CN201012117Y

CN201012117Y - Liquid electricity type bifocus shock wave source focalizer

Info

Publication number: CN201012117Y
Application number: CNU2007200338846U
Authority: CN
Inventors: 孙西钊
Original assignee: Nanjing Drum Tower Hospital
Current assignee: Nanjing Drum Tower Hospital
Priority date: 2007-01-30
Filing date: 2007-01-30
Publication date: 2008-01-30
Anticipated expiration: 2017-01-30

Abstract

The utility model relates to a key part focalizing device for the ectogenetic bow wave detritus machine. The utility model comprises a main focalizing body and an assistant focalizing body, which form two sets of ellipsoidal focalizing combination; the ellipse equations for the main focalizing body and the assistant focalizing body are same; the assistant focalizing body is mounted in the main focalizing body; the height of the first focus in the two ellipsoidal focalizing combination for the main focalizing body and the assistant focalizing body are same while that for the second focus are different. The device can overcome the shortcoming for the existing focalizing device that the existing focalizing device only uses the reflecting wave when the bow wave enters the calculus and the refracting wave when the bow wave passes the calculus together to create the tensile force and the other series stress domino effect created around the bow wave for the calculus to comminute the calculus; the results are that the detritus efficiency is much lower and the pain to the patient is much greater and so on. Except for keeping the reflecting bow wave, the utility model can also create the cutting stress to make the calculus easy to be crashed; so the device can enhance the working efficiency, decrease the pain, shorten the cure period and decrease the cure cost and so on.

Description

A kind of electrohydraulic type bifocus shock wave source focalizer

Technical field

This utility model relates to a kind of Medical Instruments, particularly a kind of core component focalizer of extra chock wave lithotriptor.

Background technology

Before the present utility model, traditional electrohydraulic type shock wave source energy focusing device (custom claims reflector) is single-focusing (as shown in Figure 1), wave source generator A launches wave source, shock wave sends from first focal point F 1, utilize the metal semielliptical focus on body B with the shock wave fixed aggregate on second focal point F 2 of semielliptical.The mechanical mechanism of its rubble mainly is the tension force that focus wave when entering calculus by incident blast wave and the refracted wave when passing calculus produce, and since shock wave to a series of stress effect effects of the pressure that produces around the calculus etc. and pulverized.But, refracted wave when echo when the single-focusing shock wave source focalizer of this electrohydraulic type has only utilized shock wave to enter calculus and shock wave pass calculus the common tension force that produces and shock wave to a series of stress effects of being produced around the calculus and crushed stone, therefore calculifragous efficiency can't improve all the time, patient's misery, effect is not fully up to expectations.

Summary of the invention

The purpose of this utility model just is to overcome above-mentioned defective, designs a kind of bifocal focusing body structure device.

The technical solution of the utility model is:

A kind of electrohydraulic type bifocus shock wave source focalizer, its major technique is characterised in that by prime focus body, the secondary focusing body that focuses on two groups of oval calottes of body and combines, the elliptic equation of prime focus body, secondary focusing body is identical, the secondary body that focuses on is spliced in the prime focus body, the first focus height that prime focus body, two groups of oval calottes of secondary focusing body focus on body is identical, the second focus difference.

Advantage of the present utility model is that with effect the bifocus shock wave source produces two different directions, the different focal spot of stress point, changed the Stress Field Distribution mode of single focus wave source, except tension force and pressure that traditional approach produces, stress field overlay region between bifocal, produce stronger shear stress, and the shear-stable intensity of calculus is far below tensile strength and comprcssive strength, thus calculus just easier quilt pulverized.Improve therapeutic efficiency, alleviate patient's misery, shorten treatment cycle, reduce medical expense.And this utility model is simple in structure, easy to operate.

Description of drawings

Fig. 1---existing single focus electrohydraulic type shock wave source energy focusing device structural principle sketch map.

Fig. 2---this utility model shock wave operation principle sketch map.

Fig. 3---this utility model structure cross sectional representation.

The specific embodiment

Shown in Fig. 2,3, the structural change of the oval focusing of original single focus body is identical for single ellipse is become incident focal point F 1, but the bielliptic(al) structure of F2A, F2B that reflect focalization point is different, be prime focus body 1, the secondary body 2 that focuses on, the shock wave that will be produced by same electrode electrion source 3, utilize two first focuses in the metal semielliptical to overlap and the focusing body of the different bielliptic(al) curved surface of the second focus height is assembled shock wave, utilize the stress field overlay region between the bifocal (F, F), produce shear stress calculus is pulverized with regard to easier quilt.Prime focus body 1, the secondary focusing body that focuses on 2 liang of groups of body oval calotte all are single faces, and area was got in this example 1: 1/2 than at 1/1-1/4.The focusing accent footpath a of prime focus body 1 is φ 50mm～φ 250mm, and the secondary wall thickness b that focuses on body 2 is 10mm～50mm, gets φ 250mm, 50mm in this example respectively.Therefore, only increase small cost, do not change on the basis of original machine construction and improved lithotrity effect.

Operation principle discloses:

The main anti-oval calotte that focuses on of design

The secondary body oval calotte that focuses on of design

Design makes 2C ₂＞2C ₁, this difference be prime focus body 1 second focus and the secondary second focus vertical dimension difference that focuses on body 2 between 5-15mm, be chosen for 10mm in this example.

During fabrication, the secondary outside dimension that focuses on body 2 must be processed the same with the elliptic equation (size) of prime focus body 1, and two first focuses that focus on body are overlapped, just can reach requirement, as shown in Figure 3, with the oval secondary body 2 that focuses on of hydroelectric shock wave, the oval prime focus body of edge feed liquor surge ripple 1 inwall forms the identical and focusing body of the bielliptic(al) curved surface that second focus is different of two of one first focuses.

The scope that this utility model is asked for protection is not limited only to the description of this specific embodiment.

Claims

1. electrohydraulic type bifocus shock wave source focalizer, it is characterized in that combining by prime focus body, the secondary focusing body that focuses on two groups of oval calottes, the elliptic equation of prime focus body, secondary focusing body is identical, the secondary body that focuses on is spliced in the prime focus body, the first focus height that prime focus body, two groups of oval calottes of secondary focusing body focus on body is identical, the second focus difference.

2. a kind of electrohydraulic type bifocus shock wave source focalizer according to claim 1, the focusing body that it is characterized in that major and minor two groups of oval calottes all is single faces, the area ratio is at 1/1-1/4.

3. a kind of electrohydraulic type bifocus shock wave source focalizer according to claim 1 is characterized in that the focusing accent footpath a of prime focus body is φ 50mm～φ 250mm, and the secondary wall thickness b that focuses on body is 10mm～50mm.

4. a kind of electrohydraulic type bifocus shock wave source focalizer according to claim 1 is characterized in that prime focus body second focus and the secondary second focus vertical dimension difference that focuses on body are 5mm～15mm.