Concrete mixing device for highway engineering

Abstract

The invention belongs to the field of highway engineering, and provides a highway engineering concrete mixing device which comprises a construction assembly, a stirring box, a stirring piece arranged in the stirring box, a shifting piece arranged in the stirring piece, a buckling piece arranged on one side of the stirring piece and a discharging assembly. Comprising a discharging piece arranged in the stirring box and a blocking piece arranged in the stirring box. According to the concrete stirring device, internal concrete can be conveniently and automatically stirred through the arranged stirring piece, and meanwhile in the stirring process, the arranged stirring piece comprises a rotating seat arranged on one side of the mounting frame and a connecting frame arranged at one end of the rotating seat; a stirring piece is arranged on one side of the rotating frame, so that the stirring blades can be conveniently subjected to reciprocating swing treatment in the stirring process, the stirring efficiency of the device is improved, and the inconvenience that in the prior art, most stirring rods are fixedly arranged in the using process, the stirring rods are difficult to be subjected to reciprocating swing treatment in the stirring process, and the stirring efficiency of the device is affected is reduced.

Description

Technical Field

[0001] The invention belongs to the field of highway engineering, in particular to a concrete mixing device for highway engineering. Background Art

[0002] In the field of highway engineering, the preparation of concrete is a key link in the construction process, and its quality directly affects the quality and durability of the project. The preparation of concrete involves the precise proportion and full mixing of multiple raw materials, including cement, water, sand, gravel and possible additives. The mixing uniformity of these materials is directly related to the final performance of concrete, including strength, durability and workability.

[0003] In the Chinese utility model patent with announcement number CN220579725U, an anti-sedimentation asphalt concrete mixing device is disclosed, which relates to the field of asphalt concrete mixing devices. The asphalt concrete mixing device aims to solve the technical problem that the current asphalt concrete mixing devices have no anti-sedimentation function. The asphalt concrete mixing device includes a feed hopper and a mixing barrel installed below the feed hopper. An outer wall barrel is arranged outside the mixing barrel, heating elements are arranged inside the mixing barrel and the outer wall barrel, a discharge pipe is installed below the mixing barrel, a support foot is installed below the mixing barrel, a vibration element is arranged inside the support foot, and a motor box is installed outside the outer wall barrel. The asphalt concrete mixing device adopts the method of adding an air hammer inside the support foot and adding a heating plate to the outer wall of the mixing barrel.

[0004] With respect to the above-mentioned related technologies, the inventor believes that there are the following defects: the stirring rods are mostly fixed during use, and it is difficult to swing the stirring rods back and forth during the stirring process, thereby affecting the stirring efficiency of the device and causing great inconvenience.

[0005] Therefore, those skilled in the art have proposed a concrete mixing device for highway engineering to solve the problems raised by the background technology. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a concrete mixing device for highway engineering, so as to solve the problem that the stirring rods in the prior art are mostly fixed during use, making it difficult to reciprocate the stirring rods during the stirring process, thereby affecting the stirring efficiency of the device.

[0007] A concrete mixing device for highway engineering, comprising a structural assembly, including a mixing box, a stirring piece arranged in the mixing box, a toggle piece arranged in the stirring piece, and a buckle piece arranged on one side of the stirring piece;

[0008] A material discharging assembly, comprising a material discharging member arranged in the mixing box and a material blocking member arranged in the mixing box;

[0009] A feeding pipe is provided on one side of the mixing box;

[0010] The stirring element includes a mounting frame arranged inside the stirring box, a driving motor arranged on one side of the mounting frame, a rotating rod fixedly mounted on the output end of the driving motor through a coupling, a mounting block arranged outside the rotating rod, a fixing bar arranged on one side of the mounting block, and stirring blades arranged on both sides of the fixing bar;

[0011] The toggle member comprises a rotating seat arranged on one side of the mounting frame and a connecting frame arranged on one end of the rotating seat. A stirring member is arranged on one side of the rotating seat.

[0012] Preferably, the stirring member further comprises a stirring rod arranged at one end of the rotating rod, a spiral stirring bar arranged outside the stirring rod and a rotating disk arranged at one end of the stirring rod.

[0013] Preferably, the toggle member further comprises a connecting block arranged on the outside of the rotating rod, and a bearing rotatably arranged on the inside of the connecting block, wherein the bearing sleeve is arranged on the outside of the rotating rod;

[0014] One end of the connecting frame is connected to the side wall of the driving motor, and the other end is connected to the side wall of the connecting block.

[0015] Preferably, the toggle member also includes a crank connecting rod hingedly arranged on one side of the rotating seat, a connecting plate hingedly arranged on one side of the crank connecting rod, a gear rack arranged on one side of the connecting plate, a first gear and a second gear rotatably arranged on the inner side of the gear rack, and the first gear and the second gear are meshingly arranged.

[0016] Preferably, the shifting member further comprises a worm gear arranged on the outside of the rotating rod, a turbine rotatably arranged on one side of the gear frame, and a linkage shaft fixedly arranged on the inside of the turbine, and the second gear sleeve is arranged on the outside of the linkage shaft.

[0017] Preferably, the radius of the second gear is smaller than the radius of the first gear.

[0018] Preferably, the fastener comprises a mounting groove opened on one side of the stirring plate, a clamping block slidably arranged on one side of the mounting groove and a return spring arranged in the mounting groove, and the clamping block passes through the side wall of the fixing strip and is slidably arranged therewith.

[0019] Preferably, the discharge member comprises a discharge trough arranged on the lower surface of the mixing box.

[0020] Preferably, the material blocking member comprises a baffle plate arranged on the inner bottom wall of the filter box.

[0021] Preferably, the material blocking member further comprises slide grooves opened on the inner walls on both sides of the mixing box, and the baffle is inserted into the slide grooves and slidably arranged therewith.

[0022] Through the above technical solution,

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The stirring piece provided in the present invention can facilitate automatic stirring of internal concrete. At the same time, during the stirring process, the toggle piece provided includes a rotating seat provided on one side of the mounting frame and a connecting frame provided at one end of the rotating seat. A stirring piece is provided on one side of the rotating seat to facilitate reciprocating swing of the stirring blade during the stirring process, thereby improving the stirring efficiency of the device and reducing the inconvenience of the stirring rods in the prior art that are mostly fixed during use, making it difficult to reciprocate and swing the stirring rods during the stirring process, thereby affecting the stirring efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 is a cross-sectional view of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the stirring piece in the present invention;

[0028] Figure 4 for Figure 3 A magnified view of the structure at center;

[0029] Figure 5 It is a structural schematic diagram of the toggle member in the present invention;

[0030] Figure 6 It is a structural schematic diagram of the middle gear rack of the present invention;

[0031] Figure 7 for Figure 6 A magnified view of the structure at B in the middle;

[0032] Figure 8 It is a structural schematic diagram of the card block in the present invention;

[0033] Fig. 9 It is a schematic diagram of the structure of the discharge chute in the present invention.

[0034] In the figure:

[0035] 100, structural components; 101, stirring box; 101a, feeding pipe; 102, stirring member; 102a, mounting frame; 102b, driving motor; 102c, rotating rod; 102d, mounting block; 102e, fixing bar; 102f, stirring blade; 102g, stirring rod; 102h, spiral stirring bar; 103, toggle member; 103a, rotating seat; 103b, connecting frame; 103c, connecting block; 103d, bearing ; 103e, crank connecting rod; 103f, connecting plate; 103g, gear rack; 103h, first gear; 103i, second gear; 103j, worm rod; 103k, turbine; 104, snap-fit ​​part; 104a, mounting groove; 104b, block; 104c, return spring; 200, discharge assembly; 201, discharge part; 201a, discharge trough; 202, blocking part; 202a, baffle; 202b, slide groove. DETAILED DESCRIPTION

[0036] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0037] Embodiment 1: As shown in the attached Figure 1 To Attachment Figure 4 As shown: The present invention provides a concrete mixing device for highway engineering, including a structural component 100, including a mixing box 101, a mixing piece 102 arranged in the mixing box 101, a toggle piece 103 arranged in the mixing piece 102 and a snap piece 104 arranged on one side of the mixing piece 102, a discharge component 200, including a discharge piece 201 arranged in the mixing box 101 and a material blocking piece 202 arranged in the mixing box 101;

[0038] A feeding pipe 101a is provided on one side of the mixing box 101, and the feeding pipe 101a is provided on the side wall of the mixing box 101. A sealing door is rotatably connected to the front end surface of the mixing box 101 through a hinge, and the sealing door can facilitate the real-time disassembly and maintenance of internal parts. Support columns are fixedly installed at the four corners of the lower surface of the mixing box 101, and the support columns are used to support the mixing box 101.

[0039] The stirring element 102 includes a mounting frame 102a arranged on the inner side of the mixing box 101, a driving motor 102b arranged on one side of the mounting frame 102a, a rotating rod 102c fixedly mounted on the output end of the driving motor 102b through a coupling, a mounting block 102d arranged on the outer side of the rotating rod 102c, a fixing bar 102e arranged on one side of the mounting block 102d and stirring blades 102f arranged on both sides of the fixing bar 102e. The installation method is to fix it on the fixing bar 102e through a snap fastener. When the driving motor 102b rotates, it can drive the rotating rod to rotate, thereby driving the stirring blade 102f to rotate, so as to stir and mix the internal concrete.

[0040] Preferably, Figure 2 As shown, the stirring member 102 also includes a stirring rod 102g arranged at one end of the rotating rod 102c, a spiral stirring bar 102h arranged outside the stirring rod 102g and a rotating disk arranged at one end of the stirring rod 102g. At the same time, the stirring rod 102g and the spiral stirring bar 102h can facilitate the stirring and mixing of the concrete inside the mixing box 101 during stirring, thereby improving the mixing effect of the device.

[0041] As can be seen from the above, when in use, the concrete raw materials to be mixed are fed into the mixing box 101 through the feed pipe 101a, and the drive motor 102b and the electric stirring blade 102f are started. The electric stirring blade 102f is used to stir the internal concrete principle. During the rotation of the drive motor 102b, the stirring rod 102g and the spiral stirring bar 102h rotate to stir and stir the concrete inside the mixing box 101, thereby improving the stirring effect of the device.

[0042] Embodiment 2: As shown in the attached Figure 2 To Attachment Figure 7 As shown: This embodiment is basically the same as the previous embodiment, except that the stirring member 102 includes a mounting frame 102a arranged on the inner side of the stirring box 101, a driving motor 102b arranged on one side of the mounting frame 102a, a rotating rod 102c fixedly installed on the output end of the driving motor 102b through a coupling, a mounting block 102d arranged on the outer side of the rotating rod 102c, a fixing bar 102e arranged on one side of the mounting block 102d, and electric stirring blades 102f arranged on both sides of the fixing bar 102e.

[0043] Preferably, Figure 3As shown, the toggle member 103 includes a rotating seat 103a arranged on one side of the mounting frame 102a, a connecting frame 103b arranged at one end of the rotating seat 103a, a connecting block 103c arranged on the outside of the rotating rod 102c, and a bearing 103d rotatably arranged on the inside of the connecting block 103c, the bearing 103d is sleeved on the outside of the rotating rod 102c, and the crank connecting rod 103e is connected to the rotating seat 103a in an articulated manner to form a swingable crank structure. The connecting plate 103f is hinged to the other end of the crank connecting rod 103e to transmit the swing of the crank connecting rod 103e. The connecting frame 103b is fixedly connected to the other end of the rotating seat 103a to support the swing of the crank connecting rod 103e;

[0044] One end of the connecting frame 103b is connected to the side wall of the driving motor 102b, and the other end is connected to the side wall of the connecting block 103c.

[0045] Further, such as Figure 5-Figure 6 As shown, the toggle member 103 also includes a crank connecting rod 103e hingedly arranged on one side of the rotating seat 103a, a connecting plate 103f hingedly arranged on one side of the crank connecting rod 103e, a gear frame 103g arranged on one side of the connecting plate 103f, a first gear 103h and a second gear 103i rotatably arranged inside the gear frame 103g, the first gear 103h and the second gear 103i are meshed, and the first gear 103h can be driven to rotate when the second gear 103i rotates, and a transmission mechanism is provided between the linkage shaft inside the turbine 103k and the second gear 103i, and the transmission mechanism can transmit the rotational motion of the linkage shaft to the second gear 103i. The second gear 103i is meshed with the first gear 103h, and through the principle of gear transmission, the rotation of the second gear 103i drives the first gear 103h to rotate. The first gear 103h is connected to the connecting plate 103f via a bearing, and the rotation of the first gear 103h is transmitted to the connecting plate 103f via the bearing, thereby realizing the rotation of the connecting plate 103f.

[0046] Preferably, the toggle member 103 also includes a worm rod 103j arranged on the outside of the rotating rod 102c, a turbine 103k rotatably arranged on one side of the gear frame 103g, and a linkage shaft fixedly arranged on the inner side of the turbine 103k. During the rotation of the driving motor 102b, the rotating rod 102c is driven to rotate, and the rotating rod 102c can drive the worm rod 103j to rotate during the rotation process. The rotation of the worm rod 103j drives the turbine 103k to rotate. Since a linkage shaft is arranged inside the turbine 103k, the second gear 103i is driven to rotate during the rotation of the linkage shaft, thereby driving the first gear 103h to rotate. During the rotation of the first gear 103h, the connecting gear 103i is driven to rotate. The plate 103f rotates, and at this time, the connecting plate 103f, the crank connecting rod 103e and the connecting frame 103b form a crank structure, one end of the crank connecting rod 103e is rotatably set on the rotating seat 103a, and the connecting frame 103b is set at the other end of the rotating seat 103a. At this time, when the connecting plate 103f rotates, the above-mentioned setting drives the toggle member 103 as a whole to swing back and forth at a small angle left and right, and at the same time, during the swinging process, it cooperates with the electric stirring piece 102f, the stirring rod 102g and the spiral stirring bar 102h to perform a reciprocating swing to the internal concrete during stirring, thereby significantly improving the efficiency of concrete mixing.

[0047] The second gear 103i is sleeved on the outside of the linkage shaft, and the radius of the second gear 103i is smaller than the radius of the first gear 103h. This arrangement can reduce the swing speed of the device and improve the stability of the device.

[0048] As can be seen from the above, during use, when the drive motor 102b is started to rotate, the set toggle member 103 drives the electric stirring blade 102f, the stirring rod 102g and the spiral stirring bar 102h to swing back and forth at a small angle left and right inside the mixing box 101. At the same time, during the swinging process, the electric stirring blade 102f, the stirring rod 102g and the spiral stirring bar 102h cooperate to perform reciprocating swinging and shifting processing on the internal concrete during stirring, thereby improving the mixing efficiency of the device for concrete. At the same time, the radius of the second gear 103i is smaller than the radius of the first gear 103h. Through this setting, the swinging speed of the device can be reduced and the stability of the device can be improved.

[0049] Embodiment 3: As shown in the attached Figure 1 To Attachment Fig. 9 As shown: Based on the first embodiment, Figure 7-Figure 8As shown, the fastener 104 includes a mounting groove 104a opened on one side of the electric stirring blade 102f, a block 104b slidably set on one side of the mounting groove 104a, and a reset spring 104c set in the mounting groove 104a, the two ends of the reset spring 104c are respectively connected to the side wall of the block 104b and the inner wall of the mounting groove 104a, the reset spring 104c is used to reset the block 104b, the block 104b passes through the side wall of the fixing strip 102e and is slidably set therewith, the side wall of the fixing strip 102e is opened with a through hole, and the design of the fastener 104 is to realize the rapid fixing and disassembly of the electric stirring blade 102f. When the electric stirring blade 102f is inserted into the through hole of the fixing strip 102e, the block 104b slides outward under the action of the return spring 104c and locks the electric stirring blade 102f to prevent it from falling off. When disassembling, the block 104b is pressed to overcome the elastic force of the return spring 104c and move inward, thereby releasing the electric stirring blade 102f. During insertion, when the electric stirring blade 102f is inserted into the internal through hole of the fixing strip 102e, the block 104b is driven by the rebound force of the return spring 104c to slide outward and extend out of the through hole, thereby realizing the rapid fixed installation of the electric stirring blade 102f. When it needs to be disassembled, the electric stirring blade 102f can be directly pulled out after pressing the block 104b to realize the rapid disassembly and maintenance operation of the electric stirring blade 102f. Its installation and disassembly are relatively convenient, and there is no need to use tools such as screws for installation and disassembly, which greatly improves the maintenance efficiency of the electric stirring blade 102f in the device.

[0050] Furthermore, the discharge member 201 includes a discharge trough 201a arranged on the lower surface of the mixing box 101. By setting the discharge trough 201a, the mixed concrete can be automatically discharged. The blocking member 202 includes a baffle 202a arranged on the bottom wall of the filter box. The baffle 202a can be used to block the concrete during mixing. After the mixing is completed, the baffle 202a is pulled out for discharge. The blocking member 202 also includes a slide groove 202b opened on the inner wall on both sides of the mixing box 101. The baffle 202a is inserted into the slide groove 202b and slidably set therewith. The slide groove 202b can facilitate the baffle 202a to be quickly pulled out and installed, thereby improving its installation and disassembly efficiency.

[0051] As can be seen from the above, during stirring, the sealed door is opened and the electric stirring blade 102f is inserted into one side of the fixed strip 102e in the box. When the electric stirring blade 102f is inserted into the internal through hole of the fixed strip 102e, the block 104b is driven by the rebound force of the return spring 104c to slide outward and extend out of the through hole, thereby realizing the rapid fixed installation of the electric stirring blade 102f. After the installation is completed, stirring is started. After the concrete is stirred, it can be discharged directly through the discharge chute 201a. After the stirring is completed, the baffle 202a is pulled out, and the concrete is discharged through the discharge chute 201a. When it needs to be disassembled, the electric stirring blade 102f can be directly pulled out after pressing the block 104b to realize the rapid disassembly and maintenance operation of the electric stirring blade 102f.

[0052] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0053] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0057] In the drawings of the embodiments disclosed in the present invention, only the structures involved in the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0058] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A concrete mixing device for highway engineering, characterized in that: include: A structural assembly (100) comprises a stirring box (101), a stirring member (102) disposed in the stirring box (101), a toggle member (103) disposed in the stirring member (102), and a snap member (104) disposed on one side of the stirring member (102); A material discharging assembly (200) comprises a material discharging member (201) arranged in the mixing box (101) and a material blocking member (202) arranged in the mixing box (101); A feeding pipe (101a) is provided on one side of the stirring box (101); The stirring member (102) comprises a mounting frame (102a) arranged inside the stirring box (101), a driving motor (102b) arranged on one side of the mounting frame (102a), a rotating rod (102c) fixedly mounted on the output end of the driving motor (102b) via a coupling, a mounting block (102d) arranged outside the rotating rod (102c), a fixing strip (102e) arranged on one side of the fixing strip (102d), and stirring blades (102f) arranged on both sides of the fixing strip (102e); The toggle member (103) comprises a rotating seat (103a) arranged on one side of the mounting frame (102a) and a connecting frame (103b) arranged on one end of the rotating seat (103a); a stirring member (102) is arranged on one side of the rotating seat (103a).

2. A concrete mixing device for highway engineering as claimed in claim 1, characterized in that: The stirring member (102) further comprises a stirring rod (102g) arranged at one end of the rotating rod (102c), a spiral stirring bar (102h) arranged outside the stirring rod (102g), and a rotating disk arranged at one end of the stirring rod (102g).

3. A concrete mixing device for highway engineering as claimed in claim 2, characterized in that: The toggle member (103) further comprises a connecting block (103c) arranged on the outside of the rotating rod (102c), and a bearing (103d) rotatably arranged on the inside of the connecting block (103c), wherein the bearing (103d) is sleeved on the outside of the rotating rod (102c); One end of the connecting frame (103b) is connected to the side wall of the driving motor (102b), and the other end is connected to the side wall of the connecting block (103c).

4. A concrete mixing device for highway engineering as claimed in claim 3, characterized in that: The shifting member (103) further comprises a crank connecting rod (103e) hingedly arranged on one side of the rotating seat (103a), a connecting plate (103f) hingedly arranged on one side of the crank connecting rod (103e), a gear rack (103g) arranged on one side of the connecting plate (103f), a first gear (103h) and a second gear (103i) rotatably arranged on the inner side of the gear rack (103g), and the first gear (103h) and the second gear (103i) are meshedly arranged.

5. A concrete mixing device for highway engineering as claimed in claim 4, characterized in that: The shifting member (103) further comprises a worm gear (103j) arranged outside the rotating rod (102c), a turbine (103k) rotatably arranged on one side of the gear frame (103g), and a linkage shaft fixedly arranged inside the turbine (103k); the second gear (103i) is sleeved on the outside of the linkage shaft.

6. A concrete mixing device for highway engineering as claimed in claim 5, characterized in that: The radius of the second gear (103i) is smaller than the radius of the first gear (103h).

7. A concrete mixing device for highway engineering as claimed in claim 6, characterized in that: The fastener (104) comprises a mounting groove (104a) opened on one side of the stirring blade (102f), a clamping block (104b) slidably arranged on one side of the mounting groove (104a), and a return spring (104c) arranged in the mounting groove (104a); the clamping block (104b) penetrates the side wall of the fixing strip (102e) and is slidably arranged therewith.

8. A concrete mixing device for highway engineering as claimed in claim 1, characterized in that: The discharge member (201) comprises a discharge trough (201a) arranged on the lower surface of the mixing box (101).

9. A concrete mixing device for highway engineering as claimed in claim 8, characterized in that: The material blocking member (202) comprises a baffle (202a) arranged on the bottom wall of the filter box.

10. A concrete mixing device for highway engineering as claimed in claim 9, characterized in that: The material blocking member (202) further comprises sliding grooves (202b) provided on the inner walls of both sides of the mixing box (101), and the baffle (202a) is inserted into the sliding grooves (202b) and slidably arranged therewith.

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