Forced single-horizontal-shaft concrete mixer

Abstract

The utility model discloses a forced single-horizontal-shaft concrete mixer, and belongs to the technical field of concrete processing equipment. Comprising a rack, a stirring device, a transmission control system and a limiting device, the stirring device comprises a stirring barrel and a stirring shaft, the stirring shaft is rotationally connected to the rack, the stirring barrel is transversely and rotationally connected to the stirring shaft, and a material opening and a discharging rod are arranged on the stirring barrel; the output end of the transmission control system is connected with the stirring shaft through a coupler; the limiting device comprises a limiting rod and a limiting sleeve, and the limiting rod can be inserted into the limiting sleeve, so that the phenomenon that the stirring barrel rotates in the stirring or discharging process is prevented; the device further comprises a cover plate, a material guide plate and an auxiliary rod. The discharging device is convenient to operate, high in discharging speed, long in service life of the material port, more environmentally friendly and capable of saving resources.

Description

Technical Field

[0001] The utility model relates to a concrete mixer, in particular to a forced single-horizontal-shaft concrete mixer, belonging to the technical field of concrete processing equipment. Background Technique

[0002] The forced single-horizontal-shaft concrete mixer is a common concrete mixing equipment. Different from the large-scale forced single-horizontal-shaft concrete mixers used in factories or projects, during the research on recycled concrete or concrete additives, a small forced single-horizontal-shaft concrete mixer is often needed to mix experimental materials. This application is a small forced single-horizontal-shaft concrete mixer for experiments.

[0003] The forced single-horizontal-shaft concrete mixer generally includes a frame, a mixing device, a transmission system and a limiting device. The frame is the supporting part of the whole equipment and is welded by channel steel. The mixing device includes a mixing drum, a mixing shaft and mixing blades. The outer side surface of the mixing drum is provided with a feed inlet. The mixing drum is horizontally rotatably connected to the frame. The mixing blades include two groups. The mixing blades are fixedly connected to the mixing shaft. The mixing blades are located inside the mixing drum. The mixing shaft is rotatably connected to the mixing drum. The transmission system includes a reduction motor and a coupling. The coupling is fixedly sleeved on the output shaft of the reduction motor. The mixing shaft is coaxially connected to the coupling. The limiting device includes a limiting rod and a limiting hole opened on the side surface of the mixing drum. The limiting rod is inserted into the limiting hole to prevent the mixing drum from rotating during the mixing and discharging processes. At present, when the forced single-horizontal-shaft concrete mixer is used for mixing, generally, the discharge port of the mixing drum is upward, the limiting rod is inserted into the limiting hole to lock the position of the mixing drum. At this time, the aggregate is poured into the mixing drum, and the mixing motor is started to make the mixing blades rotate to mix the aggregate. After mixing, the limiting rod is pulled out, the mixing drum is rotated to make the discharge port inclined downward. At this time, the limiting rod is inserted into another limiting hole to lock the position of the mixing drum, and at the same time, the mixed material is discharged through the feed inlet.

[0004] The above-mentioned mixer (mainly a small-sized mixer for experimental use) usually has a rectangular inlet for its device. The aperture of the inlet is too small, resulting in a slow feeding efficiency. During the process of pouring raw materials, it is very likely that the raw materials will be scattered around the inlet due to the small size of the inlet, which is inconvenient for cleaning and collection, leading to waste of raw materials. Moreover, the rectangular inlet structure is also inconvenient for adding materials. Installing a funnel at the inlet will affect the rotation of the mixing drum, thus affecting the discharging function. In addition, when the existing small-sized forced single-horizontal-axis concrete mixer for experimental use discharges materials, the rotation of the mixing drum is driven by the operator manually pulling the discharging rod to drive the mixing drum to rotate. Since the overall weight is relatively large after adding concrete into the mixing drum, it requires a great deal of effort for the staff to rotate the mixing drum during discharging of the concrete mixer, greatly increasing the labor load of the staff and also being unfavorable for improving the work efficiency of the staff. Summary of the Invention

[0005] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a forced single-horizontal-axis concrete mixer.

[0006] The technical solution adopted by the utility model is as follows: Design a forced single-horizontal-axis concrete mixer, including:

[0007] A frame, welded by channel steel;

[0008] A mixing device, which includes a mixing drum, a mixing shaft and mixing blades. The mixing blades are fixedly connected to the mixing shaft. The mixing shaft is rotatably connected to the frame. The mixing drum is horizontally rotatably connected to the mixing shaft. The mixing blades are located inside the mixing drum. A material inlet and a discharging rod are arranged on the mixing drum;

[0009] A transmission control system, which includes a reduction motor and a controller electrically connected to the reduction motor. The output end of the reduction motor is connected to the mixing shaft;

[0010] A limiting device, which includes a limiting rod arranged on the frame and a limiting sleeve arranged on the side of the mixing drum. At least two limiting sleeves are provided. The limiting rod is inserted into the limiting sleeve to prevent the mixing drum from rotating during the mixing or discharging process;

[0011] It further includes:

[0012] A cover plate, which is hingedly arranged at the material inlet and can be opened backward and obliquely supported at the rear side of the material inlet. At this time, the lower end of the cover plate is located inside the material inlet. The cover plate includes a web and wing plates respectively arranged on the left and right sides of the web. When the cover plate is opened, the web and the wing plates enclose a feeding channel;

[0013] A guiding plate, which is obliquely arranged at the lower end of the frame. When discharging, the material inlet abuts against the upper end of the guiding plate, and the materials coming out of the material inlet enter the guiding plate and are converged and discharged by it;

[0014] An auxiliary rod is arranged on the mixing drum and is for an operator to step on when discharging materials.

[0015] Furthermore, multi-functional rods are respectively arranged on the left and right sides of the front part and the left and right sides of the rear part of the cover plate. Ear plates are respectively arranged on the left and right sides of the rear part of the material opening. Hinge holes are arranged on the ear plates. The multi-functional rods on the left and right sides of the rear part of the cover plate respectively penetrate into the hinge holes.

[0016] Furthermore, a diagonal brace is also arranged on the rear part of the cover plate. When the cover plate is inclined and supported on the rear side of the material opening, the diagonal brace abuts against the edge of the rear side of the material opening.

[0017] Furthermore, a limit bolt is threadedly connected to the ear plate on at least one side of the material opening. A corresponding limit hole is arranged on the cover plate. When the cover plate is inclined and supported on the rear side of the material opening, the limit bolt is screwed into the limit hole to fix the cover plate.

[0018] Furthermore, a pull ring is arranged on the upper surface of the cover plate. The front end of the wing plate is chamfered. The limit hole is arranged as an oblong hole.

[0019] Furthermore, the guide plate includes a large end and a small end which are integrally formed. The large end is a C-shaped plate for receiving the material opening. The left and right sides of the large end are respectively connected and fixed to the frame by two groups of bolts. The small end has a trumpet-shaped flow channel for receiving the material coming out of the large end and gradually converging the material and then flowing out.

[0020] Furthermore, a buffer plate is arranged on the guide plate. The buffer plate is arranged at the large end. A plurality of buffer springs are arranged between the buffer plate and the guide plate. When discharging materials, the material opening abuts against the buffer plate.

[0021] Furthermore, a guide rod is arranged in the buffer spring. The guide rod penetrates through the guide plate and is slidably connected to the guide plate. The guide rod is fixedly connected to the buffer plate. A limit cap is arranged at one end of the guide rod located below the guide plate.

[0022] Furthermore, the discharge rod is arranged at the upper end of one side of the mixing drum, and the auxiliary rod is arranged at the lower end of one side of the mixing drum. The discharge rod and the auxiliary rod are arranged on the same side of the mixing drum.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] The utility model is provided with a cover plate hinged at the material inlet, and the cover plate can be opened backward and inclined to support at the rear side of the material inlet, which is equivalent to extending and expanding the material inlet upward. Raw materials such as concrete aggregates can enter the material inlet along the cover plate and finally enter the mixing drum, facilitating the accurate entry of materials into the mixing drum, reducing leakage and spillage, saving resources, improving environmental protection. After the raw materials are added, the cover plate is lowered, which can prevent the splashing of materials during mixing and reduce noise, further improving the environmental protection of the equipment. By obliquely arranging a material guiding plate at the lower end of the frame, when discharging, the material inlet abuts against the upper end of the material guiding plate, and the materials coming out of the material inlet enter the material guiding plate and are converged and discharged by it, facilitating the discharging of the mixing drum, and it is more convenient for the materials to enter the receiving appliance after being converged by the material guiding plate. In addition, through the arrangement of the material guiding plate, when the operator rotates the mixing drum, after the material inlet of the mixing drum rotates to the position of the material guiding plate, it can lean on the material guiding plate, and then insert the discharging rod. The materials flow along the material guiding plate into the container placed at the outlet of the material guiding plate in advance, without the operator continuing to apply force to the mixing drum to prevent the excessive rotation of the mixing drum, nor does the operator need to control the alignment and insertion of the discharging rod and the limiting sleeve while preventing the excessive rotation of the mixing drum, reducing the operation difficulty. Through the arrangement of the auxiliary rod, when discharging, the operator holds the discharging rod with one hand and then pedals the auxiliary rod with one foot, exerting force with both hands and feet at the same time, making it easier to rotate the mixing drum in the originally static state. After the mixing drum rotates, release the auxiliary rod and continue to rotate the mixing drum with the hand, reducing the labor load of the staff, improving the work efficiency of the staff, and solving the problem that more manpower is required at the initial stage of discharging of the concrete mixer. Brief Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 Isometric Figure 1 Schematic diagram.

[0027] Figure 2 Is Figure 1 Schematic diagram of the closed cover plate.

[0028] Figure 3 Isometric Figure 2 Schematic diagram.

[0029] Figure 4 Is Figure 3 Schematic diagram of the discharging state.

[0030] Figure 5 Is the cover plate schematic diagram of the present utility model.

[0031] Figure 6 This is an assembly schematic diagram of a material guiding plate, a buffer plate, etc. of the present utility model.

[0032] In the figure: 1, frame; 2, mixing drum; 3, mixing shaft; 4, mixing shovel blade; 5, material inlet; 6, discharge rod; 7, reduction motor; 8, controller; 9, limiting rod; 10, limiting sleeve; 11, cover plate; 12, material guiding plate; 13, auxiliary rod; 14, multi-functional rod; 15, ear plate; 16, diagonal bracing bar; 17, limiting bolt; 18, limiting hole; 19, pull ring; 20, buffer plate; 21, buffer spring; 22, guiding rod; 23, limiting cap. Specific embodiments

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0034] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, if the terms "installation", "connection", and "connection" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] Embodiment 1

[0036] As Figures 1 - 6As shown in the figure, a forced single-horizontal-shaft concrete mixer includes: a frame 1, a mixing device, a drive control system, and a limit device. The frame 1 is welded by channel steel and is the support part of the entire equipment. The mixing device includes a mixing drum 2, a mixing shaft 3, and mixing blades 4. The mixing blades 4 are fixedly connected to the mixing shaft 3. The mixing shaft 3 is rotatably connected to the frame 1. The mixing drum 2 is horizontally rotatably connected to the mixing shaft 3. The mixing blades 4 are located inside the mixing drum 2. A feeding port 5 and a discharging rod 6 are provided on the mixing drum 2. The drive control system includes a reduction motor 7 and a controller 8 electrically connected to the reduction motor 7. The output end of the reduction motor 7 is connected to the mixing shaft 3 through a coupling. The limit device includes a limit rod 9 provided on the frame 1 and a limit sleeve 10 provided on the side of the mixing drum 2. At least two limit sleeves 10 are provided. The limit rod 9 is slidably connected to the frame 1 and can be inserted into the limit sleeve 10 to prevent the mixing drum 2 from rotating during the mixing or discharging process. A connecting rod and a foot pedal are also connected to the limit rod 9 for operating the limit rod 9 to slide into or out of the limit sleeve 10. All of the above are prior art means.

[0037] The compulsory single-horizontal-shaft concrete mixer provided in this embodiment further includes a cover plate 11, a guide plate 12, and an auxiliary rod 13. The cover plate 11 is hingedly arranged at the material inlet 5. Specifically, its rear end is hinged to the material inlet 5, and its front end can manually open or close the material inlet 5. It can be opened backward and inclinedly supported at the rear side of the material inlet 5. At this time, the lower end of the cover plate 11 is located inside the material inlet 5. The cover plate 11 includes a web and wing plates respectively arranged on the left and right sides of the web. When the cover plate 11 is opened, the web and the wing plates enclose a feeding channel. When the cover plate 11 is opened backward and inclinedly supported at the rear side of the material inlet 5, it is equivalent to extending and enlarging the material inlet 5 upward. Raw materials such as concrete aggregates can enter the material inlet 5 downward along the feeding channel of the cover plate 11 and finally enter the mixing drum 2, which is convenient for the materials to accurately enter the mixing drum 2, reduce leakage and spillage, save resources, improve environmental protection. After the raw materials are added, the cover plate 11 is lowered, which can prevent the materials from splashing during mixing and reduce noise, further improving the environmental protection of the equipment. The guide plate 12 is inclinedly arranged at the lower end of the frame 1. During discharging, the material inlet 5 abuts against the upper end of the guide plate 12. The materials coming out of the material inlet 5 enter the guide plate 12 and are converged and discharged by it, which is convenient for the mixing drum 2 to discharge materials. It is more convenient for the materials to be converged by the guide plate 12 and then enter the receiving appliance. In addition, through the arrangement of the guide plate 12, when the operator rotates the mixing drum 2, the material inlet 5 of the mixing drum 2 can lean on the guide plate 12 after rotating to the guide plate 12. Then, the discharging rod 6 is inserted. The materials flow along the guide plate 12 into the container placed at the outlet of the guide plate 12 in advance, without the operator continuing to apply force to the mixing drum 2 to prevent the mixing drum 2 from rotating excessively, nor does the operator need to control the alignment and insertion of the discharging rod 6 with the limit sleeve 10 while preventing the mixing drum 2 from rotating excessively, reducing the operation difficulty. The auxiliary rod 13 is arranged on the mixing drum 2 and is for the operator to step on during discharging. During discharging, for the operator, it takes a lot of effort to turn the mixing drum 2 from the static state to the rotating state. Based on this, in this embodiment, through the arrangement of the auxiliary rod 13, when discharging is required after mixing is completed, the operator holds the discharging rod 6, and then steps on the auxiliary rod 13 with one foot. Using both hands and feet at the same time, it is easier to rotate the originally static mixing drum 2. After the mixing drum 2 rotates, release the auxiliary rod 13 and continue to rotate the mixing drum 2 with the hand.

[0038] Embodiment 2

[0039] This embodiment is a further optimization and refinement of the cover plate 11 and its connection structure on the basis of Embodiment 1. Specifically:

[0040] On the left and right sides of the front part and the left and right sides of the rear part of the cover plate 11, multi-functional rods 14 are respectively arranged. On the left and right sides of the rear part of the material port 5, ear plates 15 are respectively arranged. Hinge holes are arranged on the ear plates 15, and the multi-functional rods 14 on the left and right sides of the rear part of the cover plate 11 respectively penetrate into the hinge holes. The cover plate 11 is hinged through the connection of the multi-functional rods 14 on the left and right sides of its rear part and the ear plates 15. When the cover plate 11 rotates to block the material port 5, the cover plate 11 is prevented from further rotating and is placed on the material port 5 through the multi-functional rods 14 on the left and right sides of its front part.

[0041] Embodiment 3

[0042] Based on Embodiment 2, this embodiment provides a specific structure in which the cover plate 11 opens backward and is inclined to support at the rear side of the material port 5: An inclined support bar 16 is further arranged on the upper surface of the rear part of the cover plate 11. When the cover plate 11 is inclined to support at the rear side of the material port 5, it abuts against the edge of the rear side of the material port 5 through the inclined support bar 16. In this embodiment, when the cover plate 11 is inclined to support at the rear side of the material port 5, the inclination angle is 45°. At the same time, a slope is arranged on the side of the inclined support bar 16 close to the edge of the rear side of the material port 5, and the slope is also a 45° slope. When the cover plate 11 is inclined to support at the rear side of the material port 5, the slope surface of the inclined support bar 16 fits with the upper surface of the edge of the rear side of the material port 5, and the support is more stable and reliable.

[0043] Embodiment 4

[0044] Based on Embodiment 3, this embodiment provides another specific structure in which the cover plate 11 opens backward and is inclined to support at the rear side of the material port 5: A limit bolt 17 is threadedly connected to the ear plate 15 on at least one side of the material port 5, and a corresponding limit hole 18 is provided on the cover plate 11. When the cover plate 11 is inclined to support at the rear side of the material port 5, the limit bolt 17 is screwed into the limit hole 18 to fix the cover plate 11. In this way, the cover plate 11 can also be inclined to support at the rear side of the material port 5. It can be understood that the technical solution of Embodiment 4 can be set simultaneously with the technical solution of Embodiment 3, so that the cover plate 11 is more stable and reliable when inclined to support at the rear side of the material port 5, and the two technical solutions can also be set independently of each other.

[0045] In this embodiment, a pull ring 19 is arranged on the upper surface of the cover plate 11 to facilitate controlling the opening and closing of the cover plate 11. The front end of the wing plate is chamfered to prevent interference with the front side of the material port 5 during the rotation of the wing plate. The limit hole 18 is arranged as an oblong hole to facilitate quick alignment of the holes and insertion of the limit bolt 17.

[0046] Embodiment 5

[0047] Based on Embodiment 4, this embodiment further optimizes and refines the structure of the guide plate 12, specifically as follows:

[0048] The material guide plate 12 includes an integrally formed large end and a small end, the large end is a C-shaped plate for receiving the material port 5, the left and right sides of the large end are respectively connected and fixed to the frame 1 by two sets of bolts, or can be fixed by welding, the former is more convenient for disassembly and maintenance, the small end has a trumpet-shaped flow channel for receiving the material coming out of the large end and gradually converging the material and then flowing out, which is convenient for collection. The structure of the material guide plate 12 is relatively simple and practical, and the material coming out of the material port 5 can be fully received and then collected into a designated container.

[0049] Example 6

[0050] This embodiment is based on the embodiment 5, and further optimizes and refines the structure of the guide plate 12, specifically:

[0051] A buffer plate 20 is arranged on the material guide plate 12, and the buffer plate 20 is arranged at the large end. A plurality of buffer springs 21 are arranged between the buffer plate 20 and the material guide plate 12, and the two ends of the buffer spring 21 are respectively connected and fixed to the material guide plate 12 and the buffer plate 20. When unloading, the material port 5 abuts against the buffer plate 20, so that when the material port 5 stops, it is in flexible contact with the buffer plate 20 and the buffer spring 21 to reduce the impact, protect the structure of the material port 5, and avoid the material port 5 from being deformed by collision when the mixing drum 2 is used for a short time, affecting the subsequent use.

[0052] In this embodiment, a guide rod 22 is arranged in the buffer spring 21, and the guide rod 22 passes through the material guide plate 12 and is slidably connected to the material guide plate 12. The guide rod 22 is fixedly connected to the buffer plate 20, and a limiting cap 23 is arranged at one end of the guide rod 22 located on the lower side of the material guide plate 12. Through the setting of the guide rod 22, the buffering direction of the buffer plate 20 is a single direction, which is convenient for maintaining stable contact with the material port 5 without disengagement.

[0053] Example 7

[0054] This embodiment is based on the embodiment 6, and further optimizes and refines the structure of the auxiliary rod 13, specifically:

[0055] The discharge rod 6 is arranged at the upper end of one side of the mixing drum 2, and the auxiliary rod 13 is arranged at the lower end of one side of the mixing drum 2. The discharge rod 6 and the auxiliary rod 13 are arranged on the same side of the mixing drum 2, which is convenient for one person to operate. The discharge rod 6 is a straight rod, and the auxiliary rod 13 is an L-shaped rod, which is easy to operate.

[0056] In this application, two limiting sleeves 10 are arranged on one side of the mixing drum 2, and the angle between the two limiting sleeves 10 is about 120°. That is, when the mixing drum 2 rotates for discharging, it stops after rotating 120° and then discharges. Therefore, the guiding plate 12 is arranged at an inclined angle of 30° to facilitate the docking of the material outlet 5. To increase the structural strength of the guiding plate 12, multiple rib plates (not shown in the attached drawings) can also be arranged between the guiding plate 12 and the frame 1.

[0057] When using this application, open the cover plate 11 to an inclined state and fix it. Add concrete raw materials into the mixing drum 2 along the cover plate 11, then fasten the cover plate 11 and start mixing. After mixing is completed, open the cover plate 11 to an inclined state and fix it. Then hold the discharging rod 6 by hand and step on the auxiliary rod 13, rotate the mixing drum 2. After the mixing drum 2 rotates, immediately release the auxiliary rod 13, and continue to apply pressure to the discharging rod 6 by hand. The mixing drum 2 continues to rotate until it abuts against the guiding plate 12. Insert the limiting rod 9 into the limiting sleeve 10 to fix the mixing drum 2 (it can be understood that it is not necessary to insert the limiting rod 9. It is completely possible to stop the mixing drum 2 by means of the guiding plate 12. However, for stable discharging and operation and to prevent accidental rotation of the mixing drum 2, it is more appropriate to insert the limiting rod 9). The material flows out from the material outlet 5 of the mixing drum 2 to the guiding plate 12 and is guided by the diversion plate into a container placed at the outlet of the guiding plate 12 in advance. Then, clean and reset the mixing drum 2 and insert the limiting rod 9 to fix it, and cover the cover plate 11.

[0058] In this application, a locking structure such as a bolt can also be arranged between the front side of the cover plate 11 and the material outlet 5. When discharging, open the cover plate 11 after the mixing drum 2 rotates into place. At this time, open the material outlet 5 on the mixer, and the concrete after mixing will flow out from the material outlet 5.

[0059] In addition, in the description of this utility model, unless otherwise specified, if the terms "multiple", "multiple roots", "multiple groups" are used, their meanings are two or more, and the meanings of "several", "several roots", "several groups" are one or more. In the description of this utility model, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing this utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to this utility model. In addition, if the terms "first", "second", "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0060] The specific embodiments of the present utility model have been described in detail in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments, and various changes can be made without departing from the gist of the present utility model within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A forced single-horizontal-shaft concrete mixer, comprising: A frame, welded by channel steel; A mixing device, which includes a mixing drum, a mixing shaft and mixing blades. The mixing blades are fixedly connected to the mixing shaft. The mixing shaft is rotatably connected to the frame. The mixing drum is horizontally rotatably connected to the mixing shaft. The mixing blades are located inside the mixing drum. A material inlet and a discharge rod are provided on the mixing drum; A drive control system, which includes a reduction motor and a controller electrically connected to the reduction motor. The output end of the reduction motor is connected to the mixing shaft; A limiting device, which includes a limiting rod provided on the frame and a limiting sleeve provided on the side of the mixing drum. At least two limiting sleeves are provided. The limiting rod is inserted into the limiting sleeve to prevent the mixing drum from rotating during the mixing or discharging process; It is characterized in that it further includes: A cover plate, which is hingedly arranged at the material inlet and can be opened backward and obliquely supported at the rear side of the material inlet. At this time, the lower end of the cover plate is located inside the material inlet. The cover plate includes a web and wing plates respectively arranged on the left and right sides of the web. When the cover plate is opened, the web and the wing plates enclose a feeding channel; A guide plate, which is obliquely arranged at the lower end of the frame. During discharging, the material inlet abuts against the upper end of the guide plate, and the material coming out of the material inlet enters the guide plate and is converged and discharged by it; An auxiliary rod, which is arranged on the mixing drum and is for an operator to step on during discharging.

2. The compulsory single horizontal shaft concrete mixer according to claim 1, characterized in that: On the left and right sides of the front part of the cover plate and the left and right sides of the rear part respectively, there are multifunctional rods. On the left and right sides of the rear part of the material inlet respectively, there are ear plates. Hinge holes are provided on the ear plates. The multifunctional rods on the left and right sides of the rear part of the cover plate respectively pass through the hinge holes.

3. The compulsory single-horizontal-shaft concrete mixer according to claim 2, characterized in that: An inclined support bar is further provided at the rear part of the cover plate. When the cover plate is obliquely supported at the rear side of the material inlet, the inclined support bar abuts against the edge of the rear side of the material inlet.

4. The compulsory single horizontal shaft concrete mixer according to claim 3, characterized in that: A limiting bolt is threadedly connected to the ear plate on at least one side of the material inlet. A corresponding limiting hole is provided on the cover plate. When the cover plate is obliquely supported at the rear side of the material inlet, the limiting bolt is screwed into the limiting hole to fix the cover plate.

5. The compulsory single horizontal shaft concrete mixer according to claim 4, characterized in that: A pull ring is provided on the upper surface of the cover plate. The front end of the wing plate is chamfered. The limiting hole is set as an oblong hole.

6. The compulsory single-horizontal-shaft concrete mixer according to any one of claims 1-5, characterized in that: The guide plate includes an integrally formed large end and a small end. The large end is a C-shaped plate for receiving the material inlet. The left and right sides of the large end are respectively connected and fixed to the frame by two groups of bolts. The small end has a trumpet-shaped flow channel for receiving the material coming out of the large end and gradually converging and discharging the material.

7. The compulsory single-horizontal-shaft concrete mixer according to claim 6, characterized in that: A buffer plate is provided on the guide plate. The buffer plate is arranged at the large end. A plurality of buffer springs are arranged between the buffer plate and the guide plate. During discharging, the material inlet abuts against the buffer plate.

8. The compulsory single horizontal shaft concrete mixer according to claim 7, wherein: A guide rod is arranged inside the buffer spring. The guide rod penetrates through the guide plate and is slidably connected to the guide plate. The guide rod is fixedly connected to the buffer plate. A limiting cap is arranged at one end of the guide rod located below the guide plate.

9. The compulsory single horizontal shaft concrete mixer according to claim 8, characterized in that: The discharge rod is arranged at the upper end of one side of the mixing drum, and the auxiliary rod is arranged at the lower end of one side of the mixing drum. The discharge rod and the auxiliary rod are arranged on the same side of the mixing drum.

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