A split three-stage hot melt kettle

Abstract

The present invention discloses a split three-section hot melt kettle, which relates to the field of road marking equipment, including a kettle body assembly, a heating system, and a hot melt material conveying system connected by pipelines; the kettle body assembly includes a base, on which a kettle cover, an upper kettle section, a middle kettle section, and a lower kettle section are sequentially arranged from top to bottom, and the kettle cover is provided with a loading port and a feeding port, and the kettle body outer barrel and the kettle body inner barrel form a heating chamber; a discharge port connected to the kettle body inner barrel of the lower kettle is provided at the bottom of the lower kettle, and the feeding port and the discharge port are connected to the hot melt material conveying system; an oil inlet connected to the heating chamber is provided on the upper kettle body, and a stirring mechanism is coaxially arranged in the kettle body assembly, and the oil inlet and the oil outlet are connected to the heating system. The present invention can greatly improve the melting efficiency for different types of hot melt coatings, and at the same time has the advantages of automatic control of the melt temperature, sufficient fuel combustion, high combustion efficiency and compact structure.

Description

Technical Field

[0001] The present invention relates to the technical field of road marking equipment, in particular to a hot melt kettle. Background Art

[0002] In recent years, my country's economy has developed rapidly, and the construction of highways and roads at all levels has continued to develop. The market demand for road marking equipment has continued to increase. As a marking melting equipment, hot melt kettle is one of the important equipment, and the market demand is increasing.

[0003] Most of the existing hot melt kettles on the market are divided into two types: direct heating and indirect heating. Both types place the material in the barrel and heat the outer wall of the barrel, which has slow heating efficiency. Due to the progress requirements of the marking project, the marking machine must complete the corresponding marking work in a short time, which requires multiple auxiliary raw material transport vehicles. Due to the slow melting efficiency of traditional hot melt kettles, several hot melt kettles are often required to work at the same time to meet the requirements of the project progress. This results in a lot of accompanying equipment, a lot of personnel, high costs, and slow construction speed. Summary of the Invention

[0004] In order to solve the shortcomings of the existing hot melt kettle technology, the present invention provides a split three-stage hot melt kettle, which greatly improves the melting efficiency and reduces the operating equipment and labor input.

[0005] To solve the above technical problems, the present invention adopts the following technical solution: a split three-section hot melt kettle, comprising a kettle assembly connected by pipes, a heating system for heating hot melt coating, and a hot melt material conveying system for conveying melted high-temperature material into the kettle assembly;

[0006] The kettle body assembly includes a base, on which a kettle cover, an upper kettle, a middle kettle and a lower kettle are sequentially arranged from top to bottom. The kettle cover is provided with a loading port and a feeding port. The upper kettle, the middle kettle and the lower kettle all include a kettle outer barrel and a kettle inner barrel that are fitted into each other, and the kettle outer barrel and the kettle inner barrel form a heating chamber; a discharge port connected to the kettle inner barrel of the lower kettle is provided at the bottom of the lower kettle, and the feeding port and the discharging port are connected to a hot melt conveying system; an oil inlet connected to the heating chamber is provided on the upper kettle body, and a U-shaped tube for connecting the heating chamber is provided between the upper kettle and the middle kettle, and between the middle kettle and the lower kettle, and an oil outlet one connected to the heating chamber is provided on the lower kettle body; a stirring mechanism for stirring the material in the outer kettle barrel is coaxially arranged in the kettle body assembly, and the oil inlet and the oil outlet one are connected to the heating system.

[0007] In order to further optimize the present invention, the following technical solutions may be preferably used:

[0008] Preferably, the stirring mechanism includes a stirring shaft, a rotating mechanism, an upper agitator, and a lower agitator, and the stirring shaft is rotatably arranged in the middle position of the outer kettle body; the rotating mechanism is arranged on the top of the kettle cover and connected to the top of the stirring shaft, and the upper agitator and lower agitator are respectively arranged on the stirring shaft corresponding to the positions inside the upper section of the kettle body and the lower section of the kettle body.

[0009] Preferably, the upper agitator includes a stirring frame evenly distributed around the axis, and the stirring frame is provided with a fan-shaped stirring blade group and a cross-shaped stirring knife group at intervals; the lower agitator includes relatively arranged fan-shaped blades and shear plates, and the plate surfaces of the fan-shaped blades and shear plates are perpendicular to each other.

[0010] Preferably, the middle section kettle body further comprises a perforated plate, the outer barrel and inner barrel of the middle section kettle body are both arranged on the perforated plate, and heating pipes, guide plates and partitions are arranged in the outer barrel of the kettle body corresponding to the outer periphery of the inner barrel of the kettle body.

[0011] Preferably, the heating system includes a high-efficiency hot air furnace for heating the heating medium, and a burner is provided on the high-efficiency hot air furnace. The burner is connected to a fuel tank, a fuel filter, and a fuel pump in sequence through a combustion delivery pipeline. The high-efficiency hot air furnace is also provided with a heating medium delivery pipeline, and the heating medium delivery pipeline is connected to the oil inlet 2 and the oil outlet 2 of the middle kettle body and the hot melt delivery system through a one-way valve, a high-temperature gear pump, a heating medium filter, and a centrifugal pump in sequence. A temperature sensor, a thermometer, and a pressure gauge are also provided on the heating medium delivery pipeline, and the outlet end of the heating medium delivery pipeline is connected to the oil inlet of the upper kettle body.

[0012] Preferably, a second oil outlet is opened at the top of the upper kettle body, and the second oil outlet is connected to an overflow box and an oil storage tank in sequence through pipelines. The oil inlet end of the overflow box is connected to the second oil outlet of the outer kettle body, and the oil outlet end of the overflow box is connected to the oil inlet end of the oil storage tank.

[0013] Preferably, the hot melt conveying system includes a conveying pipe, one end of which is connected to the feed port and the other end is connected to the discharge port. A conveying pump is provided on the conveying pipe, and an automatic valve is provided at the inlet end of the conveying pump.

[0014] Preferably, the feed pipe and the feed pump are both provided with a heating cavity connected to the heating system, a heat preservation layer is provided outside the corresponding heating cavity on the feed pipe, and a heat preservation layer is provided on the outer kettle body.

[0015] The beneficial effects of the present invention are:

[0016] 1. This invention can be used for different types of hot-melt coatings. Utilizing the proprietary structures of the upper, middle, and lower kettle sections, the invention can rapidly melt raw materials. A hot-melt conveying system circulates a portion of the melted material back to the raw material section for mixing and stirring, shortening the heating and melting time and significantly improving melting efficiency. Furthermore, the invention features automatic melt temperature control, ensuring sufficient fuel combustion and high combustion efficiency, and is easy to disassemble and maintain. The hot-melt kettle efficiently and continuously supplies hot-melt coating to the hot-melt marking equipment, achieving high-speed marking through the control of the electronic control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a structural diagram of the kettle assembly;

[0019] Figure 3 Schematic diagram of the internal structure of the kettle assembly;

[0020] Figure 4 1. It is a structural diagram of the stirring mechanism assembly;

[0021] Figure 5 It is a structural diagram of the heating system;

[0022] Figure 6 It is a structural diagram of the hot melt conveying system;

[0023] Figure 7 Schematic diagram of the internal structure of the middle kettle.

[0024] Among them, 1-kettle body assembly, 2-stirring mechanism, 3-heating system, 4-hot melt conveying system, 5-kettle cover assembly, 6-upper kettle body, 7-middle kettle body, 8-lower kettle body, 9-rotating mechanism, 10-bearing seat, 11-upper agitator, 12-lower agitator, 13-fuel tank, 14-fuel filter, 15-fuel pump, 16-high-efficiency heating furnace, 17-one-way valve, 18-high-temperature gear pump, 19-heating medium filter, 20-centrifugal pump, 21-temperature sensor, 22-temperature gauge, 23-pressure gauge, 24-overflow tank, 25-oil storage tank, 26-automatic valve, 27- Feeding pump, 28-manual valve, 29-feeding pipe, 30-feeding port, 31-kettle cover bottom plate, 32-fan-shaped blades, 33-shear plate, 34-fan-shaped stirring blade group, 35-cross-shaped stirring knife group, 36-oil outlet 2, 37-upper kettle body outer barrel, 38-upper kettle body barrel, 39-oil inlet, 40-oil outlet 1, 41-U-shaped tube, 42-base, 43-lower kettle body barrel, 44-lower kettle body barrel, 45-middle kettle body barrel, 46-orifice plate, 47-heating tube, 48-guide plate, 49-partition, 50-middle kettle outer barrel, 51-kettle body temperature detector, 52-feeding port. DETAILED DESCRIPTION

[0025] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0027] like Figure 1-7 As shown, a split three-stage hot melt kettle includes a kettle assembly 1 connected by pipes, a heating system 3 for heating hot melt coating, and a hot melt material conveying system 4 for conveying melted high-temperature material into the kettle assembly;

[0028] The kettle body assembly includes a base 42, on which the upper kettle body 6, the middle kettle body 7, and the lower kettle body 8 are installed from top to bottom through flange connections. The top of the upper kettle body is installed with a kettle cover assembly 5 through a connecting flange. The kettle cover assembly includes a kettle cover bottom plate 31, and the kettle cover is provided with a loading port 52 and a feeding port 30. The loading port is used to put raw materials, and the feeding port 30 is used to put hot melt materials. The upper kettle body 6 includes an upper kettle body barrel 37 and an upper kettle body barrel 38 that are mutually set. The middle kettle body includes a middle kettle body barrel 50 and a middle kettle body barrel 38 that are mutually set. The kettle body has an inner barrel 45, and the lower kettle body includes a lower kettle body barrel 43 and a lower kettle body outer barrel 44, which are nested together. The middle kettle body also includes a perforated plate 46. The middle kettle body outer barrel and the middle kettle body inner barrel are both mounted on the perforated plate. A heating pipe 47, a guide plate 48, and a partition 49 are mounted inside the middle kettle body outer barrel at positions corresponding to the outer periphery of the middle kettle body inner barrel. The heating pipe is welded between the upper and lower plates to heat the hot melt. The heating pipes are used to transport the heating medium. There are guide plates between the heating pipes for diverting the heating medium. The partition also serves to divert the heating medium. Under the guidance of the guide plate, the heating medium efficiently heats the material pipe, allowing the hot melt to obtain more heat during the process of entering and exiting the material pipe, thereby allowing the hot melt to reach a hot melt state suitable for operation. The upper kettle body barrel and the upper kettle body barrel, the middle kettle body barrel and the middle kettle body barrel, the lower kettle body barrel and the lower kettle body barrel respectively form a heating chamber; the upper kettle body 6, the middle kettle body 7 and the lower kettle body 8 are all equipped with temperature sensors 51; a stirring mechanism for stirring the material in the outer kettle body barrel is coaxially installed in the kettle body assembly, the stirring mechanism includes a stirring shaft, a rotating rotary mechanism, an upper stirrer and a lower stirrer, and the stirring shaft is rotatably installed in the middle position of the outer kettle body; the rotating rotary mechanism 9 is installed on the top of the kettle cover assembly 10 through the bearing seat 10 and is connected to the top of the stirring shaft, the upper stirrer 11 and the lower stirrer 12 are respectively installed on the stirring shaft corresponding to the positions in the upper kettle body and the lower kettle body; the upper stirrer includes a stirring frame evenly installed around the axis, and the stirring frame is installed with fan-shaped stirring blade groups 34 and cross-shaped stirring knife groups 35 at intervals; the lower stirrer includes relatively installed fans The fan-shaped blades 32 and the shear plates 33 are perpendicular to each other. The stirring blades with a specially designed structure can ensure that the materials in the kettle are stirred quickly. The fan-shaped blades are more conducive to evenly stirring the hot material and the raw material. The cross-shaped stirring knife group is more conducive to piercing the EVA bag of the hot melt while stirring, shortening the melting time of the coating and improving the melting efficiency. The fan-shaped blades can fully stir the hot melt in the core of the lower kettle, and the shear plates can fully stir the hot melt at the edge of the lower kettle. U-shaped tubes 41 for connecting two adjacent heating chambers are connected between the upper kettle body and the middle kettle body, and between the middle kettle body and the lower kettle body. A kettle body temperature detector 51 for detecting the temperature in the kettle is installed on the upper kettle body, the middle kettle body and the lower kettle body. The oil inlet 39 and the oil outlet 40 are connected to the heating system, and the feed port and the discharge port are connected to the hot melt conveying system.

[0029] The heating system includes a high-efficiency hot air furnace for heating the heating medium. A burner is installed on the high-efficiency hot air furnace. The burner is connected to a fuel tank 13, a fuel filter 14, a fuel pump 15, a one-way valve 17, a high-temperature gear pump 18, a heating medium filter 19, a centrifugal pump 20, a temperature sensor 21, a thermometer 22, a pressure gauge 23, an overflow tank 24, an oil storage tank 25 and a piping system in sequence through a combustion delivery pipeline. The heating system is used to heat hot melt paint. The fuel in the fuel tank 13 passes through the fuel filter 14, the fuel pump 15, the pipeline and fasteners to the burner of the high-efficiency heating furnace 16. The burner ignites the fuel and sprays flame to the high-efficiency heating furnace 16. The high-efficiency heating furnace 16 heats the heating medium. The materials in the hot melt kettle body 1, the material delivery pipe and the marking device are heated through the one-way valve 17, the high-temperature gear pump 18, the heating medium filter 19, the centrifugal pump 20 and the piping system. The heating medium enters the overflow tank 24 through the pipeline and fasteners at the oil outlet 2 36 position of the upper kettle body in the middle of the kettle body assembly. When the medium in the overflow tank 24 overflows, the heating medium enters the oil storage tank 25 through the pipeline and fasteners. The temperature sensor 21, the thermometer 22 and the pressure gauge 23 play the role of detecting and transmitting control signals in the system. The fuel is stored in the fuel tank 13, and the heating medium is stored in the pipeline and cavity of the entire heating system. The heating pipeline is used to connect the high-efficiency heating furnace 16, the kettle body assembly 1 and the heating chamber of the hot melt material conveying system 4.

[0030] The hot melt conveying system 4 includes an automatic valve 26, a feed pump 27, a manual valve 28, and a feed pipe 29. The hot melt circulation conveying system 4 conveys a portion of the melted high-temperature material to the upper kettle body 6 through the automatic valve 26, the feed pump 27, the feed pipe 29, the manual valve 28, and the feed pipe 29. The melted high-temperature material is used to heat the raw material, accelerate the melting rate of the raw material, and improve the heating efficiency of the hot melt kettle. When the marking device is operating, the automatic valve 26 is opened and the feed pump 27 is used to convey another portion of the melted high-temperature material through the automatic valve to the marking device feed pipe 29. The feed pump 27 is provided with a heating layer, and the feed pipe 29 is provided with a heating layer and a heat-insulating layer. The inlet of the automatic valve 26 is connected to the discharge port of the lower kettle 8 via fasteners, the inlet of the feed pump 27 is connected to the outlet of the automatic valve 26 via fasteners, the lower inlet of the feed pipe 29 is connected to the outlet of the feed pump 27 via fasteners, the inlet of the automatic valve 26 is connected to the lower outlet of the feed pipe 29 via fasteners, the inlet of the manual valve 28 is connected to the upper outlet of the feed pipe 29 via fasteners, the outlet of the manual valve 28 is connected to the inlet of the feed pipe 29 via fasteners, and the outlet of the feed pipe 29 is connected to the feed inlet flange on the kettle cover assembly 5 via fasteners. Furthermore, heating chambers connected to the heating system are installed on the feed pipe and the feed pump, an insulation layer is installed on the feed pipe corresponding to the outside of the heating chamber, and an insulation layer is installed on the outer kettle body. The design of the insulation layer and the heating chamber can ensure that the hot melt maintains a constant temperature in the delivery pipeline, reducing heat loss.

[0031] The working principle of the present invention is: the heating medium is heated by the heating mechanism, and the barrel of the hot melt kettle is heated by the heating medium. The upper, middle and lower kettle bodies are connected in series in sequence, and raw materials are added to the feeding port of the upper kettle according to the set feeding amount. The raw materials enter the upper kettle and are heated by the middle kettle body. After entering the lower kettle, the raw materials become clinker that can be used for operation. The clinker in the lower kettle passes through the feeding system, is used for marking operation all the way, and is circulated to the upper kettle all the way to heat the newly added raw materials in the upper kettle. In this cycle, clinker that can be used for construction operation can be continuously generated, thereby ensuring that the marking operation can be carried out continuously.

[0032] This invention can be used with different types of hot-melt coatings, utilizing a proprietary structure to rapidly melt the raw material. A hot-melt conveying system circulates a portion of the melted material back to the raw material section for mixing and stirring, shortening the heating and melting time and significantly improving melting efficiency. It also features automatic melt temperature control, ensuring full fuel combustion and high combustion efficiency, while also facilitating easy assembly and maintenance. The hot-melt kettle efficiently and continuously supplies hot-melt coating to the hot-melt marking equipment, achieving high-speed marking through the control of an electronic control system.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A split three-stage hot melt kettle comprising a kettle assembly connected by pipes, a heating system for heating hot melt coating, and a hot melt material delivery system for delivering molten high-temperature material into the kettle assembly; characterized in that: The kettle body assembly includes a base, on which a kettle cover, an upper kettle, a middle kettle and a lower kettle are arranged in sequence from top to bottom. The kettle cover is provided with a loading port and a feeding port. The upper kettle, the middle kettle and the lower kettle all include a kettle body outer barrel and a kettle body inner barrel which are fitted together. The kettle body outer barrel and the kettle body inner barrel form a heating chamber. A discharge port connected to the kettle body inner barrel of the lower kettle is provided at the bottom of the lower kettle, and the feeding port and the discharge port are connected to the hot melt conveying system. An oil inlet communicating with the heating chamber is provided on the upper kettle, and a U-shaped opening for communicating with the heating chamber is provided between the upper kettle and the middle kettle, and between the middle kettle and the lower kettle. The lower section of the kettle is provided with an oil outlet connected to the heating chamber. A stirring mechanism for stirring the barrel material in the kettle body is coaxially provided in the kettle body assembly. The oil inlet and the oil outlet are connected to the heating system. The raw material enters the upper section of the hot melt kettle and is heated by the middle section of the kettle. After entering the lower section of the kettle, the raw material becomes clinker that can be used for operation. The clinker in the lower section of the kettle passes through the hot melt material conveying system, one way is used for marking operation, and the other way is circulated to the upper section of the kettle for heating the raw material in the upper section of the kettle. In this cycle, clinker that can be used for construction operation can be continuously generated. The middle section kettle also includes a perforated plate. The outer barrel and the inner barrel of the kettle of the middle section kettle are both arranged on the perforated plate. A heating pipe and a guide plate are arranged in the outer barrel of the kettle corresponding to the outer periphery of the inner barrel of the kettle. A partition for guiding the heating medium is arranged on the inner wall of the outer barrel of the middle section kettle. The heating pipe is welded between the upper and lower plates to heat the hot melt. The heating medium is transported between the heating pipes. The guide plate for guiding the heating medium is arranged between the heating pipes. Under the drainage effect of the guide plate, the heating medium efficiently heats the heating pipe, so that the hot melt can obtain more heat in the process of entering and exiting the heating pipe, thereby making the hot melt reach an operable hot melt state; The heating system includes a high-efficiency hot blast furnace for heating a heating medium, the high-efficiency hot blast furnace is provided with a burner, the burner is sequentially connected to a fuel tank, a fuel filter, and a fuel pump through a combustion delivery pipeline, the high-efficiency hot blast furnace is also provided with a heating medium delivery pipeline, the heating medium delivery pipeline is sequentially connected to the second oil inlet and the second oil outlet of the middle section kettle and the hot melt delivery system through a one-way valve, a high-temperature gear pump, a heating medium filter, and a centrifugal pump, the heating medium delivery pipeline is also provided with a temperature sensor, a temperature gauge, and a pressure gauge, and the outlet end of the heating medium delivery pipeline is connected to the oil inlet of the upper section kettle; The stirring mechanism includes a stirring shaft, a rotating mechanism, an upper stirrer, and a lower stirrer. The stirring shaft is rotatably arranged in the middle position inside the outer barrel of the kettle body; the rotating mechanism is arranged on the top of the kettle cover and connected to the top of the stirring shaft. The upper stirrer and the lower stirrer are respectively arranged on the stirring shaft corresponding to the upper and lower positions in the kettle; The upper stirrer has a cross-shaped stirring blade set for piercing the EVA packaging bag; The lower agitator has fan-shaped blades and shear plates that are arranged perpendicular to each other.

2. The split three-stage hot melt kettle according to claim 1, characterized in that: An oil outlet 2 is provided at the top of the upper kettle, and the oil outlet 2 is connected to an overflow box and an oil storage tank in sequence through pipelines. The oil inlet end of the overflow box is connected to the oil outlet 2 of the outer barrel of the kettle body, and the oil outlet end of the overflow box is connected to the oil inlet end of the oil storage tank.

3. The split three-stage hot melt kettle according to claim 1, characterized in that: The hot melt conveying system includes a conveying pipe, one end of which is connected to the feed port and the other end is connected to the discharge port. A conveying pump is provided on the conveying pipe, and an automatic valve is provided at the inlet end of the conveying pump.

4. The split three-stage hot melt kettle according to claim 3, characterized in that: The feeding pipe and the feeding pump are both provided with a heating cavity connected to the heating system. The feeding pipe is provided with a heat preservation layer outside the corresponding heating cavity, and the outer barrel of the kettle is provided with a heat preservation layer.

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