Front end cover sealing structure for crust breaking air cylinder

Abstract

The utility model discloses a front end cover sealing structure for a crust breaking air cylinder, which belongs to the technical field of crust breaking air cylinders and comprises a crust breaking air cylinder front end cover and a piston rod penetrating through the crust breaking air cylinder front end cover, the free end of the piston rod is fixedly connected with a connecting plug, and a shaft sleeve piece is sleeved on the periphery of the piston rod in the crust breaking air cylinder front end cover. Positioning pull rods are symmetrically connected to the crust breaking air cylinder front end cover in a penetrating mode, a sealing ring cover is installed on the outer wall of the side, back to the air cylinder body, of the crust breaking air cylinder front end cover, the sealing ring cover is connected with the crust breaking air cylinder front end cover through a locking bolt, and a dust scraping ring is arranged in the sealing ring cover and located on the peripheral side of a piston rod; the sealing structure adopts a stepped relay operation mode and comprises at least two sealing rings, a first sealing ring is arranged in one side, opposite to the sealing ring cover, of the crust breaking air cylinder front end cover, and a second sealing ring is arranged in one end, close to the sealing ring cover, of the shaft sleeve piece.

Description

Technical Field

[0001] The utility model belongs to the technical field of shell-breaking cylinders, in particular to a front end cover sealing structure for a shell-breaking cylinder. Background Art

[0002] The shell-breaking cylinder on the electrolytic cell in the electrolytic aluminum workshop is used to open a hole on the hard shell surface of the electrolyte in the electrolytic cell for feeding. The existing shell-breaking cylinder uses a traditional sealing method at the front end. When the shell-breaking cylinder is subjected to lateral force and large impact force during operation, it is particularly easy to be damaged, resulting in a short cylinder life and frequent maintenance. The existing sealing structure is a single sealing ring structure, and the dust ring is also single. In the high temperature and high dust environment of the aluminum plant, fine aluminum oxide dust can easily enter the cylinder through the single dust ring and the single sealing ring, causing the relevant seals in the cylinder to be damaged due to wear, and finally the cylinder function fails.

[0003] After searching, the existing Chinese patent publication number: CN216922694U is a liftable shell-breaking cylinder, which includes a cylinder body, a piston, a piston rod, an exhaust end cylinder cover and a sleeve. The piston is arranged in the cylinder body, one end of the piston rod is connected to the piston, and the other end extends out of the cylinder body and is connected to the hammer head; the exhaust end cylinder cover covers the end of the cylinder body close to the hammer head, the sleeve is sleeved on the piston rod and is sealed with the exhaust end cylinder cover and the piston rod, and the sleeve is a nylon sleeve; an O-ring is provided at the connection between the outer end of the sleeve and the piston rod; a support seat is installed on the middle section of the cylinder body, and a lifting device is fixedly connected to the support seat.

[0004] The cited patent document also has the same problem. The sealing structure is a single sealing ring structure, and the dust ring is also single. In the high temperature and high dust environment of the aluminum plant, fine alumina dust can easily enter the cylinder through the single dust ring and the single sealing ring, causing the related seals in the cylinder to be damaged due to wear, and finally the cylinder function fails. Utility Model Content

[0005] The utility model aims to provide a front end cover sealing structure for a shell breaking cylinder to solve the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a front end cover sealing structure for a shelling cylinder, comprising a front end cover of the shelling cylinder and a piston rod passing through it, the free end of the piston rod being fixedly connected with a connecting plug, the circumference of the piston rod being provided with a shaft kit in the front end cover of the shelling cylinder, a positioning pull rod being symmetrically passed through and connected to the front end cover of the shelling cylinder, and a sealing ring cover being installed on the outer wall on the side away from the cylinder body, the sealing ring cover being connected to the front end cover of the shelling cylinder through a locking bolt, a dust scraper ring being provided inside the sealing ring cover and on the circumference of the piston rod, the sealing structure adopts a stepped relay operation mode, comprising at least two sealing rings, wherein a first sealing ring is provided inside the side of the front end cover of the shelling cylinder facing away from the sealing ring cover, and a second sealing ring is provided inside the end of the shaft kit close to the sealing ring cover.

[0007] In the preferred embodiment of the present invention, the inner wall of one side of the sealing ring cover close to the front end cover of the shell-breaking cylinder is provided with a groove for the shaft kit to extend and be clamped and installed.

[0008] In the present solution, the scraper ring is preferably arranged in the groove and located on the peripheral side of the piston rod, and the scraper ring is located in the sealing ring cover and on a side facing away from the shaft kit.

[0009] Preferably, in this solution, a circular sealing ring is embedded in the outer wall of the scraper ring and in the groove of the sealing ring cover.

[0010] Preferably, in this solution, a silicone sealing gasket is provided between the front end cover of the shell breaking cylinder and the sealing ring cover and around the circumference of the piston rod.

[0011] Preferably, in the present solution, a receiving ring sleeve is provided in the groove near one end of the shaft sleeve and is sleeved on the circumference of the piston rod, and a second sealing ring is embedded in the receiving ring sleeve, and the second sealing ring is provided toward the side of the scraper ring.

[0012] Preferably, in this solution, the first sealing ring bears all the pressure and sealing function under normal working conditions, and when the first sealing ring fails, the second sealing ring automatically takes over the pressure and sealing.

[0013] Preferably, in this solution, when the scraper ring fails, the second sealing ring takes over the dust prevention task, thereby ensuring the cleanliness and sealing of the interior of the cylinder in a relay manner.

[0014] Compared with the prior art, the technical effects and advantages of the utility model are as follows:

[0015] The front end cover sealing structure of the shelling cylinder adopts a stepped relay sealing structure. When the first sealing ring fails, the second sealing ring can automatically take over the work, avoiding the overall failure of the cylinder due to the failure of a single sealing ring, and significantly improving the service life and reliability of the cylinder;

[0016] By adding multiple sealing rings and scraper rings, as well as silicone sealing gaskets and other sealing measures, dust and impurities are effectively prevented from entering the cylinder, significantly improving the overall sealing performance of the cylinder and reducing the risk of air leakage;

[0017] The relay seal design reduces the need for frequent replacement of seals. At the same time, the unique scraper ring design can effectively reduce the wear of the seals caused by dust, indirectly reducing maintenance costs and downtime. The seal structure design fully considers the harsh working conditions of high temperature and high dust, ensuring high sealing and stability in extreme environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0020] Figure 2 For this utility model Figure 1 The enlarged schematic diagram of point A in the middle;

[0021] Figure 3 For this utility model Figure 1 A magnified schematic diagram of point B in the middle.

[0022] Description of reference numerals:

[0023] In the figure: 1. The first sealing ring; 2. The shaft kit; 3. The front end cover of the shell cylinder; 4. The positioning rod; 5. The sealing ring cover; 6. The circular ring sealing ring; 7. The locking bolt; 8. The scraper ring; 9. The silicone sealing gasket; 10. The receiving ring sleeve; 11. The second sealing ring. DETAILED DESCRIPTION

[0024] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0025] Unless otherwise defined, the directions of up, down, left, right, front, back, inside and outside involved in this document are based on the directions of up, down, left, right, front, back, inside and outside in the figures shown in the present utility model, and are explained here together.

[0026] This embodiment discloses Figures 1 to 3 The front end cover sealing structure for a shelling cylinder shown in the figure comprises a front end cover 3 of the shelling cylinder and a piston rod passing therethrough, the free end of the piston rod is fixedly connected with a connecting plug, and a shaft set 2 is sleeved in the front end cover 3 of the shelling cylinder on the circumferential side of the piston rod to ensure that the shaft set and the piston rod fit tightly and can slide smoothly; a positioning pull rod 4 is symmetrically connected and penetrated through the front end cover 3 of the shelling cylinder to ensure a firm connection and accurate positioning between the front end cover and the cylinder body, and a sealing ring cover 5 is installed on the outer wall on the side away from the cylinder body, and the sealing ring cover 5 is connected to the front end cover 3 of the shelling cylinder by a locking bolt 7 to form a preliminary external seal; a dust scraper ring 8 is arranged inside the sealing ring cover 5 and on the circumferential side of the piston rod, and the sealing structure adopts a stepped relay operation mode, including at least two sealing rings, wherein a first sealing ring 1 is provided inside the side of the front end cover 3 of the shelling cylinder facing away from the sealing ring cover 5, and a second sealing ring 11 is provided inside the end of the shaft set 2 close to the sealing ring cover 5.

[0027] In this embodiment, a groove is formed on the inner wall of one side of the sealing ring cover 5, which is close to the front end cover 3 of the shell-breaking cylinder, for the shaft kit 2 to extend and be clamped and installed. The scraper ring 8 is arranged in the groove and is located on the peripheral side of the piston rod, ensuring that it is located on the peripheral side of the piston rod and has a certain interval with the shaft kit. The scraper ring faces the side away from the shaft kit to remove impurities and dust that may invade; the scraper ring 8 is located in the sealing ring cover 5 and on the side facing away from the shaft kit 2, and a circular sealing ring 6 is embedded in the outer wall of the scraper ring 8 and in the groove of the sealing ring cover 5 to enhance the sealing performance and prevent dust and liquid from entering; a receiving ring sleeve 10 is provided in the groove near one end of the shaft kit 2 and is sleeved on the peripheral side of the piston rod, and a second sealing ring 11 is embedded in the receiving ring sleeve 10, and the second sealing ring 11 is arranged toward one side of the scraper ring 8 to form a stepped relay sealing structure.

[0028] In this embodiment, a silicone sealing gasket 9 is provided between the front end cover 3 of the shell breaking cylinder and the sealing ring cover 5 and around the circumference of the piston rod to provide double sealing protection.

[0029] In this embodiment, the first sealing ring 1 bears all the pressure and sealing functions under normal working conditions. When the first sealing ring 1 fails, the second sealing ring 11 automatically takes over the pressure and sealing. When the scraper ring 8 fails, a seamless transition is achieved, extending the service life of the cylinder. The second sealing ring 11 takes over the dust prevention task, thereby ensuring the cleanliness and sealing of the inside of the cylinder in a relay manner.

[0030] Working principle:

[0031] The shelling cylinder uses a front end cover sealing structure. During operation, the piston rod reciprocates under the action of gas pressure. The first sealing ring 1 is located inside the front end cover 3 of the shelling cylinder. It firstly plays a role in resisting the leakage of high-pressure gas and at the same time prevents external dust and impurities from entering the cylinder. During the movement of the piston rod, the dust scraper ring 8 can effectively remove dust particles attached to the surface of the piston rod and the inner wall of the cylinder to prevent them from damaging the sealing structure.

[0032] When the first sealing ring 1 is worn or damaged due to long-term operation, the second sealing ring 11 is arranged inside the end of the shaft set 2 close to the sealing ring cover 5, as a relay sealing backup, automatically assuming the pressure and sealing function originally borne by the first sealing ring 1, thus forming a step-by-step relay operation mode, effectively extending the service life of the cylinder;

[0033] In addition, the sealing ring cover 5 is fixed to the front end cover 3 of the shell-breaking cylinder by a locking bolt 7, and the internal groove and the shaft kit 2, the scraper ring 8, the circular seal ring 6, the silicone sealing gasket 9 and the receiving ring sleeve 10 and other multiple sealing structures work together to comprehensively enhance the sealing effect and dustproof ability of the cylinder.

[0034] It should be noted that, in this article, relational terms such as one and two are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0035] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A front end cover sealing structure for a shell breaking cylinder, characterized in that: The invention comprises a front end cover (3) of a shelling cylinder and a piston rod passing through the front end cover (3), wherein the free end of the piston rod is fixedly connected with a connecting plug, and the piston rod is provided with a shaft set (2) on the circumference of the piston rod in the front end cover (3) of the shelling cylinder, and a positioning pull rod (4) is symmetrically connected to and passes through the front end cover (3) of the shelling cylinder, and a sealing ring cover (5) is installed on the outer wall on the side facing away from the cylinder body, and the sealing ring cover (5) is connected to the front end cover (3) of the shelling cylinder through a locking bolt (7), and a dust scraper ring (8) is provided inside the sealing ring cover (5) and on the circumference of the piston rod, and the sealing structure adopts a stepped relay operation mode, and comprises at least two sealing rings, wherein the front end cover (3) of the shelling cylinder has a first sealing ring (1) inside on the side facing away from the sealing ring cover (5), and the shaft set (2) has a second sealing ring (11) inside on the end close to the sealing ring cover (5).

2. A front end cover sealing structure for a shell breaking cylinder according to claim 1, characterized in that: The inner wall of one side of the sealing ring cover (5) which is in close contact with the front end cover (3) of the shell-breaking cylinder is provided with a groove for the shaft set (2) to extend and be clamped for installation.

3. A front end cover sealing structure for a shell breaking cylinder according to claim 2, characterized in that: The scraper ring (8) is arranged in the groove and is located on the circumference of the piston rod. The scraper ring (8) is located in the sealing ring cover (5) and is on a side facing away from the shaft sleeve (2).

4. A front end cover sealing structure for a shell breaking cylinder according to claim 3, characterized in that: A circular sealing ring (6) is embedded in the outer wall of the scraper ring (8) and in the groove of the sealing ring cover (5).

5. A front end cover sealing structure for a shell breaking cylinder according to claim 4, characterized in that: A silicone sealing gasket (9) is sleeved between the front end cover (3) of the shell breaking cylinder and the sealing ring cover (5) and around the circumference of the piston rod.

6. A front end cover sealing structure for a shell breaking cylinder according to claim 5, characterized in that: A receiving ring sleeve (10) sleeved on the circumference of the piston rod is arranged in the groove near one end of the shaft sleeve (2), and a second sealing ring (11) is embedded in the receiving ring sleeve (10), and the second sealing ring (11) is arranged towards the side of the scraper ring (8).

7. A front end cover sealing structure for a shell breaking cylinder according to claim 6, characterized in that: The first sealing ring (1) bears all the pressure and sealing functions under normal working conditions, and when the first sealing ring (1) fails, the second sealing ring (11) automatically takes over the pressure and sealing.

8. A front end cover sealing structure for a shell breaking cylinder according to claim 7, characterized in that: When the scraper ring (8) fails, the second sealing ring (11) takes over the dust prevention task, thereby ensuring the cleanliness and sealing of the interior of the cylinder in a relay manner.

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