Crossed long-distance feeding device for mixed solid waste

Abstract

The application discloses a mixed solid waste cross type long-distance conveying device and belongs to the solid waste transportation field. The mixed solid waste cross type long-distance conveying device comprises a conveying device body, a sleeve pipe is rotationally arranged above the conveying device body, and a metal frame is mounted on the surface of the sleeve pipe. The sleeve pipe is rotationally buffered by the soft rubber buffer pad, threaded portions and adjusting nuts are arranged at both ends of the sleeve pipe, on one hand, the soft rubber can absorb the great impact force when the sharp and hard solid waste falls, so that the hard object cannot hurt the belt running at high speed below; on the other hand, the operator can rotate the adjusting nut to fasten the threaded portion, increase the pressure of the upper and lower inner pipes on the supporting rod, accurately adjust the rotation damping of the sleeve pipe, effectively avoid the problem that the sleeve pipe rotates too fast due to no damping or too small damping, and the material on the surface of the buffer pad is thrown out, and the stability and safety of the material falling buffering process are ensured.

Description

Technical Field

[0001] This invention relates to the field of solid waste transportation technology, and in particular to a cross-type long-distance conveying device for mixed solid waste. Background Technology

[0002] In the production process of cement production by processing mixed solid waste into cement using an incineration tower, it is usually necessary to rely on a long-distance belt conveyor system to transport various solid waste materials to the subsequent processing tower. At the cross-transfer node where multiple conveyor belts intersect, the upper-level conveying equipment throws the mixed solid waste from the conveying pipe, and the material falls directly onto the conveyor belt below under the action of gravity, thereby realizing the cross-transfer and continuous conveying of materials between different directions and heights.

[0003] However, due to the complex origin and variable composition of the mixed solid waste in cement kiln co-processing, even after pre-screening, the material may still contain sharp objects with pointed edges, such as hard gravel and metal residue. During the cross-feeding process of existing equipment, these sharp materials fall freely from a higher drop pipe, converging on the high-speed conveyor belt below. The immense impact force from the fall, combined with the hard edges of the sharp materials, easily punctures the conveyor belt's rubber surface. Furthermore, when sharp materials become lodged between the discharge port and the belt, the high-speed movement of the belt can easily cause severe longitudinal tears and deep scratches. This not only leads to frequent conveyor belt damage and scrapping, significantly increasing downtime maintenance costs, but also severely restricts the continuous and stable operation of cement production lines co-processing solid waste. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art mentioned above, and to propose a cross-type long-distance conveying device for mixed solid waste.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A cross-type long-distance conveying device for mixed solid waste includes a conveying equipment body, a sleeve rotatably mounted above the conveying equipment body, a metal frame mounted on the surface of the sleeve, and a buffer pad installed inside the metal frame. A support plate is provided below the sleeve, and a lever is rotatably provided at the bottom of the support plate; Sliding rods are provided on both sides below the sleeve. Support members are installed on the surface of the sliding rods. An impact ball is installed at the top of the support member. The impact ball is adapted to contact the bottom of the sleeve.

[0006] Preferably, a conveying pipe for conveying materials is provided directly above the main body of the conveying equipment, and the discharge port of the conveying pipe is located above the buffer pad.

[0007] Preferably, support rods are symmetrically installed on both sides of the top of the transport equipment body, and support rods are installed inside the two support rods. The sleeve is rotatably connected to the surface of the support rod. Inner tubes are installed on the upper and lower sides of both ends of the sleeve. The upper and lower inner tubes are fitted together on the surface of the support rod. Threaded portions are installed on the surfaces of both ends of the sleeve. Adjusting nuts are threadedly connected to the surfaces of the threaded portions. A protective sleeve is fitted onto the surface of the sleeve. The protective sleeve is located outside the threaded portions.

[0008] Preferably, the buffer pads are circumferentially distributed on the surface of the sleeve, and the surface of the buffer pads is provided with transverse grooves at equal intervals.

[0009] Preferably, support rings are installed on the surfaces of both support rods, the bearing plate is installed between the two support rings, guide members are installed on the surfaces of both sides of the bearing plate, a sliding rod is slidably connected inside the guide member, an eccentric wheel is eccentrically connected to the surface of the sleeve, and the top end of the sliding rod is adapted to contact the eccentric wheel.

[0010] Preferably, the bearing plate has a sliding groove inside, a hemispherical sleeve is slidably connected inside the sliding groove, a return spring is connected to the surface of the hemispherical sleeve, the other end of the return spring is connected to the inner wall of the sliding groove, a push rod is connected to the bottom end of the sliding rod, the bottom end of the push rod is rotatably connected inside the hemispherical sleeve, a guide groove is provided at the rear end of the sliding groove, a rack is slidably connected inside the guide groove, and one end of the rack is fixedly connected to the hemispherical sleeve.

[0011] Preferably, the bearing plate has a ball bearing inside, a circular gear is mounted on the surface of the ball bearing, the rack and the circular gear are meshed together, a vertical rod is mounted on the bottom end of the ball bearing, a fixed plate is mounted on the bottom end of the vertical rod, and the actuating rod is fixedly connected to the surface of the fixed plate at equal intervals.

[0012] Preferably, a fixing ring for limiting the vertical rod is installed at the bottom end of the support plate, the vertical rod is rotatably connected inside the fixing ring, and the actuating rod extends to the outside of the support plate.

[0013] Preferably, a fixing plate is mounted on the surface of the sliding rod, and the support member is mounted on the top of the fixing plate. The support member is configured as upper and lower parts connected by a buffer spring.

[0014] Preferably, the top of the impact ball and the surface of the sleeve are adapted to contact each other, a stabilizing device is installed on the surface of the support rod, the end of the stabilizing device away from the support rod is set as an annular shape, and the top of the sliding rod is slidably connected inside the annular part of the stabilizing device.

[0015] Compared with the prior art, the present invention provides a cross-type long-distance conveying device for mixed solid waste, which has the following beneficial effects: 1. This cross-type long-distance conveying device for mixed solid waste uses a rotating buffer structure with a soft rubber buffer pad and a sleeve. Threaded sections and adjusting nuts are installed at both ends of the sleeve. On one hand, the soft rubber absorbs the enormous impact force of falling sharp, hard solid waste, preventing damage to the high-speed conveyor belt below. On the other hand, operators can tighten the threads by rotating the adjusting nuts, increasing the pressure of the upper and lower inner tubes on the support rod, thus achieving precise adjustment of the sleeve's rotational damping. This effectively prevents the material on the buffer pad surface from being thrown off due to insufficient or no damping, ensuring the stability and safety of the material drop buffering process.

[0016] 2. This cross-type long-distance conveying device for mixed solid waste uses an eccentric wheel to press the sliding rod downward when the sleeve rotates. This, along with the linkage rack and circular gear transmission, drives the actuating rod to rotate reciprocally. The rounded corner design at the top of the sliding rod effectively avoids jamming and rigid wear during the eccentric downward pressing process. The rotating actuating rod can quickly move the falling material from the middle of the conveying equipment body to the two side edges, evenly dispersing and flattening the solid waste that is prone to accumulation and blockage. This greatly improves the space utilization rate of the material on the conveyor belt and the efficiency of long-distance conveying.

[0017] 3. This cross-type long-distance conveying device for mixed solid waste uses the reciprocating motion of the sliding rod to link the impact ball at the top of the support component to slightly impact the bottom of the sleeve. The slight vibration generated by inertia and buffer spring is transmitted to the surface of the sleeve, which can effectively prevent wet and sticky solid waste from adhering to the metal frame, buffer pad and its transverse groove, keeping the material drop surface clean and smooth. At the same time, the stabilizing device at the top of the sliding rod and the guide component at the bottom form a double upper and lower limit guide, eliminating the influence of eccentric lateral force on the sliding rod, and ensuring the absolute stability and reliability of the dust removal mechanism and transmission rods in high-speed reciprocating motion. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the cross-type long-distance material conveying device for mixed solid waste proposed in this invention; Figure 2 This is an enlarged structural diagram of the conveying pipe position of the cross-type long-distance conveying device for mixed solid waste proposed in this invention; Figure 3 This is a partial, enlarged, bottom-view structural diagram of the transport equipment body of the cross-type long-distance material conveying device for mixed solid waste proposed in this invention; Figure 4 This is a schematic diagram of the casing surface structure of the cross-type long-distance material conveying device for mixed solid waste proposed in this invention; Figure 5 This is a schematic diagram of the threaded section structure of the cross-type long-distance material conveying device for mixed solid waste proposed in this invention; Figure 6This is a schematic diagram of the bearing plate structure of the cross-type long-distance conveying device for mixed solid waste proposed in this invention; Figure 7 This is a bottom view of the support plate structure of the cross-type long-distance conveying device for mixed solid waste proposed in this invention; Figure 8 The present invention provides a cross-type long-distance conveying device for mixed solid waste. Figure 7 Enlarged structural diagram at point A in the middle; Figure 9 This is a schematic diagram showing the disassembled structure of the support plate and protective plate of the cross-type long-distance conveying device for mixed solid waste proposed in this invention; Figure 10 The present invention proposes a cross-type long-distance conveying device for mixed solid waste. Figure 9 Enlarged structural diagram at point B; Figure 11 This is a schematic diagram of the fixed plate installation structure of the cross-type long-distance conveying device for mixed solid waste proposed in this invention; Figure 12 This is a schematic diagram of the actuating rod installation structure of the cross-type long-distance conveying device for mixed solid waste proposed in this invention.

[0019] In the diagram: 1. Transport equipment body; 2. Conveying pipe; 3. Support rod; 31. Support rod; 32. Sleeve; 33. Inner tube; 34. Threaded part; 35. Adjusting nut; 36. Protective sleeve; 37. Metal frame; 38. Buffer pad; 4. Support ring; 401. Bearing plate; 4011. Guide component; 402. Sliding rod; 403. Push rod; 404. Hemispherical sleeve; 405. Return spring; 406. Slide groove; 407. Guide groove; 408. Rack; 409. Ball bearing; 410. Circular gear; 411. Vertical rod; 412. Fixed plate; 413. Actuating rod; 414. Protective plate; 415. Eccentric wheel; 5. Fixed plate; 51. Support component; 52. Buffer spring; 53. Impact ball; 54. Stabilizing device. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Reference Figures 1-12 A cross-type long-distance conveying device for mixed solid waste includes a conveying equipment body 1. A sleeve 32 is rotatably mounted on the top of the conveying equipment body 1. A metal frame 37 is installed on the surface of the sleeve 32. A buffer pad 38 is installed inside the metal frame 37. The buffer pad 38 is made of soft rubber material to effectively absorb the impact energy of sharp and hard materials falling by utilizing the high elastic deformation capacity of soft rubber. A conveying pipe 2 for conveying materials is set directly above the conveying equipment body 1. The discharge port of the conveying pipe 2 is located above the buffer pad 38. A bearing plate 401 is set below the sleeve 32. A lever 413 is rotatably mounted on the bottom of the bearing plate 401. Sliding rods 402 are set on both sides below the sleeve 32. A support member 51 is installed on the surface of the sliding rod 402. An impact ball 53 is installed on the top of the support member 51. The impact ball 53 is adapted to contact the bottom of the sleeve 32.

[0023] Reference Figures 2-5 Support rods 3 are symmetrically installed on both sides of the top of the main body 1 of the transport equipment. Support rods 31 are installed inside the two support rods 3. Sleeves 32 are rotatably connected to the surface of the support rods 31. Inner tubes 33 are installed on the upper and lower sides of both ends of the sleeve 32. The upper and lower inner tubes 33 are fitted together on the surface of the support rods 31. Threaded parts 34 are installed on the surface of both ends of the sleeve 32. Adjusting nuts 35 are threadedly connected to the surface of the threaded parts 34. Protective sleeves 36 are fitted onto the surface of the sleeve 32. Protective sleeves 36 are set outside the threaded parts 34. Buffer pads 38 are circumferentially distributed on the surface of the sleeve 32. Horizontal grooves are evenly spaced on the surface of the buffer pads 38.

[0024] Specifically, in order to achieve dynamic adjustment of the rotational damping of the sleeve 32, the threaded part 34 is designed as a conical contraction structure. By manually rotating the adjusting nut 35 to screw it into the threaded part 34, the axial thrust of the threaded engagement can be converted into radial contraction and extrusion force on the threaded part 34. This forces the two inner tubes 33 to retract inward, increasing the clamping pressure of the inner wall of the inner tube 33 on the outer wall of the support rod 31. This achieves stepless adjustment of the damping and prevents the sleeve 32 from rotating too fast, which would cause the falling solid waste to be thrown away by a large centrifugal force.

[0025] Reference Figures 6-12Support rings 4 are installed on the surfaces of both support rods 3. The bearing plate 401 is installed between the two support rings 4. Guide members 4011 are installed on the surfaces of both sides of the bearing plate 401. A sliding rod 402 is slidably connected inside the guide member 4011. An eccentric wheel 415 is eccentrically connected to the surface of the sleeve 32. The top end of the sliding rod 402 is adapted to contact the eccentric wheel 415. In order to reduce the sliding friction resistance during eccentric compression, the top end of the sliding rod 402 is ground into a rounded corner structure. This rounded corner structure always maintains a smooth tangential contact with the outer working contour of the eccentric wheel 415, thus structurally eliminating the movement jamming and local stress concentration wear phenomenon caused by rigid right-angle contact.

[0026] The bearing plate 401 has a sliding groove 406 inside, and a hemispherical sleeve 404 is slidably connected inside the sliding groove 406. A return spring 405 is connected to the surface of the hemispherical sleeve 404, and the other end of the return spring 405 is connected to the inner wall of the sliding groove 406. A push rod 403 is connected to the bottom end of the sliding rod 402. The sliding rod 402 and the push rod 403 are connected by a ball head pin. The bottom end of the push rod 403 is slidably connected inside the hemispherical sleeve 404. A guide groove 407 is provided at the rear end of the sliding groove 406. A rack 408 is slidably connected inside the guide groove 407. One end of the rack 408 is fixedly connected to the hemispherical sleeve 404.

[0027] The bearing plate 401 is equipped with a ball bearing 409 inside, which rotates inside the slide groove 406. A circular gear 410 is installed on the surface of the ball bearing 409. The two form a gear and rack meshing transmission pair that converts linear reciprocating motion into rotational motion. The rack 408 and the circular gear 410 are meshed and connected. A vertical rod 411 is installed at the bottom end of the ball bearing 409. A fixed plate 412 is installed at the bottom end of the vertical rod 411. A lever 413 is fixedly connected to the surface of the fixed plate 412 at equal intervals. A fixed ring is installed at the bottom end of the bearing plate 401 to restrict the vertical rod 411. The vertical rod 411 is rotatably connected inside the fixed ring to restrict the vertical rod 411 to rotate only inside the fixed ring and not to move horizontally. The lever 413 extends to the outside of the bearing plate 401. Its rotation range covers the path of solid waste from the buffer pad 38 to the transport equipment body 1, forming a sweeping area with a guiding and dispersing function.

[0028] Reference Figures 7-8A fixed plate 5 is mounted on the surface of the sliding rod 402, and a support member 51 is mounted on the top of the fixed plate 5. The support member 51 is configured as upper and lower parts connected by a buffer spring 52. The top of the impact ball 53 is adapted to contact the surface of the sleeve 32. A stabilizing device 54 is mounted on the surface of the support rod 3. The end of the stabilizing device 54 away from the support rod 3 is configured as an annular shape. The top of the sliding rod 402 is slidably connected inside the annular part of the stabilizing device 54. The inner diameter of the annular part of the stabilizing device 54 is precisely clearance matched with the outer diameter of the sliding rod 402. The central axis of the stabilizing device 54 is strictly coplanar and coaxial with the central axis of the bottom guide member 4011. The two form a double-support point guide and limiting system distributed vertically in space, which can effectively counteract the lateral component force generated when the eccentric wheel 415 rotates and presses down, and jointly ensure that the sliding rod 402 only undergoes vertical displacement under pressure and impact reaction force, ensuring its stability during movement.

[0029] In this invention, when the mixed solid waste is thrown from the discharge port of the conveying pipe 2 directly above the main body 1 of the conveying equipment, the material first falls onto the buffer pad 38 on the surface of the sleeve 32. The buffer pad 38 is made of soft rubber material, which can effectively absorb the huge impact force brought by the falling sharp and hard solid waste, preventing the hard object from directly hitting the high-speed belt below and causing damage. Under the gravity and impact of the falling material, the metal frame 37 and the buffer pad 38 carrying the solid waste force the sleeve 32 and inner pipe 33 to rotate around the support rod 31. Before rotation, the operator can rotate the adjusting nut 35 to tighten the threaded part 34, thereby increasing the pressure of the upper and lower inner tubes 33 on the support rod 31, thus adjusting the damping of the sleeve 32 when it rotates, and preventing the solid waste material sliding on the surface of the buffer pad 38 from being thrown out quickly due to the excessive rotation speed of the sleeve 32; the rotation of the sleeve 32 causes the buffer pad 38 to lose its original horizontal support angle, and the material on it slides smoothly onto the conveyor body 1 below, thus completing the initial buffering and unloading process.

[0030] During the rotation of the sleeve 32 under the impact of the material, the eccentric wheel 415, which is eccentrically connected to the surface of the sleeve 32, rotates synchronously. Its rotational profile presses downward against the top of the sliding rod 402, which is in contact with it. The top of the sliding rod 402 is rounded to avoid jamming and wear. At this time, the sliding rod 402 moves downward within the guide member 4011. The downward movement of the sliding rod 402 pushes the push rod 403 at its bottom end, which in turn pushes the hemispherical sleeve 404 to slide inside the groove 406 and compress the return spring 405. The sliding of the hemispherical sleeve 404 causes the fixedly connected rack 408 to move linearly within the guide groove 407. Since the rack 408 meshes with the circular gear 410, it drives the circular gear 410 and the ball 409. At this time, the ball 409 drives the fixed disk 412 to rotate as a whole through the vertical rod 411. This transmission process eventually causes the actuating rod 413 on the fixed disk 412 to rotate. The rotating actuating rod 413 actuates the falling solid waste, thereby moving the solid waste from the middle of the transport equipment body 1 to the edge, thus breaking up the accumulated solid waste and distributing it evenly on the transport equipment body 1. As the eccentric wheel 415 continues to rotate, the return spring 405 continuously releases its elastic force to reset the mechanism, thereby realizing the reciprocating rotation of the actuating rod 413 to move the material.

[0031] During the reciprocating motion of the sliding rod 402 driven by the eccentric wheel 415, the sliding rod 402 simultaneously drives the fixed plate 5 and the support member 51 to move up and down. Since the support member 51 is set into upper and lower parts and connected by a buffer spring 52, under the inertia of the reset motion and the elastic force of the buffer spring 52, the impact ball 53 installed at the top of the support member 51 will slightly impact the bottom of the sleeve 32. The small vibration generated by this impact is transmitted to the surface of the sleeve 32. By using the impact ball 53 to slightly impact the sleeve 32, solid waste can be effectively prevented from adhering to the surface of the metal frame 37 and the buffer pad 38, ensuring that the buffer pad 38 and its surface grooves remain clean, thereby ensuring the smooth sliding of solid waste and the long-term stability of the entire cross-feeding device. The stabilizing device 54 set at the top of the sliding rod 402, together with the guide member 4011 at the bottom, ensures the stability of the sliding rod 402 when it moves.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cross-type long-distance conveying device for mixed solid waste, comprising a conveying equipment body (1), characterized in that, A sleeve (32) is rotatably provided above the main body (1) of the transport equipment. A metal frame (37) is installed on the surface of the sleeve (32), and a buffer pad (38) is installed inside the metal frame (37). A support plate (401) is provided below the sleeve (32), and a lever (413) is rotatably provided at the bottom of the support plate (401). Sliding rods (402) are provided on both sides below the sleeve (32). A support member (51) is installed on the surface of the sliding rod (402). An impact ball (53) is installed at the top of the support member (51). The impact ball (53) and the bottom of the sleeve (32) are adapted to contact each other.

2. The cross-type long-distance conveying device for mixed solid waste according to claim 1, characterized in that, The conveying pipe (2) for conveying materials is provided directly above the main body (1) of the transport equipment, and the discharge port of the conveying pipe (2) is located above the buffer pad (38).

3. The cross-type long-distance conveying device for mixed solid waste according to claim 1, characterized in that, Support rods (3) are symmetrically installed on both sides of the top of the main body (1) of the transport equipment. Support rods (31) are installed inside the two support rods (3). The sleeve (32) is rotatably connected to the surface of the support rod (31). Inner tubes (33) are installed on the upper and lower sides of both ends of the sleeve (32). The upper and lower inner tubes (33) are fitted together on the surface of the support rod (31). Threaded parts (34) are installed on the surface of both ends of the sleeve (32). Adjusting nuts (35) are threadedly connected to the surface of the threaded parts (34). Protective sleeves (36) are fitted onto the surface of the sleeve (32). The protective sleeves (36) are set outside the threaded parts (34).

4. The cross-type long-distance conveying device for mixed solid waste according to claim 1, characterized in that, The buffer pad (38) is circumferentially distributed on the surface of the sleeve (32), and the surface of the buffer pad (38) is provided with horizontal grooves at equal intervals.

5. The cross-type long-distance conveying device for mixed solid waste according to claim 3, characterized in that, Support rings (4) are installed on the surfaces of both support rods (3). The bearing plate (401) is installed between the two support rings (4). Guide members (4011) are installed on the surfaces of both sides of the bearing plate (401). A sliding rod (402) is slidably connected inside the guide member (4011). An eccentric wheel (415) is eccentrically connected to the surface of the sleeve (32). The top end of the sliding rod (402) is adapted to contact the eccentric wheel (415).

6. The cross-type long-distance conveying device for mixed solid waste according to claim 5, characterized in that, The bearing plate (401) has a sliding groove (406) inside, and a hemispherical sleeve (404) is slidably connected inside the sliding groove (406). A return spring (405) is connected to the surface of the hemispherical sleeve (404), and the other end of the return spring (405) is connected to the inner wall of the sliding groove (406). A push rod (403) is connected to the bottom end of the sliding rod (402), and the bottom end of the push rod (403) is slidably connected inside the hemispherical sleeve (404). A guide groove (407) is provided at the rear end of the sliding groove (406), and a rack (408) is slidably connected inside the guide groove (407). One end of the rack (408) is fixedly connected to the hemispherical sleeve (404).

7. The cross-type long-distance conveying device for mixed solid waste according to claim 6, characterized in that, The bearing plate (401) is provided with a ball bearing (409) inside. A circular gear (410) is installed on the surface of the ball bearing (409). The rack (408) and the circular gear (410) are meshed and connected. A vertical rod (411) is installed at the bottom end of the ball bearing (409). A fixed plate (412) is installed at the bottom end of the vertical rod (411). The actuating rod (413) is fixedly connected to the surface of the fixed plate (412) at equal intervals.

8. The cross-type long-distance conveying device for mixed solid waste according to claim 7, characterized in that, The bottom end of the support plate (401) is equipped with a fixing ring for limiting the vertical rod (411), the vertical rod (411) is rotatably connected inside the fixing ring, the actuating rod (413) extends to the outside of the support plate (401), and the top end of the support plate (401) is equipped with a protective plate (414), the top of the protective plate (414) is provided with a transverse groove for the push rod (403) to pass through.

9. The cross-type long-distance conveying device for mixed solid waste according to claim 1, characterized in that, A fixing plate (5) is mounted on the surface of the sliding rod (402), and the support member (51) is mounted on the top of the fixing plate (5). The support member (51) is configured as upper and lower parts and connected by a buffer spring (52).

10. The cross-type long-distance conveying device for mixed solid waste according to claim 3, characterized in that, The top of the impact ball (53) and the surface of the sleeve (32) are adapted to contact each other. A stabilizing device (54) is installed on the surface of the support rod (3). The end of the stabilizing device (54) away from the support rod (3) is set as an annular shape. The top of the sliding rod (402) is slidably connected inside the annular part of the stabilizing device (54).

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