Sealing device for air cylinder of internal mixer

Abstract

The utility model relates to the technical field of internal mixer cylinder sealing structures, and discloses an internal mixer cylinder sealing device which comprises a bottom plate, a cylinder body is arranged on the upper side face of the bottom plate, a fixing seat is arranged on the upper side face of the cylinder body, a cylinder piston rod is movably installed between the cylinder body and the fixing seat, and the cylinder piston rod is connected with the bottom plate. A through groove is formed in the fixing base, a sealing pipe sleeve attached to the outer wall of a piston rod of the air cylinder is installed in the through groove of the fixing base, limiting insertion blocks are arranged on the left side face and the right side face of the fixing base correspondingly, limiting grooves are longitudinally formed in the side walls of the limiting insertion blocks, and two limiting clamping plates attached to the rod wall of the piston rod of the air cylinder are installed on the upper side face of the fixing base. The sealing pipe sleeve is installed in the fixing seat, so that the sealing performance of movement of the piston rod of the air cylinder can be guaranteed, the installation positions of the two limiting clamping plates can be limited by penetrating the limiting inserting block through the inserting groove in the connecting plate, the limiting inserting piece penetrates through the limiting groove to fix the position of the connecting plate, and therefore the sealing pipe sleeve can be fixed in the fixing seat.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinder sealing structures of internal mixers, and more specifically to a cylinder sealing device of internal mixers. Background Art

[0002] The internal mixer for polymer granulation requires a cylinder to control the pressure hammer to allow the material to enter the internal mixing chamber. The working principle of the cylinder is: the pressure of the compressed air is converted into mechanical energy in the pneumatic transmission to drive the actuator of the linear reciprocating motion of the mechanism. When compressed air is input from one end of the rodless chamber and the rod chamber is exhausted, the pressure difference between the two chambers of the cylinder acts on the piston to form a force that pushes the piston to move and extend the piston rod; when the rod chamber is inlet and the rodless chamber is exhausted, the piston rod is retracted. If the rod chamber and the rodless chamber are alternately inlet and exhaust, the piston realizes reciprocating linear motion.

[0003] The internal mixer cylinder currently used usually has a sealing device installed at the connection position between the piston rod and the cylinder body to ensure the sealing of the cylinder body during the movement of the piston rod. However, there are still some problems in the structural setting of the existing sealing device. Usually, the sealing device is combined with the piston rod through a sealing ring and other structures to maintain the sealing connection effect. However, the sealing structure is easily worn during repeated movement, thereby reducing the sealing effect. However, the existing sealing device is not convenient to disassemble and assemble, resulting in inconvenient replacement of the internal sealing structure, increasing the difficulty of replacement, causing inconvenience in operation, and affecting the use effect. Utility Model Content

[0004] In order to overcome the above defects of the prior art, the utility model provides a cylinder sealing device for an internal mixer to solve the problems existing in the above background technology.

[0005] The utility model provides the following technical solutions:

[0006] A cylinder sealing device for an internal mixer comprises a base plate, a cylinder body is arranged on the upper side surface of the base plate, a fixing seat is arranged on the upper side surface of the cylinder body, a cylinder piston rod is movably installed between the cylinder body and the fixing seat, a sealing sleeve that fits with the outer wall of the cylinder piston rod is installed inside the through groove of the fixing seat, limiting blocks are arranged on the left and right sides of the fixing seat, limiting grooves are longitudinally provided on the side walls of the limiting blocks, two limiting splints that fit with the rod wall of the cylinder piston rod are installed on the upper side surface of the fixing seat, connecting plates are arranged on the lower side plate walls of the limiting splints on both sides, slots that are combined with the limiting blocks are provided on the plate walls of the connecting plates, and limiting plugs that fit with the connecting plates are installed inside the limiting grooves.

[0007] Further: the sealing tube sleeve comprises a fixed tube, a sealing sleeve is arranged on the inner tube wall of the fixed tube, support blocks are arranged on the upper side edges of the left and right tube walls of the fixed tube, and buckle grooves are opened on the sides of the support blocks on both sides.

[0008] Furthermore: a groove corresponding to the support block is provided on the upper side surface of the fixing seat, and the longitudinal width of the support block is the same as that of the groove.

[0009] Furthermore: connecting grooves connected to the connecting plate are provided on the left and right sides of the fixing seat, and the lateral widths of the connecting plate and the connecting groove are the same.

[0010] Further: semi-ring sealing gaskets are installed on the groove wall positions of the semi-circular arc grooves of the two limiting clamps, and buckle grooves 2 corresponding to the positions of the semi-ring sealing gaskets are arranged on the side edges of the limiting clamps.

[0011] Further: the limiting plug-in includes a limiting plug-in plate, a pulling block is arranged on the upper side of the limiting plug-in plate, and a limiting block is arranged on the right side surface of the limiting plug-in plate and is in contact with the upper side of the limiting plug-in block.

[0012] The technical effects of the utility model are:

[0013] 1. By installing a sealing sleeve in the fixed seat, the sealing of the cylinder piston rod can be ensured. The installation position of the two limiting clamps can be limited by passing the limiting plug through the slot on the connecting plate. The limiting plug passes through the limiting groove to fix the position of the connecting plate, so that the sealing sleeve can be fixed inside the fixed seat. Such a limiting structure can facilitate the disassembly and assembly of the sealing sleeve, effectively saving the time required for disassembly and assembly, facilitating operation, and improving the effect of structural coordination.

[0014] 2. The setting of two limit clamps can enhance the sealing of the cylinder piston rod activity, achieving a multi-layer sealing protection effect. Such a structural setting can improve the overall durability, extend the service life, and improve the use effect of the sealing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a partial structural schematic diagram of the utility model.

[0018] Figure 3 It is a structural schematic diagram of the sealing sleeve part in the utility model.

[0019] Figure 4 It is a structural schematic diagram of the left side limiting splint in the utility model.

[0020] Figure 5 It is a structural schematic diagram of the right side limiting splint in the utility model.

[0021] Figure 6 for Figure 1 A magnified view of the structure of part A.

[0022] Figure numerals: 1. Base plate; 2. Cylinder body; 3. Fixed seat; 4. Sealing sleeve; 41. Fixed pipe; 42. Sealing sleeve; 43. Support block; 44. Buckle groove one; 5. Cylinder piston rod; 6. Groove; 7. Connecting groove; 8. Limiting plug-in block; 9. Limiting groove; 10. Limiting splint; 11. Connecting plate; 12. Slot; 13. Semi-ring sealing gasket; 14. Buckle groove two; 15. Limiting plug-in; 16. Limiting plug-in plate; 17. Pull block; 18. Limiting block. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] Embodiment 1:

[0027] Reference Figure 1-6The utility model provides a cylinder sealing device for an internal mixer, comprising a bottom plate 1, a cylinder body 2 is arranged on the upper side of the bottom plate 1, and the cylinder body 2 can improve position stability under the support of the bottom plate 1, a fixing seat 3 is arranged on the upper side of the cylinder body 2, and the fixing seat 3 is installed on the cylinder head of the cylinder body 2, a cylinder piston rod 5 is movably installed between the cylinder body 2 and the fixing seat 3, a sealing sleeve 4 that fits the outer wall of the cylinder piston rod 5 is installed inside the groove of the fixing seat 3, and the sealing performance of the cylinder piston rod 5 during the up and down movement process can be ensured by the setting of the sealing sleeve 4, and the left and right sides of the fixing seat 3 are both provided with limited inserts 8, and the side walls of the limited inserts 8 are provided with A limiting groove 9 is provided longitudinally, and two limiting splints 10 which are in contact with the rod wall of the cylinder piston rod 5 are installed on the upper side surface of the fixing seat 3. The sealing layer of the cylinder piston rod 5 can be increased by clamping the limiting splints 10 on both sides. Connecting plates 11 are provided on the lower side walls of the limiting splints 10 on both sides. A slot 12 which is combined with the limiting plug 8 is provided on the wall of the connecting plate 11. The installation position of the limiting splint 10 can be limited by passing the limiting plug 8 through the slot 12. A limiting plug 15 which is in contact with the connecting plate 11 is installed inside the limiting groove 9. The position of the limiting splint 10 can be fixed by inserting the limiting plug 15. Such a limiting structure facilitates disassembly operation.

[0028] Wherein: the sealing tube sleeve 4 includes a fixed tube 41, a sealing sleeve 42 is arranged on the inner tube wall of the fixed tube 41, support blocks 43 are arranged on the upper side edges of the left and right tube walls of the fixed tube 41, and buckle grooves 44 are opened on the sides of the support blocks 43 on both sides; the setting of the fixed tube 41 can ensure the strength of the sealing sleeve 42, play a supporting role, and facilitate the separate replacement of the sealing sleeve 42, and the setting of the buckle grooves 44 on the support blocks 43 can increase the fulcrum points, which is convenient for taking out the whole.

[0029] Wherein: a groove 6 corresponding to the support block 43 is opened on the upper side of the fixing seat 3, and the longitudinal width of the support block 43 is the same as that of the groove 6; the provision of the groove 6 can prevent the support block 43 from protruding, thereby achieving a flush installation effect.

[0030] Wherein: connecting grooves 7 combined with the connecting plate 11 are provided on the left and right sides of the fixing seat 3, and the lateral width of the connecting plate 11 is the same as that of the connecting groove 7; the installation position of the connecting plate 11 can be hidden by setting the connecting groove 7 so that it remains flush with the fixing seat 3.

[0031] Among them: semi-circular arc grooves of the two limiting clamps 10 are both installed with semi-ring sealing gaskets 13, and the side edges of the limiting clamps 10 are both provided with buckle grooves 14 corresponding to the positions of the semi-ring sealing gaskets 13; the semi-ring sealing gaskets 13 can fit with the outer wall of the cylinder piston rod 5 to increase the sealing performance.

[0032] Among them: the limiting plug-in 15 includes a limiting plug-in plate 16, a pulling block 17 is arranged on the upper side of the limiting plug-in plate 16, and a limiting block 18 is arranged on the right side of the limiting plug-in plate 16 to fit with the upper side of the limiting plug-in block 8; the limiting plug-in plate 16 can be conveniently removed by cooperating with the pulling block 17, and the setting of the limiting block 18 can limit the position of the limiting plug-in plate 16.

[0033] Working principle:

[0034] Firstly, the setting of the sealing sleeve 4 can ensure the sealing during the repeated movement of the cylinder piston rod 5. The setting of the two limiting clamps 10 can limit the position of the sealing sleeve 4. At the same time, the setting of the semi-ring sealing gasket 13 can increase the sealing performance and achieve a multi-layer sealing effect. When the sealing sleeve 4 needs to be disassembled and replaced, the limiting plug-in 15 can be removed first to make the connecting plate 11 lose the restriction. In this way, the limiting clamps 10 on both sides can be pulled outward to separate from the fixing seat 3, so that the sealing sleeve 4 can be seen. Then the sealing sleeve 4 can be taken out through the position of the groove 6, so as to complete the disassembly operation. Then, the sealing sleeve 42 on the sealing sleeve 4 can be replaced and reinstalled. Finally, the replacement operation can be completed by installing the limiting clamp 10. Such a structural setting can effectively save replacement time, facilitate operation, and improve the effect of structural coordination.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cylinder sealing device for an internal mixer, comprising a bottom plate (1), characterized in that: A cylinder body (2) is arranged on the upper side of the bottom plate (1), a fixing seat (3) is arranged on the upper side of the cylinder body (2), a cylinder piston rod (5) is movably mounted between the cylinder body (2) and the fixing seat (3), a sealing sleeve (4) which is in contact with the outer wall of the cylinder piston rod (5) is mounted inside the through groove of the fixing seat (3), and limit plugs (8) are arranged on the left and right sides of the fixing seat (3), and the side walls of the limit plugs (8) are A limit groove (9) is longitudinally provided on the upper side, two limit clamps (10) are installed on the upper side surface of the fixing seat (3) and are in contact with the rod wall of the cylinder piston rod (5), and connecting plates (11) are arranged on the lower side wall of the limit clamps (10) on both sides, and a slot (12) combined with the limit plug block (8) is provided on the plate wall of the connecting plate (11), and a limit plug (15) in contact with the connecting plate (11) is installed inside the limit groove (9).

2. The cylinder sealing device of the internal mixer according to claim 1, characterized in that: The sealing tube sleeve (4) comprises a fixed tube (41), a sealing sleeve (42) is arranged on the inner tube wall of the fixed tube (41), support blocks (43) are arranged on the upper side edges of the left and right tube walls of the fixed tube (41), and buckle grooves (44) are arranged on the side edges of the support blocks (43) on both sides.

3. The cylinder sealing device of the internal mixer according to claim 2, characterized in that: A groove (6) corresponding to the support block (43) is provided on the upper side surface of the fixing seat (3), and the longitudinal width of the support block (43) and the groove (6) are the same.

4. The cylinder sealing device of the internal mixer according to claim 1, characterized in that: The left and right sides of the fixing seat (3) are both provided with connection grooves (7) connected to the connection plate (11), and the connection plate (11) and the connection groove (7) have the same transverse width.

5. The cylinder sealing device of the internal mixer according to claim 1, characterized in that: A semi-ring sealing gasket (13) is installed on the groove wall position of the semi-circular arc groove of the two limiting clamps (10), and a buckle groove 2 (14) corresponding to the position of the semi-ring sealing gasket (13) is arranged on the side edge of the limiting clamp (10).

6. The cylinder sealing device of the internal mixer according to claim 1, characterized in that: The limiting plug-in (15) comprises a limiting plug-in plate (16), a pull block (17) is arranged on the upper side of the limiting plug-in plate (16), and a limiting block (18) is arranged on the right side of the limiting plug-in plate (16) and is in contact with the upper side of the limiting plug-in block (8).

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