CN112524304B - Pressure control valve for closed drainage device based on dynamic hole numerical control pressure - Google Patents
Pressure control valve for closed drainage device based on dynamic hole numerical control pressure Download PDFInfo
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- CN112524304B CN112524304B CN202011380735.3A CN202011380735A CN112524304B CN 112524304 B CN112524304 B CN 112524304B CN 202011380735 A CN202011380735 A CN 202011380735A CN 112524304 B CN112524304 B CN 112524304B
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- 239000012528 membrane Substances 0.000 claims abstract description 54
- 238000013459 approach Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 7
- 230000002411 adverse Effects 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000015572 biosynthetic process Effects 0.000 description 1
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- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000000416 exudates and transudate Anatomy 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
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- A61F13/05—
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/1262—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being spring loaded
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3379—Masses, volumes, levels of fluids in reservoirs, flow rates
Abstract
The invention relates to a pressure control valve for a closed drainage device based on dynamic hole numerical control pressure, which belongs to the technical field of pressure control valves and comprises a pressure control valve body, wherein a cavity structure is arranged in the pressure control valve body, an air inlet joint and an air outlet joint which are communicated with the cavity are respectively arranged on two sides of the pressure control valve body, a pressure control pipe with a closed upper end and an open lower end is vertically arranged in the center of the top of the cavity of the pressure control valve body, a plurality of pressure control pipe holes are distributed in parallel on the side wall of the pressure control pipe, an elastic membrane is attached to the top of the cavity of the pressure control valve body, the periphery of the elastic membrane is fixed on the pressure control valve body, the lower end of the pressure control pipe penetrates through a central hole of the elastic membrane, the periphery of the central hole of the elastic membrane is closely attached to the upper end of the outer side wall of the pressure control pipe under a flat normal state, and the top of the pressure control valve body is provided with pressure control holes, the invention can play a role of dynamically regulating negative pressure so that the negative pressure at the input end of a negative pressure closed drainage device is in a balanced and stable negative pressure value, effectively avoiding the unstable negative pressure source from generating adverse effect on the drainage working state.
Description
Technical Field
The invention relates to the technical field of pressure control valves, in particular to a pressure control valve for a closed drainage device based on dynamic hole numerical control.
Background
The negative pressure closed drainage technology VSD is a brand new treatment method that a medical sponge dressing with a drainage tube is used for covering or filling the wound surface with skin and soft tissue defects, a biological semipermeable membrane is used for sealing the wound surface to form a closed space, and finally the drainage tube is connected with a negative pressure source to promote the wound surface to heal through controllable negative pressure.
The method is characterized in that: the controllable negative pressure promotes the increase of blood flow and the synthesis of protein, promotes the growth of granulation and accelerates the healing of wound surfaces; meanwhile, power is provided for omnibearing active drainage. The sealing of the biological semipermeable membrane isolates the infection chance of the wound surface contacting with the external environment. The omnibearing drainage changes the traditional point or local drainage into the surface drainage, and ensures that necrotic tissues and exudates at each position of the wound surface can be sucked out at any time.
The current negative pressure seals drainage technique when the treatment, negative pressure source's direct output negative pressure value probably has the undulant condition of not equidimension, and human wound tissue is generally pressed close to negative pressure seals drainage device's drainage end, if produce the instantaneous low value negative pressure that hangs down under the unstable negative pressure source accident situation, then produce harmful effects to drainage operating condition easily, consequently, need to design a steady voltage valve that can be applied to on the medical negative pressure equipment urgent, be used for medical equipment negative pressure source input, play the effect of stable negative pressure.
Based on the above, the invention designs a pressure control valve for a closed drainage device based on dynamic hole numerical control pressure, so as to solve the problems.
Disclosure of Invention
The invention aims to provide a pressure control valve for a closed drainage device based on dynamic hole numerical control pressure, and the pressure control valve is used for solving the technical problem.
In order to realize the purpose, the invention provides the following technical scheme: a pressure control valve for a closed drainage device based on dynamic hole numerical control pressure comprises a pressure control valve body, wherein a cavity is formed in the pressure control valve body, an air inlet connector and an air outlet connector which are communicated with the cavity are respectively arranged on two sides of the pressure control valve body, a pressure control pipe with a closed upper end and an open lower end is vertically arranged in the center of the top of the cavity of the pressure control valve body, a plurality of pressure control pipe holes are formed in the side wall of the pressure control pipe in parallel distribution, an elastic membrane is attached to the top of the cavity of the pressure control valve body, the periphery of the elastic membrane is fixed on the pressure control valve body, the lower end of the pressure control pipe penetrates through a central hole of the elastic membrane, the periphery of the central hole of the elastic membrane is in close fit with the upper end of the outer side wall of the pressure control pipe in a flat normal state, and a pressure control hole is formed in the top of the pressure control valve body.
Preferably, the pressure control valve body comprises a valve body with an open top and a valve cover covering the top of the valve body, and the periphery of the elastic membrane is clamped and fixed between the abutting surfaces of the valve body and the valve cover.
Preferably, the valve cover is detachably mounted on the valve body through a plurality of screws distributed in a circumferential array.
Preferably, the upper end of the pressure control pipe is fixedly sleeved with a threaded column, and the threaded column is connected with the top of the pressure control valve body through a threaded structure.
Preferably, the upper end of the threaded column is integrally provided with a rotating handle, and the rotating handle is positioned on the outer side of the top of the pressure control valve body.
Preferably, a reset pressure spring is arranged in the center of the inner cavity of the pressure control valve body, the upper end of the reset pressure spring is sleeved outside the pressure control pipe, and the top of the reset pressure spring is abutted against the bottom surface of the elastic membrane.
Preferably, the middle part of the bottom surface of the inner cavity of the pressure control valve body is provided with a pressure spring limiting pipe column, and the lower end of the reset pressure spring is sleeved outside the pressure spring limiting pipe column.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a pressure control valve for a closed drainage device based on dynamic hole numerical control pressure, which mainly comprises a pressure control valve body, a conical column, an elastic membrane and a pressure control hole, wherein after two sides of the pressure control valve body are connected in series into a negative pressure pipe of the negative pressure closed drainage device through an air inlet joint and an air outlet joint, the top surface of the elastic membrane is communicated with atmospheric pressure through the pressure control hole, and the bottom surface of the elastic membrane is communicated with a negative pressure cavity of the negative pressure closed drainage device through the negative pressure pipe, when the negative pressure of the negative pressure cavity of the negative pressure closed drainage device is increased, the middle part of the elastic membrane is pressed downwards by external atmospheric pressure, so that the external atmospheric pressure is communicated with an inner cavity of the pressure control valve through the pressure control hole and a pressure control pipe hole positioned above the elastic membrane, external air flow is supplemented into the pressure control valve body, the negative pressure of the input end of the negative pressure closed drainage device is compensated, the negative pressure of the input end of the negative pressure closed drainage device approaches a constant value along with the external air flow, and the elastic membrane rebounds to a flat state, in addition, each pressure control pipe hole is positioned below the elastic membrane and isolated from the external atmospheric pressure, so that the negative pressure dynamic regulation effect is realized, the negative pressure at the input end of the negative pressure closed drainage device is in a balanced and stable negative pressure value, and the adverse effect of an unstable negative pressure source on the drainage working state is effectively avoided.
The pressure control valve body is arranged into the valve body and the valve cover which are detachably connected, and the valve cover is detachably arranged on the valve body through a plurality of screws distributed in a circumferential array, so that the pressure control valve is easy to install, replace and maintain.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is an external structural view of an embodiment of the present invention;
FIG. 2 is a cross-sectional view of an embodiment of the present invention;
FIG. 3 is a cross-sectional view of an embodiment of a pressure control state of the present invention;
FIG. 4 is a schematic view of a pressure control tube according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1-pressure control valve body, 11-valve body, 12-valve cover, 2-air inlet joint, 3-air outlet joint, 4-pressure control pipe, 41-pressure control pipe hole, 42-threaded column, 43-rotating handle, 5-elastic membrane, 6-pressure control hole, 7-screw, 8-reset pressure spring and 9-pressure spring limiting pipe column.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, a pressure control valve for a closed drainage device based on dynamic hole numerical control pressure comprises a pressure control valve body 1, a cavity is arranged in the pressure control valve body 1, an air inlet connector 2 and an air outlet connector 3 communicated with the cavity are respectively arranged on two sides of the pressure control valve body 1, the pressure control valve body 1 can be connected in series with a negative pressure pipe of a negative pressure closed drainage device through the air inlet connector 2 and the air outlet connector 3, a pressure control pipe 4 with a closed upper end and an open lower end is vertically arranged in the center of the top of the cavity of the pressure control valve body 1, a plurality of pressure control pipe holes 41 are distributed in parallel on the side wall of the pressure control pipe 4, an elastic membrane 5 is attached to the top of the cavity of the pressure control valve body 1, the elastic membrane 5 is preferably made of a material with good air tightness and elasticity, the periphery of the elastic membrane 5 is fixed on the pressure control valve body 1, the lower end of the pressure control pipe 4 penetrates through a central hole of the elastic membrane 5, the periphery of the elastic membrane 5 is kept in a closed fit with the upper end of the outer side wall of the pressure control pipe 4 in a flat normal state, the top of the pressure control valve body 1 is provided with a pressure control hole 6, when the negative pressure of a negative pressure cavity of the negative pressure closed drainage device is increased, the middle part of the elastic membrane is pressed downwards by external atmospheric pressure, so that the external atmospheric pressure is communicated with the inner cavity of the pressure control valve through the pressure control hole 6 and a pressure control pipe hole 41 positioned above the elastic membrane 5, external air flow is supplemented into the pressure control valve body, and thus the negative pressure at the input end of the negative pressure closed drainage device is compensated, along with the supplement of the external air flow, the negative pressure at the input end of the negative pressure closed drainage device approaches a constant value, the elastic membrane rebounds to a flat state, and each pressure control pipe hole 41 is positioned below the elastic membrane 5 and is isolated from the external atmospheric pressure, so that the effect of dynamically regulating the negative pressure is achieved; moreover, due to the structural characteristics that the pressure control pipe holes 41 are distributed in an equidistant and parallel manner, the larger the negative pressure value is, the larger the sinking height of the elastic membrane 5 is, the more the pressure control pipe holes 41 are located above the elastic membrane 5 are, and the faster the pressure relief speed of the pressure control valve is.
Further, the valve body 1 is pressed in accuse includes the open valve body 11 in top and the valve gap 12 of closing cap in valve body 11 top, the circumference lateral wall upper end of valve body 11 is provided with the annular contact surface that is in radial plane, be used for increase and valve gap 12 bottom surface area of contact, promote the centre gripping stability, and the circumference outer edge of annular contact surface is provided with the annular end edge, be used for preliminary spacing valve gap 12 position, make things convenient for spacing valve gap 12 to aim at valve body 11 lid with one heart, and simultaneously, the elastic film 5 of centre gripping can act as sealed the pad between valve body 11 and the valve gap 12, ensure the leakproofness of whole accuse pressure valve body 1 cavity, the periphery centre gripping of elastic film 5 is fixed in between the face of supporting of valve body 11 and valve gap 12, realize dismantled and assembled fixed, and disassembled screw 7 detachably that valve gap 12 distributes through a plurality of circumference array installs on valve body 11, the later stage makes things convenient for the maintenance and the change of elastic film 5.
Furthermore, as shown in fig. 4, because the negative pressure values required to be input are different without the use of negative pressure devices of different models and specifications, the upper end of the pressure control pipe 4 is fixedly sleeved with the threaded column 42, the threaded column 42 is connected with the top of the pressure control valve body 1 through a threaded structure, and when the threaded column 42 is rotated, the pressure control pipe 4 can be controlled to steplessly move up and down, when the pressure control pipe 4 moves downwards for adjustment, part of the outer diameter of the threaded column 42 is larger than the central hole of the elastic membrane 5, and the elastic membrane 5 is driven to sink to a certain height, therefore, when the negative pressure value in the pressure control valve body 1 is increased to a greater extent before adjustment, another equal number of effective ventilation pressure control pipe holes 41 are positioned above the elastic membrane 5, so as to play a role in adjusting the pressure control valve to start a negative pressure compensation threshold value, i.e. the pressure control valve realizes a function of adjusting and stabilizing the pressure; the top of valve body 1 is pressed in accuse is the boss that valve gap 12's top was provided with the internal thread hole for the effective spiro union length of increase screw thread post 42 promotes the stability of pressure control pipe 4, reduces and rocks the displacement, screw thread post 42's upper end an organic whole is provided with changes 43, changes 43 and is located the top outside that the valve body 1 was pressed in the accuse, changes 43 be provided with and do benefit to more laborsaving rotation screw thread post 42 and pressure control pipe 4, and can more accurate control screw thread post 42 and pressure control pipe 4 rotation volume.
Furthermore, a reset pressure spring 8 is arranged in the center of an inner cavity of the pressure control valve body 1, the upper end of the reset pressure spring 8 is sleeved outside the pressure control pipe 4, the top of the reset pressure spring 8 is abutted against the bottom surface of the elastic membrane 5, after the elastic membrane 5 is acted by negative pressure, the elastic sinking of the reset pressure spring 8 is overcome, and the reset pressure spring 8 is in a contraction energy storage state; when the negative pressure value is stable, the reset pressure spring 8 rebounds by means of the elastic potential energy of the reset pressure spring to drive the elastic membrane 5 to rebound rapidly, so that the effect of assisting the elastic membrane 5 to reset is achieved, and the strain speed and the sensitivity of the pressure control valve for compensating and stabilizing pressure according to the negative pressure change frequency are improved; the middle part of the bottom surface of the inner cavity of the pressure control valve body 1 is provided with a pressure spring limiting tubular column 9, the lower end of the reset pressure spring 8 is sleeved on the outer side of the pressure spring limiting tubular column 9, the position of the reset pressure spring 8 is limited and fixed, and the reset pressure spring 8 is prevented from side slipping under the stress during installation and operation.
The working principle of the embodiment is as follows:
when in use, as shown in figure 2, after two sides of the pressure control valve body 1 are connected in series into the negative pressure pipe of the negative pressure closed drainage device through the air inlet connector 2 and the air outlet connector 3, because the top surface of the elastic membrane 5 is communicated with the atmospheric pressure through the pressure control hole 6, and the bottom surface is communicated with the negative pressure cavity of the negative pressure closed drainage device through the negative pressure pipe, when the negative pressure of the negative pressure cavity of the negative pressure closed drainage device is increased, as shown in figure 3, the external atmospheric pressure presses down the middle part of the elastic membrane, so that the external atmospheric pressure is communicated with the inner cavity of the pressure control valve through the pressure control hole 6 and the pressure control pipe hole 41 positioned above the elastic membrane 5, so that the external air flow is supplemented into the pressure control valve body, thereby compensating the negative pressure at the input end of the negative pressure closed drainage device, along with the supplement of the external air flow, the negative pressure at the input end of the negative pressure closed drainage device approaches a constant value, the elastic membrane rebounds to a flat state, and other pressure control pipe holes 41 are positioned below the elastic membrane 5, isolated with outside atmospheric pressure, consequently play negative pressure dynamic adjustment's effect, make the negative pressure seal drainage device's input negative pressure be in a balanced stable negative pressure value, effectively avoid unstable negative pressure source to produce harmful effects to drainage operating condition.
In the description of the invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "two ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the invention.
In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the terms in the invention is understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a seal drainage device and use accuse pressure valve based on numerical control of dynamic hole is pressed which characterized in that: the pressure control valve comprises a pressure control valve body (1), a cavity is arranged in the pressure control valve body (1), an air inlet connector (2) and an air outlet connector (3) which are communicated with the cavity are respectively arranged on two sides of the pressure control valve body (1), the pressure control valve body (1) is connected in series to a negative pressure pipe of a negative pressure closed drainage device through the air inlet connector (2) and the air outlet connector (3), a pressure control pipe (4) with a closed upper end and an open lower end is vertically arranged in the center of the top of the cavity of the pressure control valve body (1), a plurality of pressure control pipe holes (41) are distributed in parallel on the side wall of the pressure control pipe (4) along the axial direction of the pressure control pipe (4), an elastic membrane (5) is attached to the top of the cavity of the pressure control valve body (1), the periphery of the elastic membrane (5) is fixed on the pressure control valve body (1), and the lower end of the pressure control pipe (4) penetrates through a center hole of the elastic membrane (5), the elastic membrane (5) keeps the periphery of a central hole in a sealed fit with the upper end of the outer side wall of the pressure control pipe (4) in a flat normal state, a pressure control hole (6) is formed in the top of the pressure control valve body (1), the top surface of the elastic membrane (5) is communicated with external atmospheric pressure through the pressure control hole (6), when the negative pressure of a negative pressure cavity of the negative pressure closed drainage device is increased, the middle of the elastic membrane (5) is pressed down by the external atmospheric pressure, the external atmospheric pressure is communicated with an inner cavity of the pressure control valve through the pressure control hole (6) and a pressure control pipe hole (41) located above the elastic membrane (5), and after the negative pressure of an input end of the negative pressure closed drainage device approaches a constant value, the elastic membrane (5) rebounds to a flat state, and each pressure control pipe hole (41) is located below the elastic membrane (5) and isolated from the external atmospheric pressure.
2. The pressure control valve for the closed drainage device based on the dynamic hole numerical control pressure as claimed in claim 1, wherein: the pressure control valve body (1) comprises a valve body (11) with an open top and a valve cover (12) covered on the top of the valve body (11), and the periphery of the elastic membrane (5) is clamped and fixed between the abutting surfaces of the valve body (11) and the valve cover (12).
3. The pressure control valve for the closed drainage device based on the dynamic hole numerical control pressure as claimed in claim 2, wherein: the valve cover (12) is detachably arranged on the valve body (11) through a plurality of screws (7) distributed in a circumferential array.
4. The pressure control valve for the closed drainage device based on the dynamic hole numerical control pressure as claimed in claim 1, wherein: the upper end of the pressure control pipe (4) is fixedly sleeved with a threaded column (42), and the threaded column (42) is connected with the top of the pressure control valve body (1) through a threaded structure.
5. The pressure control valve for the closed drainage device based on the dynamic hole numerical control pressure as claimed in claim 4, wherein: the upper end of the threaded column (42) is integrally provided with a rotating handle (43), and the rotating handle (43) is positioned on the outer side of the top of the pressure control valve body (1).
6. The pressure control valve for the closed drainage device based on the dynamic hole numerical control pressure as claimed in claim 1, wherein: the pressure control valve is characterized in that a reset pressure spring (8) is arranged in the center of an inner cavity of the pressure control valve body (1), the upper end of the reset pressure spring (8) is sleeved on the outer side of the pressure control pipe (4), and the top of the reset pressure spring (8) is abutted to the bottom surface of the elastic membrane (5).
7. The pressure control valve for the closed drainage device based on the dynamic hole numerical control pressure as claimed in claim 6, wherein: the pressure control valve body (1) is characterized in that a pressure spring limiting pipe column (9) is arranged in the middle of the bottom surface of an inner cavity of the pressure control valve body, and the lower end of a reset pressure spring (8) is sleeved on the outer side of the pressure spring limiting pipe column (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011380735.3A CN112524304B (en) | 2020-11-30 | 2020-11-30 | Pressure control valve for closed drainage device based on dynamic hole numerical control pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011380735.3A CN112524304B (en) | 2020-11-30 | 2020-11-30 | Pressure control valve for closed drainage device based on dynamic hole numerical control pressure |
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| Publication Number | Publication Date |
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| CN112524304A CN112524304A (en) | 2021-03-19 |
| CN112524304B true CN112524304B (en) | 2022-05-24 |
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| CN202011380735.3A Active CN112524304B (en) | 2020-11-30 | 2020-11-30 | Pressure control valve for closed drainage device based on dynamic hole numerical control pressure |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2229020Y (en) * | 1995-07-06 | 1996-06-12 | 蒋万益 | Vacuum manostat capable of reducing idling exhaust pollution |
| FR2738362B1 (en) * | 1995-08-28 | 1998-01-23 | Herve Dalvy | GAS INSUFFLATOR |
| US7615036B2 (en) * | 2006-05-11 | 2009-11-10 | Kalypto Medical, Inc. | Device and method for wound therapy |
| CN102537440B (en) * | 2010-12-31 | 2015-11-25 | 深圳迈瑞生物医疗电子股份有限公司 | Vacuum overflow valve and sample analyser |
| CN203690211U (en) * | 2014-01-24 | 2014-07-02 | 浙江科博电器有限公司 | Novel pressure switch |
| US11207458B2 (en) * | 2015-02-02 | 2021-12-28 | Kci Licensing, Inc. | Pressure-operated switch |
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