CN215950492U - One-way valve system for medical vacuum negative pressure machine - Google Patents
One-way valve system for medical vacuum negative pressure machine Download PDFInfo
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- CN215950492U CN215950492U CN202121819181.2U CN202121819181U CN215950492U CN 215950492 U CN215950492 U CN 215950492U CN 202121819181 U CN202121819181 U CN 202121819181U CN 215950492 U CN215950492 U CN 215950492U
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Abstract
The utility model discloses a one-way valve system for a medical vacuum negative pressure machine, which comprises an adapter, a one-way valve, an air tap and a negative pressure pump which are sequentially connected, wherein the adapter and the air tap, the one-way valve and the air tap, and the air tap and the negative pressure pump are assembled in an interference fit mode, the interior of the one-way valve is in an interference fit structure, and flow holes which are uniformly distributed are arranged on the end surface of the one-way valve. The one-way valve system can realize that the air can only flow in one way, has small leakage amount to the outside air, can effectively promote the air tightness of the one-way valve system, and ensures the air tightness of the whole medical vacuum negative pressure machine system, thereby reducing the power consumption of the medical vacuum negative pressure machine, improving the control precision, reducing the noise and bringing better user experience.
Description
Technical Field
The utility model belongs to the technical field of one-way valve systems, and particularly relates to a one-way valve system for a medical vacuum negative pressure machine.
Background
In recent years, negative pressure wound therapy management is widely applied to healing treatment of various local tissue wounds as a closed negative pressure therapy technology, and the application of the negative pressure wound therapy management technology ensures that a negative pressure environment is formed on the surface of a tissue wound and promotes the wound healing.
Chinese patent application CN112943986A discloses a medical check valve, which mainly realizes the conduction of the upper and lower cavities through the deformation of the elastic sealing element, and the sealing element is easy to age, thereby causing air leakage. Chinese patent CN 213145482U discloses a medical springless check valve, which realizes the conduction of a valve body mainly through the deformation and movement of an elastic valve core, and also has the problems of air leakage or limited movement of the valve core caused by easy aging of the elastic valve core. The one-way valve system of the medical negative pressure machine commonly used in the market has low air tightness in the actual use process, and the following problems exist in the negative pressure wound treatment process: 1. the negative pressure pump needs to intermittently start pumping, so that the power consumption of the machine is large; 2. the control precision of the negative pressure value is not high, and fine treatment cannot be realized; 3. the problems that the noise is large, the rest of a patient is influenced and the like when the equipment is repeatedly started; 4. repeated activation of the device affects the negative pressure pump and battery life.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: aiming at the problems in the prior art, the utility model provides a one-way valve system for a medical vacuum negative pressure machine, which can realize that air can only flow in one way, has small leakage amount to outside air, and can effectively improve the air tightness of a negative pressure pump in the medical vacuum negative pressure machine, thereby reducing the power consumption of the medical vacuum negative pressure machine, improving the control precision, reducing the noise and bringing better user experience.
The technical scheme is as follows: in order to achieve the purpose of the utility model, the technical scheme adopted by the utility model is as follows:
the utility model provides a check valve system for vacuum negative pressure machine, includes check valve, adapter, air cock and negative pressure pump, places in the air cock in the check valve and preferred be close to its gas outlet end, wherein, the disk seat of check valve passes through interference fit mode be assembled between with the gas outlet of air cock, adapter and the air inlet of air cock, the air inlet of negative pressure pump and the gas outlet of air cock.
The interference fit is compact in structure, convenient to install and good in air tightness, and is particularly suitable for directional circulation of gas; the uniformly distributed flow holes are designed to ensure that the air pressure of each air channel is the same, so that the opening and closing processes of the check valve are ensured to respond timely and stably.
As a preferable scheme or a modified scheme:
still include baroceptor, the air cock is three air cocks, including three air cock air inlet (31), three air cock collection mouth (32) and three air cock gas outlet (33), wherein, three air cock collection mouth (32) adopt interference fit assembly mode to be connected with baroceptor (4).
The inner diameter sizes of the collecting opening and the air outlet of the air tap are smaller than that of the air inlet.
The air faucet at the interference fit part of the adapter, the one-way valve, the negative pressure pump, the air pressure sensor and the air faucet is made of elastic materials, preferably silica gel or rubber; the preferred shape is circular. The design can make full use of the elastic characteristics of the material, and further improves the air tightness of the joint of the component.
The adapter and the check valve are made of elastic materials, preferably plastic PP materials.
A protruding sealing gasket is arranged at any interference fit part inside the air faucet, and preferably, a protruding sealing gasket is arranged at any other interference fit part inside the air faucet except the interference fit part where the valve seat of the one-way valve is connected with the air faucet; the sealing washer and the air tap are of an integral structure and made of elastic materials, preferably silica gel or rubber; the shape of the sealing gasket is consistent with that of the interference fit part of the air tap, and is preferably O-shaped; preferably, the number of sealing gaskets is 3 or 5.
The inner diameter of the air nozzle air inlet is smaller than the outer diameter of the adapter air outlet; the inner diameter of the air outlet of the air tap is smaller than the outer diameter of the air inlet of the negative pressure pump; the inner diameter size of the air tap acquisition port is smaller than the outer diameter size of the air pressure sensor acquisition port; the outside diameter of the one-way valve seat is larger than the inside diameter of the air inlet and the air outlet of the air tap. The interference fit of the components can be realized by the distribution of the sizes, the interference fit structure is optimized to the maximum extent, and the air tightness and the installation convenience at the interface are guaranteed.
The adapter is luer adapter (1), including luer joint (11), connect spacing mouthful (12) and luer adapter gas outlet (13), connect spacing mouthful (12) and set up in luer joint (11) and luer adapter gas outlet (13) centre.
The end face of the valve seat of the one-way valve is provided with evenly distributed flow holes, and the distance between the outer edge of each flow hole and the inner wall of the end face of the valve seat is not less than the distance between the edge of the umbrella door and the inner wall of the end face of the valve seat.
The valve and the valve seat of the one-way valve are assembled in an interference fit mode.
As an embodiment, the structure of the first one-way valve (7) is a combined structure of an umbrella-shaped valve (72) and a valve seat (71), and the valve faces one end of the negative pressure pump; preferably, the shore hardness of the umbrella valve is 40 ± 5 HD.
The valve seat (71) comprises a central hole (710) penetrating through the end face of the valve seat and first flow holes (711) uniformly distributed on the end face of the valve seat; the umbrella-shaped valve (72) comprises an umbrella handle (721), an umbrella knot (722) arranged in the middle of the umbrella handle (721) and an umbrella opening (723) arranged at the top of the umbrella knot, wherein the umbrella handle (721) and the umbrella knot (722) penetrate through the central hole (710) to be connected with the valve seat (71), the outer diameter of the umbrella knot (722) is larger than the aperture size of the central hole (710), the umbrella knot (722) and the central hole (710) are in an interference fit mode, and the umbrella opening (723) is located on the other side of the central hole (710) relative to the umbrella knot and can be unfolded and closed under the action of pressure.
The maximum external diameter size of the expansion of the umbrella opening (723) is smaller than the internal diameter size of the valve seat (71); the first flow hole (711) of the umbrella valve can be completely covered after the umbrella opening (723) is unfolded; the top surface of the umbrella opening (723) faces the direction of the negative pressure pump; preferably, the number of the flow holes is even.
The umbrella opening is contacted with the bottom of the valve seat of the umbrella valve in a closed state and covers all umbrella valve flow holes, and is separated from the bottom of the valve seat of the umbrella valve in an unfolded state and exposes all umbrella valve flow holes.
As another embodiment, the structure of the one-way valve is a combined structure of a diaphragm and a valve seat.
The second one-way valve (2) comprises a diaphragm (22) and a valve seat formed by a front valve seat (21) and a rear valve seat (23), and the diaphragm (22), the rear valve seat (23) and the front valve seat (21) are connected in an interference fit assembly mode respectively.
The bottom of the front valve seat (21) is provided with an exhaust hole (210), the center of the end surface of the bottom of the rear valve seat (23) is provided with a convex part facing the direction of the front valve seat, and the end surface of the rear valve seat is provided with second flow holes (230) which are uniformly distributed.
The diaphragm is in a cylindrical shape with one end sealed; further preferably, the Shore hardness is 30. + -. 5HD and the wall thickness is 0.15. + -. 0.05 mm.
The diaphragm (22) is positioned in an inner space where the front valve seat (21) is connected with the rear valve seat (23) and can move under the action of pressure; the inner diameter of the rear valve seat (23) is smaller than the outer diameter of the front valve seat (21), the inner diameter of the diaphragm sheet (22) is smaller than the outer diameter of the front valve seat (21) and smaller than the inner diameter of the rear valve seat (23), the front valve seat (21) is far away from the direction of the negative pressure pump than the valve seat (23), and a clearance space is reserved between the interference fit part of the rear valve seat (23) and the front valve seat (21) and the protruding part of the rear valve seat (23).
When the diaphragm sheet contacts the bottom of the front valve seat, gas can be prevented from entering the diaphragm valve flow hole through the vent hole, and when the diaphragm sheet contacts the bottom of the rear valve seat, gas entering from the vent hole can pass through the diaphragm valve flow hole.
Negative pressure pump (5), including negative pressure pump air inlet (51) and negative pressure pump gas outlet (52), negative pressure pump gas outlet (52) are connected with duckbill valve (6). The setting of duckbill valve can make the system gas leakage volume further reduce.
Has the advantages that: compared with the prior art, the utility model has the following advantages:
(1) the air tightness of the medical vacuum negative pressure machine is improved. The utility model is applied to the design of the one-way valve system of the medical vacuum negative pressure machine, and particularly can obviously improve the air tightness by utilizing the interference fit mode of the assembly size of the components and the design of the uniform distribution of the micro flow holes.
(2) The air pressure through the check valve is uniform. The uniform air pressure after passing through the one-way valve is ensured by arranging the flow holes which are uniformly distributed, and arranging the composite structure of the diaphragm and the valve seat and the composite structure of the umbrella-shaped valve and the valve seat.
(3) The battery has strong cruising ability. After the one-way valve system is used, the air tightness is improved, the air suction frequency of the negative pressure pump is reduced, meanwhile, the time for maintaining the expected negative pressure environment is increased, the power consumption is reduced, and the service life of the battery is further prolonged.
(4) The noise is reduced. Because the one-way valve system has compact structure and reasonable design, the air pumping state of the negative pressure pump can quickly reach the preset negative pressure upper limit value, and simultaneously a certain negative pressure environment is kept for a long time, thereby reducing the integral working noise of the negative pressure machine.
(5) The assembly is simple, and the cost is reduced. The one-way valve system structure adopts a component assembly type combination mode, reduces the complexity of integral assembly, is also favorable for the division and cooperation of production lines, improves the assembly efficiency and reduces the production cost.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the present invention.
FIG. 2 is a schematic diagram showing the effect of the elastic characteristics of the silica gel material of the present invention.
FIG. 3 is a schematic view of the umbrella valve assembly of the present invention.
Figure 4 schematic view of the working principle of the umbrella valve of the present invention (closed state).
FIG. 5 is a schematic view of the working principle of the umbrella valve of the present invention (open state)
Fig. 6 is a schematic structural diagram of embodiment 2 of the present invention.
Figure 7 is a schematic view of the diaphragm valve assembly of the present invention.
Figure 8 is a schematic view of the operating principle of the diaphragm valve of the present invention (open state).
FIG. 9 is a schematic view of the operating principle of the diaphragm valve of the present invention (closed state)
Detailed Description
The present invention will be further described with reference to the following examples in order to provide a thorough understanding of the present invention.
Example 1
As shown in fig. 1, the one-way valve system is a combination of an umbrella valve 72 and a valve seat 71 applied to a medical vacuum negative pressure machine, and is designed to open a gas passage from a luer adapter 1 to a negative pressure pump outlet 52 through a three-way nozzle 3 only when a negative pressure pump 5 is operated.
As shown in fig. 1 and 3, the umbrella valve 72 and the umbrella valve seat 71 are combined into an umbrella valve 7 structure, and the umbrella valve 7 and the three-way air faucet 3 are assembled in an interference fit manner. The outer diameter of the valve seat 71 of the umbrella valve is larger than the inner diameter of the three-way air tap 3, and the size difference of the two is within the range of 0.4 +/-0.1 mm; the umbrella valve 7 is embedded into the three-way air nozzle 3 and is close to the air outlet 33 of the three-way air nozzle, so that the air tightness of the contact area of the umbrella valve 7 and the three-way air nozzle 3 can be ensured to be good.
As shown in fig. 1, the luer adapter 1, the three-way air tap 3 and the air pressure sensor 4 are assembled in an interference fit manner. The connector limiting port 12 is formed by tightly fixing the Ruhr adapter 1 in the negative pressure machine shell, and simultaneously ensuring the concentricity of the three-way air tap 3 and the Ruhr adapter 1; the luer adapter air outlet 13 is made of plastic PP material, the outer diameter size of the luer adapter air outlet is larger than the inner diameter size of the three-way air nozzle air inlet 31, and the size difference of the luer adapter air outlet and the three-way air nozzle air inlet is within the range of 0.5 +/-0.1 mm; the inner diameter of the three-way air nozzle collecting port 32 is smaller than the outer diameter of the air pressure sensor collecting end 41, and the size difference of the two is within the range of 0.3 +/-0.1 mm; the inner diameter of the air outlet 33 of the three-way air nozzle is smaller than the outer diameter of the air inlet 51 of the negative pressure pump, and the size difference of the two is within the range of 0.8 +/-0.1 mm.
As shown in fig. 2, O-shaped silicone rings are tightly fitted between the luer adapter 1 and the three-way air faucet 3, between the air pressure sensor 4 and the three-way air faucet 3, and between the three-way air faucet 3 and the negative pressure pump 5. A contact area A of the luer adapter air outlet 13 and the three-way air nozzle air inlet 31 is provided, and three O-shaped silica gel rings are arranged on the inner side of the three-way air nozzle air inlet 31, so that the contact area is fully sealed from an external air leakage channel; in a contact area C of the three-way air nozzle acquisition port 32 and the air pressure sensor acquisition end 41, three O-shaped silica gel rings are arranged in the inner side area of the three-way air nozzle acquisition port 32, so that the air pressure in the contact area can be fully acquired and sealed; in a contact area C between the three-way air nozzle air outlet 33 and the negative pressure pump air inlet 51, three O-shaped silica gel rings are arranged in the area inside the three-way air nozzle air outlet 33, so that the gas in the contact area is prevented from leaking outwards.
As shown in FIG. 3, the combined assembly structure of the umbrella valve 72 and the umbrella valve seat 71 is an interference fit. The umbrella valve 72 passes through the central hole 710 of the umbrella valve seat 71 through the umbrella knot 722 on the umbrella handle 721, the umbrella knot 722 is of a circular structure and is integrally formed with the umbrella valve by a silica gel mold, the outer diameter of the umbrella knot 722 is larger than the aperture of the central hole 710 of the umbrella valve seat 71, and the difference of the two sizes is within the range of 1 +/-0.1 mm. The interference fit of the umbrella knot 722 with the umbrella valve seat 71 here ensures that the umbrella valve 721 is concentric and tightly fixed with the central bore 710.
Further, as shown in FIG. 3, in order to open and close the umbrella opening smoothly and rapidly under the air pressure, it is required that the maximum outer diameter of the opening 723 is smaller than the inner diameter of the valve seat 71, and the difference between the two dimensions is controlled within 0.3. + -. 0.05 mm.
As shown in fig. 4 and 5, the umbrella valve 7 formed by the umbrella valve 72 and the umbrella valve seat 71 has a one-way air flow. When the pressure P2 on the umbrella mouth 723 side of the umbrella valve 72 is greater than the pressure P1 on the umbrella top end, the umbrella valve 72 starts to open, so that the edge of the umbrella mouth 723 is separated from the end face of the umbrella valve seat 71, a gap is generated between the umbrella valve seat 71 and the umbrella valve 72, and thus air is enabled to pass through the umbrella valve first flow hole 711 to form air circulation; when the pressure P2 on one side of the umbrella mouth 723 is smaller than the pressure P1 on one end of the umbrella top, the umbrella mouth 723 deforms and contracts, the umbrella mouth 723 is tightly attached to the umbrella valve seat 71, the umbrella valve first flow hole 711 on the end face of the umbrella valve seat 71 is tightly covered, and the air can not pass through the umbrella valve seat 71, so that the purpose of the one-way valve is achieved.
As shown in FIG. 3, the valve seats 71 of the umbrella valves are all arranged on the end surfacesThe first flow holes 711 are uniformly distributed so that the umbrella valve 72 can be stably opened and closed under pressure. The end face of the umbrella valve seat 71 is provided with a plurality of umbrella valve first flow holes 711 which are uniformly distributed in a plane of 360 degrees, the number of the umbrella valve first flow holes 711 can be designed into a scheme of 4, 8 and 12, preferably 4 or 8, and the umbrella valve 72 is subjected to the same air pressure in all directions during the air circulation process. For example, when the number is 4, the inner diameter may be
Example 2
As shown in fig. 6, basically the same as embodiment 1 except for the difference of the one-way valve structure, the one-way valve structure system is applied to the medical vacuum negative pressure machine and is formed by combining the diaphragm 22, the front valve seat 21 and the rear valve seat 23, and the system is designed to open the gas passage from the luer adapter 1 to the negative pressure pump air outlet 52 through the three-way nozzle 3 only when the negative pressure pump 5 is operated.
As shown in fig. 7, the combination of the diaphragm 22, the rear valve seat 23 and the front valve seat 21 is assembled as an interference fit. The front valve seat 21 and the rear valve seat 23 form a cylindrical area with the diameter of 6.5mm and the depth of 0.8mm, a diaphragm 22 is embedded in the cylindrical area, the diaphragm 22 is in a cylindrical shape with the height of 0.5mm and the inner diameter of 6.5mm, the inner diameter of the rear valve seat 23 is larger than the outer diameter of the front valve seat 21, and the difference between the two sizes is within the range of 0.5 +/-0.1 mm; the inner diameter of the diaphragm 22 is larger than the outer diameter of the front valve seat 21, and the size difference of the two is within the range of 0.2 +/-0.05 mm; the outer diameter of the diaphragm valve 2 is larger than the inner diameter of the three-way air tap 3, and the size difference between the two is 0.8 +/-0.1 mm; due to the size design, the two are assembled in an interference fit mode, and the air tightness is guaranteed.
As shown in fig. 8 and 9, the diaphragm valve 2 in which the diaphragm sheet 22, the front valve seat 21, and the rear valve seat 23 are combined has a function of unidirectional air flow. When the pressure on the front end surface of the diaphragm 22, that is, P3, is greater than the pressure on the rear end surface, that is, P4, the diaphragm 22 moves toward the rear valve seat 23 under the action of the pressure, so that a gap is formed between the front valve seat 21 and the inner side of the three-way air tap 3, and air and the second diaphragm flow hole 230 on the end surface of the rear valve seat 23 form air circulation, and meanwhile, the structural design of a cylindrical protrusion 231 with the diameter of 2.0 +/-0.05 mm and the height of 1.0mm is designed at the center of the end surface of the rear valve seat 23, so that the diaphragm 22 cannot block the second diaphragm flow hole 230; when the pressure P3 on the front end face of the diaphragm 22 is smaller than the pressure P4 on the rear end face, the diaphragm 22 and the front valve seat 21 are assembled in an interference fit manner, so that the diaphragm 22 moves toward the front valve seat 21 under the action of pressure and tightly covers the exhaust hole 210, and the air cannot pass through, thereby achieving the function of a one-way valve.
As shown in fig. 7, the flow holes are uniformly formed in the end surface of the rear valve seat 23 to allow the diaphragm 22 to stably move under pressure. On the end face of the rear valve seat 23, there are provided a plurality of diaphragm valve second flow holes 230 uniformly distributed in a plane of 360 °, the number of which may be 3, 6 or 9, preferably 3 or 6, and the function of the second flow holes is to make the diaphragm 22 subject to the same air pressure in each direction during the air circulation process. For example, when the number is 3, the inner diameter may be
Further, as shown in fig. 6, in order to make the diaphragm move smoothly and rapidly in the process of receiving air pressure, the diaphragm needs to be made of silica gel or rubber, and has a cylindrical structure design with shore hardness of 30HD, thickness of 0.15 ± 0.05mm, height of 0.5mm, and diameter of 6.5 mm.
As shown in fig. 1 and fig. 6, in order to better control the gas leakage of the system, a duckbill valve 6 may be installed at the negative pressure pump outlet 52 of the negative pressure pump 5, and the duckbill valve 6 is also a one-way valve structure and is combined with the negative pressure pump outlet 52 to be in normal gas communication when the negative pressure pump 5 works; when the negative pressure pump 5 does not work, the duckbill valve 6 will block the air passage of the negative pressure pump air outlet 52 communicated with the outside. Meanwhile, the combined structure of the duckbill valve 6 and the negative pressure pump air outlet 52 can increase the power consumption of the negative pressure pump 5.
Claims (17)
1. The utility model provides a check valve system for medical vacuum negative pressure machine which characterized in that, includes check valve, adapter, air cock and negative pressure pump, places the air cock in the check valve, and wherein, the air outlet of adapter passes through interference fit mode be assembled between with the air inlet of air cock, the air inlet of negative pressure pump and the air outlet of air cock.
2. The check valve system of claim 1, characterized in that, the system comprises an air pressure sensor, the air faucet is a three-way air faucet, and comprises a three-way air faucet air inlet (31), a three-way air faucet collecting port (32) and a three-way air faucet air outlet (33), wherein, the valve seat of the check valve is assembled with the air faucet in an interference fit assembly mode, and the three-way air faucet collecting port (32) is assembled with the air pressure sensor (4) in an interference fit assembly mode.
3. The check valve system of any one of claims 1-2, wherein the adapter, the check valve, the negative pressure pump, the air pressure sensor, and the air faucet at the interference fit portion of the air faucet are made of elastic materials; the shape is round; the adapter and the one-way valve are made of elastic materials.
4. The check valve system of any one of claims 1-2, wherein the adapter, the check valve, the negative pressure pump, the air pressure sensor and the air faucet at the interference fit part of the air faucet are made of silica gel or rubber; the adapter and the check valve are made of plastic PP materials.
5. The one-way valve system of any of claims 1-2, wherein any interference fit portion inside the air tap is provided with a protruding sealing gasket; the sealing washer and the air tap are of an integral structure and are made of elastic materials; the shape of the sealing gasket is consistent with the shape of the interference fit part of the air faucet.
6. The check valve system according to any of claims 1-2, wherein a protruding sealing gasket is provided at any interference fit portion inside the air faucet except for an interference fit portion where a valve seat of the check valve is connected with the air faucet; the sealing washer and the air tap are of an integral structure and are made of silica gel or rubber; the shape of the sealing gasket is consistent with that of the interference fit part of the air tap and is O-shaped; the number of the sealing gaskets is 3 or 5.
7. The one-way valve system of any of claims 1-2, wherein an inner diameter dimension of the inlet air of the air nipple is smaller than an outer diameter dimension of the outlet port of the adapter; the inner diameter of the air outlet of the air tap is smaller than the outer diameter of the air inlet of the negative pressure pump; the inner diameter size of the air tap acquisition port is smaller than the outer diameter size of the air pressure sensor acquisition port; the outside diameter of the one-way valve seat is larger than the inside diameter of the air inlet and the air outlet of the air tap.
8. A one-way valve system according to any of claims 1-2, wherein the adapter is a luer adapter (1) comprising a luer adapter (11), a adapter limiting port (12) and a luer adapter outlet port (13), the adapter limiting port (12) being disposed intermediate the luer adapter (11) and the luer adapter outlet port (13).
9. The check valve system of claim 1, wherein the valve seat of the check valve has an end surface provided with evenly distributed flow holes, and an outer edge of the flow holes is spaced from an inner wall of the end surface of the valve seat by a distance not smaller than a distance between an edge of the shutter and the inner wall of the end surface of the valve seat.
10. The one-way valve system of any one of claims 1-2, wherein the valve and valve seat of the one-way valve are assembled in an interference fit.
11. The check valve system according to any of claims 1-2, characterized in that the check valve is a first check valve (7) having a structure of a combination of an umbrella-shaped valve (72) and a valve seat (71), the umbrella-shaped valve (72) facing one end of the negative pressure pump; the shore hardness of the umbrella valve (72) is 40 +/-5 HD.
12. The one-way valve system of claim 11, wherein the valve seat (71) includes a central bore (710) through the valve seat end face and first flow orifices (711) evenly distributed in the valve seat end face; the umbrella-shaped valve (72) comprises an umbrella handle (721), an umbrella knot (722) arranged in the middle of the umbrella handle (721) and an umbrella opening (723) arranged at the top of the umbrella knot, wherein the umbrella handle (721) and the umbrella knot (722) penetrate through the central hole (710) to be connected with the valve seat (71), the outer diameter of the umbrella knot (722) is larger than the aperture size of the central hole (710), the umbrella knot (722) and the central hole (710) are in an interference fit mode, and the umbrella opening (723) is located on the other side of the central hole (710) relative to the umbrella knot and can be unfolded and closed under the action of pressure.
13. The one-way valve system of claim 12, wherein the expanded maximum outer diameter dimension of the umbrella port (723) is less than the inner diameter dimension of the valve seat (71); the first flow hole (711) of the umbrella valve can be completely covered after the umbrella opening (723) is unfolded; the top surface of the umbrella opening (723) faces the direction of the negative pressure pump; the number of the first flow holes (711) is even.
14. The check valve system of any of claims 1-2, wherein the structure of the check valve is a diaphragm and valve seat combination.
15. One-way valve system according to any of claims 1-2, characterized in that the one-way valve is a second one-way valve (2) comprising a diaphragm (22), a valve seat formed by a front valve seat (21) and a rear valve seat (23), the diaphragm (22), the rear valve seat (23) and the front valve seat (21) being connected by means of an interference fit assembly, respectively.
16. The check valve system of claim 15, wherein the bottom of the front valve seat (21) is provided with an exhaust hole (210), the center of the bottom end surface of the rear valve seat (23) is provided with a convex portion toward the front valve seat, and the end surface is provided with second flow holes (230) which are uniformly distributed; the diaphragm (22) is in a cylindrical shape with one end sealed; the Shore hardness of the diaphragm (22) is 30 +/-5 HD, and the wall thickness is 0.15 +/-0.05 mm.
17. One-way valve system according to claim 16, wherein the diaphragm (22) is located in an inner space where the front valve seat (21) and the rear valve seat (23) are connected, and is movable under pressure; the inner diameter of the rear valve seat (23) is smaller than the outer diameter of the front valve seat (21), the inner diameter of the diaphragm sheet (22) is smaller than the outer diameter of the front valve seat (21) and smaller than the inner diameter of the rear valve seat (23), the front valve seat (21) is far away from the direction of the negative pressure pump than the rear valve seat (23), and a clearance space is reserved between the interference fit part of the rear valve seat (23) and the front valve seat (21) and the protruding part of the rear valve seat (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121819181.2U CN215950492U (en) | 2021-08-05 | 2021-08-05 | One-way valve system for medical vacuum negative pressure machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121819181.2U CN215950492U (en) | 2021-08-05 | 2021-08-05 | One-way valve system for medical vacuum negative pressure machine |
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| CN215950492U true CN215950492U (en) | 2022-03-04 |
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| CN202121819181.2U Active CN215950492U (en) | 2021-08-05 | 2021-08-05 | One-way valve system for medical vacuum negative pressure machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113521527A (en) * | 2021-08-05 | 2021-10-22 | 江苏苏中药业集团医疗器械有限公司 | One-way valve system for medical vacuum negative pressure machine |
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2021
- 2021-08-05 CN CN202121819181.2U patent/CN215950492U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113521527A (en) * | 2021-08-05 | 2021-10-22 | 江苏苏中药业集团医疗器械有限公司 | One-way valve system for medical vacuum negative pressure machine |
| CN113521527B (en) * | 2021-08-05 | 2023-08-25 | 江苏苏中药业集团医疗器械有限公司 | One-way valve system for medical vacuum negative pressure machine |
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