Safety valve, inhalation valve and breathing machine

Abstract

The embodiment of the present application discloses a safety valve, an inhalation valve and a breathing machine, wherein the safety valve comprises a mounting seat, a closing assembly and a driving assembly. The mounting seat is provided with a ventilation channel; the elastically connected closing assembly has a first position capable of closing the ventilation channel and a second position capable of opening the ventilation channel on the mounting seat; in a free state, the elastic force forces the closing assembly to be located at 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 is transformed between the first position and the second position. By setting the closing assembly, the closing assembly is elastically connected to the mounting seat; in a free state, the closing assembly can be located at the first position capable of closing the ventilation channel or at the second position capable of opening the ventilation channel under the action of the elastic force; by cooperation of the driving assembly and the elastically arranged closing assembly, the opening and closing of the ventilation channel can be realized, the structure is simple, the cost is reduced, and assembly is relatively convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of breathing machines, in particular to a safety valve, an inhalation valve and a breathing machine. BACKGROUND

[0002] Generally, a safety valve is arranged in a breathing machine, and the safety valve is located on a path for delivering gas to a patient, and is used to release the gas pressure when the gas pressure exceeds the required pressure, so as to smoothly deliver the gas to the patient.

[0003] In the related art, the safety valve of the breathing machine mostly adopts an electromagnetic type or a mechanical type safety valve with a complex structure, and due to the complex structure, it is not only troublesome to assemble, but also increases the technical cost. SUMMARY

[0004] Therefore, it is necessary to provide a safety valve, an inhalation valve and a breathing machine with a simple structure and reduced cost in view of the above problems.

[0005] In one aspect, the present application provides a safety valve, which comprises:

[0006] A mounting seat with an air passage arranged therethrough;

[0007] A closing assembly elastically connected to the mounting seat, the closing assembly has a first position capable of closing the air passage and a second position capable of opening the air passage on the mounting seat, and in a free state, the elastic force forces the closing assembly to be located at the first position or the second position;

[0008] A driving assembly capable of driving the closing assembly to move against the elastic force, so as to change the closing assembly between the first position and the second position.

[0009] In some embodiments of the safety valve, the closing assembly comprises a valve core movably arranged in the mounting seat and a diaphragm sleeved on the valve core, one end of the valve core is elastically connected in the mounting seat, and in a free state, the elastic force can drive the diaphragm to close one end of the air passage.

[0010] In some embodiments of the safety valve, a guide shaft is fixedly connected in the mounting seat, the valve core is sleeved on the guide shaft, and an elastic member is further sleeved on the guide shaft, one end of the elastic member is connected to one end of the valve core, and the elastic member is used to provide the elastic force to the valve core.

[0011] In some embodiments of the safety valve, the vent passage has two openings, the closing assembly is arranged between the two openings, the mounting base is detachably connected with an abutting piece at one opening of the vent passage, the abutting piece is penetrated by a through hole in communication with the vent passage, the outer wall of the abutting piece is tightly fitted with the inner wall of the vent passage, so that the airflow can only flow out through the through hole, and the closing assembly can abut on the through hole to close the through hole.

[0012] In some embodiments of the safety valve, the inner wall of the vent passage is provided with a plurality of connecting grooves, and the abutting piece is provided with connecting blocks at positions corresponding to the connecting grooves.

[0013] Or the abutting piece is provided with a plurality of connecting grooves, and the inner wall of the vent passage is provided with connecting blocks at positions corresponding to the connecting grooves.

[0014] The connecting blocks can be inserted into the connecting grooves, and the connecting blocks can be clamped in the connecting grooves by twisting the abutting piece.

[0015] In some embodiments of the safety valve, the connecting grooves include a movable end and a clamping end, the movable end extends from the opening of the vent passage along the opening direction of the vent passage, and one end of the clamping end is in communication with one end of the movable end away from the opening and is arranged at a preset angle with the movable end.

[0016] In some embodiments of the safety valve, 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 closing assembly to change between the first position and the second position.

[0017] In some embodiments of the safety valve, the shaft core is further provided with a clamping groove, and the shaft core is further sleeved with a limiting piece of which part of the structure is clamped in the clamping groove, and the limiting piece is located between the mounting base and the solenoid valve to limit the position of the shaft core.

[0018] On the other hand, the embodiments of the present application also provide an inhalation valve, which comprises a valve body having a main gas passage for gas flow;

[0019] and the safety valve described above, the safety valve is installed on the valve body, and the vent passage is in communication with the main gas passage.

[0020] In another aspect, the embodiments of the present application also provide a breathing machine comprising the inhalation valve described above.

[0021] The embodiments of the present application have the following beneficial effects:

[0022] According to the safety valve, inspiratory valve, and ventilator of the above embodiments, a sealing component is provided. This sealing component is elastically connected to the mounting base. In its free state, under the action of elastic force, the sealing component can be positioned in a first position that closes the airway or in a second position that opens the airway. Regardless of whether the initial position of the sealing component is in the first or second position, a driving component can drive the sealing component to another position, thereby opening or closing the airway. When the force applied to the sealing component by the driving component is removed, the sealing component returns to its original position under the action of elastic force. The opening and closing of the airway can be achieved through the cooperation of the driving component and the elastically positioned sealing component. The structure is simple, the cost is reduced, and assembly is relatively convenient. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] in:

[0025] Figure 1 A cross-sectional view of an intake valve provided according to an embodiment of the present invention is shown;

[0026] Figure 2 A cross-sectional view of a mounting base for a safety valve according to an embodiment of the present invention is shown;

[0027] Figure 3 A cross-sectional view of the abutment member of a safety valve according to an embodiment of the present invention is shown;

[0028] Figure 4 A cross-sectional view of the valve core of a safety valve according to an embodiment of the present invention is shown;

[0029] Figure 5 A cross-sectional view of the shaft of a safety valve according to an embodiment of the present invention is shown;

[0030] Figure 6 A schematic diagram of the structure of an intake valve provided according to an embodiment of the present invention is shown.

[0031] Explanation of key component symbols:

[0032] 1, mounting seat; 11, air passage; 111, first opening; 112, second opening; 12, guide shaft; 13, elastic member; 14, spring limiting column; 141, mounting groove; 2, closing assembly; 21, valve core; 211, first part; 212, second part; 213, through groove; 22, diaphragm; 30, driving assembly; 31, shaft core; 311, clamping groove; 312, limiting member; 40, abutting member; 401, through hole; 402, boss; 403, abutting edge; 404, driving block; 405, groove; 406, sealing ring; 50, connecting groove; 501, movable end; 502, clamping end; 51, connecting block; 6, valve body; 61, main air passage; 62, pressure relief port; 63, mounting frame. DETAILED DESCRIPTION

[0033] For the purpose of promoting an understanding of the principles of the application, reference will now be made to the embodiments illustrated in the drawings. There is shown in the drawings, several embodiments of the application. It is to be understood that the application is not limited to the embodiments described and shown, but is capable of numerous rearrangements, modifications, and substitutions of parts and elements. Rather, the several embodiments of the application are chosen and described so that others skilled in the art can understand the application.

[0034] It is to be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It is to be understood that the term "comprising" is not limiting, but rather, is intended to mean that certain embodiments include additional steps, elements, etc. It is to be understood that where the application is described or claimed in enabled dependent form, it is contemplated that any of the features of a claim can be provided in any combination.

[0035] Unless otherwise defined, 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 in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this description, the terms "may" and "can" include any suitable combination of the following: possible, possible that, can, can that, and the like.

[0036] In one aspect, the present application provides a safety valve, which can be applied to an air passage system. In one embodiment, please refer to Figure 1 The safety valve includes a mounting seat 1, a closing assembly 2, and a driving assembly 30. The mounting seat 1 has an air passage 11 passing through the mounting seat 1. Air flow can flow in the air passage 11. Since the air passage 11 passes through the mounting seat 1, 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.

[0037] The closing assembly 2 is elastically connected to the mounting base 1, and the closing assembly 2 has a first position capable of closing the air passage 11 and a second position capable of opening the air passage 11 on the mounting base 1. The closing assembly 2 is capable of being converted between the first position and the second position to realize the opening and closing of the air passage 11. In a free state, the elastic force can force the closing assembly 2 to be located in the first position or the second position.

[0038] The driving assembly 30 is capable of driving the closing assembly 2 to move against the elastic force to convert the closing assembly 2 between the first position and the second position. If the closing assembly 2 is located in the first position in a free state, the air passage 11 is in a normally closed state, and the driving assembly 30 is capable of driving the closing assembly 2 to move against the elastic force to the second position to open the air passage 11; if the closing assembly 2 is located in the second position in a free state, the air passage 11 is in a normally open state, and the driving assembly 30 is capable of driving the closing assembly 2 to move against the elastic force to the first position to close the air passage 11. It should be noted that no matter which position the closing assembly 2 is located in a free state, when the driving assembly 30 is used to drive the closing assembly 2 to move against the elastic force to the other position, the elastic force will drive the closing assembly 2 to return to the original position when the driving force of the driving assembly 30 is removed.

[0039] Through the cooperation of the driving assembly 30 and the elastically arranged closing assembly 2, the opening and closing of the air passage 11 can be realized, and the structure is simple and the cost is reduced.

[0040] In a specific embodiment, please refer to Figure 1 、 Figure 2 and Figure 4 The closing assembly 2 includes a valve core 21 movably arranged in the mounting base 1 and a diaphragm 22 sleeved on the valve core 21, one end of the valve core 21 is elastically connected in the mounting base 1, and in a free state, the elastic force can drive the diaphragm 22 to close one end of the air passage 11, that is, the diaphragm 22 is located in the first position.

[0041] It should be noted that the valve core 21 can be rectangular or cylindrical and various shapes, and in the embodiment of the present application, the valve core 21 has two parts, a first part 211 and a second part 212 which are integrally formed or welded. One end of the second part 212 is fixedly connected to the middle position of one end of the first part 211, the second part 212 has a certain length and is in a whole cylindrical shape, the first part 211 is in a disc shape, the first part 211 and the second part 212 are coaxially arranged and the radial dimension of the second part 212 is smaller than that of the first part 211, so that the first part 211 and the second part 212 are arranged in a "T" shape.

[0042] The diaphragm 22 can be made of 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 on the first part 211. By setting the valve core 21 as "T" type, the diaphragm 22 is not easy to separate from the valve core 21, and the diaphragm 22 is made of rubber or silica gel, which has better sealing performance when blocking the air passage 11.

[0043] In a specific embodiment, the mounting seat 1 is further fixedly connected with a guide shaft 12, the valve core 21 penetrates a through groove 213 with a shape and size matched with the guide shaft 12 along its axis, the guide shaft 12 can be inserted into the through groove 213, and the guide shaft 12 and the through groove 213 are in clearance fit. The guide shaft 12 is further sleeved with an elastic member 13, 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, one end of the guide shaft 12 is inserted into the valve core 21, so that 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.

[0044] In an embodiment, please refer to Figures 1 to 4 The air passage 11 has two openings, a first opening 111 and a second opening 112, and the cross section of the air passage 11 can have various shapes, such as rectangular or trapezoidal, etc., which are not limited herein. In a preferred embodiment, the path of the air passage 11 is "L" type, and the first opening 111 and the second opening 112 are respectively at the two ends of the "L" type. 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.

[0045] Specifically, the mounting seat 1 is provided with a spring limiting column 14 on the inner wall opposite to the second opening 112, the spring limiting column 14 can be fixed on the mounting seat 1 by welding or screw connection, or preferably the spring limiting column 14 is integrally formed with the mounting seat 1. The end of the spring limiting column 14 towards 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, such as the mounting groove 141 can be a threaded hole, and the end of the guide shaft 12 away from the valve core 21 is provided with external threads, and can be connected in the threaded hole by screwing, or the guide shaft 12 can be detachably mounted in the mounting groove 141 by buckling, clamping and other ways.

[0046] The guide shaft 12 is located between the spring limiting column 14 and the valve core 21, the valve core 21 can be moved along the guide shaft 12 towards or away from the second opening 112, the elastic member 13 is preferably a spring, one end of which can be sleeved outside the spring limiting column 14, and the other end can be sleeved at the end of the second part 212 away from the first part 211 of the valve core 21.

[0047] It is worth mentioning that, in a preferred embodiment, in a free state, the spring forces the diaphragm 22 to be located at the first position to close the second opening 112, at this time the spring is in a normal state or a compressed state, in this embodiment, the end of the second part 212 away from the first part 211 is arranged in a stepped manner, and one end of the spring abuts against the stepped structure to push the diaphragm 22 to close the second opening 112.

[0048] It should be noted that the mounting seat 1 is detachably provided with an abutting member 40 at the second opening 112 of the air passage 11, the abutting member 40 is provided with a through hole 401 penetrating along the path of the air passage 11 and communicating with the air passage 11, and the outer wall of the abutting member 40 is tightly fitted with the inner wall of the second opening 112 of the air passage 11, so that the airflow in the air passage 11 can only flow out through the through hole 401 when flowing to the second opening 112.

[0049] It should be noted that one end of the through hole 401 is opposite to the diaphragm 22, and the radial dimension of the through hole 401 is smaller than the radial dimension of the diaphragm 22, in a free state, the diaphragm 22 is abutted against the through hole 401 of the abutting member 40 under the action of the spring force, so as to block the one end of the through hole 401, thereby completely closing the second opening 112 of the air passage 11. In addition, the end of the abutting member 40 towards the diaphragm 22 is provided with a circular truncated cone-shaped boss 402, and the boss 402 is provided with an abutting edge 403 away from the abutting member 40, and the diaphragm 22 can be abutted against the abutting edge 403. By arranging the abutting edge 403, the diaphragm 22 can be abutted against the abutting edge 403 to block the through hole 401.

[0050] In a specific embodiment, the inner wall of the air passage 11 is provided with a plurality of connecting grooves 50, and the abutting member 40 is provided with a connecting block 51 corresponding to the position of the connecting grooves 50; or the abutting member 40 is provided with a plurality of connecting grooves 50, and the inner wall of the air passage 11 is provided with a connecting block 51 corresponding to the position of the connecting grooves 50. When the abutting member 40 is inserted into the air passage 11, the connecting block 51 can be inserted into the connecting groove 50, and the connecting block 51 can be clamped in the connecting groove 50 by twisting the abutting member 40, and the clamping state of the connecting block 51 can be released by twisting the abutting member 40 in the opposite direction, thereby realizing the detachable connection between the abutting member 40 and the mounting seat 1.

[0051] Specifically, the connecting groove 50 comprises 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 communicated with the end of the movable end 501 away from the second opening 112, and the clamping end 502 is arranged at a preset angle with the movable end 501, and the preset angle is preferably a right angle.

[0052] The connecting block 51 can be inserted into the movable end 501 and the clamping end 502, and the abutting piece 40 can be inserted into the air passage 11 from the second opening 112. During the insertion process, the outer wall of the abutting piece 40 is tightly fitted with the inner wall of the air passage 11. The connecting block 51 is aligned with the movable end 501, the connecting block 51 is inserted into the movable end 501, and when the connecting block 51 moves to the connecting position of the clamping end 502 and the movable end 501, the abutting piece 40 is continuously moved to move the connecting block 51 to the opening path of the clamping end 502. Then, the abutting piece 40 is twisted to drive the connecting block 51 to move into the clamping end 502. The cooperation between the connecting block 51 and the clamping end 502 can prevent the abutting piece 40 from moving along the air passage 11, so as to stably install the abutting piece 40 in the air passage 11.

[0053] It should be noted that the end of the abutting piece 40 away from the boss 402 is also provided with at least one driving block 404. By pinching the driving block 404, the abutting piece 40 can be picked up and placed in the air passage 11. When the abutting piece 40 moves to the corresponding position, the driving block 404 can be driven to twist the abutting piece 40.

[0054] In order to increase the sealing between the abutting piece 40 and the mounting seat 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. The sealing ring 406 is a rubber ring or a silica gel ring, etc. The sealing ring 406 protrudes from the outer wall of the abutting piece 40. When the abutting piece 40 is inserted into the air passage 11, the sealing ring 406 abuts against the inner wall of the air passage 11 to increase the sealing.

[0055] In an embodiment, the driving assembly 30 is an electromagnetic valve, which has a movable shaft core 31. The electromagnetic valve can drive the shaft core 31 to move. The electromagnetic valve is a prior art, and its internal structure and how to drive the shaft core 31 to move are also prior arts, which will not be described in detail here.

[0056] In the preferred embodiment, in the free state, the diaphragm 22 abuts against the abutting edge 403 to close the through hole 401, when it is needed to open the through hole 401, the electromagnetic valve is started to drive the shaft core 31 to move through the through hole 401 towards the diaphragm 22, after abutting against the diaphragm 22, the shaft core 31 is continuously controlled to move to force the diaphragm 22 to move away from the abutting edge 403 towards the spring limiting column 14 against the elastic force, thereby realizing the opening of the through hole 401. When it is needed to close the through hole 401 again, the electromagnetic valve is only needed to be closed, at this time, the shaft core 31 is in the active state, under the action of the spring elastic force, the diaphragm 22 is driven to move towards the abutting edge 403 again until it abuts against the abutting edge 403 to close the through hole 401 again.

[0057] In a specific embodiment, please refer to Figure 5 The shaft core 31 is further provided with a clamping groove 311, the clamping groove 311 is located at one end of the shaft core 31 close to the electromagnetic valve, and the shaft core 31 is further sleeved with a limiting piece 312, part of the structure of the limiting piece 312 can be clamped in the clamping groove 311. The limiting piece 312 is located outside the electromagnetic valve, between the mounting seat 1 and the electromagnetic valve, when the diaphragm 22 is driven by the spring to move towards the abutting edge 403, the limiting piece 312 also moves towards the valve body 6 of the electromagnetic valve, when the diaphragm 22 just abuts against the abutting edge 403, the limiting piece 312 just abuts against the valve body 6 of the electromagnetic valve, or is about to abut against the valve body 6. By setting the limiting piece 312, the stopping position of the shaft core 31 can be limited, so that the end of the shaft core 31 can be close to the diaphragm 22, so as to quickly drive the diaphragm 22 to move away from the abutting edge 403 next time, thereby increasing the response speed.

[0058] On the other hand, please refer to Figure 1 and Figure 6 The embodiment of the present application further provides an inhalation valve, the inhalation valve comprising a valve body 6 and the safety valve, the valve body 6 has a main gas passage 61 for gas flow inside, and the safety valve is installed at the first opening 111 of the valve body 6, and the first opening 111 of the air passage 11 is communicated with the main gas passage 61. The gas flow in the main gas passage 61 can enter the air passage 11 through the first opening 111.

[0059] Specifically, one end of the valve body 6 is provided with a pressure relief port 62, the pressure relief port 62 can be inserted and fitted at the end of the first opening 111 of the air passage 11, and can be detachably connected through insertion, buckling, clamping or screwing connection, or the inhalation valve and the safety valve can be integrally arranged. The valve body 6 is further provided with a mounting bracket 63, and the mounting seat 1 and the electromagnetic valve are both mounted on the mounting bracket 63.

[0060] In still another aspect, the embodiment of the present application further provides a breathing machine, the breathing machine comprising the inhalation valve.

[0061] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, as long as the combination of the technical features does not exist in contradiction, it shall be considered within the scope of the present disclosure.

[0062] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it shall not be understood as a limitation on the patent application scope. It shall be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent shall be subject to the appended claims.

Claims

1. A safety valve, characterized in that, include: The mounting base has a through-ventilation channel; A sealing assembly is elastically connected to the mounting base. The sealing assembly includes a valve core movably disposed within the mounting base and a diaphragm sleeved on the valve core. The valve core has a first part and a second part. The first part is disc-shaped, and the second part is cylindrical and fixedly connected to the middle position of the first part. The first part and the second part are T-shaped. The diaphragm is sleeved outside the first part. The sealing assembly has a first position on the mounting base that can close the vent and a second position that can open the vent. In a free state, an elastic force forces the sealing assembly to be in the first position or the second position. The mounting base is detachably connected to an abutment at one opening of the air passage. The abutment has a through hole. The abutment has a frustum-shaped boss protruding from one end facing the diaphragm. The end of the boss away from the abutment has an abutment edge. The diaphragm can abut against the abutment edge to close the through hole. The drive assembly, which is a solenoid valve, has a movable shaft core capable of driving the sealing assembly to move against elastic force, so that the sealing assembly can change between a first position and a second position. The shaft core is provided with a slot, and a limiting member with a portion of its structure engaging in the slot is also sleeved on the shaft core. The limiting member is located between the mounting base and the solenoid valve to limit the position of the shaft core.

2. The safety valve according to claim 1, characterized in that, A guide shaft is fixedly connected inside the mounting base, the valve core is sleeved on the guide shaft, and an elastic element is also sleeved on the guide shaft. One end of the elastic element is connected to one end of the valve core to provide elastic force to the valve core.

3. The safety valve according to any one of claims 1-2, characterized in that, The vent has two openings, the sealing assembly is disposed between the two openings, the outer wall of the abutment is tightly fitted to the inner wall of the vent, so that airflow can only flow out through the through hole, and the sealing assembly can abut against the through hole to seal the through hole.

4. The safety valve according to claim 3, characterized in that, The inner wall of the ventilation duct is provided with multiple connecting grooves, and the abutment is provided with a connecting block at the position corresponding to the connecting groove; Alternatively, the abutting member may be provided with multiple connecting grooves, and the inner wall of the vent may be provided with connecting blocks corresponding to the positions of the connecting grooves; The connecting block can be inserted into the connecting groove, and the connecting block can be locked into the connecting groove by twisting the abutment.

5. The safety valve according to claim 4, characterized in that, The connecting groove includes a movable end and a snap-fit ​​end. The movable end extends from the opening of the air passage along the opening direction of the air passage. One end of the snap-fit ​​end is connected to the end of the movable end away from the opening and is set at a preset angle with the movable end.

6. An intake valve, characterized in that, Includes a valve body having a main air passage for airflow; And a safety valve as described in any one of claims 1-5, wherein the safety valve is mounted on the valve body and the vent passage is connected to the main vent passage.

7. A ventilator, characterized in that, Includes the intake valve as described in claim 6.

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