CN107137803B - High-pressure injector needle cylinder rotation fixing device with plunger limiting function and method - Google Patents

Abstract

The invention discloses a high-pressure injector needle cylinder rotation fixing device with plunger limiting and a method, wherein the device comprises the following components: the syringe protective sleeve is sleeved on the outer side of the high-pressure syringe and the syringe seat is fixedly matched with one end of the syringe protective sleeve, wherein the syringe seat is provided with a plurality of elastic plunger pieces located in the radial direction of the syringe protective sleeve, and the syringe protective sleeve is provided with an annular groove matched with the elastic plunger pieces. The invention has simple and convenient operation, is not easy to generate misoperation when the needle cylinder is replaced, and can take out the needle cylinder or put the needle cylinder into the needle cylinder protective sleeve without pulling down the needle tube.

Description

High-pressure injector needle cylinder rotation fixing device with plunger limiting function and method

Technical Field

The invention relates to a high-pressure injector needle cylinder rotation fixing device with plunger limiting function and a method.

Background

High pressure syringes are one of the devices often used in medical equipment for injecting liquids such as contrast media, saline, and the like into the body to enhance the effectiveness of medical imaging such as X-ray or electromagnetic imaging. Which is operated by a nurse to administer the contrast media injection to the patient. The general process comprises the steps of installing and fixing the syringe, setting injection parameters, injecting, disassembling the syringe and the like. The replacement of the syringe of the high-pressure injector on the existing market has the following actions:

step1, taking down the syringe protective sleeve and the syringe integrally

Step2, separating the needle tube from the needle cylinder

Step3, replacing the new syringe and reinserting the new syringe into the syringe protective sleeve

Step4, connecting the needle tube with a new needle cylinder

Step5: the needle cylinder protective sleeve and the needle cylinder are integrally installed back to the high-pressure injector head, the needle cylinder is limited through the front end of the needle cylinder protective sleeve, and the needle cylinder is fixed through the fixed needle cylinder protective sleeve.

And most reach in the high pressure syringe product that injection pressure is greater than 1000PSI on the market, its cylinder fixed mode is mostly the cylinder and arranges the cylinder in the cylinder protective sheath, the cylinder inserts from the protective sheath rear portion, accomplish the assembly after whole installation again to high pressure syringe needle cylinder seat on, this kind of structure has directly leaded to the nurse when changing the cylinder, must take out the cylinder from cylinder protective sheath rear portion earlier, change the cylinder again, this action inevitable needs pull out the needle tubing, thereby caused the secondary pollution of external environment to the cylinder.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a high-pressure syringe needle cylinder rotation fixing device with plunger limiting, which is simple and convenient to operate, is not prone to misoperation during replacement of a needle cylinder, and can be taken out or put into a needle cylinder protective sleeve without pulling out a needle tube.

According to the purpose of the invention, the following technical scheme is provided: the utility model provides a rotatory fixing device of high pressure syringe cylinder with plunger is spacing, its includes that the cover establishes the cylinder protective sheath in the high pressure syringe cylinder outside and with the fixed complex syringe seat of cylinder protective sheath one end, wherein the syringe seat is provided with a plurality of elasticity plunger pieces that are located cylinder protective sheath radial direction, and the cylinder protective sheath then be provided with elasticity plunger piece complex annular groove.

The technical scheme further comprises the following auxiliary technical scheme on the basis of the technical scheme:

the high-pressure injector further comprises a first cover plate which is used for fixing the rear end of the high-pressure injector needle cylinder, is abutted against and contacted with the needle cylinder seat and is fixed with the needle cylinder protective sleeve, and a flooding plug valve which is positioned between the needle cylinder seat and the first cover plate and is attached to the needle cylinder protective sleeve.

The high-pressure injector is characterized by further comprising a second cover plate for fixing the front end of the high-pressure injector needle cylinder and a flange cover plate sleeved on the outer side of the second cover plate, wherein the flange cover plate is provided with a notch, and the front end of the needle cylinder is provided with a flange matched with the notch.

And the columnar piece is arranged on the flange cover plate and can be correspondingly inserted into the limiting hole in the second cover plate, and the moving direction of the columnar piece is mutually parallel to the central axial direction of the second cover plate and the flange cover plate.

The second cover plate comprises a cover plate hole, a pair of rib plates oppositely arranged at the edge of the cover plate hole, and rotation stopping convex blocks arranged on the corresponding rib plates.

Still including preventing that the direct friction of flange apron and second apron from causing metal damage and being located the friction ring between flange apron and the second apron.

The flange cover plate, the first cover plate and the second cover plate are made of metal materials, and the friction ring is made of wear-resistant materials.

According to the purpose of the invention, another technical scheme is provided: a high pressure injector syringe rotational fixation device with plunger limiting, comprising: the cover is established at the cylinder protective sheath in the high pressure syringe cylinder outside, with cylinder protective sheath one end fixed coordination's syringe seat, with syringe seat fixed coordination and with the fixed first apron of cylinder protective sheath, fixed high pressure syringe cylinder front end and have spacing hole the second apron, the cover establish the flange apron in the second apron outside and install on the flange apron and can correspond the column piece that inserts spacing hole in the second apron, wherein the syringe seat is provided with a plurality of elastic column plug parts that are located cylinder protective sheath radial direction, and the cylinder protective sheath then be provided with elastic plunger spare complex annular groove.

According to the purpose of the invention, another technical scheme is provided: a method of rotationally securing a high pressure syringe barrel with a plunger stop, comprising:

step1: inserting the needle cylinder protective sleeve into the needle cylinder seat, wherein a plurality of elastic plunger pieces are arranged on the needle cylinder seat, and after the needle cylinder protective sleeve is completely inserted into the needle cylinder seat, steel balls at the front end of the elastic plunger pieces can slide into an annular groove of the needle cylinder protective sleeve to form primary fixation;

step2: then the general plug valve at the inner hole of the first cover plate is attached to the needle cylinder protective sleeve through deformation to form secondary fixation;

step3: inserting the high-pressure syringe needle cylinder into the needle cylinder protective sleeve and simultaneously ensuring that the flange direction of the high-pressure syringe needle cylinder faces to the right upper side and is aligned with the mark on the needle cylinder protective sleeve;

step4: turning over the flange cover plate, wherein the notch of the flange cover plate is fit with the flange at the moment, and the flange cover plate and the high-pressure injector needle cylinder rotate simultaneously at the moment;

step5: the flange cover plate is rotated clockwise, after the flange cover plate is rotated by 90 degrees, the columnar head of the columnar piece arranged on the flange cover plate enters the limiting hole of the second cover plate, and theflange cover plate 8 can only rotate clockwise by 90 degrees on thesecond cover plate 7 until the end.

Therefore, the invention has the following characteristics:

the operation is simple and convenient, the error operation is not easy to occur when the needle cylinder is replaced, and the needle cylinder can be taken out or put into the needle cylinder protective sleeve without pulling the needle tube.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is an assembled view of a syringe jacket, syringe mount, and elastomeric plunger assembly of the present invention.

Fig. 2 is a sectional view of fig. 1.

Fig. 3 is a schematic cross-sectional view of the present invention.

Fig. 4 is a side view of fig. 3 and in an initial state.

FIG. 5 is a side view similar to FIG. 4, rotated 90 degrees.

Fig. 6 is a sectional view of the second cover plate and the flange cover plate assembled in the present invention.

Fig. 7 is a structural view of a second cover plate in the present invention.

Fig. 8 is a perspective view of the present invention from a first perspective.

Fig. 9 is a perspective view of the present invention from a second perspective.

Fig. 10 is a cross-sectional view of the present invention with the syringe withdrawn.

Fig. 11 is another cross-sectional view of the present invention to reveal the relationship between the second cover plate and the flange cover plate.

Detailed Description

The technical solution of the present invention will be clearly and completely described by the following detailed description. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.

As shown in fig. 1-11, the present invention provides an embodiment of a high-pressure syringe needle cylinder rotation fixing device with plunger position limitation, which includes a needlecylinder protecting sleeve 1 that is sleeved outside a high-pressuresyringe needle cylinder 4 and is in abutting contact with the rear end of the high-pressuresyringe needle cylinder 4, aneedle cylinder seat 2 that is fixedly matched with one end of the needlecylinder protecting sleeve 1 and is in abutting contact with the needlecylinder protecting sleeve 1, afirst cover plate 5 that is fixedly matched with theneedle cylinder seat 2 and is fixed with the needlecylinder protecting sleeve 1, aflooding valve 6 that is located between theneedle cylinder seat 2 and thefirst cover plate 5 and is attached to the needlecylinder protecting sleeve 1, asecond cover plate 7 that fixes the front end of the high-pressuresyringe needle cylinder 4, aflange cover plate 8 that is sleeved outside thesecond cover plate 7, and a column-shaped member 9 that is installed on theflange cover plate 8 and can be inserted into aposition limiting hole 76 in thesecond cover plate 7 correspondingly. Thefirst cover plate 5 and thesecond cover plate 7 are DSA circular cover plates.

The syringeprotective sleeve 1 is used for preventing the high-pressure syringe 4 under high pressure from bursting, is roughly cylindrical, and the tail end of the syringe protective sleeve is provided with an inclined part, and thesyringe seat 2 is used for installing aspring plunger piece 3 and fixing the syringeprotective sleeve 1 and is connected with the back vertical keel.

Thesyringe mount 2 is provided with a plurality ofelastic plunger elements 3 in the radial direction of the syringeprotective sheath 1, and the syringeprotective sheath 1 is provided with anannular groove 10 cooperating with theelastic plunger elements 3. Theelastic plunger member 3 includes a plunger head, and a spring in abutting contact with one end of the plunger head. Thecolumn 9 includes a column head, and a spring in abutting contact with one end of the column head. The plunger head or cylinder head is preferably a steel ball.

Theflange cover plate 8 is provided with aflange hole 80 at the center, anotch 82 at one end communicating with theflange hole 80 and extending radially, and a pair ofside edges 84 at the other end provided with thecolumn member 9, and the front end of the high-pressure syringe 4 is provided with aflange 40 fitting with thenotch 82.

Thesecond cover 7 includes acover hole 70, a pair ofribs 72 disposed at an edge of thecover hole 70 and at one end, arotation stopping protrusion 74 disposed on thecorresponding rib 72 and stopping the movement of theside edge 84, and alimiting hole 76 disposed on therib 72 and corresponding to thepillar 9.

Syringeprotective sheath 1 passes throughfirst apron 5, insertsyringe seat 2 withsecond apron 7, the rake of syringeprotective sheath 1 andgeneral stopper valve 6 contact this moment, syringeprotective sheath 1 is under the effect of elasticity plunger spare 3, can't be separated fromsyringe seat 2 under the condition of no exogenic action,general stopper valve 6 is in the down Cheng Xingbian of exogenic action on the rake inclined plane of syringeprotective sheath 1, thereby makegeneral stopper valve 6 and syringeprotective sheath 1 stroke face contact, accomplish sealed when fixed syringeprotective sheath 1.

Theflange 40 of the high-pressuresyringe needle cylinder 4 keeps the direction upward, after theflange cover plate 8 is closed, thenotch 82 of theflange cover plate 8 is matched with theflange 40 to form a whole, the initial position is as shown in figure 4, then theflange cover plate 8 is rotated clockwise by 90 degrees as shown in figure 5, all the steps of fixing the needle cylinder are completed, at the moment, the high-pressuresyringe needle cylinder 4 and the needle cylinderprotective sleeve 1 are matched with thelimiting step 12 of the needle cylinderprotective sleeve 1 through the tail end of the high-pressuresyringe needle cylinder 4, and the needle cylinderprotective sleeve 1 is abutted and contacted with theneedle cylinder seat 2, so that the fixation is completed. At the same time, in order to prevent erroneous operation, thecolumn member 9 mounted on theflange cover 8 is slid into thestopper hole 76 of thesecond cover 7 and fixed. In order to prevent thecover flange 8 from being rotated too much (i.e. thecover flange 8 is rotated more than 90 °) when thecover flange 8 is rotated, as shown in fig. 7 and 11, thesecond cover 7 also enables thecover flange 8 to be rotated only 90 ° during the rotation process through therotation stopping protrusions 74, thereby ensuring that the over-rotation condition does not occur.

Preferably, the present invention further comprises afriction ring 92 between theflange cover plate 8 and thesecond cover plate 7 for preventing metal damage due to direct friction between theflange cover plate 8 and thesecond cover plate 7. Theflange cover plate 8, thefirst cover plate 5 and thesecond cover plate 7 are all made of metal materials. Thefriction ring 92 is preferably an abrasion resistant material, more preferably a POM plastic material.

Therefore, on the basis of the structure, the invention also comprises a method which is as follows:

step1: the syringeprotective sleeve 1 is inserted into thesyringe seat 2, and fourelastic plunger pieces 3 are arranged on thesyringe seat 2, after the syringeprotective sleeve 1 is inserted into thesyringe seat 2, the front steel balls of theelastic plunger pieces 3 can slide into theannular groove 10 of the syringeprotective sleeve 1, so that the first layer of fixation is formed on the syringeprotective sleeve 1, namely the fixation of theelastic plunger pieces 3.

Step2: syringeprotective sheath 1 end has an rake, installsfirst apron 5 beforesyringe seat 2, and the hole department offirst apron 5 is equipped with one and can be deformedgeneral stopper valve 6, shouldgeneral stopper valve 6 through deformation laminating syringeprotective sheath 1 completely to it is fixed to form the second floor to syringeprotective sheath 1, and it is fixed to general stopper valve deformation promptly, thereby accomplishes the action of fixing syringeprotective sheath 1, notices: this action merely secures thesyringe sheath 1 and facilitates insertion of the highpressure syringe barrel 4.

Step3: the high-pressure syringe cylinder 4 is inserted into the cylinderprotective sleeve 1, and simultaneously, theflange 40 of the high-pressure syringe cylinder 4 is ensured to face to the right upper side and is aligned with the mark on the cylinderprotective sleeve 1, and a foolproof design is arranged at the position, namely, if theflange 40 does not face to the right upper side, theflange cover plate 8 cannot be turned to the right position.

Step4: theflange cover 8 is turned over, therecess 82 of theflange cover 8 now engaging with theflange 40, and theflange cover 8 and the high-pressure injector syringe 4 can now be rotated simultaneously.

Step5: theflange cover plate 8 is rotated clockwise, after theflange cover plate 8 is rotated by 90 degrees, the columnar head of thecolumnar piece 9 enters the limitinghole 76 of thesecond cover plate 7, thecolumnar piece 9 is installed on theflange cover plate 8, and in Step5, thesecond cover plate 7 is provided with therotation stopping lug 74, so that theflange cover plate 8 can only rotate 90 degrees clockwise on thesecond cover plate 7 until the end.

At this time, the high-pressure syringe 4 and the syringeprotective sleeve 1 are completely fixed, and when the high-pressure syringe 4 is subjected to high pressure, the pressure applied to the high-pressure syringe 4 is completely acted on two ears on two sides of theflange cover plate 8 through theflange cover plate 8.

It should be understood that the above-mentioned embodiments are only illustrative of the technical concepts and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes or modifications made according to the spirit of the main technical scheme of the invention are covered in the protection scope of the invention.

Claims (5)

1. A high pressure syringe cylinder rotation fixture with plunger limiting, comprising: the high-pressure syringe comprises a syringe protective sleeve (1) sleeved on the outer side of a syringe (4) of the high-pressure syringe and a syringe seat (2) fixedly matched with one end of the syringe protective sleeve (1), wherein the syringe seat (2) is provided with a plurality of elastic plunger pieces (3) positioned in the radial direction of the syringe protective sleeve (1), and the syringe protective sleeve (1) is provided with an annular groove (10) matched with the elastic plunger pieces (3);

the syringe further comprises a first cover plate (5) which is fixedly matched with the syringe seat (2) and is fixed with the syringe protective sleeve (1), and a flooding plug valve (6) which is positioned between the syringe seat (2) and the first cover plate (5) and is attached to the syringe protective sleeve (1);

the injection device is characterized by also comprising a second cover plate (7) for fixing the front end of the high-pressure injector needle cylinder (4) and a flange cover plate (8) sleeved outside the second cover plate (7), wherein the flange cover plate (8) is provided with a gap (82), and the front end of the needle cylinder (4) is provided with a flange (40) matched with the gap (82);

the device also comprises a columnar piece (9) which is arranged on the flange cover plate (8) and can be correspondingly inserted into the limiting hole (76) of the second cover plate (7), and the moving direction of the columnar piece (9) is mutually parallel to the central axial direction of the second cover plate (7) and the flange cover plate (8);

a connecting part is arranged between the first cover plate and the second cover plate.

2. The high pressure injector syringe rotational securing device of claim 1, wherein: the second cover plate comprises a cover plate hole, a pair of rib plates oppositely arranged at the edge of the cover plate hole, and rotation stopping convex blocks arranged on the corresponding rib plates.

3. The apparatus of claim 1, further comprising a friction ring disposed between the flange cover plate and the second cover plate for preventing metal damage from direct friction between the flange cover plate and the second cover plate.

4. The high pressure injector syringe rotational fixation of claim 3, wherein: the flange cover plate, the first cover plate and the second cover plate are made of metal materials, and the friction ring is made of wear-resistant materials.

5. The method for rotationally fixing a high-pressure syringe cylinder with a plunger-limited high-pressure syringe cylinder rotational fixing device according to any one of claims 1 to 4, comprising:

step1: inserting the needle cylinder protective sleeve into the needle cylinder seat, wherein a plurality of elastic column plug pieces are arranged on the needle cylinder seat, and after the needle cylinder protective sleeve is completely inserted into the needle cylinder seat, steel balls at the front end of the elastic column plug pieces slide into an annular groove of the needle cylinder protective sleeve to form preliminary fixation;

step2: then the general plug valve at the inner hole of the first cover plate is attached to the needle cylinder protective sleeve through deformation to form secondary fixation;

step3: inserting the high-pressure syringe needle cylinder into the needle cylinder protective sleeve and simultaneously ensuring that the flange direction of the high-pressure syringe needle cylinder faces to the right upper side and is aligned with the mark on the needle cylinder protective sleeve;

step4: turning over the flange cover plate, wherein the notch of the flange cover plate is fit with the flange at the moment, and the flange cover plate and the high-pressure injector needle cylinder rotate simultaneously at the moment;

step5: the flange cover plate is rotated clockwise, after the flange cover plate is rotated by 90 degrees, the flange cover plate (8) is sleeved on the outer side of the second cover plate (7), the columnar head of the columnar piece installed on the flange cover plate enters the limiting hole of the second cover plate, and the flange cover plate (8) can only rotate clockwise by 90 degrees on the second cover plate (7) until the end.

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