CN221723465U

CN221723465U - Medical check valve

Info

Publication number: CN221723465U
Application number: CN202420476415.5U
Authority: CN
Inventors: 余巧生
Original assignee: Individual
Current assignee: Individual
Priority date: 2024-03-12
Filing date: 2024-03-12
Publication date: 2024-09-17
Anticipated expiration: 2034-03-12

Abstract

The utility model relates to a medical one-way valve. To enhance fluid passage and sealing performance. The inner cavity of the middle thick pipe expansion joint is provided with front and rear hollow brackets axially matched with a central shaft in a sliding way along the axis at intervals, a front pipe expansion seat is arranged in front of the rear hollow bracket, a valve plate buckled with the front end of the front pipe expansion seat is fixedly sleeved on the central shaft in a sealing way, an elastic sealing piece buckled with the front end of the front pipe expansion seat in a sealing way is arranged behind the valve plate, and a supporting spring is sleeved outside the central shaft between the valve plate and the front hollow brackets. The elastic sealing piece is a silica gel elastic membrane. The front hollowed-out support is provided with a front convex hollowed-out barrel-shaped seat for accommodating the front part of the supporting spring. The sealing device has the advantages of good fluid passing performance, high sealing quality and easy self-opening and closing depending on the fluid.

Description

Medical check valve

Technical Field

The utility model relates to a one-way valve for throttling fluid, in particular to a medical one-way valve.

Background

The prior one-way valve with the document number of CN219774920U comprises a base, wherein a one-way valve inner insert is detachably fixed in the base, a screw cap is connected to the one-way valve inner insert in a threaded manner, and an elastic valve component is arranged in the one-way valve inner insert; the elastic valve assembly comprises a thrust piece, a spring and a sealing gasket, wherein the sealing gasket is detachably fixed at one end of the thrust piece, a channel is formed in the check valve inner insert, a conical opening is formed in the edge of one end of the channel, a limiting step is formed in the conical opening, the sealing gasket is abutted to the cambered surface of the conical opening, the thrust piece is arranged in the channel, the spring is installed at the outer side of the thrust piece, one end of the spring is abutted to the limiting step, and the other end of the spring supports the head of the thrust piece. The thrust piece comprises a thrust rod, a cross core and a conical table, wherein the cross core is fixed at one end of the thrust rod, the conical table is fixed at one end of the thrust rod away from the cross core, and the outer diameter of the conical table is smaller than the inner diameter of the spring and the conical opening. The bottom of the cross core is provided with a notch for installing the spring, and one end of the spring is clamped in the notch. The outer wall of the conical table is provided with a sealing groove for the sealing gasket to be embedded, and the sealing gasket is embedded in the sealing groove to wrap one end of the conical table. The sealing gasket is dish-shaped. The outer wall of the check valve insert is provided with a plurality of limiting rings used for preventing rotation and falling off, and the inner wall of the base is provided with a plurality of limiting grooves corresponding to the limiting rings one by one. The top fixedly connected with bulge loop of the interior inserts of check valve, install annular sealing pad on the bulge loop, screw cap threaded connection is in when the interior inserts of check valve, annular sealing pad is located the screw cap with between the interior inserts of check valve. The top of screw cap has seted up the recess, fixedly connected with handle in the recess. However, the method has the defects in the aspects of fluid trafficability and sealing quality effect in medical use, and particularly has the defects in the aspects of outputting and inputting artificial nuclear medicine with higher requirements on fluxion and sealing quality effect to an activity well and in ventilation control of a split charging hot chamber.

Disclosure of utility model

The utility model aims to overcome the defects in the prior art and provides a medical one-way valve. The fluid passing performance and the sealing quality effect are obviously improved.

The medical one-way valve is characterized in that front and rear hollow brackets axially matched with a central shaft in a sliding mode are arranged in the inner cavity of the middle thick pipe expansion joint at intervals along the axis, a front pipe extension seat is arranged in front of the rear hollow bracket in the inner cavity of the middle thick pipe expansion joint, a valve plate buckled with the front end of the front pipe extension seat is fixedly sleeved on the central shaft in a sealing mode, an elastic sealing piece buckled with the front end of the front pipe extension seat in a sealing mode is arranged behind the valve plate, and a supporting spring is sleeved outside the central shaft between the valve plate and the front hollow bracket. The front and rear hollow brackets can be used for supporting the central shaft in a reliable and durable axial sliding fit manner. The inner cavity of the middle-thick type pipe expansion joint is provided with the front extension pipe seat and the valve plate of the front and rear hollow brackets, the elastic sealing piece of the valve plate, the central shaft and the supporting spring of the central shaft, so that better fluid trafficability can be provided compared with the pipe joint with the same diameter and the narrow diameter when the valve plate and the elastic sealing piece of the valve plate leave the front extension pipe seat, and the flow-through property can be easily not lower than that of a pipeline connected with the valve plate in series. Because the front extending tube seat and the valve plate are pressed and sealed under the action of the spring through the elastic sealing piece, the sealing contact surface is narrow, the sealing is easy, the sealing degree is high, and the sealing failure is extremely difficult to occur. Therefore, the medical check valve has the advantages of good fluid trafficability, high sealing quality, easy self-opening and closing depending on the fluid, and being particularly suitable for the output and input of artificial nuclear medicine to an activity well and the self-opening and closing control of a sub-packaging hot chamber negative pressure ventilation pipeline, namely, when negative wind pressure or positive wind pressure disappears, the pipeline can be automatically and tightly closed by depending on the medical check valve, and the radioactive pollution air leakage is strictly prevented.

As optimization, the elastic sealing piece is a silica gel elastic membrane. Compared with other elastic materials, the silica gel elastic membrane is not easy to hang dirt, has good elasticity and is more durable, and is particularly suitable for being pressed and sealed with the front end of the front tube seat.

As optimization, the elastic sealing piece is in a circular ring piece shape, and a residual gap is not easy to exist between the elastic sealing piece and the valve plate. The inner ring part of the annular sheet-shaped elastic sealing sheet is tightly fastened with the valve sheet through an annular pressing plate and annular distributed fastening nails thereof, and compared with the sticking device, the annular sheet-shaped elastic sealing sheet does not influence or pollute the circulated medicine. And the fixing flow of the inner ring part is better than that of the outer ring part.

As an optimization, the front hollow bracket is provided with a front convex hollow barrel-shaped seat for accommodating the front part of the supporting spring. Therefore, on the premise of not increasing the spacing between the front hollow bracket and the rear hollow bracket, the length of the spring can be increased, so that the sealing and expanding performance under the support of the spring is obviously optimized, and the reliability and the operability are better.

As optimization, the front convex hollowed barrel-shaped seat is in a straight barrel shape or a conical barrel shape with a front part thinner than a rear part thicker than the front part, and compared with the straight barrel shape, the front end can better restrict the front end of the supporting spring, so that the sealing reliability is improved, and the inner cavity at the middle and rear parts of the hollowed cone barrel which is not contacted with the supporting spring is more beneficial to circulation.

As optimization, the front extension tube seat is a trapezoid tube wall type front extension tube seat with a narrow front and a wide rear, and reliable sealing is realized by easy pressing. Is an annular blade type front extending pipe seat with thin front and thick rear, and is easier to press and realize reliable sealing. The trapezium is isosceles or right trapezoid. The right trapezoid occupies less circulation space than the isosceles trapezoid, and the small low-angle isosceles trapezoid has a certain auxiliary supporting function of the elastic sealing piece.

As optimization, the rear hollow support is provided with a front boss for sleeving the base part of the supporting spring forwards, and the supporting spring has good stability when being stretched, so that the buckling sealing performance is improved.

As optimization, the middle thick type pipe expansion joint is formed by sealing and buckling a front pipe expansion cap joint provided with a front hollow bracket and a rear pipe expansion seat joint provided with a rear hollow bracket and a front pipe expansion seat. Thus, the manufacturing, the assembling, the disassembling and the maintaining are convenient.

As optimization, the front pipe expansion cap joint is a rear inward stepped rear stretching mouth horn joint with thin front and thick rear, and the rear inward step in the middle of the rear stretching mouth horn joint is provided with the front hollow bracket, so that the front pipe expansion cap joint is easy to be integrally injection molded; the rear pipe expanding seat joint is an inner convex annular forward extending mouth horn joint with thick front part and thin rear part, the inner convex ring in the middle of the forward extending mouth horn joint is internally provided with the rear hollow support, and the inner convex ring in the middle of the forward extending mouth horn joint is forwards provided with the forward extending seat. Thus, the plastic is easy to be integrally injection molded. It is also advantageous to provide a more spacious circulation space for the fluid.

As optimization, the front pipe expansion cap joint is a rear horn-shaped pipe expansion with a front straight pipe opening extending backwards, the rear end of the rear horn-shaped pipe expansion is connected with an abduction ring table of a front hollow bracket in an extending way, and the periphery of the abduction ring table extends backwards to be used for being in sealing and buckling with the rear pipe expansion seat joint; the rear pipe expanding seat joint is a front horn-shaped pipe expanding seat with a rear straight pipe opening extending forwards, the front horn-shaped pipe expanding seat joint extends forwards to be used for being in sealing engagement with the front pipe expanding seat joint, an inner convex ring is arranged in the middle of an inner cavity of the front horn-shaped pipe expanding seat joint, the inner periphery of the inner convex ring is provided with the rear hollow bracket, and the inner convex ring is arranged forwards on the front pipe expanding seat. The inner and outer sleeve joint between the rear end of the backward tube seat and the front end of the forward tube seat is sealed by a silica gel sealing ring. The rear end of the backward tube seat is in threaded connection with the front end of the forward tube seat, and a silica gel sealing ring is pressed between the front end of the inner sleeve seat and the inner annular table of the outer sleeve seat, so that the assembly, disassembly and maintenance are convenient, and reliable sealing connection and butt joint can be ensured. The abduction ring table of the front hollow support is connected with the rear end of the backward horn-shaped expanding tube in an extending mode, so that the fluid convolution space is increased, and the circulation is guaranteed. The middle part of the inner cavity of the forward horn-shaped pipe expanding is provided with an inner convex ring, the inner periphery of the inner convex ring is provided with the rear hollow bracket, and the inner convex ring is forwards provided with the front pipe expanding seat, so that the buckling tightness is ensured, the fluid convolution space is increased, and the circulation is ensured. The outer periphery of the abduction ring table extends backwards to be used for being in sealing engagement with the backward pipe expanding seat joint and the forward pipe expanding horn extends forwards to be used for being in sealing engagement with the forward pipe expanding seat joint, so that firm sealing and butt joint are facilitated, and the circulation space is enlarged. The front straight pipe orifice and the rear straight pipe orifice are respectively used for extending and connecting an upstream circulation pipeline and a downstream circulation pipeline, in particular to a medical pipeline, the extending and connecting can be directly and externally sleeved, or can be realized through internal thread screwing and simultaneously the butt joint ring surface is sealed through a silica gel sealing ring.

The air-tight one-way valve consists of negative pressure suction and discharge pipelines, hollow air holes with cross sections, constant pressure springs with sealing cross sections, silica gel elastic diaphragms, annular blade sealing cross sections, concentric undamped vertical orientation devices, a shell and the like. The typical application is that before the split-charging nuclear medicine is automatically filled, the split-charging nuclear medicine needs to enter an automatic packaging hot chamber activity meter well for detecting the medicine activity. The airtight suction check valve is installed to activity meter well entrance (negative pressure suction tuber pipe), namely this novel medical check valve, and airtight discharge check valve is installed to activity meter well exit (negative pressure discharge tuber pipe), namely this novel medical check valve. Thus, the separation of the split-charging nuclear medicine from the outside can be ensured, and the split-charging nuclear medicine has no radiation and no pollution. When the partial shipment nuclear medicine carries out the activity detection in having the partial shipment ventilation protection cabinet workstation of radiation protection function, realize airtight check valve through automatic lifting device and positive negative atmospheric pressure control constant pressure spring's deformation, also this novel medical check valve, carry out the nuclear medicine bottle that the partial shipment is good and get into the activity meter well and fall the bottle discharge function.

After the technical scheme is adopted, the medical one-way valve has the advantages of good fluid trafficability, high sealing quality and easy self-opening and closing depending on the fluid, and is particularly suitable for the output and input of artificial nuclear medicine to an activity well and the self-opening and closing control of a sub-packaging hot chamber negative pressure ventilation pipeline, namely, when negative wind pressure or positive wind pressure disappears, the pipeline can be automatically and tightly closed by the medical one-way valve, and the air leakage caused by radioactive pollution is strictly prevented.

Drawings

Fig. 1 is a schematic view of the structure of the medical check valve of the present utility model in an airtight state. Fig. 2 is a schematic view of the structure of the medical check valve of the present utility model in a state of airtight discharge.

Detailed Description

As shown in the figure, the medical check valve is characterized in that a front hollow support 21 and a rear hollow support 31 which axially slide and match a central shaft 1 are arranged in the inner cavity of a medium-thick pipe section at intervals along the axis, a front pipe extension seat 30 is arranged in front of the rear hollow support 31, a valve plate 10 buckled with the front end of the front pipe extension seat 30 is fixedly sleeved on the central shaft 1 in a sealing manner, an elastic sealing sheet 11 buckled with the front end of the front pipe extension seat 30 is arranged behind the valve plate 10, and a supporting spring 4 is sleeved outside the central shaft 1 between the valve plate 10 and the front hollow support 21. The front and rear hollow brackets can be used for supporting the central shaft in a reliable and durable axial sliding fit manner. The inner cavity of the middle-thick type pipe expansion joint is provided with the front extension pipe seat and the valve plate of the front and rear hollow brackets, the elastic sealing piece of the valve plate, the central shaft and the supporting spring of the central shaft, so that better fluid trafficability can be provided compared with the pipe joint with the same diameter and the narrow diameter when the valve plate and the elastic sealing piece of the valve plate leave the front extension pipe seat, and the flow-through property can be easily not lower than that of a pipeline connected with the valve plate in series. Because the front extending tube seat and the valve plate are pressed and sealed under the action of the spring through the elastic sealing piece, the sealing contact surface is narrow, the sealing is easy, the sealing degree is high, and the sealing failure is extremely difficult to occur. Therefore, the medical check valve has the advantages of good fluid trafficability, high sealing quality, easy self-opening and closing depending on the fluid, and being particularly suitable for the output and input of artificial nuclear medicine to an activity well and the self-opening and closing control of a sub-packaging hot chamber negative pressure ventilation pipeline, namely, when negative wind pressure or positive wind pressure disappears, the pipeline can be automatically and tightly closed by depending on the medical check valve, and the radioactive pollution air leakage is strictly prevented.

Specifically, the elastic sealing piece 11 is a silica gel elastic membrane. More specifically, the elastic sealing piece 11 is in a circular ring shape. The inner ring part of the annular sheet-shaped elastic sealing sheet 11 is tightly fastened with the valve sheet 10 through an annular pressing plate 12 and annular fastening nails which are uniformly distributed.

Specifically, the front hollow bracket 21 is provided with a front convex hollow barrel-shaped seat 20 for accommodating the front part of the supporting spring 4, and the front convex hollow barrel-shaped seat 20 is a conical barrel shape with thin front and thick rear, and can also be a straight barrel shape.

Specifically, the front extension tube seat 30 is a trapezoid pipe wall type front extension tube seat 30 with a narrow front and a wide rear. More specifically, the front thin and rear thick annular blade type front extending tube seat. Preferably the trapezoid is an isosceles or right trapezoid. More preferably a right trapezoid.

Specifically, the rear hollow bracket 31 is provided forward with a front boss 13 for sheathing the base of the supporting spring.

The middle thick type pipe expansion joint is formed by sealing and buckling a front pipe expansion cap joint 2 provided with a front hollow bracket and a rear pipe expansion joint 3 provided with a rear hollow bracket and a front pipe expansion seat. More specifically, the front pipe expansion cap section 2 is a rear inward stepped rear stretching mouth horn section with thin front and thick rear, and the rear inward step in the middle of the rear stretching mouth horn section is provided with the front hollow bracket 21; the rear pipe expanding seat section 3 is an inner convex annular front stretching mouth horn section with thick front and thin rear, the inner periphery of an inner convex ring 32 in the middle of the front stretching mouth horn section is provided with the rear hollow bracket 31, and the inner convex ring 32 in the middle of the front stretching mouth horn section is provided with the front stretching seat 30 forward.

More specifically, the front pipe expansion cap section 2 is a rear horn-shaped pipe expansion with a front straight pipe opening extending backwards, the rear end of the rear horn-shaped pipe expansion is connected with an abduction ring table of a front hollow bracket in an extending way, and the periphery of the abduction ring table extends backwards to be used for being in sealing and buckling with the rear pipe expansion seat section 3; the rear pipe expanding seat section 3 is a front horn-shaped pipe expanding seat with a rear straight pipe opening extending forwards, the front horn-shaped pipe expanding seat extends forwards to be used for being in sealing engagement with the front pipe expanding cap section 2, the middle part of the inner cavity of the front horn-shaped pipe expanding seat is provided with an inner convex ring 32, the inner periphery of the inner convex ring 32 is provided with a rear hollow bracket, and the inner convex ring 32 is forwards provided with the front pipe expanding seat 30. The inner and outer sleeve joint between the rear end of the backward tube seat and the front end of the forward tube seat is sealed by a silica gel sealing ring. The rear end of the backward tube seat is in threaded connection with the front end of the forward tube seat, and a silica gel sealing ring is arranged between the front end of the inner sleeve seat and the inner annular table of the outer sleeve seat in a pressing mode. The front straight pipe orifice and the rear straight pipe orifice are respectively used for extending and connecting an upstream circulating pipeline 5 and a downstream circulating pipeline 5, in particular to a medical pipeline, and the extending and connecting can be directly sleeved outside or can be realized through internal thread screw connection, and simultaneously, the butt joint ring surface is sealed through a silica gel sealing ring.

The air-tight one-way valve consists of negative pressure suction and discharge pipelines, hollow air holes with cross sections, constant pressure springs with sealing cross sections, silica gel elastic diaphragms, annular blade sealing cross sections, concentric undamped vertical orientation devices, a shell and the like. The typical application is that before the split-charging nuclear medicine is automatically filled, the split-charging nuclear medicine needs to enter an automatic packaging hot chamber activity meter well for detecting the medicine activity. The airtight suction check valve is installed at the inlet of the activity meter well (negative pressure suction air pipe), namely the medical check valve of the novel figure 1, and the airtight discharge check valve is installed at the outlet of the activity meter well (negative pressure discharge air pipe), namely the medical check valve of the novel figure 2. Thus, the separation of the split-charging nuclear medicine from the outside can be ensured, and the split-charging nuclear medicine has no radiation and no pollution. When the partial shipment nuclear medicine carries out the activity detection in having the partial shipment ventilation protection cabinet workstation of radiation protection function, realize airtight check valve through automatic lifting device and positive negative atmospheric pressure control constant pressure spring's deformation, also this novel medical check valve, carry out the nuclear medicine bottle that the partial shipment is good and get into the activity meter well and fall the bottle discharge function.

In a word, the medical unidirectional valve has the advantages of good fluid trafficability, high sealing quality, easy self-opening and closing depending on fluid, and being particularly suitable for the output and input of artificial nuclear medicine to an activity well and the self-opening and closing control of a sub-packaging hot chamber negative pressure ventilation pipeline, namely, when negative wind pressure or positive wind pressure disappears, the medical unidirectional valve can be used for automatically and tightly closing the pipeline, and the air leakage caused by radioactive pollution is strictly prevented.

Claims

1. A medical one-way valve is characterized in that front and rear hollow brackets axially matched with a central shaft in a sliding mode are arranged in an inner cavity of a middle-thick pipe expansion joint at intervals along an axis, a front pipe extension seat is arranged in front of a rear hollow bracket in the inner cavity of the middle-thick pipe expansion joint, a valve plate buckled with the front end of the front pipe extension seat is fixedly sleeved on the central shaft in a sealing mode, an elastic sealing piece buckled with the front end of the front pipe extension seat is arranged behind the valve plate, and a supporting spring is sleeved outside the central shaft between the valve plate and the front hollow brackets.

2. The medical check valve according to claim 1, wherein the elastic sealing sheet is a silicone elastic membrane.

3. The medical check valve according to any of claims 1-2, wherein the resilient sealing sheet is in the form of a circular ring sheet.

4. The medical check valve according to claim 1, wherein the front hollow bracket is provided forward with a front convex hollow barrel-shaped seat for receiving the front part of the support spring.

5. The medical check valve according to claim 4, wherein the front convex hollowed-out barrel-shaped seat is in a straight barrel shape or a conical barrel shape with a thin front part and a thick rear part.

6. The medical check valve according to claim 1, wherein said stem seat is a trapezoidal tube wall type stem seat having a narrow front and a wide rear.

7. The medical check valve according to claim 1, wherein the rear hollowed-out bracket is provided forward with a front boss for externally fitting a support spring base.

8. The medical check valve according to claim 1, wherein the middle-thick pipe expansion joint is formed by sealing and buckling a front pipe expansion cap joint provided with a front hollow bracket and a rear pipe expansion seat joint provided with a rear hollow bracket and a front pipe expansion seat.

9. The medical check valve according to claim 8, wherein the front expansion pipe cap section is a rear inward stepped rear-extension horn section with a thin front and a thick rear, and the rear inward step in the middle of the rear-extension horn section is provided with the front hollow bracket; the rear pipe expanding seat joint is an inner convex annular forward extending mouth horn joint with thick front part and thin rear part, the inner convex ring in the middle of the forward extending mouth horn joint is internally provided with the rear hollow support, and the inner convex ring in the middle of the forward extending mouth horn joint is forwards provided with the forward extending seat.

10. The medical check valve according to claim 8, wherein the front tube expansion cap section is a rear horn-shaped tube expansion with a front straight tube opening extending backwards, the rear end of the rear horn-shaped tube expansion is connected with an abduction ring table of a front hollow bracket in an extending way, and the periphery of the abduction ring table extends backwards to be used for sealing and buckling with the rear tube expansion seat section; the rear pipe expanding seat joint is a front horn-shaped pipe expanding seat with a rear straight pipe opening extending forwards, the front horn-shaped pipe expanding seat joint extends forwards to be used for being in sealing engagement with the front pipe expanding seat joint, an inner convex ring is arranged in the middle of an inner cavity of the front horn-shaped pipe expanding seat joint, the inner periphery of the inner convex ring is provided with the rear hollow bracket, and the inner convex ring is arranged forwards on the front pipe expanding seat.