Concrete drum mixer with scraping device

Abstract

The utility model discloses a concrete drum mixer with a scraping device, which comprises a drum mixer body, the drum mixer body comprises a rack, a fixing seat is further mounted on the rack, a linear fixing rod is mounted on the fixing seat, and the length direction of the fixing rod is parallel to the rotation central axis of a mixing drum; the fixing rod is located below the feeding hopper, and one end of the fixing rod extends into the stirring roller through a feeding port of the stirring roller; a scraping block mechanism is fixedly mounted at the end, located in the stirring roller, of the fixing rod, and the scraping block mechanism is formed by sequentially connecting a plurality of scraping pieces end to end through bolts; and a gap is reserved between the edge of the scraper and the inner wall of the stirring drum. By improving an existing drum mixer body at present, real-time operation can be carried out on the mixing drum by utilizing the scraping device, cement mortar deposition at the feed port of the mixing drum can be reduced, and manual clearing time is greatly saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to concrete or mortar construction equipment technical field, concretely relates to a concrete drum mixer with material scraping device. BACKGROUND

[0002] The concrete or mortar drum mixer includes JZC or JZM type. Its main working mode is to horizontally place a stirring drum, and multiple spiral blades are fixedly arranged along the inner wall in the drum. The stirring drum is driven to rotate forward by an external motor and a speed reducer, and materials such as gravel, sand and cement enter the drum through the horizontal feeding port of the drum and are fully stirred in the drum through the double action of the stirring drum and the spiral blades, so that the materials are uniformly mixed. After the materials are stirred, the stirring drum is reversed to push the stirred materials out of the drum through the discharge port of the drum by the spiral blades.

[0003] Since the feeding port and the discharge port of the drum are not sealed during rotation, in order to prevent the materials from overflowing during stirring, the drum volume of the drum mixer is higher than the actual stirring volume. For example, the drum volume of JZM750 mixer is 1200L, and the actual stirring volume is 750L. When stirring materials with strong adhesion such as 1:1 cement mortar, the materials are in a state of turbulence during stirring in the drum, so there is a lot of mortar adhering to the inner wall of the feeding port of the drum after stirring. In actual operation, the mixer is often in a continuous working state and is not cleaned immediately after stirring, so there is a lot of mortar accumulated and adhered to the inner wall of the feeding port of the drum when a shift ends. The adhered materials are difficult to clean when the drum is washed with water.

[0004] Since the feeding port of the drum is provided with a feeding hopper, it is difficult to use external shovels and other tools to remove the materials adhered to the inner wall of the feeding port of the drum during actual use. Therefore, if the drum mixer is continuously and frequently used to stir high-grade concrete or mortar, it is necessary to manually clean the materials adhered to the inner wall of the feeding port of the drum, which is time-consuming and laborious and difficult to operate. If the materials adhered to the inner wall of the feeding port of the drum are not cleaned, the actual stirring volume of the drum will decrease and the feeding port will be gradually blocked. UTILITY MODEL CONTENTS

[0005] The utility model provides a concrete drum mixer with material scraping device, which can clean the inner wall of the feeding port of the drum during stirring to solve the problems in the background art.

[0006] The technical scheme of the utility model discloses a concrete drum mixer with a material scraping device, which comprises a drum mixer body, the drum mixer body comprises a rack, a stirring drum and a driving mechanism for driving the stirring drum to rotate are horizontally arranged on the rack, the stirring drum comprises a feeding port and a discharging port, helical blades are arranged on the inner wall of the stirring drum, a feeding hopper and a water inlet pipe are also arranged on the rack, characterized in that: a fixing seat is arranged on the rack, a linear fixing rod is arranged on the fixing seat, the length direction of the fixing rod is parallel to the rotation central axis of the stirring drum, the fixing rod is located below the feeding hopper, and one end of the fixing rod extends to the inside of the stirring drum through the feeding port of the stirring drum, a scraping block mechanism is fixedly arranged at the end of the fixing rod located in the inside of the stirring drum, the scraping block mechanism is composed of a plurality of scraping blades which are connected in sequence and by bolts, and a gap is arranged between the edge of the scraping blade and the inner wall of the stirring drum.

[0007] Further, two scraping block mechanisms are fixedly arranged on the fixing rod, and the two scraping block mechanisms are symmetrical to each other.

[0008] Further, the gap between the edge of the scraping blade and the inner wall of the stirring drum is 5-8cm.

[0009] Further, the fixing rod is a steel pipe, and the fixing rod is rotationally connected with the fixing seat through a bearing.

[0010] The concrete drum mixer with the material scraping device has the advantages that: in addition to the conventional feeding structure, the material scraping device is additionally arranged, the material scraping device comprises a scraping block mechanism located in the inside of the stirring drum and a fixing seat and a fixing rod for connecting and fixing the scraping block mechanism, the scraping block mechanism is utilized to physically scrape the inner wall of the feeding port of the stirring drum before the cement mortar solidifies, the relative movement between the stirring drum and the scraping block mechanism is generated when the stirring drum rotates, and no additional external power is needed, so that the whole structure is simple and convenient to use.

[0011] The material scraping device has high economic efficiency, can be used for real-time operation on the stirring drum, can prevent the cement mortar from being deposited at the feeding port of the stirring drum after multiple shifts, greatly saves the manual cleaning time, is suitable for use in various cement mortar or concrete mixing sites, and is improved according to the current stirring drum. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic view of the drum mixer body in the utility model;

[0013] Figure 2 It is an internal structural schematic view of the stirring drum in the utility model.

[0014] Figure 3 Figure 1 is a schematic view of the installation structure of the scraper block mechanism in the utility model. DETAILED DESCRIPTION

[0015] The utility model will be further described below in combination with the drawings and examples:

[0016] Example reference signs: stirring drum 1, rack 2, cement mortar 3, feed inlet 1b, discharge outlet 1a, feed hopper 4, spiral blade 5, water inlet pipe 6, concrete 7, scraper block mechanism 8, fixing seat 9, fixing rod 10, bolt 8a, scraper 8b.

[0017] As Figure 1 , Figure 2 and Figure 3 indicated, the utility model discloses a concrete drum mixer with scraping device, including drum mixer body. The drum mixer body in this embodiment indicates JZM drum mixer, including JZM 350, JZM 500, JZM 100 type etc. drum horizontal transverse drum mixer, and generally adopt the loading of climbing bucket. The drum mixer body includes rack 2, and the rack 2 is horizontally transversely installed with stirring drum 1 and the driving mechanism for driving stirring drum 1 to rotate. As Figure 1 indicated, the right side of stirring drum 1 is equipped with feed inlet 1b, and feed hopper 4 is fixedly installed at feed inlet 1b. The upper portion of feed hopper 4 is provided with water inlet pipe 6 and additive pipe. The left side of stirring drum 1 is equipped with discharge outlet 1a, and the inner wall of stirring drum 1 is equipped with spiral blade 5.

[0018] Under normal circumstances, materials such as gravel, sand and cement are conveyed into feed hopper 4 through the climbing bucket, and then slide down to the feed inlet 1b of stirring drum 1 through feed inlet 1b and enter stirring drum 1. When stirring drum 1 rotates in the positive direction, the materials are stirred in stirring drum 1 by stirring blades. After stirring is completed, stirring drum 1 rotates in the reverse direction, and spiral blade 5 pushes the materials towards the discharge outlet 1a of stirring drum 1 and discharges. After stirring is completed, the inner wall of stirring drum 1 is cleaned by adding water into stirring drum 1. As Figure 2 indicated, when the transverse stirring drum 1 stirs materials, in order to prevent the materials from overflowing from the feed inlet 1b of stirring drum 1 during stirring, a margin must be left during design. That is, after the materials are uniformly stirred, the top surface of the materials will be lower than the lower edge of the feed inlet 1b of stirring drum 1. This will cause cement mortar 3 with cohesive force to deposit in the gap between the top surface of the materials after stirring is completed and the feed inlet 1b. When stirring drum 1 stirs materials, the remaining part of the inner wall of stirring drum 1 is scratched by the friction of gravel and other materials, but this part is not scraped by materials.

[0019] Cement mortar coagulation time is generally within six hours. And drum mixer general operation station for eight hours. Thus when the drum mixer to complete the operation and cleaning, there will be part of the cement mortar 3 stick in the drum mixer feed inlet 1b at the inner wall area, as shown in detail. Figure 1 As shown. Therefore, the drum mixer in continuous use or stirring not more than a week, in the above area will stick to a large number of cement mortar 3. And this part of the cement mortar 3 can not be cleaned with water. Once the accumulation of too much, the material through the feed hopper 4 into the drum mixer inside, due to the material falling speed is higher than the screw blade 5 inside the drum mixer to the discharge port 1a push material speed, will lead to such as fine sand, cement powder and so on through the feed hopper 4 below the space to the outside, at this time the drum mixer can not continue to use, need to be cleaned manually and time-consuming and laborious, very inconvenient.

[0020] Therefore, the embodiment for the above problems, the rack 2 is installed with fixed seat 9. Fixed seat 9 is installed with straight type fixed rod 10. Fixed rod 10 length direction is parallel with the rotation of the mixing drum 1 mid axis. Fixed rod 10 is located below the feed hopper 4, and the fixed rod 10 one end through the mixing drum 1 feed inlet 1b extends to the inside of the mixing drum 1. Fixed rod 10 is located at the end of the mixing drum 1 inside fixed installation of the scraper block mechanism 8, the scraper block mechanism 8 is connected by a number of scraper 8b in turn head to tail, and through the bolt 8a. The edge of the scraper 8b and the inner wall of the mixing drum 1 is left with a gap. As shown in Figure 3 The cross section of the drum mixer feed inlet 1b along the arrangement of the scraper block mechanism 8 is shown. Two scraper block mechanism 8 is arranged in a figure eight shape and left and right symmetrically. When the drum mixer rotates, whether it is in the positive direction or the reverse direction, the scraper block mechanism 8 can directly remove the cement mortar 3 on the inner wall of the drum mixer. It should be noted that: because the concrete 7 and other dry materials are different, it not only has high quality (2.4 tons per cubic concrete), but also has high impact force when the mixing drum 1 rotates, so the scraper 8b of the scraper block mechanism 8 is preferably not in direct contact with the inner wall of the mixing drum 1, and a gap is left between the inner wall of the mixing drum 1. The gap value is 5-8 cm, which is the best effect. On the one hand, it helps to prevent the scraper 8b from being quickly worn out, and on the other hand, it reduces the friction resistance between the scraper 8b and the concrete 7.

[0021] And in the final design of the specific selection and structure, we choose steel pipe as fixed pipe, and the steel pipe is connected with the fixed seat 9 through the bearing. Due to the gravity of the scraper block mechanism 8, the scraper block mechanism 8 will sag under its own gravity without external force, as shown in Figure 3The scraping block mechanism 8 can be in a swing state along the circumference of the fixed rod 10 to reduce the impact of the concrete 7 and prevent the external resistance of the stirring drum 1 from increasing if the impact of the concrete 7 on the scraping block mechanism 8 is large when the stirring drum 1 is stirring the concrete 7. Since the cement mortar 3 is in a flow state when being stirred, the scraping block mechanism 8 does not essentially need to strongly scrape the cement mortar 3, and it is only necessary to scrape the cement mortar 3 before the cement mortar 3 solidifies.

[0022] Essentially, the scraping block mechanism 8 in the present scheme adopts a multi-section structure, and a plurality of scraping blocks are sequentially connected through the bolts 8a. The main purpose is to facilitate adjustment of the shape of the scraping block mechanism 8 so that the overall shape of the scraping block mechanism 8 can adapt to the inner wall of the stirring drum 1 and leave a gap. After the scraping blocks 8b are used for a period of time and are worn, the overall shape of the scraping block mechanism 8 can be adjusted through adjustment of the bolts 8a, and each component can be fully utilized.

[0023] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A concrete drum mixer with a material scraping device, comprising a drum mixer body, the drum mixer body comprising a frame (2) on which a mixing drum (1) and a driving mechanism for driving the mixing drum (1) to rotate are horizontally transversely mounted; the mixing drum (1) comprises a feeding port (1b) and a discharging port (1a), and helical blades (5) are mounted on the inner wall of the mixing drum (1); the frame (2) is further provided with a feeding hopper (4) and a water inlet pipe (6); characterized in that: The frame (2) is further provided with a fixing base (9), a linear fixing rod (10) is installed on the fixing base (9), the length direction of the fixing rod (10) is parallel to the rotation central axis of the stirring drum (1); the fixing rod (10) is located below the feeding hopper (4), and one end of the fixing rod (10) extends to the inside of the stirring drum (1) through the feeding port (1b) of the stirring drum (1); the end of the fixing rod (10) located in the inside of the stirring drum (1) is fixedly provided with a scraping block mechanism (8), the scraping block mechanism (8) is formed by a plurality of scraping blocks (8b) which are sequentially connected in a head-to-tail mode and are connected by bolts (8a); a gap is formed between the edge of the scraping block (8b) and the inner wall of the stirring drum (1).

2. A concrete drum mixer having a material scraping device as claimed in claim 1 wherein: The fixing rod (10) is fixedly provided with two scraping block mechanisms (8), and the two scraping block mechanisms (8) are symmetrically arranged.

3. A concrete drum mixer with a material scraping device as claimed in claim 1, characterized in that: The gap between the edge of the scraping block (8b) and the inner wall of the stirring drum (1) is 5cm-8cm.

4. A concrete drum mixer with a material scraping device according to any one of claims 1 to 3, characterized in that: The fixing rod (10) is a steel pipe, and the fixing rod (10) is rotationally connected with the fixing base (9) through a bearing.

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