CN220378936U - High-speed pneumatic pulse valve and medical instrument - Google Patents

Abstract

The utility model provides a high-speed pneumatic pulse valve and a medical instrument, and relates to the technical field of medical instruments. The high-speed pneumatic pulse valve comprises a rotating shaft, a shell, a front end cover, a rear end cover, a first sealing plate and a driving piece; the rotating shaft is in transmission connection with the driving piece; the rotary shaft is provided with a first runner and a second runner, the front end cover is provided with a first vent, the side wall of the first sealing plate is provided with a second vent, the shell is provided with a third vent and a fourth vent, and the third vent and the fourth vent are arranged at intervals along the circumferential direction of the shell; one end of the first flow channel is in fluid communication with the first air vent, one end of the second flow channel is in fluid communication with the second air vent, and the driving piece drives the rotating shaft to rotate so as to switch the first flow channel to be in fluid communication with the third air vent or the fourth air vent, and the second flow channel is correspondingly in fluid communication with the fourth air vent or the third air vent. The high-speed pneumatic pulse valve provided by the utility model solves the technical problem of short service life of the pneumatic valve in the prior art.

Description

High-speed pneumatic pulse valve and medical instrument

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a high-speed pneumatic pulse valve and a medical instrument.

Background

Vitreoretinal surgical consoles typically include pneumatic valves and manifolds to provide reciprocating cutter motion in a dual-action vitrectomy probe. Pneumatic valves and manifolds selectively provide actuation pressure and venting to each side of the diaphragm in an alternating sequence to provide dual actuation operation. The pneumatic valve is switched between supply pressure and air exhaust by a pair of pneumatic tubes connected between the probe and the valve manifold. As shown in fig. 1, a conventional pneumatic valve is provided to switch between a first position in which a pressurized air supply is connected to port a and an air exhaust is connected to port B, and a second position in which a pressurized air supply is supplied to port B and an air exhaust is connected to port a. Between the first and second positions, conventional pneumatic valves are in a transitional state. Typically, a reciprocating spool or poppet valve is provided to switch the pneumatic valve back and forth between a first position and a second position to alternately open and close ports in the valve body that are routed to fittings in the manifold and connected to tubing leading to the vitrectomy probe. The reciprocation of the spool or poppet valve is typically caused electromechanically at a high repetition rate corresponding to the cutting rate of the vitrectomy probe. For example, reciprocation rates typically can exceed 5000 cuts per minute (83 Hz), and rubber rings used for sealing are easily damaged during reciprocation, reducing the service life of the pneumatic valve.

Disclosure of Invention

The utility model aims to provide a high-speed pneumatic pulse valve and a medical instrument, so as to solve the technical problem of short service life of a pneumatic valve in the prior art.

In order to solve the technical scheme, the technical scheme provided by the utility model is as follows:

in a first aspect, the present utility model provides a high-speed pneumatic pulse valve comprising a rotary shaft, a housing, a front end cover, a rear end cover, a first sealing plate and a driving member;

the shell is provided with a channel, the front end cover and the rear end cover are respectively arranged at two ends of the channel, and the first sealing plate is positioned between the shell and the rear end cover;

one end of the rotating shaft extends into the channel, and the other end of the rotating shaft penetrates through the first sealing plate and the rear end cover to be in transmission connection with the driving piece;

the rotary shaft is provided with a first flow passage and a second flow passage, the front end cover is provided with a first air vent, the side wall of the first sealing plate is provided with a second air vent, the side wall of the passage is provided with a third air vent and a fourth air vent, and the third air vent and the fourth air vent are arranged at intervals along the circumferential direction of the shell;

one end of the first flow channel is in fluid communication with the first air vent, one end of the second flow channel is in fluid communication with the second air vent, the driving piece drives the rotating shaft to rotate so as to switch the first flow channel to be in fluid communication with the third air vent or the fourth air vent, and the second flow channel is correspondingly in fluid communication with the fourth air vent or the third air vent.

Still further, the method further comprises the steps of,

a first ventilation groove and a second ventilation groove are formed in the inner wall of the shell;

the first ventilation groove and the second ventilation groove are oppositely arranged and are respectively communicated with the third air vent and the fourth air vent.

Still further, the method further comprises the steps of,

the high-speed pneumatic pulse valve further comprises a driving structure, and the driving structure is in transmission connection with the rotating shaft so as to drive the rotating shaft to move along the axial direction;

the third air ports, the fourth air ports, the first air grooves and the second air grooves are all arranged in a plurality, the third air ports are arranged at intervals along the axial direction of the rotating shaft, and the fourth air ports, the first air grooves and the second air grooves are arranged in one-to-one correspondence with the third air ports;

the cross-sectional areas of the plurality of first ventilation grooves are different, and the cross-sectional areas of the plurality of second ventilation grooves are different.

Still further, the method further comprises the steps of,

the first flow channel comprises a first section and a second section, the first section extends along the axial direction of the rotating shaft, and the second section is communicated with the first section and is arranged at an included angle with the first section.

Still further, the method further comprises the steps of,

the second flow channel comprises a third section, a fourth section and a fifth section, the third section extends along the axial direction of the rotating shaft, the fourth section and the fifth section are respectively communicated with the two ends of the third section, and the fourth section and the fifth section are all arranged at an included angle with the third section.

Still further, the method further comprises the steps of,

a sealing element is clamped between the first sealing plate and the rotating shaft.

Still further, the method further comprises the steps of,

the high-speed pneumatic pulse valve further comprises a second sealing plate and a third sealing plate;

the second sealing plate and the third sealing plate are respectively positioned at two ends of the shell, and are sleeved with the rotating shaft;

and a sealing element is clamped between the second sealing plate and the rotating shaft, and a sealing element is clamped between the third sealing plate and the rotating shaft.

Still further, the method further comprises the steps of,

the inner walls of the first sealing plate, the second sealing plate and the third sealing plate are respectively provided with a mounting groove, and the sealing piece is mounted in the mounting grooves.

In a second aspect, the utility model provides a medical device comprising a high-speed pneumatic pulse valve as defined in any one of the preceding claims.

In summary, the technical effects achieved by the utility model are analyzed as follows:

the utility model provides a high-speed pneumatic pulse valve which comprises a rotating shaft, a shell, a front end cover, a rear end cover, a first sealing plate and a driving piece, wherein the rotating shaft is arranged on the shell; the shell is provided with a channel, the front end cover and the rear end cover are respectively arranged at two ends of the channel, and the first sealing plate is positioned between the shell and the rear end cover; one end of the rotating shaft extends into the channel, and the other end of the rotating shaft penetrates through the first sealing plate and the rear end cover to be in transmission connection with the driving piece; the rotary shaft is provided with a first runner and a second runner, the front end cover is provided with a first vent, the side wall of the first sealing plate is provided with a second vent, the side wall of the channel is provided with a third vent and a fourth vent, and the third vent and the fourth vent are arranged at intervals along the circumferential direction of the shell; one end of the first flow channel is in fluid communication with the first air vent, one end of the second flow channel is in fluid communication with the second air vent, and the driving piece drives the rotating shaft to rotate so as to switch the first flow channel to be in fluid communication with the third air vent or the fourth air vent, and the second flow channel is correspondingly in fluid communication with the fourth air vent or the third air vent. The shell is provided with a channel, and the rotating shaft penetrates through the channel and is in transmission connection with the driving piece, so that the rotating shaft can rotate in the channel around the axis of the rotating shaft. The rotary shaft is provided with a first flow passage and a second flow passage, the first flow passage is in fluid communication with a first air port arranged on the front end cover, and fluid can flow into or out of the first flow passage from the first air port; the second flow channel is in fluid communication with a second air vent arranged on the first sealing plate, so that fluid can flow into or out of the second flow channel from the second air vent; the shell is provided with a third air port and a fourth air port which are arranged at intervals along the circumferential direction of the shell, when the driving piece drives the rotating shaft to rotate, the positions of the first runner and the second runner can be switched, so that the first runner is switched to be in fluid communication with the third air port or the fourth air port, and the second runner is correspondingly communicated with the fourth air port or the third air port; that is, the second flow channel is in fluid communication with the fourth air port when the first flow channel is in fluid communication with the third air port, and the second flow channel is in fluid communication with the third air port when the first flow channel is in fluid communication with the fourth air port. Further, the first air vent and the second air vent are both air inlets, and the third air vent and the fourth air vent are both air outlets correspondingly; or the first air port and the second air port are air outlets at the same time, and the third air port and the fourth air port are air inlets at the same time. The change of the flowing direction of the fluid is realized through the rotary motion of the rotary shaft, so that the friction damage to the rubber ring in the reciprocating process is avoided, and the service life of the high-speed pneumatic pulse valve is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the internal structure of a high-speed pneumatic pulse valve according to a first embodiment of the present utility model;

FIG. 2 is a schematic diagram of a high-speed pneumatic pulse valve according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a housing in a high-speed pneumatic pulse valve according to a first embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a high-speed pneumatic pulse valve according to a second embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a high-speed pneumatic pulse valve with a rotation shaft on the left side according to a second embodiment of the present utility model;

FIG. 6 is a cross-sectional view of the left side of the housing in a high-speed pneumatic pulse valve according to a second embodiment of the present utility model;

fig. 7 is a schematic structural diagram of a high-speed pneumatic pulse valve with a rotation shaft on the right side according to a second embodiment of the present utility model;

FIG. 8 is a cross-sectional view of the right side of the housing in a high-speed pneumatic pulse valve according to a second embodiment of the present utility model;

FIG. 9 is a schematic diagram of a high pressure air inlet in a high speed pneumatic pulse valve according to a second embodiment of the present utility model;

fig. 10 is a schematic structural diagram of a spline shaft sleeve in a high-speed pneumatic pulse valve according to a second embodiment of the present utility model.

Icon:

100-rotating shaft; 110-a first flow channel; 120-a second flow channel; 130-an elastic member; 140-spline shaft sleeve; 200-a housing; 210-channel; 211-third vent; 212-a fourth air vent; 213-a first vent slot; 214-a second vent slot; 220-bearings; 300-front end cap; 310-a first vent; 400-a rear end cover; 500-a first sealing plate; 510-a second vent; 600-driving piece; 520-seals; 710-a second sealing plate; 711-high pressure air inlet; 720-a third sealing plate; 800-centering plate; 610-coupling; 900-mounting plate.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

Example 1

Vitreoretinal surgical consoles typically include pneumatic valves and manifolds to provide reciprocating cutter motion in a dual-action vitrectomy probe. Pneumatic valves and manifolds selectively provide actuation pressure and venting to each side of the diaphragm in an alternating sequence to provide dual actuation operation. The pneumatic valve is switched between supply pressure and air exhaust by a pair of pneumatic tubes connected between the probe and the valve manifold. A conventional pneumatic valve is provided to switch between a first position in which the pressurized air supply is connected to port a and the air exhaust is connected to port B, and a second position in which the pressurized air supply is supplied to port B and the air exhaust is connected to port a. Between the first and second positions, conventional pneumatic valves are in a transitional state. Typically, a reciprocating spool or poppet valve is provided to switch the pneumatic valve back and forth between a first position and a second position to alternately open and close ports in the valve body that are routed to fittings in the manifold and connected to tubing leading to the vitrectomy probe. The reciprocation of the spool or poppet valve is typically caused electromechanically at a high repetition rate corresponding to the cutting rate of the vitrectomy probe. For example, reciprocation rates typically can exceed 5000 cuts per minute (83 Hz), and rubber rings used for sealing are easily damaged during reciprocation, reducing the service life of the pneumatic valve.

In view of this, referring to fig. 1 and 2, the high-speed pneumatic pulse valve according to the embodiment of the present utility model includes a rotary shaft 100, a housing 200, a front end cover 300, a rear end cover 400, a first sealing plate 500, and a driving member 600; the housing 200 has a channel 210, and the front and rear covers 300 and 400 are respectively mounted at both ends of the channel 210, and the first sealing plate 500 is located between the housing 200 and the rear cover 400; one end of the rotation shaft 100 extends into the channel 210, and the other end passes through the first sealing plate 500 and the rear end cover 400 to be in transmission connection with the driving piece 600; the rotary shaft 100 is provided with a first flow passage 110 and a second flow passage 120, the front end cover 300 is provided with a first air vent 310, the side wall of the first sealing plate 500 is provided with a second air vent 510, the side wall of the channel 210 is provided with a third air vent 211 and a fourth air vent 212, and the third air vent 211 and the fourth air vent 212 are arranged at intervals along the circumferential direction of the shell 200; one end of the first flow channel 110 is in fluid communication with the first vent 310, one end of the second flow channel 120 is in fluid communication with the second vent 510, and the driving member 600 drives the rotation shaft 100 to rotate to switch the first flow channel 110 to be in fluid communication with the third vent 211 or the fourth vent 212, and the second flow channel 120 is in fluid communication with the fourth vent 212 or the third vent 211, respectively. The housing 200 has a channel 210, and the rotating shaft 100 passes through the channel 210 and is in transmission connection with the driving member 600, so that the rotating shaft 100 can rotate around its own axis in the channel 210. The rotary shaft 100 is provided with a first flow passage 110 and a second flow passage 120, the first flow passage 110 is in fluid communication with a first air port 310 arranged on the front end cover 300, so that fluid can flow into or out of the first flow passage 110 from the first air port 310; the second flow channel 120 is in fluid communication with a second air vent 510 provided in the first seal plate 500, such that fluid may flow into or out of the second flow channel 120 from the second air vent 510; the casing 200 is provided with a third air port 211 and a fourth air port 212, the third air port 211 and the fourth air port 212 are arranged at intervals along the circumferential direction of the casing 200, when the driving piece 600 drives the rotating shaft 100 to rotate, the positions of the first flow channel 110 and the second flow channel 120 can be switched, so that the first flow channel 110 is switched to be in fluid communication with the third air port 211 or the fourth air port 212, and the second flow channel 120 is correspondingly communicated with the fourth air port 212 or the third air port 211; that is, when the first flow channel 110 is in fluid communication with the third air port 211, the second flow channel 120 is in fluid communication with the fourth air port 212, and when the first flow channel 110 is in fluid communication with the fourth air port 212, the second flow channel 120 is in fluid communication with the third air port 211. Further, the first air vent 310 and the second air vent 510 are both air inlets, and the third air vent 211 and the fourth air vent 212 are both air outlets; alternatively, the first air vent 310 and the second air vent 510 are both air outlets, and the third air vent 211 and the fourth air vent 212 are both air inlets. The change of the flowing direction of the fluid is realized through the rotary motion of the rotary shaft 100, so that the friction damage to the rubber ring in the reciprocating process is avoided, and the service life of the high-speed pneumatic pulse valve is prolonged.

The structure and shape of the high-speed pneumatic pulse valve are described in detail below:

in an alternative scheme of the embodiment of the utility model, a first ventilation groove 213 and a second ventilation groove 214 are formed in the inner wall of the housing 200; the first ventilation groove 213 and the second ventilation groove 214 are disposed opposite to each other and communicate with the third ventilation opening 211 and the fourth ventilation opening 212, respectively.

Specifically, referring to fig. 3, the inner wall of the housing 200 is recessed inward to form a first ventilation groove 213 and a second ventilation groove 214; the bottom wall of the first ventilation groove 213 is provided with a third ventilation opening 211, and the bottom wall of the second ventilation groove 214 is provided with a fourth ventilation opening 212.

The housing 200 has the first and second ventilation grooves 213 and 214 provided on the inner wall thereof to increase the communication area with the first or second flow path 110 or 120.

In an alternative embodiment of the present utility model, the first flow channel 110 includes a first section extending along the axial direction of the rotation shaft 100 and a second section communicating with the first section and disposed at an angle to the first section.

Specifically, in this embodiment, the first section extends along the axial direction of the rotation shaft 100, and one end of the first section is located at the center of the end of the rotation shaft 100 away from the driving member 600, and the first air vent 310 is located at the center of the front end cover 300, so that the structure of the first flow channel 110 is simplified, the length of the first flow channel 110 is shortened, and the efficiency of the high-speed pneumatic pulse valve is improved; more preferably, the second section is perpendicular to the first section.

The first section and the second section are perpendicular to each other, so as to realize the redirection of the first flow channel 110, and further realize that two ends of the first flow channel 110 can be respectively in fluid communication with the first air vent 310 of the front end cover 300 and the third air vent 211 or the fourth air vent 212 of the housing 200.

In an alternative embodiment of the present utility model, the second flow channel 120 includes a third section, a fourth section, and a fifth section, where the third section extends along the axial direction of the rotation shaft 100, and the fourth section and the fifth section are respectively communicated with two ends of the third section, and are all disposed at an included angle with the third section.

Specifically, in this embodiment, the fourth segment and the fifth segment are perpendicular to the third segment.

The fourth section and the fifth section are perpendicular to the third section, so as to realize redirection of the second flow channel 120, and further realize that two ends of the second flow channel 120 can be respectively in fluid communication with the second air vent 510 of the first sealing plate 500 and the third air vent 211 or the fourth air vent 212 of the housing 200.

In an alternative of the embodiment of the present utility model, a sealing member 520 is interposed between the first sealing plate 500 and the rotating shaft 100.

Specifically, in the present embodiment, the seal 520 is provided as a rotary seal ring.

A rotary seal ring is interposed between the first sealing plate 500 and the rotary shaft 100, satisfying the dynamic seal requirement of the housing 200.

In an alternative of the embodiment of the present utility model, the high-speed pneumatic pulse valve further includes a second sealing plate 710 and a third sealing plate 720; the second sealing plate 710 and the third sealing plate 720 are respectively positioned at two ends of the shell 200, and are respectively sleeved with the rotating shaft 100; a sealing member 520 is interposed between the second sealing plate 710 and the rotating shaft 100, and a sealing member 520 is interposed between the third sealing plate 720 and the rotating shaft 100.

Specifically, in this embodiment, the driving member 600 is configured as a motor, and the rotational speed and the rotational direction changing speed provided by the motor are controllable, so that the switching frequency of the high-speed pneumatic pulse valve is controllable. Further, the rotary shaft 100 is connected to the motor through a coupling 610. Preferably, the seal 520 interposed between the second sealing plate 710 and the rotating shaft 100 and the seal 520 interposed between the third sealing plate 720 and the rotating shaft 100 are both provided as rotary seal rings.

The sealing element 520 is clamped between the second sealing plate 710 and the rotating shaft 100, and the sealing element 520 is clamped between the third sealing plate 720 and the rotating shaft 100, so that the sealing effect is further improved, and the requirement on dynamic sealing of the shell 200 is met.

In an alternative embodiment of the present utility model, the inner walls of the first sealing plate 500, the second sealing plate 710 and the third sealing plate 720 are provided with mounting grooves, and the sealing member 520 is mounted in the mounting grooves.

Specifically, referring to fig. 1, inner walls of the first, second and third sealing plates 500, 710 and 720 are recessed inward to form mounting grooves.

The rotary sealing ring is arranged in the mounting groove, so that the contact area between the rotary sealing ring and the mounting groove is increased, and the sealing effect is improved.

In an alternative embodiment of the present utility model, the high-speed pneumatic pulse valve further includes a centering plate 800, where the centering plate 800 is mounted on a side of the rear end cover 400 facing away from the first sealing plate 500.

Specifically, the high-speed pneumatic pulse valve further comprises a mounting plate 900, and the mounting plate 900 is mounted on the side of the centering plate 800 facing away from the rear end cover 400, for mounting the motor. Further, the motor is detachably connected to the mounting plate 900 by bolts.

The centering plate 800 makes the axis of the driving shaft of the motor and the axis of the rotary shaft 100 collinear, and stabilizes the rotation of the rotary shaft 100.

Example two

In an alternative of the embodiment of the present utility model, the high-speed pneumatic pulse valve further includes a driving structure, where the driving structure is in transmission connection with the rotating shaft 100 to drive the rotating shaft 100 to move along the axial direction; the third air ports 211, the fourth air ports 212, the first air grooves 213 and the second air grooves 214 are all provided in plurality, the plurality of third air ports 211 are arranged at intervals along the axial direction of the rotating shaft 100, and the plurality of fourth air ports 212, the plurality of first air grooves 213 and the plurality of second air grooves 214 are arranged in one-to-one correspondence with the plurality of third air ports 211; the plurality of first ventilation grooves 213 are different in cross-sectional area, and the plurality of second ventilation grooves 214 are different in cross-sectional area.

Specifically, in this embodiment, referring to fig. 4, two third air vents 211, two fourth air vents 212, two first air vents 213 and two second air vents 214 are provided, and the driving structure drives the rotation shaft 100 to move along the axial direction, so as to realize that the first flow channel 110 and the second flow channel 120 of the rotation shaft 100 are communicated with the different third air vents 211 and the fourth air vents 212.

Because the cross-sectional areas of the plurality of first ventilation grooves 213 are different, and the cross-sectional areas of the plurality of second ventilation grooves 214 are different, by changing the position of the rotating shaft 100, the duty ratio of the high-speed pneumatic pulse valve in the rotating process can be changed to cope with different working conditions.

In an alternative of the embodiment of the present utility model, the driving structure includes a high pressure air inlet 711 and an elastic member 130; the high pressure air inlet 711 communicates with the passage 210, and the outlet is located at one side of the rotation shaft 100, and the elastic member 130 is installed at the other side of the rotation shaft 100; when high-pressure gas is introduced into the passage 210 through the high-pressure gas inlet 711, the elastic member 130 is elastically deformed.

Specifically, referring to fig. 4, the elastic member 130 is provided as a spring, and has one end abutting against the rotation shaft 100 and the other end abutting against the coupling 610. Referring to fig. 9, a high pressure air inlet 711 is provided to the second sealing plate 710. Referring to fig. 5 and 6, the spring is in a natural state in a default state, and at this time, the first flow passage 110 and the second flow passage 120 of the rotation shaft 100 are respectively communicated with the first ventilation groove 213 and the second ventilation groove 214 on the left side of the housing 200; referring to fig. 7 and 8, when high pressure gas is inputted to the high pressure gas inlet 711, the rotation shaft 100 is driven to move rightward by the high pressure gas, and the compression spring is deformed; at this time, the first and second flow passages 110 and 120 of the rotation shaft 100 communicate with the first and second ventilation grooves 213 and 214, respectively, on the right side of the housing 200. When the high pressure gas is removed, the spring returns to its original shape to drive the rotary shaft 100 to return.

Axial driving of the rotary shaft 100 is achieved through cooperation of high-pressure gas and a spring, and then adjustment of the duty ratio of the high-speed pneumatic pulse valve is achieved.

In an alternative of the embodiment of the present utility model, a bearing 220 is interposed between the rotation shaft 100 and the housing 200.

Specifically, the bearings 220 are provided in two, and are located on both sides of the plurality of third air vents 211, respectively.

The provision of the bearing 220 reduces friction between the rotation shaft 100 and the inner wall of the passage 210, and makes the rotation of the rotation shaft 100 smoother.

In an alternative embodiment of the present utility model, the rotation shaft 100 is connected to the bearing 220 through the spline shaft sleeve 140.

Specifically, referring to fig. 10, the inner ring of the bearing 220 is tightly fitted to the outer ring of the spline sleeve 140, the inner ring of the spline sleeve 140 has a spline structure, and is in spline fit with the rotating shaft 100, when the rotating shaft 100 moves axially, the rotating shaft 100 moves on the spline sleeve, and the spline sleeve 140 is axially fixed.

The spline housing 140 enables the rotation shaft 100 to be axially movable relative to the bearing 220.

Example III

The medical apparatus provided by the embodiment of the utility model comprises the high-speed pneumatic pulse valve in the first embodiment and the second embodiment, so that the medical apparatus also has all the beneficial effects in the first embodiment and the second embodiment, and the details are not repeated here.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (9)

1. A high-speed pneumatic pulse valve, comprising: a rotating shaft (100), a housing (200), a front end cover (300), a rear end cover (400), a first sealing plate (500), and a driving member (600);

the shell (200) is provided with a channel (210), the front end cover (300) and the rear end cover (400) are respectively arranged at two ends of the channel (210), and the first sealing plate (500) is positioned between the shell (200) and the rear end cover (400);

one end of the rotating shaft (100) extends into the channel (210), and the other end of the rotating shaft penetrates through the first sealing plate (500) and the rear end cover (400) to be in transmission connection with the driving piece (600);

the rotary shaft (100) is provided with a first flow channel (110) and a second flow channel (120), the front end cover (300) is provided with a first air vent (310), the side wall of the first sealing plate (500) is provided with a second air vent (510), the side wall of the channel (210) is provided with a third air vent (211) and a fourth air vent (212), and the third air vent (211) and the fourth air vent (212) are arranged at intervals along the circumferential direction of the shell (200);

one end of the first flow channel (110) is in fluid communication with the first vent (310), one end of the second flow channel (120) is in fluid communication with the second vent (510), the driving member (600) drives the rotating shaft (100) to rotate so as to switch the first flow channel (110) to be in fluid communication with the third vent (211) or the fourth vent (212), and the second flow channel (120) is in fluid communication with the fourth vent (212) or the third vent (211), respectively.

2. The high-speed pneumatic pulse valve according to claim 1, characterized in that the inner wall of the housing (200) is provided with a first venting groove (213) and a second venting groove (214);

the first ventilation groove (213) and the second ventilation groove (214) are arranged opposite to each other and are respectively communicated with the third ventilation opening (211) and the fourth ventilation opening (212).

3. The high-speed pneumatic pulse valve of claim 2, further comprising a drive structure drivingly connected to the rotary shaft (100) to drive the rotary shaft (100) to move axially;

the third air vent (211), the fourth air vent (212), the first air vent groove (213) and the second air vent groove (214) are all arranged in a plurality, the third air vents (211) are arranged at intervals along the axial direction of the rotating shaft (100), and the fourth air vent (212), the first air vent groove (213) and the second air vent groove (214) are respectively arranged in one-to-one correspondence with the third air vents (211);

the cross-sectional areas of the plurality of first ventilation grooves (213) are different, and the cross-sectional areas of the plurality of second ventilation grooves (214) are different.

4. A high-speed pneumatic pulse valve as claimed in any one of claims 1-3, wherein the first flow passage (110) comprises a first section extending in the axial direction of the rotation axis (100) and a second section communicating with the first section and arranged at an angle to the first section.

5. A high-speed pneumatic pulse valve as claimed in any one of claims 1-3, wherein the second flow passage (120) comprises a third section, a fourth section and a fifth section, the third section extending in the axial direction of the rotary shaft (100), the fourth section and the fifth section being in communication with both ends of the third section, respectively, and each being disposed at an angle to the third section.

6. A high-speed pneumatic pulse valve according to any of claims 1-3, characterized in that a seal (520) is sandwiched between the first sealing plate (500) and the rotating shaft (100).

7. The high-speed pneumatic pulse valve of claim 6, further comprising a second sealing plate (710) and a third sealing plate (720);

the second sealing plate (710) and the third sealing plate (720) are respectively positioned at two ends of the shell (200), and are sleeved with the rotating shaft (100);

a sealing element (520) is clamped between the second sealing plate (710) and the rotating shaft (100), and a sealing element (520) is clamped between the third sealing plate (720) and the rotating shaft (100).

8. The high-speed pneumatic pulse valve of claim 7, wherein the inner walls of the first sealing plate (500), the second sealing plate (710) and the third sealing plate (720) are each provided with a mounting groove, and the seal (520) is mounted in the mounting groove.

9. A medical device comprising a high-speed pneumatic pulse valve as defined in any one of claims 1-8.