Accelerator injection device

Abstract

The utility model relates to an accelerator injection device. The device comprises a rack; the funnel is mounted on the rack, and an accelerator is contained in the funnel; the driving part is mounted at the bottom of the funnel; the material gathering hopper is arranged in the funnel and is connected with a driving shaft of the driving piece; the material conveying pipe is arranged between the grouting pipeline and the material gathering hopper, and the material conveying pipe is used for being connected to the end, close to the grout outlet, of the grouting pipeline; and the driving piece drives the material gathering hopper to move up and down in the funnel, so that the material gathering hopper is connected or disconnected with the material conveying pipe. The material gathering hopper moves downwards in the funnel so that part of the accelerator in the funnel can fall into the material gathering hopper, the material gathering hopper moves upwards so that the accelerator in the material gathering hopper can be pushed into the material conveying pipe to be conveyed into the grouting pipeline, and the accelerator and concrete paste are mixed near a grout outlet of the grouting pipeline. The situation that the flow speed of the concrete paste in the grouting pipeline is reduced due to the fact that the accelerator and the concrete paste are mixed and solidified too early is avoided, and the filling effect of the concrete paste on the to-be-filled area is guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the technical field of accelerating setting agent injection, and in particular to an accelerating setting agent injection device. Background Art

[0002] In underground coal mines, workers will use the paste filling process to fill the empty areas after coal is mined with concrete paste. After the concrete paste solidifies, it can replace the coal seam to support the top and bottom plates of the original coal seam. Accelerators are added to the concrete paste to accelerate the solidification speed of the concrete paste.

[0003] In the related technology, workers will mix concrete paste and accelerator and then inject it into the grouting pipeline. When the concrete paste is transported by pipeline over long distances, the flow rate of the concrete paste in the grouting pipeline will slow down under the influence of the accelerator, and may even block the grouting pipeline, which will affect the filling effect of the concrete paste on the open area. Utility Model Content

[0004] The purpose of the present disclosure is to provide a quick-setting agent injection device to at least partially solve the problems existing in the related art.

[0005] In order to achieve the above-mentioned purpose, the present disclosure provides an accelerator injection device, which includes a frame; a funnel installed on the frame, and the funnel contains an accelerator; a driving member installed at the bottom of the funnel; a gathering hopper arranged in the funnel and connected to the driving shaft of the driving member; and a feed pipe arranged between a grouting pipeline and the gathering hopper, and the feed pipe is used to be connected to one end of the grouting pipeline close to the slurry outlet; the driving member drives the gathering hopper to move up and down in the funnel to connect or disconnect the gathering hopper with the feed pipe.

[0006] Optionally, the quick-setting agent is in powder form, and the inner diameter of one end of the feed pipe close to the aggregate hopper is configured as a first bell mouth, the inner diameter of the first bell mouth gradually increases from top to bottom, the inner diameter of the aggregate hopper is larger than the inner diameter of the feed pipe, and a protrusion is provided in the aggregate hopper, which can be inserted into the first bell mouth to push the quick-setting agent into the feed pipe.

[0007] Optionally, the inner diameter of one end of the aggregate hopper close to the feed pipe is configured as a second bell mouth, the inner diameter of the second bell mouth gradually increases from bottom to top, and the bottom of the aggregate hopper is closed and connected to the drive shaft of the drive member.

[0008] Optionally, the quick-setting agent injection device further comprises a thread, one end of which is used for fixed connection with the grouting pipeline, and the other end of which is threadedly connected with the feed pipe;

[0009] The quick-setting agent injection device also includes a mesh plate, which is installed in the thread, and the quick-setting agent enters the grouting pipeline through the mesh holes of the mesh plate.

[0010] Optionally, the aperture size of the mesh gradually increases from bottom to top.

[0011] Optionally, the mesh plate is connected to the material conveying pipe via a sealing ring, and the sealing ring is used to seal the gap between the mesh plate and the material conveying pipe.

[0012] Optionally, the mounting portion of the drive member is threadedly connected to the bottom of the funnel.

[0013] Optionally, the feed pipe is connected to the funnel via a plurality of connecting rods, the plurality of connecting rods are spaced apart in the up-down direction, both ends of the connecting rods are fixed to the inner wall of the funnel and connected to the feed pipe via fasteners.

[0014] Optionally, the accelerator injection device also includes a support plate and two support rods, the two ends of the support rods are respectively connected to the edge of the funnel and the support plate, the accelerator injection device also includes a lifting mechanism installed on the frame, the support plate is connected to the frame via the lifting mechanism, and the lifting mechanism is used to adjust the distance from the support plate to the frame.

[0015] Optionally, the lifting mechanism includes two screws and two nuts, the two screws are respectively arranged on both sides of the support plate, the two sides of the support plate and the two nuts are respectively sleeved on the two screws and threadedly connected with the two screws, and the nuts are rotated to push the support plate to drive the funnel and the feed pipe to perform lifting and lowering movements relative to the frame.

[0016] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0017] The feed pipe is arranged between the slurry outlet and the aggregate hopper of the grouting pipeline. When the accelerator needs to be injected into the grouting pipeline, the driving member drives the aggregate hopper to move downward in the funnel to disconnect the aggregate hopper from the feed pipe, so that part of the accelerator in the funnel falls into the aggregate hopper. The driving member can also drive the aggregate hopper to move upward to push the accelerator in the aggregate hopper into the feed pipe to transport it to the grouting pipeline. The accelerator and concrete paste are mixed near the slurry outlet of the grouting pipeline to avoid a reduction in the flow rate of the concrete paste in the grouting pipeline due to premature mixing and solidification of the accelerator with the concrete paste, thereby avoiding clogging of the pipeline by the concrete paste and ensuring the filling effect of the concrete paste on the area to be filled.

[0018] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of a quick-setting agent injection device according to an exemplary embodiment of the present disclosure.

[0021] Figure 2 yes Figure 1 A partial enlarged schematic diagram of part A in the middle.

[0022] Figure 3 yes Figure 1 Cross-sectional view along the BB direction.

[0023] Figure 4 The following is an operation flow chart of a method for injecting an accelerating setting agent according to an exemplary embodiment of the present disclosure. Figure 1 .

[0024] Figure 5 The following is an operation flow chart of a method for injecting an accelerating setting agent according to an exemplary embodiment of the present disclosure. Figure 2 .

[0025] Description of Reference Numerals

[0026] 10. Grouting pipeline; 11. Slurry outlet; 100. Frame; 210. Funnel; 220. Support plate; 230. Support rod; 300. Driving member; 400. Aggregate hopper; 410. Protrusion; 420. Second bell mouth; 500. Feed pipe; 510. First bell mouth; 610. Thread; 620. Mesh plate; 621. Mesh; 630. Sealing ring; 640. Connecting rod; 700. Lifting mechanism; 710. Screw; 720. Nut. DETAILED DESCRIPTION

[0027] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0028] In the present disclosure, unless otherwise stated, the directional words used, such as "upper" and "lower", are defined according to the normal installation of the quick-setting agent injection device. Figure 1 In the drawing direction, "inside" and "outside" are defined according to the outline of the corresponding parts. In addition, when the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0029] See also Figure 1 and Figure 3The embodiment of the present disclosure provides a device for injecting an accelerating agent, which may include a frame 100, a hopper 210, a driving member 300, a collecting hopper 400 and a conveying pipe 500. The hopper 210 may be mounted on the frame 100, and the hopper 210 may contain an accelerating agent. The driving member 300 may be mounted on the bottom of the hopper 210, and the driving member 300 may be an oil cylinder or a gas cylinder. The collecting hopper 400 may be arranged in the hopper 210, and may be connected to the driving shaft of the driving member 300. The conveying pipe 500 may be arranged between the grouting pipeline 10 and the collecting hopper 400, and the collecting hopper 500 may be used to connect to one end of the grouting pipeline 10 near the slurry outlet 11, and the driving member 300 may drive the collecting hopper 400 to move up and down in the hopper 210, so that the collecting hopper 400 is connected or disconnected with the conveying pipe 500.

[0030] It can be understood that the feed pipe 500 is arranged between the slurry outlet 11 of the grouting pipeline 10 and the aggregate hopper 400, and the quick-setting agent is added into the funnel 210. When the quick-setting agent needs to be injected into the grouting pipeline 10, the driving member 300 drives the aggregate hopper 400 to move downward in the funnel 210 to disconnect the aggregate hopper 400 from the feed pipe 500, so that part of the quick-setting agent in the funnel 210 falls into the aggregate hopper 400 from the top opening of the aggregate hopper 400. The driving member 300 can also drive the aggregate hopper 400 to move downward in the funnel 210. 0 moves upward to push the quick-setting agent in the hopper 400 into the feed pipe 500 to be transported to the vicinity of the slurry outlet 11 of the grouting pipeline 10, and the quick-setting agent is mixed with the concrete paste to avoid the reduction of the flow rate of the concrete paste in the grouting pipeline 10 due to the quick-setting agent mixing with the concrete paste too early and solidifying, thereby avoiding the concrete paste blocking the pipeline and ensuring the filling effect of the concrete paste on the area to be filled. The filled area can quickly support the top and bottom plates of the original coal seam to avoid the collapse of the coal seam.

[0031] In one embodiment, see Figure 3 The quick-setting agent can be in powder form, and the inner diameter of one end of the feed pipe 500 close to the aggregate hopper 400 can be constructed as a first bell mouth 510. The inner diameter of the first bell mouth 510 can gradually increase from top to bottom. The inner diameter of the aggregate hopper 400 is larger than the inner diameter of the feed pipe 500. A protrusion 410 can be provided in the aggregate hopper 400, and the protrusion 410 can be inserted into the first bell mouth 510 to push the quick-setting agent into the feed pipe 500.

[0032] It can be understood that when the driving member 300 drives the aggregate hopper 400 to move upward, the accelerator powder around the protrusion 410 will contact the first bell mouth 510 of the feed pipe 500 and "gather" upward along the side wall of the first bell mouth 510. The protrusion 410 squeezes the "gathered" accelerator powder into the feed pipe 500 to prevent the accelerator powder from falling out of the feed pipe 500 when the aggregate hopper 400 moves downward. The driving member 300 is connected to the intelligent automatic control system so that the driving member 300 repeatedly drives the aggregate hopper 400 to move upward and downward, so that more accelerator powder is pushed into the feed pipe 500 by the protrusion 410, so that the accelerator powder that enters the feed pipe 500 later pushes the accelerator powder that enters the feed pipe 500 earlier to move upward until part of the accelerator powder is transported to the vicinity of the slurry outlet 11 of the grouting pipeline 10. In this embodiment, the collecting hopper 400 reciprocates, and the quick-setting agent powder enters the vertical section of the delivery pipe 500 through the first bell mouth 510 and undergoes a continuous accumulation process, gradually filling the top of the delivery pipe 500. After filling the delivery pipe 500, each time the collecting hopper 400 moves upward, the quick-setting agent at the top of the delivery pipe 500 will be gradually added to the grouting pipeline 10 little by little, thereby achieving the effect of slowly injecting the quick-setting agent. By controlling the upward movement distance of the collecting hopper 400 and the frequency of the reciprocating movement, the amount of the quick-setting agent injected each time can be effectively controlled, and the quick-setting agent and the concrete paste are mixed, thereby avoiding a reduction in the flow rate of the concrete paste in the grouting pipeline 10 due to the quick-setting agent being mixed and solidified earlier with the concrete paste, thereby avoiding clogging of the pipeline by the concrete paste.

[0033] In one embodiment, see Figure 1 and Figure 3 The inner diameter of one end of the aggregate hopper 400 close to the feed pipe 500 can be constructed as a second bell mouth 420, and the inner diameter of the second bell mouth 420 can gradually increase from bottom to top. When the aggregate hopper 400 moves downward, it is convenient for part of the quick-setting agent powder in the funnel 210 to quickly slide into the aggregate hopper 400 along the side wall of the bell, thereby increasing the speed at which the quick-setting agent powder enters the aggregate hopper 400, thereby increasing the speed at which the quick-setting agent powder is injected into the grouting pipeline 10, and also facilitating the connection between the aggregate hopper 400 and the feed pipe 500. The bottom of the aggregate hopper 400 is sealed and connected to the driving shaft of the driving member 300 to prevent the powder in the aggregate hopper 400 from leaking out from the bottom. A bellows can be sleeved on the driving shaft of the driving member 300, and the two ends of the bellows are respectively connected to the bottom of the aggregate hopper 400 and the mounting part of the driving member 300. When the driving shaft of the driving member 300 drives the aggregate hopper 400 to move up and down, the bellows can be retracted and expanded to prevent the quick-setting agent powder at the bottom of the funnel 210 from entering the interior of the driving member 300 through the driving shaft of the driving member 300, thereby affecting the working stability and reliability of the driving member 300.

[0034] In one embodiment, see Figure 1 and Figure 2 The accelerator injection device may further include a thread 610, one end of which may be used for fixed connection with the grouting pipeline 10, and the other end of which may be threadedly connected with the feed pipe 500. The accelerator injection device may further include a mesh plate 620, which may be installed in the thread 610. The accelerator may enter the grouting pipeline 10 through the mesh holes 621 of the mesh plate 620 and the opening of the grouting pipeline 10. By setting the mesh plate 620, it is possible to prevent excessive accelerator powder from entering the grouting pipeline 10 through the feed pipe 500, thereby preventing excessive use of accelerator powder; and it is possible to prevent stones in the concrete paste from entering the feed pipe 500 and causing blockage of the feed pipe 500.

[0035] For further information, see Figure 1 and Figure 2 The aperture size of the mesh 621 can be gradually increased from bottom to top, and the quick-setting agent powder is divided into multiple small strips when passing through the mesh plate 620. Since the inner diameter of the mesh 621 gradually increases from bottom to top, the quick-setting agent powder moving from bottom to top in the feed pipe 500 can quickly pass through the mesh 621 and enter the grouting pipeline 10.

[0036] In this implementation, see Figure 1 and Figure 2 The mesh plate 620 can be connected to the feed pipe 500 through a sealing ring 630. The sealing ring 630 can be used to seal the gap between the mesh plate 620 and the feed pipe 500 to prevent part of the accelerator powder from being retained in the gap, thereby causing waste of the accelerator powder.

[0037] In one embodiment, see Figure 1 and Figure 3 The mounting portion of the driving member 300 can be threadedly connected to the bottom of the funnel 210 to facilitate the detachable connection between the driving member 300 and the funnel 210.

[0038] In this implementation, see Figure 3 The feed pipe 500 can be connected to the funnel 210 through a plurality of connecting rods 640, which can be anchor rods. The plurality of connecting rods 640 are arranged at intervals in the vertical direction, and both ends of the connecting rods 640 are fixed to the inner wall of the funnel 210 and connected to the feed pipe 500 through fasteners. At this time, the connecting rods 640 can bear the weight of the feed pipe 500, and prevent the grouting pipeline 10 from being bent and deformed due to the downward pulling force of the feed pipe 500. At the same time, the feed pipe 500 can be restricted from shaking left and right during operation, and the stability of the quick-setting agent entering can be ensured.

[0039] In one embodiment, see Figure 1 and Figure 3The accelerator injection device may further include a support plate 220 and two support rods 230. The support rods 230 may be hollow rods to reduce the weight of the support rods 230. The two ends of the support rods 230 may be connected to the edge of the funnel 210 and the support plate 220, respectively. The accelerator injection device may further include a lifting mechanism 700 installed on the frame 100. The support plate 220 may be connected to the frame 100 through the lifting mechanism 700. The lifting mechanism 700 may be used to adjust the distance from the support plate 220 to the frame 100. When the grouting pipeline 10 is higher than the ground in the coal mine, the lifting mechanism 700 drives the support plate 220 to drive the two support rods 230 to move upward, so that the feed pipe 500 can be connected to the end of the grouting pipeline 10 close to the slurry outlet 11. Of course, the lifting mechanism 700 can also drive the support plate 220 to move in the opposite direction. By setting the lifting mechanism 700, the accelerator injection device can adapt to grouting pipelines 10 at different heights from the ground.

[0040] For further information, see Figure 1 and Figure 3 The lifting mechanism 700 may include two screw rods 710 and two nuts 720. The two screw rods 710 may be respectively arranged on both sides of the support plate 220. The two sides of the support plate 220 and the two nuts 720 may be respectively sleeved on the two screw rods 710 and may be threadedly connected with the two screw rods 710. The two nuts 720 are rotated at the same time to push the support plate 220 to drive the funnel 210 and the feed pipe 500 to perform lifting and lowering movements relative to the frame 100, thereby ensuring that the two ends of the support plate 220 can move simultaneously relative to the screw rods 710, and ensuring the stability of the lifting and lowering movements of the feed pipe 500, the collecting hopper 400 and the driving member 300 driven by the funnel 210.

[0041] In one embodiment, there can be multiple grouting pipelines 10, which are respectively connected to the grouting main pipe through the three-way straight pipe of each inter-frame reversing valve. The concrete paste enters each grouting pipeline 10 after passing through the grouting main pipe. There can be multiple accelerator injection devices, which can be arranged one-to-one corresponding to the multiple grouting pipelines 10. The multiple grouting pipelines 10 inject concrete paste into the filling area at the same time, thereby improving the filling speed of the concrete paste.

[0042] See also Figure 4 According to a second aspect of an embodiment of the present disclosure, a method for injecting an accelerating setting agent is provided. The accelerating setting agent is injected through an accelerating setting agent injection device according to any one of the above embodiments. The method for injecting an accelerating setting agent may include:

[0043] Step 20 , connecting the feed pipe 500 to a position of the grouting pipeline 10 close to the slurry outlet 11 , so that the feed pipe 500 and one end of the grouting pipeline 10 close to the slurry outlet 11 are butted against each other.

[0044] Step 40, the quick-setting agent in the funnel 210 is transported to the grouting pipeline 10 in sequence in multiple times.

[0045] The accelerating agent injection method has all the beneficial effects of the accelerating agent injection device described above, which will not be described in detail here.

[0046] In one embodiment, see Figure 4 and Figure 5 , step 40 comprises:

[0047] Step 401 , controlling the driving member 300 to drive the aggregate hopper 400 to move downward in the funnel 210 , disconnecting the aggregate hopper 400 from the feed pipe 500 , and allowing part of the quick-setting agent in the funnel 210 to fall into the aggregate hopper 400 .

[0048] Step 402 , controlling the driving member 300 to drive the aggregate hopper 400 to move upward in the funnel 210 , the aggregate hopper 400 can be connected to the feed pipe 500 , and the quick-setting agent in the aggregate hopper 400 can be pushed into the feed pipe 500 and transported to the grouting pipeline 10 .

[0049] Repeat the above steps for several times until the grouting pipeline 10 no longer injects concrete paste into the filling area. Accelerator is added to the concrete paste during transportation. As described above, the amount and injection speed of the accelerator injected each time can be controlled, so that the concrete paste and the accelerator can be evenly mixed. The accelerator and concrete paste are mixed in the grouting pipeline 10 to avoid the dispersion of accelerator dust during the mixing process, which is beneficial for preventing dust. After the filling operation, clean the accelerator injection device for next use.

[0050] The grout outlet 11 of the grouting pipeline 10 passes through the through hole of the isolation frame and communicates with the area to be filled. Figure 3 and Figure 4 In this embodiment, before the step of controlling the driving member 300 to drive the aggregate hopper 400 to move downward in the funnel 210, the quick-setting agent injection method includes:

[0051] Step 30: transport the concrete paste in the area to be filled from a position away from the isolation frame to the isolation frame position for stacking and connecting the concrete paste.

[0052] It is understandable that in the filling area, the filling operation is carried out from far to near. No accelerator is added when the concrete paste is stacked and connected to the top at the far end, and the accelerator is added when the concrete paste begins to be stacked and connected along the isolation frame: first, the solidification speed and paste strength of the concrete paste near the isolation frame are quickly increased, and the role of the accelerator is fully exerted to prevent the concrete paste in the filling area from flowing out of the filling area through the through holes of the isolation frame, that is, to avoid slurry leakage. By adding the accelerator, the solidification cycle of the concrete paste is shortened, and then the cycle of the concrete paste filling operation is shortened, which is beneficial to improving the design output of the filling operation, quickly improving the strength of the concrete paste, and is more beneficial to the safety management of the top plate, creating a safe working environment for the operators; second, while effectively playing the key role of the accelerator, the amount of the accelerator is reduced to achieve cost reduction and efficiency improvement.

[0053] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0054] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0055] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A device for injecting an accelerating agent, characterized in that: include: frame; A funnel is installed on the frame, wherein the funnel contains an accelerating setting agent; A driving member, mounted on the bottom of the funnel; A material collecting hopper is arranged in the hopper and connected to the driving shaft of the driving member; as well as A material delivery pipe is arranged between the grouting pipeline and the aggregate hopper, and the material delivery pipe is used to be connected to one end of the grouting pipeline close to the slurry outlet; The driving member drives the aggregate hopper to move up and down in the hopper so as to connect or disconnect the aggregate hopper with the material conveying pipe.

2. The quick-setting agent injection device according to claim 1, characterized in that: The quick-setting agent is in powder form, and the inner diameter of one end of the feed pipe close to the aggregate hopper is configured as a first bell mouth, the inner diameter of the first bell mouth gradually increases from top to bottom, the inner diameter of the aggregate hopper is larger than the inner diameter of the feed pipe, and a protrusion is provided in the aggregate hopper, and the protrusion can be inserted into the first bell mouth to push the quick-setting agent into the feed pipe.

3. The quick-setting agent injection device according to claim 1, characterized in that: The inner diameter of one end of the aggregate hopper close to the material delivery pipe is configured as a second bell mouth, the inner diameter of the second bell mouth gradually increases from bottom to top, and the bottom of the aggregate hopper is closed and connected to the driving shaft of the driving member.

4. The quick-setting agent injection device according to claim 1, characterized in that: The quick-setting agent injection device also includes a thread, one end of which is used to be fixedly connected to the grouting pipeline, and the other end is threadedly connected to the feed pipe; The quick-setting agent injection device also includes a mesh plate, which is installed in the thread, and the quick-setting agent enters the grouting pipeline through the mesh holes of the mesh plate.

5. The quick-setting agent injection device according to claim 4, characterized in that: The aperture size of the mesh gradually increases from bottom to top.

6. The quick-setting agent injection device according to claim 4, characterized in that: The mesh plate is connected to the material conveying pipe via a sealing ring, and the sealing ring is used to seal the gap between the mesh plate and the material conveying pipe.

7. The quick-setting agent injection device according to claim 1, characterized in that: The mounting portion of the driving member is threadedly connected to the bottom of the funnel.

8. The quick-setting agent injection device according to claim 1, characterized in that: The feed pipe is connected to the funnel through a plurality of connecting rods, the plurality of connecting rods are arranged at intervals in the up-down direction, the two ends of the connecting rods are fixed on the inner wall of the funnel and connected to the feed pipe through fasteners.

9. The quick-setting agent injection device according to any one of claims 1 to 8, characterized in that: The accelerator injection device also includes a support plate and two support rods, the two ends of the support rods are respectively connected to the edge of the funnel and the support plate, the accelerator injection device also includes a lifting mechanism installed on the frame, the support plate is connected to the frame through the lifting mechanism, and the lifting mechanism is used to adjust the distance from the support plate to the frame.

10. The quick-setting agent injection device according to claim 9, characterized in that: The lifting mechanism includes two screw rods and two nuts. The two screw rods are respectively arranged on both sides of the support plate. The two sides of the support plate and the two nuts are respectively sleeved on the two screw rods and threadedly connected with the two screw rods. The nuts are rotated to push the support plate to drive the funnel and the feed pipe to perform lifting and lowering movements relative to the frame.

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