阅读说明：本技术 人体可吸收医用针织物的清洗方法及循环冲洗清洗系统 (Cleaning method and circular washing and cleaning system for human body absorbable medical knitted fabric ) 是由 郑小佳 郑云波 朱晓鑫 吴维炜 李军 陈志鹏 于 2021-09-30 设计创作，主要内容包括：本发明涉及一种人体可吸收医用针织物的清洗方法及循环冲洗清洗系统,系统包括真空单元、蒸馏单元、清洗单元及冷凝单元,方法包括：加热；清洗试剂蒸发并冷凝滴入清洗器,当清洗试剂浸没针织物后进行循环冲洗；当液面高于倒U型回流管回流高点时,清洗试剂及污染物回流至蒸馏单元；连续反复上述操作1-5次；使清洗试剂回收至试剂回收瓶内；回收完成后,关闭冷凝单元,保持真空单元作用以使残留试剂吸收至真空单元；关闭蒸馏单元、恒流泵和真空单元。本发明所用清洗试剂较少,可高效除去医用针织物在生产过程中产生的污染物,避免人工清洗对医用针织物的结构破坏,有效保持医用针织物的物理性能,并实现清洗试剂回收循环和织物干燥,清洗过程安全、经济环保。(The invention relates to a cleaning method and a circulating washing and cleaning system for medical knitted fabrics absorbable by human bodies, wherein the system comprises a vacuum unit, a distillation unit, a cleaning unit and a condensation unit, and the method comprises the following steps: heating; the cleaning reagent is evaporated and condensed and dropped into the cleaner, and circular washing is carried out after the knitted fabric is immersed in the cleaning reagent; when the liquid level is higher than the reflux high point of the inverted U-shaped reflux pipe, the cleaning reagent and the pollutants reflux to the distillation unit; continuously repeating the above operations for 1-5 times; recovering the cleaning reagent into a reagent recovery bottle; after recovery is completed, closing the condensing unit, and keeping the action of the vacuum unit to enable the residual reagent to be absorbed to the vacuum unit; the distillation unit, constant flow pump and vacuum unit are shut down. The invention uses less cleaning reagent, can efficiently remove the pollutants generated in the production process of the medical knitted fabric, avoids the structural damage of the medical knitted fabric caused by manual cleaning, effectively keeps the physical performance of the medical knitted fabric, realizes the recycling of the cleaning reagent and the drying of the knitted fabric, and has safe, economic and environment-friendly cleaning process.)

1. The circulation washing cleaning system of human absorbable medical knitted fabric, its characterized in that: this cleaning system is washed in circulation includes vacuum unit, distillation unit, cleaning unit and condensation unit, the vacuum unit is linked together with the condensation unit, the condensation unit intercommunication sets up at the cleaning unit top, the cleaning unit includes the purger, arranges the inside supporter of purger in and the circulation bypass that sets up and the recovery branch road that sets up with circulation bypass intercommunication in, combine the constant flow pump on the circulation bypass, it has reagent recovery bottle to combine on the recovery branch road, the purger top is linked together with the distillation unit through the vapour pipe, the purger bottom is linked together with the distillation unit through the type of falling U back flow, just the backward flow high point of the type of falling U back flow is adjustable.

2. The system according to claim 1, wherein the circular washing and cleaning system comprises: the vacuum unit comprises a vacuum pipe, a vacuum pump and an escape absorber, one end of the vacuum pipe is communicated to the top of the condensation unit, the other end of the vacuum pipe is connected to the vacuum pump, and the escape absorber is communicated with one end of the vacuum pipe, which is close to the vacuum pump.

3. The system according to claim 1, wherein the circular washing and cleaning system comprises: the distillation unit includes heating bath, mounting bracket, four-way connection ware and revolves the steam bottle, the heating bath is installed on the mounting bracket, revolve the steam bottle and rotate to set up on the mounting bracket and its one end stretches into in the heating bath, four-way connection ware's first end with revolve the steam bottle and communicate mutually and the liquid feeding valve is installed to the second end, steam conduit and the type of falling U back flow are connected respectively to four-way connection ware's other both ends.

4. The system according to claim 1, wherein the circular washing and cleaning system comprises: the rack is fully distributed with the leakage holes.

5. The system according to claim 1, wherein the circular washing and cleaning system comprises: one end of the circulation bypass is communicated to the position, higher than the commodity shelf, of the cleaning device, the other end of the circulation bypass is communicated to the bottom of the cleaning device through the constant flow pump, two ends of the recovery branch are communicated to the circulation bypass respectively, recovery valves are arranged on the recovery branches on two sides of the reagent recovery bottle respectively, and a control valve is arranged on the circulation bypass between two ends of the recovery branch.

6. The system according to claim 5, wherein the circular washing and cleaning system comprises: the bottom of the cleaner is detachably provided with a quick-opening three-way cover, a first channel of the quick-opening three-way cover is communicated with the inside of the cleaner, a second channel of the quick-opening three-way cover is connected with one end of an inverted U-shaped return pipe, and a third channel of the quick-opening three-way cover is connected with the other end of the circulation bypass.

7. The cleaning method of the medical knitted fabric capable of being absorbed by human bodies is characterized by comprising the following steps: the method comprises the following specific steps:

s10, placing the medical knitted fabric to be cleaned on a shelf of the circulation washing and cleaning system as claimed in any one of claims 1 to 6, adding a cleaning reagent into the distillation unit, starting the distillation unit, the vacuum unit and the condensation unit, and heating to the boiling point or above of the cleaning reagent, wherein the boiling point of the cleaning reagent is lower than that of water;

s20, evaporating and condensing the cleaning reagent and dripping the cleaning reagent into the cleaner, starting a constant flow pump, conducting a circulation bypass and closing a recovery branch when the cleaning reagent in the cleaner completely submerges the medical knitted fabric, and circularly washing the medical knitted fabric;

s30, when the liquid level of the cleaning reagent in the cleaner is higher than the reflux high point of the inverted U-shaped reflux pipe, closing the constant flow pump, and enabling the cleaning reagent in the cleaner and the pollutants on the medical knitted fabric to flow back to the distillation unit along the inverted U-shaped reflux pipe;

s40, repeating the steps S20-S30 for 1-5 times;

s50, opening the constant flow pump, conducting the recovery branch and blocking the circulation bypass part between the two ends of the recovery branch, so that the cleaning reagent in the cleaner is recovered into the reagent recovery bottle;

s60, after the recovery of the cleaning reagent is finished, closing the condensing unit, and keeping the vacuum unit to act for a certain time to enable the residual reagent to be absorbed to the vacuum unit;

and S70, closing the distillation unit, the constant flow pump and the vacuum unit, and taking out the clean and dry medical knitted fabric.

8. The method of cleaning a human absorbable medical knit fabric of claim 7, wherein: the cleaning reagent is one or a mixture of more of medical grade ethanol, ether, acetone, ethyl acetate and dichloromethane, the purity of the cleaning reagent is more than or equal to 90%, and the ratio of the volume of the cleaning reagent to the mass of the medical knitted fabric is 10-30ml:1 g.

9. The method of cleaning a human absorbable medical knit fabric of claim 7, wherein: the rotating speed of the distillation unit is 20-110 rpm; the temperature of the condensate of the condensing unit is-16-8 ℃, and the circulation speed of the condensate is 6-10L/min; the circulating flushing speed of the constant flow pump is 1L/min-4L/min.

10. The method of cleaning a human absorbable medical knit fabric of claim 7, wherein: the medical knitted fabric is knitted by one or more of polyglycolide, polylactide, polyglycolide, polycaprolactone, polylactic acid, polydioxanone and chitosan fiber.

Technical Field

The invention belongs to the technical field of new biomedical textile materials, and particularly relates to a cleaning method and a circular washing and cleaning system for a medical knitted fabric capable of being absorbed by a human body.

Background

During the production process of the medical knitted fabric, a human body can absorb pollutants such as oil, short fibers, particles and the like in equipment and the environment. If the contaminants on the medical knitted fabric are not cleaned, the actual clinical application of the medical knitted fabric is seriously influenced. The conventional cleaning method for the medical knitted fabric comprises the following steps: in an open environment, the medical knitted fabric is cleaned by manually stirring, rubbing, soaking and the like by using a reagent. Although the method can remove the pollutants on the medical knitted fabric, the method still has a series of problems. Firstly, more cleaning reagents are needed, and pollutants are not completely cleaned; secondly, the reagent is volatile in the environment, so that the safety risk exists; thirdly, the mesh shape and uniformity of the medical knitted fabric are easily damaged by manual stirring and kneading; fourthly, the reagent with lower water content has stronger water absorption and is easy to absorb water vapor in the air, thereby influencing the cleaning effect; fifthly, the labor investment is large, the cleaning efficiency is low, and the solvent recovery treatment is troublesome. Therefore, it is important to research and search a proper and efficient cleaning method for the human body absorbable medical knitted fabric.

Disclosure of Invention

In view of the defects of the prior art, the technical problem to be solved by the invention is to provide a cleaning method and a circular washing and cleaning system for medical knitted fabrics capable of being absorbed by human bodies, the used cleaning reagents are less, pollutants generated in the production process of the medical knitted fabrics can be efficiently removed, the structural damage of the medical knitted fabrics caused by manual cleaning is avoided, the physical properties of the medical knitted fabrics are effectively maintained, the recycling and cyclic utilization of the cleaning reagents and the drying of the medical knitted fabrics are realized, and the cleaning process is safe, economic and environment-friendly.

In order to solve the technical problems, the invention adopts the technical scheme that:

human circulation that can absorb medical knitted fabric washes cleaning system, including vacuum unit, distillation unit, cleaning unit and condensation unit, vacuum unit is linked together with the condensation unit, the condensation unit intercommunication sets up at the cleaning unit top, the cleaning unit includes the purger, arranges the inside supporter of purger in and the circulation bypass that sets up and the recovery branch road that sets up with circulation bypass intercommunication in the purger, the circulation bypass is last to be combined with the constant flow pump, it has reagent recovery bottle to combine on the recovery branch road, the purger top is linked together with the distillation unit through the steam pipe, the purger bottom is linked together with the distillation unit through the type of falling U back flow, just the backward flow high point of type of falling U back flow is adjustable.

Preferably, the vacuum unit comprises a vacuum pipe, a vacuum pump and an escape absorber, wherein one end of the vacuum pipe is communicated to the top of the condensation unit, the other end of the vacuum pipe is connected to the vacuum pump, and the escape absorber is communicated with one end of the vacuum pipe close to the vacuum pump.

Preferably, the distillation unit includes heating bath, mounting bracket, four-way connection ware and revolves the steam bottle, the heating bath is installed on the mounting bracket, revolve the steam bottle and rotate to set up on the mounting bracket and its one end stretches into in the heating bath, four-way connection ware's first end with revolve the steam bottle and communicate mutually and the liquid feeding valve is installed to the second end, vapor pipe and the type of falling U back flow are connected respectively to four-way connection ware's other both ends.

Preferably, the rack is full of the leakage holes.

Preferably, one end of the circulation bypass is communicated to the position, higher than the storage rack, of the cleaning device, the other end of the circulation bypass is communicated to the bottom of the cleaning device through the constant flow pump, two ends of the recovery branch are respectively communicated to the circulation bypass, recovery valves are respectively arranged on the recovery branches on two sides of the reagent recovery bottle, and a control valve is arranged on the circulation bypass between two ends of the recovery branch.

Preferably, a quick-opening three-way cover is detachably mounted at the bottom of the cleaner, a first channel of the quick-opening three-way cover is communicated with the inside of the cleaner, a second channel of the quick-opening three-way cover is connected with one end of the inverted U-shaped return pipe, and a third channel of the quick-opening three-way cover is connected with the other end of the circulation bypass.

The invention also provides a cleaning method of the human body absorbable medical knitted fabric, which comprises the following specific steps:

s10, placing the medical knitted fabric to be cleaned on a shelf of a circulating washing system, adding a cleaning reagent into a distillation unit, starting the distillation unit, a vacuum unit and a condensation unit, and heating to the boiling point or above of the cleaning reagent, wherein the boiling point of the cleaning reagent is lower than that of water;

s20, evaporating and condensing the cleaning reagent and dripping the cleaning reagent into the cleaner, starting a constant flow pump, conducting a circulation bypass and closing a recovery branch when the cleaning reagent in the cleaner completely submerges the medical knitted fabric, and circularly washing the medical knitted fabric;

s30, when the liquid level of the cleaning reagent in the cleaner is higher than the reflux high point of the inverted U-shaped reflux pipe, closing the constant flow pump, and enabling the cleaning reagent in the cleaner and the pollutants on the medical knitted fabric to flow back to the distillation unit along the inverted U-shaped reflux pipe;

s40, repeating the steps S20-S30 for 1-5 times;

s50, opening the constant flow pump, conducting the recovery branch and blocking the circulation bypass part between the two ends of the recovery branch, so that the cleaning reagent in the cleaner is recovered into the reagent recovery bottle;

s60, after the recovery of the cleaning reagent is finished, closing the condensing unit, keeping the vacuum unit to continuously act for a certain time, and continuously maintaining for 10-20 min to enable the residual reagent to be absorbed to the vacuum unit after no visible liquid exists in the cleaning system;

and S70, closing the distillation unit, the constant flow pump and the vacuum unit, and taking out the clean and dry medical knitted fabric.

Preferably, the cleaning reagent is one or a mixture of more of medical grade ethanol, diethyl ether, acetone, ethyl acetate and dichloromethane, the purity of the cleaning reagent is more than or equal to 90%, and the ratio of the volume of the cleaning reagent to the mass of the medical knitted fabric is 10-30ml:1 g. The high reflux point of the inverted U-shaped reflux pipe is at the same height with the position of 80-90% of the volume of the cleaner.

Preferably, the rotation speed of the distillation unit is 20 rpm-110 rpm; the temperature of the condensate of the condensing unit is-16-8 ℃, and the circulation speed of the condensate is 6-10L/min; the circulating flushing speed of the constant flow pump is 1L/min-4L/min.

Preferably, the medical knitted fabric is a knitted fabric formed by knitting one or more of polyglycolide, polylactide, polyglycolide, polycaprolactone, polylactic acid, polydioxanone and chitosan fibers.

Compared with the prior art, the invention has the following beneficial effects:

1. the circulation washing and cleaning system comprises the cleaning unit, the distillation unit, the condensation unit and the vacuum unit, a closed cleaning environment can be provided, the cleaning reagent which possibly escapes is prevented and absorbed by an escape absorber of the vacuum unit, the leakage risk of the cleaning reagent is greatly reduced, the recovery rate is obviously improved, water vapor in the external environment cannot enter the cleaning equipment, and the water content of the cleaning reagent and the water content of the medical knitted fabric which can be absorbed by a cleaned human body are effectively reduced.

2. The invention realizes three operations of cleaning, drying and cleaning reagent recovery of the medical knitted fabric which can be absorbed by human body in one process flow, when the solution in the cleaner is higher than the inverted U-shaped return pipe, the cleaning solution containing impurities automatically returns to the distillation unit and keeps the pollutants on the medical knitted fabric in the distillation unit, and then the cleaning reagent with high purity returns to the cleaner through distillation purification and condensation of the snake-shaped condensation pipe, so the use efficiency and the cleaning efficiency of the cleaning reagent are greatly improved; in addition, under the action of the constant flow pump and the cleaner, the cleaning reagent can directionally and circularly flow through the human body absorbable medical knitted fabric in the storage rack, so that the low-tension washing and cleaning of the human body absorbable medical knitted fabric by the cleaning reagent is realized, the using amount of the cleaning reagent is reduced, and the mesh shape and uniformity of the human body absorbable medical knitted fabric are kept, so that the structural damage of manual cleaning on the medical knitted fabric is avoided. And then the recovery of the cleaning reagent is realized through a constant flow pump and a recovery branch, and the vacuum drying of the medical knitted fabric is realized through the vacuum action after the recovery.

Meanwhile, the cleaning system is in a vacuum state in the cleaning process, the purity of the cleaning reagent is high, the influence of air and moisture on the degradation of the medical knitted fabric can be greatly inhibited, and the physical performance of the medical knitted fabric is effectively maintained. The used cleaning reagent is less, and the whole cleaning process is safe, economic and environment-friendly.

Drawings

FIG. 1 is a schematic structural diagram of a circulating flushing and cleaning device of the present invention.

FIG. 2 is a schematic view of the structure of the cleaning unit of the present invention.

Detailed Description

The present invention is described in further detail below by way of specific embodiments, but those skilled in the art will appreciate that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention.

Example 1

The embodiment provides a cleaning method of a medical knitted fabric absorbable by a human body, the medical knitted fabric is a warp plain tissue structure and is formed by weaving mixed yarns of polyglycolide and polylactide, the blending ratio of the polyglycolide to the polylactide is 50:50, and the cleaning method specifically comprises the following steps:

s10, placing the medical knitted fabric to be cleaned on a storage rack 220 of a circulating flushing and cleaning system, taking medical grade ethanol with the purity of 95% as a cleaning reagent, adding the cleaning reagent into a rotary evaporation bottle of a distillation unit 100, wherein the ratio of the volume of the cleaning reagent to the mass of the medical knitted fabric is 10ml:1g, adjusting the backflow high point of an inverted U-shaped backflow pipe 160 to be at the same height with the position of 80% of the volume of a cleaner 210, setting the rotating speed of the rotary evaporation bottle of the distillation unit 100 to be 30rpm, the temperature of condensate of a circulating cold trap of a condensation unit 300 to be minus 10 ℃, the circulating speed of the condensate to be 7/min, and the circulating flushing speed of a constant flow pump 230 to be 1.5L/min, starting the distillation unit 100, the vacuum unit 400 and the condensation unit 300, heating to the boiling point of the cleaning reagent, and the boiling point of the cleaning reagent to be lower than the boiling point of water;

s20, evaporating and condensing the cleaning reagent and dripping the cleaning reagent into the cleaner 210, starting the constant flow pump 230 after the cleaning reagent in the cleaner 210 completely submerges the medical knitted fabric, conducting the circulation bypass and closing the recovery branch, and circularly washing the medical knitted fabric;

s30, when the liquid level of the cleaning reagent in the cleaner 210 is higher than the reflux high point of the inverted U-shaped reflux pipe 160, closing the constant flow pump 230, and enabling the cleaning reagent in the cleaner 210 and the pollutants on the medical knitted fabrics to flow back to the rotary steaming bottle of the distillation unit 100 along the inverted U-shaped reflux pipe 160;

s40, continuously repeating the steps S20-S30 for 2 times;

s50, opening the constant flow pump 230, conducting the recovery branch and blocking the circulation bypass part between the two ends of the recovery branch, so that the cleaning reagent in the cleaner 210 is recovered into the reagent recovery bottle 240;

s60, after the recovery of the cleaning reagent is finished, closing the condensation unit 300, keeping the vacuum unit 400 to continue acting, and when no visible liquid exists in the cleaning system, continuing maintaining for 15min to enable the residual reagent to be absorbed to the vacuum unit 400, wherein the medical knitted fabric and the residual reagent in the cleaning system are completely absorbed by the escape absorption tower;

and S70, closing the distillation unit 100, the constant flow pump 230 and the vacuum unit 400, and taking out the clean and dry medical knitted fabric.

Example 2

The embodiment provides a cleaning method of a human body absorbable medical knitted fabric, the medical knitted fabric is a knitted chain weft insertion structure and is formed by knitting poly (glycolide-lactide) yarns, and the cleaning method specifically comprises the following steps:

s10, placing the medical knitted fabric to be cleaned on a storage rack 220 of the circulating washing system, the mixed solution of medical grade diethyl ether and acetone with the purity of 97 percent (the volume ratio of the diethyl ether to the acetone is 1:1) is taken as a cleaning reagent and added into a rotary evaporation bottle of a distillation unit 100, and the ratio of the volume of the cleaning reagent to the mass of the medical knitted fabric is 20ml:1g, adjusting the reflux high point of the inverted U-shaped reflux pipe 160 to be at the same height with the position of 90% of the volume of the cleaner 210, setting the rotating speed of a rotary evaporation bottle of the distillation unit 100 to be 50rpm, the temperature of a condensate of a circulating cold trap of the condensation unit 300 to be minus 5 ℃, the circulating speed of the condensate to be 8/min, and the circulating flushing speed of the constant flow pump 230 to be 2L/min, starting the distillation unit 100, the vacuum unit 400 and the condensation unit 300, and heating to the boiling point of a cleaning reagent, wherein the boiling point of the cleaning reagent is lower than that of water;

s20, evaporating and condensing the cleaning reagent and dripping the cleaning reagent into the cleaner 210, starting the constant flow pump 230 after the cleaning reagent in the cleaner 210 completely submerges the medical knitted fabric, conducting the circulation bypass and closing the recovery branch, and circularly washing the medical knitted fabric;

s30, when the liquid level of the cleaning reagent in the cleaner 210 is higher than the reflux high point of the inverted U-shaped reflux pipe 160, closing the constant flow pump 230, and enabling the cleaning reagent in the cleaner 210 and the pollutants on the medical knitted fabrics to flow back to the rotary steaming bottle of the distillation unit 100 along the inverted U-shaped reflux pipe 160;

s40, repeating the above steps S20-S30 for 3 times;

s50, opening the constant flow pump 230, conducting the recovery branch and blocking the circulation bypass part between the two ends of the recovery branch, so that the cleaning reagent in the cleaner 210 is recovered into the reagent recovery bottle 240;

s60, after the recovery of the cleaning reagent is finished, closing the condensation unit 300, keeping the vacuum unit 400 to continue acting, and when no visible liquid exists in the cleaning system, continuing to maintain for 20min to enable the residual reagent to be absorbed to the vacuum unit 400, so that the medical knitted fabric and the residual reagent in the cleaning system are completely absorbed by the escape absorption tower;

and S70, closing the distillation unit 100, the constant flow pump 230 and the vacuum unit 400, and taking out the clean and dry medical knitted fabric.

Example 3

The embodiment provides a cleaning method of a medical knitted fabric capable of being absorbed by a human body, the medical knitted fabric is of a warp-flat structure and is formed by weaving mixed yarns of polycaprolactone, polylactic acid, polydioxanone and chitosan, the blending ratio of the polycaprolactone, the polylactic acid, the polydioxanone and the chitosan is 30:20:20:30, and the cleaning method specifically comprises the following steps:

s10, placing the medical knitted fabric to be cleaned on a storage rack 220 of the circulating washing system, a 98% mixed solution of medical ethyl acetate and dichloromethane (the volume ratio of ethyl acetate to dichloromethane is 2:1) is used as a cleaning reagent and added into a rotary evaporation bottle of a distillation unit 100, and the ratio of the volume of the cleaning reagent to the mass of the medical knitted fabric is 30ml:1g, adjusting the reflux high point of the inverted U-shaped reflux pipe 160 to be at the same height with the position of 80% of the volume of the cleaner 210, setting the rotating speed of a rotary evaporation bottle of the distillation unit 100 to be 55rpm, the temperature of a condensate of a circulating cold trap of the condensation unit 300 to be 2 ℃ below zero, the circulating speed of the condensate to be 7.2/min, and the circulating flushing speed of the constant flow pump 230 to be 2.5L/min, starting the distillation unit 100, the vacuum unit 400 and the condensation unit 300, and heating to the boiling point of a cleaning reagent, wherein the boiling point of the cleaning reagent is lower than that of water;

s20, evaporating and condensing the cleaning reagent and dripping the cleaning reagent into the cleaner 210, starting the constant flow pump 230 after the cleaning reagent in the cleaner 210 completely submerges the medical knitted fabric, conducting the circulation bypass and closing the recovery branch, and circularly washing the medical knitted fabric;

s30, when the liquid level of the cleaning reagent in the cleaner 210 is higher than the reflux high point of the inverted U-shaped reflux pipe 160, closing the constant flow pump 230, and enabling the cleaning reagent in the cleaner 210 and the pollutants on the medical knitted fabrics to flow back to the rotary steaming bottle of the distillation unit 100 along the inverted U-shaped reflux pipe 160;

s40, repeating the above steps S20-S30 for 3 times;

s50, opening the constant flow pump 230, conducting the recovery branch and blocking the circulation bypass part between the two ends of the recovery branch, so that the cleaning reagent in the cleaner 210 is recovered into the reagent recovery bottle 240;

s60, after the recovery of the cleaning reagent is finished, closing the condensation unit 300, keeping the vacuum unit 400 to continue acting, and when no visible liquid exists in the cleaning system, continuing maintaining for 10min to enable the residual reagent to be absorbed to the vacuum unit 400, wherein the medical knitted fabric and the residual reagent in the cleaning system are completely absorbed by the escape absorption tower;

and S70, closing the distillation unit 100, the constant flow pump 230 and the vacuum unit 400, and taking out the clean and dry medical knitted fabric.

The above-mentioned embodiments 1 to 3 use the same circulating flushing and cleaning apparatus, which includes a vacuum unit 400, a distillation unit 100, a cleaning unit 200, and a condensing unit 300.

The vacuum unit 400 is in communication with the condensing unit 300, wherein: the condensing unit 300 includes a serpentine condenser tube and a circulating cold trap, and both ends of the serpentine condenser tube are respectively communicated to the circulating cold trap through cold circulating tubes. The vacuum unit 400 comprises a vacuum tube, a vacuum pump and an escape absorber, wherein one end of the vacuum tube is communicated to the top of the snakelike condensation tube, the other end of the vacuum tube is connected to the vacuum pump, and the escape absorber is communicated with one end of the vacuum tube, which is close to the vacuum pump. The vacuum pump is a water circulation vacuum pump, and the vacuum unit 400 is used for vacuumizing to 100-400Pa vacuum degree, so that the following effects can be achieved: the boiling point of the solvent is reduced, and the influence of the temperature on the cleaned objects is reduced; reagent steam is guided to enter the condensing unit, so that the rotary evaporation efficiency is improved; oxygen in the equipment is removed, and the explosion risk of the solvent is reduced; air is blocked, the cleaning solvent is prevented from absorbing water, and the quality is poor.

Wherein: distillation unit 100 includes heating bath, mounting bracket, four-way connection ware and revolves the steam bottle, the heating bath is installed on the mounting bracket, revolve the steam bottle and rotate to set up on the mounting bracket and its one end stretches into in the heating bath, four-way connection ware's first end with revolve the steam bottle and communicate mutually and the liquid feeding valve is installed to the second end. Cleaning unit 200 includes purger 210, arranges the inside supporter 220 of purger 210 in, be covered with the small opening on the supporter 220, purger 210 top is linked together through steam pipe 150 and distillation unit 100's four-way connection ware, the snakelike condenser pipe intercommunication of condensing unit 300 sets up at cleaning unit 200's purger 210 top, and more than heating to the boiling point or the boiling point of cleaning agent, inside cleaning agent evaporation sent to purger 210 through steam pipe 150, rise to the snakelike condenser intraductal condensation drippage that takes place of purger 210 again.

The bottom of the cleaner 210 is communicated with the four-way connector of the distillation unit 100 through the inverted U-shaped return pipe 160, according to the principle of a communicating device, the liquid level inside the inverted U-shaped return pipe 160 is kept consistent with the liquid level of the cleaning reagent inside the cleaner 210, and when the liquid level of the cleaning reagent inside the cleaner 210 is higher than the return high point of the inverted U-shaped return pipe 160, the cleaning reagent inside the cleaner 210 and the pollutants on the medical knitted fabrics flow back to the rotary evaporation bottle of the distillation unit 100 along the inverted U-shaped return pipe 160. Moreover, the backflow high point of the inverted U-shaped backflow pipe 160 is adjustable, the backflow high point can be adjusted according to actual requirements, and the liquid inlet end of the inverted U-shaped backflow pipe 160 is higher than the liquid outlet end of the inverted U-shaped backflow pipe 160.

As shown in fig. 2, the cleaning unit 200 further includes a circulation bypass connected to the cleaning unit 210 and a recovery branch connected to the circulation bypass 232, the circulation bypass being connected to the constant-current pump 230, and the recovery branch being connected to the reagent recovery bottle 240. One end of the circulation bypass 230 is communicated to the position of the cleaner 210 higher than the rack 220, the other end of the circulation bypass is communicated to the bottom of the cleaner 210 through the constant flow pump 230, two ends of the recovery branch are respectively communicated to the circulation bypass, the recovery branches at two sides of the reagent recovery bottle 240 are respectively provided with a recovery valve 241, 242, and the circulation bypass between the two ends of the recovery branch is provided with a control valve 243. After the cleaning agent in the cleaning device 210 completely immerses the medical knitted fabric, the constant flow pump 230 is started, the circulation bypass is conducted, and the recovery branch is closed, so that the medical knitted fabric is circularly washed. The control valve 243 is opened and the two recovery valves 241, 242 are closed, i.e. the bypass of the conducting circuit is achieved and the recovery branch is closed. The control valve 243 is closed, and the two recovery valves 241 and 242 are opened, so that the recovery branch is conducted and the circulation bypass part between the two ends of the recovery branch is blocked, and at the moment, the cleaning reagent in the cleaner 210 can be recovered into the reagent recovery bottle 240; the cleaning reagent in the rotary evaporation bottle can be recovered into the reagent recovery bottle 240 because the distillation is still maintained.

In order to facilitate assembly and taking and placing of medical knitted fabrics, a quick-opening three-way cover 211 is detachably mounted at the bottom of the cleaner 210, a first channel of the quick-opening three-way cover 211 is communicated with the inside of the cleaner 210, a second channel of the quick-opening three-way cover 211 is connected with one end of the inverted U-shaped return pipe 160, and a third channel of the quick-opening three-way cover 211 is connected with the other end of the circulation bypass. Of course, the medical knitted fabric can be taken and placed by arranging the serpentine condenser tube and the washer 210 in a detachable connection relationship, or arranging a movable sealing door on the side wall of the washer 210, and the like.

The content of contaminants, tensile breaking strength in warp and weft directions, pore size, gram weight, and the like of the medical knit absorbable by human body in the cleaning process of the above examples 1 to 3 were measured, and the results are shown in table 1 below.

TABLE 1 test results

Note: the content of the oil agent in the medical knitted fabric absorbable by a human body is detected according to the specification in GB/T6504-2017 standard, the short fibers and the particles are detected under a microscope, and the tensile breaking strength, the pore diameter and the gram weight are detected according to the Q/FJHXY 002-2021 standard.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.