A practice mud machine for making antique Beijing bricks
The clay refining machine used in the production of antique Beijing bricks adopts automatic material return and circulating clay refining technology, which solves the problems of insufficient clay homogenization and low efficiency, improves clay quality and production efficiency, and is suitable for large-scale production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI DUOYI NEW MATERIAL TECH CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-07-14
AI Technical Summary
In the traditional production of antique-style Beijing bricks, the clay mixing equipment suffers from insufficient homogenization of clay and low efficiency, resulting in the finished brick blanks being prone to cracking and requiring high manual labor intensity.
Design a clay grinding machine for making antique Beijing bricks. It adopts an automatic material return and circulating clay grinding method. The double repeated crushing and shearing by the upper and lower spiral blades increases the number of clay grinding times. The material return device and the lifting device realize the circulation lifting and extrusion of the clay. Combined with the switching mode of the discharge device, automatic circulating clay grinding is realized.
It improves the plasticity and density of the clay, reduces internal voids, enhances the strength and mechanical properties of the finished brick blanks, reduces labor intensity, and is suitable for large-scale production.
Smart Images
Figure CN224489539U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a clay mixing machine for making antique-style Beijing bricks. Background Technology
[0002] In the traditional production of antique-style Beijing bricks, the clay preparation process demands extremely high uniformity, density, and plasticity of the clay. Existing clay preparation equipment mostly employs unidirectional extrusion or simple circulating mixing methods, which have the following technical drawbacks:
[0003] Insufficient homogenization of clay: Conventional single extrusion is insufficient to fully remove air bubbles in the clay, resulting in a loose internal structure of the finished brick blank, which is prone to cracking after firing;
[0004] Low efficiency: Manual reprocessing and mud preparation is labor-intensive.
[0005] Based on the above problems, we designed a clay mixing machine for making antique Beijing bricks that can automatically return materials, realize cyclic clay mixing, increase the number of clay mixing times, and improve the quality of clay. Utility Model Content
[0006] The technical problem to be solved by this utility model is to provide a clay kneading machine for making antique Beijing bricks that can automatically return materials, realize cyclic clay kneading, increase the number of clay kneading times, and improve the quality of clay.
[0007] To solve the above problems, the present invention adopts the following technical solution:
[0008] A clay-making machine for producing replica ancient Beijing bricks includes a feeding pipe, an upper rotating shaft rotatably mounted at the center of the feeding pipe, upper spiral blades welded to the outside of the upper rotating shaft, an upper geared motor mounted at the left end of the feeding pipe, the upper geared motor driving the upper rotating shaft, a feeding hopper located at the top left of the feeding pipe, and a discharge plate inclinedly located at the lower right end of the feeding pipe. It also includes a return device, a lifting device, and a discharge device. The return device is arranged parallel to the bottom of the feeding pipe. The lifting device is installed between the feeding pipe and the return device. The lifting device lifts the mud fed back by the return device into the feeding pipe. The lifting position is located on the left side of the feeding hopper. The discharge device is installed at the right end of the feeding pipe. When the discharge device is inserted into the feeding pipe, the mud squeezed out from the feeding pipe falls onto the discharge plate after passing through the discharge device. When the discharge device retracts to block the opening of the feeding pipe, the mud conveyed to the right by the upper spiral blade falls into the return device.
[0009] Preferably, a return port is provided at the bottom of the feeding pipe, and the return port is located on the left side of the feeding hopper. The lifting device cooperates with the return port. Multiple extrusion holes are evenly distributed at the bottom right side of the feeding pipe. A collecting pipe is welded to the right side of the feeding pipe. The extrusion holes are located inside the collecting pipe and are connected to the return device through the collecting pipe.
[0010] Preferably, the return material device includes a feeding pipe, a lower rotating shaft rotatably installed inside the feeding pipe, a lower spiral blade welded to the lower rotating shaft, a lower reduction motor installed at the right end of the feeding pipe, a connecting pipe provided at the top of the feeding pipe near the right end, the connecting pipe connecting to the collecting pipe, so that the mud extruded from the extrusion hole falls into the feeding pipe after passing through the connecting pipe, and the left end of the feeding pipe connects to the lifting device.
[0011] Preferably, the lifting device includes a lifting pipe with its upper and lower ends connected. The upper end of the lifting pipe is connected to the return port. The discharge pipe is welded and fixed to the lifting pipe and is connected to it. The mud output by the lower spiral blade falls into the lifting pipe. A piston rod is provided inside the lifting pipe. A vertical guide groove is provided on the outer wall of the lifting pipe. The guide groove is located below the discharge pipe. A guide plate is welded to the outer wall of the piston rod near the bottom. The guide plate cooperates with the guide groove. The piston rod is hollow inside. A base plate is fixed to the bottom of the piston rod. A nut is provided at the center of the axis of the base plate. A lower bracket is welded below the lifting pipe. A drive motor is installed through the lower bracket. A screw is installed at the output end of the drive motor. The screw cooperates with the nut.
[0012] Preferably, the upper end of the piston rod is machined to form an arc-shaped groove, which connects with the inner wall of the feed tube as the piston rod moves upward to its limit position.
[0013] Preferably, an outer support is installed on the outside of the lifting tube, and a limit switch is installed at the bottom of the outer support. The limit switch is connected to the drive motor. Before the guide plate moves to the limit position, it contacts the limit switch. After contact, the drive motor is de-energized.
[0014] Preferably, the discharge device includes a gantry frame, a first hydraulic telescopic rod, a second hydraulic telescopic rod, a piston plate, and a plug. The gantry frame is welded to the right end of the feeding pipe. Two first hydraulic telescopic rods are provided at the front and rear, both fixedly installed via the gantry frame. The piston plate is inserted into the feeding pipe and forms a seal with the inner wall of the feeding pipe. An extension tube is provided on the right side of the piston plate, and an extrusion hole is provided at the axis of the piston plate, penetrating the extension tube. A connecting bracket is installed on the outside of the extension tube, and the movable end of the first hydraulic telescopic rod is fixed to the connecting bracket. The second hydraulic telescopic rod is also installed via the gantry frame, and the plug is installed on the movable end of the second hydraulic telescopic rod, sealing the extrusion hole after insertion.
[0015] The beneficial effects of this utility model are:
[0016] One advantage is that this device can switch between circulating mud processing and mud discharge by adjusting the discharge device, making it simple and convenient to operate.
[0017] Secondly, the recycling and lifting devices enable cyclical mud processing. By increasing the number of processing cycles, the plasticity of the mud can be improved, and air can be squeezed out. Furthermore, this recycling method eliminates the need for manual handling of the mud, greatly enhancing convenience.
[0018] Thirdly, during the return process, the mud is extruded from the extrusion hole, and this compression extrusion method can squeeze out air bubbles in the mud.
[0019] Fourthly, the upper and lower spiral blades can repeatedly crush and shear the clay particles, breaking down their original structure and making them more compact and evenly distributed in terms of moisture. This enhances the ductility of the clay and facilitates shaping operations such as throwing and printing.
[0020] Fifthly, the clay particles are more tightly bonded after kneading, reducing internal voids and improving the strength of the green body and its mechanical properties after firing (such as hardness and flexural strength).
[0021] Advantage six: Mechanized mud preparation is more efficient than manual mud preparation, can quickly process large quantities of mud, and ensure batch consistency, making it suitable for large-scale production. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a cross-sectional view of the present invention;
[0024] Figure 2 This is a magnified view of point A;
[0025] Figure 3 This is a schematic diagram of the discharge device in the mud discharge state.
[0026] Figure 4 This is a cross-sectional view of the lifting device;
[0027] Figure 5 This is a schematic diagram of the piston rod moving upwards;
[0028] Figure 6 This is a side view of the piston rod;
[0029] Figure 7 This is a top view of the device. Detailed Implementation
[0030] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.
[0031] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.
[0032] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0033] Furthermore, in the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "socket," "connect," "through," and "plug-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0035] See Figure 1 The illustrated clay-making machine for producing antique-style Beijing bricks includes a feeding pipe 1, with an upper rotating shaft 11 rotatably mounted at the center of the feeding pipe 1. The upper rotating shaft 11 and the feeding pipe are connected by a bearing and a shaft seal, with the shaft seal sealing the inner side of the bearing. An upper spiral blade 12 is welded to the outside of the upper rotating shaft 11. An upper geared motor 13 is installed at the left end of the feeding pipe 1, driving the upper rotating shaft 11. A feeding hopper 14 is located slightly to the left of the top of the feeding pipe 1, and a discharge plate 15 is inclinedly arranged at the lower right end of the feeding pipe 1. The machine also includes a return device 2, a lifting device 3, and a discharge device 4. The feed hopper 14 is positioned parallel to the feed pipe 1 below it. The lifting device 3 is installed between the feed pipe 1 and the return device 2. The lifting device 3 lifts the mud returned by the return device 2 upwards into the feed pipe 1. The lifting position is located on the left side of the feed hopper 14. The discharge device 4 is installed at the right end of the feed pipe 1. When the discharge device 4 is inserted into the feed pipe 1, the mud squeezed out from the feed pipe 1 falls onto the discharge plate 15 after passing through the discharge device 4. When the discharge device 4 retracts to block the opening of the feed pipe 1, the mud conveyed to the right by the upper spiral blade 12 falls into the return device 2.
[0036] The above technical solution provides two working modes:
[0037] The first method is cyclic mud refining. That is, by retracting the discharge device 4, a seal is formed at the opening of the feed pipe 1. When the mud enters from the feed hopper 14, it is conveyed, squeezed and stirred by the upper spiral blade 12 and then conveyed to the right end of the feed pipe 1. Due to the blockage of the discharge device 4, the mud will be squeezed into the return device 2 and conveyed to the left side of the return device 2 to the lifting device 3. Then, the lifting device 3 conveys it upward to the upper feed pipe 1, and then the next mud refining is carried out, realizing automatic cyclic mud refining.
[0038] The second method is mud discharge. When mud discharge is required, the mud is squeezed out through the insertion of the discharge device 4.
[0039] The above technical solution also includes a control cabinet, through which overall control is achieved.
[0040] The output speed of the geared motor is set through the control cabinet.
[0041] See Figure 1 and Figure 2 As shown, a return port 121 is provided at the bottom of the feeding pipe 1. The return port 121 is located on the left side of the feeding hopper 14. The lifting device 3 cooperates with the return port 121. Multiple extrusion holes 131 are evenly distributed at the bottom right side of the feeding pipe 1. A collecting pipe 141 is welded to the right side of the feeding pipe 1. The extrusion holes 131 are located inside the collecting pipe 141 and are connected to the return device 2 through the collecting pipe 141.
[0042] In the above technical solution, when the mud is conveyed to the right end of the feeding pipe 1 and the discharge device 4 is in the retraction state, the mud is squeezed out from the extrusion hole 131. During the extrusion process, the mud is squeezed and refined, and then conveyed and integrated through the return device 2.
[0043] In the above technical solution, the return port 121 is located on the left side of the feed hopper 14, so that the return position is misaligned with the original feed position.
[0044] See Figure 1 and Figure 2 As shown, the return material device 2 includes a feeding pipe 21, and a lower rotating shaft 22 is rotatably installed inside the feeding pipe 21. The lower rotating shaft 22 and the feeding pipe 21 are connected by a bearing and a shaft seal. A lower spiral blade 23 is welded to the lower rotating shaft 22. A lower reduction motor 24 is installed at the right end of the feeding pipe 21. A connecting pipe 25 is provided at the top of the feeding pipe 21 near the right end. The connecting pipe 25 is connected to the collecting pipe 141, so that the mud extruded from the extrusion hole 131 falls into the feeding pipe 21 after passing through the connecting pipe 25. The left end of the feeding pipe 21 is connected to the lifting device 3.
[0045] In the above technical solution, the speed of the lower gear motor 24 is controlled by the control cabinet.
[0046] In the above technical solution, material return is achieved by rotating the lower spiral blade 23.
[0047] See Figure 4 and Figure 5As shown, the lifting device 3 includes a lifting pipe 31, with its upper and lower ends connected. The upper end of the lifting pipe 31 is connected to the return port 121. The discharge pipe 21 is welded and fixed to the lifting pipe 31 and is connected to it. The mud output by the lower spiral blade 23 falls into the lifting pipe 31. A piston rod 32 is provided inside the lifting pipe 31. A vertical guide groove 33 is provided on the outer wall of the lifting pipe 31, and the guide groove 33 is located below the discharge pipe 21. A guide plate 34 is welded to the outer wall of the piston rod 32 near the bottom. The guide plate 34 cooperates with the guide groove 33. The piston rod 32 is hollow inside. A base plate 35 is fixed to the bottom of the piston rod 32. A nut 36 is fixed at the axis of the base plate 35. A lower bracket 37 is welded below the lifting tube 31. A drive motor 38 is installed through the lower bracket 37. A screw 39 is installed at the output end of the drive motor 38. The screw 39 cooperates with the nut 36.
[0048] In the above technical solution, when the piston rod 32 is pushed upward to the limit position, the outer wall of the piston rod 32 forms a seal on the left end of the feed tube 21.
[0049] The forward and reverse rotation of the drive motor 38 is set through the control cabinet. The setting parameters also include the forward and reverse rotation speed and the start time.
[0050] In the above technical solution, when the drive motor 38 drives the piston rod 32 to move upward, it is necessary to reduce the speed of the lower rotating shaft 22.
[0051] See Figure 6 As shown, an arc-shaped groove 333 is machined at the upper end of the piston rod 32. As the piston rod moves upward to its limit position, the arc-shaped groove 333 connects with the inner wall surface of the feed pipe 1.
[0052] In this technical solution, when the piston rod 32 moves upward, the upper spiral blade 12 is adapted to the arc groove 333 to push away the mud pushed upward by the piston rod 32.
[0053] See Figure 4 As shown, an outer bracket 334 is installed on the outside of the lifting tube 31, and a limit switch 335 is installed at the bottom of the outer bracket 334. The limit switch 335 is connected to the drive motor 38. Before the guide plate 34 moves up to the limit position, it contacts the limit switch 335. After contact, the drive motor is de-energized.
[0054] The above technical solution restricts the upward movement of the piston rod 32, preventing the piston rod 32 from colliding with the spiral blade 12 after moving too far upward.
[0055] See Figure 2 , Figure 3 and Figure 7As shown, the discharge device 4 includes a gantry frame 41, a first hydraulic telescopic rod 42, a second hydraulic telescopic rod 43, a piston plate 44, and a plug 45. The gantry frame 41 is welded to the right end of the feeding pipe 1. Two first hydraulic telescopic rods 42 are provided at the front and rear, both of which are fixedly installed through the gantry frame 41. The piston plate 44 is inserted into the feeding pipe 1 and forms a seal with the inner wall of the feeding pipe 1. An extension pipe 441 is provided on the right side of the piston plate 44. An extrusion hole 442 is provided at the axis of the piston plate 44 and penetrates the extension pipe 441. A connecting bracket 443 is installed on the outside of the extension pipe 441. The movable end of the first hydraulic telescopic rod 42 is fixed to the connecting bracket 443. The second hydraulic telescopic rod 43 is also installed through the gantry frame 41. The plug 45 is installed on the movable end of the second hydraulic telescopic rod 43. After the plug 43 is inserted, it closes the extrusion hole 442.
[0056] In the above technical solution, the first hydraulic telescopic rod 42 and the second hydraulic telescopic rod 43 are supplied with oil by independent hydraulic systems. The hydraulic systems can be controlled independently, and the control module is integrated in the control cabinet.
[0057] The above technical solution has the following technical effects:
[0058] Sludge discharge state: When sludge discharge is required, the first hydraulic telescopic rod 42 rises and the second hydraulic telescopic rod 43 retracts. At this time, the piston plate 44 is pushed into the feeding pipe 1, and the upper rotating shaft is inserted into the extrusion hole 442, maintaining a gap of 2mm to 4mm between the upper rotating shaft and the extrusion hole 442. The sludge can be extruded through this gap. After the second hydraulic telescopic rod 43 retracts, the plug 45 exits the extrusion hole 442. At this time, the sludge falls onto the discharge plate 15 after passing through the extrusion hole 442.
[0059] In the circulating mud-grinding state: the retraction of the first telescopic rod 42 causes the piston plate 44 to seal at the right end of the feed pipe 1, and the second hydraulic telescopic rod 43 lifts, causing the plug 45 to seal inside the extrusion hole 442. At this time, the mud pushed to the right by the upper spiral blades is conveyed to the return material device 2 through the extrusion hole, and then to the lifting device 3, realizing the circulating mud-grinding.
[0060] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0061] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0062] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0063] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0064] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.
[0065] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A clay-making machine for producing antique-style Beijing bricks, comprising a feeding pipe, an upper rotating shaft rotatably mounted at the axis of the feeding pipe, an upper spiral blade welded to the outside of the upper rotating shaft, an upper geared motor mounted at the left end of the feeding pipe, the upper geared motor driving the upper rotating shaft, a feeding hopper positioned slightly to the left of the top of the feeding pipe, and a discharge plate inclinedly positioned at the lower right end of the feeding pipe, characterized in that: It also includes a return material device, a lifting device, and a discharge device. The return material device is arranged parallel to the bottom of the feeding pipe. The lifting device is installed between the feeding pipe and the return material device. The lifting device lifts the mud fed back by the return material device upward into the feeding pipe. The lifting position is located on the left side of the feeding hopper. The discharge device is installed at the right end of the feeding pipe. When the discharge device is inserted into the feeding pipe, the mud squeezed out at the feeding pipe falls onto the discharge plate after passing through the discharge device. When the discharge device retracts to block the opening of the feeding pipe, the mud conveyed to the right by the upper spiral blade falls into the return material device.
2. The clay mixing machine for making antique-style Beijing bricks according to claim 1, characterized in that: A return port is provided at the bottom of the feeding pipe, located on the left side of the feeding hopper. The lifting device cooperates with the return port. Multiple extrusion holes are evenly distributed at the bottom right side of the feeding pipe. A collecting pipe is welded to the right side of the feeding pipe. The extrusion holes are located inside the collecting pipe and are connected to the return device through the collecting pipe.
3. The clay mixing machine for making antique-style Beijing bricks according to claim 2, characterized in that: The material return device includes a feeding pipe, a lower rotating shaft rotatably installed inside the feeding pipe, a lower spiral blade welded to the lower rotating shaft, a lower reduction motor installed at the right end of the feeding pipe, a connecting pipe provided at the top of the feeding pipe near the right end, the connecting pipe connecting to the collecting pipe, so that the mud extruded from the extrusion hole falls into the feeding pipe after passing through the connecting pipe, and the left end of the feeding pipe connects to the lifting device.
4. The clay mixing machine for making antique-style Beijing bricks according to claim 3, characterized in that: The lifting device includes a lifting pipe with its upper and lower ends connected. The upper end of the lifting pipe is connected to the return port. The discharge pipe is welded and fixed to the lifting pipe and is connected to it. The mud output by the lower spiral blade falls into the lifting pipe. A piston rod is provided inside the lifting pipe. A vertical guide groove is provided on the outer wall of the lifting pipe. The guide groove is located below the discharge pipe. A guide plate is welded to the outer wall of the piston rod near the bottom. The guide plate cooperates with the guide groove. The piston rod is hollow inside. A base plate is fixed to the bottom of the piston rod. A nut is provided at the axis of the base plate. A lower bracket is welded below the lifting pipe. A drive motor is installed through the lower bracket. A screw is installed at the output end of the drive motor. The screw cooperates with the nut.
5. The clay mixing machine for making antique-style Beijing bricks according to claim 4, characterized in that: The upper end of the piston rod is machined to form an arc-shaped groove, which connects with the inner wall of the feed tube as the piston rod moves upward to its limit position.
6. The clay mixing machine for making antique-style Beijing bricks according to claim 4, characterized in that: An outer support is installed on the outside of the lifting tube, and a limit switch is installed at the bottom of the outer support. The limit switch is connected to the drive motor. Before the guide plate moves to the limit position, it contacts the limit switch. After contact, the drive motor is de-energized.
7. The clay mixing machine for making antique-style Beijing bricks according to claim 2, characterized in that: The discharge device includes a gantry frame, a first hydraulic telescopic rod, a second hydraulic telescopic rod, a piston plate, and a plug. The gantry frame is welded to the right end of the feeding pipe. Two first hydraulic telescopic rods are provided at the front and rear, both fixedly installed via the gantry frame. The piston plate is inserted into the feeding pipe and forms a seal with the inner wall of the feeding pipe. An extension tube is provided on the right side of the piston plate, and an extrusion hole is provided at the axis of the piston plate, penetrating the extension tube. A connecting bracket is installed on the outside of the extension tube, and the movable end of the first hydraulic telescopic rod is fixed to the connecting bracket. The second hydraulic telescopic rod is also installed via the gantry frame, and the plug is installed on the movable end of the second hydraulic telescopic rod, sealing the extrusion hole after insertion.