A disassembly type centrifugal casting machine

Abstract

The utility model discloses a detachable centrifugal casting machine, which relates to the technical field of roller manufacturing, including a workbench, a shock-absorbing power generation mechanism is arranged at the bottom end of the workbench, a soft light belt is arranged on the outside of the workbench, a centrifugal cylinder is arranged in the middle of the upper part of the workbench, sealing covers are arranged at both ends of the centrifugal cylinder, and a casting mechanism is inserted on the side of the sealing cover away from the centrifugal cylinder; a rotating mechanism is symmetrically arranged at the top of the workbench and at the bottom of the centrifugal cylinder. The utility model ensures the sealing of the casting process through a sealing ring, and effectively isolates the leakage of the casting material; in addition, the centrifugal casting machine also incorporates a shock-absorbing power generation mechanism, which not only enhances the casting stability, but also converts the vibration energy into electrical energy for the matching soft light belt, which not only realizes the recycling and reuse of energy, but also enhances the safety warning effect of the working area through the warning function of the light belt.

Description

Technical Field

[0001] The utility model relates to the technical field of roller manufacturing, in particular to a detachable centrifugal casting machine. Background Art

[0002] Rollers, as core components that cause metals to undergo continuous plastic deformation in rolling mills, play a vital role. Traditionally, semi-steel rolls are mostly manufactured through static casting processes, which not only requires the preparation of a large number of molds, but also comes with high cost investment; in contrast, the introduction of centrifugal casting technology has significantly reduced the dependence on molds, thereby greatly reducing the additional expenses incurred by customized molds, so the application of centrifugal casting machines is becoming increasingly popular; in order to further enhance production flexibility and efficiency, and to be able to quickly adjust to meet different production needs, the detachable centrifugal casting machine was born.

[0003] For example, Chinese patent CN217070692U discloses a horizontal casting centrifuge for rollers, including a base, a threaded rod, an annular tube, a fixed plate, a second bearing, a rotating rod, a casting trough, a second gear, a first gear and a rotating shaft. The threaded rod drives a number of nozzles to perform reciprocating motion to cool the casting trough in all directions, and then the first spring and the second spring are used to dampen and buffer the rotating casting trough to ensure the production quality of the rollers. However, during the centrifugal casting process, although the centrifuge achieves efficient casting and shock absorption, it ignores that the vibration energy generated during the operation can be converted into an intuitive safety warning method to effectively remind the surrounding personnel to maintain a safe distance and avoid unexpected risks that may be encountered due to being close to the operating area; this omission reveals that while ensuring production efficiency and equipment stability, the centrifuge has not fully considered improving on-site safety warnings.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0005] In view of the problems in the related technology, the utility model proposes a detachable centrifugal casting machine to overcome the above technical problems existing in the existing related technology.

[0006] To this end, the specific technical solutions adopted by the utility model are as follows:

[0007] A detachable centrifugal casting machine comprises a workbench, a shock-absorbing power generation mechanism is arranged at the bottom end of the workbench, a soft light strip is arranged on the outside of the workbench, a centrifugal cylinder is arranged in the middle of the upper part of the workbench, sealing covers are arranged at both ends of the centrifugal cylinder, and a casting mechanism is inserted on the side of the sealing cover away from the centrifugal cylinder; rotating mechanisms are symmetrically arranged at the top end of the workbench and located at the bottom of the centrifugal cylinder, and one end of one set of rotating mechanisms is connected to the output shaft of the motor.

[0008] Furthermore, in order to efficiently produce the rolling roller, the centrifugal casting technology is adopted for manufacturing. Under the rotation of the motor output shaft, the auxiliary column can be driven to rotate, thereby driving the centrifugal cylinder to rotate, and then realizing the centrifugal casting of the rolling roller. A plurality of annular grooves are opened on the outer side of the centrifugal cylinder, and the centrifugal cylinder and the sealing cover are connected by a plurality of bolts that are evenly arranged and distributed in a circle; the rotating mechanism includes a support seat symmetrically arranged on one side of the top of the workbench, a fixed column is arranged on the top of the support seat, and a rotating column is interspersed between the two groups of fixed columns; an auxiliary column is arranged inside the annular groove, and a plurality of auxiliary columns are penetrated by the rotating column.

[0009] Furthermore, in order to prevent the leakage of the hot metal liquid during the centrifugal pouring process, the sealing effect of the sealing ring can ensure the sealing of the connection during the pouring process, thereby avoiding external pollution and reducing the waste of raw materials, thereby ensuring the pouring quality. The pouring mechanism includes a discharge pipe inserted into the sealing cover on the side away from the centrifugal cylinder, the top of the discharge pipe passes through the bottom end of the containing box, and the bottom end of the containing box is connected to the top of the workbench through a number of supporting legs; the connection between the discharge pipe and the centrifugal cylinder and the containing box is provided with a sealing ring; a skeleton is provided inside the sealing ring, and the cross-section of the skeleton is provided in the shape of an L. shaped structure, a plurality of evenly arranged protrusions are arranged on the circumferential outer side of the sealing ring, and the cross section of the protrusion is arranged as a semicircular structure, a reinforcing piece is embedded at the bottom of the circumferential outer side of the sealing ring, a dustproof lip is arranged at the bottom end of the circumferential inner wall of the sealing ring, and one end of the dustproof lip is arranged obliquely downward, a plurality of sealing lips are arranged at the top of the circumferential inner wall of the sealing ring, and one end of the sealing lip is arranged obliquely upward; a groove is provided at the top of the sealing ring, and a plurality of annular grooves 2 are provided on both side walls inside the groove, and the cross section of the annular grooves 2 is arranged as a semicircular structure, and a spring 2 is embedded inside the plurality of annular grooves 2 close to the sealing lip side.

[0010] Furthermore, in order to ensure the stability of the pouring process and enhance on-site safety warnings, the centrifugal pouring machine can be shock-absorbing and buffered under the elastic action of spring 1, and at the same time, a number of permanent magnet blocks can be synchronously moved up and down inside the armature, so that the armature generates an induced current, thereby providing current to the soft light strip, thereby playing a role in safety warning. The shock-absorbing power generation mechanism includes a fixed rod arranged at the four corners of the bottom end of the workbench, a spring 1 is arranged on the outside of the fixed rod, and a number of permanent magnet blocks with axially distributed magnetic poles are arranged in sequence from top to bottom at the bottom of the fixed rod, that is, the upper half of the permanent magnet block represents the North Pole, and the lower half of the permanent magnet block represents the South Pole, an armature is arranged on the outside of the permanent magnet block, and a hollow structure support sleeve is arranged on the outside of the armature; a hydraulic cylinder is arranged at the bottom of the permanent magnet block.

[0011] The beneficial effects of the utility model are:

[0012] The utility model realizes the disassembly, assembly and reorganization of the centrifugal casting machine through the coordinated arrangement of the centrifugal cylinder and the sealing cover, thereby greatly improving the flexibility of the equipment; in specific operations, the centrifugal casting production of the roller is completed together through the coordinated arrangement of the centrifugal cylinder, the casting mechanism and the rotating mechanism; in order to ensure the sealing of the casting process, a sealing ring is specially installed to effectively isolate the leakage of the casting material; in addition, the centrifugal casting machine also incorporates a shock-absorbing power generation mechanism, which not only enhances the casting stability, but also converts the vibration energy into electrical energy for use with the matching soft light strip, thereby realizing the recovery and reuse of energy and enhancing the safety warning effect of the working area through the warning function of the light strip.

[0013] By setting a sealing ring, the sealing effect of the sealing ring can ensure the sealing of the connection during the pouring process, ensure the safety of the production environment, avoid external pollution and reduce the waste of raw materials, thereby ensuring the pouring quality.

[0014] By setting up a shock-absorbing power generation mechanism, the centrifugal casting machine can be shock-absorbing and buffered under the elastic action of spring 1. At the same time, several permanent magnets can be moved up and down synchronously inside the armature, so that the armature generates an induced current, thereby providing current to the soft light strip, thereby playing a role in safety warning, adding an intelligent and efficient solution to the safety management of the production site. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is one of the structural schematic diagrams of a detachable centrifugal casting machine according to an embodiment of the utility model;

[0017] Figure 2 This is a second structural schematic diagram of a detachable centrifugal casting machine according to an embodiment of the utility model;

[0018] Figure 3 It is a partial three-dimensional assembly diagram of a disassembly-type centrifugal casting machine according to an embodiment of the utility model;

[0019] Figure 4 yes Figure 3 The enlarged view of point A in the middle;

[0020] Figure 5 It is a cross-sectional view of a sealing ring in a detachable centrifugal casting machine according to an embodiment of the utility model;

[0021] Figure 6 yes Figure 5 Enlarged view of point B in the middle.

[0022] In the figure:

[0023] 1. Workbench; 2. Shock-absorbing power generation mechanism; 201. Fixed rod; 202. Spring 1; 203. Permanent magnet block; 204. Armature; 205. Support sleeve; 206. Hydraulic cylinder; 3. Flexible light strip; 4. Centrifugal cylinder; 401. Annular groove 1; 5. Sealing cover; 6. Casting mechanism; 601. Discharge pipe; 602. Receiving box; 603. Support leg; 604. Sealing ring; 60401. Skeleton; 60402. Bump; 60403. Reinforcement; 60404. Dust lip; 60405. Sealing lip; 60406. Groove; 60407. Annular groove 2; 60408. Spring 2; 7. Rotating mechanism; 701. Support seat; 702. Fixed column; 703. Rotating column; 704. Auxiliary column; 8. Motor. DETAILED DESCRIPTION

[0024] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0025] According to an embodiment of the utility model, a detachable centrifugal casting machine is provided.

[0026] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-6 As shown, according to the detachable centrifugal casting machine of the embodiment of the utility model, it includes a workbench 1, a shock-absorbing power generation mechanism 2 is arranged at the bottom end of the workbench 1, a soft light strip 3 is arranged on the outside of the workbench 1, a centrifugal cylinder 4 is arranged in the upper middle part of the workbench 1, sealing covers 5 are arranged at both ends of the centrifugal cylinder 4, and a casting mechanism 6 is inserted on the side of the sealing cover 5 away from the centrifugal cylinder 4; a rotating mechanism 7 is symmetrically arranged at the top of the workbench 1 and at the bottom of the centrifugal cylinder 4, and one end of one set of the rotating mechanisms 7 is connected to the output shaft of the motor 8.

[0027] In addition, it should be noted that the above-mentioned soft light strip 3 is composed of a flexible circuit board, a light-emitting diode, a wire and a connector. The soft light strip 3 is a prior art and will not be elaborated in detail here.

[0028] With the aid of the above-mentioned technical scheme of the utility model, the utility model realizes the disassembly, assembly and reorganization of the centrifugal casting machine through the coordinated arrangement of the centrifugal cylinder 4 and the sealing cover 5, thereby greatly improving the flexibility of the equipment; in specific operation, the centrifugal casting production of the roller is completed together through the coordinated arrangement of the centrifugal cylinder 4, the casting mechanism 6 and the rotating mechanism 7; in order to ensure the sealing of the casting process, a sealing ring 604 is specially installed to effectively isolate the leakage of the casting material; in addition, the centrifugal casting machine is also integrated with a shock-absorbing power generation mechanism 2, which not only enhances the casting stability, but also converts the vibration energy into electrical energy for the matching soft light strip 3, thereby realizing the recovery and reuse of energy and enhancing the safety warning effect of the working area through the warning function of the light strip.

[0029] In one embodiment, for the above-mentioned centrifugal cylinder 4 and rotating mechanism 7, a plurality of annular grooves 401 are opened on the outer side of the centrifugal cylinder 4, and the centrifugal cylinder 4 is connected to the sealing cover 5 by a plurality of bolts that are evenly arranged and distributed in a circumference; the rotating mechanism 7 includes a support seat 701 symmetrically arranged on one side of the top end of the workbench 1, a fixed column 702 is arranged on the top end of the support seat 701, and a rotating column 703 is interspersed between the two groups of fixed columns 702; an auxiliary column 704 is arranged inside the annular groove 401, and a plurality of auxiliary columns 704 are penetrated by the rotating column 703; under the rotation action of the output shaft of the motor 8, the auxiliary column 704 can be driven to rotate, thereby driving the centrifugal cylinder 4 to rotate, and then realizing the centrifugal casting of the roller.

[0030] Working principle of the centrifugal cylinder 4 and the rotating mechanism 7: through the rotation of the output shaft of the motor 8 and the fixing action of the fixed column 702, the rotating column 703 connected to the output shaft of the motor 8 rotates, and at the same time, the auxiliary column 704 rotates inside the annular groove 401, so that the centrifugal cylinder 4 rotates in the opposite direction under the rotation action of the auxiliary column 704, and at the same time, another set of rotating mechanisms 7 also rotates under the rotation action of the centrifugal cylinder 4, so that the roller can be centrifugally cast and produced.

[0031] In one embodiment, for the above-mentioned pouring mechanism 6, the pouring mechanism 6 includes a discharge pipe 601 inserted and arranged on the side of the sealing cover 5 away from the centrifugal cylinder 4, the top of the discharge pipe 601 passes through the bottom end of the containing box 602, and the bottom end of the containing box 602 is connected to the top of the workbench 1 through a plurality of supporting legs 603; a sealing ring 604 is provided at the connection between the discharge pipe 601 and the centrifugal cylinder 4 and the containing box 602; a skeleton 60401 is provided inside the sealing ring 604, and the cross section of the skeleton 60401 is set as an L-shaped structure, a plurality of evenly arranged protrusions 60402 are provided on the outer side of the circumference of the sealing ring 604, and the cross section of the protrusion 60402 is set as a semicircular structure, and a reinforcing member 60403 is embedded at the bottom of the outer side of the circumference of the sealing ring 604, and the sealing ring 6 A dustproof lip 60404 is arranged at the bottom end of the circumferential inner wall of the sealing ring 604, and one end of the dustproof lip 60404 is arranged tilted downward, and a plurality of sealing lips 60405 are arranged at the top of the circumferential inner wall of the sealing ring 604, and one end of the sealing lip 60405 is arranged tilted upward; a groove 60406 is provided at the top of the sealing ring 604, and a plurality of annular grooves 60407 are provided on both side walls inside the groove 60406, and the cross-section of the annular grooves 60407 is arranged in a semicircular structure, and a spring 60408 is embedded in the plurality of annular grooves 60407 close to the side of the sealing lip 60405; under the sealing action of the sealing ring 604, the sealing of the connection during the casting process can be ensured, thereby avoiding external pollution and reducing the waste of raw materials, thereby ensuring the casting quality.

[0032] In addition, in a specific application, the sealing ring 604 is placed in the slots provided in the centrifugal cylinder 4 and the containing box 602 , and the slots and the sealing ring 604 are matched with each other.

[0033] In addition, in specific applications, the dustproof lip 60404 and the sealing lip 60405 are both tightly attached to the outer side of the discharge pipe 601, and the dustproof lip 60404 can be in contact with the air.

[0034] In one embodiment, for the above-mentioned shock-absorbing power generation mechanism 2, the shock-absorbing power generation mechanism 2 includes a fixed rod 201 arranged at the four corners of the bottom end of the workbench 1, a spring 202 is arranged on the outside of the fixed rod 201, and a plurality of permanent magnet blocks 203 with axially distributed magnetic poles are arranged in sequence from top to bottom at the bottom of the fixed rod 201, that is, the upper half of the permanent magnet block 203 represents the north pole, and the lower half of the permanent magnet block 203 represents the south pole, and an armature 204 is arranged on the outside of the permanent magnet block 203, and a hollow structure support sleeve 205 is arranged on the outside of the armature 204; a hydraulic cylinder 206 is arranged at the bottom end of the permanent magnet block 203; under the elastic action of the spring 202, the centrifugal casting machine can be shock-absorbing and buffered, and at the same time, a plurality of permanent magnet blocks 203 can be synchronously moved up and down inside the armature 204, so that the armature 204 generates an induced current, thereby providing current to the soft light strip 3, thereby playing a role of safety warning.

[0035] In addition, it should be noted that the armature 204 is composed of an armature core, an armature winding, a commutator and an end ring. The armature 204 is a prior art and will not be elaborated in detail here.

[0036] In addition, it should be noted that the above-mentioned hydraulic cylinder 206 is composed of a cylinder barrel, a piston rod, a piston, a sealing device, a buffer device, an exhaust device, a front cover and a rear cover. The working principle of the hydraulic cylinder 206 is that the hydraulic pump converts the pressure energy of the oil into mechanical energy. The composition and working principle of the hydraulic cylinder 206 are existing technologies and will not be elaborated in detail here.

[0037] In addition, in a specific application, the armature 204 and the flexible light strip 3 are connected via wires. This is a prior art, which is not shown in the figure and will not be elaborated on here.

[0038] Working principle of the shock-absorbing power generation mechanism 2: During the centrifugal pouring process, the vibration generated during the pouring process can be better converted into compression and extension of the spring 202 through the elastic action of the spring 202, the blocking of the spring by the support sleeve 205 and the telescopic action of the hydraulic cylinder 206, that is, the elastic potential energy of the spring 202 accumulates and is released with the change of the vibration frequency and amplitude, and also drives the permanent magnet block 203 fixed on the fixed rod 201 to do up and down reciprocating motion. The up and down movement of the permanent magnet block 203 generates a changing magnetic field inside the armature 204. According to the principle of electromagnetic induction, an induced current is generated inside the armature 204. This process effectively converts mechanical energy into electrical energy, and the generated electrical energy is directly supplied to the soft light strip 3, which lights up the soft light strip 3 as a safety warning signal to remind on-site personnel to pay attention to safety and avoid approaching the working equipment, thereby ensuring production safety.

[0039] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0040] In actual application, the operator pours the metal liquid required for casting into the casting mechanism 6, then starts the motor 8, and centrifugally casts the roller through the centrifugal cylinder 4 and the rotating mechanism 7. At the same time, the casting stability is enhanced by the shock-absorbing power generation mechanism 2, and a safety warning function is given by the soft light strip 3.

[0041] In summary, with the aid of the above technical solution of the utility model, the centrifugal casting machine can be disassembled, assembled and reassembled through the coordinated arrangement of the centrifugal cylinder 4 and the sealing cover 5, thereby greatly improving the flexibility of the equipment; in specific operations, the centrifugal casting production of the roller is completed through the coordinated arrangement of the centrifugal cylinder 4, the casting mechanism 6 and the rotating mechanism 7; in order to ensure the sealing of the casting process, a sealing ring 604 is specially installed to effectively isolate the leakage of the casting material; in addition, the centrifugal casting machine is also integrated with a shock-absorbing power generation mechanism 2, which not only enhances the casting stability, but also converts the vibration energy into electrical energy for the matching soft light strip 3, thereby realizing the energy recovery and reuse, and through the light strip The warning effect is enhanced, and the safety warning effect of the working area is enhanced; by setting the sealing ring 604, the sealing of the connection during the casting process can be guaranteed under the sealing effect of the sealing ring 604, and the safety of the production environment is guaranteed, thereby avoiding external pollution and reducing the waste of raw materials, thereby ensuring the casting quality; by setting the shock-absorbing power generation mechanism 2, the centrifugal casting machine can be shock-absorbing and buffered under the elastic effect of the spring 202, and at the same time, a plurality of permanent magnet blocks 203 can be synchronously moved up and down inside the armature 204, so that the armature generates an induced current, thereby providing current to the soft light strip 3, thereby playing a role of safety warning, and adding an intelligent and efficient solution to the safety management of the production site.

[0042] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A detachable centrifugal casting machine, comprising a workbench (1), characterized in that: A shock-absorbing power generation mechanism (2) is arranged at the bottom end of the workbench (1), a soft light strip (3) is arranged on the outside of the workbench (1), a centrifugal cylinder (4) is arranged in the middle of the upper part of the workbench (1), sealing covers (5) are arranged at both ends of the centrifugal cylinder (4), and a casting mechanism (6) is interspersed on a side of the sealing cover (5) away from the centrifugal cylinder (4); A rotating mechanism (7) is symmetrically arranged at the top of the workbench (1) and at the bottom of the centrifugal cylinder (4), wherein one end of a group of the rotating mechanisms (7) is connected to the output shaft of the motor (8).

2. A detachable centrifugal casting machine according to claim 1, characterized in that: A plurality of annular grooves (401) are formed on the outer side of the centrifugal cylinder (4), and the centrifugal cylinder (4) and the sealing cover (5) are connected via a plurality of bolts that are evenly arranged and distributed in a circumferential manner.

3. A detachable centrifugal casting machine according to claim 2, characterized in that: The rotating mechanism (7) comprises a support seat (701) symmetrically arranged on one side of the top end of the workbench (1), a fixed column (702) is arranged on the top end of the support seat (701), and a rotating column (703) is interspersed between two groups of the fixed columns (702); An auxiliary column (704) is arranged inside the annular groove (401), and a plurality of the auxiliary columns (704) are penetrated by the rotating column (703).

4. A detachable centrifugal casting machine according to claim 1, characterized in that: The pouring mechanism (6) comprises a discharge pipe (601) inserted and arranged on a side of the sealing cover (5) away from the centrifugal cylinder (4), the top end of the discharge pipe (601) passes through the bottom end of the containing box (602), and the bottom end of the containing box (602) is connected to the top end of the workbench (1) via a plurality of supporting legs (603); Sealing rings (604) are provided at the connection points between the discharge pipe (601), the centrifugal cylinder (4) and the containing box (602).

5. The detachable centrifugal casting machine according to claim 1, characterized in that: The vibration-absorbing power generation mechanism (2) comprises a fixing rod (201) arranged at four corners of the bottom end of the workbench (1); a spring 1 (202) is arranged on the outside of the fixing rod (201); a plurality of permanent magnet blocks (203) with axially distributed magnetic poles are arranged in sequence from top to bottom at the bottom of the fixing rod (201), that is, the upper half of the permanent magnet block (203) represents the north pole, and the lower half of the permanent magnet block (203) represents the south pole; an armature (204) is arranged on the outside of the permanent magnet block (203); and a support sleeve (205) with a hollow structure is arranged on the outside of the armature (204); A hydraulic cylinder (206) is provided at the bottom end of the permanent magnet block (203).

6. A detachable centrifugal casting machine according to claim 4, characterized in that: The sealing ring (604) is provided with a skeleton (60401) inside, a plurality of evenly arranged protrusions (60402) are provided on the outer side of the circumference of the sealing ring (604), a reinforcing member (60403) is embedded on the bottom of the outer side of the circumference of the sealing ring (604), a dustproof lip (60404) is provided at the bottom end of the inner wall of the circumference of the sealing ring (604), and one end of the dustproof lip (60404) is arranged tilted downward, and a plurality of sealing lips (60405) are provided on the top of the inner wall of the circumference of the sealing ring (604); A groove (60406) is provided at the top of the sealing ring (604), and a plurality of annular grooves (60407) are provided on both side walls inside the groove (60406), and a spring (60408) is embedded inside the plurality of annular grooves (60407) on the side close to the sealing lip (60405).

7. A detachable centrifugal casting machine according to claim 6, characterized in that: The cross section of the skeleton (60401) is set to an L-shaped structure, the cross section of the protrusion (60402) is set to a semicircular structure, one end of the sealing lip (60405) is set to be inclined upward, and the cross section of the annular groove 2 (60407) is set to a semicircular structure.

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