CN207521389U - A kind of liquid impulse knife suitable in crooked pipeline - Google Patents

Abstract

The utility model is related to a kind of liquid impulse knives suitable in crooked pipeline, and including outer catheter and inner catheter, the outer catheter is sleeved on outside inner catheter, there is interval between inner catheter；The outer catheter includes free end and connecting pin, and the connecting pin is connected with drawing liquid pump；Described inner catheter one end is provided with hydrojet structure, and the hydrojet structure exposes the free end, and the other end is connected with syringe.Liquid impulse knife provided by the utility model suitable in crooked pipeline, by the way that one end of the free end of outer catheter and the hydrojet structure of inner catheter is stretched into pipeline during use, it is pressurizeed by syringe to hydrojet structure, the hydraulic shock obturator for spraying hydrojet structure, obturator is broken up, the liquid for being mixed with obturator is extracted out using drawing liquid pump while breaing up obturator, the liquid impulse knife being suitable in crooked pipeline of this structure is influenced smaller by the shape of pipeline, it is easy to use, it is particularly suitable for the cleaning of crooked pipeline.

Description

A kind of liquid impulse knife suitable in crooked pipeline

Technical field

The utility model is related to mechanical equipment and field of medical device, and in particular to a kind of liquid suitable in crooked pipeline State impulse knife.

Background technology

Pipeline includes engine oil path, engine air passage or blood vessel when blocking, generally clear using traditional cutter Reason, conventional tool is the cutting tool for having type, mostly metal knife-edge, however engine oil path, engine air passage or blood vessel etc. General to have bending, people are difficult using cutter in bending position, so that the cleaning to pipeline makes troubles or even can not be clear Reason.

Utility model content

Therefore, the utility model provides a kind of liquid impulse knife suitable in crooked pipeline, to solve above-mentioned ask Topic.

The technical solution of the utility model is：A kind of liquid impulse knife suitable in crooked pipeline, including outer catheter and Inner catheter, the outer catheter are sleeved on outside inner catheter, there is interval between inner catheter；The outer catheter includes free end and connection End, the connecting pin is connected with drawing liquid pump；Described inner catheter one end is provided with hydrojet structure, and the hydrojet structure exposing is described certainly By holding, the other end is connected with syringe.

Optionally, the connecting pin includes the first connecting pin and second connection end；It is led outside with described first connecting pin Pipe connects, and is connect with the drawing liquid pump；The second connection end is connected with the inner catheter, and is connected with the syringe It connects.

Optionally, outer catheter described in one end hermetically passing of the inner catheter far from the hydrojet structure and the syringe Connection.

Optionally, the hydrojet structure is nozzle.

Optionally, the hydrojet structure is spray orifice.

Optionally, the syringe is intelligent syringe.

Optionally, the nozzle includes head body, and inlet tube, the inlet tube and institute are provided in the head body State inner catheter connection；Inner housing is fixed with inside the nozzle, impeller is installed in the inner housing, the impeller passes through center Pipe is mounted in the inner housing, and the central tube includes hydrojet end and liquid feeding end, and the hydrojet end extends to the nozzle sheet In vitro, the liquid feeding end is extended to outside the inner housing；Inlet and liquid outlet, the nozzle sheet are provided on the inner housing Body is provided with feed pathway and liquid outlet channel；One end of the feed pathway is connected with the inlet, the other end with it is described into Liquid pipe connects；Cavity is provided with outside the liquid feeding end, one end of the liquid outlet channel is connected with the liquid outlet, the other end and institute State cavity connection.

Optionally, the central tube is provided with blocking portion in the position for being pierced by the inner housing, the blocking portion with it is described Ball is installed between inner housing；The hydrojet end is provided with the blocking body of spheric, is circumferentially uniformly arranged on the blocking body There are multiple hole for water sprayings；There is gap between the central tube and the head body.

Optionally, the nozzle includes head body, and inlet tube, the inlet tube and institute are provided in the head body State inner catheter connection；The nozzle is internally provided with turbine, and the bottom of the turbine is provided with multiple blades, the root of the blade Portion is provided with gully-hole, and the side that the top of the turbine is located at central shaft is provided with water outlet, the water outlet and the collection Water hole connects；Row's spray hole is provided at the top of the nozzle, be provided between the spray hole and the turbine first every From pipeline and the second isolation pipeline, the spray hole is divided into two groups to be multiple, one of which spray hole and first isolated tube Road connects, and pipeline connection is isolated with described second in another group of spray hole.

Optionally, the inside of the nozzle is fixed with semicircle strut, and the arc surface of the semicircle strut is close to described Inlet tube, the top of the turbine are connect with by axis with the inner wall of the nozzle, and the bottom end of the turbine passes through axis and semicircle Shape strut connects.

Liquid impulse knife provided by the utility model suitable in crooked pipeline, by by the freedom of outer catheter during use One end of the hydrojet structure of end and inner catheter is stretched into pipeline, is pressurizeed by syringe to hydrojet structure, is sprayed hydrojet structure Hydraulic shock obturator, obturator is broken up, while breaing up obturator using drawing liquid pump will be mixed with obturator liquid take out Go out, being influenced suitable for the liquid impulse knife in crooked pipeline by the shape of pipeline for this structure is smaller, easy to use, especially suitable For the cleaning of crooked pipeline.

Description of the drawings

It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution of the prior art Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below In attached drawing be the utility model some embodiments, for those of ordinary skill in the art, do not paying creativeness Under the premise of labour, other attached drawings are can also be obtained according to these attached drawings.

Fig. 1 is a kind of structure diagram of liquid impulse knife suitable in crooked pipeline of the utility model；

Fig. 2 is a kind of outer catheter of the utility model and the attachment structure schematic diagram of inner catheter；

Fig. 3 is a kind of structure diagram of inner catheter of the utility model；

Fig. 4 is a kind of structure diagram of nozzle；

Fig. 5 is Fig. 4 in one of the cross-sectional view in A-A directions；

Fig. 6 be Fig. 4 A-A directions cross-sectional view two；

Fig. 7 is a kind of control structure schematic diagram of syringe；

Fig. 8 is the structure diagram of another nozzle；

Fig. 9 is cross-sectional views of the Fig. 8 in A-A directions；

Figure 10 is a kind of structure diagram of turbine in Fig. 9；

Figure 11 is a kind of structure diagram of semicircle strut in Fig. 9；

Wherein, 11- outer catheters；12- inner catheters；121- spray orifices；13- free ends；14- connecting pins；141- first is connected End；142- second connection ends；15- drawing liquid pumps；16- syringes；17- head bodies；18- inlet tubes；19- inner housings；20- leaves Wheel；21- central tubes；211- liquid feeding ends；212- hydrojets end；22- inlets；23- liquid outlets；24- feed pathways；25- goes out liquid and leads to Road；26- cavitys；27- blocking portions；28- balls；29- stops body；30- hole for water sprayings；31- turbines；32- blades；33- gully-holes； 34- water outlets；35- spray holes；Pipeline is isolated in 36- first；Pipeline is isolated in 37- second；38- semicircle struts；39- axis； S1- Motor；S2- first gears；S3- second gears；S4- screw rods；S5- movable plates；S6- fixing brackets；S7- handles.

Specific embodiment

The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model part of the embodiment, instead of all the embodiments.Based on the embodiment in the utility model, sheet Field those of ordinary skill all other embodiments obtained without making creative work, belong to this practicality Novel protected range.

Embodiment 1, referring to Fig. 1, the utility model provides a kind of liquid impulse knife suitable in crooked pipeline, including Outer catheter 11 and inner catheter 12, the outer catheter are sleeved on outside inner catheter, there is interval between inner catheter；The outer catheter is included certainly Drawing liquid pump 15 is connected with by end 13 and connecting pin 14, the connecting pin；Described inner catheter one end is provided with hydrojet structure, the spray Liquid structure exposes the free end, and the other end is connected with syringe 16.

Liquid impulse knife provided by the utility model suitable in crooked pipeline, by by the freedom of outer catheter during use One end of the hydrojet structure of end and inner catheter is stretched into pipeline, and for blood vessel, drawing liquid pipeline (i.e. outer catheter) moves to affected area Mode with PTCA guiding catheter method of shipment, these are all well known to those skilled in the art, and details are not described herein again.For vapour Vehicle oil circuit can dismantle and directly be inserted into liquid suction pipe, and certain battle wagon can be by computer repairment detection technique, this A little is all well known to those skilled in the art, and details are not described herein again.Cleaning for different situations selects different liquid, than Blood vessel is such as cleared up, corresponding liquid can be used.It is pressurizeed by syringe to hydrojet structure, the liquid punching for spraying hydrojet structure Obturator is hit, obturator is broken up, is extracted out the liquid for being mixed with obturator using drawing liquid pump while breaing up obturator, this knot Being influenced suitable for the liquid impulse knife in crooked pipeline by the shape of pipeline for structure is smaller, easy to use, is particularly suitable for being bent The cleaning of pipeline.

As a kind of embodiment, the connecting pin includes the first connecting pin 141 and second connection end 142；Described first Connecting pin is connected with the outer catheter, and is connect with the drawing liquid pump；The second connection end is connected with the inner catheter to be worked as It can also so make and be integrated, and be connect with the syringe.As a kind of deformation, the inner catheter is far from the hydrojet knot Outer catheter described in one end hermetically passing of structure is connect with the syringe, i.e. the one end of inner catheter far from the hydrojet structure passes through It the outer catheter and is sealed being pierced by position and outer catheter, to prevent drawing liquid when is being pierced by position gas leakage effect drawing liquid effect.

It can also be arranged to form as shown in Figure 2, the one end of inner catheter far from the hydrojet structure directly through leading outside Pipe, by the port B setting caulking gum film sealings of outer catheter, directly opening installs liquid suction pipe, opening setting on outer catheter There is sealed Cellophane sealing, drawing liquid pipe port A connects liquid flow direction when the instruction of drawing liquid pump arrow uses；Inner catheter can also use this The setting of kind of form, referring to Fig. 3, in this way, can set multiple inner catheters that multiple nozzles can be installed on inner catheter into liquid, In order to the cleaning obturator that cooperates, specifically, the liquid injection pipe that A1 is the nozzle of most inner side, A2 is most inner side, liquid injection port A3 connections A Liquid injection system can be built within liquid injection pipe B2, and intelligent syringe can realize using and controlling to nozzle A1 by liquid injection port A3 System；B1 is the liquid injection pipe that nozzle, the B1 of time inside are time inside, and liquid injection port B3 connection B liquid injection systems can be built in liquid injection pipe Within C2, intelligent syringe can realize using and controlling to nozzle B1 by liquid injection port B3；C1 is the nozzle in outside, outside Liquid injection pipe, liquid injection port C3 connection C liquid injection systems can be via Fig. 1

Shown fluid injection tube passage, intelligent syringe can realize using and controlling to C1 nozzles by liquid injection port C3.

In the application, hydrojet structure can be spray orifice 121, nozzle or other structures that can spray liquid.Use spray orifice When, spray orifice can be the shapes such as T-shaped, triangular form, human-like, round.In the application, a kind of nozzle has also been devised in applicant, referring to Fig. 4 And Fig. 5, the nozzle include head body 17, are provided with inlet tube 18 in the head body, the inlet tube with it is described interior Conduit connects, and is preferably detachably connected；Inner housing 19 is fixed with inside the nozzle, impeller is installed in the inner housing 20, the impeller is mounted on by central tube 21 in the inner housing, and the central tube includes hydrojet end 212 and liquid feeding end 211, the hydrojet end is extended to outside the head body, and the liquid feeding end is extended to outside the inner housing；On the inner housing Inlet 22 and liquid outlet 23 are provided with, the head body is provided with feed pathway 24 and liquid outlet channel 25；The feed liquor leads to The one end in road is connected with the inlet, and the other end is connected with the inlet tube；Cavity 26 is provided with outside the liquid feeding end, it is described One end of liquid outlet channel is connected with the liquid outlet, and the other end is connected with the cavity, and the central tube is being pierced by the inner casing The position of body is provided with blocking portion 27, and ball 28 is equipped between the blocking portion and the inner housing, so that central tube revolves Turn；The hydrojet end is provided with the blocking body 29 of spheric, and multiple hole for water sprayings 30 are circumferentially evenly arranged on the blocking body；Institute Stating between central tube and the head body has gap.This structure, in use, liquid enters head body by inlet tube 18 Interior, the water conservancy diversion by feed pathway 24 enters inner housing 19, impact after the impeller rotation in inner housing by liquid outlet channel 25 into Enter in cavity, and be extruded into central tube 21 and finally sprayed by hole for water spraying 30, while spraying, in being driven due to impeller rotation Heart pipe rotates, and therefore, the liquid of ejection is that rotation sprays, and the mode of obstruction is squeezed relative to direct jetting liquid, has rotation It rubs when turning with obturator front, the effect of agitation is more advantageous to destroying obturator, and identical to obturator during liquid ejection Destructive power the application need ejection strength it is smaller, it is smaller for the pipeline reaction force of cleaning, it is more difficult that pipeline is made Into influence；In addition it after liquid enters cavity, has few liquid and penetrates into ball, have lubricating action spray orifice that can also hang down to ball Directly in the axis of central tube, the function of cutting can also be realized in this way.

As a kind of embodiment, the hydrojet end of central tube can not also be provided with the blocking body and water spray of spheric Hole is directly rotating ejection by central tube, and what only which sprayed is solid water column, is connect with obturator front face face Greatly, resistance is larger.

Alternatively, referring to Fig. 6, liquid outlet and liquid outlet channel, two of which blocking portion are not provided on inner housing Respectively inside and outside the wall of inner housing, one end that central tube is not provided with hole for water spraying is located at formation inlet in inner housing, Liquid-driving impeller rear screw, which is gathered in after inlet, rotates discharge, which is primarily adapted for use in that water jet is directed downwardly to use ring Border, the liquid rotated by the collection of inlet, when liquid sprays, rotary force bigger, central tube and blade or centre in Fig. 6 Central tube between can also be connected with supporting rod and set on better rotates effe or a direct central tube with reaching Put inlet.

A kind of nozzle has also been devised in applicant, and referring to Fig. 8-Figure 11, the nozzle includes head body 17, the nozzle sheet Inlet tube 18 is provided on body, the inlet tube is connected with the inner catheter；The nozzle is internally provided with turbine 31, the whirlpool The bottom of wheel is provided with multiple blades 32, and the root of the blade is provided with gully-hole 33, and the top of the turbine is located at center The side of axis is provided with water outlet 34, and the water outlet is connected with the gully-hole；Row spray is provided at the top of the nozzle Fluid apertures 35 is provided with first and the isolation pipeline 37 of pipeline 36 and second, the first isolation is isolated between the spray hole and the turbine Pipeline and the second isolation general size and shape of pipeline are identical, and intermediate isolating partially passes through the center line of nozzle, in order to by two A isolation ward is averagely separated, and the spray hole is multiple, is divided into two groups, one of which spray hole is isolated pipeline with described first and is connected Logical, pipeline connection be isolated with described second in another group of spray hole, as a preferred mode, water outlet be it is round, first every The diameter of diameter from pipeline, the diameter of the second isolation pipeline and water outlet is identical, and the axis of the first isolation pipeline is to whirlpool The distance of the axis (i.e. the axis of axis 39) of wheel is equal to the center of circle of water outlet and pipeline is isolated to the distance of the axis of turbine, second The distance of axis to the axis (i.e. the axis of axis 39) of turbine is equal to the center of circle of water outlet to the distance of the axis of turbine.This knot Structure, in jetting liquid, liquid is rotated by syringe compression shock turbine, after reaching water outlet after gully-hole is assembled, due to Turbine is rotating, therefore water outlet pipeline → deviation first can be isolated by face first pipeline → face second is isolated pipeline is isolated → deviate second isolation pipeline → face first pipeline is isolated, so recycling, such liquid can spray by first group of spray hole → It is compressed → being sprayed by second group of spray hole → to be compressed → sprayed by first group of spray hole, so be recycled, in this way, being hindered in cleaning During plug thing, there are 2 advantages：

Advantage 1：Stress point is constantly exchanged on the straight line of obturator, the position between two groups of spray holes is formed to the right Extruding → buffering → extruding to the left → buffering → squeezes to the right, so recycles, is equivalent to and extruded parts is squeezed a little while, It rocks a little while, execution is more preferable, which is more suitable for cutting obturator, can be arranged to loudspeaker at the top of certain spray hole The degree of lip-rounding, the liquid sprayed in this way can be even into a line, and only the dynamics of the intermediate liquid portion sprayed of spray hole is more than side The dynamics for the liquid that edge sprays；

Advantage 2：Liquid can be transformed by first group of spray hole ejection to be sprayed and by second group of spray hole by second group of spray During fluid apertures ejection is transformed by first group of spray hole ejection, has a bit of time water outlet 34 and be blocked, syringe Compressed liquid makes liquid accumulation of energy at this time, after rotating to face first and pipeline or the second isolation pipeline be isolated, the liquid energy of ejection Bigger is measured, squeezes and " rocking " effect is more preferable.

Certainly, the diameter of the diameter of the first isolation pipeline and the second isolation pipeline can also reach more than the diameter of water outlet Said effect, and first isolation pipeline diameter and second isolation pipeline diameter be much smaller than water outlet diameter when, it is possible to It has fraction water outlet when liquid is compressed and pipeline and the second isolation pipeline connection, such liquid energy storage effect is isolated with first It can weaken, but two groups of spray hole hydrojet interval times can shorten, and can equally reach two above-mentioned advantages, only have in effect Little bit different.

It should be noted that above-mentioned turbine and impeller can be used interchangeably, spray orifice, hole for water spraying and spray hole can make With identical structure.

As a kind of preferred mounting means, the inside of the nozzle is fixed with semicircle strut 38, referring to Fig. 9 and figure 11, the arc surface of the semicircle strut is close to the inlet tube, and the top of the turbine is with passing through axis 39 and the nozzle Inner wall connects, and the bottom end of the turbine is connect by axis 39 with semicircle strut, and strut is arranged to semicircle, be conducive to water from Side passes through, and triangle can also reach the effect, and only intensity upper half is round more preferable.

In the application, syringe can be promoted manually, generally, by the way that motor is controlled to promote, use the knot of motor propulsion Structure can use existing structure, such as the structure in Fig. 7：First gear S2, first gear both sides are installed on the axis of motor S1 Second gear S3 is engaged with, second gear center is fixed with screw rod S4 screw rods across movable plate S5 and fixing bracket S6 activities Riveting, and be threadedly coupled with movable plate, motor is fixed on fixed frame, and the handle S7 connections of movable plate and syringe pass through Motor drives first gear so as to drive second gear rotation control screw rod rotation, and then movable plate is made to be moved relative to screw rod and is pushed Or injector handle injecting fluid is pulled, motor can be controlled using digital control system；Certain syringe can also directly use city Intelligent syringe on face.

Liquid impulse knife provided by the utility model suitable in crooked pipeline has the characteristics that：

Example 1：It realizes the function of " brill ", controls feature

A:Spray orifice is small~and impetus area is small, pressure is big

B:Great efforts in unit interval

C:Action time is short

It is strong, controllable to penetration power

Example 2：It realizes the function of " squeeze, by ", controls feature

A:Spray orifice is big~and impetus area is big, pressure is small

Spray orifice can be T-shaped, triangular form, human-like, round ...

B:Dynamics is uniform in unit interval

C:Long action time

To which penetration power is weak, long action time, controllable

Example 3：It realizes the function of " cut, cut ", controls feature

A:Spray orifice can be that one row~impetus is linear

It is or T-shaped, triangular form, human-like, round ...

B:Dynamics appropriateness in unit interval

C:Action time appropriateness

D：Action direction is accurate

It is appropriate, controllable to cutting force appropriateness, cutting part

Drainage system：High-precision pump+digital control system+drawing liquid pipeline can be used, it is external that object extraction will be broken up

The use process illustrated below that should be suitable for the liquid impulse knife in crooked pipeline：

Example 1：Thrombus class is dredged, referring to Fig. 1：

Thrombus composition is mostly the clot of solidification, is easier to break up, selects, changes conventional uniform orifice shower nozzle, with thrombus pattern to blood Bolt sprays；

Start drainage system, the thrombus broken up is extracted out external.

Example 2：Accumulate fats dredging

Fats composition main component is cholesterol, has certain intensity, selects, changes fats orifice shower nozzle, to cut, cut mould Formula is sprayed to fat, with the blade type, dynamics, time of setting appropriateness realize it is different cut, cut action, cut, ream desired fat Position；

Start drainage system, the fat extraction cut, reamed is external.

Example 3：Atherosclerotic blocks class dredging

Atherosclerosis blocking need to be selected, change special spray orifice, nozzle, be sprayed with atherosclerosis pattern, impose respectively corresponding brill, Squeeze press, stock removal action；

Start drainage system, the object broken up is extracted out external.

Specifically：

A:It bores；The moderate hole of depth is ejected on atherosclerosis surface

B：It squeezes, pressing；" congee " is squeezed out by hole

C：It takes out；" congee " of extrusion is excreted

New position is selected, repeats ABC ...

………

An:It bores

Bn：It squeezes, pressing

Cn：It takes out

It realizes the skiving of atherosclerosis blood vessel, eliminate function

Special advantage

Feature 1：It is made of spray system+drainage system, cleaning at any time is bored, cut, squeezing the by-product feature 2 generated：It can be real In existing pipeline to the brill of machining object, squeeze and press, the actions such as cut, realize the complex treatment to atherosclerotic artery sclerosis

Feature 3：Precision is high

Realize millisecond, milligram grade control accuracy or even higher ...

Feature 4：Realize various action

A cuts type

Accurate direction controlling：

Accurate blade type selection：All kinds of points, triangle, circle, side ...

Accurate penetraction depth control：

B cutting actions

It bores

Hammering/extruding

Cutting

Other

Feature 5：By can X, Y, Z three-dimensional all-directional

Conventional tool only there are one force direction (cutting edge), three-dimensional each 360 degree of the utility model X, Y, Z be achievable to be bored, cuts, It squeezes

Feature 6：It is intelligent

The intelligent work pattern of A settings

B can combine outer catheter in image recognition technology control and reach affected area operation according to lesion feature

Feature 7：" spray orifice " is replaceable

According to the replaceable different spray orifices of different use occasions

Feature 8：More " spray orifices " work at the same time (see Fig. 3)

Multiple spray systems can be accommodated in one drawing liquid pipeline

Obviously, the above embodiments are merely examples for clarifying the description, and is not intended to limit the embodiments.It is right For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or It changes.There is no necessity and possibility to exhaust all the enbodiments.And the obvious variation thus extended out or Among the protection domain that variation is created still in the utility model.

Claims (10)

1. a kind of liquid impulse knife suitable in crooked pipeline, which is characterized in that including outer catheter (11) and inner catheter (12), The outer catheter is sleeved on outside inner catheter, there is interval between inner catheter；The outer catheter includes free end (13) and connecting pin (14), the connecting pin is connected with drawing liquid pump (15)；

Described inner catheter one end is provided with hydrojet structure, and the hydrojet structure exposes the free end, and the other end is connected with injection Device (16).

2. the liquid impulse knife according to claim 1 suitable in crooked pipeline, which is characterized in that the connecting pin packet Include the first connecting pin (141) and second connection end (142)；

First connecting pin is connected with the outer catheter, and is connect with the drawing liquid pump；

The second connection end is connected with the inner catheter, and is connect with the syringe.

3. the liquid impulse knife according to claim 1 suitable in crooked pipeline, which is characterized in that the inner catheter is remote Outer catheter described in one end hermetically passing from the hydrojet structure is connect with the syringe.

4. the liquid impulse knife according to claim 1 suitable in crooked pipeline, which is characterized in that the hydrojet structure For nozzle.

5. the liquid impulse knife according to claim 1 suitable in crooked pipeline, which is characterized in that the hydrojet structure For spray orifice (121).

6. the liquid impulse knife according to claim 1 suitable in crooked pipeline, which is characterized in that the syringe is Intelligent syringe.

7. the liquid impulse knife according to claim 4 suitable in crooked pipeline, which is characterized in that the nozzle includes Head body (17) is provided with inlet tube (18) in the head body, and the inlet tube is connected with the inner catheter；

Inner housing (19) is fixed with inside the nozzle, impeller (20) is installed in the inner housing, the impeller passes through center (21) are managed in the inner housing, the central tube includes hydrojet end (212) and liquid feeding end (211), and the hydrojet end is prolonged It extends to outside the head body, the liquid feeding end is extended to outside the inner housing；

Be provided with inlet (22) and liquid outlet (23) on the inner housing, the head body be provided with feed pathway (24) and Liquid outlet channel (25)；

One end of the feed pathway is connected with the inlet, and the other end is connected with the inlet tube；

Cavity (26) is provided with outside the liquid feeding end, one end of the liquid outlet channel is connected with the liquid outlet, the other end and institute State cavity connection.

8. the liquid impulse knife according to claim 7 suitable in crooked pipeline, which is characterized in that the central tube exists The position for being pierced by the inner housing is provided with blocking portion (27), and ball is equipped between the blocking portion and the inner housing (28)；

The hydrojet end is provided with the blocking body (29) of spheric, and multiple hole for water sprayings are circumferentially evenly arranged on the blocking body (30)；

There is gap between the central tube and the head body.

9. the liquid impulse knife according to claim 4 suitable in crooked pipeline, which is characterized in that the nozzle includes Head body (17) is provided with inlet tube (18) in the head body, and the inlet tube is connected with the inner catheter；

The nozzle is internally provided with turbine (31), and the bottom of the turbine is provided with multiple blades (32), the root of the blade Portion is provided with gully-hole (33), and the side that the top of the turbine is located at central shaft is provided with water outlet (34), the water outlet It is connected with the gully-hole；

Row's spray hole (35) is provided at the top of the nozzle, first is provided between the spray hole and the turbine and is isolated Pipeline (36) and the second isolation pipeline (37), the spray hole are multiple, are divided into two groups, one of which spray hole and described first Pipeline connection is isolated, pipeline connection is isolated with described second in another group of spray hole.

10. the liquid impulse knife according to claim 9 suitable in crooked pipeline, which is characterized in that the nozzle Inside is fixed with semicircle strut (38), and the arc surface of the semicircle strut is close to the inlet tube, the top of the turbine It is connect with by axis (39) with the inner wall of the nozzle, the bottom end of the turbine is connect by axis (39) with semicircle strut.