Trolley type fertilizer box device for tobacco seedling fertilization

Abstract

The utility model belongs to the technical field of tobacco planting and fertilization, and particularly relates to a trolley type fertilizer box device for tobacco seedling fertilization, which comprises a trolley frame pushed to walk in a tobacco seedling planting field, and support plates for supporting and bearing a fertilizer box body are welded at the top ends of two longitudinal beams. A detachable chassis is detachably clamped to the bottom end of the fertilizer box body, a discharging pipe penetrates through the outer wall of the detachable chassis, a discharging opening is formed in the inner bottom wall of the detachable chassis, a rotating shaft is connected between the two wheels, and the peripheral side of the supporting cross beam is sleeved with a sliding sleeve. A longitudinal vertical rod is rotatably mounted on one side of the slidable sleeve, bevel gear assemblies meshed with the longitudinal vertical rod and the rotating shaft are arranged between the bottom end of the longitudinal vertical rod and the rotating shaft, a fertilizer discharging and dispersing disc is mounted at the top end of the longitudinal vertical rod, and a vertical plate piece is connected to one end of the slidable sleeve through an extension rod; a movable discharging sliding plate is hinged to the top end of the vertical plate piece.

Description

Technical Field

[0001] The utility model belongs to the technical field of tobacco planting and fertilization, in particular to a wheelbarrow type fertilizer box device for fertilizing tobacco seedlings. Background Art

[0002] In the process of tobacco seedling planting, using a wheelbarrow to spread fertilizer boxes can be an effective and labor-saving way, especially when it comes to large-scale planting and the need to carry a large amount of fertilizer. Compared with manual shoulder-carrying and hand-scattering, the wheelbarrow can carry more fertilizer at a time when using the fertilizer box, reducing the number of round trips to get fertilizer, thereby improving work efficiency. After the fertilizer box of the current fertilizer cart is used, fertilizer particles or dust may remain in the fertilizer box. Since the current fertilizer box is generally an integrated structure and has a deep depth, it is difficult for people to clean the bottom wall of the fertilizer box manually, resulting in accumulation of residual fertilizer particles or dust, which may reduce the efficiency of the next use.

[0003] After searching, the existing Chinese patent publication number: CN219628327U is a tobacco field fertilization cart, including a frame, the bottom front end of the frame is connected to the wheel mounting frame, the wheel mounting frame is connected to the roller; the bottom rear end of the frame is connected to at least two supporting legs; the top of the frame is connected to a funnel, the outer wall of the bottom of the funnel is inclined downward and connected to a fertilizer pipe, the fertilizer pipe is connected to the inside of the funnel, a fertilizer speed adjustment port is provided in the middle of the fertilizer pipe, and a fertilizer amount adjustment device is provided in the fertilizer speed adjustment port; push rods are respectively connected to the left and right sides of the rear of the frame.

[0004] The cited patent document also has the same problem. After the fertilizer box of the fertilizer cart is used, fertilizer particles or dust may remain in the fertilizer box. Since the current fertilizer boxes are generally one-piece structures and deep, it is difficult to clean the bottom wall of the fertilizer box manually, resulting in accumulation of residual fertilizer particles or dust, which may reduce the efficiency of the next use. Utility Model Content

[0005] The utility model aims to provide a trolley-type fertilizer box device for fertilizing tobacco seedlings, so as to solve the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wheelbarrow-type fertilizer box device for fertilizing tobacco seedlings, comprising a wheelbarrow frame for being pushed and walked in a tobacco seedling planting site, two wheels installed at the bottom of the wheelbarrow frame, and a supporting crossbeam welded between the inner walls of one end of the wheelbarrow frame, longitudinal beams are welded at both ends of the supporting crossbeam, and support plates for supporting a fertilizer box body are welded at the top ends of the two longitudinal beams;

[0007] The bottom end of the fertilizer box is detachably connected with a detachable chassis, the outer wall of the detachable chassis is penetrated by a discharge pipe, and a discharge port is opened on the inner bottom wall of the detachable chassis;

[0008] A rotating shaft is connected between the two wheels, a slidable sleeve is sleeved on the peripheral side of the supporting crossbeam, a longitudinal vertical rod is rotatably mounted on one side of the slidable sleeve, and a bevel gear assembly meshing with each other is arranged between the bottom end of the longitudinal vertical rod and the rotating shaft;

[0009] A fertilizer dispersing plate is installed at the top of the longitudinal upright pole, one end of the slidable sleeve is connected to a vertical plate member through an extension rod, and a movable dispensing slide plate is hinged at the top of the vertical plate member.

[0010] Preferably, an extension ear plate is welded to an outer wall of one side of the slidable sleeve, a bearing component is embedded in the free end of the extension ear plate, and the longitudinal upright rod is interference fit with the inner ring of the bearing component.

[0011] Preferably, the bevel gear assembly includes a driving bevel gear which is interference-fitted at a middle position of a circumferential side of the rotating shaft and a driven bevel gear which is interference-fitted at a bottom end of the longitudinal vertical rod.

[0012] Preferably, the outer wall on the other side of the slidable sleeve is dynamically locked with the supporting crossbeam by a locking bolt, and one end of the extension rod is welded to the outer wall of the slidable sleeve.

[0013] Preferably, the top of the vertical plate is provided with a hinge notch, and the upper bottom wall of the movable unloading slide is welded with a hinge block, which is placed in the hinge notch and is hinged together by a hinge pin.

[0014] Preferably, the lower bottom wall of the movable unloading slide is hinged with an elevation support rod;

[0015] The outer wall of the vertical plate is longitudinally and equidistantly provided with a plurality of limit plug-in interfaces for the free ends of the elevation support rods to be plugged into.

[0016] Preferably, in this solution, the outer wall of the free end of the elevation support rod is symmetrically integrally formed with a limiting protrusion abutting against the outer side of the limiting plug interface.

[0017] Preferably, the fertilizer box and the detachable chassis are welded with connecting ear plates on the outer walls at opposite ends, and two upper and lower adjacent connecting ear plates are connected by bolts.

[0018] Preferably, the top surface of the detachable chassis is integrally connected with a sealed inner frame plate, and the bottom surface of the fertilizer box body is provided with a sealed inner groove for plugging the sealed inner frame plate.

[0019] Compared with the prior art, the technical effects and advantages of the utility model are as follows:

[0020] The trolley-type fertilizer box device for fertilizing tobacco seedlings has a detachable chassis and a sealed inner frame plate, which greatly facilitates the cleaning work after fertilization, reduces the pollution risk caused by residual fertilizer, and ensures the efficiency and sanitary conditions of the next use. The detachable chassis is designed to facilitate cleaning and maintenance. It is disassembled separately after fertilization. This design solves the problem that it is difficult to thoroughly clean the residual fertilizer in the traditional integrated fertilizer box. By disassembling and cleaning the detachable chassis, fertilizer accumulation can be effectively avoided, and fertilization efficiency and crop health can be maintained;

[0021] When it is necessary to use the mobile feeding slide for fixed-point fertilization, loosen the locking bolt and pull the slidable sleeve to move on the supporting crossbeam to separate the driven bevel gear and the active bevel gear. Under the extension of the extension rod, the vertical plate is driven close to the active bevel gear, so that the top end of the mobile feeding slide is located directly below the feeding port, so that the fertilizer can be fixed-point fertilized to the required position along the mobile feeding slide. The flexible positioning mechanism increases the flexibility of the fertilization operation, allowing the operator to adjust whether to use the mobile feeding slide or the fertilizer feeding dispersion disk for fertilization according to actual conditions, thereby improving the fertilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of the utility model;

[0024] Figure 2 For this utility model Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 3 It is a schematic diagram of the structure of the installation state of the mobile feeding slide plate and the fertilizer feeding dispersion plate of the utility model;

[0026] Figure 4 It is a structural schematic diagram of the movable unloading slide plate and the vertical plate member of the utility model in the separated state;

[0027] Figure 5 It is a schematic structural diagram of the fertilizer box and the detachable chassis of the utility model in a disassembled state.

[0028] Description of reference numerals:

[0029] In the figure: 1. trolley frame; 2. wheels; 3. supporting crossbeam; 4. supporting plate; 5. longitudinal beam; 6. fertilizer box; 7. rotating shaft; 8. mobile unloading slide; 9. driving bevel gear; 10. driven bevel gear;

[0030] 11. Longitudinal vertical rod; 12. Slidable sleeve; 13. Extension ear plate; 14. Vertical plate member; 15. Bearing member; 16. Extension rod; 17. Fertilizer feeding and dispersing plate; 18. Dispersing fins; 19. Locking bolt; 20. Limiting plug interface;

[0031] 21. Articulated notch; 22. Articulated block; 23. Articulated pin; 24. Elevation support rod; 25. Limiting protrusion; 26. Removable chassis; 27. Sealed inner frame plate; 28. Connecting ear plate; 29. ​​Discharge pipe; 30. Feeding port. DETAILED DESCRIPTION

[0032] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0033] Unless otherwise defined, the directions of up, down, left, right, front, back, inside and outside involved in this document are based on the directions of up, down, left, right, front, back, inside and outside in the figures shown in the present utility model, and are explained here together.

[0034] This embodiment provides Figures 1 to 5 The shown embodiment is a wheelbarrow-type fertilizer box device for fertilizing tobacco seedlings, comprising a wheelbarrow frame 1 for being pushed in a tobacco seedling planting site, two wheels 2 installed at the bottom end of the wheelbarrow frame 1, and a supporting crossbeam 3 welded between the inner walls of the wheelbarrow frame 1 at one end close to the wheel 2, longitudinal beams 5 are welded at both ends of the supporting crossbeam 3, supporting plates 4 for supporting a fertilizer box 6 are welded at the top ends of the two longitudinal beams 5, and a rotating shaft 7 is connected between the two wheels 2.

[0035] In this embodiment, the trolley frame 1 is made of a strong and durable material, such as steel or aluminum alloy, to bear the weight of a full load of fertilizer. The support beam 3 is located at the bottom of the frame and is firmly fixed by welding to provide stable support for the entire device. The longitudinal beams 5 at both ends further enhance the stability of the overall structure and provide a stable installation platform for the fertilizer box 6 through the support plate 4.

[0036] In this embodiment, the rotating shaft 7 is connected to the driven bevel gear on the longitudinal upright pole, and the rotating shaft is driven to rotate by the rolling of the wheel, so that when the cart is pushed forward by manpower, energy is converted into power to drive the rotating shaft 7 to rotate, thereby improving the degree of automation and uniform dispersion of the fertilization operation.

[0037] In this embodiment, the bottom end of the fertilizer box 6 is detachably connected to a detachable chassis 26, the outer wall of the detachable chassis 26 is penetrated by a discharge pipe 29 and a discharge port 30 is provided on the inner bottom wall of the detachable chassis 26, connecting ear plates 28 are welded to the outer walls of the fertilizer box 6 and the detachable chassis 26 at opposite ends, and the two upper and lower adjacent connecting ear plates 28 are connected by bolts, the top surface of the detachable chassis 26 is integrally connected to a sealing inner frame plate 27, and the bottom surface of the fertilizer box 6 is provided with a sealing inner groove for plugging the sealing inner frame plate 27.

[0038] In this embodiment, the detachable chassis 26 is designed to facilitate cleaning and maintenance. It is installed at the bottom of the fertilizer box and connected to the box by a snap-on method. It can be removed separately after the fertilization operation. This design solves the problem that it is difficult to thoroughly clean the residual fertilizer in the traditional integrated fertilizer box. By disassembling and cleaning the detachable chassis 26, fertilizer accumulation can be effectively avoided, and the fertilization efficiency and crop health can be maintained. The sealed inner frame plate 27 is a component integrally connected to the top surface of the detachable chassis 26, and is designed to be tightly docked with a specific groove at the bottom of the fertilizer box 6 to form a closed space. Through this sealing design, it is ensured that the fertilizer will not leak or scatter during transportation and fertilization, reduce fertilizer waste, and improve the accuracy and efficiency of fertilization.

[0039] In this embodiment, a manual valve is provided inside the discharge pipe 29. When the residual fertilizer in the fertilizer box 6 needs to be emptied, the discharge pipe 29 can quickly discharge the fertilizer, simplifying the emptying process. At the same time, it avoids the inconvenience of direct contact with the fertilizer when disassembling the detachable chassis 26, thereby improving the hygiene and convenience of the operation.

[0040] In this embodiment, a detachable chassis 26 is used at the bottom of the fertilizer box 6. The detachable chassis 26 is connected to the fertilizer box 6 by a snap-on method, which is convenient for the user to easily disassemble and thoroughly clean after fertilizing, effectively solving the problem of fertilizer residue. The discharge pipe 29 on the detachable chassis 26 ensures that the remaining fertilizer is discharged smoothly, and the design of the discharge port 30 facilitates the control of the outflow of fertilizer.

[0041] In this embodiment, a slidable sleeve 12 is sleeved on the circumference of the supporting beam 3, a longitudinal upright rod 11 is rotatably installed on one side of the slidable sleeve 12, a bevel gear assembly meshing together is arranged between the bottom end of the longitudinal upright rod 11 and the rotating shaft 7, an extension ear plate 13 is welded to the outer wall of one side of the slidable sleeve 12, a bearing member 15 is embedded in the free end of the extension ear plate 13, the longitudinal upright rod 11 and the inner ring of the bearing member 15 are interference fit, and the bevel gear assembly includes an active bevel gear 9 interference fit in the middle position of the circumference of the rotating shaft 7 and a driven bevel gear 10 interference fit at the bottom end of the longitudinal upright rod 11.

[0042] In this embodiment, the introduction of the slidable sleeve 12 enables the longitudinal upright 11 to slide along the sleeve, and the driven bevel gear 10 cooperates with the active bevel gear 9 and is installed at the bottom end of the longitudinal upright 11. Through the meshing transmission of the two, the power is transmitted to the longitudinal upright 11, thereby realizing the effective transmission of the rotating power of the shaft, driving the longitudinal upright to rotate, further activating the operation of the fertilizer feeding and dispersion disk, and ensuring the uniform dispersion of the fertilizer. The slidable sleeve 12 is sleeved around the supporting crossbeam 3, and the longitudinal upright 11 is slidably positioned through it to realize the adjustment of the position of the mobile feeding slide 8, providing a flexible positioning mechanism for the feeding slide, allowing the operator to adjust the feeding height and direction according to actual conditions, increasing the flexibility of the fertilization operation, and allowing the operator to adjust whether to use the mobile feeding slide 8 or the fertilizer feeding and dispersion disk 17 for fertilization according to actual conditions.

[0043] In this embodiment, a fertilizer dispersing plate 17 is installed at the top of the longitudinal vertical rod 11, and a plurality of dispersing fins 18 for breaking up the falling fertilizer are installed in a circular array on the top surface of the fertilizer dispersing plate 17. The fertilizer can be effectively broken up when it falls to ensure uniform fertilization. One end of the sliding sleeve 12 is connected to the vertical plate 14 through an extension rod 16, and a movable dispersing slide plate 8 is hinged on the top of the vertical plate 14. The outer wall of the other side of the sliding sleeve 12 is dynamically locked with the supporting beam 3 through a locking bolt 19. The locking bolt 19 is used to adjust and fix the position of the sleeve to ensure stability and safety during operation. One end of the extension rod 16 is welded to the outer wall of the sliding sleeve 12.

[0044] In this embodiment, the movable unloading slide plate 8 is installed on the top of the vertical plate member. The angle can be adjusted by hinge to control the falling direction and range of the fertilizer, providing flexible fertilization control. The fertilization position can be accurately adjusted according to the tobacco planting row spacing and crop growth conditions, avoiding waste and promoting uniform nutrient absorption by crops.

[0045] In this embodiment, the fertilizer dispersing plate 17 is installed at the top of the longitudinal pole. It rotates to break up the concentrated falling fertilizer to achieve uniform distribution, thereby ensuring the uniformity and coverage of the fertilizer when it falls, avoiding local excess or deficiency, and improving the accuracy of fertilization. The dispersing fins 18 further enhance the dispersion effect of the fertilizer, making the falling fertilizer more uniform and delicate, which is conducive to the comprehensive absorption by the crop roots.

[0046] In this embodiment, a hinge notch 21 is provided at the top of the vertical plate 14, and a hinge block 22 is welded on the upper bottom wall of the movable unloading slide plate 8. The hinge block 22 is placed in the hinge notch 21 and is hinged together by a hinge pin 23. The lower bottom wall of the movable unloading slide plate 8 is hinged with an elevation support rod 24. The outer wall of the vertical plate 14 is longitudinally equidistantly provided with a plurality of limit plug-in interfaces 20 for the free end of the elevation support rod 24 to be plugged in. The limit plug-in interface 20 is used to receive the free end of the elevation support rod to limit its movement range, thereby ensuring that the mobile unloading slide plate can still be stably supported at different angles, preventing the slide plate from over-turning, and improving operation safety; the outer wall of the free end of the elevation support rod 24 is symmetrically integrally formed with a limit protrusion 25 that abuts against the outside of the limit plug-in interface 20. The limit protrusion 25 ensures that the elevation support rod 24 is accurately positioned when inserted into the limit plug-in interface 20, avoids excessive insertion or falling off, and enhances the stability and safety of the overall structure.

[0047] In this embodiment, the design of the elevation support rod 24 allows the user to adjust the inclination angle of the movable unloading slide 8 according to actual needs, and the stable positioning of the support rod is ensured by the cooperation between the limit plug interface 20 and the limit protrusion 25.

[0048] Working principle:

[0049] In the trolley-type fertilizer box device for fertilizing tobacco seedlings, first, the operator loads fertilizer into the fertilizer box body 6. The detachable chassis 26 at the bottom of the fertilizer box body 6 ensures the stability of fertilizer loading and the convenience of subsequent cleaning. The operator pushes the trolley frame 1, and the rotation shaft 7 is driven to rotate through the rolling of the wheels 2. The energy of the rotation of the rotation shaft is transmitted to the longitudinal upright pole 11 through the driving bevel gear 9 and the driven bevel gear 10 of the bevel gear assembly, so that the longitudinal upright pole 11 and the fertilizer dispersing disk 17 at the top thereof start to rotate, and the dispersing fins 18 on the dispersing disk disperse the concentrated fertilizer during the rotation process to form uniform fertilization.

[0050] When the mobile unloading slide plate 8 is needed for fixed-point fertilization, the locking bolt 19 is loosened, and the slidable sleeve 12 is pulled to move on the supporting crossbeam 3, so that the driven bevel gear 10 and the active bevel gear 9 are separated, and the vertical plate 14 is driven close to the active bevel gear 9 under the extension of the extension rod 16, so that the top end of the mobile unloading slide plate 8 is located directly below the unloading port 30, so that the fertilizer can be fixed-point fertilized to the desired position along the mobile unloading slide plate 8;

[0051] The movable unloading slide 8 can adjust the unloading angle and position as needed through the connection between the vertical plate 14 and the hinge pin 23 to ensure that the fertilizer is evenly covered around the tobacco seedlings. By adjusting the elevation support rod 24 and inserting it into the limit plug interface 20, the different working angles of the movable unloading slide can be stabilized. The cooperation between the hinge block 22 and the hinge notch 21 ensures that the slide can move up and down flexibly without losing stability.

[0052] After the fertilization operation is completed, the detachable chassis 26 can be easily disassembled for thorough cleaning, thus avoiding the problem that the traditional integrated fertilizer box is difficult to clean. The plug-in design of the sealed inner frame plate 27 further enhances the sealing and the convenience of cleaning.

[0053] It should be noted that, in this article, relational terms such as one and two are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A trolley-type fertilizer box device for fertilizing tobacco seedlings, comprising a trolley frame (1) for being pushed on a tobacco seedling planting site, two wheels (2) mounted at the bottom of the trolley frame (1), and a supporting beam (3) welded between the inner walls of one end of the trolley frame (1) close to the wheels (2), characterized in that: Longitudinal beams (5) are welded to both ends of the supporting cross beam (3), and supporting plates (4) for supporting the fertilizer box (6) are welded to the top ends of the two longitudinal beams (5); The bottom end of the fertilizer box (6) is detachably connected to a detachable chassis (26), the outer wall of the detachable chassis (26) is penetrated by a discharge pipe (29), and a discharge port (30) is provided on the inner bottom wall of the detachable chassis (26); A rotating shaft (7) is connected between the two wheels (2); a slidable sleeve (12) is sleeved on the circumference of the supporting crossbeam (3); a longitudinal vertical rod (11) is rotatably mounted on one side of the slidable sleeve (12); and a meshing bevel gear assembly is provided between the bottom end of the longitudinal vertical rod (11) and the rotating shaft (7); A fertilizer dispersing plate (17) is installed at the top of the longitudinal upright rod (11), one end of the slidable sleeve (12) is connected to a vertical plate (14) via an extension rod (16), and a movable discharging slide plate (8) is hinged at the top of the vertical plate (14).

2. A trolley-type fertilizer box device for fertilizing tobacco seedlings according to claim 1, characterized in that: An extension ear plate (13) is welded to the outer wall of one side of the slidable sleeve (12), a bearing component (15) is embedded in the free end of the extension ear plate (13), and the longitudinal upright rod (11) is interference fit with the inner ring of the bearing component (15).

3. A trolley-type fertilizer box device for fertilizing tobacco seedlings according to claim 2, characterized in that: The bevel gear assembly comprises a driving bevel gear (9) which is interference-fitted at the middle position of the circumference of the rotating shaft (7) and a driven bevel gear (10) which is interference-fitted at the bottom end of the longitudinal upright rod (11).

4. A trolley-type fertilizer box device for fertilizing tobacco seedlings according to claim 3, characterized in that: The outer wall of the other side of the slidable sleeve (12) is dynamically locked with the supporting beam (3) through a locking bolt (19), and one end of the extension rod (16) is welded to the outer wall of the slidable sleeve (12).

5. A trolley-type fertilizer box device for fertilizing tobacco seedlings according to claim 4, characterized in that: The top end of the vertical plate (14) is provided with a hinge notch (21), and the upper bottom wall of the movable unloading slide plate (8) is welded with a hinge block (22), and the hinge block (22) is placed in the hinge notch (21) and is hinged together via a hinge pin (23).

6. A trolley-type fertilizer box device for fertilizing tobacco seedlings according to claim 5, characterized in that: The lower bottom wall of the movable unloading slide plate (8) is hinged with an elevation support rod (24); The outer wall of the vertical plate (14) is longitudinally and equidistantly provided with a plurality of limit insertion ports (20) for the free ends of the elevation support rods (24) to be inserted into.

7. A trolley-type fertilizer box device for fertilizing tobacco seedlings according to claim 6, characterized in that: The outer wall of the free end of the elevation support rod (24) is symmetrically integrally formed with a limiting protrusion (25) that abuts against the outside of the limiting plug interface (20).

8. A trolley-type fertilizer box device for fertilizing tobacco seedlings according to claim 7, characterized in that: The fertilizer box (6) and the detachable chassis (26) are both welded with connecting ear plates (28) on the outer walls at opposite ends, and two upper and lower adjacent connecting ear plates (28) are connected by bolts.

9. A trolley-type fertilizer box device for fertilizing tobacco seedlings according to claim 8, characterized in that: The top surface of the detachable chassis (26) is integrally connected with a sealing inner frame plate (27), and the bottom surface of the fertilizer box (6) is provided with a sealing inner groove for plugging the sealing inner frame plate (27).

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