CN215875921U - Assembly for rapid pressurization and pressure relief, balloon catheter system and pressure pump thereof - Google Patents

Abstract

The utility model discloses a component for quickly pressurizing and releasing pressure, a balloon catheter system and a pressure pump thereof, wherein the component comprises a push rod; the inner cylinder is sleeved outside the push rod, the push rod can slide in the inner cylinder, a first hole for flowing fluid is formed in the end face of the far end of the inner cylinder, and a stop flange is arranged at the near end of the inner cylinder; the outer cylinder is sleeved outside the inner cylinder, the inner cylinder can slide in the outer cylinder, a second hole corresponding to the first hole is formed in the far end face of the outer cylinder, the outer cylinder comprises a pressure relief section and an actuating section, and a stopping shoulder is arranged at the joint of the pressure relief section and the actuating section; the elastic part is arranged in a space between the actuating sections of the inner cylinder and the outer cylinder, the far end of the elastic part abuts against the stop shoulder, and the near end of the elastic part abuts against the stop flange; and a stopper for fixing the inner cylinder with respect to the outer cylinder. The utility model can be conveniently pushed and quickly retracted by the passage with the small section, can realize large suction force by the passage with the large section, and can be retracted by the elastic piece, thereby saving labor and being quick.

Description

Assembly for rapid pressurization and pressure relief, balloon catheter system and pressure pump thereof

Technical Field

The utility model relates to the field of medical instruments, in particular to an assembly for quickly pressurizing and relieving pressure, a balloon catheter system and a pressure pump thereof.

Background

Interventional therapy and surgery, which are currently advanced and effective disease treatment methods, are developed rapidly, and a method of performing diagnostic imaging, treatment or tissue collection by opening a micro channel with a diameter of several millimeters on skin and blood vessels or through an original channel of a human body under the guidance of image medicine, and inserting a special catheter or instrument to a diseased region, such as a region where a catheter reaches the heart through a blood vessel, is an emerging treatment method between surgical and medical treatments.

The balloon dilatation catheter is needed for interventional therapy and operation, a pressurization and pressure relief system is needed for filling and pressure relief of the balloon catheter, the pressurization and pressure relief are realized through screw transmission in the currently clinically used product, the pressure relief process needs to be operated by hands, the process is complex, the use is inconvenient, and particularly the large-size balloon catheter needs a long-time pressurization and pressure relief process, so that blood vessels are easily blocked for a long time, tissue ischemia is caused, functional disorder is caused, and even life is threatened.

Therefore, there is a strong lack in the art of a new type of rapid pressure increasing and relieving assembly, system or device to achieve rapid pressure increasing and relieving and reduce the time for blocking blood vessels.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an assembly for quickly pressurizing and relieving pressure, a balloon catheter system and a pressure pump thereof. The assembly, the balloon catheter system and the pressure pump can be conveniently pushed and quickly retracted through the small-section channel, large suction force can be realized through the large-section channel, and the assembly is retracted through the elastic piece, so that labor is saved and the pressure pump is quick.

In a first aspect of the utility model, an assembly for rapid pressure boosting and relieving is provided, the assembly comprising a push rod, a distal end of the push rod being provided with a seal; the inner cylinder is sleeved outside the push rod, the push rod can slide in the inner cylinder, a first hole for flowing fluid is formed in the end face of the far end of the inner cylinder, and a stop flange is arranged at the near end of the inner cylinder; the outer cylinder is sleeved outside the inner cylinder, the inner cylinder can slide in the outer cylinder, a second hole corresponding to the first hole is formed in the end face of the far end of the outer cylinder, the outer cylinder comprises a pressure relief section and an actuating section, and a stopping shoulder is arranged at the joint of the pressure relief section and the actuating section; an elastic member disposed in a space between the inner barrel and the actuation section of the outer barrel, wherein a distal end of the elastic member abuts the stop shoulder and a proximal end of the elastic member abuts the stop flange; and a stopper for fixing the inner cylinder with respect to the outer cylinder.

In another preferred embodiment, the stopper is used for controlling the extension and contraction of the elastic member, so that the position relationship between the outer cylinder and the inner cylinder is controlled by the motion state of the elastic member.

In another preferred embodiment, the pressure relief section is a distal slidable section of the inner barrel and the actuation section is a section that facilitates rapid retraction of the inner barrel.

In another preferred embodiment, the elastic member is a spring.

In another preferred example, the length of the spring in a compressed state is 1-8 cm; preferably 3-5 cm.

In another preferred example, the length of the spring in the stretching state is 3-20 cm; preferably, 5-18 cm; more preferably, 8-13 cm.

In another preferred embodiment, a space enclosed between the sealing member of the push rod and the inner cylinder is a first cavity, and a space enclosed between the distal end of the inner cylinder and the outer cylinder is a second cavity.

In another preferred embodiment, the first cavity is an injection cavity and the second cavity is a pressure relief cavity.

In another preferred embodiment, the proximal end of the push rod is provided with a handle for facilitating pushing and pulling the push rod.

In another preferred embodiment, a clamping handle is provided at the proximal end of the outer barrel for facilitating the operator to hold and secure the assembly.

In another preferred embodiment, the inner cylinder and the outer cylinder are coaxial.

In another preferred embodiment, the number of the inner cylinders is one or more.

In another preferred example, the number of the outer cylinders is one or more.

In another preferred embodiment, a groove is provided on the actuating section, which groove cooperates with the stop flange, in which groove the stop flange can slide.

In another preferred example, the stopping piece is arranged on the stopping flange, the stopping piece comprises a buckle, and the actuating section of the outer cylinder is provided with a notch matched with the buckle; under the condition that the buckling piece is matched with the notch, the inner cylinder and the outer cylinder are relatively fixed, under the condition that the buckling piece is separated from the notch, the inner cylinder and the outer cylinder are released from being relatively fixed, and the inner cylinder is quickly retracted under the pushing action of the elastic piece.

In a second aspect of the utility model, a balloon catheter system for rapid pressurization and pressure relief is provided, the system comprising the aforementioned assembly, a balloon, and a balloon catheter for connecting the assembly and the balloon, the proximal end of the balloon catheter being in fluid communication with the second bore of the outer barrel.

In another preferred example, ribs for preventing skidding are arranged on the outer surface of the balloon.

In another preferred embodiment, the number of the ribs is 1-10; preferably, 2.

In another preferred example, a developing ring for displaying the position is arranged on the balloon.

In another preferred example, the number of the developing rings is 1 to 10; preferably, 3.

In another preferred example, the balloon has a diameter of 4-40mm in the expanded state; preferably 20-30 mm.

In another preferred example, the length of the balloon is 8-200 mm; preferably, 15-120 mm; more preferably 35-45 mm.

In a third aspect of the present invention, there is provided a pressure pump for rapid pressurization and pressure relief, the pressure pump comprising the aforementioned assembly, and a snap assembly; the buckle assembly comprises a first buckle part arranged on the push rod and a second buckle part arranged on the inner cylinder and matched with the first buckle part; the relative position of the push rod and the inner cylinder is controlled through the matching of the first buckling part and the second buckling part: the push rod freely slides in the inner cylinder under the condition that the first buckling part and the second buckling part are disengaged; and under the state that the first buckling part and the second buckling part are buckled, the push rod is fixed relative to the inner cylinder.

In another preferred example, the first buckling part is a threaded section; in another preferred embodiment, the second fastening part includes a reset piece, an engagement piece and a pushing piece, wherein the reset piece is fixedly connected with the engagement piece, the engagement piece is used for being in snap fit with the first fastening part, and the pushing piece is fixedly connected to one side of the engagement piece opposite to the reset piece.

In another preferred example, the reset piece is a spring.

In another preferred embodiment, a control key is arranged on the inner cylinder and used for controlling the movement of the second buckling part, one end of the control key is rotatably fixed on the inner cylinder, and the position of the middle part of the control key, which is close to the inner cylinder, is abutted against the second buckling part so as to provide an upward supporting force for the control key.

When the device is used, the other end of the operating key, which is far away from the inner cylinder, is pressed by the hand of an operator, so that downward pressing force is provided for the control key.

In another preferred embodiment, the inner barrel is provided with a baffle plate, the baffle plate is used for protecting the control key and preventing misoperation, the baffle plate is provided with a track, and the outer end of the control key slides along the track.

In another preferred example, the baffle is a curved baffle.

In another preferred example, the rail is provided on a side of the baffle plate close to the control key.

In another preferred embodiment, the track is a recessed channel for receiving an outer end of the control key, the outer end of the control key being received in the recessed channel and slidable along the recessed channel.

It should be noted that the form of the track is not exclusive, but it may also be a convex form, correspondingly, a corresponding groove channel is provided at the outer end of the control key, so that the control key can still slide along the convex track, and so on.

In another preferred example, a buffer spring is arranged in a space enclosed by the track, the inner cylinder and the control key, and is used for buffering the pressing of the control key and accelerating the rebounding of the control key.

In another preferred embodiment, one end of the buffer spring is fixedly connected with the outer end of the control key, and the other end of the buffer spring is fixedly connected with the inner cylinder.

In another preferred example, the buffer spring is disposed along the rail, and the buffer spring extends along the rail.

In another preferred example, a buffer spring is arranged in the track.

In another preferred embodiment, a track is arranged on the baffle, a buffer spring is arranged in the track, the outer end of the control key slides along the track, and the buffer spring is used for buffering the pressing of the control key and accelerating the rebounding of the control key.

In another preferred embodiment, the control key and the pusher are integrally formed.

In another preferred embodiment, the control key and the pusher are two separate parts.

In another preferred embodiment, the pressure pump includes a pressure gauge, a conduit and a three-way valve, the pressure gauge is disposed at the distal end of the outer cylinder and is in fluid communication with the outer cylinder, the proximal end of the conduit is fixedly connected to the end face of the distal end of the outer cylinder and is in fluid communication with the inner cylinder, and the other end of the conduit is connected to the three-way valve.

In another preferred embodiment, the ratio of the cross-sectional areas of the injection cavity and the pressure relief cavity is 0.5-0.95; preferably, 0.6-0.85; more preferably, 0.65 to 0.75.

In another preferred embodiment, the actuating section is arranged on the periphery of the pressure relief section in a superposed manner.

In another preferred embodiment, the actuating section is arranged symmetrically in the radial direction of the pressure pump on the periphery of the pressure relief section.

In another preferred embodiment, the actuating section is disposed against the pressure relief section with a stop shoulder formed therebetween.

In another preferred embodiment, the actuating section comprises at least two separate chambers, i.e. pressure relief chambers.

In another preferred embodiment, the pressure relief chambers are independent of each other.

In another preferred embodiment, a first control knob is provided at the proximal end of the actuation section.

In another preferred embodiment, the inner cylinder is provided with at least two stop flanges corresponding to the relief chamber.

In another preferred embodiment, the stop flanges are independent of each other, and the proximal ends thereof are integrally connected by a second control handle.

In another preferred embodiment, the distal end of the stop flange projects into the discharge chamber, and the stop flange is slidable in the discharge chamber.

In another preferred embodiment, the elastic member is disposed in the pressure relief cavity, and one end of the elastic member abuts against the stop shoulder and the other end of the elastic member abuts against the stop flange of the inner cylinder.

In another preferred embodiment, the stopper includes a housing, a connecting member, and an elastic expansion member.

In another preferred embodiment, the outer shell is fixed to the outer cylinder, and the connecting member and the elastic expansion member are accommodated in the housing.

In another preferred embodiment, the outer casing is in communication with the outer barrel.

In another preferred embodiment, one end of the elastic expansion piece abuts against the housing, and the other end of the elastic expansion piece can penetrate through the actuating section of the outer cylinder to be communicated with the stop flange of the inner cylinder.

In another preferred embodiment, a through hole is provided on the stop flange of the inner cylinder, and the elastic expansion piece is inserted into the inner cavity of the stop flange of the inner cylinder through the through hole.

In another preferred embodiment, the elastic expansion member comprises a spring.

In another preferred embodiment, the elastic expansion member further comprises a pillar.

In another preferred example, the connecting piece connects the elastic expansion pieces into a whole, and the expansion of the elastic expansion pieces can be controlled through the connecting piece.

In another preferred embodiment, the inner cylinder and the outer cylinder are relatively fixed in a state that the elastic expansion part is subjected to a small compression force, namely the elastic expansion part extends into an inner cavity of the stop flange of the inner cylinder; in a state where the elastic expansion member is subjected to a large compression force, that is, the connection member further compresses the elastic expansion member to retract the elastic expansion member from the inner cavity of the stopper flange of the inner cylinder into the outer shell, the inner cylinder is rapidly retracted relative to the outer cylinder by the elastic member.

In another preferred embodiment, the elastic expansion element of the stop element is arranged (substantially) perpendicular to the elastic element.

The main advantages of the utility model include:

(a) fluid is pumped through the cavity with the smaller cross section for pressurization, so that the propulsion is facilitated;

(b) the fluid is recovered through the cavity with the larger cross section for pressure relief, so that the suction force is higher, and the pressure relief is quicker and more convenient;

(c) through the matching of the elastic part with unique structure and the double-cylinder structure (the outer cylinder and the inner cylinder), the high-efficiency, labor-saving and quick retraction and pressure relief are carried out;

(d) the operation is convenient; (e) can set up two limit structure, be used for restricting the relative position of urceolus and inner tube respectively to and the relative position between inner tube and the push rod, thereby avoid misoperation, in order to improve the safety in utilization.

It is to be understood that within the scope of the present invention, the above-described features of the present invention and those specifically described below (e.g., in the examples) may be combined with each other to form new or preferred embodiments. Not to be reiterated herein, but to the extent of space.

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 a perspective view of an assembly for rapid pressure increase and relief in one example of the utility model;

FIG. 2 is a first cross-sectional view of the assembly of FIG. 1 for rapid pressure increase and relief;

FIG. 3 is a second cross-sectional view of the assembly of FIG. 1 for rapid pressure increase and relief;

FIG. 4 is a perspective view of a balloon catheter system for rapid pressurization and pressure relief in one example of the present invention;

FIG. 5 is a first cross-sectional view of the balloon catheter system of FIG. 4 in an initial state for rapid pressurization and pressure relief;

FIG. 6 is a second cross-sectional view of the balloon catheter system of FIG. 4 in an initial state for rapid pressurization and pressure relief;

FIG. 7 is a first cross-sectional view of the balloon catheter system for rapid pressurization and pressure relief of FIG. 4 in a lumen-filled state;

FIG. 8 is a second cross-sectional view of the balloon catheter system for rapid pressurization and pressure relief of FIG. 4 in a lumen-filled state;

FIG. 9 is a first cross-sectional view of the balloon catheter system of FIG. 4 for rapid pressurization and pressure relief in a balloon-expanded state;

FIG. 10 is a second cross-sectional view of the balloon catheter system of FIG. 4 in a balloon-expanded state for rapid pressurization and pressure relief;

FIG. 11 is a first cross-sectional view of the balloon catheter system for rapid pressure pressurization and relief in FIG. 4 in a balloon deflated and outer lumen filled state;

FIG. 12 is a second cross-sectional view of the balloon catheter system for rapid pressure pressurization and relief in FIG. 4 in a balloon deflated and outer lumen filled state;

FIG. 13 is a cross-sectional view of the balloon catheter system for rapid pressurization and pressure relief of FIG. 4;

FIG. 14 is a perspective view of a pressure pump for rapid pressure increase and release in accordance with an embodiment of the present invention;

FIG. 15 is a cross-sectional view of the pressure pump of FIG. 14 in an initial state for rapid pressure increase and release;

FIG. 16 is a cross-sectional view of the pressure pump of FIG. 14 for rapid pressure increase and release in a cavity-filled condition;

FIG. 17 is a cross-sectional view of the pressure pump of FIG. 14 in a pressurized state for rapid pressure increase and release;

FIG. 18 is a first cross-sectional view of the pressure pump of FIG. 14 for rapid pressurization and pressure relief in a pressure relief state, i.e., with the outer chamber filled;

FIG. 19 is a second cross-sectional view of the pressure pump of FIG. 14 for rapid pressurization and pressure relief in a pressure relief state, i.e., with the outer chamber filled;

FIG. 20 is a perspective view of a pressure pump for rapid pressure increase and release in accordance with another embodiment of the present invention;

FIG. 21 is a front view of the pressure pump of FIG. 20 for rapid pressurization and depressurization;

FIGS. 22 and 23 are sectional views of the pressure pump for rapid pressure increase and release in FIG. 21, taken along section A-A;

FIG. 24 is a cross-sectional view taken in section B-B of the pressure pump for rapid pressure increase and release of pressure of FIG. 21;

FIG. 25 is a cross-sectional view of the pressure pump for rapid pressure increase and release of pressure of FIG. 21 in a central section taken parallel to the page;

FIG. 26 is a left side view of the pressure pump of FIG. 21 for rapid pressure increase and release;

fig. 27 is a sectional view of the pressure pump for rapid pressure increase and release in section C-C of fig. 26.

In the drawings, each symbol is as follows:

1-a push rod;

2-inner cylinder;

3-outer cylinder;

4-an elastic member;

5-a stop;

6-a first hole;

7-a second well;

8-pressure relief section;

9-an actuation section;

10-a stop shoulder;

11-lumen;

12-an outer cavity;

13-a stop flange;

14-a groove;

15-a fastener;

16-a balloon;

17-a balloon catheter;

18-ribs;

19-a developing ring;

20-a thread segment;

21-a reset piece;

22-a fitting;

23-a push member;

24-control keys;

25-a baffle plate;

26-a track;

27-a buffer spring;

28-pressure gauge;

29-a catheter;

30-three-way valve;

31-a first control handle;

32-a second control handle;

33-a housing;

34-a connector;

35-an elastic expansion member;

36-support.

Detailed Description

The inventor of the present invention has conducted extensive and intensive studies and, through extensive screening, has developed for the first time an assembly for rapid pressurization and pressure relief, and a balloon catheter system and a pressure pump therefor. Compared with the prior art, the assembly, the balloon catheter system and the pressure pump thereof realize different pressurizing cavities and pressure relief cavities through a double-cylinder design, wherein the sectional area of the pressurizing cavity is smaller than that of the pressure relief cavity, so that the assembly can be conveniently pushed and quickly retracted through a small-section channel, and simultaneously realize large suction force through a large-section channel, and the assembly is retracted through the elastic piece, so that the assembly is labor-saving and quick, and the assembly is completed on the basis.

The utility model will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, the drawings are schematic and, thus, the apparatus and devices of the present invention are not limited by the size or scale of the schematic.

It is to be noted that in the claims and the description of the present patent, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the use of the verb "comprise a" to define an element does not exclude the presence of another, same element in a process, method, article, or apparatus that comprises the element.

Example 1

The assembly for rapid pressure increase and release of pressure of the present embodiment is shown in fig. 1-3. The component for quickly pressurizing and relieving pressure comprises a push rod 1, an inner cylinder 2, an outer cylinder 3, an elastic part 4 and a stop piece 5. The push rod 1 is a long and thin rod, the inner cylinder 2 is sleeved outside the push rod 1, the push rod 1 can slide in the inner cylinder 2, a first hole 6 for flowing fluid is formed in the end face of the far end of the inner cylinder 2, a sealing element such as a rubber pad is arranged at the far end of the push rod 1, so that dense connection is formed between the push rod 1 and the inner cylinder 2, the fluid only enters and exits through the first hole 6 in the end face of the inner cylinder 2, and a handle is arranged at the near end of the fluid and used for conveniently pushing and pulling the push rod 1. The proximal end of the inner barrel 2 is also provided with a stop flange 13. The outer barrel 3 is sleeved outside the inner barrel 2, the inner barrel 2 can slide in the outer barrel 3, a second hole 7 corresponding to the first hole 6 is formed in the end face of the far end of the outer barrel 3, and a clamping handle is arranged at the near end of the outer barrel and used for facilitating an operator to hold the fixing component. The outer cylinder 3 comprises a pressure relief section 8 and an actuating section 9, wherein the pressure relief section 8 is a section of the inner cylinder 2 in which the distal end can slide, and the actuating section 9 is a section for promoting the inner cylinder 2 to retract rapidly, wherein a stop shoulder 10 is arranged at the joint of the pressure relief section 8 and the actuating section 9. In the present embodiment, the number of the outer cylinders 3 and the number of the inner cylinders 2 are both one, and both are coaxially arranged. It is understood that the number of the outer cylinder 3 may be plural, the number of the inner cylinder 2 may be plural, the inner cylinder 2 and the outer cylinder 3 may be arranged not coaxially, and the like. For example, the number of the outer cylinders 3 is one, the number of the inner cylinders 2 is 3, and 3 inner cylinders 2 are provided in 1 outer cylinder 3.

The space enclosed between the sealing element of the push rod 1 and the inner cylinder 2 is an inner cavity 11, and the space enclosed between the far end of the inner cylinder 2 and the outer cylinder 3 is an outer cavity 12. Wherein the inner cavity 11 is an injection cavity, and the outer cavity 12 is a pressure relief cavity.

The resilient element 4 is arranged in the space between the inner barrel 2 and the actuating section 9 of the outer barrel 3, wherein the distal end of the resilient element 4 abuts against the stop shoulder 10 and the proximal end of the resilient element 4 abuts against the stop flange 13. A groove 14 is provided on the actuating section 9, which groove 14 cooperates with the stop collar 13, the stop collar 13 being slidable in the groove 14.

In the embodiment, the elastic part 4 is a spring, and the length of the spring in a compressed state is 1-8 cm; preferably, 3-5 cm; the length of the film in the stretching state is 3-20 cm; preferably, 5-18 cm; more preferably, 8-13 cm. It will be appreciated that the resilient member 4 may also be a spring or the like.

A stop 5 is provided on the stop flange for fixing the inner barrel 2 relative to the outer barrel 3. The stop member 5 comprises a snap member 15, and the actuating section 9 of the outer cylinder 3 is provided with a notch which is matched with the snap member 15; under the condition that the buckling piece 15 is matched with the notch, the inner cylinder 2 and the outer cylinder 3 are relatively fixed, under the condition that the buckling piece 15 is separated from the notch, the inner cylinder 2 and the outer cylinder 3 are released from relative fixation, and the inner cylinder 2 is quickly retracted under the pushing action of the elastic piece 4.

In the present embodiment, the latch 15 is a trigger structure, and when the wrench is pulled down, the latch 15 is disengaged from the notch on the outer cylinder 3, and when the wrench is released, the latch 15 is engaged with the notch on the outer cylinder 3 by an elastic member such as a spring.

Example 2

The balloon catheter system for rapid pressurization and pressure relief of this embodiment is shown in fig. 4-13. The balloon catheter system includes the assembly as described in example 1, a balloon 16, and a balloon catheter 17 for connecting the assembly and the balloon 16. The proximal end of the balloon catheter 17 is in fluid communication with the second bore 7 of the outer barrel 3 and the distal end is in fluid communication with the balloon 16.

The outer surface of the balloon 16 is provided with ribs 18 for anti-slip. The number of ribs 18 is 1-10; preferably, 2. The ribs 18 expand or contract with the balloon 16. A visualization ring 19 for displaying the position is also provided on the balloon 16. The number of the developing rings 19 is 1 to 10; preferably, 3. The diameter of the balloon 16 in the expanded state is 4-40 mm; preferably 20-30 mm. The length of the balloon 16 is 8-200 mm; preferably, 15-120 mm; more preferably 35-45 mm.

When the balloon catheter 17 system is used, firstly, the initial state is realized, the balloon 16 is in a contracted state, and the volumes of the inner cavity 11 and the outer cavity 12 are both zero, as shown in fig. 5-6; secondly, in a liquid filling state, the push rod 1 is withdrawn backwards, fluid is sucked into the inner cylinder 2, the inner cavity 11 is filled, and as shown in figures 7-8, the balloon 16 is still in a contraction state; in a pressurized state, the push rod 1 is pushed forward to inject the fluid in the inner cavity 11 into the balloon 16, and the balloon 16 is expanded, as shown in fig. 9-10; finally, the pressure is released, the snap fastener 15 is controlled to be disengaged from the notch of the outer cylinder 3, the inner cylinder 2 and the outer cylinder 3 are disengaged, the inner cylinder 2 is retracted backwards relative to the outer cylinder 3 under the action of the elastic element 4, the push rod 1 in the inner cylinder 2 is also retracted together, and the fluid in the balloon 16 is sucked into the outer cavity 12, as shown in fig. 11-12.

Example 3

The pressure pump for rapid pressure increase and release of pressure of the present embodiment is shown in fig. 14 to 19. The pressure pump comprises an assembly as described in embodiment 1, a snap-on assembly, a pressure gauge 28, a conduit 29 and a three-way valve 30. The pressure gauge 28 is arranged at the far end of the outer cylinder 3 and is communicated with the fluid of the outer cylinder 3, the near end of the conduit 29 is fixedly connected with the end face of the far end of the outer cylinder 3 and is communicated with the fluid of the inner cylinder 2, and the other end of the conduit 29 is connected with the three-way valve 30.

The pressure pump for rapid pressurization and pressure relief in the embodiment achieves rapid and labor-saving pressurization and pressure relief through the assembly for rapid pressurization and pressure relief as described in embodiment 1. When in use, firstly, the initial state is realized, and the volumes of the inner cavity 11 and the outer cavity 12 are both zero, as shown in fig. 15; secondly, in a liquid filling state, the push rod 1 is withdrawn backwards, fluid is sucked into the inner cylinder 2, and the inner cavity 11 is filled, as shown in fig. 16; again in the pressurised state, the push rod 1 is pushed forward, using the fluid in the chamber 11 for pressurisation, as shown in figure 17; finally, the pressure is released, the snap fastener 15 is released from the notch of the outer cylinder 3, the inner cylinder 2 and the outer cylinder 3 are released from the fixed relationship, the inner cylinder 2 is retracted backward relative to the outer cylinder 3 under the action of the elastic member 4, the push rod 1 in the inner cylinder 2 is also retracted together, and the pressurized fluid is sucked into the outer cavity 12, as shown in fig. 18-19.

The pressure pump for rapid pressurization and pressure relief in the embodiment realizes the motion control between the push rod 1 and the inner cylinder 2 through the buckle assembly. The buckling component comprises a thread section 20 arranged on the push rod 1 and a buckling part which is arranged on the inner cylinder 2 and matched with the thread section 20; the relative positions of the push rod 1 and the inner cylinder 2 are controlled through the matching of the thread section 20 and the buckling part: under the state that the thread section 20 and the buckling part are disengaged, the push rod 1 freely slides in the inner cylinder 2; the push rod 1 is fixed to the inner cylinder 2 in a state where the thread 20 is engaged with the locking portion.

The buckling part comprises a resetting piece 21, an embedding piece 22 and a pushing piece 23, wherein the resetting piece 21 is fixedly connected with the embedding piece 22, the embedding piece 22 is used for being in buckling fit with the threaded section 20, and the pushing piece 23 is fixedly connected to one side, opposite to the resetting piece 21, of the embedding piece 22. The return member 21 is a spring.

The inner cylinder 2 is provided with a control key 24 for controlling the movement of the buckling part, one end of the control key 24 is rotatably fixed on the inner cylinder 2, and the middle part of the control key 24 and the position close to the inner cylinder 2 are propped against the buckling part to provide upward supporting force for the control key 24. When in use, the operator presses the other end of the pressure control key 24, which is far away from the inner cylinder 2, to provide downward pressing force for the control key 24.

The inner cylinder 2 is further provided with a bent baffle 25, the baffle 25 is used for protecting the control key 24 and preventing misoperation, the baffle 25 is provided with a track 26, and the outer end of the control key 24 slides along the track 26. The rail 26 is provided on the side of the shutter 25 close to the control key 24. The rail 26 is a recessed channel for receiving the outer end of the control key 24, and the outer end of the control key 24 is received in and slidable along the recessed channel. A buffer spring 27 is provided in a space surrounded by the rail 26, the inner tube 2, and the control key 24, for buffering the depression of the control key 24 and the rebound of the acceleration control key 24. One end of the buffer spring 27 is fixedly connected with the outer end of the control key 24, and the other end is fixedly connected with the inner cylinder 2. The buffer spring 27 is disposed along the rail 26, and the buffer spring 27 extends along the rail 26.

Example 4

The pressure pump for rapid pressure increase and release of pressure of the present embodiment is shown in fig. 20 to 27. The pressure pump is similar to the embodiment 3, but different from the embodiment, the actuating section 9 of the outer cylinder 3 is overlapped on the outer periphery of the inner cylinder 2 to further shorten the axial distance of the pressure pump, so that the operation is more practical.

In the present embodiment, the actuating section 9 of the outer cylinder 3 is two separate cavities independent of the pressure relief section 8, which are arranged symmetrically in the radial direction of the pressure pump on the periphery of the pressure relief section 8 and abut against the pressure relief section 8, with a stop shoulder 10 being formed between the actuating section 9 and the pressure relief section 8. Preferably, a first control knob 31 is provided at the proximal end of the actuating section 9.

Correspondingly, the inner cylinder 2 is provided with two separate stop flanges 13. The proximal ends of the stop flanges 13 are integrally connected by a second control knob 32, the distal ends of which project into the cavity. A stop flange 13 is inserted into a cavity of the outer cylinder 3 and can slide in the cavity. Preferably, the distance between the outer wall of the stop flange 13 and the inner wall of the cavity is 0.5-2 mm.

The elastic element 4 is arranged in the cavity, one end of the elastic element is abutted against the stop shoulder 10, and the other end of the elastic element is abutted against the stop flange 13 of the inner cylinder 2.

The stopper includes a housing 33, a connecting member 34, and an elastic expansion member 35. The outer casing 33 is fixed to the outer cylinder 3, and the connecting member 34 and the elastic expansion member 35 are accommodated in the outer casing 33. The outer casing 33 communicates with the outer cylinder 3. One end of the elastic expansion piece 35 is abutted against the outer shell 33, and the other end of the elastic expansion piece 35 can pass through the actuating section 9 of the outer cylinder 3 to be communicated with the stop flange 13 of the inner cylinder 2. A through hole is provided in the stopper flange 13 of the inner cylinder 2, and the elastic expansion member 35 is inserted into the inner cavity of the stopper flange 13 of the inner cylinder 2 through the through hole. The elastic expansion member 35 includes a spring. Optionally, a post 36 is also provided, the lower end of the spring abutting the post 36. The elastic expansion element 35 of the stop is arranged perpendicular to the elastic element 4. The link 34 is integrally connected to a post 36 of the elastic expansion member 35, and the expansion and contraction of the elastic expansion member 35 are controlled by the up and down movement of the link 34. When the elastic expansion piece 35 bears a small compression force, namely the elastic expansion piece 35 extends into the inner cavity of the stop flange 13 of the inner cylinder 2, the inner cylinder 2 and the outer cylinder 3 are relatively fixed; in the state in which the elastic expansion element 35 is subjected to a large compressive force, i.e. the connection 34 compresses the elastic expansion element 35 further to withdraw it from the inner cavity of the stop flange 13 of the inner cylinder 2 into the outer shell 33, the inner cylinder 2 is rapidly withdrawn relative to the outer cylinder 3 under the action of the elastic element 4.

All documents referred to herein are incorporated by reference into this application as if each were individually incorporated by reference. Furthermore, it should be understood that various changes and modifications of the present invention can be made by those skilled in the art after reading the above teachings of the present invention, and these equivalents also fall within the scope of the present invention as defined by the appended claims.

Claims (10)

1. An assembly for rapid pressure increase and release, characterized in that the assembly comprises

The far end of the push rod is provided with a sealing element;

the inner cylinder is sleeved outside the push rod, the push rod can slide in the inner cylinder, a first hole for flowing fluid is formed in the end face of the far end of the inner cylinder, and a stop flange is arranged at the near end of the inner cylinder;

the outer cylinder is sleeved outside the inner cylinder, the inner cylinder can slide in the outer cylinder, a second hole corresponding to the first hole is formed in the end face of the far end of the outer cylinder, the outer cylinder comprises a pressure relief section and an actuating section, and a stopping shoulder is arranged at the joint of the pressure relief section and the actuating section;

an elastic member disposed in a space between the inner barrel and the actuation section of the outer barrel, wherein a distal end of the elastic member abuts the stop shoulder and a proximal end of the elastic member abuts the stop flange; and

a stop for securing the inner barrel relative to the outer barrel.

2. An assembly according to claim 1, wherein a recess is provided in the actuating section for cooperation with the stop flange, the stop flange being slidable in the recess.

3. The assembly of claim 1, wherein said stop is disposed on said stop flange, said stop comprising a catch, said actuating section of said outer barrel being provided with a notch for engaging said catch; under the condition that the buckling piece is matched with the notch, the inner cylinder and the outer cylinder are relatively fixed, under the condition that the buckling piece is separated from the notch, the inner cylinder and the outer cylinder are released from being relatively fixed, and the inner cylinder is quickly retracted under the pushing action of the elastic piece.

4. A balloon catheter system for rapid pressure pressurization and relief, the system comprising the assembly of any one of claims 1-3, a balloon, and a balloon catheter for connecting the assembly and the balloon, the balloon catheter having a proximal end in fluid communication with the second bore of the outer barrel.

5. The system of claim 4, wherein the balloon has ribs on an outer surface thereof for anti-slip.

6. The system of claim 4, wherein the balloon is provided with a visualization ring for displaying the location.

7. A pressure pump for rapid pressure increase and relief, comprising an assembly according to any one of claims 1-3, and a snap-on assembly;

the buckle assembly comprises a first buckle part arranged on the push rod and a second buckle part arranged on the inner cylinder and matched with the first buckle part; the relative position of the push rod and the inner cylinder is controlled through the matching of the first buckling part and the second buckling part: the push rod freely slides in the inner cylinder under the condition that the first buckling part and the second buckling part are disengaged; and under the state that the first buckling part and the second buckling part are buckled, the push rod is fixed relative to the inner cylinder.

8. The pressure pump of claim 7, wherein the first catch is a threaded segment; the second buckling part comprises a resetting piece, an embedded piece and a pushing piece, wherein the resetting piece is fixedly connected with the embedded piece, the embedded piece is used for being in buckling fit with the first buckling part, and the pushing piece is fixedly connected to one side of the embedded piece, which is opposite to the resetting piece.

9. The pressure pump as claimed in claim 7, wherein a control key is provided on the inner cylinder for controlling the movement of the second locking portion, one end of the control key is rotatably fixed to the inner cylinder, and a position of a middle portion of the control key, which is close to the inner cylinder, abuts against the second locking portion to provide an upward supporting force for the control key.

10. The pressure pump as claimed in claim 9, wherein a baffle is provided on the inner cylinder, the baffle is used for protecting the control key from misoperation, a rail is provided on the baffle, and the outer end of the control key slides along the rail.

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