Preparation device of high-purity quartz tube

Abstract

The utility model relates to the technical field of quartz tube preparation, in particular to a preparation device of a high-purity quartz tube, which comprises a discharge conical cylinder of a continuous melting furnace, a primary plastic assembly vertically arranged downwards along a channel in the continuous melting furnace, a forming furnace arranged below the continuous melting furnace, and a heat dissipation sleeve arranged between the continuous melting furnace and the forming furnace, a discharging conical cylinder of the continuous melting furnace is arranged on the heat dissipation sleeve in a supporting mode, a quartz tube shaping assembly is arranged in the forming furnace and arranged under the primary plastic assembly, and a cutting assembly used for fixing the length of a quartz tube is arranged under a discharging pipe on the lower portion of the forming furnace; inert gas is supplied to one side of the forming furnace through an inert gas tank. And the continuous melting furnace enables the primary molding of the quartz tube to be stable. The primary molding assembly is matched with the shaping assembly, so that deformation and defects of the quartz tube are avoided, and deformation and defects are reduced. And cooling and molding the quartz tube in an inert gas environment, and keeping stable molding of the quartz tube. The cutting assembly accurately cuts the quartz tube to a specified length, and the quartz tube is high in forming quality and stable in performance.

Description

Technical Field

[0001] This utility model relates to the field of quartz tube preparation technology, specifically to a device for preparing high-purity quartz tubes. Background Technology

[0002] Currently, high-efficiency tanks, as the core component of heat exchange systems, are widely used in many systems such as heat pumps, refrigeration, and HVAC. Their performance directly affects the energy efficiency, stability, and operating costs of the entire system.

[0003] However, traditional high-efficiency tanks with built-in single equal-diameter coils have limitations in terms of heat exchange performance, hydrodynamic performance, structure and reliability; they also have shortcomings such as limited pressure-bearing capacity and high economic cost. Summary of the Invention

[0004] In view of the shortcomings of the prior art and in order to solve the problems mentioned in the background art, the technical problem to be solved by this utility model is to provide a high-purity quartz tube preparation device that improves the overall performance of high-efficiency tanks by providing efficient heat exchange.

[0005] The technical problem to be solved by this utility model is achieved through the following technical solution: a high-purity quartz tube preparation apparatus, comprising a continuous melting furnace, the continuous melting furnace including a discharge cone, a channel for quartz tube forming at the lower opening of the discharge cone, a primary shaping component arranged vertically downward along the channel inside the continuous melting furnace, a forming furnace below the continuous melting furnace, a heat dissipation sleeve between the continuous melting furnace and the forming furnace, the discharge cone of the continuous melting furnace being supported on the heat dissipation sleeve, a quartz tube shaping component inside the forming furnace, the shaping component being located directly below the primary shaping component, a discharge pipe at the lower part of the forming furnace, and a cutting component for quartz tube length determination directly below the discharge pipe; an inert gas tank connected to one side of the forming furnace, the inert gas tank continuously supplying inert gas to the forming furnace. The continuous melting furnace ensures stable initial shaping of the quartz tube. The cooperation of the primary shaping component and the shaping component effectively avoids deformation and defects of the quartz tube, and at the same time, the shape can be better controlled, reducing the occurrence of deformation and defects. The quartz tubes are continuously supplied with inert gas through an inert gas tank, effectively preventing adverse reactions such as oxidation and maintaining the stability of the quartz tubes. A heat dissipation sleeve is installed between the continuous melting furnace and the forming furnace to initially dissipate heat from the continuous melting furnace, preventing the high temperature of the continuous melting furnace from affecting the forming furnace. A cutting assembly located at the bottom of the forming furnace precisely cuts the quartz tubes to the specified length as needed, thereby improving production efficiency and avoiding errors that may be caused by traditional cutting methods. The equipment operates efficiently, shortening the production cycle and improving production efficiency. The forming furnace is filled with inert gas, and the quartz tubes are cooled and formed in an inert gas environment, resulting in high-quality quartz tubes with stable performance.

[0006] As a further embodiment of this invention, the initial molding assembly includes a central rod fixed at one end to the top wall of the continuous melting furnace, and an initial molding tube coaxially arranged with the central rod at the bottom of the furnace. The central rod extends vertically downward through the initial molding tube, and an annular gap is formed between the outer wall of the central rod and the inner wall of the initial molding tube, which serves as the initial molding gap for the quartz tube body. The annular gap formed by the cooperation of the central rod and the initial molding tube creates a precise initial molding gap, controlling the thickness and shape of the tube body during the quartz tube molding process, effectively maintaining a uniform molding process, and adjusting the size of the annular gap according to actual needs to finely adjust the initial molding dimensions of the quartz tube.

[0007] As a further embodiment of this invention, the shaping assembly includes four shaping rollers evenly distributed around the outer wall of the initially molded quartz tube. These rollers are arranged in pairs facing each other. During the quartz tube's descent, the roller bodies are tangential to the surface of the quartz tube, and the pair of opposing rollers rotate towards each other. The shaping rollers are fixed to the inner wall of the forming furnace by corresponding positioning plates. A shaping force is applied evenly during the quartz tube's descent. This ensures uniform shaping of the quartz tube across its entire surface, avoiding shape defects or quality problems caused by localized unevenness. The tangential relationship between the shaping rollers and the quartz tube surface allows for precise control of the tube's shape. The opposing rotation of the rollers ensures that the quartz tube receives appropriate force during shaping, maintaining its structural stability and preventing unnecessary deformation or stress concentration.

[0008] As a further embodiment of this invention, the continuous melting furnace includes a furnace cylinder, a discharge cone positioned directly below the furnace cylinder with its smaller end pointing downwards, and a pre-forming tube connected to the smaller end of the discharge cone. The channel for forming the outer wall of the quartz tube is formed by the inner tube of the pre-forming tube. A top mounting hole is provided on the top wall of the forming furnace, and a heat dissipation sleeve is fitted into the top mounting hole. The downward-facing smaller end of the discharge cone better guides the molten material downwards, reducing potential stagnation or excessive heat loss during the flow of the molten material, and improving the overall melting efficiency. The forming channel formed by the inner tube of the pre-forming tube precisely controls the flow rate and direction of the molten material, ensuring that the outer wall of the quartz tube forms a more uniform and precise shape during the forming process. The heat dissipation sleeve initially dissipates the high-temperature heat generated by the continuous melting furnace, preventing the high-temperature environment from affecting the forming furnace.

[0009] As a further embodiment of this invention, the continuous melting furnace includes an outer shell and an inner furnace body enclosed by the outer shell. Heating rods are installed on the outer wall of the inner furnace body, and a furnace cover is provided on the top of the inner furnace body. A stirring assembly and a feeding assembly are installed on the furnace cover. The feeding assembly includes a first feeding hopper, a second feeding hopper, and a third feeding hopper installed on the furnace cover. All three feeding hoppers are conical, with open tops. The design of covering the outer wall of the inner furnace body with heating rods ensures more uniform heating of the entire furnace body, improving efficiency and uniformity during the melting process, thereby enhancing the quality of the formed products. The multiple conical feeding hoppers with open tops allow for the rapid addition of materials of different proportions and types, preventing material blockage during the feeding process and ensuring good material flowability.

[0010] As a further embodiment of this invention, the stirring assembly includes two stirring motors mounted on the furnace cover. Each stirring motor has a vertically downward-pointing stirring shaft extending into the continuous melting furnace, and stirring blades are mounted on the stirring shaft. The stirring assembly ensures thorough and uniform mixing of the materials within the furnace.

[0011] As a further embodiment of this invention, an inert gas tank and a forming furnace are provided with an inlet pipe, an inlet valve on the inlet pipe, a support at the bottom of the inert gas tank, an inlet at the bottom of the inert gas tank, an inlet pipe at the inlet, and an inlet valve on the inlet pipe. The inert gas tank is filled with liquid nitrogen or liquid argon. This provides an oxygen-free and water-free inert atmosphere for the preparation of quartz tubes, preventing oxygen or moisture in the air from adversely affecting the quality of the quartz tubes. The inert atmosphere effectively prevents the quartz tubes from reacting with air under high-temperature conditions, ensuring the purity and stability of the finished product.

[0012] As a further embodiment of this invention, the cutting assembly includes a horizontally arranged sliding arm, a slider on one side of the sliding arm, a slide rail slidably fitted below the slider, a telescopic cylinder on one side of the slider, the shaft end of the telescopic cylinder connected to the slider, a cutting blade vertically mounted at the free end of the sliding arm, a horizontal mounting groove at the free end of the sliding arm, a connecting hole passing through the horizontal mounting groove, a cutting motor mounted on the top surface of the free end of the sliding arm, the cutting motor shaft passing through the connecting hole, and the cutting blade parallel to the horizontal mounting groove, with an interference fit between the cutting motor shaft and the center hole of the cutting blade. The sliding fit between the sliding arm and the slide rail allows the cutting blade to move smoothly along a predetermined trajectory, improving cutting accuracy.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This preparation device includes a continuous melting furnace, which includes a discharge cone. A channel for quartz tube forming is provided at the lower opening of the discharge cone. A primary shaping component is provided inside the continuous melting furnace, arranged vertically downwards along the channel. A forming furnace is located below the continuous melting furnace, and a heat dissipation sleeve is provided between the continuous melting furnace and the forming furnace. The discharge cone of the continuous melting furnace is supported on the heat dissipation sleeve. A quartz tube shaping component is provided inside the forming furnace, positioned directly below the primary shaping component. A discharge pipe is provided at the bottom of the forming furnace, and a cutting component for quartz tube length determination is located directly below the discharge pipe. An inert gas tank is connected to one side of the forming furnace, continuously supplying inert gas to the forming furnace. The continuous melting furnace ensures stable initial shaping of the quartz tube. The primary shaping component and the shaping component work together to effectively avoid deformation and defects in the quartz tube, while allowing for better control over its shape, reducing the occurrence of deformation and defects. The continuous supply of inert gas to the quartz tube through the inert gas tank effectively avoids adverse reactions such as oxidation, maintaining the stability of the quartz tube. A heat dissipation sleeve is installed between the continuous melting furnace and the forming furnace to initially dissipate heat from the continuous melting furnace, preventing the high temperature of the continuous melting furnace from affecting the forming furnace. A cutting assembly located at the bottom of the forming furnace precisely cuts the quartz tubes to the specified length as needed, thereby improving production efficiency and avoiding errors that may occur with traditional cutting methods. The equipment operates efficiently, shortening the production cycle and increasing production efficiency. The forming furnace is filled with inert gas, and the quartz tubes cool and form in an inert gas environment, resulting in high-quality quartz tubes with stable performance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0016] Figure 3 This is a schematic diagram of the molding furnace structure of this utility model. Figure 1 ;

[0017] Figure 4 This is a schematic diagram of the molding furnace structure of this utility model. Figure 2 ;

[0018] Figure 5 This is a schematic diagram of the continuous melting furnace assembly structure of this utility model;

[0019] Figure 6 This is a schematic diagram of the continuous melting furnace structure of this utility model;

[0020] Figure 7 This is a schematic diagram of the internal structure of the continuous melting furnace of this utility model.

[0021] In the diagram: 1-Inert gas tank, 101-Gas supply pipeline, 111-Gas supply valve, 102-Inlet pipeline, 121-Inlet valve, 2-Feeding assembly, 3-Stirring assembly, 4-Continuous melting furnace, 401-Including furnace cylinder, 411-Outer shell, 412-Inner furnace body, 402-Discharge cone, 403-Heating rod, 5-Heat dissipation sleeve, 6-Forming furnace, 601-Discharge pipe, 7-Cutting assembly, 701-Cutting blade, 702-Cutting motor, 703-Sliding arm, 704-Telescopic cylinder, 705-Slide rail, 8-Quartz tube shaping assembly, 801-Positioning connecting plate, 802-Shaping roller, 9-Preliminary molding assembly, 901-Center rod, 902-Preliminary molding tube, 903-Preliminary molding gap. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] The serial numbers assigned to components in this document, such as "first," "second," etc., are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application...

[0024] Unless otherwise specified, "connection" includes both direct and indirect connections (links). In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," and "right,"

[0025] "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise"

[0026] The orientation or positional relationship indicated by the "clock hand" and other symbols is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the purpose of facilitating the description of this utility model and simplifying the description, and is not intended to 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, it should not be construed as a limitation of this utility model.

[0027] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature means that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature means that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] As attached Figure 1 - Appendix Figure 7 As shown, an apparatus for preparing high-purity quartz tubes includes a continuous melting furnace 4.

[0029] The continuous melting furnace includes an outer shell 411 and an inner furnace body 412 enclosed by the outer shell. Heating rods 403 are provided on the outer wall of the inner furnace body. In operation, the heating rods heat the furnace, causing the temperature inside to rise. The melting temperature is generally between 700℃ and 1800℃.

[0030] The inner furnace body is equipped with a furnace cover on top, on which a stirring assembly 3 and a feeding assembly 2 are mounted. The feeding assembly includes a first feeding hopper, a second feeding hopper, and a third feeding hopper installed on the furnace cover. All three feeding hoppers are conical hoppers with open tops. Different reactants are quantitatively added to the inner furnace body through the three feeding hoppers, ensuring smooth material input without any residue.

[0031] After ensuring all quartz material has been added, the stirring assembly 3 includes two stirring motors mounted on the furnace cover. Each stirring motor has a vertically downward-pointing stirring shaft that extends into the continuous melting furnace. Stirring blades are mounted on the stirring shaft. When the stirring motors are started, the motor shafts drive the stirring blades to stir the material evenly. The quartz material is continuously stirred and uniformly melted as it melts.

[0032] The continuous melting furnace includes a discharge cone 402 and a furnace cylinder 401. The discharge cone is located directly below the furnace cylinder. After the quartz material is melted, it is temporarily stored in the discharge cone and the furnace cylinder.

[0033] A channel for forming quartz tubes is provided at the lower opening of the discharge cone. A primary molding assembly 9 is vertically arranged downwards along the channel inside the continuous melting furnace. The smaller end of the discharge cone is downwards and connected to a primary molding tube 902. The channel for forming the outer wall of the quartz tube is formed by the inner tube of the primary molding tube. The primary molding assembly includes a central rod 901 fixed at one end to the top wall of the continuous melting furnace. A primary molding tube, coaxial with the central rod, is located at the bottom of the continuous melting furnace. The central rod extends vertically downwards through the primary molding tube. An annular gap 903 is formed between the outer wall of the central rod and the inner wall of the primary molding tube, which is the primary molding gap of the quartz tube body. The dimensions of the central rod and the primary molding tube are adjusted according to actual needs to obtain quartz tubes with varying wall thicknesses and diameters.

[0034] The quartz melts at high temperature into liquid quartz, which flows along the gap between the initial plastic parts to form a hollow quartz tube. The hollow quartz tube continues to fall under gravity.

[0035] A forming furnace 6 is located below the continuous melting furnace. A heat dissipation sleeve 5 is installed between the continuous melting furnace and the forming furnace. The top wall of the forming furnace has a top mounting hole, and the heat dissipation sleeve 5 is fitted with the top mounting hole. The discharge cone of the continuous melting furnace is supported on the heat dissipation sleeve. The continuous melting furnace continuously heats up to form a high-temperature furnace body, which has a certain impact on the performance and structure of the surrounding equipment. The heat dissipation sleeve, which is in direct contact with the continuous melting furnace, can buffer the high temperature of the furnace body for a certain period of time, avoid direct contact between the continuous melting furnace and the forming furnace, and prevent the forming furnace from being melted and deformed by the high temperature.

[0036] The molding furnace is equipped with a quartz tube shaping assembly 8, which is located directly below the initial molding assembly. The shaping assembly includes four shaping rollers 802 evenly distributed around the outer wall of the initially molded quartz tube. These rollers are arranged in pairs facing each other. After the quartz tube is initially formed by the initial molding assembly, it falls continuously under gravity. The rollers are tangential to the surface of the quartz tube, and the pair of opposing shaping rollers rotate towards each other. The shaping rollers are fixed to the inner wall of the molding furnace by corresponding positioning plates 801. During the cooling process, the quartz tube is reshaped by the shaping rollers.

[0037] An inert gas tank 1 is connected to one side of the forming furnace. An inlet pipe 102 is provided between the inert gas tank and the forming furnace. An inlet valve 121 is provided on the inlet pipe. A support is provided at the bottom of the inert gas tank. An inlet is provided at the bottom of the inert gas tank. An inlet pipe 101 is provided at the inlet, and an inlet valve 111 is provided on the inlet pipe. The inert gas tank is filled with liquid nitrogen or liquid argon. When the inlet valve is opened, the inert gas tank continuously supplies inert gas to the forming furnace. Liquid nitrogen or liquid argon is pumped into the inert gas tank for storage along the inlet pipe.

[0038] Before the quartz tube falls into the molding furnace, the inlet valve 121 is opened to introduce inert gas from the inert gas tank into the molding furnace 6. During the process of the quartz tube falling into the molding furnace 6, it is in an inert gas state, isolating the initially molded quartz tube from the air, preventing the quartz surface from reacting with oxygen, and ensuring the purity and transparency of the quartz tube. The flow of inert gas ensures uniform molding of the quartz tube and improves the molding strength.

[0039] The lower part of the molding furnace is equipped with a discharge pipe 601. After the quartz tube is continuously cooled, it falls along the discharge pipe and is completely cooled and shaped to form the finished product.

[0040] A cutting assembly for fixing the length of the quartz tube is provided directly below the discharge pipe; the cutting assembly 7 includes a horizontally arranged sliding arm 703, a slider on one side of the sliding arm, a slide rail 705 slidably fitted below the slider, a telescopic cylinder 704 on one side of the slider, the shaft end of the telescopic cylinder being connected to the slider, a cutting blade vertically provided at the free end of the sliding arm, a horizontal mounting groove provided at the free end of the sliding arm, a connecting hole passing through the horizontal mounting groove, a cutting motor 702 provided on the top surface of the free end of the sliding arm, the cutting motor shaft passing through the connecting hole, and the cutting blade 701 being arranged parallel to each other in the horizontal mounting groove, with the cutting motor shaft and the center hole of the cutting blade being interference-fitted.

[0041] As the quartz tube falls along the discharge pipe, manually hold the quartz tube. At the cutting line where the quartz tube needs to be cut into segments, align the cutting blade with the cutting line and start the cutting motor to drive the cutting blade to rotate.

[0042] Next, the telescopic cylinder is activated, and the cylinder shaft extends to drive the slider to move closer to the quartz tube. The cutting blade contacts the outer wall of the quartz tube and moves along the cutting line to cut.

[0043] After cutting is completed, the cutting motor is turned off, and the telescopic cylinder shaft retracts to its initial position, ready for the next cut. The quartz tubes cut each time are then safely transferred, completing the quartz tube preparation process.

[0044] In the description of this specification, the terms "connection," "installation," "fixing," and "setting," etc., are interpreted broadly. For example, "connection" can mean a fixed connection or an indirect connection via intermediate components without affecting the relationship between components and the technical effect; it can also mean an integral connection or a partial connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model or utility model according to the specific circumstances. The above description is only a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. An apparatus for preparing high-purity quartz tubes, characterized in that: The system includes a continuous melting furnace (4), which includes a discharge cone (402). A channel for quartz tube forming is provided at the lower end of the discharge cone. A primary molding component (9) is provided in the continuous melting furnace and is arranged vertically downward along the channel. A forming furnace (6) is provided below the continuous melting furnace. A heat dissipation sleeve (5) is provided between the continuous melting furnace and the forming furnace. The discharge cone (402) of the continuous melting furnace is supported on the heat dissipation sleeve. A quartz tube shaping component (8) is provided in the forming furnace. The shaping component is located directly below the primary molding component. A discharge pipe (601) is provided at the lower part of the forming furnace. A cutting component (7) for quartz tube length setting is provided directly below the discharge pipe. An inert gas tank (1) is connected to one side of the forming furnace. The inert gas tank continuously supplies inert gas to the forming furnace.

2. The apparatus for preparing a high-purity quartz tube according to claim 1, characterized in that: The primary molding component (9) includes a central rod (901) fixed at one end on the top wall of the continuous melting furnace, and a primary molding tube (902) coaxially arranged with the central rod at the bottom of the continuous melting furnace. The central rod extends vertically downward through the primary molding tube, and the annular gap formed between the outer wall of the central rod and the inner wall of the primary molding tube is the primary molding gap (903) of the quartz tube body.

3. The apparatus for preparing a high-purity quartz tube according to claim 2, characterized in that: The shaping component (8) includes shaping rollers (802) evenly distributed around the outer wall of the pre-molded quartz tube. There are four shaping rollers (802), which are arranged in pairs opposite each other. During the quartz tube's descent, the shaping roller body is tangential to the surface of the quartz tube, and the pair of shaping rollers rotate in opposite directions. The shaping rollers are fixed to the inner wall of the molding furnace by corresponding positioning plates (801).

4. The apparatus for preparing a high-purity quartz tube according to claim 2, characterized in that: The continuous melting furnace (4) includes a furnace cylinder (401), a discharge cone (402) is located directly below the furnace cylinder, the small end of the discharge cone is set downwards, the small end of the discharge cone is connected to a primary plastic forming tube (902), the channel for forming the outer wall of the quartz tube is formed by the inner tube of the primary plastic forming tube, a top mounting hole is provided on the top wall of the forming furnace, and a heat dissipation sleeve (5) is set in conjunction with the top mounting hole.

5. The apparatus for preparing a high-purity quartz tube according to claim 3, characterized in that: The continuous melting furnace includes an outer shell (411) and an inner furnace body (412) enclosed by the outer shell. Heating rods (403) are provided on the outer wall of the inner furnace body. A furnace cover is provided on the top of the inner furnace body. A stirring assembly (3) and a feeding assembly (2) are provided on the furnace cover. The feeding assembly includes a first feeding hopper, a second feeding hopper and a third feeding hopper installed on the furnace cover. The first feeding hopper, the second feeding hopper and the third feeding hopper are all conical feeding hoppers with open tops.

6. The apparatus for preparing a high-purity quartz tube according to claim 5, characterized in that: The stirring assembly (3) includes two stirring motors installed on the furnace cover. The stirring motor shafts are vertically downward and have stirring shafts that extend into the continuous melting furnace. The stirring shafts are equipped with stirring blades.

7. The apparatus for preparing a high-purity quartz tube according to claim 4, characterized in that: An inlet pipe (102) is provided between the inert gas tank (1) and the forming furnace (6). An inlet valve (121) is provided on the inlet pipe. A support is provided at the bottom of the inert gas tank (1). An air outlet is provided at the bottom of the inert gas tank. An air outlet pipe (101) is provided at the air outlet. An air outlet valve (111) is provided on the air outlet pipe. The inert gas tank is filled with liquid nitrogen or liquid argon.

8. The apparatus for preparing a high-purity quartz tube according to claim 4, characterized in that: The cutting assembly (7) includes a horizontally arranged sliding arm (703), a slider on one side of the sliding arm, a slide rail (705) slidably fitted below the slider, a telescopic cylinder (704) on one side of the slider, the shaft end of the telescopic cylinder being connected to the slider, a cutting blade (701) vertically arranged at the free end of the sliding arm, a horizontal mounting groove at the free end of the sliding arm, a connecting hole passing through the horizontal mounting groove, a cutting motor (702) on the top surface of the free end of the sliding arm, the cutting motor shaft passing through the connecting hole, the cutting blade being arranged parallel to the horizontal mounting groove, and the cutting motor shaft and the center hole of the cutting blade being interference-fitted.

Images