Sealing protection device for water-based industrial paint mixing kettle processing

Abstract

The utility model relates to technical field of industrial paint processing, concretely relates to a kind of sealing protection device for water-based industrial paint mixing kettle processing, including kettle body and the kettle cover fixed to its top, kettle cover top is equipped with stirring drive mechanism, the output end of stirring drive mechanism is connected with the stirring shaft of being inserted into kettle body, the inner wall of kettle body is fixedly connected with an inner mounting ring, and two groups of protection seats that can be relatively overturned to open and close are hinged on the inner mounting ring by drive shaft. Through the protection seat that can be overturned and closed, a closed cavity that wraps stirring shaft is formed when stirring operation, so that the traditional shaft seal is cavity seal, fundamentally solve the problem of rotary dynamic sealing, in the sealing process, guide sleeve bears the main protection and shaft stabilizing effect, while the labyrinth structure of main sealing flap realizes wearless sealing, finally through end face sealing strip guarantee static seal, then realize multiple protection, greatly improve the reliability and life of sealing.

Description

Technical Field

[0001] This utility model relates to the technical field of industrial paint processing, specifically to a sealing and protective device for processing water-based industrial paint mixing kettles. Background Technology

[0002] In the production process of water-based industrial paints, the paint mixing tank is the core equipment, which mixes and disperses raw materials through the high-speed rotation of the stirring shaft. However, this process inevitably generates a large amount of volatile organic compounds (VOCs), water vapor, and paint mist foam. These substances can escape from the dynamic seal between the tank lid and the stirring shaft, causing environmental pollution, product loss, and safety hazards.

[0003] Currently, traditional sealing solutions in this field mainly rely on mechanical seals or packing seals. These solutions have the following problems:

[0004] Firstly, these are passive seals, which are difficult to compensate for increased sealing gaps caused by shaft runout and wear, easily leading to leakage. Secondly, the seals are in a high-speed rotating and corrosive environment for a long time, resulting in a limited lifespan and requiring frequent shutdowns for maintenance. Finally, traditional top-suction or side-suction exhaust gas collection devices are inefficient and cannot effectively collect pollutants that escape directly from the sealing point. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a sealing and protective device for processing water-based industrial paint mixing tanks, which can achieve the following:

[0006] It isolates pollution sources, has high sealing reliability, and can achieve efficient source collection of waste gas.

[0007] To solve the above-mentioned technical problems, the present invention proposes the following technical solution:

[0008] A sealing and protective device for processing water-based industrial paint mixing tanks includes a tank body and a tank cover fixed to its top. The top of the tank cover is provided with a stirring drive mechanism. The output end of the stirring drive mechanism is connected to a stirring shaft extending into the tank body. An inner mounting ring is fixedly connected to the inner wall of the tank body. Two sets of protective seats that can be opened and closed by rotating relative to each other are hinged to the inner mounting ring via a drive shaft. After the inner ends of the two sets of protective seats are connected, their inner walls and the bottom surface of the tank cover together form a sealed protective chamber for surrounding the stirring shaft. A guide sleeve for radially limiting the stirring shaft is fixedly provided at the inner end of the protective seat. A flow collector is provided at the bottom of the protective seat. An inner conveying pipeline is embedded inside the protective seat. One end of the inner conveying pipeline communicates with the chamber where the flow collector is located, and the other end is connected to a filter box fixed to the tank cover via an outer conveying pipeline. A sealing layer for sealing the dynamic connection part is provided at the hinge between the protective seat and the inner mounting ring.

[0009] Furthermore, the inner side of the guide sleeve is provided with a split sealing mechanism, which consists of two semi-circular sealing petals that are respectively fixed to the inner end faces of the two sets of protective seats. The inner ring wall of the sealing petal is provided with multiple annular toothed grooves to form a non-contact labyrinth seal with the surface of the stirring shaft.

[0010] Furthermore, sealing grooves are formed on the mating surfaces of the two sealing flaps, and sealing strips are embedded in the grooves.

[0011] Furthermore, the sealing strip is made of perfluoroelastomer rubber.

[0012] Furthermore, the inner wall of the guide sleeve is embedded with a wear-resistant bushing made of graphite composite material, which forms a non-contact labyrinth seal with the stirring shaft.

[0013] Furthermore, one of the two sets of protective seats has a horizontally retractable locking pin inside, and the other set has a corresponding locking seat that matches the locking pin.

[0014] Furthermore, the locking pin connects to a small hydraulic drive source located inside the protective seat.

[0015] Furthermore, one end of the drive shaft extends out of the vessel body and is connected to a servo motor that can drive it to rotate. A PTFE lip seal is provided between the drive shaft and the vessel body and inner mounting ring at the protruding part.

[0016] Furthermore, the sealing layer is a transverse corrugated layer, with its top end sealed to the bottom surface of the protective seat and its bottom end sealed to the inner side of the vertical section of the inner mounting ring. The material of the sealing layer is perfluoroether rubber.

[0017] Furthermore, the internal conveying pipeline is a two-way pipe, with its other passage opening in the space between the protective seat and the bottom surface of the vessel lid. The internal conveying pipeline and the external conveying pipeline are connected by a rotary joint.

[0018] The filter box is divided into two chambers. One chamber is equipped with a corrosion-resistant diaphragm vacuum pump connected to the external delivery pipeline, and the other chamber is equipped with a multi-stage filtration layer. The two chambers are connected by a branch pipe. The multi-stage filtration layer includes stainless steel wire mesh, polyester fiber cotton and activated carbon filter cartridge arranged in sequence.

[0019] As can be seen from the above technical solution, the beneficial effects of this utility model are:

[0020] 1. This utility model, through a reversible and closable protective seat, forms a sealed cavity that encloses the stirring shaft during stirring operation, transforming the traditional shaft seal into a cavity seal, fundamentally solving the problem of rotational dynamic sealing. During the sealing process, the guide sleeve undertakes the main protection and shaft stabilization functions, while the labyrinth structure of the main sealing petal achieves wear-free sealing. Finally, the end face sealing strip ensures static sealing, thereby achieving multiple protections and greatly improving the reliability and lifespan of the seal.

[0021] 2. This utility model integrates a flow collector and a conveying pipeline into the protective base to form a waste gas collection system. It can actively suck up the waste gas at the location closest to the point of waste gas generation, i.e. around the stirring shaft. The collection efficiency is much higher than that of traditional external gas collection hoods. At the same time, the dual-pipe design can simultaneously suck up the gas phase aggregate inside the vessel and the part inside the sealed cavity, avoiding the accumulation of waste gas in the cavity and ensuring that the waste gas is introduced into the filter box for treatment.

[0022] 3. In this utility model, the guide sleeve surrounds and limits the stirring shaft, effectively suppressing the radial runout and vibration of the stirring shaft during high-speed operation, extending the service life of the stirring drive mechanism and bearings. The protective seat can be fully opened, providing a large operating space for inspecting and maintaining the stirring shaft, seals, and cleaning the inner wall of the vessel. This avoids the cumbersome operation of disassembling the entire drive mechanism to maintain the seal under traditional structures, greatly reducing maintenance costs and downtime. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0024] Figure 1 This is a front view of the overall structure of this utility model;

[0025] Figure 2 In this utility model Figure 1 Enlarged view of the structure at point A in the middle;

[0026] Figure 3 This is a front view of the internal structure of the filter box in this utility model.

[0027] Figure 4 This is a front view of the guide sleeve connection structure in this utility model.

[0028] Figure label:

[0029] 1. Vessel body; 2. Vessel lid; 3. Stirring drive mechanism; 4. Stirring shaft; 5. Filter box; 6. Inner mounting ring; 7. Protective seat; 8. Guide sleeve; 9. Flow collector; 10. Sealing layer; 11. Inner conveying pipeline; 12. Outer conveying pipeline; 13. Drive shaft; 14. Sealing flap; 15. Sealing strip. Detailed Implementation

[0030] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0031] See Figure 1-4 As shown, a sealing and protective device for processing water-based industrial paint mixing tanks includes a tank body 1 and a tank cover 2 on its top. A stirring drive mechanism 3 is fixedly connected to the center of the top of the tank cover 2. A stirring shaft 4 located vertically in the tank body 1 is fixedly connected to the bottom end of the stirring drive mechanism 3. A filter box 5 is fixedly connected to the top edge of the tank cover 2.

[0032] An inner mounting ring 6 is fixedly connected to the inner wall of the vessel body 1. Two sets of opposing protective seats 7 are flipped and connected to the inner side of the inner mounting ring 6. A drive shaft 13 is provided at the connection between the protective seat 7 and the inner mounting ring 6. A sealing layer 10 is fixedly connected to the bottom of the connection between the protective seat 7 and the inner mounting ring 6.

[0033] A guide sleeve 8 is fixedly connected to the inner end of the protective seat 7, a flow collector 9 is fixedly connected to the bottom surface of the protective seat 7, an inner conveying pipe 11 is embedded inside the protective seat 7, and an outer conveying pipe 12 connected to the filter box 5 is matched to the outer side of the inner conveying pipe 11.

[0034] The protective seat 7 has a vertical through-cavity corresponding to the inner conveying pipe 11. The flow collector 9 is located at the bottom of the cavity, and the bottom end of the inner conveying pipe 11 is embedded in the cavity.

[0035] In this embodiment of the utility model, the inner mounting ring 6 is sealed and connected along the inner wall of the vessel body 1, and its side profile is set in an inverted "L" shape. The protective seat 7 has a trapezoidal side profile, and its top surface is set downward, forming a trapezoidal space between it and the bottom surface of the vessel cover 2, so as to facilitate the arrangement of the inner conveying pipeline 11 in the space. One of the two sets of protective seats 7 has a set of horizontally protruding locking pins embedded in the inner end, while the inner end surface of the other set of protective seats 7 has a locking seat corresponding to the locking pins. The locking pins are set as small hydraulic drives, and their drive source is located inside the corresponding protective seat 7. The guide sleeve 8 is set in two sets corresponding to the two sets of protective seats 7, and is located outside the stirring shaft 4 in a surrounding state.

[0036] The drive shaft 13 and the inner mounting ring 6 are connected by a set of high-strength sealed bearings, which effectively ensures smooth rotation and sealing inside the vessel during actual use. One end of the drive shaft 13 extends outside the vessel body 1, and a servo motor is installed at the outer end. PTFE lip seals are installed at both the points where the drive shaft 13 penetrates the vessel body 1 and the inner mounting ring 6. The sealing surface material is ceramic, and the elastomer is fluororubber. A graphite composite wear-resistant bushing is embedded in the inner wall of the guide sleeve 8, forming a non-contact labyrinth seal with the stirring shaft 4. A split-type sealing mechanism is installed on the inner side of the guide sleeve 8, closer to the root of the stirring shaft 4. The split-type sealing mechanism consists of two semi-circular sealing petals. The device consists of 14 parts, arranged opposite to each other. The sealing petal 14 is fixedly installed on the inner end face of the protective seat 7 by fasteners and is located inside the guide sleeve 8. The inner ring wall of the sealing petal 14 is provided with multiple continuous annular teeth and grooves to form a labyrinth seal. When the protective seat 7 is closed, the two sealing petals 14 close together, and a very narrow, non-contact radial gap is formed between its inner ring labyrinth structure and the surface of the stirring shaft 4 to effectively block the passage of gas and liquid droplets. On the mating end face of the two sealing petals 14, there are sealing grooves respectively, and a sealing strip 15 made of perfluoroether rubber is embedded in the groove. When the protective seat 7 is closed and locked, the sealing strip 15 is fully compressed to ensure the static seal at the mating point of the two sealing petals 14.

[0037] The flow collector 9 is horizontally arranged in a trapezoidal shape along the bottom surface of the protective seat 7. Its opening end has a built-in interception net, which is detachable and faces the stirring shaft 4. The flow collector 9 and the internal chamber of the protective seat 7 are sealed together. The sealing layer 10 is set as a transverse corrugated layer with an arc-shaped side section. The top end is sealed to the bottom surface of the protective seat 7, while the bottom end is sealed to the inner surface of the vertical section of the inner mounting seat 6. The sealing layer 10 is set as a high-strength rubber expansion joint, specifically a perfluoroether rubber corrugated layer. One end of the internal conveying pipe 11 is embedded in the protective seat 7 and is set as a double pipe. One set of pipes is embedded in the chamber inside the protective seat 7, and the other set of pipes is set on the outside along the surface of the protective seat 7 (located in the trapezoidal space between the protective seat 7 and the vessel cover 2).

[0038] The outer end of the inner conveying pipe 11 passes through the vessel body 1 and connects to the outer conveying pipe 12. The inner conveying pipe 11 and the vessel body 1 are sealed at the penetration position. At the same time, a corrosion-resistant rotary joint is provided between the inner conveying pipe 11 and the outer conveying pipe 12. A cleaning port (not shown in the figure) can be reserved on the inner conveying pipe 11 for connecting the cleaning medium. The filter box 5 is provided with two sets of chambers. One set of chambers is provided with a negative pressure mechanism connected to the inner conveying pipe 11, and the other set of chambers is provided with a filter layer. The two sets of chambers are connected by a branch pipe. A discharge pipe is also provided on the surface of the filter box 5. The negative pressure mechanism is specifically set as a corrosion-resistant diaphragm vacuum pump, and the filter layer is specifically set as stainless steel wire mesh, polyester fiber cotton and activated carbon filter cartridge.

[0039] In this device, the two sets of servo motors corresponding to the protective seat 7 are linked and controlled by a PLC to ensure that the two protective seats 7 rotate synchronously. A mechanical synchronizing rod (not shown in the figure) is connected between the ends of the two drive shafts 13 located outside the vessel as a redundancy guarantee for electronic synchronization. At the same time, the working process of this device is controlled by the PLC program. Its logical sequence is as follows: first, start the negative pressure mechanism → drive the protective seat 7 to close → extend the locking pin to lock → allow the stirring drive mechanism 3 to run. When stopping, the sequence is reversed.

[0040] When this device is in use, the external water-based paint enters the vessel body 1 through the feed port on the vessel lid 2. When the stirring shaft 4 stirs it, the drive shaft 13 drives the two sets of protective seats 7 arranged opposite each other to flip inward. The guide sleeve 8 at the inner end of the protective seat 7 forms a surrounding limit on the stirring shaft 4 as the protective seat 7 flips, which helps to enhance the stability of the stirring shaft 4 when it rotates.

[0041] During the stirring process, part of the gas generated is located inside the vessel body 1, and the other part enters the trapezoidal space between the protective seat 7 and the vessel lid 2 through the gap between the guide sleeve 8 and the protective seat 7. At this time, the internal conveying pipeline 11, which is equipped with a negative pressure mechanism, is activated. One end of the double-pass pipe simultaneously draws in the gas inside the vessel body 1 and the gas between the protective seat 7 and the vessel lid 2. The gas enters the filter box 5 through the internal and external conveying pipelines for filtration and is then discharged.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A sealing and protective device for processing water-based industrial paint mixing tanks, comprising a tank body (1) and a tank cover (2) fixed to its top, wherein a stirring drive mechanism (3) is provided on the top of the tank cover (2), and the output end of the stirring drive mechanism (3) is connected to a stirring shaft (4) extending into the tank body (1), characterized in that: An inner mounting ring (6) is fixedly connected to the inner wall of the vessel body (1). Two sets of protective seats (7) that can be flipped relative to each other to open and close are hinged on the inner mounting ring (6) via a drive shaft (13). After the inner ends of the two sets of protective seats (7) are connected, their inner walls and the bottom surface of the lid (2) together form a sealed protective chamber for surrounding the stirring shaft (4); The inner end of the protective seat (7) is fixed with a guide sleeve (8) for radially limiting the stirring shaft (4), and the bottom of the protective seat (7) is provided with a flow collector (9). The protective seat (7) is equipped with an internal conveying pipe (11). One end of the internal conveying pipe (11) is connected to the chamber where the flow collector (9) is located, and the other end is connected to a filter box (5) fixed on the lid (2) through an external conveying pipe (12). A sealing layer (10) is provided at the hinge between the protective seat (7) and the inner mounting ring (6).

2. The sealing and protective device for processing water-based industrial paint mixing tanks according to claim 1, characterized in that: The inner side of the guide sleeve (8) is provided with a split sealing mechanism, which consists of two semi-circular sealing petals (14) respectively fixed on the inner end faces of the two sets of protective seats (7). The inner ring wall of the sealing petal (14) is provided with multiple annular tooth grooves to form a non-contact labyrinth seal with the surface of the stirring shaft (4).

3. The sealing and protective device for processing water-based industrial paint mixing kettles according to claim 2, characterized in that: A sealing groove is provided on the mating end face of the two sealing flaps (14), and a sealing strip (15) is embedded in the groove.

4. The sealing and protective device for processing water-based industrial paint mixing tanks according to claim 3, characterized in that: The sealing strip (15) is made of perfluoroether rubber.

5. A sealing and protective device for processing water-based industrial paint mixing tanks according to claim 1, characterized in that: The inner wall of the guide sleeve (8) is embedded with a wear-resistant bushing made of graphite composite material, which forms a non-contact labyrinth seal with the stirring shaft (4).

6. The sealing and protective device for processing water-based industrial paint mixing kettles according to claim 1, characterized in that: One of the two sets of protective seats (7) has a horizontally retractable locking pin inside, and the other set has a locking seat that matches the locking pin at the corresponding position.

7. A sealing and protective device for processing water-based industrial paint mixing tanks according to claim 6, characterized in that: The locking pin is connected to a small hydraulic drive source located inside the protective seat (7).

8. A sealing and protective device for processing water-based industrial paint mixing tanks according to claim 1, characterized in that: One end of the drive shaft (13) extends out of the vessel body (1) and is connected to a servo motor that can drive it to rotate. A PTFE lip seal is provided between the drive shaft (13) and the vessel body (1) and the inner mounting ring (6) at the protruding part.

9. A sealing and protective device for processing water-based industrial paint mixing kettles according to claim 1, characterized in that: The sealing layer (10) is a transverse corrugated layer. Its top end is sealed to the bottom surface of the protective seat (7), and its bottom end is sealed to the inner side of the vertical section of the inner mounting ring (6). The material of the sealing layer (10) is perfluoroether rubber.

10. A sealing and protective device for processing water-based industrial paint mixing kettles according to claim 1, characterized in that: The inner conveying pipeline (11) is a double-pass pipe, with its other passage opening in the space between the protective seat (7) and the bottom surface of the lid (2). The inner conveying pipeline (11) and the outer conveying pipeline (12) are connected by a rotary joint. The filter box (5) is divided into two chambers. One chamber is equipped with a corrosion-resistant diaphragm vacuum pump connected to the external delivery pipeline (12), and the other chamber is equipped with a multi-stage filtration layer. The two chambers are connected by a branch pipe. The multi-stage filtration layer includes a stainless steel wire mesh, polyester fiber cotton and activated carbon filter cartridge arranged in sequence.

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