CN115970121A - Safety valve, suction valve and ventilator - Google Patents

Abstract

The embodiment of the invention discloses a safety valve, an inhalation valve and a breathing machine, wherein the safety valve comprises a mounting seat, a sealing assembly and a driving assembly. The mounting seat is provided with an air duct which penetrates through the mounting seat; the elastically connected closing component is provided with a first position capable of closing the air channel and a second position capable of opening the air channel on the mounting seat, and in a free state, the elastic force forces the closing component to be positioned at the first position or the second position; the drive assembly is capable of driving the closure assembly to move against the spring force to shift the closure assembly between the first and second positions. Through setting up the seal assembly, seal assembly elastic connection is on the mount pad, and under the free state, the seal assembly can be located the first position that opens the air duct with air duct confined or be located the second position that opens the air duct under the effect of elastic force, and through the cooperation of the seal assembly of drive assembly and elasticity setting, can realize opening and close of air duct, simple structure, reduce cost assembles also more conveniently.

Description

Safety valve, suction valve and ventilator

technical field

The invention relates to the technical field of ventilators, in particular to a safety valve, an inhalation valve and a ventilator.

Background technique

Ventilators are generally equipped with a safety valve, which is located on the path of delivering gas to the patient, and is used to relieve the gas pressure when the pressure of the delivered gas exceeds the required pressure, so as to deliver gas to the patient smoothly.

Most of the safety valves of ventilators in the related art adopt larger electromagnet type or mechanical safety valves with complicated structure. Due to the complicated structure, not only the assembly is troublesome, but also the technical cost will be increased.

Contents of the invention

Based on this, it is necessary to address the above-mentioned problems and propose a safety valve, an inhalation valve and a ventilator with a simple structure and low cost.

On the one hand, an embodiment of the present invention provides a safety valve, and the safety valve includes:

The mounting seat has an air passage arranged through it;

A closure assembly elastically connected to the installation seat, the closure assembly has a first position on the installation seat capable of closing the air passage and a second position capable of opening the air passage, in a free state , the elastic force forces the closure assembly to be in the first position or the second position;

The driving assembly can drive the closing assembly to move against the elastic force, so that the closing assembly can be transformed between the first position and the second position.

In some embodiments of the safety valve, the closure assembly includes a valve core movably arranged in the mounting seat and a diaphragm sleeved on the valve core, and one end of the valve core is elastically connected to the mounting seat. In the seat, the elastic force can drive the membrane to close one end of the air passage in a free state.

In some embodiments of the safety valve, a guide shaft is fixedly connected to the installation seat, the valve core is sleeved on the guide shaft, and an elastic member is sleeved on the guide shaft, and the elastic member is One end is connected to one end of the valve core for providing elastic force to the valve core.

In some embodiments of the safety valve, the air passage has two openings, the closure assembly is arranged between the two openings, and the mounting seat is detachably connected to one opening of the air passage with a resisting Connecting piece, the abutting piece runs through a through hole communicating with the air passage, the outer wall of the abutting piece is closely attached to the inner wall of the air passage, so that the air flow can only flow out through the through hole, so The closing component can be abutted against the through hole to close the through hole.

In some embodiments of the safety valve, the inner wall of the air passage is provided with a plurality of connection grooves, and a connection block is provided on the abutting member corresponding to the connection grooves;

Or the abutting member is provided with a plurality of connecting grooves, and the inner wall of the air passage is provided with connecting blocks corresponding to the positions of the connecting grooves;

The connection block can be plugged into the connection groove, and the connection block can be clamped in the connection groove by twisting the abutting member.

In some embodiments of the safety valve, the connection groove includes a movable end and a clamping end, the movable end extends from the opening of the air passage along the opening direction of the air passage, and one end of the clamping end is connected to the opening of the air passage. The movable end communicates with an end away from the opening, and is set at a preset angle with the movable end.

In some embodiments of the safety valve, the driving component is a solenoid valve, and one end of the solenoid valve has a movable shaft core, and the solenoid valve can drive the shaft core to move, so as to drive the closing component in the first position. transforming between a first position and said second position.

In some embodiments of the safety valve, the shaft core is further provided with a card slot, and the shaft core is also sleeved with a limiting member with a part of the structure snapped into the card slot, and the limiting member is located at Between the installation seat and the solenoid valve, the position of the shaft core is limited.

On the other hand, the embodiment of the present invention also provides an inhalation valve, which includes a valve body, and the valve body has a main air passage for air flow;

As well as the above-mentioned safety valve, the safety valve is installed on the valve body, and the air channel communicates with the main air channel.

In yet another aspect, an embodiment of the present invention also provides a ventilator, including the above-mentioned inhalation valve.

Adopting the embodiment of the present invention has the following beneficial effects:

According to the safety valve, inspiratory valve and ventilator of the above-mentioned embodiments, by setting the closing component, the closing component is elastically connected to the mounting seat, and in the free state, the closing component can be located at the first position to close the airway under the action of elastic force. position or in a second position that opens the airway. Regardless of whether the initial position of the closure assembly is at the first position or the second position, the drive assembly can be used to drive the closure assembly to another position, so that the airway is opened or closed. When the force exerted by the drive assembly on the closure assembly is removed, Under the action of elastic force, the closure component returns to its original position. Through the cooperation of the driving component and the elastically arranged closing component, the opening and closing of the air passage can be realized, the structure is simple, the cost is reduced, and the assembly is also relatively convenient.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

in:

Fig. 1 shows a cross-sectional view of an inhalation valve provided according to an embodiment of the present invention;

Fig. 2 shows a cross-sectional view of a mounting seat of a safety valve provided according to an embodiment of the present invention;

Fig. 3 shows a cross-sectional view of an abutment member of a safety valve according to an embodiment of the present invention;

Fig. 4 shows a cross-sectional view of a valve core of a safety valve provided according to an embodiment of the present invention;

Fig. 5 shows a cross-sectional view of a shaft core of a safety valve according to an embodiment of the present invention;

Fig. 6 shows a schematic structural diagram of an inhalation valve provided according to an embodiment of the present invention.

Description of main component symbols:

1. Mounting seat; 11. Air passage; 111. First opening; 112. Second opening; 12. Guide shaft; 13. Elastic member; 14. Spring limit post; 141. Mounting slot; 2. Closed assembly; 21 , valve core; 211, first part; 212, second part; 213, through groove; 22, diaphragm; 30, drive assembly; 31, shaft core; 311, card slot; 312, limiter; 40, butt 401, through hole; 402, boss; 403, abutment edge; 404, driving block; 405, groove; 406, sealing ring; 50, connecting groove; 501, movable end; 502, clamping end; 51 , connection block; 6, valve body; 61, main air passage; 62, pressure relief port; 63, mounting bracket.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention is capable of being implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. 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. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

On the one hand, the present invention provides a safety valve, which can be applied in the ventilation system. In one embodiment, please refer to FIG. 1 , the safety valve includes a mounting seat 1 , a closing assembly 2 and a driving assembly 30 . There is an air passage 11 through the installation seat 1, and the air flow can flow in the air passage 11. Since the air passage 11 is provided through, the air flow can flow into the air passage 11 from one end of the air passage 11, and flow out of the air passage 11 from the other end.

The closure assembly 2 is elastically connected to the mounting base 1 , and the closure assembly 2 has a first position capable of closing the air channel 11 and a second position capable of opening the air channel 11 on the mounting base 1 . The closure assembly 2 can be switched between the first position and the second position, so as to realize the opening and closing of the air channel 11 . In a free state, the elastic force can force the closure assembly 2 to be in the first position or the second position.

The driving assembly 30 can drive the closing assembly 2 to move against the elastic force, so that the closing assembly 2 can be transformed between the first position and the second position. If the closed assembly 2 is in the first position in a free state and the air passage 11 is in a normally closed state, the drive assembly 30 can drive the closed assembly 2 to move to the second position against the elastic force to open the air passage 11; if the closed assembly 2 is in a free state When the lower position is at the second position, the air channel 11 is in a normally open state, and the closing assembly 2 can be driven to move to the first position against the elastic force by the driving assembly 30 to close the air channel 11 . It should be noted that no matter which position the closure assembly 2 is in in a free state, when the drive assembly 30 is used to drive the closure assembly 2 to move to another position against the elastic force, when the driving force of the drive assembly 30 is removed, the effect of the elastic force will be used. It will drive the closure assembly 2 to return to its original position.

Through the cooperation of the driving assembly 30 and the elastically arranged closing assembly 2, the opening and closing of the air channel 11 can be realized, the structure is simple, and the cost is reduced.

In a specific embodiment, please refer to FIG. 1 , FIG. 2 and FIG. 4 , the closure assembly 2 includes a valve core 21 movably arranged in the mounting seat 1 and a diaphragm 22 sleeved on the valve core 21 , the valve core One end of 21 is elastically connected in the mounting seat 1, and the elastic force can drive the diaphragm 22 to close one end of the air channel 11 in a free state, that is, the diaphragm 22 is in the first position.

It should be noted that the valve core 21 can be in various shapes such as rectangle or cylinder. In the embodiment of the present invention, the valve core 21 has two parts, and the first part 211 and the second part 212 are integrally formed or welded. One end of the second part 212 is fixedly connected to the middle of one end of the first part 211. The second part 212 has a certain length and is cylindrical in shape as a whole. The radial dimension of the second portion 212 is smaller than the radial dimension of the first portion 211 , so that the first portion 211 and the second portion 212 are arranged in a “T” shape.

The diaphragm 22 can be made of materials such as plastic, stainless steel, aluminum alloy or silica gel, preferably made of flexible materials such as rubber or silica gel, and the diaphragm 22 is hollow, and the shape and size of the hollow structure are adapted to the first part 211, so that The diaphragm 22 can be sleeved outside the first part 211 . By setting the valve core 21 into a "T" shape, the diaphragm 22 is sleeved on the valve core 21 and is not easy to detach. The diaphragm 22 is made of rubber or silica gel. better.

In a specific embodiment, a guide shaft 12 is fixedly connected to the installation seat 1, and a through groove 213 adapted to the shape and size of the guide shaft 12 runs through the valve core 21 along its axis, and the guide shaft 12 can be inserted into the In the through groove 213 , the guide shaft 12 is in clearance fit with the through groove 213 . An elastic member 13 is sheathed on the guide shaft 12 , one end of the elastic member 13 is fixed, and the other end is fixedly connected to the end of the valve core 21 away from the diaphragm 22 . By setting the guide shaft 12 and inserting one end of the guide shaft 12 into the valve core 21 , the valve core 21 can move along the path of the guide shaft 12 , and by setting the elastic member 13 , the elastic connection of the valve core 21 can be realized.

In one embodiment, please refer to FIG. 1 to FIG. 4 , the air channel 11 has two openings, a first opening 111 and a second opening 112 , and the cross section of the air channel 11 can be in various shapes, such as rectangular or trapezoidal, etc. , is not limited here. In a preferred embodiment, the path of the air channel 11 is an "L" shape, and the first opening 111 and the second opening 112 are respectively located at two ends of the "L" shape. The closing assembly 2 is arranged between the two openings, and one of the openings can be closed by the movement of the diaphragm 22 .

Specifically, a spring limiting column 14 is provided on the inner wall facing the second opening 112 inside the mounting base 1, and the spring limiting column 14 can be fixed on the mounting base 1 by welding or screwing, or the spring limiting column 14 is preferably fixed to the mounting base 1. The post 14 is integrally formed with the mounting seat 1 . One end of the spring limit post 14 facing the second opening 112 is provided with a mounting groove 141, and the end of the guide shaft 12 away from the valve core 21 can be fixedly connected in the mounting groove 141. For example, the mounting groove 141 can be a threaded hole, and the guide shaft 12 is away from the valve core. One end of the core 21 is provided with an external thread, and can be screwed into the threaded hole, or the guide shaft 12 can be detachably installed in the installation groove 141 by buckling, clipping and other means.

The guide shaft 12 is located between the spring limit post 14 and the spool 21, the spool 21 can move toward or away from the second opening 112 along the guide shaft 12, the elastic member 13 is preferably a spring, one end of which can be sleeved on the spring limit. Outside the position post 14 , the other end can be sleeved on the end of the second part 212 of the valve core 21 away from the first part 211 .

It is worth mentioning that, in a preferred embodiment, in a free state, the spring forces the diaphragm 22 to be in the first position to close the second opening 112. At this time, the spring is in a normal state or a compressed state. In an example, the end of the second part 212 away from the first part 211 is provided as a step, and one end of the spring abuts against the step structure to push the diaphragm 22 to close the second opening 112 .

It should be noted that the mounting base 1 has a detachable abutment piece 40 at the second opening 112 of the airway 11, and a through hole 401 communicating with the airway 11 runs through the abutment piece 40 along the path of the airway 11. Moreover, the outer wall of the abutting member 40 is in close contact with the inner wall of the second opening 112 of the air channel 11 , so that the air flow inside the air channel 11 can only flow out through the through hole 401 when flowing to the second opening 112 .

It should be noted that one end of the through hole 401 is set facing the diaphragm 22, and the radial dimension of the through hole 401 is smaller than the radial dimension of the diaphragm 22. In the free state, the diaphragm 22 abuts against the diaphragm 22 under the action of the spring force. At the through hole 401 of the abutment member 40 , one end of the through hole 401 is blocked, so as to completely close the second opening 112 of the air channel 11 . In addition, one end of the abutting member 40 facing the diaphragm 22 protrudes from a conical boss 402, and the end of the boss 402 away from the abutting member 40 is provided with an abutting edge 403, on which the diaphragm 22 can be abutted. 403 on. By providing the abutting edge 403 , the diaphragm 22 can abut on the abutting edge 403 so as to block the through hole 401 .

In a specific embodiment, the inner wall of the air passage 11 is provided with a plurality of connection grooves 50, and the position corresponding to the connection grooves 50 on the abutment member 40 is protruded with a connection block 51; or the abutment member 40 is provided with a plurality of connection In the slot 50 , a connecting block 51 protrudes from the inner wall of the air channel 11 corresponding to the position of the connecting slot 50 . When the abutment 40 is inserted into the air channel 11, the connection block 51 can be inserted into the connection groove 50, and the connection block 51 can be snapped into the connection groove 50 by twisting the abutment 40, and by twisting in the opposite direction The abutting piece 40 can release the locking state of the connection block 51 , so as to realize the detachable connection between the abutting piece 40 and the mounting base 1 .

Specifically, the connection groove 50 includes a movable end 501 and a clamping end 502. The movable end 501 extends from the second opening 112 of the air passage 11 along the opening direction of the air passage 11. One end of the clamping end 502 is far away from the movable end 501. One end of the two openings 112 is connected, and the clamping end 502 and the movable end 501 are arranged at a preset angle, and the preset angle is preferably a right angle.

The connecting block 51 can be inserted into the movable end 501 and the clamping end 502, and the abutment 40 can be inserted into the air channel 11 from the second opening 112. During the insertion process, the outer wall of the abutment 40 and the air channel The inner wall of 11 is closely fitted, and the connecting block 51 is aligned with the movable end 501, and the connecting block 51 is plugged into the movable end 501. The abutment piece 40 moves the connection block 51 to the opening path of the snap-in end 502, and then twists the abutment piece 40 to drive the connection block 51 to move into the snap-in end 502, and the connection block 51 and the snap-in end 502 cooperate The abutting piece 40 can be prevented from moving along the air passage 11 , so as to achieve stable installation of the abutting piece 40 in the air passage 11 .

It should be noted that at least one driving block 404 is provided at the end of the abutting piece 40 facing away from the boss 402, by pinching the driving block 404, the abutting piece 40 can be picked up, and the abutting piece 40 can be placed in the air channel 11 , and when the contact member 40 moves to the corresponding position, the action of twisting the contact member 40 can be realized by driving the driving block 404 .

In order to increase the tightness between the abutting piece 40 and the mounting base 1, a groove 405 is formed on the outer wall of the abutting piece 40 around its axis, and a sealing ring 406 is sleeved in the groove 405, and the sealing ring 406 is made of rubber Ring or silicone ring, etc., the sealing ring 406 protrudes from the outer wall of the abutment 40, and when the abutment 40 is inserted into the air channel 11, the sealing ring 406 abuts on the inner wall of the air channel 11 to increase the airtightness .

In one embodiment, the driving assembly 30 is a solenoid valve. The solenoid valve has a movably arranged shaft core 31. The solenoid valve can drive the shaft core 31 to move. The solenoid valve is a prior art. Its internal structure and how to drive the shaft core 31 movements are all prior art, and will not be described too much here.

In a preferred embodiment, in a free state, the diaphragm 22 abuts against the abutting edge 403 to close the through hole 401. When the through hole 401 needs to be opened, the solenoid valve is activated to drive the shaft core 31 through the through hole. The hole 401 moves toward the diaphragm 22, and continues to control the movement of the shaft core 31 after contacting the diaphragm 22, so as to force the diaphragm 22 to overcome the elastic force and move away from the abutting edge 403 toward the spring limit post 14, thereby realizing the opening of the through hole 401 . When it is necessary to close the through hole 401 again, it is only necessary to close the solenoid valve. At this time, the shaft core 31 is in an active state. 403, re-close the through hole 401.

In a specific embodiment, please refer to FIG. 5 , the shaft core 31 is also provided with a locking groove 311, the locking slot 311 is located at one end of the shaft core 31 close to the solenoid valve, and the shaft core 31 is also sleeved with a limiting member 312, Part of the structure of the limiting member 312 can be engaged in the engaging slot 311 . The stopper 312 is located outside the solenoid valve, between the installation seat 1 and the solenoid valve. When the diaphragm 22 is driven by the spring to move toward the abutment edge 403, the stopper 312 also moves toward the valve body 6 of the solenoid valve. When the diaphragm When the sheet 22 just abuts against the abutting edge 403 , the limiting member 312 just abuts against the valve body 6 of the solenoid valve, or is about to abut against the valve body 6 . By setting the stopper 312, the stop position of the shaft core 31 can be limited, so that the end of the shaft core 31 can be attached to the diaphragm 22 or be closer to the diaphragm 22, so that the diaphragm 22 can be quickly driven to disengage next time. Along 403, further increasing the response speed.

On the other hand, please refer to Fig. 1 and Fig. 6, the embodiment of the present invention also provides an inhalation valve, the inhalation valve includes a valve body 6 and the above-mentioned safety valve, and the valve body 6 has a main air passage 61 for air flow inside , the first opening 111 of the safety valve is installed on the valve body 6 , and the first opening 111 of the air channel 11 communicates with the main air channel 61 . The airflow in the main air passage 61 can enter the air passage 11 through the first opening 111 .

Specifically, one end of the valve body 6 is provided with a pressure relief port 62. The pressure relief port 62 can be plugged and fitted to the end of the first opening 111 of the air passage 11, and can be inserted, buckled, clipped or screwed. The connection mode can be detachable, or the suction valve and safety valve can also be integrated into one set. The valve body 6 is also provided with a mounting frame 63 on which the mounting seat 1 and the solenoid valve are mounted.

In yet another aspect, an embodiment of the present invention also provides a ventilator, which includes the above-mentioned inhalation valve.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the scope of the patent application. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. A safety valve, characterized in that, comprising: The mounting seat has an air passage arranged through it; A closure assembly elastically connected to the installation seat, the closure assembly has a first position on the installation seat capable of closing the air passage and a second position capable of opening the air passage, in a free state , the elastic force forces the closure assembly to be in the first position or the second position; The driving assembly can drive the closing assembly to move against the elastic force, so that the closing assembly can be transformed between the first position and the second position. 2. The safety valve according to claim 1, characterized in that, the closure assembly includes a valve core movably arranged in the mounting seat and a diaphragm sleeved on the valve core, the valve core One end is elastically connected in the installation seat, and the elastic force can drive the diaphragm to close one end of the air passage in a free state. 3. The safety valve according to claim 2, wherein a guide shaft is fixedly connected to the mounting seat, the valve core is sleeved on the guide shaft, and an elastic valve is also sleeved on the guide shaft. One end of the elastic member is connected to one end of the valve core for providing elastic force to the valve core. 4. The safety valve according to any one of claims 1-3, characterized in that, the air passage has two openings, the closing assembly is arranged between the two openings, and the mounting seat is located between the two openings. An opening of the air passage is detachably connected with a butting piece, the abutting piece penetrates through a through hole communicating with the air passage, the outer wall of the abutting piece closely fits the inner wall of the air passage, The airflow can only flow out through the through hole, and the closing component can be abutted against the through hole to close the through hole. 5. The safety valve according to claim 4, wherein the inner wall of the air passage is provided with a plurality of connecting grooves, and a connecting block is arranged on the position corresponding to the connecting grooves on the abutting member; Or the abutting member is provided with a plurality of connecting grooves, and the inner wall of the air passage is provided with connecting blocks corresponding to the positions of the connecting grooves; The connection block can be plugged into the connection groove, and the connection block can be clamped in the connection groove by twisting the abutting member. 6. The safety valve according to claim 5, wherein the connection groove includes a movable end and a clamping end, and the movable end extends from the opening of the air passage along the opening direction of the air passage, One end of the clamping end communicates with an end of the movable end away from the opening, and is set at a preset angle with the movable end. 7. The safety valve according to claim 1, wherein the driving assembly is a solenoid valve, one end of the solenoid valve has a movable shaft core, and the solenoid valve can drive the shaft core to move to drive the The closure assembly transitions between the first position and the second position. 8. The safety valve according to claim 7, characterized in that, the shaft core is also provided with a card slot, and the shaft core is also sleeved with a limit piece that is partly snapped into the card slot , the limiting member is located between the installation seat and the electromagnetic valve, and is used to limit the position of the shaft core. 9. An inhalation valve, characterized in that it comprises a valve body, and the valve body has a main air passage for air flow; And the safety valve according to any one of claims 1-8, the safety valve is installed on the valve body, and the air channel communicates with the main air channel. 10. A ventilator, characterized in that it comprises the inspiratory valve as claimed in claim 9.

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