Hinge elbow connecting structure and pumping equipment

Abstract

The utility model provides a hinge elbow connecting structure and pumping equipment, the hinge elbow connecting structure comprises a hopper assembly, a hinge elbow, a locking assembly and a connecting assembly, the connecting assembly is connected with the hinge elbow and the hopper assembly, the hinge elbow can rotate around the connecting assembly to realize the closing and opening of the hinge elbow and the hopper assembly, and the locking assembly is connected with the hopper assembly. The connecting assembly comprises a first rod and a second rod, one end of the first rod is hinged to one end of the second rod through a first rotating shaft, the other end of the first rod is hinged to the hopper assembly through a second rotating shaft, and the other end of the second rod is hinged to the hinge elbow through a third rotating shaft; one end of each fastening piece is fixed to the hopper assembly, and when the hinge bent pipe and the hopper assembly are closed, the other ends of the fastening pieces are inserted into the hinge bent pipe, so that the hinge bent pipe and the hopper assembly are locked. According to the hinge elbow connecting structure, the needed axial space is small under the condition that tight connection is guaranteed, and maintenance operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete pumping equipment, and particularly relates to a hinge elbow connection structure and a pumping equipment. Background Art

[0002] For the concrete pumping equipment widely used in the market at present, such as concrete pump trucks, etc., the hinge elbow is installed at the discharge port of the pump truck to change the flow direction of the concrete. After each construction of the concrete pump truck, it is necessary to open the discharge port to wash the residual concrete in the pipeline, and the opening frequency is very high. Therefore, the hinge elbow should be designed to be convenient to open and close in terms of structure to reduce the daily maintenance difficulty of users.

[0003] In the locking connection structure between the hinge elbow of the prior art and the hopper, the left side of the hinge elbow is locked with the hopper through the cooperation of a pin shaft and a wedge block, and the right side of the hinge elbow is locked with the hopper through the cooperation of bolts and nuts. In this structure, both the left and right sides of the hinge elbow can lock the hinge elbow and the hopper. The right side knuckle bolt is locked by a nut, and the required axial space is large, affecting the overall layout size of the machine; during the construction process of the equipment, the hinge elbow is affected by the pumping frequency and opens and closes frequently, and there is a possibility that the knuckle bolt and the nut are loose, and it is necessary to check and tighten them frequently. However, the space here is small, the operable space is small, and the maintainability is poor. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a hinge elbow connection structure and a pumping equipment to solve the problems that the required axial space is large after the hinge elbow connection is locked, which affects the overall layout of the machine, and the maintenance operability is poor.

[0005] The utility model provides a hinge elbow connection structure, which includes a hopper assembly, a hinge elbow, a locking assembly and a connection assembly. The connection assembly connects the hinge elbow and the hopper assembly. The hinge elbow can rotate around the connection assembly to realize the closing and opening of the hinge elbow and the hopper assembly. The connection assembly includes a first rod and a second rod. One end of the first rod is hinged to one end of the second rod through a first rotating shaft. The other end of the first rod is hinged to the hopper assembly through a second rotating shaft. The other end of the second rod is hinged to the hinge elbow through a third rotating shaft. The locking assembly includes a plurality of fasteners. One ends of the plurality of fasteners are fixed to the hopper assembly. When the hinge elbow and the hopper assembly are closed, the other ends of the plurality of fasteners are inserted into the hinge elbow to lock the hinge elbow and the hopper assembly.

[0006] In an embodiment of the utility model, when the hinge elbow and the hopper assembly are closed, an included angle is formed between the first rod and the second rod, and the included angle is 20° - 160°.

[0007] In an embodiment of the present utility model, one end of the hinge elbow is provided with a connection base for fixedly connecting with the hopper assembly. When the hinge elbow is closed with the hopper assembly, the connection base is buckled on the hopper assembly, and the other ends of a plurality of the fasteners are inserted into the connection base.

[0008] In an embodiment of the present utility model, there are at least two of the fasteners, and at least two of the fasteners are spaced apart on the hopper assembly. One of the fasteners is arranged near the connection assembly, and the other locking assembly is arranged away from the connection assembly.

[0009] In an embodiment of the present utility model, the locking assembly further includes a plug. The fastener is provided with a through hole, and the plug is used to be placed into the through hole and simultaneously abut against the inner wall of the through hole and the connection base when the hinge elbow is closed with the hopper assembly, so as to lock the hinge elbow and the hopper assembly.

[0010] In an embodiment of the present utility model, the plug is a wedge block, and the plug and the fastener are matched through the wedge surface of the wedge block.

[0011] In an embodiment of the present utility model, when the hinge elbow is closed with the hopper assembly, the lower surface of the connection base and the upper hole wall of the through hole are at the same horizontal position, or the lower surface of the connection base is below the horizontal position of the upper hole wall of the through hole.

[0012] In an embodiment of the present utility model, the hopper assembly includes a hopper and a connection flange. The connection flange is fixedly connected to the hopper, and the hinge elbow is locked to the connection flange through the locking assembly.

[0013] The present utility model further provides a pumping device, including the hinge elbow connection structure as described above.

[0014] In an embodiment of the present utility model, it further includes a distribution valve and a delivery pipe. The distribution valve is located inside the hopper assembly and communicates with the hinge elbow, and the delivery pipe communicates with the hinge elbow.

[0015] In the hinge elbow connection structure, pumping system and pumping equipment of the present utility model, by providing a connection component, both ends of the connection component are respectively hinged to the hopper component and the hinge elbow. Pulling the hinge elbow a certain distance away from the hopper component until it is separated from the locking component, the hinge elbow can be rotated, and rotated to a specific angle and position. Such a design enables a larger rotation range of the hinge elbow, providing a larger space for maintenance near the discharge port of the pumping equipment; by providing a plurality of fasteners to lock the hopper component and the hinge elbow, the required axial space is smaller while ensuring a tight connection, and the maintenance operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. 6 is a schematic structural diagram of the hinge elbow and the hopper component of the hinge elbow connection structure according to an embodiment of the present utility model when they are closed.

[0017] Figure 2 is Figure 1 a cross-sectional view taken along A-A in FIG.

[0018] Figure 3 is Figure 1 a schematic structural diagram of the hinge elbow and the hopper component of the shown hinge elbow connection structure when they are opened.

[0019] Figure 4 is Figure 1 a schematic structural diagram of the hinge elbow of the shown hinge elbow connection structure when it is rotated to a certain position state after being opened.

[0020] DESCRIPTION OF THE REFERENCE NUMERALS:

[0021] 10 - Hopper component, 11 - Hopper, 12 - Connecting flange, 121 - Hinge ear, 20 - Hinge elbow, 21 - Connecting base, 22 - Elbow main body, 30 - Locking component, 31 - Fastener, 311 - Through hole, 32 - Plug-in, 40 - Connection component, 41 - First rod, 42 - Second rod, 60 - First rotating shaft, 70 - Second rotating shaft, 80 - Third rotating shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will further describe in detail the specific embodiments of the present utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0023] The present utility model provides a hinge elbow connection structure, as Figures 1-4As shown, the hinge elbow connection structure of an embodiment includes a hopper assembly 10, a hinge elbow 20, a locking assembly 30, and a connection assembly 40. The connection assembly 40 connects the hinge elbow 20 and the hopper assembly 10. The hinge elbow 20 can rotate around the connection assembly 40 to achieve the closing and opening of the hinge elbow 20 and the hopper assembly 10. The connection assembly 40 includes a first rod 41 and a second rod 42. One end of the first rod 41 is hinged to one end of the second rod 42 through a first rotating shaft 60. The other end of the first rod 41 is hinged to the hopper assembly 10 through a second rotating shaft 70. The other end of the second rod 42 is hinged to the hinge elbow 20 through a third rotating shaft 80. The locking assembly 30 includes a plurality of fasteners 31. One ends of the plurality of fasteners 31 are fixed to the hopper assembly 10. When the hinge elbow 20 and the hopper assembly 10 are closed, the other ends of the plurality of fasteners 31 are inserted into the hinge elbow 20 to lock the hinge elbow 20 and the hopper assembly 10.

[0024] In the hinge elbow connection structure of the present utility model, by providing the connection assembly 40, both ends of the connection assembly 40 are respectively hinged to the hopper assembly 10 and the hinge elbow 20. Pull the hinge elbow 20 a certain distance away from the hopper assembly 10 until it is separated from the locking assembly 30, and then the hinge elbow 20 can be rotated to a specific angle and position. Such a design makes the rotation range of the hinge elbow 20 larger, providing more space for the maintenance near the discharge port of the pumping equipment; by providing a plurality of fasteners 31 to lock the hopper assembly 10 and the hinge elbow 20, the required axial space is smaller while ensuring a tight connection, and the maintenance operation is convenient.

[0025] In this embodiment, the hinge elbow 20 includes a connection base 21 and an elbow body 22. The connection base 21 is fixedly connected to the elbow body 22 and is located at one end of the elbow body 22. The connection base 21 is used for fixedly connecting with the hopper 10. The other end of the second rod 42 is hinged to the connection base 21 through a third rotating shaft 80. The first rod 41 is hinged to the second rod 42 through a first rotating shaft 60 so that the distance between the second rotating shaft 70 and the third rotating shaft 80 can be changed. When the hinge elbow 20 and the hopper assembly 10 are closed, the connection base 21 is buckled on the hopper assembly 10, and the other ends of the plurality of fasteners 31 are inserted into the connection base 21; when the hinge elbow 20 and the hopper assembly 10 are opened, the connection base 21 moves away from the hopper assembly 10 until the other ends of the fasteners 31 are separated from the connection base 21. During the process of the connection base 21 moving away from the hopper assembly 10, the distance between the second rotating shaft 70 and the third rotating shaft 80 increases. The connection base 21 can rotate around the first rotating shaft 60 or the second rotating shaft 70 to open, facilitating the maintenance operation.

[0026] In this embodiment, the hopper assembly 10 includes a hopper 11 and a connecting flange 12. The connecting flange 12 is fixedly connected to the hopper 11, and the hinge elbow 20 is locked to the connecting flange 12 through a locking assembly 30. The hopper 11 is used to load materials such as concrete, and the pumping system pumps the concrete material in the hopper 11 to the hinge elbow 20.

[0027] Specifically, the locking assembly 30 is used to lock the inner end of the connection base 21 with the discharge port connection plate of the hopper 11 to prevent the outer end of the connection base 21 from turning outward, while connecting the inner end of the connection base 21 to the hopper 11. When the hinge elbow 20 and the hopper assembly 10 are opened, the connection base 21 of the hinge elbow 20 moves away from the hopper 11 until it is separated from the fastener 31 of the locking assembly 30. At this time, the second rotating shaft 70 and the third rotating shaft 80 have the maximum straight-line distance, and the connection base 21 is then rotated around the first rotating shaft 60 or the second rotating shaft 70 to be opened for maintenance. By providing the connection assembly 40, the hinge elbow 20 has a larger rotation range, providing more space for maintenance near the discharge port of the pumping equipment.

[0028] In this embodiment, there are at least two fasteners 31, and at least two fasteners 31 are arranged at intervals on the hopper assembly 10. Among them, one fastener 31 is arranged near the connection assembly 40, and the other locking assembly 30 is arranged away from the connection assembly 40. Specifically, the hinge elbow 20 is abutted against the hopper assembly 10 and locked with the hopper assembly 10, and the two are tightly fitted and locked, so that the concrete material can pass smoothly. The hinge elbow 20 is locked to the hopper assembly 10 by at least two fasteners 31 arranged at intervals. The two fasteners 31 are arranged at intervals and located on both sides of the elbow body 22. Such an arrangement makes the opposite ends of the connecting base 21 locked to the hopper assembly 10, and the tightness between the two is more fitted, and the concrete material can pass smoothly and be pumped out. The locking effect of the hinge elbow 20 can be guaranteed without high connection accuracy, and the sealing ring is not easily sheared and failed. It can be understood that those skilled in the art can set the number of fasteners 31 to 3, 4, etc. according to actual conditions, and it is not limited here.

[0029] In this embodiment, please refer to Figure 2 The locking assembly 30 also includes a plug-in 32, and a through hole 311 is opened on the fastener 31. The plug-in 32 is used to be inserted into the through hole 311 when the hinge elbow 20 and the hopper assembly 10 are closed and simultaneously abut against the inner wall of the through hole 311 and the connecting base 21, so that the hinge elbow 20 and the connecting flange 12 are locked.

[0030] Specifically, one end of the fastener 31 is fixedly connected to the connecting flange 12, and the other end of the fastener 31 passes through the connecting base 21. When the hinge elbow 20 is closed with the hopper assembly 10, the plug 32 is placed into the through hole 311 and simultaneously abuts against the inner wall of the through hole 311 and the connecting base 21, restricting the movement of the connecting base 21 in the direction away from the hopper 11 to lock the hinge elbow 20 and the connecting flange 12.

[0031] Specifically, the fastener 31 can be a pin shaft, the plug 32 is a wedge block, and the plug 32 is engaged with the fastener 31 through the wedge surface of the wedge block. Avoidance holes (not shown in the figure) for the fastener 31 to pass through are provided on the connecting base 21, and avoidance holes are provided at positions corresponding to the fastener 31. When the hinge elbow 20 is closed with the hopper assembly 10, during this process, the other end of the fastener 31 passes through the avoidance hole and is inserted into the connecting base 21, and the through hole 311 on the fastener 31 is exposed from below the connecting base 21. Subsequently, by placing the plug 32 into the through hole 311, the hinge elbow 20 is locked to the connecting flange 12 to keep them fixedly connected relatively.

[0032] In the embodiment of the present application, the plugs 32 of the left and right locking assemblies 30 are not easily loosened during use. Even if loosening occurs, they can be wedged tightly again with a hammer, and the operation is convenient and fast.

[0033] In this embodiment, a first connection hole and a second connection hole are respectively provided at both ends of the first rod 41, a third connection hole and a fourth connection hole are respectively provided at both ends of the second rod 42, and the connecting flange 12 includes a hinge ear 121. The first rod 41 is hinged to the connecting flange 12 by placing the second rotating shaft 70 into the first connection hole and the hinge ear 121; the first rod 41 is hinged to the second rod 42 by placing the first rotating shaft 60 into the second connection hole and the third connection hole; the second rod 42 is hinged to the connecting base 21 by placing the third rotating shaft 80 into the fourth connection hole and the connecting base 21. The whole connecting assembly 40 is located on one side of the connecting base 21 and the connecting flange 12, and the connecting assembly 40 connects the connecting base 21 and the connecting flange 12 as a two-link mechanism. When the hinge elbow 20 is opened with the hopper assembly 10, after taking out the plugs 32 in the two locking assemblies 30, the hinge elbow 20 is pulled out a certain distance in the direction away from the connecting flange 12 until the other end of the fastener 31 leaves the avoidance hole, and at this time, it can be rotated and opened around the connecting assembly 40.

[0034] It should be noted that there is a clearance fit between the fastener 31 and the avoidance hole, and the clearance value is very small and close to 0. When the hinge elbow 20 approaches the connecting flange 12 in the direction until they abut and fit, during this process, the fastener 31 passes through the avoidance hole and the two holes are axially engaged and connected, which plays a certain guiding and connecting role for the hinge elbow 20.

[0035] The connecting component 40 in this embodiment includes two rods (the first rod 41 and the second rod 41), which can be a two-link mechanism. It can be understood that the number of connecting rods in the connecting component 40 is not limited to two, and there can also be three, four, five, etc. It should be noted that when the number of connecting rods in the connecting component 40 is greater than two, taking the connecting component 40 including three connecting rods as an example, the size of each connecting rod is smaller than that of each connecting rod when the connecting component 40 has two connecting rods. The overall space occupied by the connecting component 40 in the hinge elbow connection structure is certain. When the number of connecting rods forming the connecting component 40 increases, the size of each connecting rod can be correspondingly reduced.

[0036] In this embodiment, when the hinge elbow 20 and the hopper assembly 10 are closed, an included angle is formed between the first rod 41 and the second rod 42, and the included angle is 20° to 160°. Those skilled in the art can set the included angle to 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, etc. according to the actual situation, and there is no unique limitation here. When the hinge elbow 20 and the hopper assembly 10 are opened, the length directions of the first rod 41 and the second rod 42 coincide, and the fastener 31 is far away from the connection base 21, that is, the fastener 31 leaves the avoidance hole. As Figure 3 shown in the structure, the hinge elbow 20 is axially withdrawn (in the direction away from the connection flange 12) to the limit state. At this time, the length directions of the first rod 41 and the second rod 42 coincide, and the maximum distance exists between the second rotating shaft 70 and the third rotating shaft 80. Subsequently, the hinge elbow 20 can rotate around the first rotating shaft 60 or the second rotating shaft 70, as Figure 4 shown in the state.

[0037] It can be understood that when the hinge elbow 20 and the hopper assembly 10 are opened, the length directions of the first rod 41 and the second rod 42 can be in an intersecting state. At this time, even if the maximum distance between the second rotating shaft 70 and the third rotating shaft 80 is not reached, the hinge elbow 20 can still be rotated and opened around the first rotating shaft 60 or the second rotating shaft 70.

[0038] In another preferred embodiment, the connecting assembly 40 may include three rods (a first rod 41, a second rod 42, and a third rod), and the first rod 41, the second rod 42, and the third rod are sequentially hinged. When the hinge elbow 20 and the hopper assembly 10 are opened, the length directions of the first rod 41, the second rod 42, and the third rod may intersect to present an included angle; alternatively, the length directions of the first rod 41, the second rod 42, and the third rod coincide, and the connecting assembly 40 presents an extreme state with the maximum distance between the two ends. In this case, the rods of each part in the connecting assembly 40 can use smaller sizes. It can be understood that the connecting assembly 40 that plays a connecting role between the hinge elbow 20 and the hopper assembly 10 can be designed as a multi-link structure, that is, the number of rods can be designed as 3, 4, 5, etc. according to the actual situation, and there is no unique limitation here. When the number of rods in the connecting assembly 40 increases, the sizes of the respective rods can be correspondingly reduced.

[0039] In this embodiment, when the hinge elbow 20 and the hopper assembly 10 are closed, the lower surface of the connecting base 21 and the upper hole wall of the through hole 311 are at the same horizontal position, or the lower surface of the connecting base 21 is below the horizontal position of the upper hole wall of the through hole 311. It can be understood that when the connecting base 21 abuts and fits against the connecting flange 12, in the horizontal position, the lower surface of the connecting base 21 coincides with the upper hole wall of the through hole 311 or the lower surface of the connecting base 21 is located below the upper hole wall of the through hole 311. Specifically, referring to Figure 2 the connection method in which the plug-in 32 is inserted into the through hole 311, the contact fit between the wedge-shaped surface of the plug-in 32 located below and the lower hole wall of the through hole 311, the surface of the plug-in 32 located above abuts against the lower surface of the connecting base 21, and the plug-in 32 applies an upward pressure to the connecting base 21, so that the connecting base 21 and the connecting flange 12 abut and fit against each other without gaps.

[0040] In this embodiment, the end face of one end of the fastener 31 passing through the avoidance hole may be arc-shaped, and the cross-sectional area of the fastener 31 near the avoidance hole gradually decreases from top to bottom in the axial direction. When the hinge elbow 20 moves away from the connecting flange 12 and the gap between the outer side surface of the fastener 31 and the inner wall of the avoidance hole gradually increases, the hinge elbow 20 can be rotated to open it. At this time, there will be no interference between the hinge elbow 20 and the fastener 31 during the rotation process of the hinge elbow 20.

[0041] The present utility model also provides a pumping device, including the hinge elbow connection structure as described above, and further including a distribution valve (not shown in the figure) and a conveying pipe (not shown in the figure). The distribution valve is located inside the hopper assembly 10 and is communicated with the hinge elbow 20, and the conveying pipe is communicated with the hinge elbow 20. Specifically, the pumping device can be a concrete pump truck.

[0042] In this text, unless otherwise clearly stipulated and defined, the terms "installed", "connected", and "joined" shall 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, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0043] In this text, the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the sake of clarity in expressing the technical solution and convenience in description. Therefore, it should not be construed as a limitation to the present utility model.

[0044] In this text, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion. In addition to the listed elements, it may also include other elements not expressly listed.

[0045] As described above, it is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claimed rights.

Claims

1. A hinge elbow connection structure, characterized in that, It includes a hopper assembly (10), a hinge elbow (20), a locking assembly (30) and a connecting assembly (40). The connecting assembly (40) connects the hinge elbow (20) and the hopper assembly (10). The hinge elbow (20) can rotate around the connecting assembly (40) to realize the closing and opening of the hinge elbow (20) and the hopper assembly (10). The connecting assembly (40) includes a first rod (41) and a second rod (42). One end of the first rod (41) is hinged to one end of the second rod (42) through a first rotating shaft (60). The other end of the first rod (41) is hinged to the hopper assembly (10) through a second rotating shaft (70). The other end of the second rod (42) is hinged to the hinge elbow (20) through a third rotating shaft (80). The locking assembly (30) includes a plurality of fasteners (31). One ends of the plurality of fasteners (31) are fixed to the hopper assembly (10). When the hinge elbow (20) and the hopper assembly (10) are closed, the other ends of the plurality of fasteners (31) are inserted into the hinge elbow (20) to lock the hinge elbow (20) and the hopper assembly (10).

2. The hinge elbow connection structure according to claim 1, characterized in that, When the hinge elbow (20) and the hopper assembly (10) are closed, an included angle is formed between the first rod (41) and the second rod (42), and the included angle is 20° - 160°.

3. The hinge elbow connection structure according to claim 1, characterized in that, One end of the hinge elbow (20) is provided with a connection base (21) for fixedly connecting with the hopper assembly (10). When the hinge elbow (20) and the hopper assembly (10) are closed, the connection base (21) is buckled on the hopper assembly (10), and the other ends of the plurality of fasteners (31) are inserted into the connection base (21).

4. The hinge elbow connection structure according to claim 3, characterized in that, There are at least two fasteners (31). At least two fasteners (31) are spaced on the hopper assembly (10). One of the fasteners (31) is arranged near the connecting assembly (40), and the other locking assembly (30) is arranged far from the connecting assembly (40).

5. The hinge elbow connection structure according to claim 4, characterized in that, The locking assembly (30) further includes a plug-in part (32). A through hole (311) is formed on the fastener (31). The plug-in part (32) is used to be placed into the through hole (311) and simultaneously abut against the inner wall of the through hole (311) and the connection base (21) when the hinge elbow (20) and the hopper assembly (10) are closed, so as to lock the hinge elbow (20) and the hopper assembly (10).

6. The hinge elbow connection structure according to claim 5, characterized in that, The plug-in part (32) is a wedge block, and the plug-in part (32) and the fastener (31) are matched through the wedge surface of the wedge block.

7. The hinge elbow connection structure according to claim 5, characterized in that, When the hinge elbow (20) and the hopper assembly (10) are closed, the lower surface of the connection base (21) and the upper hole wall of the through hole (311) are at the same horizontal position; or the lower surface of the connection base (21) is below the horizontal position of the upper hole wall of the through hole (311).

8. The hinge elbow connection structure according to claim 1, characterized in that, The hopper assembly (10) includes a hopper (11) and a connecting flange (12). The connecting flange (12) is fixedly connected to the hopper (11), and the hinge elbow (20) is locked to the connecting flange (12) through the locking assembly (30).

9. A pumping device, characterized in that, It includes the hinge elbow connection structure according to any one of claims 1-8.

10. The pumping device according to claim 9, characterized in that, It further includes a distribution valve and a delivery pipe. The distribution valve is located inside the hopper assembly (10) and communicates with the hinge elbow (20), and the delivery pipe communicates with the hinge elbow (20).

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