CN119075148A - Fluid drive devices and conveying systems with pressure limiting components - Google Patents

Abstract

The application discloses a fluid driving device with a pressure limiting assembly and a conveying system, wherein the fluid driving device with the pressure limiting assembly comprises a pressure cylinder body, a pushing rod and a pressure limiting assembly, wherein the pressure cylinder body is used for containing fluid to be conveyed, an output port of the pressure cylinder body is communicated with a first interface and a bypass port, the first interface is operatively connected to a balloon device, the balloon device can be driven by the fluid to switch between a contracted state and an expanded state, the pushing rod is in sealing fit with the pressure cylinder body and can axially move to achieve fluid conveying of the pressure cylinder body and build pressure, and the pressure limiting assembly is communicated with the bypass port and has a sealing state for sealing the bypass port and a pressure releasing state for releasing the fluid through the bypass port when the specified pressure is reached. According to the technical scheme disclosed by the application, through the arrangement of the pressure limiting assembly, the problem of overhigh fluid pressure in a pipeline is avoided, and the pressure limiting device is simple and compact in structure and convenient to operate.

Description

Fluid drive device with pressure limiting assembly and delivery system

Technical Field

The present application relates to the field of medical devices, and in particular to fluid drive devices with pressure limiting assemblies and delivery systems.

Background

Fluid-driven devices are common in the medical field, particularly in interventional procedures. The fluid drive device is capable of establishing pressure in the tubing to meet the delivery of the fluid or use requirements of the distal instrument. For example, in TAVI, TAVR, balloon valve expansion, etc. procedures, the pressure established by the fluid-driven device can effect balloon inflation.

In order to meet the high operating pressures, manually operated fluid drives are generally designed with a high drive ratio, which reduces the drive torque and increases the difficulty of pressure control. For example in the scenario mentioned above, it is assumed that the balloon has been filled with a sufficient amount of liquid and that the pressure inside the balloon is already suitable, but that an incorrect control of the pressure by the operator may give rise to an overpressure inside the balloon, with a certain risk.

Disclosure of Invention

In order to solve the above technical problems, the present application discloses a fluid driving device with a pressure limiting assembly, comprising:

A pressure cylinder for receiving a fluid to be delivered, an output port of the pressure cylinder being in communication with a first interface and a bypass port, the first interface being operatively connected to a balloon device, the balloon device being switchable between a contracted state and an expanded state under the drive of the fluid;

the pushing rod is in sealing fit with the pressure cylinder body, and can axially move to realize fluid conveying of the pressure cylinder body and build pressure;

and the pressure limiting assembly is communicated with the bypass opening and is provided with a sealing state for sealing the bypass opening and a pressure relief state for releasing fluid through the bypass opening when the specified pressure is reached.

The following provides several alternatives, but not as additional limitations to the above-described overall scheme, and only further additions or preferences, each of which may be individually combined for the above-described overall scheme, or may be combined among multiple alternatives, without technical or logical contradictions.

Optionally, the pressure limiting assembly includes:

the pressure limiting shell is internally provided with a pressure relief cavity, and the pressure relief cavity is communicated with the output port through the bypass port;

The sealing piece is movably arranged in the pressure relief cavity, in the sealing state, the sealing piece is positioned at a sealing position for sealing the bypass opening, and in the pressure relief state, the sealing piece is positioned at a pressure relief position;

And a retainer provided inside the pressure-limiting housing and having a deformable structure, the retainer having a sealing configuration for retaining the seal in the sealing position and a corresponding pressure release configuration.

Optionally, the pressure limiting assembly further includes a pressure regulating structure, the pressure regulating structure is mounted on the pressure limiting housing and is linked with the retainer, and the pressure regulating structure is used for regulating a sealing form of the retainer so as to change a corresponding fluid pressure of the retainer entering the pressure releasing position.

Optionally, the pressure regulating structure includes the pressure regulating pole, pressure regulating pole one end extends into in the pressure release chamber with the holder is mutually supported, and the other end extends to the pressure limiting casing outside, the pressure regulating pole with the pressure limiting casing adjusts the cooperation in order to adjust the sealing form of holder.

Optionally, the pressure regulating structure further comprises a sliding seat slidably arranged in the pressure release cavity, one end of the sliding seat is matched with the pressure regulating rod, and the other end of the sliding seat is matched with the retainer.

Optionally, the pressure release chamber is cylindric, the external diameter of sliding seat with the internal diameter adaptation in pressure release chamber.

Optionally, the pressure regulating pole is installed on through screw-thread fit on the pressure limiting casing, the pressure regulating pole changes the distance that oneself visited into in the pressure release chamber in order to adjust the sealed form of holder.

Optionally, the retainer is a compression spring, and the pressure regulating structure changes the corresponding fluid pressure of the sealing element entering the pressure release position by regulating the preload of the compression spring.

Optionally, the sealing element is a sphere, the sealing element seals the bypass opening in a sealing position and bears the fluid pressure in the pipeline under the action of the retainer, and the sealing element is far away from the bypass opening in a pressure relief position and forms a pressure relief channel, so that the fluid in the pipeline enters the pressure relief cavity through the pressure relief channel.

Optionally, the pressure limiting assembly includes an overflow channel, and the overflow channel communicates the pressure release cavity with the outside of the pressure limiting housing.

Optionally, the pressure regulating structure further comprises a sliding seat slidably arranged in the pressure release cavity, the overflow channel at least comprises a flow passage arranged on the side wall of the sliding seat and an overflow hole arranged on the pressure limiting shell, and the flow passage axially extends on the side edge of the sliding seat and is communicated with the pressure release cavity and the overflow hole.

Optionally, the overflow groove is distributed in a plurality of in the circumference direction of sliding seat, the overflow groove sets up as follows:

at least one flow channel aligned with the overflow hole, or

All the overflow grooves avoid the overflow holes.

Optionally, the pressure limiting casing includes the body that is used for forming the pressure release chamber with seal the lid of pressure release chamber, pressure regulating structure including set up in pressure regulating pole on the lid, the overflow hole set up in on the lid and just be close to pressure regulating pole.

Optionally, the device further comprises a switching valve, wherein the switching valve is provided with:

The first interface;

The second interface is used for communicating with the output port;

The bypass port is used for connecting the pressure limiting assembly;

the switching valve is provided with a pressure limiting position and an opposite pressure maintaining position which are communicated with the bypass port and the output port.

The output port of the pressure cylinder is connected with the second interface through an output pipe.

Optionally, an output port of the pressure cylinder is communicated with a pressure gauge.

Optionally, one of the push rod and the pressure cylinder is provided with a prompt member, the other one is provided with a response member, and when the push rod moves to a preset position relative to the pressure cylinder, the prompt member can interact with the response member to prompt the conveying progress.

The application discloses a conveying system, which comprises a fluid driving device with a pressure limiting assembly, a catheter assembly extending from the fluid driving device to the distal end and a balloon device arranged at the distal end of the catheter assembly, wherein the balloon device comprises a balloon body, and the fluid driving device is used for injecting fluid into the balloon body so as to convert the balloon body from the contracted state to the expanded state.

According to the technical scheme disclosed by the application, through the arrangement of the pressure limiting assembly, the problem of overhigh fluid pressure in a pipeline is avoided, and the pressure limiting device is simple and compact in structure and convenient to operate.

Specific advantageous technical effects will be further explained in the detailed description in connection with specific structures or steps.

Drawings

FIG. 1 is a schematic illustration of a fluid drive device with a pressure limiting assembly in one embodiment;

FIG. 2 is a schematic view of the pressure limiting assembly of FIG. 1;

FIG. 3 is a schematic diagram of the assembly of the pressure limiting assembly of FIG. 1;

fig. 4 and 5 are schematic views illustrating different states of the voltage limiting assembly in fig. 1;

FIGS. 6 and 7 are schematic diagrams illustrating overflow channel arrangements in one embodiment;

fig. 8 to 10 are schematic structural views of a reminder in different embodiments;

FIG. 11 is a schematic illustration of a fluid drive device with an adapter assembly in one embodiment;

fig. 12 to 14 are schematic views illustrating the fitting assembly of fig. 11 and the pressure cylinder from different viewing angles;

fig. 15 to 17 are schematic views of the structure of the adapting portion and the fixing portion under different viewing angles.

Reference numerals in the drawings are described as follows:

1. The pressure cylinder, 11, the output port, 12, the output pipe, 13, the switching valve, 131, the first interface, 132, the second interface, 14, the pushing rod, 151, the prompting piece, 1511, the prompting position, 1512, the prompting plug-in piece, 1513, the prompting cylinder, 1514, the avoiding port, 152, the response piece, 1521, the response end, 16, the plug-in strip, 17 and the limit strip;

2. pressure limiting assembly, 21, pressure limiting shell, 211, pressure releasing cavity, 212, bypass port, 214, overflow hole, 215, body, 216, cover, 22, sealing element, 221, pressure releasing channel, 23, retainer, 24, pressure regulating structure, 241, pressure regulating rod, 242, sliding seat, 2421, overflow groove, 243, overflow channel;

3. The device comprises an adapting assembly, 31, a fixing part, 311, an inserting cavity, 312, an inserting groove, 313, a fastener, 314, a limiting latch, 315, an adapting window, 32, an adapting part, 321, an adapting port, 322, a connecting port, 323, a liquid outlet, 33, a pressure gauge, 34, a connecting channel and 341.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1to 7, the present application discloses a fluid driving device with a pressure limiting assembly, comprising:

A pressure cylinder 1 for containing a fluid to be delivered, the output port 11 of the pressure cylinder being in communication with a first interface 131 and a bypass port 212, the first interface 131 being operatively connected to a balloon device, the balloon device being capable of being switched between a contracted state and an expanded state under the drive of the fluid;

The pushing rod 14 is in sealing fit with the pressure cylinder 1, and the pushing rod 14 can axially move to realize fluid delivery of the pressure cylinder 1 and build pressure;

the pressure limiting assembly 2 is communicated with the bypass port 212, and the pressure limiting assembly 2 has a sealing state for closing the bypass port 212 and a pressure release state for releasing the fluid through the bypass port when a specified pressure is reached.

According to the technical scheme disclosed by the application, through the arrangement of the pressure limiting assembly 2, the problem of overhigh fluid pressure in a pipeline is avoided, and the pressure limiting assembly is simple and compact in structure and convenient to operate. The pressure cylinder 1 can be arranged as a prefill, i.e. the fluid is stored in the pressure cylinder 1 in advance, or the pressure cylinder 1 can be arranged as an empty, i.e. the fluid is filled into the pressure cylinder 1 when needed. The filling mode can adopt a mode of injecting fluid into the pressure cylinder body in a pressurizing way or a mode of establishing negative pressure in the pressure cylinder body to suck the fluid. The advantage of the above arrangement is that the form and the way of use of the product can be adjusted according to different properties of the fluid, improving the adaptability.

In the setting details of the pressure limiting assembly 2, the fluid driving device comprises a pressure cylinder 1 with an output port 11 and the pressure limiting assembly 2, the pressure limiting assembly 2 comprising:

the pressure limiting shell 21 is internally provided with a pressure relief cavity 211, and the pressure relief cavity 211 is communicated with the output port 11 through a bypass port 212;

a seal 22 movably disposed within the relief cavity 211, the seal 22 having a sealing position (see fig. 4) closing the bypass port 212 and an opposite relief position (e.g., fig. 5);

A retainer 23, which is provided inside the pressure-limiting housing 21 and is of a deformable structure, the retainer 23 having a sealing configuration (see fig. 4) for retaining the seal 22 in a sealing position and a corresponding pressure release configuration (e.g., fig. 5).

The pressure limiting assembly 2 is communicated with the output port 11 through the bypass port 212, namely, the pressure of fluid output by the pressure cylinder 1 can be directly transmitted to the sealing element 22, the sealing element 22 is kept at a sealing position under the action of the retaining element 23, the sealing element 22 seals the bypass port 212 and bears the fluid pressure in a pipeline under the action of the retaining element 23 in the sealing position, when the fluid pressure exceeds the retaining effect of the retaining element 23, the sealing element 22 overcomes the retaining effect of the retaining element 23 to enter a pressure release position and drives the retaining element 23 to enter a pressure release mode, the sealing element 22 is far away from the bypass port 212 in the pressure release position and forms a pressure release channel 221, and the fluid in the pipeline enters the pressure release cavity 211 through the pressure release channel 221. Because of the establishment of the pressure relief channel 221, the fluid pressure of the bypass port 212 and the output port 11 is reduced, thereby achieving the pressure limiting effect. After the fluid pressure at the bypass port 212 and the output port 11 has been reduced to some extent, the retainer 23 is able to resume its sealed configuration by virtue of the deformable structure, thereby continuing to retain the seal 22 in the sealed position and maintaining the line pressure.

In the drawings, the pressure limiting assembly 2 further includes a pressure regulating structure 24, where the pressure regulating structure 24 is mounted on the pressure limiting housing 21 and is linked with the retainer 23, and the pressure regulating structure 24 is used for regulating the sealing form of the retainer 23 to change the corresponding fluid pressure of the sealing member 22 entering the pressure releasing position. The pressure regulating assembly is able to vary the holding effect of the retainer 23 by adjusting the sealing configuration of the retainer 23, thereby varying the corresponding fluid pressure of the seal 22 into the pressure relief position.

In a specific arrangement of the pressure regulating assembly, referring to fig. 2 to 5, the pressure regulating structure 24 includes a pressure regulating rod 241, one end of the pressure regulating rod 241 extends into the pressure release cavity 211 to cooperate with the retainer 23, and the other end extends to the outside of the pressure limiting housing 21, and the pressure regulating rod 241 is in adjustment cooperation with the pressure limiting housing 21 to adjust the sealing configuration of the retainer 23. Further, the pressure adjusting rod 241 is mounted on the pressure limiting housing 21 through a threaded fit, and the pressure adjusting rod 241 changes the distance of penetrating into the pressure release cavity 211 to adjust the sealing form of the retainer 23. It will be appreciated that the pressure regulating lever 241 may have an identification component disposed thereon to identify the location of the placement for different scenarios. The identification component may be an identification ring or a color area of different colors, for example, a balloon of a first type would need to have the pressure regulating lever 241 set to a position of a certain color and a balloon of a second type would need to have the pressure regulating lever 241 set to a position of another color. The marks are used for indicating the self axial position of the pressure regulating rod 241, and similarly, the pressure regulating rod 241 can be further provided with a limiting structure for limiting the self axial position. The adjusting rod 241 and the pushing rod 14 all realize their functions through axial movement, so that the axial marks or the limiting structures of the adjusting rod 241 and the pushing rod can be mutually referred to. For example, the axial movement of the pressure adjusting rod 241 shown in fig. 2 to 5 is realized by screw-fitting, and the limiting structure can refer to the setting mode of the prompting piece of the pushing rod 14 which is arranged by screw in fig. 8, and the setting mode of the prompting piece can be specifically described below. In addition to the screw thread arrangement, the pressure adjusting lever 241 may be configured to be directly pushed, and the limiting structure may refer to the arrangement manner of the prompting element shown in fig. 9 or fig. 10, and the arrangement manner of the prompting element may refer to the following specific description.

Independently of each other, the retainer 23 is a compression spring and the pressure regulating structure 24 changes the corresponding fluid pressure of the sealing member 22 into the pressure relief position by adjusting the preload of the compression spring.

In order to better adapt to the arrangement of the pressure regulating rod 241 and the retainer 23, the pressure regulating structure 24 further includes a sliding seat 242 slidably disposed in the pressure release chamber 211, where one end of the sliding seat 242 is mutually matched with the pressure regulating rod 241, and the other end is mutually matched with the retainer 23. The sliding seat 242 can prevent the deformation effect of the retainer 23 from being affected by the adjusting movement of the adjusting lever 241. While relief cavity 211 may also provide a guide for sliding seat 242. The pressure release cavity 211 is cylindrical, and the outer diameter of the sliding seat 242 is matched with the inner diameter of the pressure release cavity 211. At least over the sliding travel of the sliding seat 242, the pressure relief cavity 211 is cylindrical. In the drawing, the relief cavity 211 is reduced in caliber near the bypass port 212 to better fit the seal 22. In this embodiment, the seal 22 is a sphere.

As will be appreciated from the above description, the pressure limiting assembly 2 regulates the pressure by releasing the fluid into the pressure releasing cavity 211, so that in practical use, the triggering opportunity of the pressure limiting assembly 2 is not much, the volume of the actual pressure releasing cavity 211 is not required to be too large, and the pressure releasing cavity 211 can be closed to improve the working stability of the pressure limiting assembly 2. In some situations, however, where a greater number of pressure limiting assembly 2 actions may occur or the amount of fluid being depressurized is greater, it may be desirable to provide relief passage 243 to avoid an increase in pressure within pressure relief cavity 211. As shown in fig. 6 to 7, the pressure limiting assembly 2 includes an overflow passage 243, and the overflow passage 243 communicates the pressure release chamber 211 and the outside of the pressure limiting housing 21.

In the arrangement details, the overflow hole 214 may be provided in the pressure limiting housing 21 to release the excessive fluid, and in actual use, a corresponding pipe or a sensor or a valve body may be connected to the overflow hole 214 to guide, detect and control the fluid.

In the embodiment shown in the drawings, the pressure regulating structure 24 further includes a sliding seat 242 slidably disposed in the pressure relief cavity 211, and the overflow channel 243 includes at least a through-flow groove 2421 disposed on a sidewall of the sliding seat 242 and an overflow hole 214 disposed on the pressure limiting housing 21, where the through-flow groove 2421 extends axially on a side edge of the sliding seat 242 and communicates with the pressure relief cavity 211 and the overflow hole 214. The flow-through groove 2421 can prevent the release of the fluid from being affected by the provision of the slide seat 242. In the drawings, a plurality of through-flow grooves 2421 are distributed in the circumferential direction of the sliding seat 242, and each through-flow groove 2421 may be uniformly spaced or may be arranged according to a preset rule. In mating detail, referring to fig. 6-7, at least one flow channel 2421 is aligned with overflow aperture 214 to achieve rapid release of fluid. Reference is also made to further embodiments in which all the overflow channels 2421 avoid the overflow aperture 214. Avoiding the influence of the external environment on the fluid in the pressure relief cavity 211. It should be noted that in the case where the overflow grooves 2421 are provided so as to avoid the overflow holes 214, it is necessary to keep the overflow passages 243 open by means of a fitting, for example, the slide seat 242 is retracted as compared with the pressure limiting housing 21 or the overflow grooves 2421 communicating with the side walls are provided at the end portions of the slide seat 242.

In the details of the overflow hole 214, the pressure limiting housing 21 includes a body 215 for forming the pressure relief cavity 211 and a cover 216 for closing the pressure relief cavity 211, the pressure regulating structure 24 includes a pressure regulating rod 241 disposed on the cover 216, and the overflow hole 214 is disposed on the cover 216 and adjacent to the pressure regulating rod 241.

Independently of the above, the pressure limiting housing 21 may be configured as a transparent structure, so that the operator can directly observe whether the pressure release chamber 211 contains fluid and the volume of the fluid, to directly guide the progress of the treatment process.

In some usage scenarios, the pressure limiting assembly 2 does not need to participate in the working process in the whole course, and in one embodiment, the fluid driving device further includes a switching valve 13, where the switching valve 13 is provided with:

A first interface 131;

a second interface 132 for communicating with the output port 11;

a bypass port 212 for connecting the pressure limiting assembly 2;

the switching valve 13 has a pressure limiting position and an opposite pressure maintaining position communicating the bypass port 212 and the output port 11.

In a specific connection implementation manner, the pressure cylinder 1 is provided with an output pipe 12 extending from the output port 11, the output pipe 12 is provided with a switching valve 13, the pressure limiting assembly 2 is arranged on the switching valve 13, and the switching valve 13 is provided with a pressure limiting position and an opposite pressure maintaining position which are communicated with the bypass port 212 and the output port 11. The operation of the pressure limiting assembly 2 can be turned on or off as needed by the operation of the switching valve 13.

In the pipeline, a pressure gauge can be further arranged to detect the fluid pressure in real time, and in the principle of communication, the output port 11 of the pressure cylinder 1 is communicated with the pressure gauge.

Through the above description, the pressure limiting assembly 2 can effectively improve the safety of fluid delivery, and meanwhile, the pressure limiting assembly can also directly improve the use experience. In actual operation, the operator only needs to preset the pressure limiting assembly 2, and can directly drive the push rod 14 at will to realize the delivery in the fluid delivery process, and the pressure limiting assembly 2 can automatically release the redundant pressure and the fluid in the pipeline at a proper position. Compared with the prior art that the operator needs to drive the pushing rod 14 and confirm the conveying progress and the corresponding instrument, the technical scheme of the application effectively improves the use experience of the operator.

In addition to the pressure control mentioned above, the pressure cylinder in the application can also control the liquid conveying progress by limiting the motion travel of the push rod. In some embodiments, one of the push rod 14 and the pressure cylinder 1 is provided with a prompting element, and the other is provided with a response element, and when the push rod 14 moves to a preset position relative to the pressure cylinder 1, the prompting element can interact with the response element to prompt the conveying progress. The prompt piece and the response piece can be mutually matched in a mutually interference fit mode of structures such as insertion, clamping and bonding, or in a mutually displacement fit mode such as magnetic attraction, friction and adsorption. In particular implementations, there are also various forms.

In the embodiment referring to fig. 8, the prompting element 151 is disposed on the pushing rod 14, and the prompting element 151 can axially adjust its position on the pushing rod 14, and abuts against the pressure cylinder 1 when the pushing rod 14 reaches a predetermined position, so as to achieve limiting. In this embodiment, the push rod 14 is threaded or directly advanced. The pushing rod 14 is provided with a thread on the circumferential surface, which is different from the above thread function for realizing axial pushing of the pushing rod 14, and the thread in this embodiment is used for realizing position adjustment of the prompting element 151 relative to the pushing rod 14, and an operator can adjust the relative position of the prompting element 151 relative to the pushing rod 14 according to the use requirement. The function of the response piece is fulfilled by the axial end face of the pressure cylinder 1.

In the embodiment of fig. 9, the cue member 151 includes a plurality of cue locations 1511 disposed on the push rod 14 and a cue insert 1512 capable of cooperating with the cue locations 1511. The cue insert 1512 engages the cue position 1511 and abuts the pressure cylinder 1 when the push rod 14 reaches a predetermined position. In this embodiment, the push rod 14 is threaded or directly advanced. The cue position 1511 is in a practical configuration a detent or collar provided on the side wall of the push rod 14. The cue insert 1512 is in a plug-in fit with a cue location 1511. The cue insert 1512 is flexibly connected to the pressure cylinder 1 or other component, lost in a convenient-to-access manner. The operator in this embodiment is able to adjust the relative position of the cue insert 1512 with respect to the push rod 14 as needed for use. The function of the response piece is fulfilled by the axial end face of the pressure cylinder 1.

Referring to the embodiment of fig. 10, cue member 151 includes a plurality of cue locations 1511 disposed on push rod 14 and a cue insert 1512 that is capable of cooperating with cue locations 1511. In this embodiment, the pushing rod 14 is directly pushed and can rotate circumferentially. Multiple cue locations 1511 may be provided directly on push rod 14 or may be implemented by a separate cue barrel 1513. The response member 152 includes a response end 1521 extending to the cue position 1511 and interfering with a corresponding cue position 1511, the response end 1521 having a retracted state permitting axial free movement of the push rod 14 and a corresponding interfering state. The state switching of the responsive end 1521 may be accomplished by the self-movement of the responsive member 152, such as the removal and installation of the responsive member 152 relative to the pressure vessel 1. The pushing rod 14 may be engaged, for example, as shown in the drawings, so that the respective presentation positions 1511 communicate with each other in the axial direction through the escape opening 1514. The escape ports 1514 of the respective presentation positions 1511 are aligned with each other in the movement direction of the push rod 14, and the response end 1521 has an escape state in which the escape ports 1514 are aligned and an interference state in which the escape ports 1514 are avoided. The push rod 14 is free to move in the axial direction when the responsive end 1521 is in the retracted state, and the axial travel of the push rod 14 is limited when the responsive end 1521 is in the interference state. The push rod 14 rotates on its own axis to switch the responsive end 1521 into the dodged state or the interfered state. In the drawings, each cue position 1511 is larger in axial dimension than the axial dimension of the responsive end 1521. I.e. after the responsive end 1521 enters the interference state, the push rod 14 is still free to move within the axial space of the corresponding alert position 1511.

It will be appreciated from the above embodiments that the function of the cue element and the response element is to cue, adjust and limit the axial travel of the push rod, i.e. the delivery progress of the fluid. This is particularly important in situations where, for example, the transport process needs to be suspended, where, for example, the transport process enters a phase where special attention is required, where, for example, the transport process enters a phase where precise control is required, where, for example, the transport process approaches or has reached an end point, etc. Based on the above description, the prompting element and the response element may also serve as an axial limiting structure or a mark of the pressure adjusting rod 241, and since the pressure adjusting rod 241 and the pushing rod 14 are both in an axial movement structure, the basic principle is similar, and a person skilled in the art can apply the scheme of the prompting element to the setting of the pressure adjusting rod 241 according to the above description without objection, which is not repeated here.

In connection with the above description, it will be appreciated that the present application also discloses a delivery system comprising a fluid driving device with a pressure limiting assembly according to the above-mentioned technical solution, a catheter assembly extending distally from the fluid driving device, and a balloon device arranged at the distal end of the catheter assembly, the balloon device comprising a balloon body, the fluid driving device being adapted to inject a fluid into the balloon body for transferring the balloon body from said contracted state to an expanded state. Specific details are set forth above and are not repeated here. Similarly, the fluid-driven device of the present application may also be applied to a prosthetic heart valve delivery system. The delivery system of the artificial heart valve comprises the fluid driving device with the pressure limiting assembly, the catheter assembly extending from the fluid driving device to the distal end and the balloon device arranged at the distal end of the catheter assembly, wherein the balloon device comprises a balloon body, and the fluid driving device is used for injecting fluid into the balloon body so as to convert the balloon body from the contracted state to the expanded state.

In addition to the optimization of the piping, with reference to fig. 11 to 17, the present application discloses a fluid driving device with an adapter assembly 3, comprising a pressure cylinder 1 with an output port 11 and an adapter assembly 3 arranged on the pressure cylinder 1, the adapter assembly 3 comprising:

A fixing part 31 inserted and mounted on the distal end side of the pressure cylinder 1;

the adapting part 32 is connected with the fixing part 31, an adapting port 321, a connection port 322 and a liquid outlet 323 which are mutually communicated are arranged in the adapting part 32, the adapting port 321 is used for sealing and screwing the pressure gauge 33, and the liquid outlet 323 is used for outputting fluid to the far end;

the connection channel 34 communicates the output port 11 with the connection port 322.

The fixing part 31 connects the fixing part and the adapting part 32 on the pressure cylinder 1, and the plugging arrangement is convenient for adapting to the existing product. The adapting portion 32 can provide a rich interface, overcoming the problems of insufficient expansion capability and adaptability of existing products. In other embodiments, the mounting location of the pressure gauge 33 may also be used to mount components that are needed in actual use, such as safety valve components, pressure regulating components, fluid supplementing components, and the like. According to the technical scheme disclosed by the application, through the arrangement of the adapting assembly 3, a structural foundation is provided for flexible arrangement of the fluid driving device, and the use experience is improved.

In the arrangement details of the adapter assembly 3, reference may be made to the accompanying drawings, in which the adapter portion 32 and the fixing portion 31 are integrally constructed. In the actual product, the adapting portion 32 and the fixing portion 31 may be provided separately and connected to each other, or may be directly connected or through an intermediate member.

In the setting details of the fixing portion 31, referring to an embodiment, the fixing portion 31 includes a plugging cavity 311 with a semi-closed structure, the shape of the inner space of the plugging cavity 311 is mutually matched with the distal end side of the pressure cylinder 1, and the fixing portion 31 is axially abutted against and circumferentially limited by the plugging cavity 311 and the pressure cylinder 1.

The plugging cavity 311 can provide a stable connection link and realize a basic positioning effect. In this embodiment, axial limitation is achieved by plugging the two, circumferential limitation can be achieved by optimizing the shapes of the two, and in the embodiment shown in the drawings, the distal end side of the pressure cylinder 1 is provided with an axially extending plugging strip 16, a plugging groove 312 corresponding to the plugging strip 16 is arranged in the plugging cavity 311, and after the plugging strip 16 and the plugging groove 312 are corresponding in place, a fastening member 313 penetrates through the side wall of the plugging cavity 311 via the outer side of the fixing part 31 to be connected with the plugging strip 16. The plug strip 16 and the plug groove 312 can simultaneously provide axial and circumferential limiting, and the arrangement of the fastening members 313 penetrating through the fitting clearance between the effect components can improve the stability of installation, and further, the plug strip 16 is provided with a plurality of plug strips and is arranged around the output port 11, and the plug groove 312 is correspondingly arranged with the plug strip 16.

Independent of the above arrangement, in the embodiment referring to the drawings, the side wall of the pressure cylinder 1 is provided with the axially extending limit bar 17, the side wall inner side of the plugging cavity 311 is provided with the limit latch 314 matched with the limit bar 17, and in the axial plugging process of the fixing portion 31 and the pressure cylinder 1, the limit latch 314 and the limit bar 17 slide mutually and limit the circumferential positions of the fixing portion 31 and the pressure cylinder 1. The stop latches 314 and stop bars 17 are primarily used to provide circumferential stops. In detail, the limit bars 17 are arranged in groups and a plurality of groups are arranged on the side wall of the pressure cylinder 1, and each group comprises a plurality of limit bars 17 which are arranged side by side. The advantage of this arrangement is that the mating position of the fastening part 31 and the pressure cylinder 1 can be flexibly adjusted under permissible conditions, for example to the desired circumferential position during the plugging process in order to achieve the plugging of both. Referring to fig. 11 and 12, the limit bar 17 may be disposed at other positions, such as a holding portion of the pressure cylinder 1, in addition to the position where it is engaged with the insertion cavity 311. The pressure cylinder can increase the friction force of the pressure cylinder in a handheld state, and is convenient to hold. The arrangement and the above circumferential limit structure can be independently arranged or combined, for example, the plugging cavity 311 and the pressure cylinder 1 are not limited in the circumferential direction, the plugging strip 16 and the plugging groove 312 allow circumferential multiple-position matching, the limit latch 314 and the limit strip 17 allow circumferential multiple-position matching combination mode to achieve multiple-position limiting, and for example, the plugging cavity 311 and the pressure cylinder 1, the plugging strip 16 and the plugging groove 312, the limit latch 314 and the limit strip 17 allow circumferential multiple-position matching combination mode to achieve multiple-position limiting.

In order to achieve a flexible arrangement of the docking channel 34, the side wall of the docking cavity 311 is provided with an adapter window 315 for exposing the outlet 11. In the drawings, the limiting latch 314 is provided at a side edge of the fitting window 315. The arrangement flexibly uses the component structure and simplifies the component layout.

In the arrangement details of the fitting portion 32, reference is made to an embodiment in which the docking channel 34 extends through the interiors of the fitting portion 32 and the fixing portion 31. This arrangement can provide a more overall appearance. However, the design and production costs, the processing steps, the sealing requirements for the adapter assembly 3 and the adapter requirements for the pressure cylinder 1 are correspondingly increased. Thus, as can also be seen with reference to the drawings, the docking channel 34 extends from the outlet 11 to the outside of the fixing portion 31 and bypasses the outside of the adapter portion 32. In a specific implementation manner, the adapting assembly 3 comprises a connecting tube 341, the connecting tube 341 is communicated with the connecting port 322 from the fixed part 31 by the side surface of the adapting, and a connecting channel 34 is arranged in the connecting tube 341.

In the embodiment shown in the drawings, the adapting port 321, the connection port 322 and the liquid outlet 323 are all disposed at the distal end of the adapting portion 32, where the adapting port 321 and the liquid outlet 323 are disposed opposite to each other, and the connection port 322 is disposed therebetween. The caliber of the adapting port 321 is larger than that of the connecting port 322 and the adapting port 321, the connecting port 322 and the liquid outlet 323 are respectively or jointly communicated with the adapting port 321, and the communicating position is eccentrically arranged and close to the far end compared with the axis of the adapting port 321. In detail, referring to fig. 13, the extension paths of the adapting port 321 and the liquid outlet port 323 are identical. Referring to fig. 17, the port 322 is inclined at an angle B ranging from 45 degrees to 80 degrees as compared to the axis of the fitting portion 32, which is more convenient for the arrangement with the port channel 34. The inclination angle B is often expressed as 50 degrees to 75 degrees in an actual product. In the drawings, the inclination angle B is 70 degrees.

In the overall form, as shown with reference to fig. 16, the extending direction of the fitting portion 32 and the extending direction of the fixing portion 31 intersect and form a fitting angle a in the range of 120 degrees to 180 degrees. In actual products, it is often shown to be 130 degrees to 175 degrees. In the figures, the fitting angle a is 150 degrees. This setting can let auxiliary assembly have a more suitable observation angle for the art person, makes things convenient for the development of treatment process.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description. When technical features of different embodiments are embodied in the same drawing, the drawing can be regarded as a combination of the embodiments concerned also being disclosed at the same time.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application.

Claims (10)

1. A fluid drive device with a pressure limiting component, characterized in that it comprises: A pressure cylinder, used to contain the fluid to be delivered, wherein the output port of the pressure cylinder is connected to the first interface and the bypass port, wherein the first interface is operably connected to the balloon device, and the balloon device can be switched between a contracted state and an expanded state under the drive of the fluid; A push rod, which is in sealing cooperation with the pressure cylinder, and the push rod can move axially to realize fluid delivery and pressure building of the pressure cylinder; A pressure limiting component is connected to the bypass port, and the pressure limiting component has a sealing state for closing the bypass port and a pressure relief state for releasing the fluid through the bypass port when a specified pressure is reached. 2. The fluid driving device with a pressure limiting component according to claim 1, wherein the pressure limiting component comprises: A pressure-limiting housing, wherein a pressure-relief chamber is provided inside the pressure-limiting housing, and the pressure-relief chamber is connected with the output port through the bypass port; A sealing member movably disposed in the pressure relief chamber, wherein in the sealed state, the sealing member is located at a sealing position closing the bypass port, and in the pressure relief state, the sealing member is at a pressure relief position; The retaining member is arranged inside the pressure-limiting housing and is a deformable structure. The retaining member has a sealing form for retaining the sealing member at the sealing position and a corresponding pressure relief form. 3. According to the fluid driving device with a pressure limiting component according to claim 1, the pressure limiting component also includes a pressure regulating structure, the pressure regulating structure is installed on the pressure limiting housing and is linked with the retaining member, and the pressure regulating structure is used to adjust the sealing shape of the retaining member to change the corresponding fluid pressure of the seal entering the pressure relief position. 4. The fluid driving device with a pressure limiting component according to claim 3 is characterized in that the pressure regulating structure includes a pressure regulating rod, one end of the pressure regulating rod extends into the pressure relief chamber and cooperates with the retaining member, and the other end extends to the outside of the pressure limiting shell, and the pressure regulating rod and the pressure limiting shell are adjusted to cooperate to adjust the sealing shape of the retaining member. 5. The fluid drive device with a pressure limiting component according to claim 4 is characterized in that the pressure regulating structure also includes a sliding seat slidably arranged in the pressure relief chamber, one end of the sliding seat cooperates with the pressure regulating rod, and the other end cooperates with the retaining member. 6. The fluid drive device with a pressure limiting component according to claim 2 is characterized in that the seal is a sphere, and in the sealing position, the seal blocks the bypass port and withstands the fluid pressure in the pipeline under the action of the retaining member; in the pressure relief position, the seal is away from the bypass port and forms a pressure relief channel, and the fluid in the pipeline enters the pressure relief chamber through the pressure relief channel. 7. The fluid drive device with a pressure limiting component according to claim 1, characterized in that it also includes a switching valve, and the switching valve is provided with: the first interface; A second interface, used to communicate with the output port; The bypass port is used to connect the pressure limiting component; The switching valve has a pressure-limiting position communicating with the bypass port and the output port and a relative pressure-maintaining position. 8. The fluid driving device with a pressure limiting component according to claim 1, characterized in that the output port of the pressure cylinder is connected to a pressure gauge. 9. According to the fluid driving device with a pressure limiting component according to claim 1, a prompt member is provided on one of the push rod and the pressure cylinder, and a response member is provided on the other, and when the push rod moves to a preset position relative to the pressure cylinder, the prompt member can interact with the response member to indicate the progress of delivery. 10. A delivery system, characterized in that it comprises a fluid-driven device with a pressure-limiting component according to any one of claims 1 to 9, a catheter component extending distally from the fluid-driven device, and the balloon device arranged at the distal end of the catheter component, wherein the balloon device comprises a balloon body, and the fluid-driven device is used to inject fluid into the balloon body to convert the balloon body from the contracted state to the expanded state.