CN104879347A - Magnetic pneumatic display - Google Patents
Magnetic pneumatic display Download PDFInfo
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- CN104879347A CN104879347A CN201410072624.4A CN201410072624A CN104879347A CN 104879347 A CN104879347 A CN 104879347A CN 201410072624 A CN201410072624 A CN 201410072624A CN 104879347 A CN104879347 A CN 104879347A
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- Prior art keywords
- piston
- display
- display device
- valve body
- magnetic force
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The invention discloses a magnetic pneumatic display comprising a valve body, a piston, a first magnetic element and a second magnetic element. The valve body is internally provided with a movable chamber. Opposite side walls of the valve body are respectively provided with a display hole and an air inlet. One end, facing the display hole, of the piston is configured to be the display end. The piston is movably disposed inside the valve body, and is movable between a return position of the display end in the movable chamber and a display position of the display end protruding from the display hole. At least a part of the outer circumferential wall of the piston cooperates with the inner wall of the movable chamber to limit a first chamber unit and a second chamber unit which are spaced, wherein the first chamber unit is in a normal pressure state, and the second chamber unit is communicated with the air inlet. The first magnetic element is arranged on the piston, and the second magnetic element is arranged on the valve body. The second magnetic element cooperates with the first magnetic element so as to drive the piston to move towards the return position. The magnetic pneumatic display can visually display air pressure values, is simple in structure, can safely and reliably work, has obvious indication effects even under critical states, and can be applied to various poor working conditions.
Description
Technical field
The present invention relates to detection facility field, especially relate to the pneumatic display device of a kind of magnetic force.
Background technique
In correlation technique, pneumatic control circuit adopts charged indicating device to carry out the working condition of display system usually, such as when detecting air-channel system pressure, uses pressure relay.The working principle of pressure relay is: when system pressure is higher than setting value, pressure relay sends electrical signal, and electrical signal is fed back to control circuit, and control circuit controls relevant sound, light alarm element, and alarm element sends alarm signal.The charged indication mechanism of this employing needs to arrange pneumo-electrical convertor, therefore cannot be suitable under the occasion that can not make power consumption control.And at present conventional pneumatic display device adopts spring force to reset, higher to the performance requirement such as material, fatigue of spring, and air pressure and spring force close to time, indicating effect is not obvious.
Summary of the invention
The present invention is intended at least solve the technical problem existed in prior art.For this reason, the object of the present invention is to provide the pneumatic display device of a kind of magnetic force, the pneumatic display device of this magnetic force is applicable to the occasion that can not make power consumption control, and when air pressure is close to critical value, indicating effect is still obvious.
According to the pneumatic display device of the magnetic force of the embodiment of the present invention, comprising: valve body, in described valve body, there is active chamber, the opposing sidewalls of described valve body is respectively equipped with the show hole and inlet hole that are communicated with described active chamber; Piston, one end towards described show hole of described piston is configured to display end, described piston stretches out in the reply position of described display end in described active chamber and described display end and is located in described valve body movably between the display position of described show hole, and the periphery wall at least partially of described piston and the inwall of described active chamber coordinate to limit isolated the first chamber being in atmospheric pressure state and the second chamber be communicated with described inlet hole; First magnetic absorption member, described first magnetic absorption member is located on described piston; Second magnetic absorption member, described second magnetic absorption member is located on described valve body, coordinates often to drive described piston to move to described reply position between described second magnetic absorption member with described first magnetic absorption member.
According to the pneumatic display device of the magnetic force of the embodiment of the present invention, by arranging the first magnetic absorption member on piston, valve body arranges the second magnetic absorption member, when making atmospheric pressure value in air-channel system lower than predetermined value, display end is not visible, when atmospheric pressure value in air-channel system is higher than predetermined value, display end is visual, thus, the pneumatic display device of magnetic force can show the atmospheric pressure value of air-channel system intuitively, and the structure of the pneumatic display device of magnetic force is simple, safe and reliable, under threshold state, indicating effect is still obvious.In addition, the pneumatic display device of magnetic force is without the need to using power supply, and therefore the pneumatic display device of magnetic force can be applicable to the working environment that various inflammable, explosive, moist, dust is large, high temperature, low temperature etc. are severe.
In addition, the pneumatic display device of magnetic force according to the present invention also can have following additional technical feature:
In some embodiments of the invention, described valve body comprises: body, and the open at one end of described body is to form opening; Valve gap, described valve gap is established on the body to close described opening, and described inlet hole is located on described valve gap.Thus, piston can enter in active chamber from opening, thus facilitates the assembling of the pneumatic display device of magnetic force, and simplifies the structure of the pneumatic display device of magnetic force.
Alternatively, described second magnetic absorption member be located at described valve gap towards on the end face of described piston.
Alternatively, described first magnetic absorption member be located at described piston towards on the end face of described valve gap.
In specific embodiments more of the present invention, the pneumatic display device of magnetic force also comprises transparent display cover, covers on described show hole outside described display cover.Thus, the aesthetics of the pneumatic display device of magnetic force can be improved, protect display end not by outside destroy simultaneously.In addition, it also avoid extraneous foreign matter and enter the first chamber from show hole, thus avoid the interference of foreign matter to piston, and then improve the functional reliability of the pneumatic display device of magnetic force.
Further, described valve body is provided with the exhaust port with described first chamber conducting.Thus make the first chamber to keep atmospheric pressure state.
Alternatively, the pneumatic display device of magnetic force also comprises seal ring, and described seal ring is located on the periphery wall contacted with described active chamber of described piston.Thus ensure the tightness of the first chamber, and then ensure the reliability that the pneumatic display device of magnetic force detects and accuracy.
In one particular embodiment of the present invention, described piston comprises first, second and the 3rd, described second is connected between described first and described 3rd, described 3rd cage structure becomes described display end, the periphery wall of described first coordinates with the inwall of described active chamber, and the cross-section area of described piston is reducing gradually from the direction of described first to described 3rd.
Particularly, the area of the end face towards described show hole of described second is greater than the area of described show hole, is only against in the part with described show hole of described valve body with the described end face of second described in when described piston is positioned at display position.Thus, piston can rest in display position place reposefully when triggering, thus it is impaired to avoid piston to rock in active chamber.
Alternatively, described first magnetic absorption member is magnet, and described second magnetic absorption member is magnet ring.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 be according to the pneumatic display device of the magnetic force of the embodiment of the present invention be positioned at reply position time schematic diagram;
Fig. 2 is schematic diagram when being positioned at display position according to the pneumatic display device of the magnetic force of the embodiment of the present invention.
Reference character:
The pneumatic display device 100 of magnetic force, reply position A, display position B,
Valve body 1, active chamber 10, first chamber 11, second chamber 12, show hole 13, inlet hole 14, exhaust port 15, body 16, valve gap 18,
Piston 2, display end 20, first 21, second the 22, the 3rd 23, circular groove 24,
First magnetic absorption member 3, magnet 31,
Second magnetic absorption member 4, magnet ring 41,
Seal ring 5, display cover 6
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, orientation or the position relationship of the instruction such as term " thickness ", " top ", " end ", " interior ", " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristics.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, except as otherwise noted, the implication of " multiple " is two or more.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; It can be mechanical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
Describe according to the pneumatic display device 100 of the magnetic force of the embodiment of the present invention below with reference to Fig. 1 and Fig. 2, wherein, the pneumatic display device of magnetic force 100 is for detecting the pressure of air-channel system (scheming not shown).
According to the pneumatic display device 100 of the magnetic force of the embodiment of the present invention, as depicted in figs. 1 and 2, comprising: valve body 1, piston 2, first magnetic absorption member 3 and the second magnetic absorption member 4.
See figures.1.and.2, there is in valve body 1 active chamber 10, the opposing sidewalls of valve body 1 is respectively equipped with the show hole 13 and inlet hole 14 that are communicated with active chamber 10.Wherein, inlet hole 14 is connected with air-channel system, and that is, the gas in air-channel system flows into active chamber 10 by inlet hole 14.
See figures.1.and.2, piston 2 is located in valve body 1 movably, and piston 2 has in valve body 1 replys position A(as shown in Figure 1) and display position B(is as shown in Figure 2).Wherein, one end towards show hole 13 of piston 2 is configured to display end 20, piston 2 can move between reply position A and display position B, represent that when display end 20 is positioned at active chamber 10 piston 2 is positioned at and reply position A, represent that when display end 20 stretches out show hole 13 piston 2 is positioned at display position B.Illustrate with the concrete example of Fig. 1 and Fig. 2, piston 2 can move between the roof of active chamber 10 and diapire, when piston 2 is only against the roof of active chamber 10, the display end 20 of piston 2 stretches out in show hole 13, now, piston 2 is positioned at display position B, and display end 20 is visual, namely can be observed display end 20 from the external world.When piston 2 is only against the diapire of active chamber 10, the display end 20 of piston 2 is retracted in active chamber 10, and now, piston 2 is positioned at replys position A, and display end 20 is not visible, namely cannot observe display end 20 from the external world.
In a concrete example of the present invention, the surface of piston 2 can have color layer (scheming not shown), and thus, when display end 20 stretches out show hole 13, the display effect of display end 20 is more obvious.Alternatively, color layer is red color layer or green layer.Certainly, the present invention is not limited thereto, such as, color layer can only be located on the surface of the surface of display end 20 or the extension of display end 20, again such as, in another concrete example of the present invention, the surface of display end 20 is provided with pattern layer (scheming not shown), when display end 20 stretches out show hole 13, this pattern layer also can strengthen the display effect of display end 20.
See figures.1.and.2, the periphery wall at least partially of piston 2 coordinates with the inwall of active chamber 10 to limit isolated first chamber 11 and the second chamber 12, that is, active chamber 10 is partitioned into the first chamber 11 and the second chamber 12 by piston 2, and cannot be communicated with between the first chamber 11 with the second chamber 12.
Wherein, the second chamber 12 is communicated with inlet hole 14, and that is, the gas in air-channel system flows in the second chamber 12 by inlet hole 14.First chamber 11 is in atmospheric pressure state, here, first chamber 11 keeps atmospheric pressure state by any mode, such as, the pneumatic display device of magnetic force 100 can comprise pipeline (scheming not shown), one end of pipeline is connected with the first chamber 11, and the other end of pipeline is connected with the external world, thus the first chamber 11 is in communication with the outside to keep atmospheric pressure state by this pipeline.It should be noted that, normal pressure refers to the atmospheric pressure in surroundings, and the atmospheric pressure value of normal pressure obtains by measuring in actual applications.
Be understandable that, because piston 2 can move between reply position A and display position B, therefore the volume of the first chamber 11 and the second chamber 12 is variable, when piston 2 is moved to display position B by reply position A, the volume-diminished of the first chamber 11 and the volume of the second chamber 12 increase, when piston 2 is moved to reply position A by display position B, the volume of the first chamber 11 increases and the volume-diminished of the second chamber 12.
First magnetic absorption member 3 is established on the piston 2, and the second magnetic absorption member 4 is located on valve body 1, coordinates and move to replying position A with normal driven plunger 2 between the second magnetic absorption member 4 with the first magnetic absorption member 3.What deserves to be explained is, " often " refers to usual state, namely non-trigger state.Specifically, magnetic force between first magnetic absorption member 3 and the second magnetic absorption member 4 is attraction force, and the second magnetic absorption member 4 makes piston 2 be subject to towards the attraction force of replying position A all the time, thus, under the non-trigger state of the pneumatic display device of magnetic force 100, this attraction force can driven plunger 2 move to reply position A.Such as, in the example shown in Fig. 1 and Fig. 2, the second magnetic absorption member 4 is located on the diapire of valve body 1, and thus, piston 2 is subject to the attraction force towards the diapire of valve body 1.Under non-trigger state, this attraction force driven plunger 2 moves to the diapire of valve body 1, until piston 2 is only against on the diapire of valve body 1.Now, the attraction force between the diapire of piston 2 and valve body 1 makes piston 2 not easily depart from the diapire of valve body 1.
Referring to Fig. 1 and Fig. 2, the Cleaning Principle of the pneumatic display device 100 of magnetic force is described in detail.
The side of piston 2 is the gas in the first chamber 11, first chamber 11 is the first pressure to the pressure of piston 2.It should be noted that, because the first chamber 11 is in atmospheric pressure state, and in reality, the atmospheric pressure value amplitude of fluctuation of normal pressure is less, and therefore, when the structure of piston 2 is determined, the first pressure can be approximately fixed value.
Piston 2 be subject to towards to reply the power of position A be the first pressure with attraction force with joint efforts.It should be noted that, when the structure of the first magnetic absorption member 3 and the second magnetic absorption member 4 and relative position are determined, attraction force can be determined.Wherein, when piston 2 is in reply position A, the attraction force of the second magnetic absorption member 4 that piston 2 is subject to is the first gravitation, and the first gravitation is determined value.
The opposite side of piston 2 is the second chamber 12, gas in second chamber 12 is the second pressure to the pressure of piston 2, wherein, the direction of the second pressure is contrary with the direction of the first pressure, therefore, when the second pressure can overcome making a concerted effort of the first pressure and attraction force, the second pressure can driven plunger 2 move towards display position B away from reply position A.Because the second chamber 12 is connected with air-channel system by inlet hole 14, therefore, the atmospheric pressure value of the second chamber 12 equals the atmospheric pressure value of air-channel system, and that is, when the structure of piston 2 is determined, the size of the second pressure is determined by the atmospheric pressure value of air-channel system.
When piston 2 be positioned at reply position A, when the atmospheric pressure value of air-channel system is less than predetermined value, the second pressure be less than the first pressure and the first gravitation with joint efforts, therefore piston 2 remains on and replys position A, now, display end 20 is not visible, and the pneumatic display device of magnetic force 100 is non-trigger state.When the atmospheric pressure value of air-channel system is greater than predetermined value, the second pressure is greater than making a concerted effort of the first pressure and the first gravitation, and now the second pressure-driven piston 2 moves to display position B, and now, display end 20 is visual, and the pneumatic display device 100 of magnetic force is trigger state.Here, predetermined value is atmospheric pressure value when making the second pressure equal making a concerted effort of the first pressure and the first gravitation.
It should be noted that, the size of attraction force and the distance between piston 2 and the second magnetic absorption member 4 are inversely proportional to, therefore when piston 2 be positioned at reply position A time, making a concerted effort of the first pressure and attraction force is maximum value.When piston 2 leave reply position A time, reducing with joint efforts of the first pressure and attraction force, and distance between piston 2 and the second magnetic absorption member 4 is far away, the first pressure and attraction force less with joint efforts.Therefore, when the atmospheric pressure value of air-channel system be greater than predetermined value and close to predetermined value time, the pneumatic display device 100 of magnetic force also can be triggered.Particularly, when the atmospheric pressure value of air-channel system is slightly larger than predetermined value, second pressure driven plunger 2 can leave reply position A, afterwards, along with the increase of the distance between piston 2 and the second magnetic absorption member 4, making a concerted effort of the first pressure and attraction force is less, and the pressure difference now between the making a concerted effort of the second pressure and the first pressure and attraction force is larger, can accelerate driven plunger 2 like this to move towards display position B, namely piston 2 more easily moves to display position B.Thus make the display effect of the pneumatic display device of magnetic force 100 obvious.
To sum up, when display end 20 is not visible, show that the atmospheric pressure value of air-channel system input gas is lower than predetermined value, when display end 20 can apparent time, show that the atmospheric pressure value of air-channel system input gas is higher than predetermined value.Thus, the pneumatic display device 100 of magnetic force can detect the atmospheric pressure value of air-channel system intuitively.Wherein, the structure of the pneumatic display device 100 of magnetic force is simple, and uses magnetic force to realize detecting and Presentation Function, makes the reliability and safety of the pneumatic display device of magnetic force 100 higher.And, the pneumatic display device 100 of magnetic force is without the need to using power supply, therefore the pneumatic display device of magnetic force 100 can be applicable to the working environment that various inflammable, explosive, moist, dust is large, high temperature, low temperature etc. are severe, such as, the pneumatic display device 100 of magnetic force can be used for the display of bleed pressure in pneumatic gas-control first-aid respirator.
According to the pneumatic display device 100 of the magnetic force of the embodiment of the present invention, by arranging the first magnetic absorption member 3 on the piston 2, valve body 1 arranges the second magnetic absorption member 4, when making atmospheric pressure value in air-channel system lower than predetermined value, display end 20 is not visible, when atmospheric pressure value in air-channel system is higher than predetermined value, display end 20 is visual, thus, the pneumatic display device 100 of magnetic force can show the atmospheric pressure value of air-channel system intuitively, and the structure of the pneumatic display device 100 of magnetic force is simple, safe and reliable, under threshold state, indicating effect is still obvious.In addition, the pneumatic display device 100 of magnetic force is without the need to using power supply, and therefore the pneumatic display device of magnetic force 100 can be applicable to the working environment that various inflammable, explosive, moist, dust is large, high temperature, low temperature etc. are severe.
In some embodiments of the invention, as depicted in figs. 1 and 2, valve body 1 comprises body 16 and valve gap 18.Wherein, the open at one end of body 16 is to form opening, and valve gap 18 is located at closing openings on body 16, and inlet hole 14 is located on valve gap 18.Thus, piston 2 can enter in active chamber 10 from opening, thus facilitates the assembling of the pneumatic display device 100 of magnetic force, and simplifies the structure of the pneumatic display device 100 of magnetic force.
In the example shown in Fig. 1 and Fig. 2, body 16 is formed as the cylindrical of bottom-open, and show hole 13 is located on the roof of body 16, and show hole 13 is formed as the circular port running through body 16 on the thickness direction of body 16, and show hole 13 and body 16 are coaxially arranged.Active chamber 10 is also formed as cylindrical, and active chamber 10 and body 16 are coaxially arranged.Valve gap 18 is formed as circular lid, and valve gap 18 forms the diapire of valve body 1, and valve gap 18 and body 16 are coaxially arranged.Inlet hole 14 is located on valve gap 18, and inlet hole 14 is formed as the circular port running through valve gap 18 on the thickness direction of valve gap 18, and inlet hole 14 and valve gap 18 are coaxially arranged.Here it should be noted that, thickness direction refers to the direction of from the external world to active chamber 10.Certainly, the shape of valve body 1 of the present invention is not limited thereto, only otherwise affect the Presentation Function of the pneumatic display device 100 of magnetic force.
Particularly, first magnetic absorption member 3 be located at piston 2 towards on the end face of valve gap 18, second magnetic absorption member 4 be located at valve gap 18 towards on the end face of piston 2, such as, in the example shown in Fig. 1 and Fig. 2, first magnetic absorption member 3 is located on the bottom surface of piston 2, second magnetic absorption member 4 is located on the end face of valve gap 18, thus, when piston 2 is positioned at reply position A, distance between first magnetic absorption member 3 and the second magnetic absorption member 4 is less, make under being the prerequisite of the first gravitation with the attraction force between piston 2 and the second magnetic absorption member 4, the size of the first magnetic absorption member 3 and/or the second magnetic absorption member 4 is less, thus be convenient to the size reducing the pneumatic display device 100 of magnetic force.
Alternatively, the first magnetic absorption member 3 is magnet 31, and the second magnetic absorption member 4 is magnet ring 41.In the example shown in Fig. 1 and Fig. 2, magnet ring 41 and inlet hole 14 are coaxially arranged, and magnet 31 is formed as circular, and magnet 31 and magnet ring 41 are coaxially arranged.
In some embodiments of the invention, as depicted in figs. 1 and 2, the pneumatic display device of magnetic force 100 also comprises transparent display cover 6, covers on show hole 13 outside display cover 6.When display end 20 stretches out from show hole 13, cover on display end 20 outside display cover 6, thus, the aesthetics of the pneumatic display device 100 of magnetic force can be improved, protect display end 20 not by outside destroy simultaneously.In addition, it also avoid extraneous foreign matter and enter the first chamber 11 from show hole 13, thus avoid the interference of foreign matter to piston 2, and then improve the functional reliability of the pneumatic display device 100 of magnetic force.
Alternatively, display cover 6 is formed as hemispherical shell, and display cover 6 is coaxially arranged with body 16, display cover 6 with between body 16 for being fixedly connected with.
Further, as depicted in figs. 1 and 2, valve body 1 is provided with the exhaust port 15 with the first chamber 11 conducting, thus makes the first chamber 11 to keep atmospheric pressure state.Particularly, exhaust port 15 is located on the sidewall of body 16, and exhaust port 15 is formed as the circular port running through body 16 on the thickness direction of body 16.Certainly, the position of exhaust port 15 is not limited thereto, and exhaust port 15 also can be located on the roof of body 16, and exhaust port 15 also can be located on display cover 6, as long as the first chamber 11 can be made to keep atmospheric pressure state.
In one particular embodiment of the present invention, as depicted in figs. 1 and 2, piston 2 comprise first 21, second 22 and the 3rd 23.
Wherein, the periphery wall of first 21 coordinates with the inwall of active chamber 10, limits the first chamber 11 between the roof of the diapire of first 21 and the inwall of active chamber 10, valve gap 18.Be formed as the shape with the shape adaptation of active chamber 10 for first 21, such as, in the example of fig. 1 and 2, first 21 is formed as cylindrical.
Be connected to first 21 for second 22 and between the 3rd 23, the cross-section area of piston 2 is reducing gradually from the direction of first 21 to the three 23.Be configured to display end 20 for 3rd 23, when piston 2 is positioned at display position B, the 3rd 23 is stretched out in show hole 13.
Here, the shape of second 22 and the 3rd 23 does not do concrete restriction, as long as can be used as display end 20 and stretch out in show hole 13 for the 3rd 23.Process for convenience of piston 2, in a concrete example of the present invention, piston 2 is formed as multidiameter shaft, and that is, first 21, second 22 and the 3rd 23 is formed as coaxial cylindrical.
Particularly, the area of the end face towards show hole 13 of second 22 is greater than the area of show hole 13, only be against in the part with show hole 13 of valve body 1 with the end face of second 22 when piston 2 is positioned at display position B, thus, piston 2 can rest in display position B place reposefully when triggering, thus it is impaired to avoid piston 2 to rock in active chamber 10.
Further, the pneumatic display device 100 of magnetic force also comprises seal ring 5, and seal ring 5 is located on the periphery wall contacted with active chamber 10 of piston 2, thus ensures the tightness of the first chamber 11, and then ensures the reliability that the pneumatic display device 100 of magnetic force detects and accuracy.Particularly, as depicted in figs. 1 and 2, seal ring 5 is formed as ring, and seal ring 5 is located on the periphery wall of first 21.Alternatively, the outer circumferential face of piston 2 is provided with circular groove 24, and seal ring 5 is fastened in circular groove 24, and thus, the position of seal ring 5 is fixed, thus ensures the sealing effect of seal ring 5.
According to the pneumatic display device 100 of the magnetic force of the embodiment of the present invention, by active chamber 10 is formed as cylindrical, piston 2 is designed to the multidiameter shaft coaxial with active chamber 10, thus makes magnetic force pneumatic display device 100 structure simple, and easy processing is with low cost.By being provided with seal ring 5, thus improve the functional reliability of the pneumatic display device 100 of magnetic force.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (10)
1. the pneumatic display device of magnetic force, is characterized in that, comprising:
Valve body, has active chamber in described valve body, the opposing sidewalls of described valve body is respectively equipped with the show hole and inlet hole that are communicated with described active chamber;
Piston, one end towards described show hole of described piston is configured to display end, described piston stretches out in the reply position of described display end in described active chamber and described display end and is located in described valve body movably between the display position of described show hole, and the periphery wall at least partially of described piston and the inwall of described active chamber coordinate to limit isolated the first chamber being in atmospheric pressure state and the second chamber be communicated with described inlet hole;
First magnetic absorption member, described first magnetic absorption member is located on described piston;
Second magnetic absorption member, described second magnetic absorption member is located on described valve body, coordinates often to drive described piston to move to described reply position between described second magnetic absorption member with described first magnetic absorption member.
2. the pneumatic display device of magnetic force according to claim 1, is characterized in that, described valve body comprises:
Body, the open at one end of described body is to form opening;
Valve gap, described valve gap is established on the body to close described opening, and described inlet hole is located on described valve gap.
3. the pneumatic display device of magnetic force according to claim 2, is characterized in that, described second magnetic absorption member be located at described valve gap towards on the end face of described piston.
4. the pneumatic display device of magnetic force according to claim 3, is characterized in that, described first magnetic absorption member be located at described piston towards on the end face of described valve gap.
5. the pneumatic display device of magnetic force according to claim 1, is characterized in that, also comprises transparent display cover, covers on described show hole outside described display cover.
6. the pneumatic display device of magnetic force according to claim 5, is characterized in that, described valve body is provided with the exhaust port with described first chamber conducting.
7. the pneumatic display device of magnetic force according to claim 1, is characterized in that, also comprise seal ring, and described seal ring is located on the periphery wall contacted with described active chamber of described piston.
8. the pneumatic display device of the magnetic force according to any one of claim 1-7, it is characterized in that, described piston comprises first, second and the 3rd, described second is connected between described first and described 3rd, described 3rd cage structure becomes described display end, the periphery wall of described first coordinates with the inwall of described active chamber, and the cross-section area of described piston is reducing gradually from the direction of described first to described 3rd.
9. the pneumatic display device of magnetic force according to claim 8, it is characterized in that, the area of the end face towards described show hole of described second is greater than the area of described show hole, is only against in the part with described show hole of described valve body with the described end face of second described in when described piston is positioned at display position.
10. the pneumatic display device of magnetic force according to claim 1, is characterized in that, described first magnetic absorption member is magnet, and described second magnetic absorption member is magnet ring.
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| CN201410072624.4A CN104879347B (en) | 2014-02-28 | 2014-02-28 | The pneumatic display of magnetic force |
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| CN201410072624.4A CN104879347B (en) | 2014-02-28 | 2014-02-28 | The pneumatic display of magnetic force |
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| CN104879347A true CN104879347A (en) | 2015-09-02 |
| CN104879347B CN104879347B (en) | 2018-04-20 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB891246A (en) * | 1958-06-17 | 1962-03-14 | Pall Corp | Magnetic pressure indicator |
| GB1223803A (en) * | 1968-06-03 | 1971-03-03 | Carborundum Co | Differential pressure indicator |
| US4029042A (en) * | 1976-02-17 | 1977-06-14 | Aircraft Systems Corporation | Differential pressure indicator device |
| US4867095A (en) * | 1988-04-05 | 1989-09-19 | Parker Hannifin Corporation | Differential pressure indicator |
| GB2189603B (en) * | 1986-04-21 | 1989-11-29 | Facet Enterprises | Pressure differential indicator with non-mechanical thermal lockout |
| US5237957A (en) * | 1992-07-08 | 1993-08-24 | Liucci Charles A | Pressure indicator |
| CN2234301Y (en) * | 1995-11-22 | 1996-09-04 | 陈忠 | Pressure differential signaler |
| CN203756650U (en) * | 2014-02-28 | 2014-08-06 | 北京谊安医疗系统股份有限公司 | Magnetic force pneumatic displayer |
-
2014
- 2014-02-28 CN CN201410072624.4A patent/CN104879347B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB891246A (en) * | 1958-06-17 | 1962-03-14 | Pall Corp | Magnetic pressure indicator |
| GB1223803A (en) * | 1968-06-03 | 1971-03-03 | Carborundum Co | Differential pressure indicator |
| US4029042A (en) * | 1976-02-17 | 1977-06-14 | Aircraft Systems Corporation | Differential pressure indicator device |
| GB2189603B (en) * | 1986-04-21 | 1989-11-29 | Facet Enterprises | Pressure differential indicator with non-mechanical thermal lockout |
| US4867095A (en) * | 1988-04-05 | 1989-09-19 | Parker Hannifin Corporation | Differential pressure indicator |
| US5237957A (en) * | 1992-07-08 | 1993-08-24 | Liucci Charles A | Pressure indicator |
| CN2234301Y (en) * | 1995-11-22 | 1996-09-04 | 陈忠 | Pressure differential signaler |
| CN203756650U (en) * | 2014-02-28 | 2014-08-06 | 北京谊安医疗系统股份有限公司 | Magnetic force pneumatic displayer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104879347B (en) | 2018-04-20 |
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