Recycled aluminum drying device

Abstract

The utility model relates to the technical field of secondary aluminum drying, in particular to a secondary aluminum drying device which comprises a drying mechanism, the drying mechanism comprises a workbench, a cylinder is fixedly connected to the position, close to one side, of the top end of the workbench, and two first U-shaped frames are fixedly connected to the outer wall of the cylinder around the axis of the cylinder at equal angles; a storage box is fixedly connected to the outer wall of one U-shaped frame, an aluminum block pouring-in mechanism is fixedly connected into the storage box, a vibration mechanism is fixedly connected to the position, close to the center, of the outer wall of the cylinder, and a hot air drying mechanism is fixedly connected to the position, located in the cylinder, of the vibration mechanism. A first square frame is fixedly connected to one side of the top end of the workbench, and an air heater is fixedly connected to the outer wall of the first square frame. According to the secondary aluminum cleaning device, by arranging the square plate, cleaned and wiped secondary aluminum can be placed on the square plate in the storage box, contact between dust and raw materials is effectively isolated, and frequent cleaning is not needed.

Description

Technical Field

[0001] The utility model relates to the technical field of recycled aluminum drying, in particular to a recycled aluminum drying device. Background Art

[0002] Recycled aluminum is made from scrap aluminum and aluminum-containing waste, which is re-smelted to extract aluminum alloy or pure aluminum metal. This is an important source of metallic aluminum, mainly in the form of aluminum alloy. Recycled aluminum needs to be dried before processing.

[0003] In order to make the surface of the raw materials heated evenly and ensure the stability of operation, the existing recycled aluminum drying device is equipped with multiple hot air blowers or dryers placed in different positions in the drying box, which leads to a significant increase in equipment cost, thereby reducing the market competitiveness of the equipment, and energy consumption also increases, increasing operating costs. Before drying the recycled aluminum, personnel are required to clean the surface to keep it clean. If the recycled aluminum is left for too long after cleaning, and the contact between impurities in the air and the recycled aluminum is not intercepted in time, dust will fall. Drying with impurities may affect the drying effect and even damage the product quality.

[0004] Useful content

[0005] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a recycled aluminum drying device. By providing a square plate, the cleaned and wiped recycled aluminum can be placed in the square plate in the storage box, which effectively isolates the contact between dust and raw materials and does not require frequent cleaning. The sealing cover is driven by a hydraulic rod to move downward along the first track of the U-shaped frame, and the second movement of the U-shaped frame pulls the square plate to move toward the inside of the cylinder, driving the recycled aluminum to be quickly delivered into the cylinder, effectively improving work efficiency, and avoiding contact with the recycled aluminum during the process, effectively maintaining cleanliness.

[0006] The purpose of this utility model can be achieved through the following technical solutions:

[0007] A recycled aluminum drying device comprises a drying mechanism, the drying mechanism comprises a workbench, a cylinder is fixedly connected to the top of the workbench near one side, and the outer wall of the cylinder is fixedly connected to two U-shaped frames 1 at equal angles around its axis, one of the U-shaped frames 1 is fixedly connected to the outer wall of a storage box, an aluminum block pouring mechanism is fixedly connected to the inside of the storage box, a vibration mechanism is fixedly connected to the outer wall of the cylinder near the center, a hot air drying mechanism is fixedly connected to the vibration mechanism at the inside of the cylinder, a square frame 1 is fixedly connected to one side of the top of the workbench, a hot air blower is fixedly connected to the outer wall of the square frame 1, the aluminum block pouring mechanism comprises a square frame 3, the outer wall of the square frame 3 is rotatably connected to the inner wall of one end of the storage box, a square hole 2 is opened on the outer wall of the square frame 3 near the center, a square hole 1 is opened on the bottom end of the storage box near the center, a U-shaped frame 2 is fixedly connected to the outer wall of the square frame 3, and a square plate is slidably inserted into the inside of the U-shaped frame 2.

[0008] Furthermore, a sealing cover is slidably inserted inside the U-shaped frame, a rotating seat 1 is fixedly connected to the bottom end of the square plate near the center, the rotating seat 1 is rotatably connected to a rotating rod, the other end of the rotating rod is rotatably connected to a rotating seat 2, the outer wall of the rotating seat 2 is fixedly connected to the outer wall of one of the sealing covers, a hydraulic rod is fixedly connected to the outer wall of one end of the sealing cover near the center, and the outer wall of the hydraulic rod is fixedly connected to the outer wall of the workbench.

[0009] Furthermore, springs 1 are fixedly connected between the outer wall of one end of the square frame 3 and the inner wall of the bottom end of the storage box near both sides.

[0010] Further, a square frame 2 is fixedly connected to the outer wall of the cylinder near the center position, the vibration mechanism includes a motor, the outer wall of the motor is fixedly connected to the outer wall of the square frame 2, the motor shaft of the motor is fixedly connected to a round rod, two arc-shaped protrusions are fixedly connected to the outer wall of the round rod at equal intervals, the outer wall of one end of the round rod is rotatably connected to a round tube, the outer wall of the round tube is fixedly connected to the outer wall of the cylinder, the outer wall of one end of the round tube is fixedly connected to a fixed bracket, the outer walls of both ends of the fixed bracket are fixedly connected to square frame 4, and a grid is slidably inserted between the inner walls of the two square frames 4.

[0011] Preferably: a second spring is fixedly connected between the fourth inner wall of the square frame and the outer wall of the grid.

[0012] Furthermore, the hot air drying mechanism includes an annular tube, the outer wall of the annular tube is rotatably connected to the outer wall of the circular tube, the outer wall of the annular tube is fixedly connected to the motor shaft of the motor, the outer wall of the circular tube is located inside the annular tube and has two circular holes 1 at equal angles around its axis, and one end of the hot air blower is fixedly connected to the outer wall of the circular hole 1 for air supply.

[0013] Preferably: a plurality of circular holes 2 are opened on the inner wall of the annular tube at equal angles around its axis, a boosting unit is fixedly connected to the inner wall of the annular tube at the circular hole 2, the boosting unit comprises a conical tube, a ring frame 1 is fixedly connected to the inside of the conical tube near one end, a ring frame 3 is fixedly connected to the inside of the conical tube near the other end, a ring frame 2 is slidably inserted between the inner wall of the conical tube and the ring frame 1, a spring 3 is fixedly connected between the outer walls of the ring frame 2 and the outer walls of the ring frame 3, and a circular hole 3 is opened on the outer wall of one end of the conical tube.

[0014] Beneficial effects of this utility:

[0015] 1. A cylinder is fixedly connected to the top of the workbench near one side, and two U-shaped frames are fixedly connected to the outer wall of the cylinder at equal angles around its axis, one of the U-shaped frames is fixedly connected to the outer wall of the storage box, an aluminum block pouring mechanism is fixedly connected inside the storage box, and a vibrating mechanism is fixedly connected to the outer wall of the cylinder near the center, and a hot air drying mechanism is fixedly connected to the vibrating mechanism at the inside of the cylinder, a square frame is fixedly connected to one side of the top of the workbench, and a hot air blower is fixedly connected to the outer wall of the square frame. The aluminum block pouring mechanism mainly includes a square frame three, the outer wall of the square frame three is rotatably connected to the inner wall of one end of the storage box, and a square hole two is opened near the center of the outer wall of the square frame three, and a square hole one is opened near the center of the bottom of the storage box, and the outer wall of the square frame three is fixedly connected to the U-shaped frame two, and a square plate is slidably inserted inside the U-shaped frame two. By providing the square plate, the cleaned and wiped recycled aluminum can be put into the square plate in the storage box, which effectively isolates the contact between dust and raw materials and does not require frequent cleaning.

[0016] 2. A sealing cover is inserted and slidably inserted inside the U-shaped frame 1, and a rotating seat 1 is fixedly connected to the bottom end of the square plate near the center. The rotating seat 1 is rotatably connected to a rotating rod, and a rotating seat 2 is rotatably connected to the other end of the rotating rod. The outer wall of the rotating seat 2 is fixedly connected to the outer wall of one of the sealing covers. A hydraulic rod is fixedly connected to the outer wall of one end of one of the sealing covers near the center, and the outer wall of the hydraulic rod is fixedly connected to the outer wall of the workbench. The sealing cover is driven by the hydraulic rod to move downward along the track of the U-shaped frame 1, and the U-shaped frame 2 is driven to move and pull the square plate to move into the cylinder, driving the recycled aluminum to be quickly delivered into the cylinder, effectively improving the work efficiency, and avoiding contact with the recycled aluminum during the process, effectively maintaining the cleanliness.

[0017] 3. Springs 1 are fixedly connected between the outer wall of the first end of the square frame 3 and the inner wall of the bottom end of the storage box near both sides. The sealing cover is driven by the hydraulic rod to move downward along the track of the U-shaped frame 1. When the square plate is driven to move to the specified position inside the cylinder, the hydraulic rod continues to drive, and the spring 1 is squeezed by pressure to tilt the square plate, so that the recycled aluminum on the square plate can be quickly slid out to the square frame 4, effectively improving work efficiency and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of the utility model from another perspective;

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the storage box in the utility model;

[0022] Figure 4 It is a schematic diagram of the structure of the aluminum block pouring mechanism in the utility model;

[0023] Figure 5 It is a schematic diagram of the partial structure of the drying mechanism in the utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the vibration mechanism in the utility model;

[0025] Figure 7 This is a schematic diagram of the cross-sectional structure of the ring tube in the utility model;

[0026] Figure 8 It is a schematic diagram of the structure of the boost unit in the utility model.

[0027] In the figure: 100, drying mechanism; 110, workbench; 111, square frame 1; 120, cylinder; 121, U-shaped frame 1; 122, sealing cover; 123, hydraulic rod; 125, square frame 2; 130, storage box; 131, square hole 1; 200, aluminum block pouring mechanism; 210, square frame 3; 211, U-shaped frame 2; 212, square hole 2; 213, square plate; 220, rotating seat 1; 221, rotating rod; 222, rotating seat 2; 230, spring 1; 300, Vibration mechanism; 310, motor; 311, round rod; 312, round tube; 313, round hole one; 314, arc-shaped protrusion; 320, fixed bracket; 321, square frame four; 322, spring two; 323, grid; 400, hot air drying mechanism; 410, ring tube; 411, round hole two; 420, booster unit; 421, conical tube; 422, ring frame one; 423, ring frame two; 424, ring frame three; 425, spring three; 426, round hole three; 500, hot air blower. DETAILED DESCRIPTION

[0028] The following will be combined with the practical embodiment to clearly and completely describe the technical solution in the practical embodiment. Obviously, the described embodiment is only a part of the practical embodiment, not all of the embodiments. Based on the embodiment in the practical, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this practical.

[0029] See also Figure 1-8 In an embodiment of the utility model, a recycled aluminum drying device includes a drying mechanism 100, and the drying mechanism 100 includes a workbench 110. A cylinder 120 is fixedly connected to the top of the workbench 110 near one side. The outer wall of the cylinder 120 is fixedly connected to two U-shaped frames 121 at equal angles around its axis. A storage box 130 is fixedly connected to the outer wall of one of the U-shaped frames 121. An aluminum block pouring mechanism 200 is fixedly connected to the storage box 130. A vibrating mechanism 300 is fixedly connected to the outer wall of the cylinder 120 near the center. The vibrating mechanism 300 is located on the cylinder 120. A hot air drying mechanism 400 is fixedly connected inside, a square frame 111 is fixedly connected to one side of the top of the workbench 110, a hot air blower 500 is fixedly connected to the outer wall of the square frame 111, and the aluminum block pouring mechanism 200 includes a square frame 3 210, the outer wall of the square frame 3 210 is rotatably connected to the inner wall of one end of the storage box 130, a square hole 212 is opened near the center of the outer wall of the square frame 3 210, a square hole 131 is opened near the center of the bottom end of the storage box 130, the outer wall of the square frame 3 210 is fixedly connected to a U-shaped frame 211, and a square plate 213 is slidably inserted inside the U-shaped frame 211.

[0030] A sealing cover 122 is slidably inserted inside the U-shaped frame 121, a rotating seat 1 220 is fixedly connected at the bottom end of the square plate 213 near the center, the rotating seat 1 220 is rotatably connected to a rotating rod 221, and the other end of the rotating rod 221 is rotatably connected to a rotating seat 222, the outer wall of the rotating seat 222 is fixedly connected to the outer wall of one of the sealing covers 122, a hydraulic rod 123 is fixedly connected to the outer wall of one end of one of the sealing covers 122 near the center, and the outer wall of the hydraulic rod 123 is fixedly connected to the outer wall of the workbench 110, and a spring 1 230 is fixedly connected between the outer wall of one end of the square frame 3 210 and the inner wall of the bottom end of the storage box 130 near both sides. A square frame 125 is fixedly connected to the outer wall of the cylinder 120 near the center position, and the vibration mechanism 300 includes a motor 310. The outer wall of the motor 310 is fixedly connected to the outer wall of the square frame 125. The motor shaft of the motor 310 is fixedly connected to a round rod 311. Two arc-shaped protrusions 314 are fixedly connected to the outer wall of the round rod 311 at equal intervals. A round tube 312 is rotatably connected to the outer wall of one end of the round rod 311. The outer wall of the round tube 312 is fixedly connected to the outer wall of the cylinder 120. A fixed bracket 320 is fixedly connected to the outer wall of one end of the round tube 312. The outer walls of both ends of the fixed bracket 320 are fixedly connected to square frames 321. A grid 323 is slidably inserted between the inner walls of the two square frames 321.

[0031] A spring 2 322 is fixedly connected between the inner wall of the square frame 4 321 and the outer wall of the grid frame 323. The hot air drying mechanism 400 includes a ring tube 410. The outer wall of the ring tube 410 is rotatably connected to the outer wall of the circular tube 312. The outer wall of the ring tube 410 is fixedly connected to the motor shaft of the motor 310. The outer wall of the circular tube 312 is located inside the ring tube 410 and has two circular holes 313 at equal angles around its axis. One end of the hot air blower 500 is fixedly connected to the outer wall of the circular hole 313. The inner wall of the ring tube 410 has a plurality of circular holes 411 at equal angles around its axis. The inner wall of the conical tube 421 is fixedly connected with a booster unit 420 at the circular hole 411, and the booster unit 420 includes a conical tube 421, a ring frame 1 422 is fixedly connected to the inner wall of the conical tube 421 near one end, a ring frame 3 424 is fixedly connected to the inner wall of the conical tube 421 near the other end, a ring frame 2 423 is slidably inserted between the ring frame 3 424 and the ring frame 1 422, a spring 3 425 is fixedly connected between the outer wall of the ring frame 2 423 and the outer wall of the ring frame 3 424, and a circular hole 3 426 is opened on the outer wall of one end of the conical tube 421.

[0032] Specifically, during operation, the cleaned and wiped recycled aluminum is placed on the square plate 213 in the storage box 130, which effectively isolates the contact between dust and raw materials, and does not require frequent cleaning. The hydraulic rod 123 drives the sealing cover 122 to move downward along the track of the U-shaped frame 121, driving the U-shaped frame 211 to move and pull the square plate 213 to move inside the cylinder 120, driving the recycled aluminum to be quickly sent into the cylinder 120. When the square plate 213 moves to the specified position, the hydraulic rod 123 continues to drive, and the spring 1 230 is squeezed by pressure to tilt the square plate 213, so that the recycled aluminum on the square plate 213 can be quickly slid out to the square frame 4 321, and the hydraulic rod 123 drives the sealing cover 12 2 moves upward back to the original position, the cylinder 120 is sealed, the motor 310 drives the round rod 311 to rotate, drives the arc-shaped protrusion 314 to rotate, and quickly lifts up and then drops the grid frame 323. The vibration generated can turn over the recycled aluminum block. The hot air blower 500 is driven to introduce hot air into the round tube 312, and then enter the inside of the ring tube 410 through the round hole 1 313. When the pressure inside the ring tube 410 accumulates to a certain level, the pressure will cause the ring frame 2 423 to separate from the ring frame 1 422. Subsequently, the gas enters the conical tube 421 and is ejected at the round hole 3 426. With the cooperation of the rotation of the ring tube 410, the recycled aluminum block on the grid frame 323 is dried.

[0033] Embodiment 1

[0034] like Figure 5-6 As shown, in this embodiment, a square frame 125 is fixedly connected to the outer wall of the cylinder 120 near the center position, and the vibration mechanism 300 includes a motor 310. The outer wall of the motor 310 is fixedly connected to the outer wall of the square frame 125. The motor shaft of the motor 310 is fixedly connected to a round rod 311. Two arc-shaped protrusions 314 are fixedly connected to the outer wall of the round rod 311 at equal intervals. A round tube 312 is rotatably connected to the outer wall of one end of the round rod 311. The outer wall of the round tube 312 is fixedly connected to the outer wall of the cylinder 120. A fixed bracket 320 is fixedly connected to the outer wall of one end of the round tube 312. The outer walls of both ends of the fixed bracket 320 are fixedly connected to square frames 321. A grid 323 is slidably inserted between the inner walls of the two square frames 321.

[0035] In this embodiment, the motor 310 drives the round rod 311 to rotate, driving the arc-shaped protrusion 314 to rotate, and quickly lifts up and then drops the grid 323. The generated vibration can turn over the recycled aluminum block, effectively improving the drying uniformity of the aluminum block surface.

[0036] like Figure 6 As shown, in this embodiment, a spring 2 322 is fixedly connected between the inner wall of the square frame 4 321 and the outer wall of the grid frame 323 .

[0037] During specific implementation, when the motor 310 drives the round rod 311 to rotate, the round rod 311 drives the arc-shaped protrusion 314 to move and lift the grid 323, and the spring 2 322 is squeezed. When the arc-shaped protrusion 314 separates from the bottom end of the grid 323, the spring 2 322 rebounds under pressure and drives the grid 323 to quickly collide with the surface of the square frame 4 321. The vibration is increased by the spring 2 322, making it easier for the recycled aluminum block to turn over, and a square fence is set around the grid 323 to prevent the recycled aluminum block near the edge of the grid 323 from detaching from the grid 323 due to the vibration and falling into the cylinder 120.

[0038] Embodiment 2

[0039] On the basis of the first embodiment, in order to make up for the more uniform drying of the recycled aluminum blocks in the first embodiment, a hot air drying mechanism 400 is provided.

[0040] like Figure 5-8 As shown, in this embodiment, the hot air drying mechanism 400 includes an annular tube 410, the outer wall of the annular tube 410 is rotatably connected to the outer wall of the circular tube 312, the outer wall of the annular tube 410 is fixedly connected to the motor shaft of the motor 310, the outer wall of the circular tube 312 is located inside the annular tube 410 and has two circular holes 313 around its axis at equal angles, one end of the hot air blower 500 is fixedly connected to the outer wall of the circular hole 313, the inner wall of the annular tube 410 is provided with a plurality of circular holes 411 around its axis at equal angles, and the inner wall of the annular tube 410 is located at the circular hole 412. A booster unit 420 is fixedly connected at 11, and the booster unit 420 includes a conical tube 421, a ring frame 1 422 is fixedly connected to the inside of the conical tube 421 near one end, a ring frame 3 424 is fixedly connected to the inside of the conical tube 421 near the other end, a ring frame 2 423 is slidably inserted between the inner wall of the conical tube 421 and the ring frame 1 422, a spring 3 425 is fixedly connected between the outer wall of the ring frame 2 423 and the outer wall of the ring frame 3 424, and a circular hole 3 426 is opened on the outer wall of one end of the conical tube 421.

[0041] In specific implementation, a hot air blower 500 is used to drive the hot air to enter the circular tube 312, and then enter the interior of the annular tube 410 through the circular hole 1 313. When the pressure inside the annular tube 410 accumulates to a certain level, the pressure will cause the ring frame 2 423 to separate from the ring frame 1 422. Subsequently, the gas enters the conical tube 421 and is ejected at the circular hole 3 426. With the cooperation of the rotation of the annular tube 410, the recycled aluminum blocks on the grid 323 are dried.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific characteristic structure materials or features described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific characteristic structure materials or features described can be combined in any one or more embodiments or examples in a suitable manner.

[0043] The above contents are merely examples and explanations of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the utility or exceed the scope defined in the claims, they should all fall within the protection scope of the present invention.

Claims

1. A recycled aluminum drying device, It is characterized in that It comprises a drying mechanism, which comprises a workbench, a cylinder is fixedly connected at a position near one side of the top of the workbench, two U-shaped frames are fixedly connected to the outer wall of the cylinder at equal angles around its axis, a storage box is fixedly connected to the outer wall of one of the U-shaped frames, an aluminum block pouring mechanism is fixedly connected to the inside of the storage box, a vibrating mechanism is fixedly connected to the outer wall of the cylinder near the center, a hot air drying mechanism is fixedly connected to the vibrating mechanism at the inside of the cylinder, a square frame is fixedly connected to one side of the top of the workbench, and a hot air blower is fixedly connected to the outer wall of the square frame; The aluminum block pouring mechanism includes a square frame three, the outer wall of the square frame three is rotatably connected to the inner wall of one end of the storage box, a square hole two is opened near the center position of the outer wall of the square frame three, and a square hole one is opened near the center position of the bottom end of the storage box, the outer wall of the square frame three is fixedly connected to a U-shaped frame two, and a square plate is slidably inserted inside the U-shaped frame two.

2. A recycled aluminum drying device according to claim 1, It is characterized in that A sealing cover is slidably inserted inside the U-shaped frame, a rotating seat 1 is fixedly connected to the bottom end of the square plate near the center, the rotating seat 1 is rotatably connected to a rotating rod, and the other end of the rotating rod is rotatably connected to a rotating seat 2, the outer wall of the rotating seat 2 is fixedly connected to the outer wall of one of the sealing covers, a hydraulic rod is fixedly connected to the outer wall of one end of the sealing cover near the center, and the outer wall of the hydraulic rod is fixedly connected to the outer wall of the workbench.

3. A recycled aluminum drying device according to claim 1, It is characterized in that Springs 1 are fixedly connected between the outer wall of the first end of the square frame 3 and the inner wall of the bottom end of the storage box near both sides.

4. A recycled aluminum drying device according to claim 1, It is characterized in that A square frame 2 is fixedly connected to the outer wall of the cylinder near the center position, the vibration mechanism includes a motor, the outer wall of the motor is fixedly connected to the outer wall of the square frame 2, the motor shaft of the motor is fixedly connected to a round rod, two arc-shaped protrusions are fixedly connected to the outer wall of the round rod at equal intervals, a round tube is rotatably connected to the outer wall of one end of the round rod, the outer wall of the round tube is fixedly connected to the outer wall of the cylinder, a fixed bracket is fixedly connected to the outer wall of one end of the round tube, the outer walls of both ends of the fixed bracket are fixedly connected to square frame 4, and a grid is slidably inserted between the inner walls of the two square frames 4.

5. A recycled aluminum drying device according to claim 4, It is characterized in that A second spring is fixedly connected between the fourth inner wall of the square frame and the outer wall of the grid frame.

6. A recycled aluminum drying device according to claim 1, It is characterized in that The hot air drying mechanism includes an annular tube, the outer wall of the annular tube is rotatably connected to the outer wall of the circular tube, the outer wall of the annular tube is fixedly connected to the motor shaft of the motor, the outer wall of the circular tube is located inside the annular tube and has two circular holes 1 at equal angles around its axis, and one end of the hot air blower is fixedly connected to the outer wall of the circular hole 1 for air supply.

7. A recycled aluminum drying device according to claim 6, It is characterized in that The inner wall of the annular tube is provided with a plurality of circular holes 2 at equal angles around its axis, a booster unit is fixedly connected to the inner wall of the annular tube at the circular hole 2, the booster unit comprises a conical tube, a ring frame 1 is fixedly connected to the inside of the conical tube near one end, a ring frame 3 is fixedly connected to the inside of the conical tube near the other end, a ring frame 2 is slidably inserted between the inner wall of the conical tube between the ring frame 3 and the ring frame 1, a spring 3 is fixedly connected between the outer wall of the ring frame 2 and the outer wall of the ring frame 3, and a circular hole 3 is provided on the outer wall of one end of the conical tube.

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