Cooling device for a pug mill

Abstract

The utility model relates to a mud refining machine technical field discloses a cooling device for mud refining machine, the first cooling cavity, second cooling cavity are equipped with in proper order to the material conveying cylinder wall, the first cooling cavity is close to the vacuum chamber screen area, the vertical stirring cylinder wall is equipped with third cooling cavity, the forming discharge cylinder wall is segmented and is equipped with fourth cooling cavity and fifth cooling cavity, each cooling cavity is connected cooling water inlet joint and cooling water outlet joint respectively, all cooling water inlet joint is connected to the water outlet end of cold water machine through the flow divider and pipeline unification, all cooling water outlet joint is backflowed to the water inlet end of cold water machine through the flow combiner and pipeline unification, forms circulating water cooling system for carrying out segmented cooling to the mud in the screen nearby, material conveying cylinder, vertical stirring cylinder and forming discharge cylinder, to reduce the temperature rise of mud in the mud refining process. The utility model can carry out the whole process cooling to the mud, and carries out forced heat dissipation to the twisting knife main shaft and bearing simultaneously, to reduce the mud temperature.

Description

Technical Field

[0001] This utility model relates to the field of plywood refining machine technology, and in particular to a cooling device for plywood refining machines. Background Technology

[0002] In the processing and production of clay materials such as ceramics and bricks, the clay mixing machine is the core equipment for mixing, kneading, vacuum treatment, and extrusion molding of clay materials. During the mixing, extrusion, and sieving processes, the clay generates a large amount of heat due to shearing and friction, causing the clay temperature to rise. This can lead to problems such as the clay becoming soft, sticky, and less uniform, affecting the quality of subsequent molding. At the same time, the auger shaft of the clay mixing machine bears a large axial and radial force during operation. Its thrust bearing is prone to localized heat accumulation and overheating due to heavy load and poor heat dissipation. This not only causes accelerated bearing wear and shortens its service life, but can also lead to malfunctions such as jamming and abnormal noise. Furthermore, the heat generated by the thrust bearing is transferred to the main shaft, and the main shaft transfers it to the clay, further aggravating the clay temperature rise.

[0003] Existing plowing machines mostly rely on natural heat dissipation or localized simple water cooling, which has limited cooling effect and makes it difficult to achieve efficient cooling of the plow material, main shaft, and bearings simultaneously. Therefore, developing a plowing machine cooling device that can cool the plow material throughout the entire process and simultaneously dissipate heat from the main shaft and bearings is of significant practical importance. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a cooling device for a plowing machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: A cooling device for a pumice machine is provided, which includes a base, a vacuum chamber located at the top of the base, a forming discharge cylinder connected to one side of the lower part of the vacuum chamber, and a conveying cylinder connected to the other side of the upper part of the vacuum chamber. A screen is provided at the connection between the vacuum chamber and the conveying cylinder. The conveying cylinder is connected to a vertical stirring cylinder, the bottom of which is fixed to the base by a support. The conveying cylinder has a first cooling chamber and a second cooling chamber arranged sequentially on its wall. The first cooling chamber is located near the screen area of ​​the vacuum chamber. The vertical stirring cylinder... The wall is provided with a third cooling chamber; the wall of the forming discharge cylinder is divided into a fourth cooling chamber and a fifth cooling chamber; each cooling chamber is connected to a cooling water inlet connector and a cooling water outlet connector respectively; all cooling water inlet connectors are connected to the outlet of the chiller through a distributor and pipelines; all cooling water outlet connectors are returned to the inlet of the chiller through a confluence connector and pipelines, forming a circulating water cooling system, which is used to cool the mud near the screen, in the conveying cylinder, in the vertical mixing cylinder and in the forming discharge cylinder in stages, so as to reduce the temperature rise of the mud during the mud refining process.

[0006] Furthermore, the vertical stirring drum is equipped with a parallel stirring long shaft and a stirring short shaft. The stirring long shaft passes through the conveying cylinder and extends into the vacuum chamber, where it is rotatably connected to the outer wall of the vacuum chamber. Stirring blades are evenly distributed on the stirring long shaft and the stirring short shaft. A driving wheel and a driven wheel are respectively provided at the outer ends of the stirring long shaft and the stirring short shaft. The driving wheel and the driven wheel are connected by a transmission belt. The stirring long shaft is connected to a first reducer and a stirring drive motor.

[0007] Furthermore, a auger spindle is installed inside the forming discharge cylinder. The auger spindle passes through the vacuum chamber and the support in sequence, and is connected to the second reducer and the spindle drive motor.

[0008] Furthermore, the outer wall of the vacuum chamber is provided with an installation cavity, and a thrust bearing sleeved on the outside of the auger spindle is provided in the installation cavity. The installation cavity is connected to one or more oil inlets and one or more oil outlets. The oil inlets are connected to an oil cooler via an oil pump, and the oil outlets return to the oil cooler.

[0009] Furthermore, the oil cooler includes an oil tank, inside which is a cooling water coil. The cutter spindle passes through the top of the oil tank of the oil cooler, and the cooling water coil is located below the cutter spindle. The inlet and outlet of the cooling water coil are respectively connected to the chiller.

[0010] Furthermore, the mounting cavity is also provided with a thrust plate, a movable bearing plate, and an end cap. The thrust plate, thrust bearing, movable bearing plate, and end cap are arranged sequentially from the inside to the outside of the mounting cavity. The end cap is fixed to the opening of the mounting cavity and has multiple adjusting screws along its circumference that abut against the movable bearing plate.

[0011] Furthermore, the circulating water cooling system is also equipped with a filter device, which is installed at the outlet of the chiller to prevent impurities from entering the cooling chamber. Beneficial effects

[0012] Compared with the prior art, the present invention has at least the following advantages: 1. This utility model utilizes a combination of independent cooling chambers in multiple sections on the ply mill and circulating water cooling to precisely cool the ply material in segments throughout the entire process of mixing, conveying, sieving, and extrusion molding. This significantly reduces the temperature rise of the ply material caused by shear friction, ensures the hardness and uniformity of the ply material, and improves the subsequent molding quality.

[0013] 2. This utility model uses a chiller to supply water to each independent cooling chamber and oil chiller. The water is distributed by a distributor and merged by a confluencer, so as to realize the recycling of cooling water, resulting in high cooling efficiency and low energy consumption.

[0014] 3. This utility model uses adjusting screws circumferentially set on the end cover to balance the force on the movable bearing plate, eliminate the phenomenon of one-sided force on the bearing, reduce frictional heat generation, and improve the smoothness of bearing operation.

[0015] 4. This utility model adopts an independent cold oil circulation system, which first cools the lubricating oil and then forces it into the bearing mounting cavity to achieve continuous cooling and lubrication of the thrust bearing, further reducing the temperature of the cutter spindle and thrust bearing, and extending the service life of the bearing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the left-side structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the right-side structure of this utility model.

[0018] Figure 3 This is a cross-sectional view of the vertical stirring drum of this utility model.

[0019] Figure 4 This is a cross-sectional view of the molding discharge cylinder position of this utility model.

[0020] Figure 5 This utility model Figure 4 A partially enlarged structural diagram.

[0021] Figure 6 This is a schematic diagram of the structure of the oil cooler of this utility model.

[0022] Figure 7 This is a schematic diagram showing the connection between the cooling chambers and cooling water coils of this utility model and the chiller through a distributor and a combiner.

[0023] The diagram is labeled as follows: 1-Base; 2-Vacuum chamber; 3-Forming discharge cylinder; 4-Feeding cylinder; 5-Screen; 6-Vertical mixing cylinder; 7-Support; 8-Long mixing shaft; 9-Short mixing shaft; 10-Driving wheel; 11-Driven wheel; 12-First reducer; 13-First pulley; 14-Fixed frame; 15-Mixing drive motor; 16-Second pulley; 17-Auger main shaft; 18-Mixing blade; 19-Auger; 20-Second reducer; 21-Third pulley; 22-Main shaft drive motor; 23-Fourth pulley; 24-First cooling chamber; 25-Second cooling chamber; 26-Third cooling chamber; 27-Fourth cooling chamber; 28-Fifth cooling chamber; 29-Mounting chamber; 30-Thrust plate; 31-Thrust bearing; 32-Modible load-bearing plate; 33-End cover; 330-Adjusting screw hole; 34-Oil inlet; 35-Oil outlet; 36-Oil pump; 37-Oil cooler; 370-Oil tank; 371-Cooling water coil; 372-Water inlet connector; 373-Water outlet connector; 38-Oil distributor. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, a detailed description is provided below in conjunction with the accompanying drawings and specific embodiments. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] See Figures 1-6 This embodiment provides a cooling device for a pumice machine, which is applied to the pumice machine. The pumice machine includes a base 1, a vacuum chamber 2 set on the top of the base 1, a forming discharge cylinder 3 connected to the lower output end of the vacuum chamber 2, and a conveying cylinder 4 connected to the upper input end of the vacuum chamber 2. A screen 5 is provided at the connection between the vacuum chamber 2 and the conveying cylinder 4. The conveying cylinder 4 is connected to a vertical stirring cylinder 6. The bottom of the vertical stirring cylinder 6 is fixed to the base 1 by a support 7.

[0028] A parallel stirring long shaft 8 and stirring short shaft 9 are rotatably mounted inside a vertical stirring drum 6. The stirring long shaft 8 passes through the conveying cylinder 4 and extends into the vacuum chamber 2, where it is rotatably connected to the outer wall of the vacuum chamber 2. Multiple stirring blades are evenly distributed on the stirring long shaft 8 and stirring short shaft 9, with the blades arranged alternately. The stirring blades of the stirring long shaft 8 are distributed between the conveying cylinder 4 and the vertical stirring drum 6. The outer ends of the stirring long shaft 8 and stirring short shaft 9 extend to the outside of the vertical stirring drum 6 and are respectively fixed with a driving wheel 10 and a driven wheel 11. The driving wheel 10 and the driven wheel 11 are connected by a transmission belt. The outer end of the stirring long shaft 8 is connected to a first reducer 12. A first pulley 13 is fixed at the input end of the first reducer 12. The bottom of the first reducer 12 is mounted on the base 1 via a fixing bracket 14. A stirring drive motor 15 is provided on the other side of the top of the fixing bracket 14. A second pulley 16 is fixed at the output end of the stirring drive motor 15. The first pulley 13 and the second pulley 16 are connected by a belt drive.

[0029] The forming discharge cylinder 3 is equipped with a coaxially arranged auger shaft 17. The auger shaft 17 has stirring blades 18 in the section of the vacuum chamber 2, and an auger 19 is installed in the forming discharge cylinder 3. The auger shaft 17 passes through the vacuum chamber 2, the support 7, and the fixing frame 14 in sequence, and is connected to the second reducer 20 installed on the base 1. The input end of the second reducer 20 is provided with a third pulley 21, and the base 1 is also provided with a main shaft drive motor 22. The output end of the main shaft drive motor 22 is provided with a fourth pulley 23. The third pulley 21 and the fourth pulley 23 are connected by belt drive.

[0030] A section of the cylinder wall near the screen 5 of the conveying cylinder 4 is designated as the first cooling chamber 24, and a second cooling chamber 25 is provided on the cylinder wall of the conveying cylinder 4 near the first cooling chamber 24. The vertical mixing cylinder 6 has a third cooling chamber 26 on its cylinder wall. The molding discharge cylinder 3 has a fourth cooling chamber 27 and a fifth cooling chamber 28 in sections on its cylinder wall. Each cooling chamber is connected to a cooling water inlet connector and a cooling water outlet connector. All cooling water inlet connectors are connected to the outlet of an external chiller through a distributor and pipelines. All cooling water outlet connectors are returned to the inlet of the chiller through a confluence connector and pipelines, forming a circulating water cooling system. This system is used to cool the mud near the screen 5, in the conveying cylinder 4, the vertical mixing cylinder 6, and the molding discharge cylinder 3 in sections, so as to reduce the temperature rise of the mud during the mud-making process.

[0031] The auger spindle 17 is rotatably connected to the vacuum chamber 2 and the support 7 via bearings. The outer wall of the vacuum chamber has a mounting cavity 29, inside which, from the inside out, are arranged a thrust plate 30, a thrust bearing 31, a movable support plate 32, and an end cover 33. The end cover 33 is locked to the opening of the mounting cavity 29 by screws. The auger spindle 17 passes through the thrust plate 30, the thrust bearing 31, the movable support plate 32, and the end cover 33 in sequence. The thrust bearing 31 is sleeved on the outside of the auger spindle 17. The end cover 33 has multiple adjusting screw holes 330 along its circumference. Adjusting screws are threaded into the adjusting screw holes 330, and the ends of the adjusting screws abut against the movable support plate. The circumferentially distributed adjusting screws can adjust the force at various points on the movable support plate 32, eliminating unilateral unbalanced load on the thrust bearing 31, making the thrust bearing 31 operate more smoothly, and reducing bearing temperature rise. It should be noted that an O-ring is fitted on the outside of the adjusting screw. The O-ring is pressed tightly against the outer end face of the end cover 33, which not only ensures that the adjusting screw can be rotated circumferentially for force adjustment, but also achieves a seal at the thread position to prevent the lubricating oil in the mounting cavity 29 from leaking out, and at the same time prevents external dust from entering the cavity.

[0032] The mounting cavity 29 has two oil inlets 34 on one side and two oil outlets 35 on the other side. The oil inlets 34 are connected to an oil cooler 37 via an oil pump 36, and the oil outlets 35 return to the oil cooler 37. Specifically, the oil outlet of the oil cooler 37 is connected to the oil pump 36 via an oil pipe. The oil pump 36 supplies oil to the two oil inlets 34 via an oil distributor 38 and an oil pipe. The oil outlets 35 return to the oil inlet of the oil cooler 37 via an oil pipe, forming a circulating cooling lubricating oil circuit. A one-way valve is installed on the oil inlet pipe of the mounting cavity 29 to prevent backflow of lubricating oil when the machine stops, thus avoiding oil shortage in the mounting cavity 29.

[0033] The oil cooler 37 includes an oil tank 370, inside which is a cooling water coil 371. The auger spindle 17 passes through the top of the oil tank 370, and the oil tank 370 directly cools the auger spindle 17 through its internal cooling oil. The cooling water coil 371 is located below the auger spindle 17. The inlet and outlet ends of the cooling water coil 371 are respectively connected to an inlet connector 372 and an outlet connector 373 located on the side wall of the oil tank 370. The inlet connector 372 and the outlet connector 373 are connected to the chiller via water pipes. The cooling water circulating through the cooling water coil 371 cools the lubricating oil in the oil tank 370. The cooled lubricating oil is then pumped into the mounting cavity 29 by the oil pump 36 to provide forced cooling and lubrication for the thrust bearing 31. At the same time, it assists in cooling the auger spindle 17, further reducing the operating temperature of the auger spindle 17 and the bearing. This reduces the temperature rise of the auger spindle 17 and the bearing, which can lead to a rise in the temperature of the mud material and prevent the mud material from affecting production quality.

[0034] It should be noted that the chiller described in this utility model is a mature industrial refrigeration device in the prior art. It typically includes a compressor, condenser, evaporator, expansion valve, and control system, and its basic function is to provide constant-temperature low-temperature cooling water for external circulation. In this utility model, as... Figure 7 As shown, the chiller serves as an external cold source for cooling water. Its outlet is connected to the main inlet of a distributor, which has six independent outlets. These outlets are connected via six water supply pipes to the cooling water inlet connectors of the first, second, third, fourth, and fifth cooling chambers, as well as the inlet connectors of the cooling water coils. Correspondingly, the cooling water outlet connectors of the first, second, third, fourth, and fifth cooling chambers, and the outlet connectors of the cooling water coils, are connected via six return water pipes to the corresponding inlets of a confluencer. The main outlet of the confluencer is connected to the inlet of the chiller via a main return water pipe, thus forming a complete closed-loop circulation circuit. Preferably, a regulating valve (not shown in the figure) can be installed on each water supply pipe to independently regulate the cooling water flow rate of each cooling chamber and cooling water coil 371. The chiller supplies cooling water to the multi-stage cooling chambers and cooling water coils of this invention. Its inlet end recovers the cooling water that has absorbed heat flowing out from each cooling chamber and cooling water coil through a confluencer and pipeline. The function of the chiller is to continuously maintain the cooling water within a set low-temperature operating range, thereby ensuring the cooling efficiency of the entire circulating water cooling system and lubrication circuit.

[0035] The circulating water cooling system is also equipped with a filter device, which is installed at the outlet of the chiller to prevent impurities from entering the cooling chambers.

[0036] Working principle: When the equipment is working, the stirring drive motor 15 drives the long stirring shaft 8 and the short stirring shaft 9 to rotate, which fully stirs and kneads the mud entering the vertical stirring drum 6. The mud enters the vacuum chamber 2 through the conveying drum 4 and the screen 5, and is then extruded from the forming discharge drum 3 by the auger main shaft 17. The chiller provides circulating cooling water, which is distributed to the first cooling chamber 24 and the second cooling chamber 25 of the conveying drum 4, the third cooling chamber 26 of the vertical stirring drum 6, and the fourth cooling chamber 27 and the fifth cooling chamber 28 of the forming discharge drum. This provides segmented cooling for the entire process of mud stirring, conveying, screening, and extrusion molding. The cooled water that has absorbed heat is returned to the chiller through the confluencer, forming a closed-loop circulating water cooling system to continuously reduce the temperature rise of the mud.

[0037] Meanwhile, the cutter shaft 17 experiences significant axial force during operation, causing frictional heat to easily generate in the thrust bearing 31. This heat is conducted through the cutter shaft 17, exacerbating the temperature rise of the mud. The circulating cooling water from the chiller is also sent to the oil cooler 37 via a distributor, and then returned to the chiller via a confluencer to cool the lubricating oil in the oil cooler 37. The lubricating oil in the oil cooler 37, after being pre-cooled by the cooling water coil 371, is pumped by the oil pump 36 through the oil inlet 34 into the mounting cavity 29 outside the vacuum chamber 2 to forcibly cool and lubricate the thrust bearing 31. The lubricating oil, having absorbed heat, returns to the oil cooler 37 through the oil outlet 35 for repeated cooling and reuse. Furthermore, the oil tank 370 of the oil cooler 37 encloses the cutter shaft 17, directly cooling it with low-temperature lubricating oil, reducing heat transfer from the cutter shaft 17 to the mud.

[0038] The movable load-bearing plate 32 inside the mounting cavity 29 cooperates with the adjusting screw of the end cover 33 to adjust the force distribution in the circumference, avoid the thrust bearing 31 from being unbalanced or having excessive force at a single point, further reduce bearing friction and heat generation, and make the auger spindle 17 run more smoothly.

[0039] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cooling device for a plowing machine, applied to a plowing machine, characterized in that, The plowing machine includes a base, a vacuum chamber located at the top of the base, a forming discharge cylinder connected to one side of the lower part of the vacuum chamber, and a conveying cylinder connected to the other side of the upper part of the vacuum chamber. A screen is provided at the connection between the vacuum chamber and the conveying cylinder. The conveying cylinder is connected to a vertical mixing cylinder, and the bottom of the vertical mixing cylinder is fixed to the base by a support. The conveying cylinder wall is provided with a first cooling chamber and a second cooling chamber in sequence. The first cooling chamber is close to the screen area of ​​the vacuum chamber. The vertical mixing cylinder wall is provided with a third cooling chamber. The forming discharge cylinder wall is provided with a fourth cooling chamber and a fifth cooling chamber in sections. Each cooling chamber is connected to a cooling water inlet connector and a cooling water outlet connector. All cooling water inlet connectors are connected to the outlet of the chiller through a distributor and pipelines. All cooling water outlet connectors are returned to the inlet of the chiller through a confluence connector and pipelines, forming a circulating water cooling system for segmented cooling of the plow material near the screen, in the conveying cylinder, in the vertical mixing cylinder, and in the forming discharge cylinder, so as to reduce the temperature rise of the plow material during the plowing process.

2. The cooling device for a plywood machine according to claim 1, characterized in that, The vertical mixing drum is equipped with a parallel long mixing shaft and a short mixing shaft. The long mixing shaft passes through the conveying cylinder and extends into the vacuum chamber, where it is rotatably connected to the outer wall of the vacuum chamber. The long mixing shaft and the short mixing shaft are evenly distributed with staggered mixing blades. The outer ends of the long mixing shaft and the short mixing shaft are respectively provided with a driving wheel and a driven wheel, which are connected by a transmission belt. The long mixing shaft is connected to a first reducer and a mixing drive motor.

3. A cooling device for a plywood machine according to claim 1, characterized in that, The forming discharge cylinder is equipped with a auger spindle, which passes through the vacuum chamber and the support in sequence, and is connected to the second reducer and the spindle drive motor.

4. A cooling device for a plywood machine according to claim 3, characterized in that, The outer wall of the vacuum chamber is provided with an installation cavity, and a thrust bearing is provided in the installation cavity and sleeved on the outside of the auger spindle. The installation cavity is connected to one or more oil inlets and one or more oil outlets. The oil inlets are connected to an oil cooler via an oil pump, and the oil outlets return to the oil cooler.

5. A cooling device for a plywood machine according to claim 4, characterized in that, The oil cooler includes an oil tank, inside which is a cooling water coil. The cutter spindle passes through the top of the oil tank of the oil cooler, and the cooling water coil is located below the cutter spindle. The inlet and outlet of the cooling water coil are respectively connected to the chiller.

6. A cooling device for a plywood machine according to claim 4, characterized in that, The mounting cavity is also equipped with a thrust plate, a movable bearing plate, and an end cap. The thrust plate, thrust bearing, movable bearing plate, and end cap are arranged sequentially from the inside to the outside of the mounting cavity. The end cap is fixed to the opening of the mounting cavity and has multiple adjusting screws along its circumference that abut against the movable bearing plate.

7. A cooling device for a plywood machine according to claim 1, characterized in that, The circulating water cooling system is also equipped with a filter device, which is installed at the outlet of the chiller to prevent impurities from entering the cooling chamber.

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