A sealing device
By designing automated sealing equipment, which utilizes robotic arms and sand-filling mechanisms to automate the filling and cleaning of sealing sand, the problem of low efficiency in manual operation is solved, and the production efficiency of the ring furnace and the quality of the sealing sand are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- MASCH TECH DEV CO LTD
- Filing Date
- 2023-09-22
- Publication Date
- 2026-05-26
AI Technical Summary
In existing technologies, the cleaning and screening of sealing sand in ring furnaces mainly relies on manual operation, which is inefficient and the high ambient temperature results in a heavy workload and low production efficiency.
Design a sealing device that uses a robotic arm and a sand filling mechanism. The robotic arm adjusts the axial position of the rotating arm to achieve automated filling and cleaning of sealing sand. Combined with a sand suction mechanism, separator, vibrating screen, bag filter and iron remover, the sealing sand is automatically screened and stored.
It has achieved automated sealing operations, reduced manual labor, improved production efficiency, and improved the quality and utilization efficiency of sealing sand through automatic screening and storage.
Smart Images
Figure CN117213231B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of steel production equipment technology, and in particular to a sealing device. Background Technology
[0002] When heating steel coils in a ring furnace, an insulation cover needs to be added to the outside. Quartz sand, known as sealing sand, is needed to seal the space between the insulation cover and the furnace platform. Each time a steel coil is produced from the ring furnace, the existing sealing sand needs to be cleaned out before adding new sealing sand for the next coil heating cycle. Currently, the cleaning and screening of the sealing sand are done manually, which is inconvenient, inefficient, and occurs in high-temperature environments. Therefore, there is an urgent need for a sealing device that can replace manual labor in the sealing process, reducing the workload and improving production efficiency. Summary of the Invention
[0003] To achieve the above objectives, this application provides a sealing device that can replace manual sealing operations, thereby reducing workload and improving production efficiency.
[0004] This application provides a sealing device, comprising: a robotic arm having a column, a folding arm, and a rotating arm, one end of the folding arm being fixed to the column, the rotating arm being disposed at the other end of the folding arm, the rotating arm rotating about a vertical axis, the folding arm driving the rotating arm to move and change the position of the axis; and a sand filling mechanism having a sand filling pipe, the sand outlet of the sand filling pipe being disposed on the rotating arm and offset from the axis.
[0005] Using the above structure, when the steel coil is placed on the furnace platform and the insulation cover is placed in the sealing groove of the furnace platform to seal the steel coil, the sealing equipment can adjust the position of the rotating arm's axis by using a folding arm, so that the axis of the rotating arm coincides with the axis of the sealing groove. Then, the rotating arm rotates, causing the sand outlet to move along the sealing groove. The sealing sand output from the sand outlet can fill the sealing groove, thereby achieving a seal on the insulation cover. Thus, the sealing equipment can replace manual sealing operations, reducing the workload and improving production efficiency.
[0006] In some embodiments, the rotating arm includes: a rotating disk disposed at the other end of the folding arm; and a first rotating arm, one end of which is disposed on the rotating disk and rotates about the axis.
[0007] With the above structure, the first rotating arm can be driven to rotate by a rotating disk so that the sand outlet can move along the sealing groove.
[0008] In some embodiments, the rotating arm further includes a second rotating arm, one end of which is disposed at the other end of the first rotating arm and hinged to the first rotating arm, and the sand outlet is disposed on the second rotating arm.
[0009] With the above structure, the sand outlet is hinged to the first rotating arm and positioned on the second rotating arm. This allows adjustment of the sand outlet's rotation radius as the rotating arm rotates, enabling it to move along the sealing groove and ensuring that the sealing sand output from the outlet fills the sealing groove. Furthermore, the second rotating arm also allows for adjustment of the sand outlet's rotation radius, accommodating sealing grooves of different diameters and thus expanding the adaptability of the sealing equipment.
[0010] In some embodiments, the folding arm includes: a first folding arm, one end of which is hinged to the column; a second folding arm, one end of which is hinged to the other end of the first folding arm; and a rotating arm disposed on the second folding arm.
[0011] With the above structure, by setting a first folding arm and a second folding arm, the position of the rotating arm can be adjusted by rotating the first folding arm and the second folding arm, that is, the position of the axis of the rotating arm can be adjusted so that the axis of the rotating arm coincides with the axis of the sealing groove.
[0012] In some embodiments, the sand filling mechanism further includes a screw conveyor, which is disposed on the sand filling pipeline and drives the sealing sand in the sand filling pipeline to move.
[0013] Using the above structure, the sealing sand in the sand-filled pipeline can be moved by a screw conveyor, thereby completing the transportation of the sealing sand.
[0014] In some embodiments, the sand-filling pipeline includes: a first pipeline disposed on the first folding arm and extending along the first folding arm; and a second pipeline disposed on the second folding arm and extending along the second folding arm; wherein the outlet of the first pipeline and the inlet of the second pipeline are located at the hinge position of the first folding arm and the second folding arm, and the outlet of the first pipeline is located above the inlet of the second pipeline.
[0015] By adopting the above structure, and by extending the first pipeline along the first folding arm and the second pipeline along the second folding arm, the size of the equipment can be reduced, making the equipment more compact and improving the flexibility of the folding arm.
[0016] In some embodiments, the sand-filling pipeline further includes a third pipeline disposed on the rotating arm, wherein the inlet of the third pipeline is located at the axial center of the rotating arm and below the outlet of the second pipeline.
[0017] By employing the above structure and placing the third pipe on the rotating arm, the third pipe can rotate with the rotating arm. Simultaneously, by positioning the inlet of the third pipe at the axis of the rotating arm, below the outlet of the second pipe, the inlet and outlet positions of the third pipe remain unchanged in the vertical direction as the rotating arm rotates.
[0018] In some embodiments, a sand suction mechanism is further included, comprising: a sand suction pipe arranged along the folding arm and the rotating arm, the inlet of the sand suction pipe being located on the rotating arm, and a high-pressure fan being provided on the sand suction pipe; a separator connected to the outlet of the sand suction pipe for filtering the sealing sand; a vibrating screen located below the outlet of the separator for screening the sealing sand; a bag filter connected to the vibrating screen for depositing the sealing sand; an iron remover connected to the bag filter for separating iron oxide from the sealing sand; and a sealing sand storage tank connected to the iron remover for storing the sealing sand.
[0019] With the above structure, by setting up sand suction pipes along the folding arm and rotating arm, the sealing sand in the sealing groove can be cleaned after heating by aligning the axis of the rotating arm with the axis of the sealing groove. The rotating arm then drives the sand suction pipes to suck up and clean the sealing sand in the sealing groove. This replaces manual cleaning of the sealing sand, thereby improving production efficiency.
[0020] In addition, by installing a separator, vibrating screen, bag filter, and iron remover, the sealing sand sucked up by the sand suction pipe can be screened to remove impurities. The screened sealing sand can be stored in a sealing sand storage tank for convenient use next time.
[0021] In some embodiments, the sand filling mechanism further includes a hoist, which is disposed on the sealing sand storage tank and transports the sealing sand in the sealing sand storage tank. The outlet of the hoist is located above the sand inlet of the sand filling pipeline.
[0022] With the above structure, when it is necessary to fill the sealing groove with sealing sand to seal the insulation cover, the sealing sand stored in the sealing sand storage tank can be transported to the sand inlet of the sand filling pipeline by the hoist, so that the sealing sand falls into the sand inlet and is filled into the sealing groove through the sand filling pipeline to seal the insulation cover.
[0023] In some embodiments, the sealed sand storage tank is provided with a new material addition port.
[0024] By adopting the above structure and setting a new material addition port on the sealing sand storage tank, sealing sand can be added to the sealing sand storage tank through the new material addition port when the sealing sand is insufficient due to repeated use. This ensures that enough sealing sand can be filled when filling the sealing groove to seal the heat insulation cover, thereby improving the sealing effect.
[0025] These and other aspects of the invention will become more apparent from the following description of several embodiments. Attached Figure Description
[0026] The various features of the present invention and the relationships between them are further explained below with reference to the accompanying drawings. The drawings are exemplary; some features are not shown to scale, and some drawings may omit conventional features in the field of this application that are not essential to this application, or additional features that are not essential to this application may be shown. The combination of features shown in the drawings is not intended to limit the present application. Furthermore, throughout this specification, the same reference numerals refer to the same things. Specific descriptions of the drawings are as follows:
[0027] Figure 1 This is a schematic diagram of the front orthographic projection of the sealing device in this application;
[0028] Figure 2 for Figure 1 Schematic diagram of the side structure of the intermediate sealing device;
[0029] Figure 3 for Figure 1 A schematic diagram of the top orthographic projection structure of the sealing device.
[0030] Explanation of reference numerals in the attached figures
[0031] 10 Sealing equipment; 20 Furnace platform; 21 Sealing groove; 30 Insulation cover; 100 Robotic arm; 110 Column; 120 Folding arm; 121 First folding arm; 122 Second folding arm; 130 Rotating arm; 131 Rotary disc; 132 First rotating arm; 133 Second rotating arm; 200 Sand filling mechanism; 210 Sand filling pipeline; 211 Sand outlet; 212 First pipeline; 213 Second pipeline; 214 Third pipeline; 215 Sand inlet; 220 Screw conveyor; 230 Elevator; 300 Sand suction mechanism; 310 Sand suction pipeline; 311 Sand suction port; 320 Separator; 330 Vibrating screen; 340 Bag dust collector; 350 Iron remover; 360 Sealing sand storage tank; 370 New material addition port. Detailed Implementation
[0032] The terms "first, second, third, etc." or similar terms such as module A, module B, module C, etc., used in the specification and claims are only used to distinguish similar objects and do not represent a specific ordering of objects. It is understood that a specific order or sequence may be interchanged where permitted so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.
[0033] In the following description, the labels of the steps, such as S110, S120, etc., do not necessarily mean that the steps will be executed in this way. The order of the steps can be interchanged or executed simultaneously if permitted.
[0034] The term "comprising" as used in the specification and claims should not be construed as limiting itself to what follows; it does not exclude other elements or steps. Therefore, it should be interpreted as specifying the presence of the mentioned feature, integral, step, or component, but does not exclude the presence or addition of one or more other features, integrals, steps, or components, or groups thereof. Thus, the statement "device comprising means A and B" should not be limited to a device consisting solely of components A and B.
[0035] The term "an embodiment" or "an embodiment" as used in this specification means that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in at least one embodiment of the invention. Therefore, the terms "in one embodiment" or "in an embodiment" appearing throughout this specification do not necessarily refer to the same embodiment, but may refer to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics can be combined in any suitable manner, as will be apparent to those skilled in the art from this disclosure.
[0036] The specific structure of the sealing device 10 in this application will now be described in detail with reference to the accompanying drawings.
[0037] Figure 1 This is a schematic diagram of the front orthographic projection of the sealing device 10 in this application; Figure 2 for Figure 1 Schematic diagram of the side structure of the sealing device 10; Figure 3 for Figure 1 A schematic diagram of the top orthographic projection structure of the sealing device 10. (See attached diagram.) Figure 1 , Figure 2 , Figure 3As shown, the sealing device 10 in this application includes a robotic arm 100 and a sand-filling mechanism 200. The robotic arm 100 has a column 110, a folding arm 120, and a rotating arm 130. One end of the folding arm 120 is fixed to the column 110, and the rotating arm 130 is located at the other end of the folding arm 120. The rotating arm 130 rotates around a vertical axis, and the folding arm 120 drives the rotating arm 130 to move, changing the position of the axis. The sand-filling mechanism 200 has a sand-filling pipe 210, and the sand outlet 211 of the sand-filling pipe 210 is located on the rotating arm 130, offset from the axis.
[0038] Therefore, when the steel coil is placed on the furnace platform 20 and the insulation cover 30 is placed in the sealing groove 21 of the furnace platform 20 to seal the steel coil, the sealing device 10 can adjust the position of the axis of the rotating arm 130 by using the folding arm 120, so that the axis of the rotating arm 130 coincides with the axis of the sealing groove 21. Then the rotating arm 130 rotates, causing the sand outlet 211 to move along the sealing groove 21. The sealing sand output from the sand outlet 211 can fill the sealing groove 21, thereby achieving a seal on the insulation cover 30. Thus, the sealing device 10 can replace manual sealing operations, reducing the workload and improving production efficiency.
[0039] like Figure 1 As shown, the rotating arm 130 includes a rotating disk 131 and a first rotating arm 132. The rotating disk 131 is located at the other end of the folding arm 120, and one end of the first rotating arm 132 is mounted on the rotating disk 131. The axis of the rotating disk 131 is the axis of the first rotating arm 132, and the first rotating arm 132 rotates around this axis. Therefore, the rotating disk 131 can drive the first rotating arm 132 to rotate, allowing the sand outlet 211 to move along the sealing groove 21.
[0040] like Figure 1 As shown, the rotating arm 130 also includes a second rotating arm 133. One end of the second rotating arm 133 is hinged to the other end of the first rotating arm 132, and the sand outlet 211 is disposed on the second rotating arm 133. Thus, by hinged the second rotating arm 133 to the first rotating arm 132 and placing the sand outlet 211 on the second rotating arm 133, the rotation radius of the sand outlet 211 as it rotates with the rotating arm 130 can be adjusted, allowing the sand outlet 211 to move along the sealing groove 21, thereby ensuring that the sealing sand output from the sand outlet 211 fills the sealing groove 21. Furthermore, the rotation radius of the sand outlet 211 as it rotates with the rotating arm 130 can also be adjusted via the second rotating arm 133, allowing it to adapt to sealing grooves 21 of different diameters, thereby improving the adaptability of the sealing device 10.
[0041] like Figure 1 , Figure 3As shown, the folding arm 120 includes a first folding arm 121 and a second folding arm 122. One end of the first folding arm 121 is hinged to the column 110, and one end of the second folding arm 122 is hinged to the other end of the first folding arm 121. A rotating arm 130 is disposed on the second folding arm 122. Thus, by setting the first folding arm 121 and the second folding arm 122, the position of the rotating arm 130 can be adjusted by rotating the first folding arm 121 and the second folding arm 122, that is, the position of the axis of the rotating arm 130 can be adjusted so that the axis of the rotating arm 130 coincides with the axis of the sealing groove 21.
[0042] Specifically, such as Figure 3 As shown, there are two furnace platforms 20, arranged in a straight line with the column 110. When it is necessary to fill the sealing groove 21 on the outer furnace platform 20 with sealing sand, the first folding arm 121 and the second folding arm 122 rotate to form... Figure 3 In the state shown in Mode 1, the first folding arm 121 and the second folding arm 122 are at 180°, and the rotating disk 131 is located above the outer furnace platform 20, so that the axis of the rotating disk 131 coincides with the axis of the sealing groove 21. When it is necessary to fill the sealing groove 21 on the inner furnace platform 20 with sealing sand, the first folding arm 121 and the second folding arm 122 rotate to form Figure 3 In Mode 2, the first folding arm 121 and the second folding arm 122 form an acute angle, and the rotating disk 131 is positioned above the outer furnace platform 20, so that the axis of the rotating disk 131 coincides with the axis of the sealing groove 21. When it is necessary to reset and return to the original state, the first folding arm 121 and the second folding arm 122 rotate, forming... Figure 3 In the state shown in Mode 3, the first folding arm 121 and the second folding arm 122 are folded and moved away from the furnace platform 20 to avoid affecting the operation on the furnace platform 20.
[0043] Meanwhile, in both Mode 1 and Mode 2, after the axis of the rotating disk 131 coincides with the axis of the sealing groove 21, before filling the sealing groove 21 with sand, the first rotating arm 132 rotates at a certain angle on the rotating disk 131, so that the other end of the first rotating arm 132 is directly above the sealing groove 21. The second rotating arm 133 rotates at a certain angle on the first rotating arm 132, so that the second rotating arm 133 remains in a vertical state. Thus, the second rotating arm 133 can be kept in a vertical state and rotate along the sealing groove 21 so that the sealing sand flowing out of the sand outlet 211 on the second rotating arm 133 falls into the sealing groove 21.
[0044] like Figure 1 As shown, the sand filling mechanism 200 also includes a screw conveyor 220, which is installed on the sand filling pipeline 210 and drives the sealing sand inside the sand filling pipeline 210 to move. Thus, the sealing sand can be conveyed by pushing the sealing sand in the sand filling pipeline 210 through the screw conveyor 220.
[0045] like Figure 1 As shown, the sand-filling pipeline 210 includes a first pipeline 212 and a second pipeline 213. The first pipeline 212 is disposed on the first folding arm 121 and extends along the first folding arm 121. The second pipeline 213 is disposed on the second folding arm 122 and extends along the second folding arm 122. The outlet of the first pipeline 212 and the inlet of the second pipeline 213 are located at the hinge position of the first folding arm 121 and the second folding arm 122. The outlet of the first pipeline 212 is located above the inlet of the second pipeline 213. A screw conveyor 220 is disposed on each of the first pipeline 212 and the second pipeline 213. Thus, by extending the first pipeline 212 along the first folding arm 121 and the second pipeline 213 along the second folding arm 122, the size of the equipment can be reduced, making the equipment more compact and improving the flexibility of the folding arm 120.
[0046] like Figure 1 As shown, the sand-filling pipe 210 also includes a third pipe 214, which is mounted on the rotating arm 130 and arranged along the first rotating arm 132 and the second rotating arm 133. The inlet of the third pipe 214 is located at the axial center of the rotating arm 130, below the outlet of the second pipe 213. Therefore, by mounting the third pipe 214 on the rotating arm 130, it can rotate with the rotating arm 130. Simultaneously, by positioning the inlet of the third pipe 214 at the axial center of the rotating arm 130, below the outlet of the second pipe 213, the inlet positions of the third pipe 214 and the outlet positions of the second pipe 213 remain unchanged in the vertical direction when the rotating arm 130 rotates.
[0047] like Figure 1 As shown, the sealing device 10 in this application also includes a sand suction mechanism 300, which includes a sand suction pipe 310, a separator 320, a vibrating screen 330, a bag filter 340, an iron remover 350, and a sealing sand storage tank 360. The sand suction pipe 310 is arranged along the folding arm 120 and the rotating arm 130, with its suction port 311 located on the rotating arm 130. A high-pressure fan is installed on the sand suction pipe 310. The separator 320 is connected to the outlet of the sand suction pipe 310 to filter the sealing sand. The vibrating screen 330 is located below the outlet of the separator 320 to screen the sealing sand. The bag filter 340 is connected to the vibrating screen 330 to deposit the sealing sand. The iron remover 350 is connected to the bag filter 340 to separate iron oxide from the sealing sand. The sealing sand storage tank 360 is connected to the iron remover 350 to store the sealing sand.
[0048] Specifically, a vacuum circuit is created in the sand suction pipe 310 by a high-pressure blower to achieve the back suction of sealing sand. The back suctioned sealing sand first enters the separator 320, which can be, for example, a cyclone separator, to filter out fine sand particles. The remaining sealing sand, after sedimentation in the separator 320, enters the vibrating screen 330 for further separation. Larger particles that cannot pass through the vibrating screen 330 flow out through the waste sand pipe located at the top of the vibrating screen 330 and are collected and processed by a waste cart. The sealing sand passing through the vibrating screen 330 enters the bag filter 340 for sedimentation. The processed sealing sand enters the iron remover 350, which can be a pipeline iron remover 350, to process and separate iron oxide, achieving separation. The separated sealing sand enters the sealing sand storage tank 360 through a pipeline. During the sand filling operation, the sealing sand is sent to the sealing tank 21 by the elevator 230 and the screw conveyor 220.
[0049] Therefore, by setting up a sand suction pipe 310 along the folding arm 120 and the rotating arm 130, when it is necessary to clean the sealing sand in the sealing groove 21 after heating, the folding arm 120 drives the axis of the rotating arm 130 to coincide with the axis of the sealing groove 21, and the rotating arm 130 drives the sand suction pipe 310 to suck up and clean the sealing sand in the sealing groove 21. This can replace manual cleaning of the sealing sand, thereby improving production efficiency.
[0050] In addition, by setting up a separator 320, a vibrating screen 330, a bag filter 340, and an iron remover 350, the sealing sand sucked up by the sand suction pipe 310 can be screened to remove impurities from the sealing sand. The screened sealing sand can be stored in the sealing sand storage tank 360 for convenient use next time.
[0051] like Figure 1 , Figure 2 As shown, the sand filling mechanism 200 also includes a hoist 230, which is mounted on the sealing sand storage tank 360 to transport the sealing sand from the tank. The outlet of the hoist 230 is located above the sand inlet 215 of the sand filling pipeline 210. Therefore, when it is necessary to fill the sealing groove 21 with sealing sand to seal the insulation cover 30, the hoist 230 can transport the sealing sand stored in the sealing sand storage tank 360 to above the sand inlet of the sand filling pipeline 210, allowing the sealing sand to fall into the inlet and then be filled into the sealing groove 21 along with the sand filling pipeline 210 to seal the insulation cover 30.
[0052] like Figure 1 As shown, the sealed sand storage tank 360 is equipped with a new material inlet 370. Specifically, the new material inlet 370 can be configured as follows: Figure 1The sealing sand is positioned close to the ground for easy access by workers to add it. Sealing sand added via the new material inlet 370 can be piped to the sealing sand storage tank 360, allowing the sand filling mechanism 200 to add it to the sealing groove 21. Therefore, by providing the new material inlet 370 on the sealing sand storage tank 360, when the sealing sand becomes insufficient due to repeated use, it can be added to the tank through the new material inlet 370. This ensures that sufficient sealing sand is added when filling the sealing groove 21 to seal the insulation cover 30, thereby improving the sealing effect.
[0053] Note that the above are merely preferred embodiments and the technical principles employed in this application. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present application has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, all of which fall within the scope of protection of the present invention.
Claims
1. A sealing device, characterized in that, Used for adding sealing sand to the sealing groove of an annular furnace; including: The robotic arm has a column, a folding arm and a rotating arm. One end of the folding arm is fixed to the column, and the rotating arm is disposed at the other end of the folding arm. The rotating arm rotates around a vertical axis. The folding arm drives the rotating arm to move, changing the position of the axis, so that the axis of the rotating arm coincides with the axis of the sealing groove. A sand filling mechanism, wherein the sand filling mechanism has a sand filling pipeline, and the sand outlet of the sand filling pipeline is disposed on the rotating arm and offset from the axis; The rotating arm includes a rotating disk, a first rotating arm, and a second rotating arm. The rotating disk is disposed at the other end of the folding arm. One end of the first rotating arm is disposed on the rotating disk and rotates around the axis. One end of the second rotating arm is disposed at the other end of the first rotating arm and hinged to the first rotating arm. The sand outlet is disposed on the second rotating arm. The folding arm includes a first folding arm and a second folding arm. One end of the first folding arm is hinged to the column. One end of the second folding arm is hinged to the other end of the first folding arm. The rotating arm is disposed on the second folding arm. The system also includes: The sand suction mechanism includes a sand suction pipe, a separator, a vibrating screen, a bag filter, an iron remover, and a sealing sand storage tank. The sand suction pipe is arranged along the folding arm and the rotating arm, with its inlet located on the rotating arm. A high-pressure fan is installed on the sand suction pipe. The separator is connected to the outlet of the sand suction pipe to filter the sealing sand. The vibrating screen is located below the outlet of the separator to screen the sealing sand. The bag filter is connected to the vibrating screen to deposit the sealing sand. The iron remover is connected to the bag filter to separate iron oxide from the sealing sand. The sealing sand storage tank is connected to the iron remover to store the sealing sand. The sand filling mechanism also includes a hoist, which is installed on the sealing sand storage tank to transport the sealing sand in the sealing sand storage tank. The outlet of the hoist is located above the sand inlet of the sand filling pipeline.
2. The sealing device according to claim 1, characterized in that, The sand-filling mechanism also includes: A screw conveyor is installed on the sand-filling pipe to drive the sealing sand inside the sand-filling pipe to move.
3. The sealing device according to claim 2, characterized in that, The sand-filled pipeline includes: A first conduit is disposed on the first folding arm and extends along the first folding arm; The second conduit is disposed on the second folding arm and extends along the second folding arm; The outlet of the first pipeline and the inlet of the second pipeline are located at the hinge position of the first and second folding arms, and the outlet of the first pipeline is located above the inlet of the second pipeline.
4. The sealing device according to claim 3, characterized in that, The sand-filled pipeline also includes: The third pipe is disposed on the rotating arm, and the inlet of the third pipe is located at the axis of the rotating arm, below the outlet of the second pipe.
5. The sealing device according to claim 1, characterized in that, The sealed sand storage tank is equipped with a new material addition port.