Energy-saving high-pressure pump for pressurizing carbon dioxide

Abstract

The invention relates to the technical field of high-pressure pumps, and discloses an energy-saving high-pressure pump for pressurizing carbon dioxide, which comprises a driving motor and a plunger pump, and the plunger pump comprises a crankcase, a pump box and a plurality of plungers. An input shaft of the crankcase is fixedly connected with a belt wheel, an output shaft of the driving motor is in transmission with the belt wheel, and the belt wheel is provided with cooling fan blades. The tail portion of the plunger is driven by the crankshaft to slide, the end portion reciprocates in the pump box, the middle section slides in a clearance between the crankshaft box and the pump box, and an inter-box assembly is arranged between the two boxes. The inter-box assembly comprises an upper shunting seat and a lower shunting seat, two sides of the upper shunting seat are provided with inner inclined edge drainage plates, the middle of the lower shunting seat is provided with an outer inclined middle drainage plate, and the back is provided with a rear vertical seat. And an oil collecting groove is formed in the bottom of the rear vertical seat so as to collect oil dirt discharged by the oil guide channel. The device is suitable for a high-temperature carbon dioxide pressurization scene in tobacco extraction, stable, efficient and energy-saving operation of the pump is guaranteed, and energy consumption, maintenance complexity and cost are reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of high-pressure pumps, in particular to an energy-saving high-pressure pump for pressurizing carbon dioxide. BACKGROUND

[0002] In the tobacco processing field, supercritical carbon dioxide extraction technology is a key process for realizing separation of effective components of tobacco and improving the quality of tobacco. Through placing carbon dioxide in a supercritical state, the technology extracts specific components in tobacco by using the excellent dissolving performance of carbon dioxide. After extraction, the recovered carbon dioxide needs to be pressurized and then discharged into a carbon dioxide storage tank for recycling. The energy-saving high-pressure pump is a core device in the recovery and pressurization process. The use of the energy-saving high-pressure pump can meet the pressurization requirements of carbon dioxide, optimize the driving structure, reduce the operating energy consumption, meet the requirements of energy efficiency and green production in the tobacco processing field, and reduce energy consumption and cost in the production process. However, in the actual tobacco extraction process, the recovered carbon dioxide is high in temperature due to the extraction process. When the high-temperature carbon dioxide enters the energy-saving high-pressure pump for pressurization, the plunger in the high-pressure pump is heated and rapidly rises in temperature. The plunger, as the core moving part of the high-pressure pump for pressurization, is high in temperature, which seriously affects the movement accuracy and sealing performance. Not only can the high temperature of the plunger lead to a decrease in the pressurization efficiency of the high-pressure pump and unstable pressure output, but also can accelerate the wear of the plunger and the sealing element, shorten the service life of the components, even cause equipment failure, affect the continuity of the carbon dioxide recycling after tobacco extraction, and further interfere with the stable operation of the entire tobacco processing process. To solve the problem of overheating of the plunger, the existing technology usually provides an additional cooling mechanism for the energy-saving high-pressure pump. However, the current cooling mechanism has obvious defects. On the one hand, most cooling mechanisms use independent power driving components, such as an additional motor driving a cooling fan or a cooling pump, which greatly increases the overall energy consumption of the equipment, which is contrary to the energy-saving design concept of the energy-saving high-pressure pump, and the additional energy consumption also increases the production cost of tobacco processing. On the other hand, the cooling path of the cooling mechanism is not reasonably designed, and the cooling medium or cooling air flow cannot accurately and efficiently act on the heated plunger, so that the heat on the surface of the plunger cannot be quickly removed, the cooling effect is poor, and the cooling demand of the plunger in the high-temperature carbon dioxide pressurization scene cannot be met, and the problems caused by the overheating of the plunger cannot be fundamentally solved.

[0003] In addition, the existing cooling mechanism has low integration with the high-pressure pump, occupies a large equipment installation space, and may interfere with the layout of components around the high-pressure pump, increasing the complexity of equipment maintenance. In summary, in the scene of carbon dioxide recovery and pressurization after tobacco extraction, the existing energy-saving high-pressure pump equipped with a cooling mechanism faces technical problems such as high energy consumption of the cooling mechanism, poor cooling effect, and low integration, which seriously restricts the application effect and promotion of the energy-saving high-pressure pump in this specific field. Therefore, it is urgent to optimize and improve the cooling structure of the energy-saving high-pressure pump to adapt to the actual needs of high-temperature carbon dioxide pressurization in tobacco extraction and ensure stable, efficient, and energy-saving operation of the equipment.

[0004] In the tobacco extraction process, high-temperature and high-pressure carbon dioxide medium not only easily leads to overheating of the plunger, but also exacerbates the aging of the sealing element due to its strong permeability. At the same time, the connection stability of the crankcase and the pump case under high pressure environment is severely tested. The traditional high-pressure pump often has problems such as sealing failure and loose connection due to lack of targeted design, which seriously affects the continuity of the extraction process. The present application customizes improvements from multiple dimensions such as heat dissipation, sealing protection, and structural reinforcement to ensure long-term stable operation of the equipment under high temperature (60-80℃) and high pressure (20MPa) working conditions. SUMMARY

[0005] (I) Technical problems solved In view of the shortcomings of the prior art, the present application provides an energy-saving high-pressure pump for carbon dioxide pressurization, which can adapt to the high-temperature carbon dioxide pressurization scene in tobacco extraction, reduce equipment energy consumption, maintenance complexity, and production cost while ensuring stable, efficient, and energy-saving operation of the energy-saving high-pressure pump. The present application solves the problem of high energy consumption of the cooling mechanism of the existing energy-saving high-pressure pump, poor cooling effect, low integration with the pump body, and overheating of the plunger affecting equipment operation during high-temperature carbon dioxide pressurization after tobacco extraction.

[0006] (II) Technical solutions To achieve the above-mentioned purposes, the present application provides the following technical solutions: The utility model provides an energy -conserving high pressure pump for carbon dioxide pressurization, including drive motor and plunger pump, the plunger pump includes crankcase, pump box and a plurality of plunger, the input shaft in the crankcase is fixed with pulley, the output shaft of drive motor is connected with pulley transmission, the tail of plunger is driven to slide through the crankshaft in the crankcase, and the end of plunger is located in pump box reciprocating motion, the pulley is provided with the fan blade for heat dissipation, the middle section of plunger is located in the clearance between the crankcase and pump box and slides, and the inter -box assembly is further provided between the crankcase and pump box, the inter -box assembly includes the upper and lower shunt seat connected between the crankcase and pump box, the upper and lower shunt seat is located respectively on the both sides of plunger, the inner side of the upper shunt seat is provided with the inwardly inclined side drainage plate, the inner side of the lower shunt seat is provided with the outwardly inclined middle drainage plate, the middle drainage plate is equipped with the oil guide channel for guiding the oil dirt to the back and discharging, the back of the inter -box assembly is further provided with the rear vertical seat, the back of the rear vertical seat is provided with the exhaust hole in the area between the upper shunt seat and the lower shunt seat, and the bottom of the rear vertical seat is provided with the sewage tank, which is used for collecting the oil dirt discharged from the oil guide channel.

[0007] Preferably, the bottom of the upper shunt seat is provided with two symmetrical upper inclined plates, the two upper inclined plates are respectively arranged on the two sides close to the crankcase and the pump box, the two upper inclined plates are inclined downward to form a V shape near the middle position, and an upper plate gap is left between the two upper inclined plates.

[0008] Preferably, the top of the upper shunt seat is composed of upper edge plates on both sides and an upper middle plate in the middle, the upper edge plates and the upper middle plate are slidingly connected and provided with elastic components at the sliding connection, and the side drainage plates and the upper inclined plates are fixed on the corresponding upper edge plates.

[0009] Preferably, the positioner is a diffuse reflection type infrared photoelectric sensor, the positioning ring is provided with a high reflectivity reflector on one side corresponding to the positioner, and the width of the slot between the upper plates is greater than the width of the reflector on the positioning ring, so that the positioner can completely detect the reflector signal.

[0010] Preferably, the middle flow guide plate comprises a front plate located on the front side, the middle position of the front plate is protruded forward, and the two side positions of the front plate are inclined backward, so as to guide the airflow to the two sides; the middle flow guide plate further comprises two side plates located on the two sides, a plurality of side holes are arranged on the side plates, and a gap is left between the lowest side hole on the side plate and the oil guide channel in the middle flow guide plate, so as to prevent oil stains from flowing out of the oil guide channel through the side hole; the middle flow guide plate further comprises a back plate located on the back side, and a back groove is arranged on the back plate at a position corresponding to the oil guide channel, so that the oil stains are discharged to the rear vertical seat through the back groove.

[0011] Preferably, the connecting mechanism comprises a front connecting plate, a rear connecting plate and a center connecting column, the front connecting plate is used for connecting and fixing the front side of the crankcase and the pump case, the rear connecting plate is used for connecting and fixing the rear side of the crankcase and the pump case, and a plurality of rear connecting plates are uniformly arrayed at positions between the crankcase and the pump case.

[0012] Preferably, the front connecting plate is connected and fixed at the middle position of the front side of the crankcase and the pump case, the rear connecting plate is connected and fixed at the upper and lower two side positions of the rear side of the crankcase and the pump case, and each center connecting column is arranged at a position corresponding to the edge of the plunger.

[0013] Preferably, the high-pressure pump further comprises a control box, and the control box is used for connecting and controlling the driving motor.

[0014] Preferably, the driving motor drives the belt pulley to rotate through the belt, an outer wheel of the belt pulley is provided with a belt pulley groove, a hub of the belt pulley is fixedly connected with the input shaft, and the fan blades of the belt pulley are circumferentially arranged between the inner shaft and the outer wheel.

[0015] Preferably, the side flow guide plate is a variable curvature arc structure, the curvature radius of the arc surface of the side flow guide plate gradually decreases from the outer side of the upper flow distribution seat to the inner side, the windward side edge of the side flow guide plate is provided with sawtooth-shaped flow guide teeth, the tooth height of the flow guide teeth linearly decreases downward from the top of the side flow guide plate, and the leeward side of the side flow guide plate is integrally formed with a plurality of turbulence convex points which are uniformly distributed along the length direction.

[0016] (Three) beneficial effects Compared with the prior art, the present application provides an energy-saving high-pressure pump for carbon dioxide pressurization, which has the following beneficial effects: 1. The energy-saving high-pressure pump for carbon dioxide pressurization, in order to solve the problem of fast temperature rise of the plunger due to high temperature of carbon dioxide, the plunger is cooled by the fan blades on the pulley, the airflow from the pulley to each plunger is blocked by the connecting structure or other plungers, resulting in low cooling efficiency, by setting the inter-bank assembly between the crankcase and the pump tank, the airflow originally parallel to the plunger is guided from top to bottom to cool the plunger by the upper and lower split seats on both sides, the side flow plate actively guides the airflow to the plunger, the middle flow plate forms a negative pressure in the middle area by tilting outward, both of which solve the combined problems of airflow obstruction and oil accumulation; secondly, the airflow guided from top to bottom by the inter-bank assembly can also remove the oil stains on the plunger, the oil stains are discharged downward into the lower split seat and then into the rear vertical seat for collection; and the inter-bank assembly can also support and fix the connection between the crankcase and the pump tank; finally, the rear vertical seat on the back of the inter-bank assembly can not only collect oil stains and exhaust air, but also prevent fragments or oil stains from splashing due to direct blowing.

[0017] 2. The energy-saving high-pressure pump for carbon dioxide pressurization, by setting the upper and lower inclined plates of V-shaped on the upper and lower split seats, first, the upper inclined plate can promote the airflow in the upper split seat to converge in the middle, increasing the downward extension length of the middle channel, the lower inclined plate can expand the independent area of the two side channels, the triangular area upward protruding can promote the airflow to pass straight through when flowing in the two side channels, improving the suction force in the middle; at the same time, the lower inclined plate inclined downward to the middle can concentrate the oil stains falling downward to the lower plate slot, thereby collecting in the middle flow plate, that is, optimizing the airflow cooling and guiding while improving the oil stain removal effect.

[0018] 3. The energy-saving high-pressure pump for carbon dioxide pressurization, by setting the upper and lower split seats as two symmetrical and sliding assemblies, and setting the positioning ring and the positioning instrument on the plunger and the upper middle plate respectively, the positioning instrument collects the time when the positioning ring appears, which is used to detect the movement phase of each plunger, and can also detect the width of the upper plate slot to judge whether the connection between the crankcase and the pump tank is loose.

[0019] 4. The energy-saving high-pressure pump for carbon dioxide pressurization, by using the variable curvature arc structure to guide the airflow to form a gradual acceleration effect, avoiding vortex loss in the airflow guiding process, the sawtooth guide teeth can divide the concentrated airflow into multiple uniform sub-airflows to meet the cooling needs of multiple plungers, and the leeward side turbulence bumps can further disrupt the airflow boundary layer to improve the heat exchange efficiency between the airflow and the plunger surface. Compared with the traditional flat or fixed curvature flow guide plate, this shape improvement simultaneously realizes the multiple functions of airflow guiding, equalization, acceleration and turbulence, solving the technical problem that a single structure flow guide plate cannot balance the airflow uniformity and cooling efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The overall structure of the present application.

[0021] Figure 2 The structure of the plunger pump of the present application.

[0022] Figure 3 The exploded view of the connecting mechanism part of the plunger pump of the present application.

[0023] Figure 4 The structure of the plunger pump of the present application.

[0024] Figure 5 The structure of the front of the lower flow distribution seat of the present application.

[0025] Figure 6 The structure of the back of the lower flow distribution seat of the present application.

[0026] Figure 7 The structure of the upper flow distribution seat of the present application.

[0027] Figure 8 The structure of the rear vertical seat of the present application.

[0028] Figure 9 The structure of the plunger of the present application.

[0029] Figure 10 The sectional view of the present application.

[0030] In the figure: 11, driving motor; 12, control box; 13, belt wheel; 14, plunger pump; 2, input shaft; 3, crankcase; 4, pump box; 5, plunger; 51, positioning ring; 6, connecting mechanism; 61, front connecting plate; 62, rear connecting plate; 63, center connecting column; 7, inter-box assembly; 71, upper flow distribution seat; 711, upper inclined plate; 712, inter-plate slot; 713, side flow guide plate; 714, upper edge plate; 715, upper middle plate; 7151, positioning instrument; 72, lower flow distribution seat; 721, lower inclined plate; 722, inter-plate slot; 723, middle flow guide plate; 724, lower edge plate; 725, lower middle plate; 7231, side hole; 7232, back slot; 73, rear vertical seat; 731, exhaust hole; 732, sewage slot. DETAILED DESCRIPTION

[0031] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0032] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] In addition, fixed connection refers to the connection of parts or components after being fixed without any relative movement; transmission connection refers to a connection mode of transmitting mechanical movement or torque to other working components through a transmission member; sliding connection refers to a connection mode in which two objects are in contact but not fixed, and the two objects can slide relative to each other; and rotating connection refers to a connection mode in which two objects are in contact but not fixed, and the two objects can rotate relative to each other.

[0034] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0035] Embodiment one: The embodiment provides an energy-saving high-pressure pump for carbon dioxide pressurization, which has the following technical features.

[0036] Please refer to Figures 1-10The utility model provides an energy -conserving high pressure pump for carbon dioxide pressurization, including drive motor 11 and plunger pump 14, plunger pump 14 includes crankcase 3, pump box 4 and a plurality of plunger 5, the input shaft 2 in the crankcase 3 is fixed with belt pulley 13, and the output shaft of drive motor 11 is connected with belt pulley 13 transmission, the tail of plunger 5 is driven to slide through the crankshaft in the crankcase 3, and the end of plunger 5 is located in pump box 4 and reciprocates, the fan blade for heat dissipation is set up on belt pulley 13, the middle section of plunger 5 is located in the gap between crankcase 3 and pump box 4 and slides, and the inter -box assembly 7 is also set up between crankcase 3 and pump box 4;Inter -box assembly 7 includes the upper and lower shunt seat 71 and 72 connected between crankcase 3 and pump box 4, and the upper and lower shunt seat 71 and 72 are located on the upper and lower sides of plunger 5 respectively, the inwardly inclined side drainage plate 713 is set up in the upper and lower shunt seat 71, the outwardly inclined middle drainage plate 723 is set up in the upper and lower shunt seat 72, the oil guide channel for guiding the oil dirt to the back is arranged in the middle drainage plate 723, the rear vertical seat 73 is also set up on the back of inter -box assembly 7, the exhaust hole 731 is set up on the back of rear vertical seat 73 in the area between the upper and lower shunt seat 71 and 72, and the sewage tank 732 is set up in the bottom of rear vertical seat 73, which is used to collect the oil dirt discharged from the oil guide channel.

[0037] In an alternative embodiment, the bottom of the upper shunt seat 71 is provided with two symmetrical upper inclined plates 711, which are respectively arranged on the two sides close to the crankcase 3 and the pump box 4, and the two upper inclined plates 711 are inclined downward to form a V shape near the middle position, and the upper plate gap 712 is left between the two upper inclined plates 711;The top of the lower shunt seat 72 is provided with two symmetrical lower inclined plates 721, which are respectively arranged on the two sides close to the crankcase 3 and the pump box 4, and the two lower inclined plates 721 are inclined downward to form a V shape near the middle position, and the lower plate gap 722 is left between the two lower inclined plates 721, and the oil guide channel in the middle drainage plate 723 is located directly below the lower plate gap 722.

[0038] In an alternative embodiment, the top of the upper flow distribution seat 71 is composed of two side upper edge plates 714 and a middle upper middle plate 715, the upper edge plates 714 and the upper middle plate 715 are slidingly connected and an elastic component is arranged at the sliding connection, the side flow guide plate 713 and the upper inclined plate 711 are fixed on the corresponding upper edge plate 714; the bottom of the lower flow distribution seat 72 is composed of two side lower edge plates 724 and a middle lower middle plate 725, the lower edge plates 724 and the lower middle plate 725 are slidingly connected and an elastic component is arranged at the sliding connection, the middle flow guide plate 723 is fixedly connected to the lower middle plate 725, and the lower inclined plate 721 is fixedly connected to the corresponding lower edge plate 724; a positioning ring 51 is arranged on each plunger 5, a plurality of position detectors 7151 are arranged on the bottom of the upper middle plate 715 above the corresponding upper plate gap 712, each position detector 7151 is located above the corresponding plunger 5, and the position detector 7151 and the positioning ring 51 are used to detect the movement phase of each plunger 5 and judge whether the connection between the crankcase 3 and the pump box 4 is loose by detecting the width of the side flow guide plate 713.

[0039] Further, the elastic component is a spring arranged in the sliding groove of the upper edge plate 714 and the upper middle plate 715, and the lower edge plate 724 and the lower middle plate 725.

[0040] In an alternative embodiment, the position detector 7151 is a diffuse reflection type infrared photoelectric sensor, the side of the positioning ring 51 corresponding to the position detector 7151 is provided with a high-reflectivity reflector, and the width of the upper plate gap 712 is greater than the width of the reflector on the positioning ring 51, so as to ensure that the position detector 7151 can completely detect the reflector signal.

[0041] It should be noted that each position detector 7151 is connected to a controller, the controller provides power for the position detector 7151, and the time period when each position detector 7151 receives the reflected signal of the positioning ring 51 is the occurrence time period, the length of the occurrence time period is the occurrence length, the synchronization rate of each plunger 5 can be judged by comparing the interval time of the occurrence time period of each plunger 5, the width of the upper plate gap 712 can be judged by comparing the occurrence length of each plunger 5, and the distance between the crankcase 3 and the pump box 4 can be judged by analyzing the width of the upper plate gap 712, that is, whether the connection between the pump box 4 and the crankcase 3 is loose.

[0042] In an optional embodiment, the central guide plate 723 includes a front plate located on the front side, with the middle of the front plate protruding forward and the two sides of the front plate tilting backward to guide the airflow to both sides; the central guide plate 723 also includes two side plates located on both sides, with a plurality of side holes 7231 provided on the side plates, and a gap is left between the side hole 7231 with the lowest height on the side plate and the oil guiding channel in the central guide plate 723 to prevent oil from flowing out of the oil guiding channel from the side hole; the central guide plate 723 also includes a back plate located on the back side, with a back groove 7232 provided on the back plate at the position corresponding to the oil guiding channel, and oil from the back groove 7232 is discharged into the rear upright seat 73.

[0043] In an optional embodiment, a connecting mechanism 6 is further provided between the crankcase 3 and the pump case 4. The connecting mechanism 6 includes a front connecting plate 61, a rear connecting plate 62 and a central connecting column 63. The front connecting plate 61 is used to connect and fix the front sides of the crankcase 3 and the pump case 4, and the rear connecting plate 62 is used to connect and fix the rear sides of the crankcase 3 and the pump case 4. Multiple rear connecting plates 62 are evenly arrayed and distributed between the crankcase 3 and the pump case 4.

[0044] In an optional embodiment, the front connecting plate 61 is fixed to the middle position of the front side of the crankcase 3 and the pump case 4, the rear connecting plate 62 is fixed to the upper and lower sides of the rear side of the crankcase 3 and the pump case 4, and each central connecting post 63 is set at the edge position of the corresponding plunger 5.

[0045] In an optional embodiment, the high-pressure pump further includes a control box 12 for connecting and controlling the drive motor 11.

[0046] Furthermore, the control box 12 is equipped with a controller for starting and stopping the drive motor 11, adjusting its speed, and performing fault alarm functions. The controller is also connected to the positioning device 7151 via a signal connection.

[0047] In an optional embodiment, the drive motor 11 drives the pulley 13 to rotate via a belt. The outer wheel of the pulley 13 is provided with a pulley groove. The hub of the pulley 13 is fixedly connected to the input shaft 2. The fan blades on the pulley 13 are circumferentially arranged between the inner shaft and the outer wheel.

[0048] Furthermore, the fan blade and pulley 13 are integrally formed, and the surface of the fan blade is provided with a spiral guide groove, the direction of the guide groove is consistent with the rotation direction of the pulley.

[0049] In an optional embodiment, the side guide plate 713 is a variable curvature arc structure, the radius of curvature of its arc surface gradually decreases from the outside near the upper diverter seat 71 to the inside, and the windward edge of the side guide plate 713 is set as a sawtooth guide tooth, the tooth height of the guide tooth decreases linearly from the top of the side guide plate 713 downward, and the leeward side of the side guide plate 713 is integrally formed with multiple turbulence protrusions evenly distributed along the length direction.

[0050] In an optional embodiment, a removable oil collection box is provided at the bottom of the sewage tank 732, a sealing gasket is provided at the connection between the sewage tank 732 and the oil collection box, an oil level scale line is marked on the outside of the oil collection box, and an oil drain valve is provided at the bottom of the oil collection box.

[0051] In an optional embodiment, the control box 12 is equipped with a pressure sensor and a temperature sensor. The pressure sensor is connected to the outlet pipe of the pump box 4, and the detection end of the temperature sensor extends into the gap between the crankcase 3 and the pump box 4. An alarm module is provided on the control box 12. When the pressure or temperature exceeds the preset threshold, the alarm module activates an audible and visual alarm.

[0052] It should be noted that the sliding direction of the upper plate 714 and the upper middle plate 715, and the sliding direction of the lower plate 724 and the lower middle plate 725 is horizontal radial sliding (along the arrangement direction of the plungers 5). The core function of the elastic component is to compensate for the small gap changes between the crankcase 3 and the pump case 4 and to provide elastic support. At the same time, it buffers the vibration generated by the movement of the plungers, ensuring that the detection distance between the positioning instrument 7151 and the positioning ring 51 is stable and avoiding the distortion of the detection signal due to vibration.

[0053] It should be noted that the pressure sensor, temperature sensor, and positioning device 7151 share the same controller within the control box. Sensor signals are transmitted to the controller in real time for data fusion and analysis. When multiple anomalies occur simultaneously, the alarm priority is: excessive pressure (highest) > excessive temperature > loose connection, to avoid multiple alarms accumulating and causing misjudgment by operators.

[0054] It should be noted that the distance between the lowest side hole 7231 on the side plate and the oil guide channel is 5-8mm. This can prevent oil from overflowing from the side hole under the influence of airflow, while ensuring that the airflow passes through the side hole normally to form a negative pressure drainage effect.

[0055] Further improvements include adding a nano-hydrophobic coating to the serrated guide teeth surface of the side guide plate 713 to reduce oil adhesion and lower the cleaning frequency; and changing the front plate protrusion curvature of the middle guide plate 723 from a fixed value to an adjustable structure (the protrusion height is adjusted by bolts) to adapt to the airflow speed requirements under different working conditions (such as increasing the protrusion curvature when the high-pressure pump is at low speed to improve airflow guidance).

[0056] Further improvements include the addition of phase marking lines to the reflector of the positioning ring 51. The positioning instrument 7151 can more accurately calculate the phase difference of the piston 5's movement by identifying the number of marking lines. A strain gauge sensor is added to the connection surface between the crankcase 3 and the pump box 4, forming a dual verification with the positioning instrument's detection results, thereby improving the reliability of the connection loosening judgment.

[0057] Further improvements include adding a primary filter cotton between the wastewater tank 732 and the oil collection box to filter metal debris in the oil and prevent the debris from damaging the equipment; and linking the oil level scale of the oil collection box with the controller so that when the oil level reaches the warning threshold, the controller automatically sends an alert signal (such as a remote push to the operating terminal), eliminating the need for real-time manual inspection.

[0058] Further improvements include the addition of micro-turbulence ribs in the fan blade guide groove of pulley 13 to further enhance the turbulence of the airflow and improve the heat exchange efficiency with the surface of plunger 5; and the addition of heat dissipation fins on the outer wall of pump box 4 to form a composite heat dissipation system with the fan blades, which is suitable for carbon dioxide pressurization scenarios at higher temperatures.

[0059] Further improvements include the use of quick-release buckles and threaded auxiliary fixing structures for the oil collection box and sewage tank 732, facilitating quick disassembly and cleaning; the sealing gasket is made of fluororubber, which is suitable for the temperature environment during the operation of the high-pressure pump and prevents oil leakage. Further improvements include the addition of a metal dustproof mesh at the exhaust port 731 of the rear vertical base 73 to prevent external debris from entering the equipment; and the installation of a safety valve (with an opening pressure of 1.2 times the rated working pressure) on the outlet pipeline of the pump box 4. In the event of a pressure sensor failure, overpressure protection is achieved through a mechanical structure to prevent equipment damage.

[0060] Further improvements include ensuring that the vertical distance between the positioning device 7151 and the positioning ring 51 is 10-15mm during installation, and that the reflector surface is free of oil stains; before the device is started for the first time, the reference appearance time of each plunger 5 (the standard value under no loose connection state) needs to be calibrated by the controller as a reference for subsequent width change judgment. Further improvements include the use of aluminum alloy (with anodized surface treatment) for the upper diverter seat 71, lower diverter seat 72, and middle diverter plate 723, which combines lightweight and corrosion resistance; the positioning ring 51 is made of stainless steel, and the reflector is made of polycarbonate substrate + high reflective aluminum film to ensure service life in high temperature and oily environments.

[0061] This invention, through the coordinated design of the integrated fan blades and chamber components, reduces energy consumption by more than 35% compared to traditional high-pressure pumps equipped with independent cooling mechanisms in high-temperature carbon dioxide pressurization scenarios for tobacco extraction (inlet carbon dioxide temperature 60-80℃, working pressure 20MPa). The plunger heat dissipation efficiency is improved by 40%, and the plunger surface temperature is stably controlled below 85℃ during operation, a reduction of 25-30℃ compared to traditional equipment. The oil collection rate reaches 98%, effectively reducing seal wear. The equipment maintenance cycle is extended by 60%, and maintenance costs are reduced by 45%, significantly meeting the core needs of green production and cost reduction in the tobacco processing industry.

[0062] In summary, this energy-saving high-pressure pump for carbon dioxide pressurization addresses the issue of rapid temperature rise of the plunger 5 due to the high temperature of carbon dioxide. It uses fan blades on the pulley 13 to dissipate heat from the plunger 5. However, the airflow path from the pulley 13 to each plunger 5 is obstructed by the connecting structure or other plungers 5, resulting in low heat dissipation efficiency. To address this, an inter-box assembly 7 is installed between the crankcase 3 and the pump box 4. The upper and lower flow dividers 71 and 72 on both sides guide the airflow, originally parallel to the plunger 5, to a top-down direction for heat dissipation. The side guide plate 713 actively directs the airflow towards the plunger. The central guide plate 723 creates negative pressure in the middle area by tilting outwards, which together solves the combined problems of airflow obstruction and oil accumulation. Secondly, the airflow guided from top to bottom by the chamber assembly 7 can also remove oil stains on the plunger 5. The oil stains are discharged downwards into the lower distributor seat 72 and then into the rear vertical seat 73 for collection. Furthermore, the chamber assembly 7 can also support and fix the connection between the crankcase 3 and the pump box 4. Finally, in addition to collecting oil stains and exhausting air, the rear vertical seat 73 on the back of the chamber assembly 7 can also prevent direct airflow from causing fragments or oil stains to splash.

[0063] Addressing the specific sealing performance requirements of high-temperature and high-pressure tobacco extraction scenarios, this invention utilizes a directional airflow generated by the chamber components to continuously purge the plunger surface, reducing direct contact between the high-temperature carbon dioxide medium and the seals. Simultaneously, efficient oil collection prevents contamination of the sealing surface, extending the seal's service life by over 50%. For adaptability to the corrosive nature of high-pressure media, the upper and lower flow dividers and the middle flow guide plate are all made of anodized aluminum alloy, forming a dense protective layer on the surface. This layer can withstand the slight corrosiveness of carbon dioxide under high pressure, ensuring long-term operation of the equipment without structural damage.

[0064] This energy-saving high-pressure pump for carbon dioxide pressurization utilizes V-shaped upper inclined plates 711 and lower inclined plates 721 on opposite sides of the upper and lower flow dividers 71 and 72, respectively. First, the upper inclined plate 711 promotes the airflow within the upper flow divider 71 to converge towards the center, increasing the downward extension length of the central channel. The lower inclined plate 721 expands the independent areas of the two side channels, and the upward-convex triangular area promotes the airflow to maintain a straight path when flowing through the two side channels, increasing the suction force to the center. Simultaneously, the lower inclined plate 721, which slopes downward towards the center, concentrates the dripping oil stains at the lower plate groove 722, thereby collecting them in the central flow guide plate 723. In other words, it optimizes the airflow heat dissipation guidance while improving the oil stain removal effect.

[0065] This energy-saving high-pressure pump for carbon dioxide pressurization sets the upper flow divider 71 and the lower flow divider 72 as two symmetrical and mutually sliding components. A positioning ring 51 and a positioning device 7151 are respectively set on the plunger 5 and the upper middle plate 715. The positioning device 7151 collects the time of appearance of the positioning ring 51, which is used to detect the movement phase of each plunger 5. It can also determine whether the connection between the crankcase 3 and the pump box 4 is loose by detecting the width of the groove 712 between the upper plates.

[0066] This energy-saving high-pressure pump for carbon dioxide pressurization uses a variable curvature arc structure to guide airflow, creating a gradual acceleration effect and avoiding eddy current losses during the airflow diversion process. The serrated guide teeth can divide the concentrated airflow into multiple uniform sub-airflows, adapting to the heat dissipation needs of multiple plungers 5. The leeward-side turbulence protrusions further disrupt the airflow boundary layer, improving the heat exchange efficiency between the airflow and the plunger 5 surface. Compared to traditional planar or fixed-curvature guide plates, this shape improvement simultaneously achieves multiple functions of airflow guidance, equalization, acceleration, and turbulence, solving the technical challenge of a single-structure guide plate failing to simultaneously achieve airflow uniformity and heat dissipation efficiency.

[0067] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0068] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy-saving high-pressure pump for carbon dioxide pressurization, comprising a drive motor (11) and a plunger pump (14), wherein the plunger pump (14) comprises a crankcase (3), a pump housing (4), and a plurality of plungers (5), wherein a pulley (13) is fixed on an input shaft (2) disposed in the crankcase (3), the output shaft of the drive motor (11) is connected to the pulley (13) for transmission, the tail of the plunger (5) is driven to slide by the crankshaft in the crankcase (3), and the end of the plunger (5) reciprocates within the pump housing (4), characterized in that, The pulley (13) is provided with fan blades for heat dissipation, the middle section of the plunger (5) slides in the gap between the crankcase (3) and the pump box (4), and an inter-box assembly (7) is also provided between the crankcase (3) and the pump box (4). The chamber assembly (7) includes an upper distributor seat (71) and a lower distributor seat (72) connected between the crankcase (3) and the pump box (4). The upper distributor seat (71) and the lower distributor seat (72) are located on the upper and lower sides of the plunger (5), respectively. The upper distributor seat (71) has inwardly inclined side guide plates (713) on both sides. The lower distributor seat (72) has an outwardly inclined middle guide plate (723) in the middle. The middle guide plate (723) has an oil guide channel for guiding oil sludge to be discharged to the back. The back of the chamber assembly (7) is also provided with a rear vertical seat (73). The back of the rear vertical seat (73) has an exhaust hole (731) in the area between the upper distributor seat (71) and the lower distributor seat (72). The bottom of the rear vertical seat (73) is provided with a sewage tank (732) for collecting oil sludge discharged from the oil guide channel.

2. The energy-saving high-pressure pump for carbon dioxide pressurization according to claim 1, characterized in that, The bottom of the upper diverter seat (71) is provided with two symmetrical upper inclined plates (711). The two upper inclined plates (711) are respectively located on both sides near the crankcase (3) and the pump box (4). The two upper inclined plates (711) are inclined downward to form a V shape near the middle position. A groove (712) is left between the two upper inclined plates (711). The top of the lower distributor seat (72) is provided with two symmetrical lower inclined plates (721). The two lower inclined plates (721) are respectively located on both sides near the crankcase (3) and the pump box (4). The two lower inclined plates (721) are inclined downward to form a V shape near the middle position. A lower plate groove (722) is left between the two lower inclined plates (721). The oil guide channel in the middle guide plate (723) is located directly below the lower plate groove (722).

3. The energy-saving high-pressure pump for carbon dioxide pressurization according to claim 2, characterized in that, The top of the upper diversion seat (71) is composed of upper side plates (714) on both sides and upper middle plate (715) in the middle. The upper side plates (714) and upper middle plate (715) are slidably connected and an elastic component is provided at the slid connection. The side diversion plate (713) and the upper inclined plate (711) are fixed on the corresponding upper side plates (714). The bottom of the lower diversion seat (72) is composed of lower side plates (724) on both sides and a lower middle plate (725) in the middle. The lower side plates (724) and the lower middle plate (725) are slidably connected and an elastic component is provided at the sliding connection. The middle diversion plate (723) is fixedly connected to the lower middle plate (725), and the lower inclined plate (721) is fixedly connected to the corresponding lower side plate (724). A positioning ring (51) is provided on each plunger (5). Multiple positioning instruments (7151) are provided at the bottom of the upper middle plate (715) directly above the corresponding upper plate groove (712). Each positioning instrument (7151) is located directly above the corresponding plunger (5). The positioning instrument (7151) and the positioning ring (51) are used to detect the movement phase of each plunger (5) and can also determine whether the connection between the crankcase (3) and the pump box (4) is loose by detecting the width of the side guide plate (713).

4. The energy-saving high-pressure pump for carbon dioxide pressurization according to claim 3, characterized in that, The positioning device (7151) is a diffuse reflection infrared photoelectric sensor. The positioning ring (51) is provided with a high reflectivity reflector on one side of the positioning device (7151). The width of the slot (712) between the upper plates is greater than the width of the reflector on the positioning ring (51) to ensure that the positioning device (7151) can completely detect the reflector signal.

5. The energy-saving high-pressure pump for carbon dioxide pressurization according to claim 3, characterized in that, The central air intake plate (723) includes a front plate located on the front side, with the middle of the front plate protruding forward and the two sides of the front plate tilting backward, thereby guiding the airflow to both sides; The central drain plate (723) also includes two side plates located on both sides. Multiple side holes (7231) are provided on the side plates. The side hole (7231) with the lowest height on the side plate is separated from the oil guide channel in the central drain plate (723) to prevent oil from flowing out of the oil guide channel from the side hole. The middle drain plate (723) also includes a back plate located on the back side, and a back groove (7232) is provided on the back plate at the position corresponding to the oil guide channel, and the oil sludge is discharged from the back groove (7232) into the rear upright seat (73).

6. The energy-saving high-pressure pump for carbon dioxide pressurization according to claim 5, characterized in that, A connecting mechanism (6) is also provided between the crankcase (3) and the pump case (4). The connecting mechanism (6) includes a front connecting plate (61), a rear connecting plate (62) and a central connecting column (63). The front connecting plate (61) is used to connect and fix the front side of the crankcase (3) and the pump case (4). The rear connecting plate (62) is used to connect and fix the rear side of the crankcase (3) and the pump case (4). Multiple rear connecting plates (62) are evenly arrayed and distributed between the crankcase (3) and the pump case (4).

7. The energy-saving high-pressure pump for carbon dioxide pressurization according to claim 6, characterized in that, The front connecting plate (61) is fixed to the middle position of the front side of the crankcase (3) and the pump box (4), and the rear connecting plate (62) is fixed to the upper and lower sides of the rear side of the crankcase (3) and the pump box (4). Each central connecting post (63) is set at the edge position of the corresponding plunger (5).

8. The energy-saving high-pressure pump for carbon dioxide pressurization according to claim 3, characterized in that, The high-pressure pump also includes a control box (12) for connecting and controlling the drive motor (11).

9. The energy-saving high-pressure pump for carbon dioxide pressurization according to claim 3, characterized in that, The drive motor (11) drives the pulley (13) to rotate via a belt. The outer wheel of the pulley (13) is provided with a pulley groove. The hub of the pulley (13) is fixedly connected to the input shaft (2). The fan blades on the pulley (13) are circumferentially arranged between the inner shaft and the outer wheel.

10. An energy-saving high-pressure pump for carbon dioxide pressurization according to claim 3, characterized in that, The side guide plate (713) is a variable curvature arc structure. The radius of curvature of its arc surface gradually decreases from the outside of the upper diverter seat (71) near the upper diverter seat to the inside. The windward edge of the side guide plate (713) is set as a sawtooth guide tooth. The tooth height of the guide tooth decreases linearly from the top of the side guide plate (713) downward. The leeward side of the side guide plate (713) is integrally formed with multiple turbulence protrusions evenly distributed along the length direction.

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