CN218510259U - Micro-pressure safety valve - Google Patents
Micro-pressure safety valve Download PDFInfo
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- CN218510259U CN218510259U CN202221765286.9U CN202221765286U CN218510259U CN 218510259 U CN218510259 U CN 218510259U CN 202221765286 U CN202221765286 U CN 202221765286U CN 218510259 U CN218510259 U CN 218510259U
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Abstract
The utility model provides a micro-pressure safety valve, which comprises a valve body, a valve cover, an end cover, a valve component and a pressure membrane assembly part, wherein the valve body is connected with the valve cover to form a first cavity, the pressure membrane assembly part and the valve body form a second cavity and form a third cavity with the end cover, and an opening is arranged between the first cavity and the second cavity; the valve assembly is positioned in the first cavity and the second cavity, penetrates through the opening and is fixedly connected with the film pressing assembly part; the valve cover is provided with a first air inlet, the end cover is provided with a second air inlet, the valve body is provided with an air outlet, the first air inlet and the second air inlet are connected with the same air source, and the air outlet is communicated with the atmosphere; the valve component can open or seal the opening under the action of the air inlet pressure of the first air inlet and the air inlet pressure of the second air inlet; the valve component can balance the acting force generated in the first chamber, and the air pressure of the air outlet is controlled within a safe range under the condition of overlarge air pressure, so that the rubber sleeve of the cervical endoscope is prevented from being damaged by the overlarge air pressure.
Description
Technical Field
The utility model discloses medical equipment technical field, concretely relates to minute-pressure relief valve.
Background
The cervical endoscope uses a micro-pressure air source, and the micro-pressure air source means that the air pressure of the air source is not more than 30kPa. At present, a balloon is used as a gas input source and supplies gas to a cervical endoscope through a gas supply pipeline. However, currently, air is supplied by manually pressing the balloon, the output air pressure of the balloon is increased along with the increase of the pressing times, the output air pressure of the balloon may exceed the pressure safety range, and the potential safety hazard of the explosion of the rubber sleeve of the cervical endoscope exists.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the above-mentioned not enough that exists among the prior art, provide a minute-pressure relief valve.
The utility model provides a micro-pressure safety valve, which comprises a valve body, a valve cover, an end cover, a valve component and a pressure membrane assembly component, wherein the valve body is connected with the valve cover to form a first cavity;
the film pressing assembly is arranged in an accommodating space formed by the valve body and the end cover, and the film pressing assembly and the valve body form a second chamber and form a third chamber together with the end cover;
the valve cover is provided with a first air inlet for introducing air into the first chamber, the end cover is provided with a second air inlet for introducing air into the third chamber, and the valve body is provided with an air outlet communicated with the atmosphere; the first air inlet and the second air inlet are connected with the same air source;
the first chamber with have the opening between the second chamber, the valve assembly is located first chamber with in the second chamber, run through the opening and with squeeze film assembly spare fixed connection for open or seal under the effect of the inlet pressure of first air inlet and the inlet pressure of second air inlet the opening.
In some embodiments, the valve assembly comprises a stem, a seal, a first resilient member, and a second resilient member, the seal encasing a sidewall of the stem, the seal abutting the opening with the valve assembly sealing the opening;
the first elastic component is accommodated in the second chamber, the first end of the first elastic component is fixedly connected with the valve body, and the second end of the first elastic component is fixedly connected with the film pressing assembly part;
the second elastic component is arranged on the side wall of the first part of the valve rod, the first part of the valve rod is located in the first cavity, the first end of the second elastic component is fixedly connected with the valve cover, and the second end of the second elastic component is fixedly connected with the valve rod.
In some embodiments, the seal is a seal packing comprising a sealing surface for sealing the opening, the sealing surface being a ramped surface that slopes toward the valve stem in a direction toward the squeeze film assembly.
In some embodiments, the cross-sectional area of the first portion of the valve stem is equal to the projected area of the sealing surface of the seal in the plane of the opening.
In some embodiments, the valve assembly further comprises a first seal disposed around a sidewall of the first portion of the valve stem and between the valve stem and the bonnet.
In some embodiments, the first resilient member is a conical spring and a cross-sectional area of a first end of the first resilient member is less than a cross-sectional area of a second end of the first resilient member.
In some embodiments, the lamination assembly includes a support sheet, a first film attached to a first edge of the support sheet and a first sidewall of the end cap, respectively, and a second film attached to a second edge of the support sheet and a second sidewall of the end cap, respectively;
the support sheet is made of rigid materials, and the valve rod is fixedly connected with one side, adjacent to the second chamber, of the support sheet.
In some embodiments, the support plate is disposed opposite to the second air inlet, and the valve stem is fixedly connected to a central position of the support plate.
In some embodiments, the surface of the support sheet is provided with a reinforcing structure.
In some embodiments, the reinforcing structure is a rib protruding from a surface of the support sheet, and the rib is disposed on a side of the support sheet adjacent to the third chamber.
The utility model discloses following beneficial effect has:
the utility model provides a micro-pressure safety valve, including valve body, valve gap, end cover, valve member and pressure membrane assembly spare, the valve body is connected with the valve gap and is formed first cavity, and pressure membrane assembly spare forms the second cavity with the valve body to form the third cavity with the end cover, have the opening between first cavity and the second cavity; the valve assembly is positioned in the first cavity and the second cavity, penetrates through the opening and is fixedly connected with the film pressing assembly part; the valve cover is provided with a first air inlet, the end cover is provided with a second air inlet, the valve body is provided with an air outlet, the first air inlet and the second air inlet are connected with the same air source, and the air outlet is communicated with the atmosphere; the valve component can open or seal the opening under the action of the air inlet pressure of the first air inlet and the air inlet pressure of the second air inlet; in the process of air inlet to the micro-pressure safety valve, the valve assembly can balance the acting force generated in the first cavity, the air outlet pressure of the micro-pressure safety valve is dynamically adjusted, and the valve assembly opens the opening to discharge the air in the first cavity from the air outlet through the second cavity under the condition of overlarge air inlet pressure, so that the air outlet pressure is controlled within a safety range, and the rubber sleeve of the cervical endoscope is prevented from being damaged due to overlarge air pressure.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a schematic structural view of a micro-pressure safety valve provided in an embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The utility model provides a minute-pressure relief valve, as shown in fig. 1, including valve body 1, valve gap 2, end cover 3, valve member and pressure membrane built-up member, valve body 1 is connected with valve gap 2 and is formed first cavity 101. The film pressing assembly is arranged in the accommodating space formed by the valve body 1 and the end cover 3, and the film pressing assembly and the valve body 1 form a second chamber 102 and form a third chamber 103 with the end cover 3. The valve cover 2 is provided with a first air inlet 4 for introducing air into the first chamber 101, the end cover 3 is provided with a second air inlet 5 for introducing air into the third chamber 103, the valve body 1 is provided with an air outlet 6 communicated with the atmosphere, and the first air inlet 4 and the second air inlet 5 are connected with the same air source. An opening 7 is formed between the first chamber 101 and the second chamber 102, and a valve assembly is positioned in the first chamber 101 and the second chamber 102, penetrates through the opening 7 and is fixedly connected with the film pressing assembly part, and is used for opening or sealing the opening 7 under the action of the air inlet pressure of the first air inlet 4 and the air inlet pressure of the second air inlet 5.
The valve body 1 plays a supporting and connecting role, and the valve cover 2 and the end cover 3 are installed on the valve body 1. The squeeze film assembly divides the accommodating space formed by the valve body 1 and the end cover 3 into a second chamber 102 and a third chamber 103, wherein the second chamber 102 is communicated with the outside air. The squeeze film assembly can amplify the gas pressure entering the micro-pressure safety valve from the second gas inlet 5 and convert the gas pressure into an upward force, the force drives the valve rod assembly to move upwards, and the volume of the third chamber 103 is changed in a telescopic mode due to the fact that the squeeze film assembly moves upwards. Accordingly, the upward movement of the valve assembly opens the opening 7 between the first chamber 101 and the second chamber 102. In the process that the valve component moves upwards to open the opening 7, gas can enter the first chamber 101 through the first gas inlet 4 and enter the second chamber 102 from the first chamber 101 through the opening 7, and because the second chamber 102 is communicated with the atmosphere, the gas flows out from the gas outlet 6, and under the condition that the gas inlet pressure is overlarge, the gas outlet pressure can be controlled within a safety range, so that the rubber sleeve of the endoscope is prevented from being damaged due to the overlarge gas outlet pressure. Under the condition that the air inlet pressure is normal, the acting forces formed by the gas entering the first chamber 101 from the first air inlet 4 cancel each other out, so that a balance structure is formed, and the dynamic balance adjustment of the output pressure is realized.
It should be noted that the micro-pressure safety valve of the present invention may further have a gas outlet (not shown in the drawings), and the gas outlet is connected to a device using a micro-pressure gas source, which may be, for example, a cervical endoscope. The air outlet may be in communication with the first chamber 101 or, alternatively, with the third chamber 103.
The utility model discloses a minute-pressure relief valve can install on gas supply line, under this kind of circumstances, utilizes three way connection to connect three way connection respectively with the first air inlet 4, second air inlet 5 and the gas outlet of minute-pressure relief valve, is connected with gas supply line through three way connection. The utility model discloses a minute-pressure relief valve also can install on pressure vessel, under this condition, is connected the second air inlet 5 and the pressure vessel main part of minute-pressure relief valve, and it is all can to be connected the first air inlet 4 and the pressure vessel main part of minute-pressure relief valve or gas supply line.
The embodiment of the utility model provides a minute-pressure relief valve includes valve body 1, valve gap 2, end cover 3, valve member and pressure membrane assembly spare, and valve body 1 is connected with valve gap 2 and is formed first cavity 101, and pressure membrane assembly spare forms second cavity 102 with valve body 1 to form third cavity 103 with end cover 3, has opening 7 between first cavity 101 and the second cavity 102; the valve components are positioned in the first chamber 101 and the second chamber 102, penetrate through the opening 7 and are fixedly connected with the film pressing assembly; the valve cover 2 is provided with a first air inlet 4, the end cover 3 is provided with a second air inlet 5, the valve body 1 is provided with an air outlet 6, the first air inlet 4 and the second air inlet 5 are connected with the same air source, and the air outlet 6 is communicated with the atmosphere; the valve assembly is capable of opening or sealing the opening 7 under the action of the inlet pressure of the first inlet port 4 and the inlet pressure of the second inlet port 5; in the process of air inlet to the micro-pressure safety valve, the valve assembly can balance the acting force generated in the first chamber 101, the air outlet pressure of the micro-pressure safety valve is dynamically adjusted, the valve assembly can open the opening 7 to discharge the gas in the first chamber 101 from the air outlet under the condition of overlarge air inlet pressure, the micro-pressure safety valve can control the air outlet pressure within a safety range, and the rubber sleeve of the cervical endoscope is prevented from being damaged due to overlarge air pressure.
In some embodiments, the valve assembly comprises a valve stem 8, a seal 9, a first resilient member 10 and a second resilient member 11, the seal 9 covering the side wall of the valve stem 8, the seal 9 abutting the opening 7 in case the valve assembly seals the opening 7.
The first elastic component 10 is accommodated in the second chamber 102, and a first end of the first elastic component 10 is fixedly connected with the valve body 1, and a second end of the first elastic component 10 is fixedly connected with the film pressing assembly.
The second elastic component 11 is arranged on the side wall of the first part of the valve rod 8, the first part of the valve rod 8 is positioned in the first chamber 101, the first end of the second elastic component 11 is fixedly connected with the valve cover 2, and the second end of the second elastic component 11 is fixedly connected with the valve rod 8.
The valve rod 8 is a metal piece, and the sealing element 9 is a sealing filler, and can form an integral part with the valve rod 8 in an encapsulating manner, wherein the integral part is called a valve and is used for controlling the opening or closing of the opening 7.
In the embodiment of the present disclosure, the first elastic member 10 and the second elastic member 11 are both springs, and the second elastic member 11 is sleeved around the first portion of the valve rod 8.
In some embodiments, seal 9 includes a sealing surface for sealing opening 7, the sealing surface being a ramped surface that slopes toward valve stem 8 in a direction toward the lamination assembly. That is, in fig. 1, the sealing surface of the seal 9 is constricted inwardly in the direction of the opening 7.
In some embodiments, the cross-sectional area of the first portion of the valve stem 8 is equal to the projected area of the sealing surface of the seal 9 in the plane of the opening 7. In this way, in the first chamber 101, the first intake port 4 generates an upward force F1 on the first portion of the valve stem 8 and a downward component force F2 on the sealing surface of the seal 9, and when the cross-sectional area of the first portion of the valve stem 8 is equal to the projected area of the sealing surface on the plane of the opening 7, F1 and F2 cancel each other out, so that the valve assembly can be in a hovering state and form a balanced structure.
In some embodiments, the valve assembly further comprises a first gasket 12, the first gasket 12 surrounding a sidewall of the first portion of the valve stem 8 and being positioned between the valve stem 8 and the bonnet 2.
In some embodiments, the valve assembly further comprises a second sealing ring 13, and the second sealing ring 13 is used for sealing the valve body 1 and the valve cover 2. The first seal ring 12 and the second seal ring 13 may be both O-ring seals.
In some embodiments, the first resilient member 10 is a conical spring, and the cross-sectional area of the first end of the first resilient member 10 is smaller than the cross-sectional area of the second end of the first resilient member 10. That is, the conical spring is smaller at the end adjacent to the valve body 1 and larger at the end adjacent to the film pressing assembly, so that the conical spring is better in stability after being stressed compared with a common cylindrical spring.
In some embodiments, the lamination assembly includes a support sheet 14, a first film 15, and a second film 16, the first film 15 being attached to a first edge of the support sheet 14 and a first sidewall of the end cap 3, respectively, and the second film 16 being attached to a second edge of the support sheet 14 and a second sidewall of the end cap 3, respectively.
The support sheet 14 is made of a rigid material, and the valve stem 8 is fixedly connected with one side of the support sheet 14 adjacent to the second chamber 102. Specifically, the material of the support sheet 14 may be plastic, and a surface of the support sheet 14 adjacent to the second chamber 102 is a flat surface, and the flat surface is provided with a mounting seat, and the valve rod 8 is fixed in the mounting seat.
In some embodiments, the support plate 14 is disposed opposite to the second air inlet 5, and the valve rod 8 is fixedly connected to the center of the support plate 14.
Because the valve rod 8 is a vertical component, the valve rod 8 is arranged at the center of the supporting sheet 14, the supporting sheet 14 can be prevented from deflecting under the conditions of vortex, uneven local stress and the like in the gas, so that the mechanical direction is changed, the valve rod 8 can vertically lift, and the opening 7 can be normally opened or closed.
In some embodiments, the surface of the supporting sheet 14 is provided with a reinforcing structure 17, the reinforcing structure 17 can increase the strength of the supporting sheet 14 and improve the reliability, and the reinforcing structure 17 can be a reinforcing plate or a reinforcing rib.
In the embodiment of the present invention, the reinforcing structure is a reinforcing rib protruding from the surface of the supporting sheet 14, and the reinforcing rib is disposed on one side of the supporting sheet 14 adjacent to the third chamber 103. The provision of the reinforcing ribs on the side of the support sheet 14 adjacent to the third chamber 103 prevents the support sheet 14 from contacting the bottom of the end cap 3 completely to form a seal and thereby affect the force applied to the support sheet 14.
The utility model discloses minute-pressure relief valve's working process as follows:
the air enters the third chamber 103 from the second air inlet 5, an upward force is generated on the supporting sheet 14 under the action of the air pressure, the force overcomes the pre-compression force of the first elastic component 10, the supporting sheet 14 and the valve rod 8 are pushed to move upwards, when the valve rod 8 moves upwards, the first elastic component 10 is further compressed to generate larger tension, and when the generated tension is balanced with the force generated on the supporting sheet 14, the valve rod 8 stops moving upwards, and is in a hovering state. During the upward movement of the valve rod 8, the sealing surface of the sealing element 9 is disengaged from the opening 7, the gas supply channel is opened, and the gas entering the first chamber 101 from the first gas inlet 4 enters the second chamber 102 through the opening 7 and flows to the external environment through the gas outlet 6, thereby releasing the excessive gas pressure in the micro-pressure safety valve.
The pressure in the first chamber 101 and the third chamber 103 is gradually reduced along with the continuous outflow of the gas in the micro-pressure safety valve, when the pressure is not enough to balance the tension of the first elastic component 10, the supporting sheet 14 starts to move downwards, at this time, the first elastic component 10 starts to relax, the tension thereof is also reduced, the valve rod 8 follows the supporting sheet 14 to move downwards under the action of the second elastic component 11 until the sealing surface of the sealing member 9 is driven to abut against the opening 7 again, the gas supply channel is closed again to cut off the outward discharge of the gas, the valve rod 8 stops moving, and the balance is achieved again at this moment.
The embodiment of the utility model provides a to the problem that current cervical endoscope does not have the safeguard measure who prevents the rubber sleeve blasting, provide a minute-pressure relief valve, install it between air supply and cervical endoscope, can avoid atmospheric pressure too big damage cervical endoscope's rubber sleeve within the atmospheric pressure control of carrying to cervical endoscope within safety range.
It is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. The micro-pressure safety valve is characterized by comprising a valve body, a valve cover, an end cover, a valve component and a film pressing assembly component, wherein the valve body is connected with the valve cover to form a first cavity;
the film pressing assembly is arranged in an accommodating space formed by the valve body and the end cover, and the film pressing assembly and the valve body form a second chamber and form a third chamber with the end cover;
the valve cover is provided with a first air inlet for introducing air into the first chamber, the end cover is provided with a second air inlet for introducing air into the third chamber, and the valve body is provided with an air outlet communicated with the atmosphere; the first air inlet and the second air inlet are connected with the same air source;
the first cavity with have the opening between the second cavity, the valve assembly is located first cavity with in the second cavity, run through the opening and with squeeze film assembly spare fixed connection for open or seal under the effect of the inlet pressure of first air inlet and the inlet pressure of second air inlet the opening.
2. The micro-pressure safety valve according to claim 1, wherein the valve assembly comprises a stem, a sealing member, a first elastic member, and a second elastic member, the sealing member covering a side wall of the stem, the sealing member abutting against the opening with the valve assembly sealing the opening;
the first elastic component is accommodated in the second chamber, the first end of the first elastic component is fixedly connected with the valve body, and the second end of the first elastic component is fixedly connected with the film pressing assembly part;
the second elastic component is arranged on the side wall of the first part of the valve rod, the first part of the valve rod is located in the first cavity, the first end of the second elastic component is fixedly connected with the valve cover, and the second end of the second elastic component is fixedly connected with the valve rod.
3. The micro-pressure safety valve of claim 2, wherein the seal is a seal packing comprising a sealing surface for sealing the opening, the sealing surface being a ramp that slopes toward the valve stem in a direction toward the lamination assembly.
4. The micro-pressure safety valve of claim 3, wherein the cross-sectional area of the first portion of the valve stem is equal to the projected area of the sealing surface of the seal in the plane of the opening.
5. The micro-pressure safety valve of claim 2, wherein the valve assembly further comprises a first sealing ring disposed around a sidewall of the first portion of the valve stem and between the valve stem and the bonnet.
6. The micro-pressure relief valve of claim 2, wherein the first resilient member is a conical spring and a cross-sectional area of a first end of the first resilient member is smaller than a cross-sectional area of a second end of the first resilient member.
7. A micro-pressure safety valve according to any of claims 2-6, wherein the squeeze film assembly comprises a support sheet, a first film and a second film, the first film being attached to a first edge of the support sheet and a first side wall of the end cap, respectively, and the second film being attached to a second edge of the support sheet and a second side wall of the end cap, respectively;
the support sheet is made of rigid materials, and the valve rod is fixedly connected with one side, adjacent to the second chamber, of the support sheet.
8. The micro-pressure safety valve according to claim 7, wherein the support plate is disposed opposite to the second air inlet, and the valve stem is fixedly connected to a central position of the support plate.
9. The micro-pressure safety valve according to claim 7, wherein the surface of the support sheet is provided with a reinforcing structure.
10. The micro-pressure safety valve of claim 9, wherein the reinforcing structure is a rib protruding from a surface of the support sheet, and the rib is disposed on a side of the support sheet adjacent to the third chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221765286.9U CN218510259U (en) | 2022-07-08 | 2022-07-08 | Micro-pressure safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221765286.9U CN218510259U (en) | 2022-07-08 | 2022-07-08 | Micro-pressure safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218510259U true CN218510259U (en) | 2023-02-21 |
Family
ID=85206676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221765286.9U Active CN218510259U (en) | 2022-07-08 | 2022-07-08 | Micro-pressure safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218510259U (en) |
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2022
- 2022-07-08 CN CN202221765286.9U patent/CN218510259U/en active Active
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