Adjustable oxygen concentration venturi valve

Abstract

The present invention provides an adjustable oxygen concentration venturi valve, including an air inlet plug, a rotating sleeve and a fixed sleeve, a fixed air inlet window is provided on the outer peripheral surface of the lower cavity of the fixed sleeve, a rotating air inlet window is provided on the rotating part to match the fixed air inlet window position, and the fixed air inlet window and the rotating air inlet window form a mixed air inlet window for inputting air into the lower cavity of the fixed sleeve when the rotating part rotates relative to the fixed sleeve; the surface of the rotating sleeve has an arrow indication, and the outer peripheral surface of the fixed sleeve corresponding to the direction indicated by the arrow has an air intake concentration mark. The present invention can adjust the size of the mixed air inlet window by rotating the rotating sleeve, thereby changing the supply concentration according to demand, and can realize the adjustment of multi-concentration ratio oxygen supply without equipping multiple valves, reducing the demand for valve inventory, and the adjustment is convenient, safe and fast, and convenient for oxygen inhalation operation.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a Venturi valve with adjustable oxygen concentration. Background Art

[0002] In clinical practice, common oxygen inhalation methods include nasal congestion, nasal catheter, mask method, Venturi mask, etc. The Venturi mask is made according to the Venturi principle, which generates negative pressure around the jet airflow and carries a certain amount of air into the mask from the open side seam or side hole. Because the oxygen supply hole has a certain caliber, the air inhaled from the mask side seam or measurement and control can be mixed with oxygen to maintain a fixed ratio. By adjusting the size of the mask side seam and the flow rate of driving oxygen, the ratio of air to oxygen can be changed, and the concentration of inhaled oxygen is determined by the size of the ratio. At present, the existing Venturi valves are usually fixed valves, and the oxygen concentration of fixed valves cannot be adjusted, that is, hospitals need to reserve valves of various concentration ratios to facilitate the selection and use of different concentration ratios of oxygen supply needs. The hospital needs to store a large number of valves, and when changing the oxygen supply concentration, the valve needs to be replaced accordingly, which is cumbersome. Summary of the invention

[0003] The technical problem to be solved by the present invention is: in order to overcome the deficiencies of the prior art, the present invention provides an adjustable oxygen concentration Venturi valve which is easy to operate, can adjust the oxygen input concentration according to demand, simplifies the operation process and reduces inventory costs.

[0004] The technical solution adopted by the present invention to solve the technical problem is: an adjustable oxygen concentration Venturi valve, comprising an inlet plug, a rotating sleeve and a fixed sleeve, wherein the fixed sleeve is a straight-cylindrical structure, wherein the straight-cylindrical structure has a partition along its radial plane to divide the straight-cylindrical structure into an upper cavity and a lower cavity, wherein an inlet pipe is provided on the lower plane of the partition, wherein the lower end of the inlet pipe has an air outlet, wherein the inlet plug has a valve insert connected to an oxygen delivery pipe, wherein the inlet plug is installed in the upper cavity of the fixed sleeve and the valve insert is connected to the inlet pipe. The rotating sleeve comprises a rotating part, the rotating part is sleeved on the outer circumference of the fixed sleeve, a fixed air inlet window is provided on the outer circumference of the lower cavity of the fixed sleeve, and a rotating air inlet window is provided on the rotating part to match the position of the fixed air inlet window, and the fixed air inlet window and the rotating air inlet window form a mixed air inlet window for inputting air into the lower cavity of the fixed sleeve when the rotating part rotates relative to the fixed sleeve; the surface of the rotating sleeve has an arrow indication, and the outer circumference of the fixed sleeve corresponding to the direction indicated by the arrow has an intake concentration mark.

[0005] In the above scheme, a mixed air intake window for air entry is formed by cleverly cooperating with the rotating sleeve and the fixed sleeve through the rotational coordination of the fixed air intake window and the rotating air intake window, and the air intake size of the mixed air intake window can be adjusted and controlled by rotating the rotating sleeve relative to the fixed sleeve.

[0006] Furthermore, in order to expand the oxygen supply concentration range, the lower end of the partition has two inlet pipes with different outlet diameters, and the centers of the two inlet pipes are symmetrically distributed with respect to the center of the partition, and the valve insert on the inlet plug head is eccentrically distributed on the inlet plug head with the center of the partition as the center and corresponding to any inlet pipe position. By providing oxygen to the Venturi valve through inlet pipes with different outlet diameters, the oxygen supply concentration range of the Venturi valve can be further expanded by distinguishing the diameters.

[0007] Furthermore, in order to facilitate the conversion of the air intake plug and effectively limit the rotating sleeve, a conversion arm extending upward is fixed on the rotating part, and the air intake plug has a conversion groove for the conversion arm to extend into. The conversion groove is an arc groove with the center of the partition as the center of the circle, and the arc length of the arc groove is adapted to the maximum rotation stroke of the relative rotation of the rotating sleeve and the fixed sleeve.

[0008] Furthermore, in order to facilitate the conversion of the intake pipe of the intake plug and simultaneously lock and fix the position of the intake plug, the circumferential side surface of the lower end surface of the intake plug protrudes outward and has an outer flange, and a metal spring is arranged around the circumferential outer surface of the intake plug, one end of the metal spring is fixed to the upper end surface of the outer flange, and the other end is fixed to the upper end surface of the upper cavity, and the metal spring elastically connects the intake plug to the upper cavity; the circumferential outer surface of the outer flange is provided with a limiting flange, and the inner wall of the upper cavity has a convex strip corresponding to the limiting flange and cooperating with the limiting flange for limiting engagement, and the axial length of the convex strip along the upper cavity is less than the axial tensile deformation length of the metal spring.

[0009] Furthermore, in order to facilitate long-term and stable air supply according to the intake concentration requirements, it is necessary to correspond to different intake concentration marks, and the rotating sleeve and the fixed sleeve are locked in position after rotation. The lower cavity of the fixed sleeve includes an inner tube part and an outer tube part that are fixedly connected. The inner tube part has the same outer diameter as the straight cylindrical structure of the upper cavity, and the outer tube part has a larger diameter than the inner tube part and is sleeved outside the inner tube part. There is a connecting end face between the upper end faces of the inner tube part and the outer tube part, and the connecting end face is protruded with a limiting protrusion. The contact part between the rotating sleeve and the connecting end face has intake positioning grooves that cooperate with the limiting protrusions at intervals corresponding to the intake concentration mark. In this process, the cooperation of the limiting protrusion and the intake positioning groove can prevent the rotating sleeve and the fixed sleeve from being locked after the air supply concentration is adjusted to the right position, and prevent rotation.

[0010] Furthermore, in order to facilitate the synchronous conversion of the fixed sleeve and the rotating sleeve to the corresponding marking area when the intake pipe is converted, the two intake pipes of different diameters are respectively the intake pipe A and the intake pipe B, and the intake concentration markings corresponding to the intake pipe A are respectively A1~A aThe intake concentration marks corresponding to the intake pipe B are B1 to B b , where A1~A a 、B1~B b Both are gradually increasing values, and B1 is greater than A a The intake air concentration is marked as A1 to A a , B b The air inlet positioning grooves include (a+b-2) single-concentration air inlet positioning grooves and 1 cross-concentration air inlet positioning groove, A1~A a-1 , B b-1 ~B1 correspond to the single concentration air intake positioning slot, A a and B b The corresponding cross-concentration air intake positioning groove is set at A1~A a-1 The corresponding single concentration air intake positioning slot and B b-1 Between the single concentration air intake positioning grooves corresponding to B1, and the cross-concentration air intake positioning grooves corresponding to A a and B b There is no limit between the two concentration marks. When the concentration is adjusted in the same caliber intake pipe, it is locked through the single concentration intake positioning slot. When adjusting the intake pipe caliber, the two converted concentrations are A a and B b , A a and B b Corresponding to the cross-concentration air intake positioning groove, there is no infinite position obstruction between the two air intake concentration marks. When converting the air intake pipe, the rotating sleeve can be directly rotated so that the arrow indication can point to the corresponding air intake concentration mark after adjusting the air intake pipe.

[0011] Furthermore, in order to facilitate the relative rotation after the rotating sleeve and the fixed sleeve are locked and unlocked, the rotating sleeve also includes a pin fixed under the rotating part, and the connecting end surface is provided with a rotation groove for the pin to be inserted, and the pin penetrates into the fixed sleeve through the rotation groove. An elastic member that can be elastically deformed up and down along the inner wall of the fixed sleeve is provided in the fixed sleeve, and the lower end of the pin is hooked on the elastic member, and the elastic member elastically presses the rotating part and the fixed sleeve.

[0012] Furthermore, in order to facilitate the elastic member to better position and lock the rotating sleeve and the fixed sleeve, the elastic member includes an annular member and a lower support leg fixed on the annular member, the plug leg is hooked with the lower end surface of the annular member, the lower support leg is provided with an oblique elastic arm, and there is an angle between the oblique elastic arm and the annular member, the inner wall of the fixed sleeve corresponding to the lower support leg has a limiting groove for the lower support leg to move axially along the inner wall of the fixed sleeve, and the oblique elastic arm is elastically connected between the inner wall of the fixed sleeve corresponding to the top of the limiting groove and the lower support leg. When the rotating sleeve and the fixed sleeve rotate, the bottom of the plug leg slides circumferentially along the bottom of the annular member.

[0013] The beneficial effect of the present invention is that the adjustable oxygen concentration Venturi valve provided by the present invention can adjust the size of the mixed air intake window by rotating the rotating sleeve, thereby changing the supply concentration according to demand, and can achieve the adjustment of multi-concentration ratio oxygen supply without equipping a plurality of valves, thereby reducing the demand for valve inventory, and the adjustment is convenient, safe and quick to use, and is convenient for oxygen inhalation operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a structural schematic diagram of the best embodiment of the present invention.

[0016] Figure 2 yes Figure 1 Sectional view of AA.

[0017] Figure 3 It is a schematic structural diagram of another direction of the optimal embodiment of the present invention (the metal spring is not shown).

[0018] Figure 4 yes Figure 3 Cross-sectional view of BB.

[0019] Figure 5 It is a three-dimensional diagram of the air intake plug head in the best embodiment of the present invention.

[0020] Figure 6 It is a three-dimensional diagram of a metal spring in the best embodiment of the present invention.

[0021] Figure 7 It is a three-dimensional diagram of a rotating sleeve in the best embodiment of the present invention.

[0022] Figure 8 It is a three-dimensional diagram of the elastic member in the best embodiment of the present invention.

[0023] Fig. 9 It is a stereoscopic diagram of the rotating sleeve from another perspective in the optimal embodiment of the present invention.

[0024] Fig.10It is a three-dimensional diagram of a fixed sleeve in the best embodiment of the present invention.

[0025] Fig.11 It is a stereoscopic view of the fixed sleeve from another perspective in the optimal embodiment of the present invention.

[0026] In the figure, 1, air intake plug head 2, partition 3, metal spring 4, inner tube 5, rotating part 6, air intake pipe 7, upper cavity 8, lower cavity 9, valve insert 10, pin 11, ring part 12, oblique elastic arm 13, lower support leg 14, rotating air intake window 15, mixed air intake window 16, arrow indication 17, air intake concentration mark 18, outer flange 19, limiting flange 20, convex strip 21, conversion arm 22, conversion groove 23, outer tube 24, connecting end face 25, rotating groove 26, single-concentration air intake positioning groove 27, cross-concentration air intake positioning groove 28, limiting protrusion 29, limiting groove. DETAILED DESCRIPTION

[0027] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0028] like Figures 1 to 11 The adjustable oxygen concentration Venturi valve shown is the optimal embodiment of the present invention, comprising an air inlet plug 1, a rotating sleeve and a fixed sleeve, wherein the fixed sleeve is a straight cylindrical structure, wherein the straight cylindrical structure has a partition 2 along its radial plane for dividing the straight cylindrical structure into an upper chamber 7 and a lower chamber 8, wherein an air inlet pipe 6 is provided on the lower plane of the partition 2, wherein the lower end of the air inlet pipe 6 has an air outlet, and the air inlet plug 1 has a valve insert 9 connected to the oxygen supply pipeline, wherein the air inlet plug 1 is installed in the upper chamber 7 of the fixed sleeve and the valve insert 9 is connected to the air inlet pipe 6 pipeline.

[0029] In order to expand the oxygen supply concentration range, the lower end of the partition 2 has two air inlet pipes 6 with different air outlet diameters, and the centers of the two air inlet pipes 6 are symmetrically distributed with respect to the center of the partition 2. The valve insert 9 on the air inlet plug 1 is eccentrically distributed on the air inlet plug 1 with the center of the partition 2 as the center and corresponding to the position of any air inlet pipe 6. The air inlet pipes 6 with different air outlet diameters are used to provide oxygen to the Venturi valve, and the oxygen supply concentration range of the Venturi valve can be further expanded by distinguishing the diameters.

[0030] Corresponding to two intake pipes 6 of different calibers, in order to facilitate the intake plug 1 to switch the intake pipe 6 and simultaneously lock and fix the position of the intake plug 1, the circumferential side surface of the lower end surface of the intake plug 1 protrudes outward with an outer flange 18, and a metal spring 3 is arranged around the circumferential outer surface of the intake plug 1, one end of the metal spring 3 is fixed to the upper end surface of the outer flange 18, and the other end is fixed to the upper end surface of the upper cavity 7, and the metal spring 3 elastically connects the intake plug 1 in the upper cavity 7; the circumferential outer surface of the outer flange 18 is provided with a limiting flange 19, and the inner wall of the upper cavity 7 has a convex strip 20 corresponding to the limiting flange 19 and cooperating with the limiting flange 19 for limiting engagement, and the axial length of the convex strip 20 along the upper cavity 7 is less than the axial tensile deformation length of the metal spring 3. The limiting flange 19 cooperates with the convex strip 20 to lock the air inlet plug 1 and the upper cavity 7 of the fixed sleeve in the radial direction. At the same time, through the elastic connection of the metal spring 3, the air inlet plug 1 and the fixed sleeve can be tightened and crimped in the axial direction to achieve relative rotation and fixation of the air inlet plug 1 and the fixed sleeve.

[0031] The rotating sleeve includes a rotating part 5, and the rotating part 5 is sleeved on the outer circumference of the fixed sleeve. In order to facilitate the relative rotation after the rotating sleeve and the fixed sleeve are locked and unlocked, the rotating sleeve also includes a pin 10 fixed below the rotating part 5, and the connecting end surface 24 is provided with a rotation groove 25 for the pin 10 to be inserted. The pin 10 penetrates into the fixed sleeve through the rotation groove 25. The fixed sleeve is provided with an elastic member that can be elastically deformed up and down along the inner wall of the fixed sleeve. The lower end of the pin 10 is hooked on the elastic member, and the elastic member elastically presses the rotating part 5 and the fixed sleeve.

[0032] In order to facilitate the elastic member to better position and lock the rotating sleeve and the fixed sleeve, the elastic member includes an annular member 11 and a lower leg 13 fixed on the annular member 11, the pin 10 is hooked with the lower end surface of the annular member 11, and the lower leg 13 is provided with an oblique elastic arm 12, and there is an angle between the oblique elastic arm 12 and the annular member 11, and the inner wall of the fixed sleeve corresponding to the lower leg 13 has a limiting groove 29 for the lower leg 13 to move axially along the inner wall of the fixed sleeve, and the oblique elastic arm 12 is elastically connected between the inner wall of the fixed sleeve corresponding to the top of the limiting groove 29 and the lower leg 13. When the rotating sleeve and the fixed sleeve rotate, the bottom of the pin 10 slides circumferentially along the bottom of the annular member 11.

[0033] A fixed air intake window is provided on the outer circumference of the lower cavity 8 of the fixed sleeve, and a rotating air intake window 14 is provided on the rotating part 5 to match the fixed air intake window. When the rotating part 5 rotates relative to the fixed sleeve, the fixed air intake window and the rotating air intake window 14 form a mixed air intake window 15 for inputting air into the lower cavity 8 of the fixed sleeve; an arrow mark 16 is provided on the surface of the rotating sleeve, and an intake air concentration mark 17 is provided on the outer circumference of the fixed sleeve corresponding to the direction of the arrow mark 16. Corresponding to the two intake pipes 6 of different diameters, the intake air concentration mark 17 also has two different concentration ranges.

[0034] After being adjusted in place, in order to facilitate long-term and stable air supply according to the intake concentration requirements, it is necessary to correspond to different intake concentration marks 17, and the rotating sleeve and the fixed sleeve are locked in position after rotation. The lower chamber 8 of the fixed sleeve includes an inner tube part 4 and an outer tube part 23 that are fixedly connected. The inner tube part 4 has the same outer diameter as the straight cylindrical structure of the upper chamber 7, and the outer tube part 23 has a larger diameter than the inner tube part 4 and is sleeved outside the inner tube part 4. There is a connecting end face 24 between the upper end faces of the inner tube part 4 and the outer tube part 23, and a limiting protrusion 28 is protruded on the connecting end face 24. The contact part between the rotating sleeve and the connecting end face 24 corresponds to the intake concentration mark 17 and has intake positioning grooves that cooperate with the limiting protrusion 28 at intervals. In this process, the limiting protrusion 28 can cooperate with the intake positioning groove to prevent the rotating sleeve and the fixed sleeve from being locked after the air supply concentration is adjusted in place, and to prevent rotation.

[0035] In actual design, the numerical value and numerical distribution position of the intake concentration mark 17 can be reasonably designed to correspond to two intake pipes 6 with different supply concentration ranges, and the rotating sleeve is automatically adjusted to the corresponding numerical range when the intake pipe 6 is switched. In order to facilitate the synchronous switching of the fixed sleeve and the rotating sleeve to the corresponding marking area when the intake pipe 6 is switched, the two intake pipes 6 with different diameters of the intake pipe 6 are respectively the intake pipe A and the intake pipe B, the intake concentration marks 17 corresponding to the intake pipe A are respectively 26%, 28%, 31% and 35%, and the intake concentration marks 17 corresponding to the intake pipe B are respectively 40%, 45%, and 50%, and the intake concentration marks 17 are arranged along the outer peripheral surface of the outer tube portion 23 in the order of 40%, 45%, 50%, 26%, 28%, 31% and 35%.

[0036] Corresponding to the above-mentioned intake concentration, the intake positioning grooves include 5 single-concentration intake positioning grooves 26 and 1 cross-concentration intake positioning groove 27. The 26%, 28%, 31%, 40%, and 45% correspond to the single-concentration intake positioning grooves 26, A a and B bThe corresponding cross-concentration air intake positioning groove 27 is set between the single-concentration air intake positioning groove 26 corresponding to 26%, 28%, and 31% and the single-concentration air intake positioning groove 26 corresponding to 40% and 45%, and there is no limit blockage between the two concentration marks 17 of 35% and 50% in the cross-concentration air intake positioning groove 27. When the concentration is adjusted in the same caliber air intake pipe 6, it is locked through the single-concentration air intake positioning groove 26. When the caliber of the air intake pipe 6 is adjusted, the two converted concentrations are 35% and 50%. 35% and 50% correspond to the cross-concentration air intake positioning groove 27. There is no limit blockage between the two air intake concentration marks 17. When the air intake pipe 6 is converted, the rotating sleeve can be directly rotated so that the arrow indication 16 can point to the corresponding air intake concentration mark 17 after the air intake pipe 6 is adjusted.

[0037] In order to facilitate the conversion of the intake plug 1 to correspond to different intake pipes 6, the rotating sleeve can be effectively limited, the rotating part 5 is fixed with a conversion arm 21 extending upward, and the intake plug 1 is provided with a conversion groove 22 for the conversion arm to extend into. The conversion groove 22 is an arc groove with the center of the partition 2 as the center of the circle, and the arc length of the arc groove is adapted to the maximum rotation stroke of the relative rotation of the rotating sleeve and the fixed sleeve. When there is no need to convert the intake pipe 6, the intake plug 1 is limited by the elastic force of the spring and connected to the upper end of the fixed sleeve. At this time, the conversion arm 21 is inserted into the conversion groove 22. When adjusting within the intake concentration range corresponding to the intake pipe 6 of the same caliber, the conversion arm 21 will not interfere with the rotation between the rotating sleeve and the fixed sleeve. When the air inlet plug 1 switches the air inlet pipe 6, when the air inlet plug 1 is pulled out, after the air inlet plug 1 is rotated to the right position, the conversion arm 21 can be moved accordingly, so that the conversion arm 21 drives the rotating sleeve to rotate synchronously, completing the conversion of the corresponding marking position in the cross-concentration air inlet positioning groove 27.

[0038] Usage process:

[0039] 1. The valve insert 9 of the air inlet plug 1 is plugged with the external oxygen tube. In the initial state, the valve insert 9 of the air inlet plug 1 is connected to the air inlet pipe 6 corresponding to 26%-35%. If the air inlet concentration to be adjusted is any one of 26%, 28%, 31% and 35%, hold the fixed sleeve with one hand and the rotating sleeve with the other hand, and pull the rotating sleeve outward relative to the fixed sleeve. At this time, the pin 10 of the rotating sleeve drives the annular member 11 in the fixed sleeve to move axially along the fixed sleeve. Due to the presence of the limit groove 29, the annular member 11 will not rotate with the fixed sleeve at an angle, and can only squeeze the oblique elastic arm 12 relative to the connecting end face 24. At this time, the limiting protrusion 28 is unlocked from the air intake positioning groove, and then the rotating sleeve is rotated relative to the fixed sleeve as required, so that the arrow indication 16 rotates to the air intake concentration mark 17 of the selected concentration, and then the rotating sleeve is released. Under the action of the elastic force, the oblique elastic arm 12 relatively tightens the fixed sleeve and the rotating sleeve, and the limiting protrusion 28 is relatively engaged with the air intake positioning groove where the selected air intake concentration is located, completing the locking and positioning.

[0040] 2. When the intake concentration needs to be adjusted to any one of 40%, 45%, and 50%, first rotate the rotating sleeve and the fixed sleeve to the intake concentration mark 17 corresponding to 35% corresponding to the arrow indication 16. At this time, the limiting protrusion 28 enters the cross-concentration intake positioning groove 27. Then hold the intake plug 1 with one hand and the fixed sleeve with the other hand, pull out the intake plug 1 relative to the fixed sleeve, unlock the limiting flange 19 of the intake plug 1 and the convex strip 20 of the fixed sleeve, and then rotate the intake plug 1 to connect the valve insert 9 to the intake pipe 6 corresponding to 40%-50%, and then release the intake plug 1. Under the action of the metal spring 3, the limiting flange 19 of the intake plug 1 continues to clamp with the convex strip 20 while the intake plug 1 and the fixed sleeve are locked. During the rotation of the air inlet plug 1, the conversion arm 21 is synchronously toggled, so that the conversion arm 21 drives the rotating sleeve to rotate synchronously, completing the transformation of the corresponding marking position in the cross-concentration air inlet positioning groove 27, that is, rotating from 35% to 50%. Then, the relative rotation between the fixed sleeve and the rotating sleeve can be continued to complete the rotation adjustment of any concentration among 40%, 45%, and 50%.

[0041] 3. When the initial intake air concentration is adjusted to any one of 40%, 45%, and 50%, and needs to be adjusted to any one of 26%, 28%, 31%, and 35%, the intake plug 1 is rotated in the opposite direction, and the conversion arm 21 is toggled in the opposite direction so that the limiting protrusion 28 rotates in the span-concentration intake positioning groove 27, driving the arrow mark corresponding to the concentration to first perform the span conversion, and then rotate to the required concentration within the corresponding concentration span as needed.

[0042] The adjustable oxygen concentration Venturi valve designed in this way cleverly forms a mixed air intake window 15 for air to enter through the rotational coordination of the rotating sleeve and the fixed sleeve, and through the coordination of the fixed air intake window and the rotating air intake window 14, and the air intake size of the mixed air intake window 15 can be adjusted and controlled by rotating the rotating sleeve relative to the fixed sleeve. The size of the mixed air intake window 15 can be adjusted by rotating the rotating sleeve, so as to change the supply concentration according to demand. At the same time, during the rotation adjustment, the design of the elastic part realizes the locking and fixing after the adjustment is in place, so as to maintain the relative stability of the position of the mixed air intake window 15 and maintain a stable air supply. For medical service institutions, it is not necessary to equip multiple valves to achieve the adjustment of multi-concentration ratio oxygen supply, reduce the demand for valve inventory, and the adjustment is convenient, safe and fast, which is convenient for oxygen inhalation operation.

[0043] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A Venturi valve with adjustable oxygen concentration, characterized in that: The invention comprises an air inlet plug (1), a rotating sleeve and a fixed sleeve, wherein the fixed sleeve is a straight-cylindrical structure, wherein the straight-cylindrical structure has a partition (2) along its radial plane for dividing the straight-cylindrical structure into an upper chamber (7) and a lower chamber (8), wherein an air inlet pipe (6) is provided on the lower plane of the partition (2), wherein the lower end of the air inlet pipe (6) has an air outlet, and the air inlet plug (1) has a valve insert (9) connected to an oxygen supply pipe, wherein the air inlet plug (1) is installed in the upper chamber (7) of the fixed sleeve and the valve insert (9) is connected to the air inlet pipe (6); the rotating sleeve comprises a rotating portion (5 ), the rotating part (5) is sleeved on the outer circumference of the fixed sleeve, the outer circumference of the lower cavity (8) of the fixed sleeve is provided with a fixed air intake window, and the rotating part (5) is provided with a rotating air intake window (14) in coordination with the fixed air intake window, and the fixed air intake window and the rotating air intake window (14) form a mixed air intake window (15) for inputting air into the lower cavity (8) of the fixed sleeve when the rotating part (5) rotates relative to the fixed sleeve; the surface of the rotating sleeve is provided with an arrow mark (16), and the outer circumference of the fixed sleeve corresponding to the direction of the arrow mark (16) is provided with an intake air concentration mark (17); The lower end of the partition (2) is provided with two air inlet pipes (6) with different air outlet diameters, and the centers of the two air inlet pipes (6) are symmetrically distributed with respect to the center of the partition (2); the valve insert pipe (9) on the air inlet plug head (1) is eccentrically distributed on the air inlet plug head (1) with the center of the partition (2) as the center and corresponding to the position of any air inlet pipe (6); The circumferential side surface of the lower end surface of the air inlet plug (1) protrudes outward and has an outer flange (18); a metal spring (3) is arranged around the circumferential outer surface of the air inlet plug (1); one end of the metal spring (3) is fixed to the upper end surface of the outer flange (18), and the other end is fixed to the upper end surface of the upper cavity (7); the metal spring (3) elastically connects the air inlet plug (1) in the upper cavity (7); a limiting flange (19) is provided on the circumferential outer surface of the outer flange (18); and a convex strip (20) corresponding to the limiting flange (19) is provided on the inner wall of the upper cavity (7) and is engaged with the limiting flange (19); the axial length of the convex strip (20) along the upper cavity (7) is less than the axial tensile deformation length of the metal spring (3); The lower chamber (8) of the fixed sleeve comprises an inner tube portion (4) and an outer tube portion (23) which are fixedly connected. The inner tube portion (4) and the straight cylindrical structure of the upper chamber (7) have the same outer diameter, and the outer tube portion (23) has a larger diameter than the inner tube portion (4) and is sleeved outside the inner tube portion (4). A connecting end surface (24) is provided between the upper end surfaces of the inner tube portion (4) and the outer tube portion (23). A limiting protrusion (28) is protruded from the connecting end surface (24). The contact portion between the rotating sleeve and the connecting end surface (24) has air intake positioning grooves corresponding to the air intake concentration mark (17) and correspondingly spaced to cooperate with the limiting protrusion (28).

2. The adjustable oxygen concentration Venturi valve according to claim 1, characterized in that: A conversion arm (21) extending upward is fixed on the rotating portion (5), and a conversion groove (22) for the conversion arm to extend into is provided on the air inlet plug head (1). The conversion groove (22) is an arc-shaped groove with the center of the partition (2) as the center of the circle, and the arc length of the arc-shaped groove is adapted to the maximum rotation stroke of the relative rotation of the rotating sleeve and the fixed sleeve.

3. The adjustable oxygen concentration Venturi valve according to claim 1, characterized in that: The two intake pipes (6) of different diameters are respectively an intake pipe (6) A and an intake pipe (6) B. The intake concentration marks (17) corresponding to the intake pipe (6) A are respectively A1 to A a The intake concentration marks (17) corresponding to the intake pipe (6) B are B1~B b , where A1~A a 、B1~B b Both are gradually increasing values, and B1 is greater than A a ; The intake air concentration mark (17) is A1~A a , B b The air inlet positioning grooves are arranged in the order of A1 to A1 along the outer peripheral surface of the outer tube portion (23); the air inlet positioning grooves include (a+b-2) single-concentration air inlet positioning grooves (26) and one cross-concentration air inlet positioning groove (27), a-1 , B b-1 ~ B1 corresponds to the single concentration air intake positioning groove (26), A a and B b The corresponding cross-concentration air intake positioning groove (27) is set at A1~A a-1 The corresponding single concentration air intake positioning groove (26) and B b-1 ~ B1 corresponds to the single concentration air intake positioning groove (26), and the cross concentration air intake positioning groove (27) corresponds to A a and B b There is no infinite barrier between the two concentration marks.

4. The adjustable oxygen concentration Venturi valve according to claim 1, characterized in that: The rotating sleeve further comprises a plug pin (10) fixed below the rotating portion (5); the connecting end surface (24) comprises a rotating groove (25) for the plug pin (10) to be inserted into; the plug pin (10) penetrates into the fixed sleeve through the rotating groove (25); an elastic member which can be elastically deformed up and down along the inner wall of the fixed sleeve is provided in the fixed sleeve; the lower end of the plug pin (10) is hooked on the elastic member; the elastic member elastically presses the rotating portion (5) and the fixed sleeve together.

5. The adjustable oxygen concentration Venturi valve according to claim 4, characterized in that: The elastic member comprises an annular member (11) and a lower support leg (13) fixed on the annular member (11); the plug pin (10) is hooked and engaged with the lower end surface of the annular member (11); the lower support leg (13) is provided with an oblique elastic arm (12); an angle is formed between the oblique elastic arm (12) and the annular member (11); the inner wall of the fixed sleeve corresponding to the lower support leg (13) is provided with a limiting groove (29) for the lower support leg (13) to move axially along the inner wall of the fixed sleeve; the oblique elastic arm (12) is elastically connected between the inner wall of the fixed sleeve corresponding to the top of the limiting groove (29) and the lower support leg (13).

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