Vertical pressure steam sterilizer based on biomedical engineering

Abstract

The invention relates to the technical field of biomedical sterilization, and discloses a biomedical engineering-based vertical pressure steam sterilizer, which comprises a sterilizer main body, a sterilization chamber is vertically arranged in the sterilizer main body, support arms are symmetrically and vertically arranged on the two sides of the sterilizer main body, a top seat is welded on the upper ends of the two groups of support arms, and the top seat is welded on the sterilization chamber. A lifting air cylinder is vertically installed in the middle of the upper end face of the top base, a lifting rod is movably arranged in the lifting air cylinder and penetrates through the top base downwards, and an outer cover base is welded to the lower end of the lifting rod. The corresponding pressed inclined blocks are extruded through the extrusion faces, the telescopic columns are caused to do inward linear motion, the oil plugs extrude sealing oil in the hydraulic oil cavities, the sealing oil is injected into the annular sealing oil bags through the oil pipes, and the multiple sets of hydraulic regulators evenly inject oil into the annular sealing oil bags from different positions; the contact acting force between the annular sealing oil bag and the inner wall of the sterilization chamber is enhanced, and the sealing performance of the container is obviously improved.

Description

Technical Field

[0001] The present invention relates to the technical field of biomedical sterilization, in particular to a vertical pressure steam sterilizer based on biomedical engineering. Background Art

[0002] Biomedical engineering is an engineering project that integrates the theories and methods of engineering, biology, and medicine to study life systems from the molecular to the organ level, and to develop technologies and equipment for disease prevention, diagnosis, treatment, and rehabilitation. It includes two major research areas: biomaterials and medical instruments. Pressure steam sterilizers are required when studying and using biomaterials and medical instruments. The working principle of pressure steam sterilizers is based on the irreversible destruction of microbial protein structure by high-temperature saturated steam. Its core is to achieve high-temperature sterilization by increasing the boiling point of saturated steam pressure in a closed environment.

[0003] Existing pressure steam sterilizers have many technical defects when in use. First, the end cover of the sterilizer is opened and sealed manually, which is time-consuming and labor-intensive to operate, and has poor sealing and a short service life. Second, the current pressure steam sterilizer cannot completely exhaust the cold air in the container during operation, and some residual cold air will significantly reduce the actual sterilization temperature and hinder steam penetration, resulting in poor sterilization effect. Third, due to frequent water addition, a large amount of scale accumulates on the electric heating wire, reducing the thermal conductivity of the electric heating wire. Currently, the scale on the electric heating wire is cleaned by soaking it in a descaling agent (such as sodium bicarbonate solution), but the descaling rate by soaking is slow and the descaling effect is not ideal.

[0004] In summary, considering that the existing facilities cannot meet the work requirements, we propose a vertical pressure steam sterilizer based on biomedical engineering. Summary of the Invention

[0005] The main purpose of the present invention is to provide a vertical pressure steam sterilizer based on biomedical engineering, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is: A vertical pressure steam sterilizer based on biomedical engineering includes a sterilizer body, a sterilization chamber is vertically opened inside the sterilizer body, support arms are symmetrically and vertically arranged on both sides of the sterilizer body, and top seats are welded to the upper ends of two groups of support arms. A lifting cylinder is vertically installed at the middle position of the upper end surface of the top seat, and a lifting rod is movably arranged inside the lifting cylinder and passes downward through the top seat, and an outer cover seat is welded to the lower end of the lifting rod. A limit sleeve acting on the outer cover seat is riveted to the lower end surface of the top seat of the outer cover seat.

[0007] As a preferred solution of the vertical pressure steam sterilizer based on biomedical engineering described in the present invention, wherein: a plurality of groups of receiving grooves are evenly opened on the inner side surface of the top seat, and elastic retainers are movably provided inside the receiving grooves. The number of the elastic retainers is preferably 4-6 groups, and the elastic retainers include a clamping head, a lower cut surface, a spring column, a positioning piece and a reset spring. The clamping head is located in the receiving groove, and a lower cut surface is provided at one end of the clamping head, and a spring column is connected to the other end of the clamping head. The spring column is located in the inner column groove, and a reset spring is provided between the inner column groove and the clamping head and is sleeved on the outside of the spring column. The spring column passing through the inner column groove is provided with a positioning piece.

[0008] As a preferred solution of the vertical pressure steam sterilizer based on biomedical engineering described in the present invention, wherein: a plurality of groups of external grooves corresponding to the elastic retainers are evenly opened on the edge of the upper end of the sterilizer body, and the number of the external grooves is preferably 4-6 groups, and a positioning shaft is vertically fixed in the external groove, and a fixed shaft sleeve is provided at the upper end of the positioning shaft, and an upper semicircular table is connected to the outer side of the fixed shaft sleeve, and a movable shaft sleeve is movably provided in the middle of the positioning shaft, and a strip groove is vertically opened on the outer side of the positioning shaft, and a guide slider extending into the strip groove is fixed inside the movable shaft sleeve, and a lower semicircular table is connected to the outer side of the movable shaft sleeve, and the upper and lower semicircular tables are symmetrically distributed and both act on the lower cut surface.

[0009] As a preferred solution of the vertical pressure steam sterilizer based on biomedical engineering described in the present invention, wherein: an inner cover seat is fixedly arranged at the middle position inside the outer cover seat, and the inner cover seat moves downward into the sterilization chamber, and a pressure cover is provided on the inner surface of the inner cover seat, and a plurality of groups of movable circular grooves are evenly provided on the edge of the pressure cover, and a pressure disc is movably provided in each group of the movable circular grooves, and the upper end surface of the pressure disc is fixed by a connecting spring and the inner wall of the outer cover seat, and a driving block is connected to one side of the pressure disc, and a guide groove for the movement of the driving block is provided on the inner side surface of the inner cover seat, and an extrusion surface is provided on the end of the driving block away from the pressure disc.

[0010] As a preferred solution of the vertical pressure steam sterilizer based on biomedical engineering described in the present invention, each group of the extrusion surfaces acts on a hydraulic regulator respectively, and the number of the hydraulic regulators is preferably 6-12 groups. The hydraulic regulator includes an adjusting cylinder, a hydraulic oil chamber, a telescopic column, a pressure inclined block, an oil plug, a spring, an oil hole and an oil pipe. The adjusting cylinder is horizontally fixed inside the inner cover seat. A hydraulic oil chamber is provided inside the adjusting cylinder, and the hydraulic oil chamber is for the telescopic column to extend into. A pressure inclined block is fixed on one end of the telescopic column extending out of the hydraulic oil chamber. The pressure inclined block acts on the corresponding extrusion surface. An oil plug fixed to the telescopic column is slidably provided in the hydraulic oil chamber. A spring sleeved on the outside of the telescopic column is fixed between the oil plug and the inner wall of the section cylinder. An oil hole is provided on the end of the hydraulic oil chamber away from the telescopic column, and an oil pipe extending outward is installed on the oil hole.

[0011] As a preferred solution of the vertical pressure steam sterilizer based on biomedical engineering described in the present invention, the oil pipes on each group of the hydraulic regulators are connected to the inner side of the oil bag positioning sleeve, an annular sealing oil bag is installed inside the oil bag positioning sleeve, a part of the annular sealing oil bag extends out of the outer side of the inner cover seat, the annular sealing oil bag acts on the inner wall of the upper end of the sterilization chamber, and the oil bag positioning sleeve is riveted to the inside of the inner cover seat.

[0012] As a preferred solution of the vertical pressure steam sterilizer based on biomedical engineering described in the present invention, wherein: two groups of air release sealing tubes are symmetrically installed inside the outer cover seat, and an air release valve is installed at the upper end of the air release sealing tube. The upper end surface of the sterilizer body is provided with a first sliding sealing port for the movement of the air release sealing tube, and the lower end of the air release sealing tube is connected to a bellows expansion part, and an air receiving platform is installed at the lower end of the bellows expansion part, and an electromagnet is provided in the middle of the air receiving platform. Several groups of air receiving ports connected to the bellows expansion part are evenly provided on the edge of the air receiving platform, and the number of the air receiving ports is preferably 3-4 groups.

[0013] As a preferred solution of the vertical pressure steam sterilizer based on biomedical engineering described in the present invention, an interlayer cavity is provided inside the sterilizer body and on the outer side of the sterilization chamber, a degassing sealing tube is movably provided inside the interlayer cavity, a plurality of exhaust slits connected to the interlayer cavity are evenly provided on the inner wall of the sterilization chamber, an L-shaped air transfer pipe is installed in the middle of the exhaust slit, and the number of the L-shaped air transfer pipes is preferably 3-4 groups, the lower end of the L-shaped air transfer pipe is located at the lower position inside the interlayer cavity, and a guide slope is provided at the lower end of the inner part of the interlayer cavity, the guide slope is inclined downward, and an air sedimentation groove is provided at the lowest position of the guide slope, the number of the air sedimentation grooves is 2 groups, the air sedimentation grooves are larger at the top and smaller at the bottom, and the air receiving platform extends into the air sedimentation groove during the downward movement.

[0014] As a preferred solution of the vertical pressure steam sterilizer based on biomedical engineering described in the present invention, a heating seat is installed on the inner wall of the sterilization chamber and above the exhaust slit, an electric heater is fixedly installed inside the heating seat, two groups of movable holes for the movement of the power supply heating wire are symmetrically opened on the electric heater, the electric heating wire includes two groups of horizontal parts, two groups of fixed grooves for the horizontal parts to pass through are symmetrically opened inside the heating seat, a partition is provided between the two groups of fixed grooves, a vibrator is installed in the middle of the partition, and the vibrator is provided with two groups of vibrators that act on the horizontal parts respectively.

[0015] As a preferred solution of the vertical pressure steam sterilizer based on biomedical engineering described in the present invention, wherein: a hydraulic cylinder is vertically arranged on the upper end surface of the heating seat, a hydraulic rod is arranged inside the hydraulic cylinder for downward movement, a pressure seat is welded to the lower end of the hydraulic rod, two groups of pressure plates are symmetrically fixed to the lower end of the pressure seat, the lower end of the pressure plate is provided with a curved fixing surface that acts on the horizontal part, a plurality of groups of spring receiving grooves are equidistantly provided at the bottom of the fixing groove, and a compression spring is installed in each group of the spring receiving grooves, the number of the compression springs is preferably 3-5 groups, and the upper end of the compression spring is welded with a curved insulating sleeve that acts on the lower end of the horizontal part.

[0016] As a preferred solution of the vertical pressure steam sterilizer based on biomedical engineering described in the present invention, wherein: an exhaust device is provided on the outside of the sterilizer body, one end of the exhaust device is connected to a water vapor exhaust pipe, and the other end of the exhaust device is connected to a water vapor inlet pipe, and the water vapor inlet pipe extends to the interior of the interlayer cavity, and a heat exchange tube is fixed to the interior of the interlayer cavity, and a water vapor heat exchange cavity is provided inside the heat exchange tube, and the water vapor heat exchange cavity is passed through by the degassing sealing tube, and the upper and lower ends of the heat exchange tube are provided with a second sliding sealing port for the movement of the degassing sealing tube, the lower end of the heat exchange tube is connected to the water vapor inlet pipe, and the upper end of the heat exchange tube is connected to a short exhaust pipe, and the short exhaust pipe extends to the upper position in the sterilization chamber.

[0017] As a preferred solution of the vertical pressure steam sterilizer based on biomedical engineering described in the present invention, several groups of chamfered plates for placing storage racks are evenly installed on the inner wall of the sterilization chamber, and the number of the chamfered plates is preferably 3-4 groups.

[0018] As a preferred solution of the vertical pressure steam sterilizer based on biomedical engineering described in the present invention, a safety valve communicating with the sterilization chamber is installed on the upper end surface of the outer cover.

[0019] As a preferred solution of the vertical pressure steam sterilizer based on biomedical engineering described in the present invention, a sewage pipe connected to the sterilization chamber is provided at the lower position of the outer side surface of the sterilizer body.

[0020] The present invention provides a vertical pressure steam sterilizer based on biomedical engineering through improvement, which has the following significant improvements and advantages compared with the prior art: (1) The lifting rod drives the outer cover seat to descend vertically until the outer cover seat is sleeved on the outside of the sterilizer body, and the clamps enter the outer slots respectively. The clamps use the lower cut surface to slide along the curved outer surface of the upper semi-circular table, causing the clamps to be retracted into the storage slot until the clamps and the upper semi-circular table are separated. At this time, under the elastic force of the reset spring, the clamps extend out of the storage slot and hit the bottom surface of the upper semi-circular table, unable to move upward, forming a fixed state. The lifting rod drives the outer cover seat to rise. During the rising process, the clamp pushes the lower semi-circular table upward due to the contact force between the two, until the lower semi-circular table and the upper semi-circular table merge, forming a transition arc surface for the clamp to cross, so that the clamp leaves the outer slot upward, completing the unlocking of the outer cover seat. Compared with manual opening and closing of the end cover, it can realize automatic opening and closing of the cover, saving time and effort, and enhancing the pressure resistance.

[0021] (2) The pressure of water vapor acts upward on the pressure cover, causing several groups of pressure discs to move upward under the action of air pressure, causing the drive block to move along, using the extrusion surface to squeeze the corresponding pressure-bearing inclined block, causing the telescopic column to move inward linearly, and the oil plug squeezes the sealing oil in the hydraulic oil chamber. The sealing oil is injected into the annular sealing oil bag through the oil pipe. Several groups of hydraulic regulators evenly inject oil into the annular sealing oil bag from different positions, causing the annular sealing oil bag to expand evenly outward, thereby enhancing the contact force and tightness with the inner wall of the sterilization chamber, and cooperating with the outer cover seat to form an internal and external seal, significantly improving the sealing of the container and improving the steam sterilization effect.

[0022] (3) Start the electromagnets on the two sets of air receiving tables to generate magnetic attraction acting on the bottom of the corresponding air settling groove. The air receiving table extends into the air settling groove and is adsorbed at the bottom of the groove. The cold air in the groove flows into the corrugated expansion part through several sets of air receiving ports, and then is discharged upward from the air release sealing pipe through the air release valve, and the cold air is discharged in a concentrated manner to achieve the purpose of complete exhaustion and solve the problem of residual cold air. When the liquid level at the bottom of the sterilization chamber decreases with the vaporization of pure water, by opening the control valve on the L-shaped air transfer pipe, the cold air remaining at the liquid surface is injected into the lower position of the interlayer cavity through the L-shaped air transfer pipe, and finally is discharged outward through the air release sealing pipe, solving the problem of residual cold air caused by the drop in the liquid level.

[0023] (4) The high-temperature steam is sucked into the water vapor heat exchange chamber of the heat exchange tube by using the short exhaust pipe, and is transferred outward through the water vapor inlet pipe and the water vapor exhaust pipe in turn. When the high-temperature steam flows in the water vapor heat exchange chamber, it will exchange heat with the room temperature cold air flowing downward in the exhaust sealing pipe. On the one hand, it effectively cools down the high-temperature steam and accelerates the condensation rate of the high-temperature steam. On the other hand, it allows the room temperature cold air to receive heat and be preheated to become hot air. The hot air can flow more evenly in the sterilization room, effectively balancing the indoor pressure difference, reducing the difficulty of sucking the indoor high-temperature water vapor, and improving the suction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of a vertical pressure steam sterilizer based on biomedical engineering in one direction of the present invention; Figure 2 This is a schematic diagram of the overall structure of another direction of a vertical pressure steam sterilizer based on biomedical engineering according to the present invention; Figure 3 Schematic diagram of the upper end structure of the outer cover seat of the present invention; Figure 4 Schematic diagram of the lower end structure of the outer cover seat of the present invention; Figure 5 Schematic diagram of the specific structure of the elastic fastener of the present invention; Figure 6 This is a schematic diagram of the specific internal structure of the external slot of the present invention; Figure 7 This is a schematic diagram of the specific structure of the inner cover seat of the present invention; Figure 8 This is a schematic diagram of the connection of the annular sealing oil bag of the present invention; Figure 9 Schematic diagram of the structure of the pressure disc of the present invention; Figure 10 is a cross-sectional view of a hydraulic regulator of the present invention; Figure 11 Schematic diagram of the lower end structure of the air vent sealing tube of the present invention; Figure 12 Schematic diagram of the internal structure of the sterilization chamber of the present invention; Figure 13 is a cross-sectional view of the interlayer cavity of the present invention; Figure 14 Schematic diagram of the transmission structure of the pressing plate of the present invention; Figure 15 This is a schematic diagram of the internal structure of the heating base of the present invention; Figure 16 Schematic diagram of the internal structure of the fixing groove of the present invention Figure 17 Schematic diagram of the external connection of the air release sealing tube in the second embodiment of the present invention.

[0025] Figure: 1. Sterilizer body; 2. Sterilization chamber; 3. Support arm; 4. Top seat; 5. Lifting cylinder; 6. Lifting rod; 7. Outer cover seat; 8. Limiting sleeve; 9. Storage slot; 10. Elastic retainer; 11. Clamp; 12. Lower cut surface; 13. Spring column; 14. Positioning piece; 15. Return spring; 20. Outer slot; 21. Positioning shaft; 22. Fixed shaft sleeve; 23. Upper semicircular table; 24. Moving shaft sleeve; 25. Strip slide; 26. Guide slider ; 27. Lower semicircular table; 30. Inner cover seat; 31. Pressure cover; 32. Moving circular groove; 33. Pressure disc; 34. Connecting spring; 35. Driving block; 36. Guide groove; 37. Extrusion surface; 40. Hydraulic regulator; 41. Adjusting cylinder; 42. Hydraulic oil chamber; 43. Telescopic column; 44. Pressure inclined block; 45. Oil plug; 46. Spring; 47. Oil hole; 48. Oil pipe; 50. Oil bladder positioning sleeve; 51. Annular sealing oil bladder; 60. Deflating Sealing tube; 61. Air release valve; 62. Bellows expansion unit; 63. Air receiving platform; 64. Electromagnet; 65. Air receiving port; 70. Interlayer cavity; 71. Exhaust slit; 72. L-shaped air transfer pipe; 73. Diversion slope; 74. Air settling groove; 75. First sliding sealing port; 80. Heating base; 81. Electric heater; 82. Movable hole; 83. Electric heating wire; 84. Horizontal portion; 85. Fixing groove; 86. Partition; 87. Vibrator; 88. Vibrator; 90. Hydraulic cylinder; 91. Hydraulic rod; 92. Pressure seat; 93. Pressure plate; 94. Curved fixing surface; 95. Spring receiving groove; 96. Compression spring; 97. Curved insulating sleeve; 100. Exhaust device; 101. Water vapor inlet pipe; 102. Water vapor outlet pipe; 103. Heat exchange cylinder; 104. Water vapor heat exchange chamber; 105. Second sliding sealing port; 106. Exhaust short pipe; 110. Drain pipe; 111. Safety valve; 112. Chamfered piece. DETAILED DESCRIPTION

[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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Example 1 like Figures 1-16As shown, this embodiment provides a vertical pressure steam sterilizer based on biomedical engineering, including a sterilizer body 1, a sterilization chamber 2 is vertically opened inside the sterilizer body 1, support arms 3 are symmetrically and vertically arranged on both sides of the sterilizer body 1, and top seats 4 are welded to the upper ends of the two groups of support arms 3. A lifting cylinder 5 is vertically installed at the middle position of the upper end surface of the top seat 4, and a lifting rod 6 is movably arranged inside the lifting cylinder 5 and passes downward through the top seat 4. The lower end of the lifting rod 6 is welded to an outer cover seat 7, and the lower end surface of the top seat 4 of the outer cover seat 7 is riveted with a limiting sleeve 8 acting on the outer cover seat 7, and the limiting sleeve 8 plays a role of storage and protection.

[0028] Among them, the inner side surface of the top seat 4 is evenly provided with a plurality of groups of receiving grooves 9, and the internal movable elastic retainer 10 is provided inside the receiving groove 9. Figure 4 shown.

[0029] Specifically, the elastic fastener 10 includes a clamping head 11, a lower cut surface 12, a spring column 13, a positioning piece 14 and a return spring 15. Figure 5 shown.

[0030] In this embodiment, the clamping head 11 is located in the receiving groove 9, and a lower cut surface 12 is provided at one end of the clamping head 11. The other end of the clamping head 11 is connected to a spring column 13. The spring column 13 is located in the inner column groove, and the inner column groove is located on the inner side of the receiving groove 9. A return spring 15 is provided between the inner column groove and the clamping head 11 and is sleeved on the outside of the spring column 13. After the return spring 15 is compressed, an elastic force is generated to drive the clamping head 11 to move outward. A positioning piece 14 is provided at one end of the spring column 13 that passes through the inner column groove. The positioning piece 14 limits the range of movement of the clamping head 11.

[0031] Furthermore, the upper end edge of the sterilizer body 1 is evenly provided with a plurality of groups of outer slots 20 corresponding to the elastic retainers 10, which is an outer opening structure. A positioning shaft 21 is vertically fixed in the outer slot 20, such as Figure 1 and 2 shown.

[0032] Among them, the upper end of the positioning shaft 21 is provided with a fixed sleeve 22, and the outer side of the fixed sleeve 22 is connected to an upper semi-circular platform 23, which is small at the top and large at the bottom. A blocking portion is provided at the bottom of the upper semi-circular platform 23, such as Figure 6 shown.

[0033] Among them, the middle part of the positioning shaft 21 is movably provided with a movable shaft sleeve 24, and the outer side surface of the positioning shaft 21 is vertically provided with a strip slide 25. The interior of the movable shaft sleeve 24 is fixed with a guide slider 26 extending into the strip slide 25, which plays the role of limiting the guide. The outer side of the movable shaft sleeve 24 is connected to the lower semi-circular table 27, the lower semi-circular table 27 is larger at the top and smaller at the bottom, and a blocking portion is provided on the top of the lower semi-circular table 27. The upper semi-circular table 23 and the lower semi-circular table 27 are symmetrically distributed and both interact with the lower cut surface 12. The two are combined to form a transition arc surface, which covers the blocking portion of the upper semi-circular table 23, such as Figure 6 shown.

[0034] Furthermore, an inner cover seat 30 is fixedly provided in the middle position inside the outer cover seat 7. The inner cover seat 30 moves downward into the sterilization chamber 2. A pressure-bearing cover 31 is provided on the inner surface of the inner cover seat 30. The pressure-bearing cover 31 plays a role in resisting pressure. Several groups of movable circular grooves 32 are evenly opened on the edge of the pressure-bearing cover 31. A pressure disc 33 is movably provided in each group of movable circular grooves 32. In the natural state, the pressure disc 33 is aligned with the bottom of the pressure cover 31. Figure 4 and Figure 7 shown.

[0035] Among them, the upper end surface of the pressure disc 33 is fixed by a connecting spring 34 and the inner wall of the outer cover seat 7. After the connecting spring 34 is compressed, it can drive the pressure disc 33 to automatically reset. A driving block 35 is connected to one side of the pressure disc 33. A guide groove 36 for the movement of the driving block 35 is opened on the inner side surface of the inner cover seat 30. The guide groove 36 plays the role of limiting and guiding. The end of the driving block 35 away from the pressure disc 33 is provided with an extrusion surface 37, and the extrusion surface 37 is inclined upward. Figure 8 and Figure 9 shown.

[0036] Furthermore, each set of extrusion surfaces 37 acts on the hydraulic regulator 40 respectively, such as Figure 8 shown.

[0037] Specifically, the hydraulic regulator 40 includes an adjusting cylinder 41, a hydraulic oil chamber 42, a telescopic column 43, a pressure inclined block 44, an oil plug 45, a spring 46, an oil hole 47 and an oil pipe 48, as shown in the figure. Figure 10 shown.

[0038] In this embodiment, the adjusting cylinder 41 is horizontally fixed inside the inner cover seat 30, and a hydraulic oil chamber 42 is opened inside the adjusting cylinder 41. The hydraulic oil chamber 42 stores sealing oil, and the telescopic column 43 is inserted into the hydraulic oil chamber 42. A pressure-bearing inclined block 44 is fixed on one end of the telescopic column 43 extending out of the hydraulic oil chamber 42. The pressure-bearing inclined block 44 is inclined downward, and the specific shape can be designed according to actual conditions. The pressure-bearing inclined block 44 and the corresponding extrusion surface 37 act on each other, and an oil plug 45 fixed to the telescopic column 43 is slidingly provided in the hydraulic oil chamber 42. It is a sliding seal, and a spring 46 is fixed between the oil plug 45 and the inner wall of the adjusting cylinder 41 and is sleeved on the outside of the telescopic column 43. After the spring 46 is stretched, the telescopic column 43 is driven to reset. An oil hole 47 is opened on the end of the hydraulic oil chamber 42 away from the telescopic column 43, and an oil pipe 48 extending outward is installed on the oil hole 47.

[0039] Among them, the oil pipe 48 on each group of hydraulic regulators 40 is connected to the inner side of the oil bag positioning sleeve 50. An annular sealing oil bag 51 is installed inside the oil bag positioning sleeve 50. The oil bag has the ability to reset after deformation and is resistant to high temperature. A part of the annular sealing oil bag 51 extends out of the outer side of the inner cover seat 30. The annular sealing oil bag 51 acts on the inner wall of the upper end of the sterilization chamber 2. The oil bag positioning sleeve 50 is riveted to the inside of the inner cover seat 30. Figure 8 shown.

[0040] When the air pressure disappears, the sealing oil in the expanded annular sealing oil bag 51 will flow back to the hydraulic oil chamber 42 through the oil pipe 48, causing the telescopic column 43 to return to its original position.

[0041] Furthermore, two sets of degassing sealing tubes 60 are symmetrically installed inside the outer cover 7, and a degassing valve 61 is installed on the upper end of the degassing sealing tube 60. The upper end surface of the sterilizer body 1 is provided with a first sliding sealing port 75 for the movement of the degassing sealing tube 60. The first sliding sealing port 75 is connected to the interlayer cavity 70, and a sealing ring is provided in the first sliding sealing port 75. Figure 3 、 Figure 11 and Figure 12 shown.

[0042] The lower end of the air-releasing sealing tube 60 is connected to a bellows expansion part 62, and a gas receiving platform 63 is installed at the lower end of the bellows expansion part 62. An electromagnet 64 is provided in the middle of the gas receiving platform 63, and a plurality of gas receiving ports 65 connected to the bellows expansion part 62 are evenly opened on the edge of the gas receiving platform 63. Figure 11 shown.

[0043] Furthermore, an interlayer cavity 70 is provided inside the sterilizer body 1 and on the outer side of the sterilization chamber 2. A degassing sealing tube 60 is movably provided inside the interlayer cavity 70. A plurality of exhaust slits 71 connected to the interlayer cavity 70 are evenly provided on the inner wall of the sterilization chamber 2. The exhaust slits 71 are slightly higher than the liquid level. An L-shaped air transfer pipe 72 is installed in the middle of the exhaust slit 71. A control valve is installed in the L-shaped air transfer pipe 72. The lower end of the L-shaped air transfer pipe 72 is located at a lower position inside the interlayer cavity 70. The other end of the L-shaped air transfer pipe 72 is initially located below the liquid level. Figure 12 and Figure 13 shown.

[0044] Among them, the inner lower end of the interlayer cavity 70 is provided with a guide slope 73, which is inclined downward. An air settling groove 74 is opened at the lowest position of the guide slope 73. The air settling groove 74 is large at the top and small at the bottom, which is easy to collect cold air. The air receiving platform 63 extends into the air settling groove 74 during the downward movement. The bottom of the air settling groove 74 is provided with an iron layer, such as Figure 13 shown.

[0045] Furthermore, a heating seat 80 is installed on the inner wall of the sterilization chamber 2 and above the exhaust slit 71. An electric heater 81 is fixedly installed inside the heating seat 80. Two groups of movable holes 82 for the movement of power supply heating wires 83 are symmetrically opened on the electric heater 81. The movable holes 82 can supply the power supply heating wires 83 with irregular vibrations. The electric heating wires 83 include two groups of horizontal portions 84, such as Figure 12 and Figure 15 shown.

[0046] The interior of the heating seat 80 is symmetrically provided with two sets of fixing grooves 85 for the horizontal portion 84 to pass through, a partition 86 is provided between the two sets of fixing grooves 85, a vibrator 87 is installed in the middle of the partition 86, and the vibrator 87 is provided with two sets of vibrators 88 that act on the horizontal portion 84 respectively. Figure 15 and Figure 16 shown.

[0047] Furthermore, a hydraulic cylinder 90 is vertically provided on the upper end surface of the heating seat 80. Figure 14 shown.

[0048] Specifically, a hydraulic rod 91 is provided inside the hydraulic cylinder 90 for downward movement. A pressure seat 92 is welded to the lower end of the hydraulic rod 91. Two groups of pressure plates 93 are symmetrically fixed to the lower end of the pressure seat 92. The lower end of the pressure plate 93 is provided with a curved fixing surface 94 that acts on the horizontal portion 84. The curved fixing surface 94 plays a role of full fit. A plurality of groups of spring receiving grooves 95 are equidistantly provided at the bottom of the fixing groove 85. A compression spring 96 is installed in each group of spring receiving grooves 95. The upper end of the compression spring 96 is welded with a curved insulating sleeve 97 that acts on the lower end of the horizontal portion 84. The curved insulating sleeve 97 plays a role of full fit. Figure 14 shown.

[0049] Furthermore, a plurality of groups of chamfered pieces 112 for placing storage racks are evenly installed on the inner wall of the sterilization chamber 2 to play a supporting role, such as Figure 12 shown.

[0050] Furthermore, the upper end surface of the outer cover seat 7 is provided with a safety valve 111 connected to the sterilization chamber 2. When the pressure in the chamber is too high, the safety valve 111 automatically opens to exhaust the air. Figure 3 shown.

[0051] Furthermore, a sewage pipe 110 is provided at the lower position of the outer side surface of the sterilizer body 1 and is connected to the sterilization chamber 2 for discharging sewage at the bottom of the sterilization chamber 2. Figure 1 shown.

[0052] In this embodiment, an exhaust device 100 is provided on the outside of the sterilizer body 1, one end of the exhaust device 100 is connected to a water vapor exhaust pipe 102, and the other end of the exhaust device 100 is connected to a water vapor introduction pipe 101, which extends to the upper position of the sterilization chamber 2. Figure 12 shown.

[0053] When this embodiment is in use, the storage rack is placed inside the sterilization chamber 2, and then the biological material to be sterilized is placed in the storage rack. By starting the lifting cylinder 5, the lifting rod 6 drives the outer cover seat 7 to descend vertically until the outer cover seat 7 is sleeved on the outside of the sterilizer body 1. At the same time, the inner cover seat 30 moves downward into the sterilization chamber 2, and the upper end of the sterilization chamber 2 is sealed by the annular sealing oil bag 51. During this process, the clamping heads 11 on the elastic clamping device 10 enter the outer grooves 20 respectively, and the clamping heads 11 slide along the curved outer surface of the upper semicircular table 23 using the lower cut surface 12, causing the clamping heads 11 to be recovered into the receiving groove 9, and causing the reset spring 15 to be compressed until the clamping heads 11 and the upper semicircular table 23 are separated. At this time, under the elastic force of the reset spring 15, the clamping heads 11 extend out of the receiving groove 9 and hit the bottom surface of the upper semicircular table 23, unable to move upward, forming a clamped state.

[0054] At this time, the electric heater 81 is operated to heat the pure water at the bottom of the sterilization chamber 2, forming a large amount of water vapor, and gradually increasing the internal pressure to form saturated steam for high-temperature sterilization of biological materials. The pressure of the water vapor acts upward on the pressure cover 31, so that several groups of pressure discs 33 move upward in the movable circular groove 32 under the action of air pressure (the connecting spring 34 is compressed), causing the driving block 35 to move along, using the extrusion surface 37 to squeeze the corresponding pressure-bearing inclined block 44, thereby causing the telescopic column 43 to move inward linearly, and the oil plug 45 squeezes the sealing oil in the hydraulic oil chamber 42. The sealing oil is injected into the annular sealing oil bag 51 through the oil pipe 48, and several groups of hydraulic regulators 40 evenly inject oil into the annular sealing oil bag 51 from different positions, causing the annular sealing oil bag 51 to expand evenly outward, thereby enhancing the contact force with the inner wall of the sterilization chamber 2 and improving the sealing performance.

[0055] Since the cold air in the sterilization chamber 2 has a low density, it will sink to the exhaust slit 71 position (the liquid level position at this time) by gravity, and continue to enter the interlayer cavity 70 from the exhaust slit 71 under the squeeze effect, continue to sink downward into the guide slope 73, and concentrate in the low-lying area, and finally gather in the air settling groove 74. At this time, the electromagnets 64 on the two sets of air receiving platforms 63 are activated to generate magnetic attraction on the bottom of the corresponding air settling groove 74, thereby causing the corrugated expansion part 62 at the lower end of the air-deflating sealing tube 60 to be vertically stretched, and the air receiving platform 63 extends into The air settles in the groove 74 and is adsorbed at the bottom of the groove. The cold air in the groove flows into the corrugated expansion part 62 through several groups of air inlets 65, and is then discharged upward from the air release sealing tube 60 through the air release valve 61. When the liquid level at the bottom of the sterilization chamber 2 drops as the pure water evaporates, the control valve on the L-shaped air transfer tube 72 is opened (the L-shaped air transfer tube 72 is at the liquid level at this time). Due to the pressure difference, the cold air remaining at the liquid level is injected into the lower position of the interlayer cavity 70 through the L-shaped air transfer tube 72, and finally discharged outward through the air release sealing tube 60.

[0056] After sterilization is completed, the exhaust device 100 is started, and the steam inside the sterilization chamber 2 is continuously sucked by the water vapor inlet pipe 101 and discharged to the outside through the water vapor exhaust pipe 102. At the same time, during the exhaust process, the air release valve 61 is opened to inhale air, and air is injected into the interlayer cavity 70 through the air release sealing tube 60 (at this time, the corrugated expansion part 62 is in a contracted state, and the air inlet 65 is at the height of the exhaust seam 71). The air enters the sterilization chamber 2 to balance the pressure difference.

[0057] Start the lifting cylinder 5 again, and the lifting rod 6 drives the outer cover seat 7 to descend vertically. During the descending process, the clamping head 11 uses the lower cut surface 12 to pass over the upper end blocking part of the lower semi-circular platform 27, and then fits into the outer side surface of the lower semi-circular platform 27. At this time, the lifting rod 6 drives the outer cover seat 7 to rise. During the rising process, the clamping head 11 pushes the lower semi-circular platform 27 upward due to the contact force between the two (the guide slider 26 on the movable shaft sleeve 24 slides upward in the strip slide groove 25) until the lower semi-circular platform 27 and the upper semi-circular platform 23 merge to form a transition arc surface for the clamping head 11 to pass over, so that the clamping head 11 leaves the outer slot 20 upward, and the outer cover seat 7 is unlocked.

[0058] Before the electric heater 81 works, the hydraulic cylinder 90 is started, the hydraulic rod 91 is lowered, and the horizontal part 84 of the electric heating wire 83 is pressed to the bottom of the fixing groove 85 by two sets of pressure plates 93 (the compression spring 96 is completely pressed into the spring receiving groove 95), thereby fixing the electric heating wire 83. When it is necessary to remove dirt from the electric heating wire 83, the hydraulic rod 91 is raised, the pressure plate 93 and the horizontal part 84 are separated, and under the elastic force of several sets of compression springs 96, the horizontal part 84 is lifted and contacts the vibrator 88 respectively. At this time, the vibrator 87 is started, and the two sets of vibrators 88 vibrate at a high frequency, acting on the horizontal part 84, and cooperating with the elastic vibration of the bottom compression spring 96, causing the entire electric heating wire 83 to vibrate in three dimensions, thereby more fully integrating with the descaling agent and accelerating the descaling speed.

[0059] Example 2 On the basis of the first embodiment, when the steam inside the sterilization chamber 2 is sucked, since the air injected into the sterilization chamber 2 through the air-deflating sealing tube 60 is room temperature cold air, it will drop in the sterilization chamber 2 and form a clear stratification with the high-temperature saturated steam, resulting in uneven local pressure in the room and increasing the difficulty of steam suction. In order to solve the above technical problems, we have the following design, such as Figure 17 shown.

[0060] Specifically, the water vapor inlet pipe 101 extends into the interior of the interlayer cavity 70, and a heat exchange tube 103 is fixed inside the interlayer cavity 70. A water vapor heat exchange cavity 104 is opened inside the heat exchange tube 103, and the water vapor heat exchange cavity 104 is for the degassing sealing tube 60 to pass through. The upper and lower ends of the heat exchange tube 103 are provided with second sliding sealing ports 105 for the movement of the degassing sealing tube 60, and sealing rings are provided in both groups of second sliding sealing ports 105.

[0061] The lower end of the heat exchange tube 103 is connected to the steam introduction pipe 101 , and the upper end of the heat exchange tube 103 is connected to a short exhaust pipe 106 , which extends toward the upper position in the sterilization chamber 2 .

[0062] When this embodiment is in use, the exhaust device 100 is started, and the exhaust short pipe 106 is used to suck the high-temperature steam into the water vapor heat exchange chamber 104 of the heat exchange tube 103 to flow, and is transferred outward through the water vapor inlet pipe 101 and the water vapor exhaust pipe 102 in turn. When the high-temperature steam flows in the water vapor heat exchange chamber 104, it will exchange heat with the room temperature cold air flowing downward in the air release sealing pipe 60. On the one hand, the high-temperature steam is effectively cooled down, and on the other hand, the room temperature cold air receives heat and is preheated to become hot air. The hot air can flow more evenly in the sterilization chamber 2, effectively balancing the indoor pressure difference.

[0063] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0064] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A vertical pressure steam sterilizer based on biomedical engineering, comprising a sterilizer body (1), characterized in that: A sterilization chamber (2) is vertically provided inside the sterilizer body (1), a top seat (4) is welded to the upper end of the support arm (3), a lifting cylinder (5) is vertically installed at the middle position of the upper end surface of the top seat (4), a lifting rod (6) is movably provided inside the lifting cylinder (5) and passes through the top seat (4) downward, and an outer cover seat (7) is welded to the lower end of the lifting rod (6); An inner cover seat (30) is fixedly provided at the middle position inside the outer cover seat (7), a pressure-bearing cover (31) is provided on the inner surface of the inner cover seat (30), a plurality of groups of movable circular grooves (32) are evenly provided on the edge of the pressure-bearing cover (31), a pressure disc (33) is movably provided in each group of the movable circular grooves (32), the upper end surface of the pressure disc (33) is fixed by a connecting spring (34) and the inner wall of the outer cover seat (7), a driving block (35) is connected to one side of the pressure disc (33), and an extrusion surface (37) is provided at the end of the driving block (35) away from the pressure disc (33); Each group of the extrusion surfaces (37) acts on a hydraulic regulator (40) respectively. The hydraulic regulator (40) includes an adjusting cylinder (41), a hydraulic oil chamber (42), an oil hole (47) and an oil pipe (48). The adjusting cylinder (41) is provided with a hydraulic oil chamber (42). An end of the hydraulic oil chamber (42) away from the telescopic column (43) is provided with an oil hole (47). An outwardly extending oil pipe (48) is installed on the oil hole (47). The oil pipe (48) on each group of the hydraulic regulator (40) is connected to the inner side surface of the oil bag positioning sleeve (50). An annular sealing oil bag (51) is installed inside the oil bag positioning sleeve (50). A portion of the annular sealing oil bag (51) extends outward from the outer side surface of the inner cover seat (30). The annular sealing oil bag (51) acts on the inner wall position of the upper end of the sterilization chamber (2).

2. The vertical pressure steam sterilizer based on biomedical engineering according to claim 1, characterized in that: Support arms (3) are symmetrically and vertically arranged on both sides of the sterilizer body (1); the lower end surface of the top seat (4) of the outer cover seat (7) is riveted with a limiting sleeve (8) that acts on the outer cover seat (7); the inner cover seat (30) moves downward into the sterilization chamber (2); and the inner side surface of the inner cover seat (30) is provided with a guide groove (36) for the movement of the driving block (35).

3. The vertical pressure steam sterilizer based on biomedical engineering according to claim 2, characterized in that: The hydraulic regulator (40) further includes a telescopic column (43), a pressure-bearing inclined block (44), an oil plug (45) and a spring (46). The regulating cylinder (41) is horizontally fixed inside the inner cover seat (30). The telescopic column (43) is inserted into the hydraulic oil chamber (42). The end of the telescopic column (43) extending out of the hydraulic oil chamber (42) is fixed with a pressure-bearing inclined block (44). The pressure-bearing inclined block (44) and the corresponding extrusion surface (37) act on each other. An oil plug (45) fixed to the telescopic column (43) is slidably provided in the hydraulic oil chamber (42). A spring (46) sleeved on the outside of the telescopic column (43) is fixed between the oil plug (45) and the inner wall of the regulating cylinder (41).

4. The vertical pressure steam sterilizer based on biomedical engineering according to claim 3, characterized in that: The inner side surface of the top seat (4) is evenly provided with a plurality of groups of receiving grooves (9), and an elastic retainer (10) is movably provided inside the receiving groove (9). The elastic retainer (10) includes a clamping head (11), a lower cut surface (12), a spring column (13), a positioning piece (14) and a return spring (15). The clamping head (11) is located in the receiving groove (9), and one end of the clamping head (11) is provided with a lower cut surface (12). The other end of the clamping head (11) is connected to the spring column (13), and the spring column (13) is located in the inner column groove. A return spring (15) is provided between the inner column groove and the clamping head (11) and is sleeved on the outside of the spring column (13). One end of the spring column (13) passing through the inner column groove is provided with a positioning piece (14).

5. The vertical pressure steam sterilizer based on biomedical engineering according to claim 4, characterized in that: The upper end edge of the sterilizer body (1) is evenly provided with a plurality of groups of external slots (20) corresponding to the elastic retainer (10), a positioning shaft (21) is vertically fixed in the external slot (20), the upper end of the positioning shaft (21) is provided with a fixed sleeve (22), the outer side of the fixed sleeve (22) is connected to an upper semicircular table (23), a movable sleeve (24) is movably provided in the middle of the positioning shaft (21), a strip-shaped slide groove (25) is vertically provided on the outer side surface of the positioning shaft (21), a guide slider (26) extending into the strip-shaped slide groove (25) is fixed inside the movable sleeve (24), and a lower semicircular table (27) is connected to the outer side of the movable sleeve (24), the upper semicircular table (23) and the lower semicircular table (27) are symmetrically distributed and both interact with the lower cut surface (12).

6. The vertical pressure steam sterilizer based on biomedical engineering according to claim 5, characterized in that: Two groups of air release sealing tubes (60) are symmetrically installed inside the outer cover seat (7), and an air release valve (61) is installed at the upper end of the air release sealing tube (60). The upper end surface of the sterilizer body (1) is provided with a first sliding sealing port (75) for the movement of the air release sealing tube (60). The lower end of the air release sealing tube (60) is connected to a bellows expansion part (62), and an air receiving platform (63) is installed at the lower end of the bellows expansion part (62). An electromagnet (64) is provided in the middle of the air receiving platform (63), and a plurality of groups of air receiving ports (65) connected to the bellows expansion part (62) are evenly opened on the edge of the air receiving platform (63).

7. The vertical pressure steam sterilizer based on biomedical engineering according to claim 6, characterized in that: An interlayer cavity (70) is provided inside the sterilizer body (1) and on the outer side of the sterilization chamber (2), and an air release sealing tube (60) is movably provided inside the interlayer cavity (70). A plurality of exhaust slits (71) connected to the interlayer cavity (70) are evenly provided on the inner wall of the sterilization chamber (2). An L-shaped air transfer pipe (72) is installed in the middle of the exhaust slit (71), and a control valve is installed in the L-shaped air transfer pipe (72). The lower end of the L-shaped air transfer pipe (72) is located at a lower position inside the interlayer cavity (70). A guide slope (73) is provided at the lower end of the inner part of the interlayer cavity (70), and the guide slope (73) is inclined downward. An air settling groove (74) is provided at the lowest position of the guide slope (74), and the air settling groove (74) is larger at the top and smaller at the bottom. The air receiving platform (63) extends into the air settling groove (74) during the downward movement.

8. The vertical pressure steam sterilizer based on biomedical engineering according to claim 7, characterized in that: A heating seat (80) is installed on the inner wall of the sterilization chamber (2) and above the exhaust slit (71). An electric heater (81) is fixedly installed inside the heating seat (80). Two groups of movable holes (82) for the movement of power supply heating wires (83) are symmetrically opened on the electric heater (81). The electric heating wire (83) includes two groups of horizontal parts (84). Two groups of fixed grooves (85) for the horizontal parts (84) to pass through are symmetrically opened inside the heating seat (80). A partition (86) is provided between the two groups of fixed grooves (85). A vibrator (87) is installed in the middle of the partition (86). The vibrator (87) is provided with two groups of vibrators (88) that act on the horizontal parts (84) respectively.

9. The vertical pressure steam sterilizer based on biomedical engineering according to claim 8, characterized in that A hydraulic cylinder (90) is vertically provided on the upper end surface of the heating seat (80), and a hydraulic rod (91) is provided inside the hydraulic cylinder (90) for downward movement. A pressure seat (92) is welded to the lower end of the hydraulic rod (91), and two groups of pressure plates (93) are symmetrically fixed to the lower end of the pressure seat (92). The lower end of the pressure plate (93) is provided with a curved fixing surface (94) that acts on the horizontal part (84). A plurality of groups of spring receiving grooves (95) are equidistantly provided at the bottom of the fixing groove (85), and a compression spring (96) is installed in each group of the spring receiving grooves (95). The upper end of the compression spring (96) is welded with a curved insulating sleeve (97) that acts on the lower end of the horizontal part (84).

10. The vertical pressure steam sterilizer based on biomedical engineering according to claim 7, characterized in that: An exhaust device (100) is provided on the outside of the sterilizer body (1), one end of the exhaust device (100) is connected to a water vapor exhaust pipe (102), and the other end of the exhaust device (100) is connected to a water vapor introduction pipe (101), and the water vapor introduction pipe (101) extends into the interior of the interlayer cavity (70), and a heat exchange tube (103) is fixed inside the interlayer cavity (70), and a water vapor heat exchange cavity is opened inside the heat exchange tube (103). (104), the water vapor heat exchange chamber (104) is for the air release sealing tube (60) to pass through, and the upper and lower ends of the heat exchange tube (103) are provided with a second sliding sealing port (105) for the air release sealing tube (60) to move, the lower end of the heat exchange tube (103) is connected to the water vapor inlet tube (101), and the upper end of the heat exchange tube (103) is connected to the short exhaust pipe (106), and the short exhaust pipe (106) extends to the upper position inside the sterilization chamber (2).

Images