Self-sealing mixing drum and self-sealing method thereof

Abstract

The present invention discloses a self-enclosed mixing drum, comprising a material chamber, the front end of which is connected to the material port, and an opening is arranged on the side wall of the material chamber, a material separation chamber, which is connected to the rear end of the material chamber and forms a connecting space, and an inner baffle, which is arranged in the connecting space and is used to block the connection between the material chamber and the material separation chamber. The present invention firstly realizes the self-enclosed function without increasing the cost or only increasing the cost very little, and ensures that there is no leakage of materials; secondly, it improves the loading rate of concrete, and the filling rate of the mixing drum reaches more than 85% without affecting the feeding and discharging of the mixing drum; thirdly, it does not have very high requirements on the sealing of the internal weld of the mixing drum, and the process is simple to implement; fourthly, it does not need to increase the inclination angle of the mixing drum and increase the center of gravity height during the climbing process, and the safety is relatively high; fifthly, it does not need to add an additional sealing device at the back of the mixing drum for sealing, and the process is simple and reduces the cost.

Description

Technical Field

[0001] The invention belongs to the technical field of engineering transportation, and in particular, relates to a self-sealing mixing drum and a self-sealing method thereof. Background Art

[0002] A concrete mixer truck consists of a car chassis and a special device for concrete mixing and transportation. The special device for concrete mixing and transportation mainly includes a power take-off, front and rear brackets of a mixing drum, a reducer, a hydraulic system, a mixing drum, an operating mechanism, a cleaning system, etc. The mixing drum is a loading container for concrete, which plays the role of loading, mixing and unloading ready-mixed concrete.

[0003] The working mode of the existing mixing drum is that the mixing drum rotates to make the concrete move along the spiral direction of the blades, and is mixed and stirred during the occasional lifting and turning process. During the feeding and transportation process, the mixing drum rotates forward, and the concrete moves inward along the blades until it contacts the sealing device at the other end, that is, the concrete is loaded and prevented from leaking. When discharging, the mixing drum reverses and the commercial concrete is discharged outward along the blades.

[0004] The above working method has the following defects:

[0005] First, the mixing drum of existing mixer trucks does not have a self-sealing function, and will leak material when climbing a large slope. In order to ensure that there is no leakage, the inclination angle of the mixing drum is often increased, the center of gravity height is increased, and safety is reduced;

[0006] Second, the existing closed mixing drum or mixing truck technologies all add a sealing device to the back of the mixing drum, and both require the addition of a power and control system, which is costly and complex in structure. Summary of the invention

[0007] The present invention provides a self-sealing mixing drum and a self-sealing method thereof, which solve the problems raised in the above background technology.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is: a self-enclosed mixing drum, comprising a mixing drum,

[0009] A material tank, wherein a material port is provided on one side of the mixing drum, a front end of the material tank is connected to the material port, and an opening is provided on a side wall of the material tank;

[0010] A material isolation cabin, which is connected to the rear end of the material cabin and forms a connected space;

[0011] An inner baffle is arranged in the communicating space and is used to block the communication between the material compartment and the isolation compartment.

[0012] Preferably, the material filling line in the mixing drum is higher than the lowest point of the right side port of the material bin.

[0013] Preferably, the inner partition is located at the rear end of the opening.

[0014] Preferably, the two openings are located on the cargo hold and are arranged adjacent to each other.

[0015] Preferably, the two openings are arranged opposite to each other.

[0016] Preferably, it comprises a spiral blade, wherein the spiral blade is sleeved on the outside of the material chamber and the isolation chamber, and the top edge of the spiral blade is in contact with the inner wall of the mixing drum to form a closed arrangement.

[0017] Preferably, the adjacent spiral blades are used as side surfaces, the outer walls of the material chamber and the material separation chamber are used as bottom surfaces, and the inner wall of the mixing drum is used as the top surface to form a spiral space.

[0018] Preferably, the inner baffle is arranged at the joint between the material chamber and the isolation chamber, and the plate surface of the inner baffle and the opening surface of the material port are arranged at an inclined angle.

[0019] Preferably, the material chamber, the circular cross-section of the material partition chamber, the opening surface of the material port and the plate surface of the inner partition are arranged parallel to each other.

[0020] A self-sealing method for a self-sealing mixing drum comprises the following steps:

[0021] Step S1, the mixing drum is turned on and the material enters the material chamber from the material port of the mixing drum;

[0022] Step S2, the material enters the spiral space from the opening at the bottom of the material bin and flows into the next spiral space as the mixing drum rotates;

[0023] Step S3, the material flows from the spiral space into the mixing drum and is gradually filled;

[0024] Step S4, the material in the material compartment with a tendency to move toward the material port is blocked by the inner partition, and when the material fills the mixing drum, the material filling line is higher than the lowest point of the right port of the material compartment.

[0025] The beneficial effects of adopting the above technical solution are:

[0026] First, the self-sealing function is realized without increasing the cost or only increasing the cost very little, and it is ensured that there is no leakage; second, the loading rate of concrete is increased. Under the premise of not affecting the feeding and discharging of the mixing drum, the filling rate of the mixing drum is made to reach more than 85%, and a 14% slope can be climbed to ensure that there is no leakage; third, the strength is reliable, and there is no high requirement for the sealing of the internal welds of the mixing drum, and the process is simple to implement; fourth, there is no need to increase the inclination angle of the mixing drum and increase the center of gravity height during the climbing process, and the safety is relatively high; fifth, the concrete can be sealed only through the isolation cabin, and there is no need to add an additional sealing device at the back of the mixing drum for sealing, which simplifies the process and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is an assembly diagram of the self-enclosed mixing drum of the present invention;

[0028] Figure 2 It is an assembly diagram of the spiral blade of the present invention;

[0029] Figure 3 It is an assembly diagram of the cargo hold of the present invention;

[0030] Figure 4 It is an assembly diagram of the feed cabin of the present invention;

[0031] Figure 5 It is an assembly diagram of the mixing drum of the present invention;

[0032] Figure 6 This is an assembly diagram of the mixing drum of the present invention after the mixing drum is rotated by an angle.

[0033] Figure numerals: 1, mixing drum; 2, spiral blade; 3, material port; 5, material compartment; 6, inner partition; 7, material compartment; 8, opening; s, connecting space; p, material filling line; g, horizontal line; m, spiral space. DETAILED DESCRIPTION

[0034] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and facilitating its implementation.

[0035] like Figures 1 to 6 As shown, the present invention is a self-sealing mixing drum and a self-sealing method thereof, which improves the loading rate of concrete, that is, without affecting the feeding and discharging of the mixing drum, the filling rate of the mixing drum reaches more than 85%, and can also climb a 14% slope to ensure no leakage.

[0036] The specific working method is described below with specific embodiments:

[0037] Embodiment 1:

[0038] Since the mixing drum of existing mixer trucks does not have a self-sealing function, it will leak material when climbing a large slope. In order to ensure that there is no leakage, the inclination angle of the mixing drum is often increased, the center of gravity height is increased, and safety is reduced. At the same time, in this case, the filling rate of the mixing drum can only be controlled below 65%;

[0039] In addition, the existing closed mixing drum or mixer truck technologies all add a sealing device to the back of the mixing drum, and both require the addition of a power and control system, which is costly, complex in structure, has many failure points, and still has the risk of leakage.

[0040] Based on this, a self-enclosed mixing drum is proposed in this embodiment, including a material chamber 5, a material partition chamber 7 and an inner partition 6. The material port 3 of the mixing drum 1 is divided into the material chamber 5 and the material partition chamber 7 for entry and exit. When the material chamber 5 is only responsible for feeding, the material partition chamber 7 isolates the concrete in the mixing drum 1 from the material chamber 5.

[0041] More specifically, the front end of the material chamber 5 is connected to the material port 3, and an opening 8 is provided on the side wall of the material chamber 5; the partition chamber 7 is connected to the rear end of the material chamber 5 to form a connecting space s; an inner partition plate 6 is provided in the connecting space s to block the connection between the material chamber 5 and the partition chamber 7.

[0042] It should be noted that the material chamber 5 is used for the loading and unloading of materials, and the materials include but are not limited to concrete. As a preferred embodiment of the present invention, the material chamber 5 and the partition chamber 7 are made of cones. Of course, it is not difficult to understand that both can be cones but are not limited to cones. For example, they can also be polygonal bodies or cylinders, etc., all shapes that can be welded to the mixing blades. At the same time, the connection between the material chamber 5 and the partition chamber 7 can be welded or integrally formed.

[0043] For the connection structure between the cargo hold 5 and the bulkhead 7, in this embodiment, in order to achieve the best loading effect, refer to Figure 4 As shown in the figure, the line connecting the top edge contour lines of the material chamber 5 and the material partition chamber 7 can be a straight line. When it is a straight line, the loading capacity of the mixing drum 1 is the maximum. At this time, the line is collinear with the highest point of the right side port of the material chamber 5, and is also collinear with the highest material filling line p. It is not difficult for those skilled in the art to understand that in the straight line state, the ports at the connection of the material chamber 5 and the material partition chamber 7 are at the same height, but when the loading effect is required to be poor, this embodiment should include but is not limited to a straight line, for example, the docking ports of the material chamber 5 and the material partition chamber 7 are aligned at different heights, the material chamber 5 is higher than the material partition chamber 7, or the material partition chamber 7 is higher than the material chamber 5, or the docking height distance between the two is an irregular welding. The above methods can achieve the actual effect that the material filling line p in the mixing drum 1 of this embodiment is higher than the lowest point g of the right side port of the material chamber 5, and the right side port of the material chamber 5 is located at the position of the material port 3.

[0044] Furthermore, the inner baffle 6 is located at the rear end of the opening 8, and the inner baffle 6 is adapted to the inner cross section of the connecting space s to block the connecting space s. Therefore, the setting of the distance at the rear end should take into account the size of the inner cross section of the connecting space s, for example, it is located at the rear end of the opening 8 and at a relatively small position of the inner cross section of the connecting space s, so as to save the manufacturing cost of the inner baffle 6. The inner baffle 6 can be set at the rear end of the opening 8 by welding, and of course the inner baffle 6 can also be integrally formed with the cargo hold 5 or integrally formed with the cargo hold 7.

[0045] Furthermore, those skilled in the art should understand that the inner partition 6 is arranged at the joint of the material chamber 5 and the partition chamber 7, and the plate surface of the inner partition 6 and the opening surface of the material port 3 are arranged at an inclined angle, but this method will lengthen the length of the inner partition 6, thereby increasing the manufacturing cost. Therefore, as a preferred embodiment of the present invention, the circular cross-sections of the material chamber 5 and the partition chamber 7, the opening surface of the material port 3 and the plate surface of the inner partition 6 are arranged parallel to each other, which can also save the manufacturing cost.

[0046] The principle of this embodiment is as follows: the material enters the material chamber 5 from the material port 3. When the opening 8 rotates downward with the mixing drum 1, the material enters the pitch of the mixing blade from the opening 8 and continues to rotate with the mixing drum 1. The material is pushed into the loading internal space of the mixing drum 1. Due to the blocking effect of the inner partition 6 and the rotation of the mixing blade, the material cannot leak out along the original path and is blocked by the inner partition 6. Therefore, the internal space is gradually filled with the material, and the material filling line p gradually rises. When the material filling line p rises to the same level as the highest point of the material port 3, the loading of the material is completed. At this time, without affecting the feeding and discharging of the mixing drum, the filling rate of the mixing drum 1 is increased from 65% to more than 85%. It can also climb a 14% slope (equivalent to 8 degrees) to ensure that there is no leakage, and there is no leakage failure point. Refer to Figure 6 , the gray grid area in the figure is the actual effect of the material loading capacity increased by using this embodiment, that is, the material filling line p is higher than the lowest point g of the right side port of the cargo hold 5.

[0047] Example 2

[0048] Reference Figures 5-6 As shown in the diagram, in this embodiment, there are two openings 8, which are located on the material chamber 5 and are adjacent to each other. The specific shape of the opening surface can be rectangular, polygonal or circular, etc., so the specific shape and size should not be specially limited, and all belong to the protection content defined in this embodiment, and are used for the entry and exit of materials through the openings 8. However, due to the rotation of the mixing drum 1, the material chamber 5 will also rotate synchronously, so the two openings 8 are arranged opposite to each other, and the two are located at the farthest distance on the material chamber 5. When one of the openings 8 is located at the bottom, the other opening 8 is relatively located at the top, so the upper and lower spacing of the materials is the largest.

[0049] Furthermore, as a preferred embodiment of the present invention, a spiral blade 2 is further included, and the spiral blade 2 is sleeved outside the material chamber 5 and the material separation chamber 7, and the top edge of the spiral blade 2 is sealed against the inner wall of the mixing drum 1. The adjacent spiral blades 2 are used as the side surface, the outer wall of the material chamber 5 and the material separation chamber 7 is used as the bottom surface, and the inner wall of the mixing drum 1 is used as the top surface to form a spiral space m, which is also connected to the material port 3 for the process of unloading.

[0050] It should be noted that, based on the above embodiments, the best implementation method for the setting of the spiral blades 2 in this embodiment is: when the line connecting the top edge contour lines of the material chamber 5 and the partition chamber 7 is a straight line, the loading capacity of the mixing drum 1 is maximum. At this time, the connecting line is collinear with the highest point of the material port 3, and is also collinear with the highest material filling line p. Under this structure, the spiral blades 2 are fitted with the outer walls of the material chamber 5 and the partition chamber 7 to form a spiral space m.

[0051] It is not difficult for those skilled in the art to understand that if part of the loading capacity of the mixing drum 1 is discarded, that is, if the heights of the docking ends of the material chamber 5 and the material partition chamber 7 are not equal, the spiral blades 2 should also be adapted to the heights of the outer walls of the material chamber 5 and the material partition chamber 7, and be fitted together. In this state, the heights of the spiral blades 2 on the left and right sides are not equal. Although the loading effect is not optimal, a spiral space m can also be formed for the flow of material, thereby achieving the actual effect of the material filling line p proposed in this embodiment being higher than the lowest point g of the right side port of the material chamber 5, which is also better than the existing actual effect.

[0052] Example 3

[0053] Different from the above embodiment, this embodiment proposes a self-sealing method for a mixing drum, based on the self-sealing mixing drum proposed in the above embodiment, specifically comprising the following steps:

[0054] Step S1, the mixing drum 1 is turned on and rotated, and the material enters the material chamber 5 from the material port 3 of the mixing drum 1;

[0055] Step S2, the material enters the spiral space m from the opening 8 at the bottom of the material bin 5 and flows into the next spiral space m as the mixing drum 1 rotates;

[0056] Step S3, the material flows from the spiral space m into the mixing drum 1 and is gradually filled;

[0057] Step S4, the material in the material compartment 7 with a tendency to move toward the material port 3 is blocked by the inner partition 6. When the material fills the mixing drum 1, the material filling line p is higher than the lowest point g of the right side port of the material compartment 5.

[0058] By adopting the self-sealing method of the mixing drum proposed in this embodiment, the inlet and outlet ports 3 of the mixing drum 1 are separated into inlet and outlet material chambers 5 and partition chambers 7. The partition chambers 7 isolate the concrete in the mixing drum 1 from the inlet and outlet material chambers 5. The material chambers 5 and the partition chambers 7 are separated by welding, and the strength is reliable. Moreover, due to the poor fluidity of concrete, there are no high requirements for the sealing of the internal welds of the mixing drum 1. The process is simple to implement. At the same time, without affecting the feeding and discharging of the mixing drum 1, the filling rate of the mixing drum 1 can reach more than 85%, and it can climb a 14% slope to ensure no leakage, and there is no leakage failure point.

[0059] The method proposed in this embodiment is a feeding sealing process. It should be noted that when feeding, the material enters the material chamber 5 through the material port 3, and the spiral space m is actually also connected to the material port 3. When feeding, the mixing drum 1 rotates and the spiral blades 2 rotate synchronously. When feeding, the spiral blades 2 have a tendency to push the material movement into the barrel, so the material will not flow out of the material port 3 from the spiral space m during feeding.

[0060] Furthermore, when unloading, the mixing drum 1 rotates in the opposite direction to that when feeding, and the spiral blades 2 push the material in the spiral space m toward the material port 3. When the material in the mixing drum 1 is gradually pushed out, this unloading process is the same as the prior art and will not be described in detail. When the mixer truck climbs a slope, the concrete will first fall into the material isolation chamber 7. When the mixer truck tilts to a certain degree so that the height of the concrete exceeds the material filling line p, concrete leakage may occur. In addition, due to the poor fluidity of the concrete and the fact that the mixing drum 1 is always rotating in the "feeding direction", the possibility of concrete leakage is further reduced, that is, the device only needs to seal the concrete through the material isolation chamber 7.

[0061] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above-mentioned concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A self-enclosed mixing drum, comprising a mixing drum, wherein a material inlet (3) is provided on one side of the mixing drum, A material tank (5), wherein the front end of the material tank (5) is connected to the material port (3), and an opening (8) is provided on a side wall of the material tank (5); A material isolation chamber (7) which is connected to the rear end of the material chamber (5) and forms a connecting space (s); An inner baffle (6), wherein the inner baffle (6) is arranged in the communicating space (s) and is used to block the communication between the material chamber (5) and the isolation chamber (7).

2. A self-enclosed mixing drum according to claim 1, characterized in that: The material filling line (p) in the mixing drum (1) is higher than the lowest point (g) of the right side port of the material tank (5).

3. A self-enclosed mixing drum according to claim 1 or 2, characterized in that: The inner partition (6) is located at the rear end of the opening (8).

4. A self-enclosed mixing drum according to claim 3, characterized in that: The two openings (8) are located on the cargo hold (5) and are arranged adjacent to each other.

5. A self-enclosed mixing drum according to any one of claims 1 to 2 or 4, characterized in that: The two openings (8) are arranged opposite to each other and are located at the farthest distance on the cargo hold (5).

6. A self-enclosed mixing drum according to claim 5, characterized in that: It comprises a spiral blade (2), wherein the spiral blade (2) is sleeved on the outside of the material chamber (5) and the material separation chamber (7), and the top edge of the spiral blade (2) is in contact with the inner wall of the mixing drum (1) to form a closed arrangement.

7. A self-enclosed mixing drum according to claim 6, characterized in that: The adjacent spiral blades (2) are used as side surfaces, the outer walls of the material chamber (5) and the material separation chamber (7) are used as bottom surfaces, and the inner wall of the mixing drum (1) is used as the top surface to form a spiral space (m).

8. A self-enclosed mixing drum according to claim 6 or 7, characterized in that: The inner baffle (6) is arranged at the joint between the material chamber (5) and the separation chamber (7), and the plate surface of the inner baffle (6) and the opening surface of the material port (3) are arranged at an inclined angle.

9. A self-enclosed mixing drum according to claim 8, characterized in that: The circular cross-sections of the material chamber (5), the material separation chamber (7), the opening surface of the material port (3) and the plate surface of the inner partition plate (6) are arranged parallel to each other.

10. A self-sealing method for a self-sealing mixing drum according to claim 7, characterized in that: The following steps are also included: Step S1, the mixing drum (1) is turned on and rotated, and the material enters the material chamber (5) from the material port (3) of the mixing drum (1); Step S2, the material enters the spiral space (m) from the opening (8) at the bottom of the material bin (5) and flows into the next spiral space (m) as the mixing drum (1) rotates; Step S3, the material flows from the spiral space (m) into the mixing drum (1) and is gradually filled; Step S4, the material in the material compartment (7) with a tendency to move toward the material port (3) is blocked by the inner partition (6), and when the material fills the mixing drum (1), the material filling line (p) is higher than the lowest point (g) of the right side port of the material compartment (5).

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