This is a side view of the overall structure of a hot air circulation device for drying and pretreatment of fiber concrete raw materials proposed in this utility model.

[0021] Figure 3 This is a side view of the drying mechanism of a hot air circulation device for drying and pretreatment of fiber concrete raw materials proposed in this utility model.

[0022] Figure 4 This is a front view cross-sectional structural diagram of the drying mechanism of a hot air circulation device for drying and pretreatment of fiber concrete raw materials proposed in this utility model.

[0023] Figure 5 This is a front view cross-sectional structural diagram of the feeding component of a hot air circulation device for drying and pretreatment of fiber concrete raw materials proposed in this utility model.

[0024] Figure 6 This is a schematic diagram of the main structure of the stirring mechanism of a hot air circulation device for drying and pretreatment of fiber concrete raw materials proposed in this utility model.

[0025] Figure 7 This is a front view schematic diagram of the rotating mechanism of a hot air circulation device for drying and pretreatment of fiber concrete raw materials proposed in this utility model.

[0026] Figure 8 This is a schematic diagram of the main structure of the recovery component of a hot air circulation device for drying and pretreatment of fiber concrete raw materials proposed in this utility model.

[0027] In the diagram: 1. Base plate; 2. Mounting plate; 3. Drying mechanism; 301. Insulation cylinder; 302. Drying cylinder; 303. PTC heater; 304. Transmission sleeve; 305. Driven gear; 306. Fixed sleeve; 4. Feeding assembly; 401. Feeding cylinder; 402. Hopper; 403. Connecting frame; 404. Feeding motor; 405. Screwdriver; 5. Tumbling mechanism; 501. Mounting frame; 502. Tumbling motor; 503. Mounting shaft; 504. Tumbling frame; 6. Rotation mechanism; 601. Fixed frame; 602. Rotation motor; 603. Rotation shaft; 604. Drive gear; 7. Recycling assembly; 701. Mounting block; 702. Recycling box; 703. Box cover; 704. Zeolite molecular sieve; 705. Recycling pipe; 706. Circulation pipe. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] Example 1, referring to Figure 1-4 and Figure 8 A hot air circulation device for drying and pretreatment of fiber-reinforced concrete raw materials includes a base plate 1 and two mounting plates 2 respectively welded to the outer walls of the top two sides of the base plate 1. The two mounting plates 2 are connected to the base plate 1 by two reinforcing plates. A drying mechanism 3 is provided above the base plate 1. The drying mechanism 3 includes a heat insulation cylinder 301, a drying cylinder 302 fixed inside the heat insulation cylinder 301, several PTC heaters 303 respectively bonded to the lower outer wall of the drying cylinder 302, a transmission sleeve 304 welded to one side of the outer wall of the heat insulation cylinder 301, a driven gear 305 connected to the outer wall of the transmission sleeve 304 by a pin, and a fixed sleeve 306 welded to one side of the outer wall of the heat insulation cylinder 301. The transmission sleeve 304 passes through and is connected to the outer wall of one of the mounting plates 2 by a bearing. The fixed sleeve 306 passes through and is connected to the outer wall of one of the mounting plates 2 by a shaft. A heat insulation cylinder 301 is connected to the outer wall of another mounting plate 2. A recovery component 7 is provided on one side of the heat insulation cylinder 301. The recovery component 7 includes a recovery box 702 and several zeolite molecular sieves 704 that are slidably sleeved in the recovery box 702. A mounting block 701 is bolted to the outer wall of one side of the heat insulation cylinder 301. The recovery box 702 is bolted to the outer wall of the top of the recovery box 702. A box cover 703 is bolted to the outer wall of the top of the box cover 702. Several zeolite molecular sieves 704 are bolted to the outer wall of the bottom of the box cover 703. A recovery pipe 705 is fixed on the upper inner wall of one side of the recovery box 702. One end of the recovery pipe 705 is connected to the drying cylinder 302. A circulation pipe 706 is fixed on the lower inner wall of one side of the recovery box 702. One end of the circulation pipe 706 is connected to the drying cylinder 302.

[0030] Example 2, refer to Figure 5-7 A hot air circulation device for drying and pretreatment of fiber concrete raw materials further includes a feeding assembly 4. The feeding assembly 4 includes a feeding cylinder 401, a connecting frame 403 fixed to the inner wall of the bottom of the feeding cylinder 401, a feeding motor 404 bolted to the outer wall of one side of the feeding cylinder 401, and an auger 405 connected to one end of the output shaft of the feeding motor 404 via a coupling. A hopper 402 is fixed to the inner wall of the top end of the feeding cylinder 401, and a connecting frame 403 is fixed to the inner wall of the bottom of the feeding cylinder 401. The connecting frame 403 passes through the heat insulation cylinder 301 and is fixed to the inner wall of the drying cylinder 302. One end of the auger 405 passes through and is connected to the outer wall of one end of the feeding cylinder 401 via a bearing. A stirring mechanism 5 is provided inside the drying cylinder 302. The stirring mechanism 5 includes a stirring motor 502 and a mounting bracket connected to one end of the output shaft of the stirring motor 502 via a coupling. The mounting plate 2 has a shaft 503 and a stirring frame 504 connected to the outer wall of the mounting shaft 503 by a pin. A mounting frame 501 is welded to one side of the outer wall of the mounting plate 2. A stirring motor 502 is bolted to one side of the outer wall of the mounting frame 501. The two ends of the mounting shaft 503 are respectively connected to the transmission sleeve 304 and the fixed sleeve 306 by bearings. One side of the mounting plate 2 is provided with a rotating mechanism 6. The rotating mechanism 6 includes a rotating motor 602, a rotating shaft 603 connected to one end of the output shaft of the rotating motor 602 by a coupling, and a driving gear 604 meshing with the driven gear 305. A fixed frame 601 is welded to one side of the outer wall of the mounting plate 2. The rotating motor 602 is bolted to one side of the outer wall of the mounting plate 2. One end of the rotating shaft 603 passes through and is connected to the outer wall of the mounting plate 2 by a bearing. The driving gear 604 is connected to the outer wall of the rotating shaft 603 by a pin.

[0031] Working principle: The hopper 402 conveys fibers into the feeding cylinder 401. The output shaft of the feeding motor 404 drives the auger 405 to rotate and convey the fibers. The fibers fall into the stirring frame 504. At the same time, the output shaft of the stirring motor 502 drives the stirring frame 504 to rotate slowly. The PTC heater 303 operates to heat the drying cylinder 302. The output shaft of the stirring motor 502 drives the mounting shaft 503 and the stirring frame 504 to rotate. The stirring frame 504 tumbles and disperses the fibers in the drying cylinder 302. At the same time, the fibers tumble up and down in the stirring frame 504, so that the fibers can fully contact the heat and avoid moisture causing the fiber bundles to stick together. The recovery pipe 705 returns the drying cylinder 302 to the dryer. The hot air containing moisture in the upper part of the 02 is transported to the recovery box 702. The zeolite molecular sieve 704 adsorbs the moisture in the hot air. Then, the dry hot air enters the drying cylinder 302 again through the circulation pipe 706 to dry the fiber. The output shaft of the rotary motor 602 drives the drive gear 604 to rotate. The drive gear 604 drives the driven gear 305, the transmission sleeve 304 and the heat insulation cylinder 301 to rotate, which in turn drives the feeding cylinder 401 and the hopper 402 to rotate, so that the hopper 402 rotates 180 degrees and the opening of the hopper 402 faces downward. At this time, the output shaft of the feeding motor 404 drives the auger 405 to rotate, so that the fiber moves to the hopper 402 and is discharged.

[0032] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A hot air circulation device for drying and pretreatment of fiber-reinforced concrete raw materials, comprising a base plate (1) and two mounting plates (2), characterized in that, A drying mechanism (3) is provided above the base plate (1). The drying mechanism (3) includes a heat insulation cylinder (301), a drying cylinder (302) fixed inside the heat insulation cylinder (301), a number of PTC heaters (303) respectively bonded to the lower outer wall of the drying cylinder (302), a transmission sleeve (304) welded to the outer wall of one side of the heat insulation cylinder (301), a driven gear (305) connected to the outer wall of the transmission sleeve (304) by a pin, and a fixed sleeve (306) welded to the outer wall of one side of the heat insulation cylinder (301). The drying cylinder (302) is provided with a feeding assembly (4), which includes a feeding cylinder (401), a connecting frame (403) fixed on the inner wall of the bottom of the feeding cylinder (401), a feeding motor (404) connected to the outer wall of one side of the feeding cylinder (401) by bolts, and an auger (405) connected to one end of the output shaft of the feeding motor (404) by a coupling. The drying cylinder (302) is provided with a stirring mechanism (5), which includes a stirring motor (502), a mounting shaft (503) connected to one end of the output shaft of the stirring motor (502) via a coupling, and a stirring frame (504) connected to the outer wall of the mounting shaft (503) via a pin. One of the mounting plates (2) is provided with a rotating mechanism (6) on one side. The rotating mechanism (6) includes a rotary motor (602), a rotating shaft (603) connected to one end of the output shaft of the rotary motor (602) via a coupling, and a driving gear (604) meshing with the driven gear (305). The heat insulation cylinder (301) is provided with a recycling component (7) on one side. The recycling component (7) includes a recycling box (702) and a number of zeolite molecular sieves (704) that are slidably sleeved in the recycling box (702).

2. The hot air circulation device for drying and pretreatment of fiber-reinforced concrete raw materials according to claim 1, characterized in that, The two mounting plates (2) are respectively welded to the outer walls of the top two sides of the base plate (1), and two reinforcing plates are connected to one side of the outer wall of the two mounting plates (2) by bolts. The four reinforcing plates are respectively connected to the outer wall of the top of the base plate (1) by bolts.

3. The hot air circulation device for drying and pretreatment of fiber-reinforced concrete raw materials according to claim 1, characterized in that, The transmission sleeve (304) passes through and is connected to the outer wall of one of the mounting plates (2) via a bearing, and the fixing sleeve (306) passes through and is connected to the outer wall of the other mounting plate (2) via a bearing.

4. The hot air circulation device for drying and pretreatment of fiber-reinforced concrete raw materials according to claim 1, characterized in that, A hopper (402) is fixedly provided on the inner wall of the top end of the feeding cylinder (401), and a connecting frame (403) is fixedly provided on the inner wall of the bottom of the feeding cylinder (401). The connecting frame (403) passes through the heat insulation cylinder (301) and is fixed on the inner wall of the drying cylinder (302). One end of the auger (405) passes through and is connected to the outer wall of one end of the feeding cylinder (401) through a bearing.

5. A hot air circulation device for drying and pretreatment of fiber-reinforced concrete raw materials according to claim 1, characterized in that, The mounting plate (2) has a mounting bracket (501) welded on one side of the outer wall, and the stirring motor (502) is bolted to the outer wall of the mounting bracket (501). The two ends of the mounting shaft (503) are respectively connected to the transmission sleeve (304) and the fixed sleeve (306) through bearings.

6. A hot air circulation device for drying and pretreatment of fiber-reinforced concrete raw materials according to claim 1, characterized in that, A fixing frame (601) is welded on one side of the outer wall of the mounting plate (2), and the rotating motor (602) is connected to the outer wall of one side of the mounting plate (2) by bolts. One end of the rotating shaft (603) passes through and is connected to the outer wall of the mounting plate (2) by bearing, and the drive gear (604) is connected to the outer wall of the rotating shaft (603) by pin.

7. A hot air circulation device for drying and pretreatment of fiber-reinforced concrete raw materials according to claim 1, characterized in that, An installation block (701) is bolted to one side of the outer wall of the heat insulation cylinder (301), and a recycling box (702) is bolted to one side of the outer wall of the installation block (701). A box cover (703) is bolted to the top outer wall of the recycling box (702), and several zeolite molecular sieves (704) are bolted to the bottom outer wall of the box cover (703). A recycling pipe (705) is fixed on the upper inner wall of one side of the recycling box (702), and one end of the recycling pipe (705) is connected to the drying cylinder (302). A circulation pipe (706) is fixed on the lower inner wall of one side of the recycling box (702), and one end of the circulation pipe (706) is connected to the drying cylinder (302).

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