Sealing element of plastic melting kettle

Abstract

The plastic melting kettle sealing element comprises an isolation cover, a cooling water jacket, a rotating shaft and a refrigeration water tank, a movable ring assembly is fixedly installed on the side wall of the rotating shaft, a contact ring is arranged at the bottom of the movable ring assembly, an annular pressing groove is formed in the top of a middle ring of the cooling water jacket, a static ring gasket is arranged in the annular pressing groove, and a static ring is tightly attached to the top of the static ring gasket. Cooling water is introduced into the cooling water jacket, the cooling area on the lower side can be used for cooling heat moving upwards firstly, the cooling area on the upper side can be used for cooling the rotating contact face between the movable ring assembly and the static ring, the heating temperature of a sealing piece is reduced by controlling the cooling water, and therefore the sealing piece is not prone to falling off, and the service life of the sealing piece is prolonged. And a high-temperature-resistant graphite plate is selected as an elastic contact ring piece to ensure the sealing airtightness of the mechanical seal, and through the design of the structure and the material of the mechanical seal, long-term stable operation of equipment is ensured, the use efficiency of the equipment is improved, and the cost is saved.

Description

Technical Field

[0001] This patent relates to the field of seal technology, specifically plastic melting kettle seals. Background Art

[0002] Plastic melting kettle is used to melt waste plastics. In order to increase the overall heating effect of the plastic, the internal stirring rod is driven by a motor to stir the plastic. The mechanical seal on the existing kettle body is a full metal structure. In actual use, the mechanical equipment is in a high-temperature working environment. In a high-temperature environment, the sealing components are easily deformed and carbonized by heat, which seriously affects the sealing performance, shortens the service life of the equipment, and also brings great safety hazards. For this reason, we propose a plastic melting kettle seal. Utility Model Content

[0003] The purpose of this patent is to provide a plastic melting kettle seal to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, this patent provides the following technical solutions: a plastic melting kettle seal, including an isolation cover, a cooling water jacket, a rotating shaft and a refrigeration water tank, a dynamic ring assembly is fixedly installed on the side wall of the rotating shaft, a contact ring is provided at the bottom of the dynamic ring assembly, an annular pressure groove is provided at the top of the middle ring of the cooling water jacket, a static ring gasket is provided in the annular pressure groove, the top of the static ring gasket is tightly fitted with a static ring, the outer wall of the static ring is provided with an annular boss, a static ring pressure cover is tightly fitted on the annular boss, mounting holes are provided on the left and right sides of the top of the static ring pressure cover, bolts are provided in the mounting holes, the bottom ends of the bolts are screwed to the top of the middle ring of the cooling water jacket, the bottom of the contact ring is slidably installed on the top of the static ring, water outlets are provided on the upper and lower sides of the left end of the side wall of the cooling water jacket, and water inlets are provided on the upper and lower sides of the right end of the side wall of the cooling water jacket, and the water outlet and water inlet are circulatedly connected to the refrigeration water tank through hoses.

[0005] Preferably, a copper tube is fixedly mounted on the inner side wall of the cooling water jacket, and a copper block is integrally formed on the outer side wall of the copper tube.

[0006] Preferably, the refrigeration water tank includes a box body, cooling water is provided in the box body, the front and rear side walls of the box body are provided with installation ports, the inner side walls of the installation ports are fixedly installed with semiconductor refrigeration plates, the cold surface of the semiconductor refrigeration plates is located in the box body, and the hot surface of the semiconductor refrigeration plates is located outside the box body, a connector is embedded in the left side of the top of the box body, there are two connectors, and the two connectors are respectively connected to the two water outlets through the two hoses, a water pump is installed on the right side of the top of the box body, the output end of the water pump is connected to a tee, and the two ends of the tee are respectively connected to the two water inlets through the two hoses.

[0007] Preferably, mounting plates are fixedly mounted on both left and right ends of the bottom of the front side of the box.

[0008] Preferably, the bolt includes a circular plate, a stud is integrally formed at the bottom of the circular plate, a circular groove is provided on the side wall of the stud, a circular ring is rotatably installed in the circular groove, positioning blocks are provided at both ends of the outer wall of the circular ring, and positioning grooves are provided at both ends of the inner wall of the mounting hole, and the positioning blocks are inserted into the positioning grooves.

[0009] Preferably, a slot is provided on the top of the circular plate.

[0010] Compared with the existing technology, the beneficial effects of this patent are: by introducing cooling water into the interior of the cooling water jacket, the cooling area on the lower side can first cool the heat that moves upward, and the cooling area on the upper side can cool the rotating contact surface between the dynamic ring assembly and the static ring. By controlling the cooling water, the heating temperature of the seal is reduced, and high-temperature resistant graphite plates are selected as elastic contact rings to ensure the sealing and airtightness of the mechanical seal. By designing the structure and materials of the mechanical seal, the long-term stable operation of the equipment is guaranteed, the equipment utilization efficiency is improved, and costs are saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the overall schematic diagram of this patent.

[0012] Figure 2 This is a three-dimensional diagram of the refrigeration water tank of this patent.

[0013] Figure 3 This is a schematic diagram of the partial structure of this patent.

[0014] In the figure: 1. Isolation cover, 2. Dynamic ring assembly, 3. Contact ring, 4. Cooling water jacket, 5. Annular pressure groove, 6. Static ring gasket, 7. Static ring, 8. Static ring pressure cover, 9. Bolt, 10. Rotating shaft, 11. Refrigeration water tank, 12. Copper pipe, 13. Box body, 14. Mounting port, 15. Semiconductor refrigeration plate, 16. Connector, 17. Water pump, 18. Tee pipe, 19. Mounting plate, 20. Round plate, 21. Stud, 22. Annular groove, 23. Circular ring, 24. Positioning block. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of this patent to clearly and completely describe the technical solutions in the embodiments of this patent. Obviously, the embodiments described are only part of the embodiments of this patent, not all of them. Based on the embodiments of this patent, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this patent.

[0016] See also Figure 1 、 Figure 2and Figure 3 This patent provides a technical solution: a plastic melting kettle seal, including an isolation cover 1, a cooling water jacket 4, a rotating shaft 10 and a refrigeration water tank 11. A dynamic ring assembly 2 is fixedly installed on the side wall of the rotating shaft 10, and a contact ring 3 is provided at the bottom of the dynamic ring assembly 2. The top of the middle ring of the cooling water jacket 4 is provided with an annular pressure groove 5, and a static ring gasket 6 is provided in the annular pressure groove 5. The top of the static ring gasket 6 is tightly fitted with a static ring 7, and the outer wall of the static ring 7 is provided with an annular boss, and a static ring pressure cover 8 is tightly fitted on the annular boss. Mounting holes are provided on the left and right sides of the top of the static ring pressure cover 8, and bolts 9 are provided in the mounting holes. The bottom end of the bolt 9 is screwed to the top of the middle ring of the cooling water jacket 4, and the bottom of the contact ring 3 is slidably installed on the top of the static ring 7. Water outlets are provided on the upper and lower sides of the left end of the side wall of the cooling water jacket 4, and water inlets are provided on the upper and lower sides of the right end of the side wall of the cooling water jacket 4. The water outlet and the water inlet are circulated and connected to the refrigeration water tank 11 through a hose.

[0017] Bolt holes are provided at the bottom edge of the cooling water jacket 4 , and the cooling water jacket 4 can be fixed to the top of the melting kettle body by fastening bolts passing through the bolt holes.

[0018] The contact ring 3 is made of high-temperature resistant graphite plate.

[0019] Specifically, a copper tube 12 is fixedly mounted on the inner wall of the cooling water jacket 4 , and a copper block is integrally formed on the outer wall of the copper tube 12 .

[0020] The copper tube 12 is made of pure copper and can increase the heat exchange rate between the inner cooling water entering the bottom of the cooling water jacket 4 and the middle annular space thereof and this space.

[0021] Specifically, the refrigeration water tank 11 includes a box body 13, in which cooling water is provided. The front and rear side walls of the box body 13 are provided with installation openings 14, and the inner side walls of the installation openings 14 are fixedly installed with semiconductor refrigeration plates 15. The cold surface of the semiconductor refrigeration plates 15 is located inside the box body 13, and the hot surface of the semiconductor refrigeration plates 15 is located outside the box body 13. A connector 16 is embedded on the left side of the top of the box body 13. There are two connectors 16, and the two connectors 16 are respectively connected to the two water outlets through two hoses. A water pump 17 is installed on the right side of the top of the box body 13, and the output end of the water pump 17 is connected to a tee pipe 18. The two ends of the tee pipe 18 are respectively connected to the two water inlets through two hoses.

[0022] The input end of the water pump 17 may extend to the internal cooling water of the tank 13 through a water pipe.

[0023] The semiconductor refrigeration sheet 15 can cool the cooling water in the box body 13 .

[0024] Specifically, mounting plates 19 are fixedly mounted on both left and right ends of the bottom of the front side of the box body 13 .

[0025] like Figure 2 As shown, bolt holes are also provided on the mounting plate 19, and the front ends of the two mounting plates 19 can be placed on the left and right sides of the bottom of the cooling water jacket 4 respectively, so that the cooling water jacket 4 and the box body 13 can be simultaneously installed on the top of the melting kettle body through the same set of fastening bolts.

[0026] Specifically, the bolt 9 includes a circular plate 20, and a stud 21 is integrally formed at the bottom of the circular plate 20. A circular groove 22 is provided on the side wall of the stud 21, and a circular ring 23 is rotatably installed in the circular groove 22. Positioning blocks 24 are provided at both ends of the outer wall of the circular ring 23, and positioning grooves are provided at both ends of the inner wall of the mounting hole, and the positioning blocks 24 are inserted into the positioning grooves.

[0027] When the bottom end of the stud 21 is screwed into the top thread groove of the middle ring of the cooling water jacket 4, it is inserted into the positioning groove through the positioning block 24. At this time, the static ring cover 8 can be positioned to locate the pressing position of the static ring cover 8 and the annular boss on the static ring 7.

[0028] Specifically, a slot is provided on the top of the circular plate 20 .

[0029] The slot can be a cross slot, which is convenient for inserting a cross screwdriver into the slot and convenient for rotating the bolt 9.

[0030] Working principle: When the rotating shaft 10 rotates following the motor on the plastic melting kettle, the contact ring 3 at the bottom of the dynamic ring assembly 2 rotates and slides on the top of the static ring 7 to form a dynamic seal. The tightening of the bolt 9 presses the static ring pressure cover 8 against the annular boss on the static ring 7, and then the static ring 7 presses the static ring gasket 6 into the annular pressure groove 5 to form a static seal. At the same time, the water pump 17 draws the cooling water in the box 13 into the two areas in the cooling water jacket 4. The cooling water on the lower side can exchange heat with the space between the bottom of the cooling water jacket 4 and its middle ring, and the cooling water on the upper side can cool the dynamic sealing contact surface of the contact ring 3 and the static ring 7.

[0031] It should be noted that the equipment structure and drawings of this patent mainly describe the principles of this patent. In terms of the technology of this design principle, the settings of the device's power mechanism, power supply system and control system are not fully described. However, on the premise that those skilled in the art understand the principles of the above patent, they can clearly know the details of its power mechanism, power supply system and control system.

[0032] In the description of this patent, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "two ends", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation; at the same time, unless otherwise clearly specified and limited, the terms "disposed", "installed", "connected", "fixed installation", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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 internal communication between two elements or an interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in this patent according to specific circumstances.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Plastic melting kettle seal, characterized by: The invention comprises an isolation cover (1), a cooling water jacket (4), a rotating shaft (10) and a refrigeration water tank (11), wherein a dynamic ring assembly (2) is fixedly mounted on the side wall of the rotating shaft (10), a contact ring (3) is provided at the bottom of the dynamic ring assembly (2), an annular pressure groove (5) is provided at the top of the middle ring of the cooling water jacket (4), a static ring gasket (6) is provided in the annular pressure groove (5), a static ring (7) is tightly fitted on the top of the static ring gasket (6), an annular boss is provided on the outer side wall of the static ring (7), and the annular boss is tightly fitted on the A static ring pressure cover (8) is provided, and mounting holes are provided on both the left and right sides of the top of the static ring pressure cover (8), and bolts (9) are provided in the mounting holes. The bottom ends of the bolts (9) are screwed to the top of the middle ring of the cooling water jacket (4), and the bottom of the contact ring (3) is slidably installed on the top of the static ring (7). Water outlets are provided on the upper and lower sides of the left end of the side wall of the cooling water jacket (4), and water inlets are provided on the upper and lower sides of the right end of the side wall of the cooling water jacket (4). The water outlet and the water inlet are circulatedly connected to the refrigeration water tank (11) through a hose.

2. The plastic melting kettle seal according to claim 1, characterized in that: A copper tube (12) is fixedly mounted on the inner side wall of the cooling water jacket (4), and a copper block is integrally formed on the outer side wall of the copper tube (12).

3. The plastic melting kettle seal according to claim 1, characterized in that: The refrigeration water tank (11) comprises a box body (13), wherein cooling water is provided in the box body (13), and the front and rear side walls of the box body (13) are both provided with mounting openings (14), and the inner side wall of the mounting opening (14) is fixedly provided with a semiconductor refrigeration plate (15), wherein the cold surface of the semiconductor refrigeration plate (15) is located inside the box body (13), and the hot surface of the semiconductor refrigeration plate (15) is located outside the box body (13), and a connector (16) is embedded on the left side of the top of the box body (13), wherein the two connectors (16) are respectively connected to the two water outlets through the two hoses, and a water pump (17) is installed on the right side of the top of the box body (13), wherein the output end of the water pump (17) is connected to a three-way pipe (18), and the two ends of the three-way pipe (18) are respectively connected to the two water inlets through the two hoses.

4. The plastic melting kettle seal according to claim 3, characterized in that: Mounting plates (19) are fixedly mounted on both left and right ends of the bottom of the front side of the box body (13).

5. The plastic melting kettle seal according to claim 1, characterized in that: The bolt (9) comprises a circular plate (20), a stud (21) is integrally formed at the bottom of the circular plate (20), a circular groove (22) is provided on the side wall of the stud (21), a circular ring (23) is rotatably mounted in the circular groove (22), positioning blocks (24) are provided at both left and right ends of the outer wall of the circular ring (23), and positioning grooves are provided at both left and right ends of the inner wall of the mounting hole, and the positioning blocks (24) are inserted into the positioning grooves.

6. The plastic melting kettle seal according to claim 5, characterized in that: A slot is provided on the top of the circular plate (20).

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