CN202637684U - Portable negative-pressure drainage device - Google Patents

Portable negative-pressure drainage device Download PDF

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Publication number
CN202637684U
CN202637684U CN 201120465971 CN201120465971U CN202637684U CN 202637684 U CN202637684 U CN 202637684U CN 201120465971 CN201120465971 CN 201120465971 CN 201120465971 U CN201120465971 U CN 201120465971U CN 202637684 U CN202637684 U CN 202637684U
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CN
China
Prior art keywords
pressure
liquid
tube
pipe clamp
silica gel
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CN 201120465971
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Chinese (zh)
Inventor
黎柴佐
张利
Original Assignee
黎柴佐
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Priority to CN 201120465971 priority Critical patent/CN202637684U/en
Application granted granted Critical
Publication of CN202637684U publication Critical patent/CN202637684U/en

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Abstract

The utility model discloses a portable negative-pressure drainage device, comprising a power supply circuit assembly, a pressure control switch controlling the operation of a vacuum pump, a pressure regulating device regulating the drainage pressure, the vacuum pump performing the vacuum suction by employing a roller to continuously squeeze an elastic silica gel pipe, and a gas-liquid buffer storing liquid and gas temporarily. The portable negative-pressure drainage device is applicable for performing the negative-pressure suction of the gas and liquid inside a wound or a cavity after a clinic operation. The pressure control switch controls the operation of the vacuum pump to realize the negative-pressure drainage in a stable manner. Through the pressure control switch, the pressure regulating device is capable of conveniently regulating the drainage negative pressure as required. The portable negative-pressure drainage device is driven by a battery set, thereby being convenient to carry and long in service time, needing little maintenance, and being capable of effectively reducing the burden of medical care personnel or accompanying personnel. The negative-pressure drainage is not cut off during the battery changing process. The gas-liquid buffer and the silica gel pipe are simple and convenient to disassemble and assemble, and can be disposable or used repeatedly after being cleaned and disinfected.

Description

Portable negative-pressure drainage apparatus
Technical field
This utility model relates to a kind of Portable negative-pressure drainage apparatus, relates in particular to a kind of Portable drainage device for need to carry out negative pressure drainage behind the clinical operation to wound or cavity.
Background technology
After operation, can there be some lacunas in the wound surface junction, and the wound surface place has partial necrosis tissue and wound surface to have the liquid secretion deposits yields, and these all can cause wound healing slow.Skin grafting in the plastic surgery is as example, the new skin of transplanting and the wound between the matrix, if there is the interference of lacuna, slough or liquid secretion thing etc., can hinder the combination of new cutify and matrix, form the phenomenons such as similar blister, slow down the growth of blood capillary, hinder new cutify blood circulation, and may cause the serious consequences such as new cutify necrosis.Technology commonly used after the operation is placed a tubule at wound surface, then adopts negative pressure equipment that tubule is carried out negative pressure-pumping, reduces lacuna, and in time gets rid of liquid etc.Existing negative pressure-pumping equipment is relatively simple and weak point is arranged, and equipment commonly used is the method continuous negative pressure drainage of property syringe, disposable vacuum suction box, central negative pressure attraction once.Adopt disposable syringe to aspirate, syringe is connected on the drainage tube, toward post-tensioning and adopt cutting ferrule that syringe piston is fixed, liquid or gas will enter into the syringe space under the swabbing action of negative pressure in the inner negative pressure space that produces of syringe this moment with syringe piston.The method is relatively simple, but because the space of syringe is little, after syringe pulls open, along with the suction of liquids and gases, can cause the interior space of syringe to reduce gradually from high negative pressure, and suction capactity reduces gradually.When gas and amount of liquid were larger, when the gas leakage of pipeline or interface perhaps occurring, the suction capactity of syringe can lose efficacy very soon, and nursing staff and be not easy to find that suction lost efficacy, if change untimelyly, juice caused adverse consequences to wound after negative pressure disappeared.In addition, adopt the cutting ferrule fixed piston, because cutting ferrule is too simple, in case careless, may cause the cutting ferrule landing, owing to negative pressure being arranged in the syringe, during the cutting ferrule landing, push away before can causing syringe piston rapidly, with the percolating fluid inverse injection to the wound face, cause huge misery to patient, and very easily tear wound, cause wound to worsen.
Another kind of mode is to adopt disposable vacuum suction box, and disposable vacuum suction box is an elastic container, receives on the drainage tube after box is flattened again.Disposable vacuum suction box space is larger than syringe, keep the negative pressure time slightly long, and can conveniently find out from the distortion of disposable vacuum suction box whether its negative pressure lost efficacy, but there is the problem of pressure instability equally in this mode.
Some hospitals that the central negative pressure interface is arranged in the ward adopt the device of the direct drain of central negative pressure more.This device is comprised of a control valve, liquid-collecting bottle and pipeline.Control valve connects central negative pressure, regulates the suction negative pressure and liquid-collecting bottle and pipeline are aspirated by control valve, when reaching required negative pressure value, closes control valve.This mode can effectively form negative pressure drainage, but appoints the problem that so has pressure instability.Negative pressure value in the liquid-collecting bottle can reduce along with entering of liquids and gases causes negative pressure value equally.Therefore need medical personnel or entourage often to notice that the pressure in the liquid-collecting bottle changes, when negative pressure value is lower than certain required value, needs to open control valve and aspirate.Increase medical personnel's workload, and at night, caused inconvenience sharp.And because pipeline one direct sum central negative pressure links to each other, so that patient has to lie for a long time on one's sick bed, can not Go to ground activity, patient's psychology is caused certain burden.
Therefore can find out existing these equipment, in the application of negative pressure drainage, all have many deficiencies, need a kind ofly can stablize control negative pressure, long-play, non-maintaining and want the little lightweight depression drainage device that can be convenient for carrying of volume.
The utility model content
In order to solve the deficiency of present negative pressure drainage technology, reach pressure stability, negative pressure is adjustable, safeguard less, purpose easy to carry, to improve reliability and the practicality of armarium, the Portable negative-pressure drainage apparatus that this utility model provides a kind of pressure stability, safeguards less, negative pressure is adjustable provides a kind of convenient and reliable armarium for the rear wound of performing the operation needs the patient of negative pressure drainage.
This utility model provides a kind of Portable negative-pressure drainage apparatus, comprises that Liquid and gas damper, the pressure control switch of control vacuum pump operation, the continuously extruded flexible silicon sebific duct of employing roller of power circuit components, temporary liquids and gases carries out the vacuum pump of vacuum draw and the pressure regulator of pressure control switch being regulated to change pressure;
Described power circuit components comprises dry cell batteries, wire and diode, and described diode can prevent effectively that motor reversal causes gas-liquid inverse injection wound in the anti-loaded situation of battery plus-negative plate;
Described Liquid and gas damper is the sealed container that contains three interfaces, comprises Liquid and gas damper body, drainage tube interface, vacuum pump interface, pressure tube, flexible pipe and weight; Described drainage tube interface is in order to connect the drainage tube of drawing from wound; Described vacuum pump interface connects the vacuum pump silica gel tube; The vacuum pump interface is communicated with the flexible pipe of Liquid and gas damper inside simultaneously; Described flexible pipe imbibition end connects the weight of hollow, so that flexible pipe imbibition end can move in Liquid and gas damper, and so that the imbibition end is in extreme lower position with preferential imbitition; Described pressure tube stretches into the Liquid and gas damper center, and pressure is passed to pressure control switch, and prevents that liquid from flowing into pressure tube;
The pressure control switch of described control vacuum pump operation comprises bourdon tube, pressure transmission flexible pipe, motion bar, contact switch; The hose connection pressure tube of described pressure transmission also imports bourdon tube with the pressure in the Liquid and gas damper; Described bourdon tube one end is fixed on the bourdon tube holder; Hinge on the described motion bar is connected with bourdon tube, and motion bar left end fixed hinge position is fixed, and right-hand member acts on contact switch; Described motion bar is subject to the promotion of bourdon tube distortion, promotes the contact switch action; Described contact switch comprises upper spring sheet, lower spring sheet, spring leaf holder, upper lug and lower lug; Spring leaf is installed on the spring leaf holder, and the left end extension is upper lug and lower lug, in order to connect wire; Upper contact is installed on upper spring sheet right-hand member downside, and lower contact is installed in lower spring sheet right-hand member upside, and two contact positions are relative; When negative pressure reduced in Liquid and gas damper, the bourdon tube distortion drove motion bar and rotates counterclockwise, and the motion bar free end promotes to move on the lower spring sheet, and lower contact contacts with upper contact, the touch switch circuit conducting, and vacuum pump starts and Liquid and gas damper is aspirated; When negative pressure in the Liquid and gas damper raise, bourdon tube promoted motion bar and clockwise rotates, and the lower spring sheet moves down lower contact under the elastic reaction of self, until two contacts separately, contact switch opens circuit, and vacuum pump is out of service, negative regulation;
Described vacuum pump comprises direct current generator, change speed gear box, wheel disc, roller, pipe clamp, pipe clamp alignment pin, spring, silica gel tube; Described direct current generator starts when contact switch contacts, and reduces rotating speed and improves torque by the change speed gear box that is connected on the direct current generator; Described wheel disc is connected to the output shaft of change speed gear box and does and clockwise rotates; Described rotating disk is the regular polygon structure, and on each drift angle roller free to rotate is installed; Described pipe clamp is a semicircle snap ring, and the gap between pipe clamp and the roller is used for the extruding silica gel tube; Described silica gel tube is a kind of elasticity body, and forms exclusion seal in extruding place distortion; Described roller is under the drive of wheel disc, and with the continuously extruded silica gel tube of pipe clamp, the exclusion seal of formation is mobile clockwise along silica gel tube; Described silica gel tube recovers pipe after crimp, its elastic return forms the suction capactity of silica gel tube so that the crush seal rear presents vacuum;
Described pressure-regulating device is comprised of adjusting knob, threaded rod, hold-doun nut; Described threaded rod is connected with adjusting knob and cooperates with hold-doun nut; Described threaded rod lower end acts on the upper spring sheet; The rotation adjusting knob, threaded rod is moved under the effect of hold-doun nut, with change contact switch contact contact position, and then the break-make pressure of change contact switch; By position of rotation and the corresponding break-make pressure of demarcating knob, and at knob sign negative pressure scale, can indicate required pressure.
Further, also comprise pipe clamp and pipe clamp alignment pin, described pipe clamp left end is chain connection, and right-hand member cooperates with the pipe clamp alignment pin; Move down the pipe clamp alignment pin, pipe clamp is opened, and silica gel tube can be introduced between pipe clamp and the roller, and the pipe clamp that turns clockwise compresses silica gel tube, and the pipe clamp alignment pin moves down under the ramp effect of pipe clamp, until pin pipe clamp.
Further, also comprise the Liquid and gas damper draw-in groove, described draw-in groove is Liquid and gas damper fixedly; Drainage tube interface and drainage tube are supporting, and vacuum pump adapter and silica gel tube are supporting, pressure transmission flexible pipe and pressure tube and pressure control switch interface kit, and liquid-collection bag interface and liquid-collection bag are supporting; Pipeline connects with corresponding interface.
Compared with prior art, Portable negative-pressure drainage apparatus has following advantage:
1, this utility model adopts the operation of pressure control switch control vacuum pump, so that negative pressure can be stablized control, negative pressure can not occur large fluctuation occurs, and the size of drainage flow is had the widely scope of application.
2, pressure-regulating device is set, can according to the actual requirements, regulates drain pressure.
3, adopt battery powered, whole drainage device volume is little, lightweight, can be convenient for carrying.
4, the liquid-collection bag interface is set, when liquid reaches a certain amount of in liquid-collection bag, conveniently replaced liquid-collection bag or liquid in the liquid-collection bag processed.
5, adopting the continuously extruded silica gel tube of roller to produce negative pressure space aspirates, in outage (running down of battery) situation, the sealing that roller extruding silica gel tube forms can be not destroyed, can not cause the interior negative pressure of Liquid and gas damper to be destroyed, and greatly improved the negative pressure reliability.Only need change battery and get final product, when having avoided changing in the additive method, negative pressure is destroyed, affects the negative pressure state of wound.
6, adopt the operation of pressure control vacuum pump, the running time of vacuum pump is short, and drainage device is long service time, and power consumption is low, safeguards few.Can be applicable to operation and be accomplished to wound and no longer need the whole time period of negative pressure drainage, during do not need to change.
7 parts that need to change sterilization all are easy to dismounting, can conveniently pull down Liquid and gas damper and silica gel pipeline, clean and disinfect, and also use disposable gas-liquid buffer and silica gel tube, and use cost is cheap.
Description of drawings
Fig. 1 is the cross section view of Portable negative-pressure drainage apparatus;
Fig. 2 is the structural representation of pressure control switch.
Drawings; 1 - case 2 - Battery Group 3 - DC machine 4 - Gearbox 5 - Roulette 6 - roller 7 - Tube card 8 - pipe card positioning pin 9 - spring 10 - silicone tube 11 - set fluid bags Interface 12 - vacuum interface 13 - liquid buffer 14 - hose 15 - weight 16 - drainage tube connector 17 - pressure transmission pipe 18 - slot 19 - Fax pressure hose 20 - pressure control switch 21 - touch switch 22 - power switch 23 - diode 24 - pressure adjustment knob 25 - pressure control switch connected to the 26 - spring Tube holder 27 - spring tube 28 - fixed hinge 29 - active lever hinge 30 - activities rod 31 - contact switch next spring piece 32 - contact switch on the spring sheet 33 - under contacts 34 - upper contact 35 - fixing nut 36 - screw 37 - pressure adjustment knob 38 - spring holder 39 - on the wiring head 40 - under the lugs
The specific embodiment
Below in conjunction with the drawings and specific embodiments this utility model is described in more detail.
Fig. 1 is the structural representation of Portable negative-pressure drainage apparatus, and Fig. 2 is the pressure control switch structural representation, as shown in the figure.Portable negative-pressure drainage apparatus comprises that power circuit components, vacuum pump system, Liquid and gas damper and pressure control switch and pressure regulator form.
Power circuit components comprises dry cell batteries 2, on and off switch 22, wire, diode 23 and external power interface.Set of cells 2 is for Portable negative-pressure drainage apparatus provides power resources, so that drainage device can be convenient for carrying.Wire connected battery group 2, on and off switch 22, diode 23, pressure control switch 20 and direct current generator 3.The whole connecting and disconnecting of the circuit of on and off switch 22 controls, 20 of pressure control switch start direct current generator 3 when negative pressure is low, close direct current generator 3 when negative pressure is high.When diode 23 prevented that battery plus-negative plate is anti-loaded, motor 3 counter-rotatings were injected wound with drainage-fluid.
Vacuum pump system comprises that direct current generator 3, change speed gear box 4, wheel disc 5, roller 6, pipe clamp 7, pipe clamp alignment pin 8, spring 9, silica gel tube 10, liquid-collection bag interface 11 form.When negative pressure was low, pressure control switch 20 was connected, and direct current generator 3 is opened, and change speed gear box 4 reduces and improve its torque with the rotating speed of direct current generator 3.Change speed gear box 4 output shafts connect rotating disk 5 and do and clockwise rotate.Rotating disk 5 is the regular polygon structure, and at each drift angle roller 6 free to rotate is installed.Pipe clamp 7 is arc-shaped structure, and is concentric with rotating disk 5, and certain interval (silica gel tube internal diameter size is looked in this gap and wall thickness determines, less than 2 times of wall thickness) is arranged between pipe clamp 7 and the roller 6.Silica gel tube 10 places between the gap of pipe clamp 7 and roller 6.Because this gap is less than 2 times of wall thickness, silica gel tube 10 deforms under the squeezing action of roller 6 and pipe clamp 7, and the space is cut off in the silica gel tube, and forms sealing.When wheel disc 5 rotated, pipe clamp 7 and silica gel tube 10 positions did not change.Roller 6 is along the circumferential translation of change speed gear box 4 output shafts, and roller 6 rotates and pushes silica gel tube 10 along roller shaft simultaneously.Silica gel tube is extruded the position of distortion and moves clockwise along change speed gear box 4 output shafts.Because elastic return is pipe after silica gel tube 10 crimps, the crush seal rear forms vacuum area.Wheel disc 5 drives a plurality of roller 6 continuously extruded silica gel tubes 10, so that silica gel tube 10 has continuous vacuum capability.
Pipe clamp 7 left ends are chain connection, and right-hand member cooperates with pipe clamp alignment pin 8.Down sliding pipe clamp alignment pin 8, pipe clamp 7 can be opened, silica gel tube 10 is introduced between pipe clamp 7 and the roller 6, the pipe clamp 7 that turns clockwise compresses silica gel tube 10, and pipe clamp alignment pin 8 moves down under the end chamfer effect of pipe clamp 7, holddown spring 9, until after pinning pipe clamp 7, spring 9 promotes to move on the pipe clamp alignment pin 8, finish silica gel 10 and install.Under this mode, silica gel tube 10 easy accessibility.
Vacuum pump system carries out vacuum draw to Liquid and gas damper 13, and Liquid and gas damper 13 is the cylindricality transparent plastic container, has certain gas-liquid storage capacity as pressure buffer container, and is used for connecting each pipeline.Liquid and gas damper 13 is fixed on the housing 1 by draw-in groove 18, so that Liquid and gas damper 13 can easy disassembly.Respectively there is an interface at Liquid and gas damper 13 two ends, and the right-hand member vacuum pump connects 12 and connects vacuum pump silica gel tube 10.The flexible pipe 14 that vacuum pump interface 12 is communicated with in the Liquid and gas damper 13.Flexible pipe 14 other ends pack into the weight 15 of a hollow.When the Portable negative-pressure drainage apparatus position changes, weight 15 will drag flexible pipe 14 motions under action of gravity, so that flexible pipe 14 can preferentially aspirate the liquid in the Liquid and gas damper 13, if Liquid and gas damper 13 interior liquid are too much accumulated, not only gain in weight, and might cause liquid to enter pressure tube 17, affect pressure control.In addition, pressure tube 17 is deep into the center of Liquid and gas damper 13, can prevent effectively that liquid from entering pressure tube 17.Pressure in the Liquid and gas damper 13 transmits to pressure control switch 20 by pressure tube 17.
Pressure control switch 20 is connected with Liquid and gas damper 13 by a pressure transmission flexible pipe 19.Pressure control switch 20 comprises pressure control switch interface 25, bourdon tube holder 26, bourdon tube 27, motion bar 30 and contact switch 21.Pressure control switch interface 25 links to each other with pressure tube 19, with pressure transmission in bourdon tube 27.Bourdon tube holder 26 fixation pressure gauge tap interfaces 25 (pressure incoming end).Bourdon tube 27 1 ends are connected in pressure control switch interface 25 upper ends, and bourdon tube 27 other ends directly act on the motion bar 30 by motion bar hinge 29.Motion bar 30 left ends are fixed hinge 28, and when bourdon tube 27 internal pressures changed, bourdon tube 27 deformed, drive motion bar hinge 29 and move up and down, thereby so that motion bar 30 rotate along fixed hinge 28.The free end of motion bar 30 is then controlled contact switch 21 actions.Contact switch 21 comprises lower spring sheet 31, upper spring sheet 32, lower contact point 33, upper contact point 34, spring leaf holder 38, upper lug 39, lower lug 40.38 insulation of spring leaf holder, lower spring sheet 31 and upper spring sheet 32 1 ends are installed on the spring leaf holder 38.Spring leaf is reserved lug in spring leaf holder one side, in order to connect wire.Contact point is at the spring leaf free end, and upper contact point 34 is installed in the downside of upper spring sheet 32, and lower contact point 33 is installed in the upside of lower spring sheet 31, and two contacting points positions over against.
When the negative pressure in Liquid and gas damper 13 reduces, it is large that the radius of curvature of bourdon tube 27 becomes, driving hinges 29 is moved upward, so that motion bar 30 is when rotating counterclockwise along fixed hinge 28, motion bar 30 free ends promote 31 distortion of lower spring sheet, the contact point 33 of installing on the lower spring sheet 31 moves up, when lower contact point 33 touches contact point 34, between lug 39 and the lug 40 by spring leaf and upper and lower contact are connected to form path up and down.If this moment, on and off switch 22 was in closure state, set of cells 2, on and off switch 22, contact switch 21 and direct current generator 3 will form path.Direct current generator 3 starts, and drives vacuum pump Liquid and gas damper 13 is aspirated.When the negative pressure in the Liquid and gas damper 13 raise, motion bar 30 turned clockwise, and lower spring sheet 31 moves down, separate between the upper and lower contact, and circuit breaker, vacuum pump quits work, and stops suction.
Because the deflection of bourdon tube 27 is corresponding with negative pressure value, therefore the displacement of lower contact 33 is also corresponding with the negative pressure in the Liquid and gas damper 13, position by adjusting upper contact 34 is the contact position of scalable upper and lower contact, thereby reaches the purpose of regulating Liquid and gas damper 13 internal pressures.Pressure-regulating device comprises adjusting knob 37, threaded rod 36, hold-doun nut 35.Threaded rod 36 is connected with adjusting knob 37 and cooperates with hold-doun nut 35.Threaded rod 36 lower ends act on upper spring sheet 32.Rotation adjusting knob 37, threaded rod is moved under the effect of hold-doun nut 35, with change contact switch 21 contact contact positions, and then the break-make pressure of change contact switch 21.By position of rotation and the corresponding break-make pressure of demarcating knob 37, and at knob 37 sign negative pressure scales, can conveniently regulate pressure.
Liquid and gas damper 13 and silica gel tube 10 need dismounting to carry out cleaning and sterilizing or replacing after use.Open pipe clamp 7 by drop-down pipe clamp alignment pin 8 first, take off silica gel 10, take off pressure transmission flexible pipe 19 from pressure control switch interface 25, take off Liquid and gas damper 13 from draw-in groove 18.Equally, sterile-processed or disposable Liquid and gas damper 13 and silica gel tube 10 are installed before use, first silica gel tube 10 is connected on the vacuum pump interface 12, with Liquid and gas damper 13 draw-in groove 18 of packing into, pressure transmission flexible pipe 19 is connected on the pressure control switch interface 25, then silica gel tube 10 is put between pipe clamp 7 and the roller 6, press down pipe clamp 7 and pin pipe clamp 7, to be connected to from the drainage tube that wound is drawn drainage tube interface 16, liquid-collection bag will be connected on the liquid-collection bag interface at last, namely finish whole installation.Dry cell batteries 2 is installed, presses on and off switch 22, Portable negative-pressure drainage apparatus gets final product work.
Explanation is at last, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to preferred embodiment this utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.

Claims (3)

1. a Portable negative-pressure drainage apparatus is characterized in that: comprise that the Liquid and gas damper (13) of power circuit components, temporary liquids and gases, pressure control switch (20), employing roller (6) the continuously extruded flexible silicon sebific ducts (10) of control vacuum pump operation carry out the vacuum pump of vacuum draw and the pressure regulator of pressure control switch (20) being regulated to change pressure;
Described power circuit components comprises dry cell batteries (2), wire and diode (23), and described diode (23) can prevent effectively that motor (3) counter-rotating causes gas-liquid inverse injection wound in the anti-loaded situation of battery plus-negative plate; Described Liquid and gas damper (13) comprises Liquid and gas damper body (13), drainage tube interface (16), vacuum pump interface (12), pressure tube (17), flexible pipe (14) and weight (15) for containing the sealed container of three interfaces; Described drainage tube interface (16) is in order to connect the drainage tube of drawing from wound; Described vacuum pump interface (12) connects vacuum pump silica gel tube (10); Vacuum pump interface (12) is communicated with the inner flexible pipe (14) of Liquid and gas damper (13) simultaneously; Described flexible pipe (14) imbibition end connects the weight (15) of hollow, so that flexible pipe (14) imbibition end can move in Liquid and gas damper (13), and so that the imbibition end is in extreme lower position with preferential imbitition; Described pressure tube (17) stretches into Liquid and gas damper (13) center, and pressure is passed to pressure control switch (20), and prevents that liquid from flowing into pressure tube (17);
The pressure control switch (20) of described control vacuum pump operation comprises bourdon tube (27), pressure transmission flexible pipe (19), motion bar (30), contact switch (21); Described pressure transmission flexible pipe (19) connects pressure tube (17) and the pressure in the Liquid and gas damper (13) is imported bourdon tube (27); Described bourdon tube (27) one ends are fixed on the bourdon tube holder (26); Hinge (29) on the described motion bar (30) is connected with bourdon tube (27), and motion bar (30) left end fixed hinge (28) position is fixed, and right-hand member acts on contact switch (21); Described motion bar (30) is subject to the promotion of bourdon tube (27) distortion, promotes contact switch (21) action; Described contact switch (21) comprises upper spring sheet (32), lower spring sheet (31), spring leaf holder (38), upper lug (39) and lower lug (40); Spring leaf is installed on the spring leaf holder (38), and the left end extension is upper lug (39) and lower lug (40), in order to connect wire; Upper contact (34) is installed on upper spring sheet (32) right-hand member downside, and lower contact (34) is installed in lower spring sheet (31) right-hand member upside, and two contact positions are relative; When negative pressure reduces in Liquid and gas damper (13), bourdon tube (27) distortion, driving motion bar (30) rotates counterclockwise, motion bar (30) free end promotes to move on the lower spring sheet (31), lower contact (33) contacts with upper contact (34), contact switch (21) circuit turn-on, vacuum pump start and Liquid and gas damper (13) are aspirated; When negative pressure in the Liquid and gas damper (13) raises, bourdon tube (27) promotes motion bar (30) and clockwise rotates, lower spring sheet (31) makes lower contact (33) move down under the elastic reaction of self, until two contacts separately, contact switch (21) opens circuit, vacuum pump is out of service, negative regulation;
Described vacuum pump comprises direct current generator (3), change speed gear box (4), wheel disc (5), roller (6), pipe clamp (7), pipe clamp alignment pin (8), spring (9), silica gel tube (10); Described direct current generator (3) starts when contact switch (21) contacts, and reduces rotating speed and improves torque by the change speed gear box (4) that is connected on the direct current generator (3); Described wheel disc (5) is connected to the output shaft of change speed gear box (4) and does and clockwise rotates; Described rotating disk (5) is the regular polygon structure, and on each drift angle roller (6) free to rotate is installed; Described pipe clamp (7) is a semicircle snap ring, and the gap between pipe clamp (7) and the roller (6) is used for extruding silica gel tube (10); Described silica gel tube (10) is a kind of elasticity body, and forms exclusion seal in extruding place distortion; Described roller (6) is under the drive of wheel disc (5), and with the continuously extruded silica gel tube of pipe clamp (7) (10), the exclusion seal of formation is mobile clockwise along silica gel tube (10); Described silica gel tube (10) recovers pipe after crimp, its elastic return forms the suction capactity of silica gel tube (10) so that the crush seal rear presents vacuum;
Described pressure-regulating device is comprised of adjusting knob (37), threaded rod (36), hold-doun nut (35); Described threaded rod (36) is connected with adjusting knob (37) and cooperates with hold-doun nut (35); Described threaded rod (36) lower end acts on upper spring sheet (32); Rotation adjusting knob (37), threaded rod is moved under the effect of hold-doun nut (35), with change contact switch (21) contact contact position, and then the break-make pressure of change contact switch (21); By position of rotation and the corresponding break-make pressure of demarcating knob (37), and at knob (37) sign negative pressure scale, can indicate required pressure.
2. Portable negative-pressure drainage apparatus according to claim 1, it is characterized in that: also comprise pipe clamp (7) and pipe clamp alignment pin (8), described pipe clamp (7) left end is chain connection, and right-hand member cooperates with pipe clamp alignment pin (8); Move down pipe clamp alignment pin (8), pipe clamp (7) is opened, silica gel tube (10) can be introduced between pipe clamp (7) and the roller (6), pipe clamp (7) turns clockwise, compress silica gel tube (10), pipe clamp alignment pin (8) moves down under the ramp effect of pipe clamp, until pin pipe clamp (7).
3. Portable negative-pressure drainage apparatus according to claim 1 and 2, it is characterized in that: also comprise Liquid and gas damper draw-in groove (18), described draw-in groove (18) is Liquid and gas damper (13) fixedly; Drainage tube interface (16) is supporting with drainage tube, vacuum pump adapter (12) is supporting with silica gel tube (10), pressure transmission flexible pipe (19) is supporting with pressure tube (17) and pressure control switch interface (25), and liquid-collection bag interface (11) is supporting with liquid-collection bag; Pipeline connects with corresponding interface.
CN 201120465971 2011-11-22 2011-11-22 Portable negative-pressure drainage device CN202637684U (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103127601A (en) * 2011-11-22 2013-06-05 黎柴佐 Portable negative pressure drainage device
CN105784571A (en) * 2016-02-29 2016-07-20 深圳市帝迈生物技术有限公司 Double-cell measurement method and device for certain reaction protein (CRP)
CN109331245A (en) * 2018-09-28 2019-02-15 德州飚丰信息技术有限公司 Medicinal intelligent drainage controlling device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103127601A (en) * 2011-11-22 2013-06-05 黎柴佐 Portable negative pressure drainage device
CN105784571A (en) * 2016-02-29 2016-07-20 深圳市帝迈生物技术有限公司 Double-cell measurement method and device for certain reaction protein (CRP)
CN109331245A (en) * 2018-09-28 2019-02-15 德州飚丰信息技术有限公司 Medicinal intelligent drainage controlling device

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