CN112755271A

CN112755271A - Orthopedics is clinical with negative pressure aspirator

Info

Publication number: CN112755271A
Application number: CN202110067051.6A
Authority: CN
Inventors: 季庆辉; 薛宇; 杨刃思
Original assignee: Jiamusi University
Current assignee: Jiamusi University
Priority date: 2021-01-19
Filing date: 2021-01-19
Publication date: 2021-05-07
Anticipated expiration: 2041-01-19
Also published as: CN112755271B

Abstract

The invention relates to the technical field of medical instruments and discloses a negative pressure aspirator for orthopedic clinical use, which comprises an aspirating tube and a controller, wherein the top of the aspirating tube is connected with an aspirating head, the lower end of the aspirating tube is connected with a blockage dredging box, the aspirating tube is communicated with the inner cavity of the blockage dredging box, two sides of the bottom end of the blockage dredging box are respectively connected with a shunt tube, the two shunt tubes are both communicated with the inner cavity of the blockage dredging box, and a blockage dredging component which plays a role in dredging blockages is arranged in the inner cavity of the blockage dredging box. According to the invention, the traditional pipeline conveying mode is changed into a split-flow conveying mode of two split-flow pipes, when one split-flow pipe is blocked, the other split-flow pipe can continue to convey, and time is provided for dredging of the split-flow pipes, so that the problem that the traditional suction apparatus cannot continue to dredge after the pipeline is blocked is solved, and the suction efficiency of the negative pressure suction apparatus is improved.

Description

Orthopedics is clinical with negative pressure aspirator

Technical Field

The invention relates to the technical field of medical instruments, in particular to a negative pressure aspirator for orthopedics clinical use.

Background

The negative pressure aspirator is used for aspirating and removing the contents of hemorrhage, exudate, pus and thoracic organs in the operation, so that the operation is eliminated, and the pollution chance is reduced. The principle of the negative pressure suction apparatus is very simple, namely, negative pressure is generated through a vacuum pump or other modes, and substances outside the suction head are extruded into the suction head by atmospheric pressure, so that the suction effect is achieved.

The traditional method is that repeated squeezing is carried out by hand when the suction tube is blocked, and the negative pressure in the negative pressure bottle is increased due to the blockage of the pipeline, so that the sucked broken bones are gathered together, the hardness is higher, the time is occupied by squeezing by hand, and the broken bones are not thoroughly removed; and the aspirator tube is replaced again, so the operation time is longer.

In addition, because the hose is generally used for suction, when the hose is blocked, the negative pressure is increasingly greater due to continuous suction at the blocked rear section, and the upper wall and the lower wall of the hose are gradually attached together due to the air pressure difference of the hose, so that the pressure on the blocked objects is further increased, and the dredging of the pipeline is more troublesome.

Disclosure of Invention

Aiming at the defects of the existing negative pressure suction apparatus in the background technology in the using process, the invention provides the orthopedic clinical negative pressure suction apparatus which has the advantage of automatically dredging the blockage of a pipeline and solves the problems of time waste caused by manual dredging and blockage and trouble dredging and blockage caused by blockage of a hose in the background technology.

The invention provides the following technical scheme: the utility model provides an orthopedics is clinical with negative pressure suction apparatus, is including attracting pipe and controller, the top of attracting the pipe is connected with attracts the head, the lower extreme of attracting the pipe is connected with and dredges stifled case, attract pipe and the inner chamber of dredging stifled case to be linked together, the both sides of dredging stifled bottom of the case are connected with the shunt tubes respectively, two the shunt tubes all is linked together with the inner chamber of dredging stifled case, be provided with the stifled subassembly of dredging the effect of plug in the inner chamber of dredging stifled case, the shunt tubes is kept away from the one end of dredging stifled case and is connected with the collection flow box, the middle part of collection flow bottom.

Preferably, the dredging component comprises a flow distribution plate, a clean liquid inlet pipe, liquid pushing plates, a reset spring, an inner electromagnet and a pressure measurer, wherein the flow distribution plate is positioned in the middle of the bottom surface of an inner cavity of the dredging box, the flow distribution plate can be bent left and right, the top surface and the bottom surface of the dredging box are respectively communicated with the clean liquid inlet pipe and the flow distribution pipes which are symmetrical relative to the flow distribution plate, the clean liquid inlet pipe is provided with a one-way electric valve, the inner wall of the dredging box is slidably connected with the two liquid pushing plates, the two liquid pushing plates are respectively positioned at the outer sides of the joints of the dredging box and the two flow distribution pipes, the reset spring is connected between the dredging box and the liquid pushing plates, the flow distribution plate and the two liquid pushing plates are respectively provided with the inner electromagnet, the pressure measurer is fixedly installed on the side surface, close to the flow distribution plate, of the liquid pushing plates, and.

Preferably, the middle upper end of the flow distribution plate is provided with a middle fixed magnet, the liquid pushing plate is internally provided with a side fixed magnet, the middle fixed magnet, the side fixed magnet and the inner electromagnet are positioned at the same height in the dredging box, and the magnetic pole of one side of the middle fixed magnet close to the side fixed magnet is the same as the magnetic pole of the other side close to the side fixed magnet.

Preferably, the top of flow distribution plate is sharp, the both sides wall of flow distribution plate and the inner wall of dredging stifled case are laminated mutually, the flow distribution plate is located and attracts the center of pipe and dredging stifled case junction, the flow distribution plate will attract the import of pipe to cut apart into two symmetrical minutes mouths, the inner wall of dredging stifled case is equipped with the cardboard that is located and attracts the pipe junction, the cardboard is unanimous with the most advanced gradient of flow distribution plate to the side that is close to the flow distribution plate.

Preferably, an air pressure measurer is installed at one end, close to the flow collecting box, of the flow dividing pipe, and is electrically connected with the controller, an electromagnetic valve is installed at one end, close to the dredging and blocking box, of the flow dividing pipe, and the electromagnetic valve is electrically connected with the controller.

Preferably, the suction tube is a hard pipeline, a grip is arranged on the suction tube, a button is installed at the grip, and the button is electrically connected with the controller.

Preferably, sliding connection has the shutoff board on the inner wall of collection flow box, two parts will be cut apart into to the shutoff board with the collection flow box, the inside of collection flow box is equipped with the stopper that is located collection pipe junction both sides respectively, be equipped with down fixed magnet and lower electro-magnet on the shutoff board and on the outer wall of collection flow box respectively, electro-magnet and controller electric connection down.

The invention has the following beneficial effects:

1. according to the invention, the traditional pipeline conveying mode is changed into a split-flow conveying mode of two split-flow pipes, when one split-flow pipe is blocked, the other split-flow pipe can continue to convey, and time is provided for dredging of the split-flow pipes, so that the problem that the traditional suction apparatus cannot continue to dredge after the pipeline is blocked is solved, and the suction efficiency of the negative pressure suction apparatus is improved.

2. According to the invention, through the mutual matching of the flow distribution plate, the clean liquid inlet pipe, the liquid pushing plate, the reset spring and the inner electromagnet, the flow distribution pipe can be automatically dredged in time after being blocked, the traditional manual dredging mode is abandoned, the negative pressure suction apparatus can be ensured not to occupy extra time for manual dredging when one flow distribution pipe is blocked, the continuous suction time of the negative pressure suction apparatus is prolonged, and meanwhile, hydraulic pressure is utilized for quick impact, so that the dredging efficiency is improved.

3. The invention judges whether the shunt pipe is blocked by measuring the air pressure in the shunt pipe by using the air pressure measurer without manual detection, and can control the action of the pore blocking plate according to the air pressure in the shunt pipe after the shunt pipe is blocked, thereby not only preventing the shunt pipe from deforming seriously to increase the difficulty of dredging the blockage, but also avoiding the damage caused by fatigue deformation of the shunt pipe, being beneficial to dredging the blockage, and prolonging the service life of the shunt pipe.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a partial top view structural diagram of the dredging box;

fig. 3 is a partial bottom view structural diagram of the dredging box.

In the figure: 1. a suction tube; 101. a suction head; 2. dredging the blockage assembly; 3. dredging the blockage box; 301. clamping a plate; 4. a shunt tube; 401. an electromagnetic valve; 5. a combiner box; 501. a limiting block; 6. a collector pipe; 7. a controller; 8. a flow distribution plate; 801. a middle fixed magnet; 9. feeding the purified liquid into the pipe; 901. a one-way electric valve; 10. a liquid pushing plate; 1001. a side fixed magnet; 11. a return spring; 12. an internal electromagnet; 13. a pressure measurer; 14. a hole plugging plate; 1401. a lower fixed magnet; 1402. a lower electromagnet; 15. an air pressure measurer; 16. a button.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, an orthopedic clinical negative pressure suction apparatus comprises a suction tube 1 and a controller 7, wherein the top of the suction tube 1 is connected with a suction head 101, the lower end of the suction tube 1 is connected with a blocking box 3, the suction tube 1 is communicated with the inner cavity of the blocking box 3, two sides of the bottom end of the blocking box 3 are respectively connected with a shunt tube 4, the two shunt tubes 4 have the same diameter as that of the suction tube 1, the two shunt tubes 4 are both communicated with the inner cavity of the blocking box 3, a blocking component 2 for dredging a blocking object is arranged in the inner cavity of the blocking box 3, one ends of the shunt tubes 4 far away from the blocking box 3 are connected with a confluence box 5, the middle part of the bottom surface of the confluence box 5 is connected with a confluence tube 6, one ends of the shunt tubes 4 close to the confluence box 5 are provided with an air pressure measurer 15, the air pressure measurer 15 is electrically connected with the controller 7, and the air pressure measurer 15 is used for.

The dredging component 2 comprises a flow distribution plate 8, a purified liquid inlet pipe 9, liquid pushing plates 10, a reset spring 11, an inner electromagnet 12 and a pressure measurer 13, wherein the flow distribution plate 8 is positioned in the middle of the bottom surface of an inner cavity of the dredging box 3, the flow distribution plate 8 can be bent left and right, but the flow distribution plate 8 is bent under the action of a larger force, the flow distribution plate 8 cannot be impacted and bent by body tissue liquid of patients such as broken bones under normal suction, the top surface and the bottom surface of the dredging box 3 are respectively communicated with the purified liquid inlet pipe 9 and the flow dividing pipes 4 which are symmetrical relative to the flow distribution plate 8, a one-way electric valve 901 is arranged on the purified liquid inlet pipe 9, the inner wall of the dredging box 3 is slidably connected with the two liquid pushing plates 10, the two liquid pushing plates 10 are respectively positioned at the outer sides of the joints of the dredging box 3 and the two flow dividing pipes 4, the reset spring 11 is connected between the dredging box 3 and the liquid pushing plates 10, the two flow distribution plates 8, the pressure measurer 13 is fixedly arranged on the side surface of the liquid pushing plate 10 close to the flow distribution plate 8, and the purpose of using the pressure measurer 13 is as follows: since during aspiration of interstitial fluid, the interstitial fluid is likely not full, i.e., there is some air and some interstitial fluid in the shunt tube 4, in order to achieve impact on the blockage, it is necessary that the fluid in the shunt tube 4 is enough to press the fluid during the movement stroke of the plunger 10, and therefore the pressure gauge 13 is used to control the amount of irrigation fluid entering from the clean fluid inlet tube 9; the inner electromagnet 12 and the pressure measurer 13 are electrically connected to the controller 7, namely the number of the flow distribution plate 8 is one, the clean liquid inlet pipe 9, the liquid pushing plate 10, the reset spring 11 and the inner electromagnet 12 are of a group of integral structures, two groups of integral structures are arranged in the dredging and blocking box 3 symmetrically relative to the flow distribution plate 8, and each group of integral structures corresponds to one flow distribution pipe 4.

The middle upper end of the flow distribution plate 8 is provided with a middle fixed magnet 801, the push liquid plate 10 is internally provided with a side fixed magnet 1001, the middle fixed magnet 801, the side fixed magnet 1001 and the inner electromagnet 12 are positioned at the same height in the dredging box 3, the magnetic pole of one side of the middle fixed magnet 801, which is close to the side fixed magnet 1001, is the same as the magnetic pole of one side of the side fixed magnet 1001, the top end of the flow distribution plate 8 is pointed, the flow distribution plate 8 with the pointed end can reduce the blocking effect on the tissue, and meanwhile, if the pointed end of the flow distribution plate 8 is sharp, the flow distribution plate can play a role in cutting the tissue, reduce the volume of the tissue, thereby reducing the probability of blockage; the both sides wall of flow distribution plate 8 is laminated with the inner wall of dredging stifled case 3 mutually, flow distribution plate 8 is located and attracts pipe 1 and dredge the center of stifled case 3 junction, flow distribution plate 8 will attract the import of pipe 1 to cut apart into two mouthfuls of symmetry, tissue fluid and tissue thing in the pipe 1 that attracts can only flow from the both sides of flow distribution plate 8 promptly, then get into respectively in the shunt tubes 4 of both sides, the inner wall of dredging stifled case 3 is equipped with the cardboard 301 that is located and attracts the pipe 1 junction, cardboard 301 is unanimous to the side that is close to flow distribution plate 8 and the most advanced gradient of flow distribution plate 8, make the most advanced of flow distribution plate 8 can with the very big laminating of cardboard, prevent on the one hand that tissue and tissue thing in the pipe 1 that attracts to continue to get into in the shunt tubes 4 of jam aggravate the circumstances of jam, on the other hand also prevent that.

Taking the inner electromagnet 12 on the left side of the diversion plate 8 in fig. 1 as an example, when direct current is supplied to the inner electromagnet 12, the magnetic pole direction of the magnetic length generated by the inner electromagnet 12 is N on the left side and S on the right side, at this time, the inner electromagnet 12 will attract the middle fixed magnet 801 to bend to the left side, and the inner electromagnet 12 will also repel the side fixed magnet 1001 to move to the left side, when the diversion plate 8 bends to be attached to the clamping plate 301, assuming that the current value in the inner electromagnet 12 is the lowest current value at this time, the tissue fluid and the like of the patient flowing into the blocking and dredging box 3 from the attraction pipe 1 will flow only from the right side of the blocking and dredging box 3 and flow out through the diversion pipe 4 on the right side, and based on the lowest current value, the current of the inner electromagnet 12 is continuously increased, the distance of the movement of the liquid pushing plate 10 and the side fixed magnet 1001 to the left side of the blocking and dredging box 3 is increased, at this time, when the current of the inner electromagnet 12 is reduced to the minimum current value, the liquid flows into the shunt tube 4 under the pushing of the liquid pushing plate 10, and impacts the blockage in the shunt tube 4, so that the blockage dredging purpose is achieved.

The shunt tubes 4 are close to the one end of the collection flow box 5 and are installed with an air pressure measurer 15, the air pressure measurer 15 is electrically connected with the controller 7, and the air pressure measurer 15 detects whether the shunt tubes 4 are blocked or not according to the principle that: under normal conditions, the shunt plate 8 is used for shunting, the amounts of interstitial fluid and tissue in the two shunt tubes 4 are relatively even, and in the process of sucking the tissue, air enters the shunt tubes 4, so that the air pressure measurer 15 can detect the air pressure in the shunt tubes 4, the air pressure difference in the two shunt tubes 4 is relatively balanced, the difference value fluctuates in a normal range, after one shunt tube is blocked, the air pressure at the lower end of the blocked shunt tube 4 is gradually reduced due to the continuous suction effect of the air pressure pump communicated with the confluence tube 6, the air pressure in the unblocked shunt tube 4 is relatively kept unchanged, so that the air pressure difference in the two shunt tubes 4 is gradually increased, after the air pressure is increased to exceed the normal range, the shunt tube 4 with small air pressure can be judged to be blocked, after the signal of the air pressure measurer 15 is transmitted to the controller 7, the controller 7 can control the corresponding blocking and dredging component 2 to act, one end of the shunt tube 4 close to the dredging box 3 is provided with an electromagnetic valve 401, the electromagnetic valve 401 is electrically connected with the controller 7,

attract pipe 1 to adopt the stereoplasm pipeline, the medical personnel of being convenient for use, should use transparent material preparation simultaneously for medical personnel can observe and attract whether blockking up in pipe 1, attract and be equipped with the handle on the pipe 1, and button 16 is installed to handle department, button 16 and controller 7 electric connection.

The inner wall of the collecting box 5 is connected with a plugging plate 14 in a sliding way, the collecting box 5 is divided into two parts by the plugging plate 14, the inside of the collecting box 5 is respectively provided with a limiting block 501 positioned at two sides of the joint of the collecting pipe 6, the plugging plate 14 and the outer wall of the collecting box 5 are respectively provided with a lower fixing magnet 1401 and a lower electromagnet 1402, the lower electromagnet 1402 is electrically connected with the controller 7, as the shunt pipe 4 generally uses a hose, generally, when one shunt pipe 4 is blocked, the lower end part of the blockage of the shunt pipe 4 is continuously sucked, when the shunt pipe 4 is sucked for a certain time, the internal and external air pressure difference shunt pipe 4 of the shunt pipe 4 can form the condition of inner wall fitting, at the moment, due to the stress action of the shunt pipe 4, the pressure to the blockage can be increased, so that the friction force for moving the blockage is further increased, the blockage is not easy to be dredged, therefore, when the air pressure measurer 15 detects that, can control the stifled orifice plate 14 and remove for the passageway between collecting pipe 6 and shunt tubes 4 is blocked, and after shunt tubes 4 were dredged, atmospheric pressure in shunt tubes 4 can make the atmospheric pressure that the atmospheric pressure measurer 15 was measured rise because the gas flow of plug upper end, so this moment can make stifled orifice plate 14 reverse movement, open the passageway between shunt tubes 4 and the collecting pipe 6.

The using method of the invention is as follows:

firstly, in a normal state, when the shunt tubes 4 are not blocked, the differential pressure measured by the air pressure measuring devices 15 on the two shunt tubes 4 is in a normal range; when the suction tube 1 is not blocked, a user can directly observe the part without blockage through the suction tube 1;

secondly, aiming at the blockage of the 4 pipelines of the shunt tubes, the automatic dredging is carried out, and the specific process is as follows:

firstly, when one shunt tube 4 is blocked and the other shunt tube 4 is not blocked, the differential pressure measured by the air pressure measurer 15 on the two shunt tubes 4 is in an abnormal range, the air pressure in the blocked shunt tube 4 is low, the air pressure in the unblocked shunt tube 4 is high, and a signal is transmitted to the controller 7;

secondly, the controller 7 leads direct current to the inner electromagnet 12 corresponding to the blocked shunt tube 4, one end of the inner electromagnet 12 attracts the middle fixed magnet 801 to enable the middle fixed magnet 801 to be tightly attached to the clamping plate 301, at the moment, the liquid pushing plate 10 moves outwards for a certain distance due to the repulsive force of the side fixed magnet 1001 and the inner electromagnet 12, the corresponding electromagnetic valve 401 and the one-way electric valve 901 are opened, flushing liquid enters the dredging box 3 through the liquid purifying inlet pipe 9 and is positioned between the shunt plate 8 and the liquid pushing plate 10, the flushing liquid flows into the electromagnetic valve 401, when the hydraulic pressure measured by the pressure measurer 13 reaches a certain value, the one-way electric valve 901 is closed, the controller 7 continues to increase the direct current led into the inner electromagnet 12, the repulsive force of the side fixed magnet 1001 of the inner electromagnet 12 enables the liquid pushing plate 10 to continuously overcome the elastic pressure of the return spring 11 to compress the return spring, and then the current in the inner electromagnet 12 is, the liquid pushing plate 10 is recovered under the elastic pressure of the return spring 11, the crushed bones at the blocking position are impacted by pushing the shunt tube 4 and the liquid in the inner cavity of the dredging box 3 communicated with the shunt tube 4, and the operation is repeated, so that the crushed bones are displaced or pushed to move into the confluence box 5 by the impact of the liquid;

in addition, in the above process, the air pressure measurer 15 measures the air pressure in the shunt tube 4 all the time, and when the measured pressure is reduced to a certain degree, the controller 7 controls the current led into the lower electromagnet 1402 at this time, so that the lower electromagnet 1402 attracts or repels the lower fixed magnet 1401 on the plugging plate 14, so that the plugging plate 14 moves and blocks the channel between the blocked shunt tube 4 and the collecting tube 6, thereby avoiding continuous and perfect negative pressure suction in the shunt tube 4;

finally, when the broken bone in the blocked shunt tube 4 is broken or pushed into the collecting box 5, the shunt tube 4 is penetrated, so that the value of the air pressure measured by the air pressure measuring device 15 is greatly changed, and at this time, the controller 7 controls the current of the lower electromagnet 1402, so that the orifice plate 14 is restored to the central position of the collecting box 5.

In the above procedure, only one of the shunt tubes 4 is considered blocked because this is a greater chance, while both shunt tubes 4 are relatively less likely to be blocked and are therefore not considered.

Thirdly, when the suction tube 1 is blocked, the medical staff holds the suction tube 1 by hands, so that the medical staff can easily find the blockage, and at the moment, the medical staff needs to remove the suction tube 1 from the wound of the patient and press the button 16;

the button 16 transmits a signal to the controller 7, the controller 7 controls the two electromagnetic valves 401 to close, so as to reduce or avoid backflow of dirty liquid in the shunt pipe 4, meanwhile, the one-way electric valve 901 is opened, flushing liquid is introduced into the dredging box 3, the one-way electric valve 901 is closed when the measured value of the pressure measurer 13 reaches a certain pressure, at the moment, the controller 7 introduces current into the inner electromagnet 12, the current is increased until the top end of the shunt plate 8 is in contact with the clamping plate 301, in the process that the shunt plate 8 bends towards the clamping plate 301, the liquid pushing plate 10 moves outwards, liquid flows into the dredging box 3 from the suction pipe 1 through an opening between the shunt plate 8 and the clamping plate 301, then, the current value in the inner electromagnet 12 is reduced, at the moment, the shunt plate 8 is restored to the original state due to the action of self stress, and the liquid pushing plate 10 is restored to the original state under the elastic force of the return spring 11, so as to extrude the, the blocked part in the suction tube 1 is impacted to achieve the purpose of quick impact, after dredging, the one-way electric valve 901 can be opened again to introduce certain flushing water, the interior of the suction tube 1 is flushed completely, secondary pollution to the wound of a patient is prevented, and therefore manual extrusion is not needed.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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

Claims

1. The utility model provides an orthopedics is clinical with negative pressure suction ware, is including attracting pipe (1) and controller (7), the top of attracting pipe (1) is connected with attracts head (101), its characterized in that: the lower extreme of attracting pipe (1) is connected with and dredges stifled case (3), attract pipe (1) and the inner chamber of dredging stifled case (3) to be linked together, the both sides of dredging stifled case (3) bottom are connected with shunt tubes (4) respectively, two shunt tubes (4) all are linked together with the inner chamber of dredging stifled case (3), be provided with in the inner chamber of dredging stifled case (3) and dredge stifled subassembly (2) of dredging the effect of plug, shunt tubes (4) are kept away from the one end of dredging stifled case (3) and are connected with collection flow box (5), the middle part of collection flow box (5) bottom surface is connected with collector tube (6).

2. The clinical negative pressure aspirator for orthopedics of claim 1, wherein: the dredging component (2) comprises a flow distribution plate (8), a clean liquid inlet pipe (9), a liquid pushing plate (10), a reset spring (11), an inner electromagnet (12) and a pressure measurer (13), wherein the flow distribution plate (8) is positioned in the middle of the bottom surface of an inner cavity of the dredging box (3), the flow distribution plate (8) can be bent left and right, the top surface and the bottom surface of the dredging box (3) are respectively communicated with the clean liquid inlet pipe (9) and the flow distribution pipes (4) which are symmetrical relative to the flow distribution plate (8), the clean liquid inlet pipe (9) is provided with a one-way electric valve (901), the inner wall of the dredging box (3) is slidably connected with the two liquid pushing plates (10), the two liquid pushing plates (10) are respectively positioned at the outer sides of the connection parts of the dredging box (3) and the two flow distribution pipes (4), the reset spring (11) is connected between the dredging box (3) and the liquid pushing plates (10), and the inner electromagnet (12) is respectively arranged between the flow distribution plate (8) and the two liquid pushing, the pressure measurer (13) is fixedly arranged on the side face, close to the flow distribution plate (8), of the liquid pushing plate (10), and the inner electromagnet (12) and the pressure measurer (13) are both electrically connected to the controller (7).

3. The clinical negative pressure aspirator for orthopedics of claim 2, wherein: the middle upper end of the flow distribution plate (8) is provided with a middle fixed magnet (801), the pushing plate (10) is internally provided with a side fixed magnet (1001), the middle fixed magnet (801), the side fixed magnet (1001) and the inner electromagnet (12) are positioned at the same height in the dredging box (3), and the magnetic pole of the middle fixed magnet (801) close to the side fixed magnet (1001) is the same as the magnetic pole of the side fixed magnet (1001).

4. The clinical negative pressure aspirator for orthopedics of claim 2, wherein: the top of flow distribution plate (8) is pointed, the both sides wall of flow distribution plate (8) is laminated with the inner wall of dredging stifled case (3) mutually, flow distribution plate (8) are located and attract pipe (1) and dredge the center of stifled case (3) junction, two minutes mouths of symmetry are cut apart into in the import that flow distribution plate (8) will attract pipe (1), the inner wall of dredging stifled case (3) is equipped with cardboard (301) that are located and attract pipe (1) junction, cardboard (301) are unanimous with the most advanced gradient of flow distribution plate (8) to the side that is close to flow distribution plate (8).

5. The clinical negative pressure aspirator for orthopedics of claim 1, wherein: the utility model discloses a flow box, including shunt tubes (4), atmospheric pressure caliber (15) are installed to shunt tubes (4) one end that is close to collection flow box (5), atmospheric pressure caliber (15) and controller (7) electric connection, solenoid valve (401) are installed to shunt tubes (4) one end that is close to dredge stifled case (3), solenoid valve (401) and controller (7) electric connection.

6. The clinical negative pressure aspirator for orthopedics of claim 1, wherein: attract pipe (1) to adopt the stereoplasm pipeline, be equipped with the handle on attracting pipe (1), button (16) are installed to handle department, button (16) and controller (7) electric connection.

7. The clinical negative pressure aspirator for orthopedics of claim 1, wherein: the inner wall of the confluence box (5) is connected with a plugging plate (14) in a sliding mode, the confluence box (5) is divided into two parts by the plugging plate (14), limiting blocks (501) located on two sides of the joint of the confluence pipes (6) are arranged inside the confluence box (5) respectively, a lower fixing magnet (1401) and a lower electromagnet (1402) are arranged on the plugging plate (14) and the outer wall of the confluence box (5) respectively, and the lower electromagnet (1402) is electrically connected with the controller (7).