JPH0531913U - Mixer input scraper device - Google Patents

Abstract

(57) [Summary] [Purpose] Use a powder input port where powder and kneaded material do not adhere and accumulate in the mixer. [Structure] A fixing member 5 having an opening 6 in the powder charging port 3.
The annular member 7 having the gear portion 8 formed therein is horizontally rotatably fitted to the opening portion 6, the first scraper 9 is fixed to the annular member 7, and the gear portion 8 meshes with the first scraper 9 to slide horizontally. The rack member 10 is assembled, the case member 13 that covers the annular member 7 and the rack member 10 and has the charging hole 14 is fixed to the fixing member 5, and the second scraper 15 is fixed to the case member 13. An opening / closing gate 16 driven by a cylinder 11 was connected to the top of the above, and the rack member 10 was connected to the piston rod 12. [Effect] The first and second scrapers scrape off adhering substances, so that they are rarely deposited on the powder charging port. The frequency of cleaning decreases, the operating rate of the mixer increases, and kneading efficiency improves. Since the cylinder is shared, the cost can be reduced and the device can be downsized.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention is a scraper device for preventing a powder or a kneaded material from adhering to and depositing at a powder input port in a mixer for mixing and kneading various powders and a liquid such as water at a predetermined ratio. Regarding

[0002]

[Prior Art]

 There are various types of mixers, but an industrial mixer is disclosed, for example, in Japanese Utility Model Publication No. 61-6090. According to this technique, as shown in FIG. 4, the cement input port 22 and the water supply port 23 are provided on the upper peripheral surface of one end of the mixer main body 21, and the drive shaft 24 is penetrated through the mixer main body 21 from both ends. Screws 26, 26 that generate thrust toward the other end of the mixer body 21 toward the inside are provided, and a blade 25 is provided on the drive shaft 24 between the screws 26, 26. A narrow passage 27 communicating with the inside of the mixer main body 21 is provided in a portion of the upper peripheral surface where the blade 25 is located, and the kneaded mixture that has flowed into the narrow passage 27 is collided to branch left and right while This is a mixer having a structure in which passages 28, 28 for returning the gas are provided on both sides sandwiching 25.

[0003]

[Problems to be solved by the device]

 This mixer is arranged in the order of the cement input port, the water supply port, and the kneading section.After first supplying water, the cement and auxiliary materials (for example, bentonite) are input into the mixer main body where the screw rotates. Since it is sent to the kneading section, water drops are scattered by the rotation of the screw when water is added and cement and bentonite adhere to the cement inlet. Furthermore, the kneaded material is scattered even during kneading, and this is repeated every time it is charged, and it accumulates more and more on the inner wall of the charging port, making it impossible to charge it.As a result of frequent disassembling and cleaning, the operating rate decreases. There is a problem. As a remedy for this problem, a structure has been devised in which water is constantly flowed through the inner wall of the cement inlet when the mixer is operating, but with this method, the ratio of the kneaded material changes and the concentration cannot be kept constant. With this structure, we tried a method of pouring a predetermined amount of water from here to flush the deposits on the inner wall of the inlet.However, since powder and semi-kneaded material accumulate in a short time and the inlet is clogged, it is also troublesome for humans. There are issues that require cleaning. The present invention was devised for the purpose of solving this problem.

[0004]

[Means for Solving the Problems]

 In order to achieve this purpose, a mixer having a cylindrical powder inlet 3 at the top of the mixer body 1 and an opening / closing gate 16 driven by a cylinder 11 above the powder inlet 3 A fixing member 5 having an opening 6 having substantially the same diameter as that of the powder charging port 3 is attached to the powder charging port 3, and an annular member 7 having a gear portion 8 formed on the outer circumference is attached to the opening 6 of the fixing member 5. It is horizontally rotatably fitted and has a first scraper 9 fixed to the inside of the annular member 7 and protruding downward in the vicinity of the inner wall of the powder charging port 3. The rack member 10 to be assembled is assembled, the case member 13 that covers the annular member 7 and the rack member 10 and is provided with the charging hole 14 is fixed to the fixing member 5, and the inner circumference of the annular member 7 is provided inside the case member 13. And project downwards close to the surface The second scraper 15 is fixed, and connecting the opening and closing gate 16 which is driven by the pre-Symbol cylinder 11 above the casing member 13 is obtained by connecting the rack member 10 in the piston rod 12 of the cylinder 11.

[0005]

[Action]

 The cylinder 11 is operated to push out the piston rod 12, open the opening / closing gate 16, and the measured powder is charged from the powder charging port 3 to start kneading in the mixer body 1. Simultaneously with the operation of the piston rod 12, the connected rack member 10 moves forward, and the annular member 7 meshing with the rack member 10 rotates clockwise. When the powder has been charged, the cylinder 11 is activated again to pull in the piston rod 12 and close the opening / closing gate 16. Simultaneously with the operation of the piston rod 12, the rack member 10 connected to the piston rod 12 moves backward, and the annular member 7 meshing with the rack member 10 rotates counterclockwise. By this operation, even if the powder or the semi-kneaded kneaded material adheres to the inner wall of the powder charging port 3, it is scraped off by the rotating first scraper 9. Also, what has adhered to the inner peripheral surface of the annular member 7 is scraped off by the second scraper 15. Even when the kneading operation is performed in this manner, the deposits on the inner periphery of the powder inlet 1 and the annular member 7 are scraped off at each operation of the opening / closing gate 16 so that the deposits are not deposited, and the first scraper 9 and the first scraper 9 Since the 2 scraper 15 has a small surface area, it hardly adheres.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 denotes a mixer main body in which a kneading screw 2 is incorporated. The powder feeding port 3 is vertically fixed to the upper peripheral surface of the mixer body 1 near the side end, and the powder feeding port 3 is formed in a cylindrical shape and communicates with the inside of the mixer body 1. A fixing member 5 provided with an opening 6 having substantially the same diameter as the powder charging port 3 is fixed to the upper end flange 4 of the powder charging port 3. An annular member 7 having a gear portion 8 formed on the outer periphery is fitted into the opening 6 of the fixing member 5 and is horizontally rotatably assembled. The inner wall of the powder charging port 3 is inside the annular member 7. A first scraper 9 that extends downward in close proximity to is fixedly attached and rotates integrally with the annular member 7. The gear portion 8 of the annular member 7 meshes with the rack member 10 that slides in the horizontal direction, and the annular member 7 rotates forward and backward as the rack member 10 moves back and forth (FIG. 3). The case member 13 that covers the annular member 7 and the rack member 10 is provided with a charging hole 14 having substantially the same diameter as the inner diameter of the annular member 7 and is fixed to the fixing member 5. A second scraper 15 is fixed to the case member 13 so as to be close to the inner diameter of the annular member 7 and extend downward. An open / close gate 16 driven by a cylinder 11 (pneumatic or hydraulic) is connected above the case member 13 so as to be opened when powder is charged. Further, the rack member 10 is connected to the piston rod 12 of the cylinder 11 via an arm member 17 so that the rack member 10 moves back and forth simultaneously with the opening / closing gate 16. When the rotation angle of the annular member 7 is small, the first scraper 9 and the second scraper 15 may be provided at two or three locations at equal intervals.

Next, the operation and action of the scraper device having this configuration will be described. When the mixer is operated, the kneading screw 2 is rotated and a predetermined amount of water is charged through the water charging port. Then, the cylinder 11 is operated to push out the piston rod 12, open the open / close gate 16, and the measured powder is charged from the powder charging port 3 to start kneading in the mixer body 1. Simultaneously with the operation of the piston rod 12, the connected rack member 10 moves forward and the annular member 7 meshing with it moves clockwise. After the powder has been charged, the cylinder 11 is activated again to pull in the piston rod 12 and the opening / closing gate 16 is closed. Simultaneously with the operation of the piston rod 12, the rack member 10 connected to the piston rod 12 moves backward, and the annular member 7 meshed with the rack member 10 rotates in the counterclockwise direction. By this operation, even if the powder or the semi-kneaded mixture is attached to the inner wall of the powder charging port 3, it is scraped off by the rotating first scraper 9. Also, what has adhered to the inner peripheral surface of the annular member 7 is scraped off by the second scraper 15. Even if the continuous operation is repeated in this manner, the deposits on the powder inlet 1 and the inner periphery of the annular member are scraped off at each operation of the opening / closing gate 16, so that the deposits and deposits do not occur, and the first scraper 9 and Since the second scraper 15 has a small surface area, it hardly adheres to it.

[0008]

[Effect of the device]

 As is apparent from the above embodiments, the present invention attaches a fixing member having an opening having a diameter substantially the same as that of the powder input port to the powder input port of the mixer, and the gear part on the outer periphery of the opening of the fixing member. A ring-shaped member that has been formed is rotatably fitted horizontally, and the first scraper that protrudes downward in the vicinity of the inner wall of the powder injection port is fixed to the inside of the ring-shaped member, and meshes horizontally with the gear part. A sliding rack member is mounted on the case member, and the case member with the insertion holes is fixed to the fixing member while covering the annular member and the rack member.The case member is placed inside the case member and close to the inner peripheral surface of the annular member. A second scraper projecting downward is fixed, an opening / closing gate driven by the cylinder is connected above the case member, and the rack member is connected to the piston rod of the cylinder. According to this invention, even if powder or a semi-kneaded mixture is attached to the inner wall of the powder inlet of the mixer, it is scraped off by the rotating first scraper and attached to the inner peripheral surface of the annular member. Since it is scraped off by the second scraper, it does not adhere to and deposit on the powder charging port even after repeated continuous operation. Therefore, cleaning of the powder charging port is significantly reduced, the operation rate of the mixer is improved, and the efficiency of kneading work is improved. In addition, since the rotating operation of the annular member is shared with the cylinder that drives the opening / closing gate, it can be constructed at low cost and the device has a compact effect.

[Brief description of drawings]

FIG. 1 is a sectional front view of an input scraper device of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a plan view showing a main part of FIG.

FIG. 4 is a sectional front view of a conventional mixer.

[Explanation of symbols]

 1 Mixer Main Body 2 Screw 3 Powder Feeding Port 4 Top Flange 5 Fixing Member 6 Opening 7 Ring Member 8 Gear Part 9 1st Scraper 10 Rack Member 11 Cylinder 12 Piston Rod 13 Case Member 14 Loading Hole 15 Second Scraper 16 Opening Gate 17 Arm member

Claims (1)

[Scope of utility model registration request] 1. A mixer having a cylindrical powder inlet in the upper part of a mixer main body and an opening / closing gate driven by a cylinder above the powder inlet, wherein the powder is introduced into the powder inlet. A fixing member having an opening having substantially the same diameter as the charging port is attached, and an annular member having a gear part formed on the outer periphery is horizontally rotatably fitted to the opening of the fixing member, and the powder is charged inside the annular member. A first scraper, which protrudes downward in proximity to the inner wall of the mouth, is fixed, a rack member that engages with the gear portion and slides so as to be horizontally movable is assembled, and the annular member and the rack member are covered and a charging hole is provided. The case member is fixed to the fixing member, and the second scraper, which protrudes downward in the vicinity of the inner peripheral surface of the annular member, is fixed to the inside of the case member, and is driven by the cylinder above the case member. Opening and closing game And the rack member is connected to the piston rod of the cylinder.